SOUTHERN REGIONAL POWER COMMITTEE - Kar · 2013. 9. 3. · SOUTHERN REGIONAL POWER COMMITTEE BANGALORE MINUTES OF THE 86th MEETING OF THE OPERATION COORDINATION COMMITTEE OF SRPC

SOUTHERN REGIONAL POWER COMMITTEE BANGALORE

MINUTES OF THE 86th MEETING OF THE OPERATION COORDINATION COMMITTEE OF SRPC HELD AT NTPC RAMAGUNDAM ON 13thAUGUST 2013

1. INTRODUCTION

1.1 The 86th Meeting of the Operation Coordination Sub Committee was conducted at

NTPC, Ramagundam on 13th August 2013. The list of Participants is furnished at

Annexure-1.

1.2 Shri C.S. Srinivas, AGM, NTPC Ramagundam welcomed Shri S.R. Bhat, MS I/c

SRPC, Shri K. Viswanathan Director(O), TANTRANSCO, Shri H.S. Keshavamurthy,

CEE, KPTCL, GMs of other NTPC Stations and delegates to NTPC Ramagundam to

the 86th OCC meeting. He added that the SRPC forum was providing very valuable

directions for the smooth grid operation of SR. The Saga of NTPC Ramagundam was

also presented and following are the salient points:

NTPC was established as Central PSU in 1975 to bridge the gap between Electricity Demand and Power supply in India.

The station was initially identified as Godavari STPS with a capacity of 2,100 MW. Presently it is known as Ramagundam STPS.

Funds were tied up through World Bank in February 1980. The Main contract was in place with the target generation by February 1984.

The dream project required not only involved construction of main plant and auxiliaries but also development of water reservoirs of 5,000 acres, ash pond of 2,000 acres and township of 1000 acres.

Meritorious Productivity Award in the first year of operation (1985) by CEA.

Productivity, Energy Conservation and Safety, Environment and Industrial Relation Awards received from reputed institutions of India and Abroad.

Prime Minster Shram Bhushan Awards, Karmika Rathna Awards & Vishwa Karma Rashtriya Puraskar were received by NTPC Personnel.

Participative Management and active interaction with employees through their respective bodies is a way of life in Ramagundam.

Number of steps taken on the Corporate Social Responsibility (CSR) front.

In the year 2001, team was given onus of building of 500 MW at this location. Record created in Power Sector at Global Level by completing the same in 36 months & 10 days.

Minutes of the 86th OCC Meeting of SRPC held on 13th August 2013

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This 500 MW unit was adjudged as best executed 500 MW in the year 2005.

At international level this was recognized by IPMA and short listed for the Award in the year 2005.

The station is committed for Environment, Safety and Total Quality Management (TQM).

The Station had taken afforestation works. This had resulted in reduced temperature level in surroundings, improved ground water levels and vegetation.

Presently 67 % of ash utilization was being achieved.

The station has Integrated Management Systems covering ISO 14001, OHSAS 18001, ISO 9001-2000 certifications.

AGM requested Shri Subhasis Ghosh, GM, I/c Ramagundam NTPC to address the

gathering.

1.3 GM I/c, NTPC, Ramagundam welcomed the distinguished Members and Participants

to the OCC. He thanked MS, I/c SRPC for having given NTPC Ramagundam the

opportunity to hold this meeting. Besides having 2,600 MW of installed capacity at

Ramagundam, 2000 MW at Simhadri and 360 MW at Kayamkulam, NTPC had

recently commissioned 5 MW Solar Plant at Port Blair in SR. MoU target for 2012-13

with GoI had been achieved only by NTPC SR. Except Simhadri, which had faced

coal related issues all other stations in the region had generated more than the MoU

target. Against a target of 700 MU, Kayamkulam had achieved record generation of

about 1500 MU. Unit I at Vallur was declared in commercial operation during

November 2012 while Unit II had achieved full load in February 2013. 3x800 MW

Kudgi Project in Karnataka was also in fast track mode. Boiler erection for Unit I was

under progress and the project activities were in full swing. NTPC was committed to

SR constituents to sustain and improve its performance. Out of 15 NTPC Stations,

Ramagundam was the best performing station. He added that the NTPC team of SR

would be rendering its best performance and also assured that Grid Discipline would

be of paramount importance. He expressed hope that the stay of the Members had

been comfortable.

1.4 The Overview of Ramagundam Station was then presented and highlights are given

below:


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Foundation laid in the year 1978.

2,600 MW Pit Head STPS located in Karimnagar District, Andhra Pradesh.

Features:

Coal Supply from SCCL, SECL and MCL.

Water source from Sri Ram Sagar Dam.

Land area 9,596 acres includes reservoirs.

Project Cost for Stage I & II Rs. 20,590 Crores and for Stage III

Rs.1,818 Crores.

All units were commissioned ahead of the schedule.

Unit Date of Commissioning Ahead of schedule in months

I 27.10.1983 4 II 29.05.1984 3 III 13.12.1984 2 IV 26.06.1988 1 V 26.03.1989 4 VI 16.10.1989 9 VII 31.08.2004 11

Performance:

Year 2008-09 2009-10 2010-11 2011-12 2012-13

PLF (%)

AVF (%)

PLF (%)

AVF (%)

PLF (%)

AVF (%)

PLF (%)

AVF (%)

PLF (%)

AVF (%)

Stg-1 88.14 89.26 98.62 99.09 89.05 92.49 90.86 94.73 92.45 94.82

Stg-2 96.92 95.48 91.16 89.81 90.07 92.38 93.86 94.99 92.26 92.36

Stg-3 94.65 92.77 101.2 98.65 92.32 92.74 93.34 94.95 86.82 86.78

Stn. 94.45 93.52 94.81 93.65 90.27 92.48 93.07 94.92 91.26 91.86

Reasons for generation losses like poor quality receipt, less scheduling and high frequency were highlighted.

Water Consumption Pattern:

A number of water conservation and liquid waste treatment measures had been initiated.

Ash Pond Management: Energy dissipation structures along with stilling chambers, extra culvert, pucca concrete channel and RCC long wall have been constructed so as to minimise the impact of water escape, if any,

Year 2008-09 2009-10 2010-11 2011-12 Water Consumption (TMC) 3.12 2.98 3.00 3.38 Water Recycled (TMC) 1.18 1.48 1.52


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from ash pond.

Measures had been taken to control air quality near ash pond area. All the ash related parameters are within limits.

Dry Ash Extraction System (DAETP) has been installed in Unit-2&3 and Unit-7 for extraction of dry fly ash from ESP hoppers and loading directly into tankers/ trucks for reuse of ash for Brick/ Cement/RMC purposes.

1.5 Shri S.R. Bhat, Member Secretary I/c, SRPC welcomed the delegates to the Meeting.

He thanked Regional ED and GM, I/c Ramagundam for kindly consenting to host the

OCC meeting. He noted that the NTPC success story lay not only in its performance

but also on the vast experience, organizational & financial skills on account of which

NTPC was a pioneer in its field. Ramagundam was a model thermal station which

could be appreciated by its performance and other achievements. NTPC team under

the leadership of GM I/c NTPC had made meticulous planning for the meeting. The

immaculate maintenance of the overall Plant and colony had been appreciated by all

the OCC Members.

On the grid operation side, MS I/c informed that revised high voltage set points for

400 kV lines had been communicated to the utilities to ensure tripping in a staggered

and coordinated manner which was required to be implemented at the earliest. The

2nd meeting on RGMO and MVAR interchange was also conducted on 25th July 2013

during which number of actions had been finalized. It was generally observed that the

Primary response was not up to the desired levels, UFR relief realization was only

about 30- 35 %. Ramagundam station was by and large rendering excellent MVAR

support, while on the RGMO front there was scope for some improvement. All the

eligible units in the SR grid, irrespective of ownership, would need to contribute so as

to maintain grid parameters within the IEGC range. A special TCC meeting had also

been scheduled for 21st August 2013 to discuss these issues. Grid Incidents/tripping

were being analyzed for reasons, action plan for revival so as to avoid reoccurrence

in the future. In the 7th June incident, grid frequency had remained at 48.82-48.83 Hz

level for sustained period of time. Hence there was a need for adequate safety net

especially since UFR/ df/dt relief obtained were not up to the desired level. For past

few days, instances of high frequency operation had increased. SRPC had made a

presentation for an instance on 30th July 2013 when the frequency was about 30% of

time above 50.2 Hz to analyze the associated issues. Conserving of fuel thus


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improving coal stock and also hydro resource optimization needed to be carried out.

With proactive approach of SRLDC, Gazuwaka AC bypass mock exercise had been

recently completed. Sustained high frequency operation, however should not lead the

operators into complacency since other parameters such as line loading etc were

also important. He appreciated NLC TS-I Expn. for achieving availability greater than

100 % during the month of July 2013.He requested Director (O) TANTRANSCO and

CEE, KPTCL to address the gathering.

1.6 CEE, LD, KPTCL welcomed all the officers to the OCC meeting. On behalf of OCC,

he appreciated NTPC Ramagundam for excellent maintenance of the Plant and

township. He placed on record the Dedication of the NTPC officers and the staff in

this regard. NTPC stations of SR especially Ramagundam had been performing quite

well. Surrender of power was being carried out as a last resort to keep grid

parameters within limits. By and large, Karnataka was being able to meet its demand

except during last week when load shedding had to be resorted to, on account of

non-availability of 500 MW at BTPS, 1200 MW at UPCL and around 1200 MW at

Raichur. He added that the Thermal availability was likely to improve with some units

coming back. SR grid despite facing high deficit was maintaining strict grid discipline

which was borne by the fact that there had been no grid disturbance in SR during the

last decade.

1.7 Director (O), TANTRANSCO said that he was pleased to be participating in the OCC

meeting along with all the SR constituents. He said that NTPC Ramagundam station

was a trend setter and a target setter for others to emulate. During the visit to the

station despite high generation level, the tranquility was admirable. The NTPC

personnel were carrying out their work with utmost discipline and the same

experience could to be shared and implemented in other stations of SR as well. He

thanked NTPC for the hospitality extended by them.

1.8 Superintending Engineer (O), SRPC took up the Agenda for discussions.


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2. CONFIRMATION OF THE MINUTES OF THE 85th MEETING OF OCC OF SRPC HELD ON 11thJULY 2013

The Minutes of 85th OCC meeting were confirmed.

3. MONTHLY OUTAGE PLAN

3.1 ISGS/CGS Units The following outages of Generating Units were approved:

SL. No. Station Name

Station Capacity

IN MW From To No. Of

days Remarks

NTPC 1 Simhadri Stage II Unit 1 500 01-Aug-13 30-Aug-13 30 2 Ramagundam Unit 2 200 24-Aug-13 17-Sep-13 25

3 Kayamkulam RGCCPP STG III 126 17-Aug-13 28-Aug-13 12

4 Simhadri Stage I Unit 2 500 20-Sep-13 19-Oct-13 30 AP to confirm NLC

1 NLC TS I - 7A 50 16-Aug-13 15-Sep-13 31 2 NLC TS I - 7B 50 16-Aug-13 05-Sep-13 21 3 NLC TS I Unit 9A 50 17-Sep-13 07-Oct-13 21 4 NLC TS I Unit 9B 50 17-Sep-13 07-Oct-13 21 5 NLC TS II Unit 4 210 20-Aug-13 18-Sep-13 30 NLC confirmed

that overlap would be avoided

6 NLC TS II Unit 5 210 08-Aug-13 01-Oct-13 55 7 NLC TS II Unit 2 210 17-Sep-13 16-Oct-13 30 8 NLC TS I EXP Unit 2 210 22-Sep-13 31-Oct-13 40

NPCIL

1 Kaiga Unit-3 220 Rescheduled to Nov/Dec 2013.

NPCIL informed that SD would be for 7 to 10 days.OCC stated that SD should be completed before Dec 2013.

OCC observed that Regional demand would pick up by January 2014 and hence

Shutdown of all major units should be completed before Dec 2013.

3.2 ISTS/State Sector Transmission Elements The outage proposals for the month of August and September 2013 in respect of

Central and State Transmission elements were discussed and outage dates

approved. The same was hosted on SRPC website

(http://www.srpc.kar.nic.in/website/2013/operation/plout13-08-13.pdf).


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4. AVAILABILITY AND REQUIREMENT

4.1 The Table below furnishes the anticipated availability as furnished in the 85th OCC

against the actual availability for the month of July 2013: (Figures in MU)

4.2 DE, APTRANSCO informed that the consumption had been less on account of fall in

the demand since monsoon was active.

4.3 CEE, KPTCL informed that on account of decrease in demand, significant quantum

of generation from thermal stations had been backed down.

4.4 EE, KSEB informed that on account of increase in the hydro generation, the

restrictions had been removed.

4.5 EE, TANTRANSCO informed that the actual consumption had been more on account

of relaxation of R & C measures.

4.6 Anticipated availability and consumption for the months of August 2013& September 2013

The anticipated availability and consumption as furnished by the states for the next

two months – August 2013 & September 2013 are furnished below:

August 2013 (EX-Bus Figures in MU) STATE Andhra

Pradesh Karnataka Kerala Tamil Nadu Total SR

Thermal Generation 84.56 35.48 53.43 173.47 Diesel & gas generation 3.35 0.26 0.46 6.70 10.76 Hydro generation 33.51 42.94 27.74 16.93 121.11 CGS drawals 40.37 30.00 20.06 53.49 143.92 Simhadri TPS 23.50 23.50 ER/NR 4.92 2.03 6.95

STATES

Actuals furnished by

States for 86th OCC

Anticipated availability as furnished by States

in 85th OCC Variation

Andhra Pradesh 221.16 234.03 -12.87 Karnataka 139.91 152 -12.09 Kerala 51.19 48.26 2.93 Tamil Nadu 249.75 238.78 10.97


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Imports & Purchases from IPPS 17.40 36.00 9.68 103.55 166.63

Proposed Purchase 39.11 10.81 49.92 Total Availability 246.72 155.00 55.06 234.08 690.86 Anticipated Requirement 269.83 155.00 55.06 258.85 738.75 Deficit / Day -23.11 -24.77 -47.89 Surplus / Day** 0.48 4.91 5.39 Restriction & Control Measures 23.11 24.00 47.11

** Hydro and other generation/purchases would be regulated to meet the demand.

September 2013 (EX-Bus Figures in MU)

STATE Andhra Pradesh Karnataka Kerala Tamil

Nadu Total SR

Thermal Generation 100.77 45.00 60.97 206.74 Diesel & gas generation 2.97 0.27 0.46 6.68 10.38 Hydro generation 42.91 42.70 30.13 18.78 134.52 CGS drawals 45.99 35.00 20.57 55.41 156.96 Simhadri TPS 19.19 19.19 ER/NR 4.92 2.03 6.95 Imports & Purchases from IPPS 17.40 30.67 11.50 116.78 176.34 Proposed Purchase 50.74 10.80 61.54 Total Availability 281.72 152.00 56.83 258.61 749.16 Anticipated Requirement 281.72 152.00 56.83 260.24 750.79 Deficit / Day -1.63 -1.63 Surplus / Day** 3.17 12.43 7.86 23.46 Restriction & Control Measures 25.00 25.00

** Hydro and other generation/purchases would be regulated to meet the demand.

The constituents agreed to initiate requisite measures to maintain appropriate load

generation balance in their systems, and adhere to the IEGC provisions.

5. REVIEW OF THE POWER SUPPLY POSITION 5.1 Grid Highlights

Frequency remained within IEGC range (49.7-50.2 Hz) for 88.34% of time (June 2013 – 88.14%, July 2012 – 92.19% [49.5-50.2 Hz]).

Frequency remained below 49.7 Hz for 2.08% of time and average frequency for the month was 50.00 Hz.

Frequency remained above 50.2 Hz for 9.58% of time. Andhra Pradesh, Karnataka, Kerala & Tamil Nadu imported 207 MU,

2 MU, 137 MU & 679 MU respectively inter-regionally through bilateral exchanges.


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Utilities located in Andhra Pradesh, Karnataka, Kerala & Tamil Nadu imported 417 MU, 13 MU, 6 MU &74 MU respectively through Power Exchange.

Utilities located in Andhra Pradesh, Karnataka, Kerala, SEPL & MEPL exported 40 MU, 202 MU, 36 MU, 21 MU &18 MU respectively through Power Exchange.

Andhra Pradesh imported 536 MU intra-regionally.

Utilities located in Andhra Pradesh and Tamil Nadu imported around 0.25 MU & 2 MU from the utilities located in Karnataka.

Karnataka IPPs exported 321 MU intra-regionally.

20.60 MW of Wind Mill (Private Sector) Installed Capacity was added to Tamil Nadu during the month.

5.2 LGBR forecasted figures vs. actual figures It was noted that the variations between actual and forecasted availability/

requirements LGBR figures were less than 10% in respect of all the States except in

respect of the following cases:

Forecasted Actual Deviation from Actual

% Variation Reason

Andhra Pradesh

Energy Requirement (MU) 8479 7618 -861 -10 Negative growth due to active monsoon. Demand Requirement (MW) 13408 11986 -1419 -11

Karnataka

Energy Availability (MU) 5128 4291 -837 -16 Reduced thermal generation due to less demand.

Energy Requirement (MU) 6104 4753 -1351 -22 Requirement was less due to wide spread rains. Demand Requirement (MW) 9767 8088 -1679 -17

Kerala

Energy Availability (MU) 1261 1605 344 +27 More hydro generation due to spilling of reservoirs.

Energy Requirement (MU) 1853 1618 -235 -13 Less demand due to good monsoon.

Demand Availability(MW) 2340 3007 +667 +29 More hydro generation due to spilling of reservoirs.

Demand Requirement (MW) 3508 3145 -363 -10 Less demand due to good monsoon.


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Tamil Nadu

Energy Availability (MU) 6991 7724 733 +10 Increase due to thermal generation and infirm power from MTPS, NCTPS new units & purchases.

Demand Availability (MW) 9413 11591 2178 +23

5.3 MoP targets vs. actual It was noted that MoP monthly generation targets for the month of July

2013/Cumulative were not met in respect of the following.

Constituent Deficit in July 2013 target Reason

Deficit in Cumulative

target Reason

Andhra Pradesh

Hydro, Thermal & Simhadri -I

Delayed inflows, fall in demand Thermal

Preponement of maintenance and fall in demand due to monsoon

Karnataka Thermal& UPCL Low Demand and Backing down of Thermal Units

Hydro & Thermal

Low Demand. Conservation of Hydro and Backing down of Thermal Units

Kerala

Diesel Low Demand Hydro Utilization from Central Sector, purchases and conservation of Hydro.

Tamil Nadu IPPs, Wind mill and NLC TS -I

Fall in demand due to monsoon, less wind mill generation than anticipated and maintenance of NLC units

Hydro and Windmill

Conservation of Hydro and less wind mill generation than anticipated

Simhadri-II, NTPC

Thermal Due to PG test of Unit 2 and forced outage

Thermal Due to PG test of Unit 2 and forced outage

Talcher-II, NTPC

Thermal Preponement of Annual Overhaul & Coal Deficit

MAPS Nuclear Unit outage due to GT failure.

Nuclear Unit outage due to GT failure.

5.4 Demand / Energy

5.4.1 The Table below furnishes the details of actual Maximum Demand met (MW) &

Average Energy Consumption per day (MU) in respect of the SR constituents for

July 2013 vis-à-vis July 2012. The maximum daily consumption by the respective

constituents during July 2013 is also included.


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System

Actual Maximum Demand (MW)

Average Consumption/day (MU)

Max. Daily Consumption during July 2013 (MU)

July 2013

July 2012 %-age July

2013 July 2012 %-age

Andhra Pradesh

11341

9936 +14.14 229.09 217.00 5.57 251.48

Karnataka 7474 7997 -6.54 143.29 154.00 -6.96 154.90

Kerala 3024 3268 -7.46 51.43 54.00 -4.76 55.65

Tamil Nadu 11794 11105 +6.21 255.22 240.00 6.34 262.69

Puducherry 324 311 4.04 6.55 6.35 3.19 6.71

Southern Region 31620 30831 +2.56 685.58 671.00 2.17 715.33

5.4.2 It could be seen from the above that the Peak Demand for Andhra Pradesh & Tamil

Nadu had recorded a positive growth rate of 14% & 6% respectively as compared

to July 2012 while it recorded a negative growth rate of around 7% for Karnataka &

Kerala. Southern Region as a whole had met maximum demand of 31,620 in July

2013, which was only 789 MW more than last year’s figure of 30,831 MW. In terms

of average daily energy consumption Andhra Pradesh & Tamil Nadu registered a

positive growth rate 6% while Karnataka & Kerala recorded a negative growth rate

of 7% & 5% respectively.

5.4.3 It was also observed from the SR Load Duration Curve for July 2013 (Annexure-5A) that the loads had substantially increased compared to July 2012.

5.5 Hydel Availability

5.5.1 The energy availability in major hydel reservoirs at the end of July 2013 vis-à-vis

that for July 2012 was reviewed, which is detailed below: (Figures in MU)

System

ReservoirEnergy at FRL

Storage as on Inflows in July 2013 31.07.13 31.07.12 Anticipated Actual

ANDHRA PRADESH Jalaput Srisailam (MDDL:243.8m) Nagarjunasagar (MDDL:149.3m) *Level in meters

495

269.8*

179.8*

266831.68*946.27

268.96*343.66

164.26*

377834.54*

62263.23*

519168.25*

97

250

169

1300


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KARNATAKA Linganamakki Supa

45473152

41772234

25301521

1801 841

3232 1720

KERALA Idukki Kakki Total

2148916

3843

1630723

3245

1195448

2306

564 312 1477

940 474 2427

TAMIL NADU Nilgiris Total (Excluding Mettur) Mettur

15042183

12421760

158

8131247

340 600 63

818 1372

175

5.5.2 SRLDC informed that hydro storage as on 31.07.2013 was 284 % & 84% more

compared to last year & w.r.t 10 yrs monthly average.

6. MAJOR ISSUES

6.1 Sudden change in load by Beneficiary Regional Entities in SR 6.1.1 SRLDC vide letter dated 10th July 2013 (Annexure-6A) had referred under clause

1.5 of IEGC that there had been a number of instances of violation of IEGC clause

5.2(j). Some of the critical instances where change in load was more than 100 MW

had been also listed. MS, SRPC vide letter dated 12th July 2013 (Annexure-6B) had requested all concerned that action may please be arranged so that IEGC

clause 5.2(j) is complied with and any sudden change in demand by more than 100

MW is avoided.

6.1.2 SRLDC and SRPC suggested that the constituents comply with Regulation 5.2(j) of

IEGC and sudden change of more than 100 MW be avoided.

6.2 Comprehensive Award Scheme for Power Sector for the year 2012-13 6.2.1 It had been requested that Transmission System Availability for the year 2012-13 in

the specified formats be kindly arranged to be furnished to SRPC

([email protected]& [email protected] ) with a copy to CEA(E-mail ID

[email protected]) by 16th August 2013. SRPC letter dated 26th July 2013

enclosing GM Division letter No. 8/X/TEC/GM-2013/807-846 dated 12th July 2013 is

at Annexure-6C. 6.2.2 MS I/c SRPC informed that the required information/data had been received from

SR-I and SR- II POWERGRID. He requested other TRANSCOs to similarly furnish

the data by 14th August 2013.


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6.3 Grid incident that occurred on 7th June 2013 at 10:47 hrs

6.3.1 In the 85th OCC meeting held on11th July 2013, the Grid incident that occurred on

7th June 2013 had been discussed. After deliberations on the issue the following

had been summarized:

TN to assess its actual loss of generation The reasons for any additional loss in Wind Generation, if any, need to be

identified by TN. Remedial action needed to be expedited. Computation of TN demand needed to be relooked. Automation of TN wind generation data needed to be expedited. RGMO/FGMO with manual intervention response needed to be ensured

as per declaration. Relief realization through UFR and df/dt needed to be relooked by all the

constituents and necessary instructions should be communicated to the field offices to ensure the adequacy of defense mechanism.

6.3.2 EE, TANTRANSCO informed that action had been initiated for complete

automation for TN wind generation data.

6.3.3 MS I/c, SRPC observed that the status update on other issues also needed to be

furnished.

6.4 Over voltage settings of 400 kV lines

6.4.1 In earlier OCC/PCSC Meetings the matter regarding over voltage settings of 400

kV lines in the Region had been discussed. To ensure that critical trunk lines in the

Region did not trip on over voltage at the first instant, it was felt necessary to have

some gradation w.r.t. voltage and time.

6.4.2 MS I/c, SRPC informed that the updated scheme after taking into account the

comments had been communicated to the constituents for implementation

(Annexure-6D).

6.4.3 It was noted that Simhadri had implemented the settings, SR I, PGCIL had given

necessary instructions for implementation while SR II, PGCIL had almost

implemented the scheme. MS I/c SRPC requested the other utilities to implement

the scheme and communicate the same to SRPC/SRLDC once the scheme was

implemented.


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6.5 Issues related to NTPC Stations 6.5.1 Coal issues 6.5.1.1 Coal Status communicated to CEA needed to be looked into by NTPC. In the 85th

OCC meeting NTPC had informed that they would take up the issue with their

Corporate Office to ensure that data mismatch is avoided.

6.5.1.2 AGM, NTPC informed that they had taken up this issue with their Corporate

Office and the mismatch had been resolved.

6.5.2 Change of Technical Minimum of Ramagundam units:

It had been informed by NTPC (copy of letter dated 20th July 2013 at Annexure-6E) that they had revised the Technical Minimum of all units in Stage 1 & 2 to 1,553

MW temporarily for maintaining stable load considering the flame stability of the

units.

6.5.3 Stopping of Unit 5 of (500 MW) due to Short supply of Coal

6.5.3.1 NTPC vide letter dated 26th July 2013 (Letter copy at Annexure-6F) had informed

that the Ramagundam units are running at 70-75 % PLF due to short supply of

coal caused by rains in the mining area. Problems faced by machines due to wet

coal also were brought out. It was requested by NTPC that permission could be

granted to stop Unit 5 and maintain minimum load in other units.

6.5.3.2 GM I/c, NTPC Ramagundam informed that there was virtually no coal stock

available and presently Unit -1 & 3 were under maintenance/reserve shut down.

6.5.3.2 OCC suggested that the coal stock needed to be improved by all the stations.

6.6 Draft Procedure for Outage Planning by NLDC 6.6.1 It was noted that the approved procedure for Outage Planning by NLDC was

awaited.

6.6.3 SE (O), SRPC informed the forum as per the NLDC outage procedure, the outage

proposals for the month of October 2013 needed to be submitted by 3rdSeptember

2013. The formats in which the shutdown request is to be furnished is enclosed as

Annexure-6G. Information should be furnished in Excel format to the following E-

Mail Ids:

[email protected] [email protected]


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6.7 Implementation of RRF Mechanism 6.7.1 Hon’ble CERC had issued orders approving RRF procedure by NLDC which was

to be implemented from 15thJuly 2013.

6.7.2 MS I/c, SRPC said that the RRF mechanism had been implemented in SR and

accounts had been issued. He added that the complete timely information

regarding schedule and actual had to be submitted in respect of each of the

Pooling Stations. Other issues, if any, could be taken at the appropriate forum.

6.8 GRM Operation of Talcher-Kolar Link

6.8.1 KPTCL vide their letter dated 17th July 2013 had informed that M/S PRDCL had

taken the first set of measurements at various substations on 13th July 2013, and

second set of measurements would be taken on 20th July 2013 (Letter copy at

Annexure-6H).

6.8.2 CEE SLDC, KPTCL informed that the detailed analysis report had been received

from M/s PRDCL. The second set of measurements would be taken for further

analysis after duly conducting tripartite meeting between KPTCL, PGCIL and

PRDCL.

6.8.3 NPC/Implementation of Enquiry Committee

The First meeting of NPC was held on 15thApril 2013 and the Minutes of the

meeting were issued on 7thMay 2013.Need for timely action which was being

monitored at the highest level was emphasized. Second NPC meeting was held on

16th July 2013 and minutes were issued on 1st August 2013 .MS I/c SRPC informed

that certain issues were scheduled to be deliberated in the Special TCC Meeting to

be held on 21st August 2013.

6.9.1 Implementation of measures to prevent Grid Disturbance

6.9.1.1 Reactive Power Planning

6.9.1.1.1 STUs would submit to CEA the schemes required for Reactive Power

Management in their respective states in consultation with their respective

RPCs by 30th June 2013.

In the Special TCC Meeting held on 24th June 2013, the following had been

agreed:


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i) All the STUs would furnish the proposal to CEA before 30th June 2013 with a copy to SRPC. Proposal would cover the cost of estimate also.

ii) CTU would also furnish proposals for Reactor requirements in SR Grid with due consultations.

6.9.1.1.2 APGENCO, APTRANSCO, KSEB, TANTRANSCO and ED of Puducherry had

submitted their proposals. CEE, SLDC, KPTCL informed that M/s PRDCL had

agreed to furnish the detailed report on reactive power planning of Karnataka

system to KPTCL by 16th August 2013, The same would be verified by Planning

wing of KPTCL and the report would be submitted to SRPC and CEA.

6.9.1.1.3 MS I/c, SRPC requested other utilities to kindly furnish the details at the

earliest.

6.9.1.2 Ensuring proper functioning of UFRs and df/dt relays 6.9.1.2.1 RPCs would ensure healthiness of UFRs and df/dt relays through regular

inspection in a year of at least one-third number total relays in their respective

region. RPCs would also furnish the status of healthiness of UFRs and df/dt

relays installed in the region to CEA on a quarterly basis.

6.9.1.2.2 SE (O), SRPC requested all the constituents to furnish the details of all

UFR/df/dt relays along with details of the contact persons of the substations

where they are installed.

6.9.2 Reporting the Status of implementation of the recommendations of the Enquiry Committee All RPCs are requested to update and forward the status of implementation of

recommendations of the Enquiry Committee on Grid Disturbances on 30th and

31st July 2012 to CEA in the prescribed format on fortnightly basis regularly i.e.

the status as on last day of the month to be forwarded by the 3rd day of the

following month and that as on 15th of the month to be forwarded by 17th of the

month. All members agreed to submit the above information on fortnightly basis

through RPCs.

MS I/c, SRPC requested all the constituents to update and forward the status in a

timely manner.


17

6.9.3 Flat under frequency relays based automatic load shedding schemes 6.9.3.1 First stage of automatic load shedding through UFRs would be set at 49.2 Hz.

(against 48.8 Hz. in NEW grid and 49.0 Hz. in SR Grid) at present in all the

Regions. Total number of stages for automatic shedding of loads through UFRs

whether existing three or proposed four with a gap of 0.2 Hz between two

consecutive stages-and the quantum of load to be shed at each level would be

discussed by the RPCs internally with their constituents and revert back to NPC

at the next meeting, which would be convened within two months.

6.9.3.2 In the second meeting of National Power Committee was held on 16th July 2013

at New Delhi, the matter regarding quantum of loads under AUFLS was

discussed. After discussions it had been agreed that there would be four stages

for AUFLS starting with 49.2 Hz. The various stages for AUFLS operation are

49.2 Hz, 49 Hz, 48.8 Hz and 48.6 Hz. The quantum of loads at each stage has

been calculated as per the Zhalte Committee Report. In view of the NPC decision

to have 4 stages of AUFLS, Southern Regional Utilities would also need to carry

out necessary changes so as to have 4 stages of AUFLS as decided in the NPC

Meeting.

6.9.3.3 MS I/c, SRPC informed that SR constituents were also required to implement four

stages of AUFLS as per NPC decision. The present quantum was required to be

re computed for the four stages. The issue was also scheduled to be deliberated

in the TCC meeting scheduled for 21st August 2013.

6.9.4 Review of Zone 3 Philosophy 6.9.4.1 RPCs to advise their STUs to furnish all such data to Director (Operation), PGCIL

within three weeks for further necessary action by them.

In the special TCC Meeting held on 24th June 2013, the following was noted:

i) Power Grid informed that some of the information was pending from the State Utilities. The issue was being dealt by their Corporate Office.

ii) POWERGRID was requested to kindly furnish the details of pending data so that the matter could be taken up with the concerned utilities.

In the 85th OCC meeting it had been noted that PGCIL had furnished the list of

lines where the data yet to be furnished.


18

6.9.4.2 DGM, SRTS II, PGCIL informed that some of the data from BTPS, NPCIL etc

was pending and the issue was being followed up.

6.9.4.3 MS I/c, SRPC informed that this issue was to be deliberated in the Special TCC

meeting (21st August 2013). He requested the utilities to submit the pending

information to PGCIL.

6.9.5 Implementation of Demand management Scheme (IEGC 5.4), Grid Security Expert System and Demand Estimation

6.9.5.1 Issues raised by RPCs would be taken into consideration or clarified by PGCIL to

the satisfaction of the constituents at the time of detailed discussions for fine

tuning of the schemes at the level of RPC. The issue might be referred to NPC

later on if considered necessary by the RPCs.

In the Special TCC Meeting held on 24th June 2013, the following was agreed:

i) All the States would furnish the data to POWERGRID (LD&C, Gurgaon) within one week time.

ii) Issues like grouping, differentiation in ADMS and GSES could also be raised for seeking clarity.

iii) One to one meeting to be carried out by POWERGRID at the State Head Quarters at an early date.

iv) Subsequently a common meeting could be held at SRPC Bangalore for finalization of the scheme.

v) SRPC would address a communication to Secretary, CERC expressing that the scheme was under preliminary discussion stage. Detailed Engineering could thus only be carried out after thorough deliberations with State Utilities. Subsequently only the scheme could be implemented.

vi) The concern about the State Utilities would also be put up to NPC.

6.9.5.2 In the 85th OCC Meeting PGCIL had informed that they were awaiting the data in

required format.

6.9.5.3 DE, APTRANSCO informed that preliminary meeting with PGCIL had already

taken place. He added that as per the scheme, 60 groups independent of

protection schemes, were required to be identified. To identify 60 independent

groups, overlap was inevitable. He also enquired whether the backing down

signal was being extended to ISGS/CGS stations since state generators were

apprehensive in this regard.


19

6.9.5.4 CEE, LDC, KPTCL informed that the basic data details had been furnished by

protection wing to Corporate Office and the same was under validation.

6.9.5.5 MS I/c, SRPC requested the concerned utilities to complete the meetings with

PGCIL, which would enable them to comprehend the scheme. Other relevant

issues could be taken up at the appropriate forum.

6.9.6 Training and Certification of System Operators 6.9.6.1 NPC had opined that certification of System Operators be made mandatory

through amendment of relevant regulations notified by CEA and CERC.

6.9.6.2 NPTI would be conducting a one week (6 days) training program on “Power

System Reliability” at Corporate Office Faridabad and PSTI Bangalore. Six

batches had been planned from August 2013 to January 2014. Nomination on

Training Program on Power System Reliability had been sought

6.9.6.3 AGM, SRLDC informed that six batches had been planned from August 13 to Jan

14. The course shall equip the Certified System Operators with necessary inputs

to take-up the Specialist Level Certification Examination in “Power System

Reliability” tentatively scheduled to be conducted during the month of March

2014.

6.9.7 Ring Fencing of Load Despatch Centers 6.9.7.1 It was decided that RPCs would advise their States to furnish the Status of

separation of load dispatching activity from other activities financially and

administratively with a view to make their load dispatch centers independent and

impartial. The information would be forwarded by RPCs to CEA before next NPC

meeting.

6.9.7.2 The status update was noted in the Special TCC of SRPC Meeting held on 24th

June 2013.

6.9.7.3 It was noted that this issue would be discussed in the Special TCC meeting to

be held on 21st August 2013.

6.9.8 Implementation of CEA Regulations 6.9.8.1 RPCs were requested to examine the possible methods to check violations and

ensure implementation of CEA Regulation and forward the inputs to CEA before

next NPC meeting for consideration.


20

The following was noted in the Special TCC of SRPC Meeting held on 24th June

2013:

i) It was observed that Regulations were diverse in nature and therefore a separate Implementing Agency could monitor and ensure compliance of the Regulations.

ii) SRLDC stated that the provisions of the Regulations such as submission of DR & EL Reports etc were not being fully complied with at present by some of the utilities.

6.9.8.2 In the 85th OCC Meeting MS, SRPC had requested the constituents to revert back

on any Voltage Collapse Prediction Relays.

6.9.8.3 It was noted that the issue would be discussed in the Special TCC meeting to be

held on 21st August 2013.

6.10 Generation level at RTPS Unit VIII

KPCL informed that the unit was still being run half load i.e. 128 MW and by

December 2013, the issue was likely to be resolved.

6.11 Energy Generation data Management from Renewable Energy Sources

Energy Generation from RES connected to Grid is being collected by CEA from

SLDCs from April 2012 onwards. It had been decided that CEA would bring out a

monthly report of RES containing data of generation in MU from RES Month-wise,

State-wise, Sector-wise and Category-wise etc including details like Peak Generation

from RES, time of occurrence etc. In this regard, CEA had already requested SLDCs

to nominate Nodal Officers for the above purpose. It was noted that only few States

had responded. A meeting was held on 31st May 2013 with Nodal Officers to discuss

this issue. CEA had also requested to put this issue as an agenda item of OCC.

6.12 Stranded Capacity

In the 83rd OCC Meeting, MS I/c, SRPC informed that a Committee headed by

Chairperson, CEA with two JS from MoP as Members to explore the possibility of

utilizing Stranded Capacity had been set up. The Report in this regard had been

prepared by CEA.


21

6.13 Islanding Scheme: Priority for Railways in the matter of Restoration of Supply 6.13.1 In the letter received from Chief Electrical Engineer, Southern Railway regarding

development of Islanding Scheme, it had been stated that priority is to be given to

Railways in the matter of restoration of supply. In the 85th OCC Meeting it had

been noted that with representation of Railways, the schemes could be fine-tuned

and it could be ensured that all the traction sub stations are included in BSRP. A

Workshop was organized by SRLDC on 24th July 2013 at SRPC to deliberate on

this issue. The Minutes of the Meeting had also been issued.

6.13.2 DE, APTRANSCO informed that Meeting was held with South Central Railways.

Out of 40 traction sub stations three stations had been given A+ priority(Supply

would be extended from hydro stations), 17 stations had been given A priority and

balance 20 stations had been given B priority. East Coast and Southern Railway

had furnished list giving all the stations as A priority and APTRANSCO had

requested a separate meeting between 16th to 20th August to sort out the priority

issues.

6.13.3 EE, TANTRANSCO informed that the meeting with Railway officials had been held

at SLDC TANTRANSCO and the relevant information had been given to the

Railways. Railways were to update their grid map and would revert back with their

scheme which would be further deliberated/finalized before putting up to

SRLDC/SRPC. Railway officials were also attending the Black Start Workshop

scheduled on 27th Aug 2013 at Basin Bridge, Chennai.

6.13.4 MS I/c, SRPC said that KPTCL, KSEB & ED, Puducherry were also required to

initiate Black Start deliberation with the concerned Railway authorities.

6.14 Pollution Mapping of Southern Region.

In the 85th OCC Meeting it was noted that in the 22nd Meeting of SRPC held on 18th

May 2013 at Bangalore the committee had concurred for Pollution Mapping in SR

and for one time reimbursement of project cost (Rs. 3 Crores) to PGCIL from the

beneficiaries. SRTS II, PGCIL informed that two coordinators were required from

State Transco and requested to furnish the details of coordinators within seven days

under intimation to SRPC.


22

It was noted that TANTRANSCO had furnished the details of Coordinators. Other

state TRANSCOs were requested to kindly furnish the details at the earliest.

6.15 Performance Audit on supply and pricing of Natural gas. SRPC vide letter dated 02.07.2013 (Annexure-6 I) had forwarded to all the

constituents a copy of letter dated 11th June 2013 received from Ministry of Power

regarding Performance of Audit on supply and pricing of natural gas. Audit had

sought some information as mentioned in the enclosed letter. Vide reminder letter

dated 29th July 2013 Director (GM) (Letter copy at Annexure-6 J) had requested that

the material/information on the above subject may please be furnished immediately

as the matter was pending for a long time.

MS I/c, SRPC informed that APTRANSCO had furnished the necessary details. He

requested other concerned utilities are requested to furnish the required information.

6.16 Technical Minimum of Generators in Southern Region

6.16.1 In the Special Meeting held on 25th July 2013 to deliberate on RGMO/MVAAR

absorption issues it was agreed to discuss Technical Minimum of Generators.

6.16.2 SRLDC pointed out that in some cases, DC was less than technical minimum for

NLC stations and hence a comprehensive study was required.

6.16.3 MS I/c, SRPC suggested that all generators may furnish their technical minimum

details along with justification/reasons which could be deliberated in the next OCC

meeting.

8. GRID FREQUENCY

8.1 High frequency

8.1.1 High frequency on 31st July 2013 8.1.1.1 SRPC secretariat made a presentation on high frequency conditions on 31st July

2013 (Annexure-8A). The observations/ recommendations are as given below:

ISGS Thermal stations had given good response of around 331 MW (8%)

AP, KAR & TN Thermal responses are required to be optimized.

AP, KER & TN Hydro response are required to be optimized.


23

TN wind generation variations required to be balanced out by other sources(Hydro, Thermal & UI)

TN non updated SCADA values could lead to wrong decisions

Inter Regional UI to be zero or exporting during high frequency.(in case frequency differential permits)

Sudden reductions in drawals specifically by AP & TN during high frequency need to be addressed.

SRLDC could suspend violation messages for overdrawal at frequency > 50.1 Hz, subject to other operating parameters being within limits.

Frequency bias messages could be issued by SRLDC to increase the drawls in case, frequency remains high on sustained basis.

Conservation of Coal so as to build up coal stock is required.

Hydro reserves to be valued comparable to other resources.

All fuel resources to be conserved.

8.1.1.2 SRLDC also gave a presentation on the issues (Annexure-8B).

8.1.1.3 Some of the issues raised by the constituents are given below:

APTRANSCO observed that sudden variations in load upto 2000 MW were being observed and it was very difficult to forecast loads. Planning was getting difficult with the demand variability intensity.

KPTCL pointed out that due to embedded generators, their net schedule was getting minimized and hence they were forced to under draw.

KSEB stated that Idukki and Sabarigiri reservoirs in the state were full and hence they were forced to generate.

TANTRANSCO stated that they would take up the SCADA and the thermal reduction issues with the concerned utilities.

8.1.1.4 MS I/c, SRPC said that the sustained operation above 50.1 Hz was uneconomic

while above 50.2 Hz was also violation of IEGC limits. He requested the

constituents to take appropriate steps to avoid high frequency operation.

8.1.2 High Frequency Grid Operation It was noted that the Regional Grid had operated above 50.2 Hz for 9.58 % of the

time, during the month of July 2013. It was also noted that the frequency on

some of the days was more than 50.2 Hz for considerable periods as shown

below:


24

Date Percentage of time of frequency

50.0 Hz &< 50.2 Hz More than 50.2 Hz

18.07.2013 40.14 10.35 19.07.2013 40.28 23.75 20.07.2013 39.93 16.04 23.07.2013 57.85 16.04 24.07.2013 53.48 20.69 26.07.2013 49.51 14.51 27.07.2013 51.94 18.54 28.07.2013 61.46 21.18 29.07.2013 66.46 14.44 30.07.2013 51.59 29.93

8.1.2 Constituents were advised to kindly avoid uneconomic operation at high

frequencies.

8.1.3 High frequency excursions w.r.t. 5.2 (j) of IEGC during load change over and remedial measures to arrest such instances

8.1.3.1 SRLDC presented the Summary statement of under drawal & Over Injection

messages on real-time.

State No. of Messages Andhra Pradesh 78 Karnataka 45 Kerala 6 Tamil Nadu 220 Puducherry 7 Total 356

These messages are automatically generated in SCADA

when Under Drawal is more than 150 MW in the last 5 minute while f > 50.2 or when Under Drawal is more than 250 MW in the last 5 minute while f < 50.2

8.1.3.2 SRLDC pointed out that this issue was regularly being followed up and requested

the following remedial measures to arrest high frequency operation in the Grid.

Implementation of staggered Load changeover by the constituents.

Moderating own generation

Restricted Governor Mode of Operation of all eligible machines to be in place.


25

Proper load management to prevent the sharp rise in frequency

Exploring the possibility of running in pump mode for two to three blocks at Kadamparai and Srisailam

Planned and advance intimation for surrender of ISGS.

8.1.3.3 MS I/c, SRPC observed that backing down of state generation was also to be

examined, since at times sustained under drawal at high frequency was being

noted.

8.2 Low Frequency

8.2.1 It was noted that the frequency of grid operation was at times in the lower range

of IEGC.

The grid had operated below IEGC range for 2.08% of the time during the month

of July 2013, as compared to 6.94 % during July 2012 (IEGC range 49.5 to 50.2

Hz) and 3.60 % during June 2013.It was also noted that the frequency on some

of the days was less than 49.7 Hz for significant duration as shown below:

8.2.2 AGM, SRLDC stated that proper demand side management measures had to be

taken care by constituents to curtail low frequency operation. Details of

caution/violation messages issued by SRLDC to the constituents during the

month of July 2013 are furnished at Annexure-8C. Details of 12% violation

messages pertaining to over drawal /under injection while the frequency was

below 49.8 Hz over a time block are furnished in Annexure-8D.

8.2.3 OCC placed on record appreciation for Chief Engineer, SLDC KPTCL for not

having received any violation message during the month.

Date

Percentage of time of frequency

49.2 Hz &< 49.5 Hz

49.5 Hz &< 49.7 Hz

01.07.2013 0.00 3.96 03.07.2013 0.07 2.01 05.07.2013 0.00 4.24 06.07.2013 0.00 4.51 11.07.2013 0.00 4.79 12.07.2013 0.00 4.79 17.07.2013 0.35 1.53


26

8.2.4 DE, APTRANSCO informed that the load shedding around 732 MU up to 2,594

MW was carried out in AP. Purchases of more than 525 MU had been made from

other states/regions. Scheduled load shedding in Hyderabad, Thirupathi, Vizag,

Warangal, Corporations and District Head Quarters had been lifted from 5th June

2013. Two Hours (two spells) Scheduled load shedding in Towns and

Municipalities, Mandal HQs &6 Hours Scheduled load shedding in rural areas had

been continuing from 6th June 2013.As per Hon’ble APERC orders on R&C

measures dated 31st July 2013, Restriction &Control measures completely are

lifted from 01.08.2013.

8.2.5 CEE, SLDC, KPTCL said that load shedding around 451 MU upto 1,350 MW had

been carried out in Karnataka. Purchases of around 2 MU were also made from

other States/Regions.

8.2.6 DE, KSEB informed that load shedding around 12 MU upto 350 MW had been

carried out in Kerala. Purchases of more than 137 MU were made from other

States/Regions. He informed that no scheduled load shedding had been carried

out during July 2013.

8.2.7 EE, TANTRANSCO informed that load shedding around 208 MU upto 610 MW

had been carried out in Tamil Nadu. Purchases of more than 681 MU were made

from other States/Regions. Scheduled load shedding in Chennai had been

continuing at two hours (in two spells between 0800 to 1800 hrs) and 3 hours

(between 0600 to 1800 hrs) for Urban and Rural areas. 40% Power cut continued

for HT & Commercial consumers. In addition 10% Peak Hour restrictions in

respect of HT & Commercial consumers also continued during July 13. The

restrictions had subsequently been relaxed.

8.2.8 MS I/c, SRPC requested the constituents to plan the Load Generation Balance

block-wise to avoid any operation below 49.7Hz.

8.3 SRLDC presented the Frequency Histogram & Frequency Duration Curve

(Annexure-8E) for July 2013.


27

9. VOLTAGE PROFILE

9.1 Low voltage 9.1.1 It was noted that the following nodes were facing low voltages:

Station Min Voltage in kV

Average duration per day When V <390 kV

Bangalore 380 162 Trichur 377 83 Palakkad 379 70 Udumalpet 374 207 Cochin 378 77 Trivandrum 370 165

9.1.2 States were to provide Under Voltage relays in some of the low voltage nodes in

their control area as given below:

State Under Voltage relay required at 220kV substations

Andhra Pradesh (Chittoor area)

Chittur, Palamaneru, Kalkiri, Renigunta, Kodur, Rajampet

Karnataka(Bangalore area, Mysore area)

Bidadi, Somanahalli, Subramanyapura, HSR layout, Naganathpura, Hoody, Hebbal, Whitefield, HAL, Nelamangala, Peenya, D.B.Pura, Antharasanahally, Dobspet, Basthipura, Hootagalli, Tubinkere, AStation, EDC compound, Kunigal and Kadakola

Kerala (North Kerala)

Kalamassery, Palakkad, Madakkathara, Areakode, Kaniyampet, Shornur, Malaparamba, Vadakara, Kanjirode, Talaparamba, Kasarkode, Pothencode, Edappan, Kundara

Tamil Nadu (Chennai area)

Siruseri, KITS Park, SP Koil, Sriperumbudur, Gummidipoondi, Koratur, Koyambedu, Kadaperi, Mamambankam, Taramani, Almatti, Manali, Oragadam, Kil Pauk, Todiyarpet, Mylapore

In earlier OCC following had been deliberated/noted: Installation of under voltage (U/V) relays was agreed in principle by the

constituents in the SRPC meetings. SRPC & SRLDC desired that some written communication needed to come from states regarding implementation progress of the U/V relays.

In 82nd OCCM, after discussions, it was agreed that the action plan for implementation of U/V relays would be furnished by the constituents within 15 days.

9.1.3 Constituents pointed out that number of reactive compensation including

capacitor installation were being planned and the scheme needed to be relooked.

9.1.4 SRPC & SRLDC pointed out that the U/V Relays had been agreed in principle in

SRPC Meeting and hence the implementation schedule needed to be finalized at

the earliest.


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9.1.5 Installation of Shunt Capacitors

Sl. No. Description AP KAR KER TN Pudu Total

1. Total Installed as on 31.03.2013 6593.40 4459.2

0 995.00 4055.90 77.017 16180.51

2. Additional Requirement during 2013-14 55.00 81.44 10.00 2.60 -- 149.04

3. Actual Addition during 2013-14 upto 31.07.2013 0 0 0 35.00 0 35.00

4. Balance 55.00 81.44 10 0 0 146.44*

* Installation of capacitors in Tamil Nadu is more than requirement.

9.2 High Voltage

9.2.1 It was noted that number of lines had tripped/hand tripped due to high voltage.

9.2.2 SRLDC presented the following table, highlighting the severity of the problem:

Station Max Voltage in kV

Average duration per day When V > 420 kV

Vijayawada 438 1377 N’Sagar 434 898 Hyderabad 438 1026 Gooty 432 1075 Kurnool 443 1418 Khammam 435 1152 Vemagiri 431 1004 Hiriyur 432 493 Guttur 434 971 Raichur 433 964 Kaiga 427 453 Narendra 434 1062

MVAR absorption details by generating stations near high voltage zones in some

specific instances (Annexure-9A) were also presented.

9.2.3 MS I/c, SRPC said that Tap Position optimization recommended in the Meeting of

RGMO/MVAR held on 25th July 2013 was required to be implemented. The status

in this regard was required to be communicated to SRPC/SRLDC. The issue

would be further deliberated in the Special TCC Meeting scheduled for 21st

August 2013.Information regarding MVAR interchange had to be furnished to

[email protected].


29

9.2.4 SRLDC stated out that all Tap changes had to be carried out before 31st August.

Else, reasons for not completing the exercise are to be furnished.

9.2.5 Hon’ble CERC Order dated 23.12.2009 merited attention in this regard. It had

been stated in the Order that all agencies needed to provide required reactive

compensation thus avoiding the need for exchange of reactive power to/from

ISTS and maintain ISTS voltage within specific range.

9.2.6 Following remedial measures had been reiterated:

Maximize the MVAR absorption by generators near high voltage zones Concerted action/follow up by SLDC was required at Vemagiri complex, VTPS, KTPS, Srisailam, Kaiga, UPCL and Raichur.

Operation of machines in synchronous condenser mode wherever feasible

Installation of Bus reactors as recommended by Standing Committee on Power System.

Optimizing Tap Position of all GT’s / ICTs to ensure that the Grid Voltages remain close to 400 kV. Tap position of new generating units (before COD) were also required to be optimized.

Optimising GT Tap position to ensure that the Grid Voltages remain close to 220/230 kV or as applicable (where the generating stations were feeding to the grid).

Capacitors Banks to be taken out.

Line opening would be the last resort by SRLDC after receipt of message from the constituents.

9.3 Status of Bus/Line Reactors commissioning at Guttur 9.3.1 KPTCL had informed that the matter regarding shifting of Hoody line reactor to

Guttur was still under examination. Since this reactor was of 1994 make, they

were apprehensive that it could get damaged during transportation.

9.3.2 SRLDC had reiterated that Guttur should have both bus and line reactor. It was

reminded that the Standing Committee on Power System Planning had approved

2 reactors at Guttur.

9.4 Status of commissioning of Balance Bus & Line Reactors as agreed in the Standing Committee meeting

9.4.1 The updated information on schedule of commissioning of Reactors as agreed in

the Standing Committee on Power System Planning of Southern Region is

furnished at Annexure - 9B.


30

9.4.2 CEE, SLDC, KPTCL informed that the reactors at Raichur (KPCL), Talaguppa,

Nelamangala and Hoody had been received. Reactors for Guttur were awaited.

The reactors were likely to be commissioned by December 2013.

9.5 High Voltage at Vemagiri Complex

9.5.1 In various forums, SRLDC had raised concern over high voltage issues in respect

of Vemagiri complex due to inadequate absorption of reactive power by the

generating units, non-nominal tap setting of Generator Transformer and non-

utilization of 80 MVAR bus reactors at GMR Extension plant. SRLDC had stated

that many meetings were conducted with AP on high voltage issues at various

locations (specifically at Vemagiri Complex) under APSLDC. There has been no

noticeable improvement and AP has not been able to implement SRLDC

instructions to control over voltage. In case the voltage profiles are not improved

SRLDC may be constrained to go for petition.

9.5.2 In the 21st TCC meeting held on 17th May 2013, APTRANSCO had informed that

the installation of Bus Reactor at Vemagiri would be completed in two months.

GMR Plant was not generating due to fuel shortage.

9.6 High Voltage issue at Kaiga/Hassan 9.6.1 NPCIL vide letter dated 13th June 2013 had expressed concern about the high

voltage problem with Kaiga 400 kV Switchyard highlighting the need for

implementation of 63 MVAR Bus Reactor at Guttur which was essential for the

desired Voltage Stability. MS SRPC vide letter dated 20th June 2013 had

communicated to NPCIL in this regard.

9.6.2 It had been agreed in the Special TCC meeting held on 24th June 2013 that higher

capacity reactor requirement at Kaiga and additional reactor at 400 kV Hassan

Substation would be recommended to the Standing Committee. MS SRPC vide

letter dated 20th June 2013 had communicated to NPCIL in this regard.

10. SYSTEM SECURITY MEASURES

10.1 U/F & df/dt Relays Schemes 10.1.1 Updated AUFR / df/dt quantum implemented/expected by states at various

stages is furnished as Annexure-10A.


31

10.1.2 However, as contained in the ROP w.r.t. Petition 263/MP/2012, the loads

available for relief in the identified feeders were far below the value declared by

the constituents. It was noted that Hon’ble Commission had directed that the

issue be discussed in RPC level meeting to decode the quantum of load which

should be increased to give desired result in a time bound manner. It was also

noted that quarterly report had to be submitted to CERC by SRLDC. The

adequate load relief issue was also deliberated in PCC Meeting held on

27.03.2013 wherein all constituents had agreed to continue with present quantum

of relief proposed earlier i.e. 9,912 MW. Above relief shall be ensured based on

average loading of the feeder. Subsequently RoP on hearing dated 09.04.2013

w.r.t Petition 263/MP/2012 had also been issued and the Commission had

reserved the Order.

10.1.3 It was noted that Andhra Pradesh only had implemented the additional stage for

df/dt protection scheme and other states were in various stages of

implementation. KPTCL had informed that regarding df/dt setting the existing

relays were not suitable to set multiple settings, they were inviting tender to meet

the requirement which may require three months.

10.1.4 Details of Load Relief obtained through various defense schemes are enclosed

as Annexure-10B.

10.1.5 As per clause 9(2) of CEA (Grid Standards) Regulations, 2010, all constituents

shall submit a detailed report of operation of AUFR at different frequencies to

SRLDC and SRPC on daily basis. It was noted that KSEB and PED were only

submitting the daily report of operation of relays.

10.2 Automatic Demand Side Management Scheme (Petition No. 250/MP/2012) & GSES (Petition No. 265/MP/2012)

10.2.1 Automatic Demand Management Scheme in line with clause 5.4.2 (d) of the

IEGC was to be provided by all the constituents by 01.01.2011.

10.2.2 With respect to Petition (No. 250/MP/2012) Hon'ble CERC had issued an order

dated 14th January 2013 & RoP for 07.03.2013. Para 4 of RoP is reproduced

below:


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“In response to Commission’s query whether both Grid Security Expert System (GSES) and Automatic Demand Management scheme are required or it may be duplication of facilities, the representative of the NRLDC submitted that both the schemes are separate and need to be implemented with the GSES would be operated from SLDC and RLDC level and would be at higher voltage level, Automatic Demand Management Scheme (ADMS) will be at 11 kV, 33 kV feeder level. The objective of ADMS is to control the demand as per availability and at the same time objective of GSES is for action when action by ADMS is not sufficient.”

10.2.3 With respect to Petition (No. 265/MP/2012) Hon'ble CERC had issued RoP on

10th January 2013 and subsequently a Special TCC was held on 11th and 12th

February 2013 and views were communicated to Hon’ble CERC. CERC had

passed order dated 5th March 2013. Para 8 (a) & (b) are reproduced below.

“8. The Commission directed to CTU to submit the following on affidavit by 16.4.2013:

(a) Clear demarcation between Automatic Demand Management Scheme and GSES, indicating voltage level at which both the schemes will operate; and

(b) Duplicity, if any, between the two schemes, in general and particularly with reference to optic fibre network proposed in Unified Load Despatch and Communication scheme.”

10.3 Status Review of Automatic Load Disconnection Scheme for overdrawing constituents (IEGC clause 5.4.2 (c))

It was noted that SRPC in its 14th meeting held on 27th August 2010 had agreed to

implement Automatic Load Disconnection Scheme for overdrawing constituents with

the following relief:

Sl. No. Constituents Load Relief 1 APTRANSCO 450 MW 2 KPTCL 350 MW 3 KSEB 125 MW 4 TNEB 650 MW 5 Puducherry 25 MW

The issue was noted for compliance by the concerned utilities.

10.4 Grouping of loads (IEGC clause 5.4.2 (e)) 10.4.1 As per IEGC, to maintain the frequency within stipulated band and also to ensure

network security, the interruptible loads were to be arranged in four groups of

loads, This was for the purpose of scheduled power cuts/load shedding, loads for


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unscheduled load shedding, loads to be shed through UF relays, df/dt relays and

loads to be shed under any SPS scheme. These loads are to be grouped in such

a manner that there is no overlapping between different groups of loads.

10.4.2 The issue was noted for compliance by the concerned utilities.

10.5 Tripping Details/Reports 10.5.1 AGM, SRLDC informed that SRLDC was not getting tripping information/data

within 24 hrs as per IEGC and sometimes the information from both the ends was

not being received. Also at times line details only were being received without

DR&EL details. He also informed that they were unable to analyze the event due

to non-receipt of details of tripping in time. The status of information being

received is enclosed as Annexure-10C.

10.5.2 SRLDC stated that all tripping related information would be furnished to the

following E-mail addresses:

[email protected] ; [email protected] [email protected] ; [email protected]

FIR would need to be furnished within 10 to 20 minutes of the incident. Detailed

trip analysis report along with EL and DR and remedial measures would be

furnished within 24 hours in line with IEGC/CEA regulations. Once SRLDC

develops its web based program it would conduct a workshop to familiarize the

utilities of the usage of the application.

10.5.3 SR-I, PGCIL expressed their concern over non functioning of SRLDC portal to

upload tripping details. Though they were sending the details through E-mails,

sometimes they were being insisted through portal also by SRLDC.

10.5.4 AGM, SRLDC said that all tripping details should be uploaded to SRLDC web

portal. In case any constituent/utility was unable to upload to the web portal,

tripping related information may be sent to mails IDs mentioned above.

10.6 Declaration of availability and healthiness of various protection / defense mechanism

10.6.1 AGM, SRLDC said that constituents were required to furnish the healthiness

certificates for protection system regularly.


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10.6.2 MS I/c, SRPC noted that healthiness certificates and other reports were being

requested as per the directives of higher bodies.

10.7 Special Protection Schemes 10.7.1 SPS for 400 kV Vijayawada-Nellore D/C line

In the 84th OCC Meeting it was informed by APTRANSCO that as there was no

generation by IPPs in Vemagiri Complex the IPPS were not showing interest in

the implementation. After deliberations it was suggested that if IPPs did not

agree, the signal could be wired for tripping of the breakers at Vemagiri end.

10.7.2 Status of SPS under implementation 10.7.2.1 Status of ongoing SPS scheme is enclosed as Annexure-10D. Respective

utilities were requested to expedite the same.

10.8 Status of Contingency Plan by TN to overcome variability of wind generation

10.8.1 In the meeting held on 7th June 2013 at SRPC, Bangalore TANTRANSCO agreed

to implement SPS for tripping of one ICT at 400 kV Tirunelveli and Madurai and

necessary details of the scheme would be furnished within 15 days.

TANTRANSCO had also agreed to take up the LVRT settings and Reactive

Power Compensation issues with wind generators. Study of SPS requirement in

the contingency of tripping of any one of the 230 kV lines terminating at

Tirunelveli etc. was also to be undertaken. In the meeting held at Kudankulam on

22nd July 2013 the urgent need for having the scheme was emphasized on the

view that wind generation was currently at a high level coupled with injection from

KKNPP during August 2013.

10.8.2 MS I/c, SRPC requested TANTRANSCO to kindly expedite the identified

measures and keep SRLDC/SRPC updated on the progress.

11. SCADA & COMMUNICATION ISSUES 11.1 In the Meeting, SRLDC presented the status of data, voice and internet

communication and pending field inputs. Details enclosed as Annexure-11A.

11.2 AGM, SRLDC informed that RTU/SAS data from Jindal Generating Station had

started coming to SRLDC.


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11.3 SRLDC also pointed out the following:

As decided in the 22nd SRPC meeting, CTU would revert back with the details of suitable communication arrangements for enabling availability of Talcher Stage II data to SRLDC directly. PGCIL to furnish the update.

Stand by Data channel from NTECL Vallur to SRLDC. Voice communication which was out of order to be rectified. Unit II should be commissioned after assuring the availability of the communication channel.

Exercise for validation for SCADA data between RLDC and SLDCs to be carried out. SLDCs requested to get in touch with SRLDC ULDC wing.

11.4 DGM, SR II PGCIL informed that w.r.t. Talcher Stage II data availability at SRLDC,

the communication link had already been activated and requested SRLDC to

coordinate with ERLDC to ensure data availability.

11.5 AGM, SRLDC informed that the pending field inputs had reduced from about 1000

to 200. He also expressed concern over the pending field inputs from new units.

He added that the copy of PPA had also to be furnished to SRLDC for new units.

12. PHYSICAL AND CYBER SECURITY/CRISIS MANAGEMENT PLAN/BLACK START PROCEDURE

12.1 Physical and Cyber Security 12.1.1 Status update on Crisis Management Plan(C&DMP) of Power Sector is to be

furnished every quarter. The information regarding Cyber Security was to be

furnished to Chief Engineer, DPD, CEA, Sewa Bhavan, New Delhi-110066.

Report on Physical Security, other Mock Drills for CMP, Mock Drill for Black Start

Restoration was to be furnished Chief Engineer, DMLF, CEA, Sewa Bhavan, New

Delhi-110066. A copy of the reports was to be sent to SRPC Secretariat

([email protected] and [email protected]).The practices being

followed in respect of Cyber Security/Physical Security/CMP/Mock Drills w.r.t.

Black Start was also required to be communicated. The issue had been taken up

with the utilities vide letters dated 25th June 2013 and 15th July 2013 but only few

responses have been received. SRPC letter dated 18th July 2013 enclosing the E-

mail received from CEA in this regard is at Annexure-12A.

12.1.2 The E-mail received from NTPC, enclosing AGM (NTPC) letter dated 25.02.2013

on CERT-Thermal Activities-CMP is at Annexure-12B. Some of the salient points

are mentioned below:


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The Crisis Management plan drawn by CERT-In, Department of IT, Ministry of Communication & IT was forwarded by Ministry of Power for implementation in Power Sector Organizations.

Ministry of Power vide letter No. F.1/10/2010-IT(Vol-I) dtd 13th Dec 2010 had constituted CERT-Thermal(Nodal agency –NTPC), CERT-Hydro(Nodal agency-NHPC) and CERT Transmission(Nodal agency-PGCIL)to guide the other Thermal Utilities in States in preparing and implementing Crisis Management Plan, to counter Cyber Security threats. The State Utilities were requested to prepare their own Crisis Management Plan (CMP) and be in touch with the Nodal Agencies i.e. NTPC, NHPC & PGCIL and CERT-In for necessary actions.

The names and address of the Nodal officers are as under:

Nodal Officer, CERT (Hydro): Shri S R Roy, Ex. Director (IT&C) NHPC Ltd. Sector 33, Faridabad (Haryana)

Ph: 0129-2277894, Fax: 0129-2278430

Nodal Officer, CERT (Thermal):

Shri A K Ajhala, AGM (IT), NTPC Ltd., Engg. Office Complex, Plot No. 8A, Sec-24, Noida (UP)

Nodal Officer, CERT (Transmission) Shri Pankaj Kumar, ED, (IT) PGCIL, Saudamini, Plot No.2, Sec-29, Gurgaon

Ph: 0124-2571809, Fax: 0124-2571809/2571802

CERT-In: Dr. Gulshan Rai,

Director General (ICERT)

Electronic Niketan, CGO Complex, New Delhi

Ph: 011-24368544 (O) Fax: 011-24366806

12.1.3 NTPC vide their E-Mail (endorsing the letter) communicated that they had been

awaiting coordinators from State Utilities and had requested CEA and MoP to get

the details of Thermal Utilities across. However, in order to initiate the activities in

this area each organization is desired to;

i) Nominate a Chief Information Security Officer for the Organization (CISO).

ii) To create an incident response Team identifying Nodal Officers to handle Cyber Security incidents at each Entity/Plan Levels.

iii) To draw IT security Policy and Framework for the respective organization.


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iv) To get vulnerability assessment audit exercise (from Cert-in empanelled auditors, Min of communication & IT) to further implement information Security Management System (ISMS) in line with ISO 27001 Information Security Standards.

v) To define Contingency Plan w.r.t. Business Continuity in order to counteract interruptions.

vi) To establish Disaster Recovery Plan.

12.1.4 SE (O), SRPC informed that Utilities/constituents may please contact respective

Nodal agencies for any queries and clarifications with respect to Cyber Security.

Other details like Physical security, Mock drill for CMP, Mock drill for Black start

Restoration are to be sent in the enclosed format (Annexure-12C).

12.2 Black Start Procedure 12.2.1 Updated information on Mock exercise is enclosed at Annexure-12D.

Constituents were requested to furnish the schedule for July –Dec 2013.

12.2.2 AGM, SRLDC informed that Black start Mock Exercise of HVDC Gazuwaka AC

Bypass had been completed successfully on 4th Aug 2013. All constituents were

requested to present/share their experience and practical difficulties.

12.2.3 Synchronizing facility was to be provided at some of the stations as furnished in

Annexure-12E.

13. RGMO

MS I/c, SRPC informed that the issue regarding RGMO response had been

deliberated in detail in the Special Meeting held on 25th July 2013. Inadequate

response was an area of serious concern. The recommendations/ number of action

plan had also been finalized. The issue was further proposed to be deliberated in the

Special TCC meeting to be held on 21st August 2013.The next meeting on

RGMO/MVAR interchange would be held in the middle of the September

2013.Generators were requested to furnish the information through Web Group

([email protected]) for the period 15th July 2013 to 15th August 2013 and

from 16th August 2013 to 15th September 2013 for fruitful deliberations in the next

Meeting. He also requested the constituents to update the status of RGMO/FGMO

with manual intervention as given in Annexure-13A.


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14. LGBR & OUTAGE PLANNING

14.1 Status Review on development of load forecasting tools by SLDCs as per IEGC Clause 5.4.2

The issue was noted for compliance by the states/SLDCs.

14.2 Outage Deviation for the year 2013-14 in respect of Generating Units/Transmission Elements of Southern Region SE (O), SRPC said that the reasons for deviations of actual outage for the period

April-June 2013 w.r.t. planned outage schedule was required to be furnished by the

Utilities.

15. TRANSMISSION NETWORK ISSUES AND SYSTEM OPERATION ISSUES Details of Prolonged Outages reported to Hon’ble CERC as furnished in Annexure-15A.

16. OTHER ISSUES

16.1 ATC/TTC calculation by SLDCs SRLDC pointed out that ATC / TTC computations needed to be furnished by State

utilities. LGBR for the next five months was also needed to be furnished by all the

constituents before 5th of every month for the purpose of ATC computations.

16.2 Minimum/Maximum Demand Ratio of Constituent States It was noted that Members were aware that the matter regarding wide variation

between maximum demand and minimum demand was being regularly taken up with

the constituents in the OCC meetings. The details of percentage variation between

maximum and minimum demand for the month of July 2013 are furnished below:

State Maximum to Minimum Demand Variation % Highest Lowest Average

Andhra Pradesh 24.84 20th (Saturday)

9.86 2nd (Tuesday) 19

Karnataka 36.90 25th (Thursday)

22.38 9th (Tuesday) 29

Kerala 49.29 29th (Monday)

40.28 30th (Tuesday) 45

Tamil Nadu 20.45 22nd (Monday)

5.22 7th (Sunday) 15

Puducherry 36.29 16th (Monday)

14.03 6th (Saturday) 26

Southern Region 25.88 23rd (Tuesday)

13.32 5th (Friday) 18

Note: Highest and lowest have been computed from daily values over the month.


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16.3 Forced outages of thermal units

16.3.1 OCC was also apprised of the forced thermal outages of more than 24 hours

duration during the month. Day wise percentage of forced outages in respect of

Central Sector stations had varied from 5.05% to 21.16% and in respect of State

Sector it had ranged between 10.74% and 27.90%. Day wise percentage of

Planned outages in respect of Central Sector stations varied from 0% to 10.74%

and in respect of State Sector it ranged between 4.11% and 9.38% (Annexure-16A).

16.3.2 OCC recommended that the planned/preventive maintenance be carried out as

per schedule to reduce the instances of forced outage.

16.4 Status of Srisailam/Kadamparai pump mode operation It was noted that Kadamparai machines had consumed about 4.515 MU in pump

mode during the month.

16.5 Data/ Information requirements of SRLDC 16.5.1 SRLDC requested timely reporting of the following:

Loss of generation due to coal shortage / technical problems needs to be furnished for onward transmission to NLDC by 1000 hrs on a daily basis.

Providing split-up of details of Non Conventional Energy Sources generation for Solar, Biomass, Wind, Biogases & Small Hydels in monthly data.

Load Forecasting Day wise Block wise

Power Supply Position Report: Hourly Load Shedding & Daily L.S in MU to be submitted before 03:00 hrs for previous day for calculating correct shortage.

16.5.2 SRLDC raised certain commercial issues and requested early action by the

concerned (Details furnished in Annexure-16B).

16.5.3 AGM, SRLDC reiterated that SLDC should release corridor, if any, by 1000 hrs

for the next day for power exchange purposes. If the same was not done the

corridor could be released only for contingency purpose and hence proactive

action by the states was required.


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16.6 Wind Generation SRLDC presented the day-wise Wind Generation pattern in Karnataka & Tamil Nadu

during the period 1st July 2013 to 31stJuly 2013. Wind generation in Tamil Nadu had

varied between 30.24 MU (21stJuly 2013) to 61.94 MU (02nd July 2013). Wind

generation in Karnataka had varied between 13.86 MU (14th July 2013) to 34.7 MU

(31st July 2013). Details are furnished in Annexure-16C.

16.7 Monthly generation data in respect of Renewable Energy Sources MS I/c, SRPC said that Monthly generation data in respect of Renewable Energy

Sources was to be sent to CEA with a copy to SRPC

16.8 Coal Stock Position 16.8.1 It was noted that as per CEA norms, coal stock position is termed as critical (< 7

days) or super critical (< 4 days) of coal stock. The daily Coal stock position

report as on 4th August 2013 as downloaded from CEA website is furnished at

Annexure-16D. It was noted that the coal stock position in the following thermal

stations was less than that for 7 days generation:

VTS 3 days Simhadri TPS 6 day Bellary TPS 3 days Ramagundam STPS 0 day

16.8.2 Generators were requested to improve the coal stock position, especially since

demand had reduced and frequency of operation had considerably improved.

16.8.3 The Coal Stock status received from Generators/Constituents is enclosed as

Annexure-16E.

16.9 Normative vs. average actual ex-bus generation

SRLDC presented the details of normative and average actual ex bus generation in

respect of ISGS for the month of July 2013 (Annexure-16F).

16.10 Utilisation of inter-regional links

SRLDC presented the utilization of inter-regional links (Annexure-16G).

16.11 Drawal Extremes

DGM, SRLDC presented the statement of Drawal Extremes during the month of July

2013. The maximum till date are furnished in the table below:


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State Extremes July 2013 Extremes till date(up to June

2013) Max (MW) Date Time

Block Min

(MW) Date Time Block

Max (MW) Month Min

(MW) Month

AP 4405 15.07.13 21 2088 28.07.13 74 4564 May-13 -1280 Aug. 06 KAR 1197 06.07.13 72 -732 24.07.13 90 2722 Sep.10 - 947 Sep. 09 KER 1647 09.07.13 80 491 28.07.13 21 2133 May-13 -610 Oct. 07 TN 3796 19.07.13 19 2632 04.07.13 49 4315 May-11 -100 Oct. 03 PUDU 317 04.07.13 80 121 18.07.13 83 332 May-13 8 Dec. 11

Andhra Pradesh, Karnataka, Kerala, Tamil Nadu and Puducherry had variations

of 2417 MW, 1929 MW, 1156 MW, 1164 MW and 196 MW respectively.

16.12 Apportionment of Coal to Talcher stage- I and stage-II: 16.12.1 SRLDC brought to notice, provisions of CERC Order dated 23rd July 2013 in

respect of Petition No. 152/MP/2012. Para 19 regarding ‘Maintenance of

Common Coal Stock’, is reproduced below for perusal:

“19.The petitioner has alleged that NTPC is maintaining common coal stock for Talcher STPS Stage-I and Stage-II, through separate coal linkages have been allocated to them. The petitioner has sought direction to NTPC to maintain separate coal stock on the ground that the beneficiaries of Talcher STPS Stage-I and Talcher STPS Stage-II are from different regions. It appears that the question was raised at the ERPC forum. The ERPC had constituted a Committee with Director-level executive of the petitioner as one of the members of the Committee which decided that the coal stock at the Talcher STPS should be distributed between Stage I and Stage II in the ratio of 1:2. The representative of the petitioner does not appear to have expressed any dissent or reservation as the decision of the Committee is unanimous as noticed from the minutes placed on record by NTPC. In view of the decision in ERPC forum, any direction for maintenance of separate coal stock for Talcher STPS Stage I and Stage II becomes irrelevant because the coal is to be used in the agreed proportion.”

16.12.2 MS I/c, SRPC stated that earlier also the issue of relatively lower generation at

Talcher Stage-II w.r.t. Stage-I had been brought to the attention of NTPC.

16.12.3 AGM, SRLDC said that they would monitor the coal stock and generation levels

of Stage-I and Stage -II regularly.

16.13 Reactive Power Capability Testing of Generators

SRLDC informed that the draft procedure for Reactive Capability Testing had been

prepared based on the experience of ER and WR. All constituents/generators had

been requested to study and to give comments, if any, by 25th August 2013.The final


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testing procedure would be finalized by incorporating the comments/suggestions

received.

16.14 Other information Planned and Forced outages of Generating Stations are enclosed as

Annexure-16H. Status of upcoming Generating and Transmission Schemes in Southern

Region are enclosed at Annexure-16 I. Variable Cost of ISGS/CGS Stations is enclosed as Annexure-16 J. Details of Bilateral exchanges (as per PSP) and Power Exchange (as

furnished by States) are enclosed at Annexure-16 K. PLF of Major IPPs is enclosed as Annexure-16 L. Details of Maintenance of Transmission Elements are enclosed as

Annexure-16 M. 17. VOTE OF THANKS

MS I/c, SRPC thanked the Members for their active participation in the Meeting.

18. DATE & VENUE OF THE NEXT MEETING

The schedule for next OCC Meeting is as follows:

Meeting : 87th OCC of SRPC

Date : 11.09.2013 (Wednesday) Time : 10:00 Hours Venue : SRPC, Bangalore

***

Documents

SOUTHERN REGIONAL POWER COMMITTEE - Kar · 2013. 9. 3. · SOUTHERN REGIONAL POWER COMMITTEE BANGALORE MINUTES OF THE 86th MEETING OF THE OPERATION COORDINATION COMMITTEE OF SRPC