SEM Hand Book

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Special Energy Meter Handbook (Northern Region)

POWER GRID CORPORATION OF INDIA LIMITED

NORTHERN REGIONAL LOAD DESPATCH CENTRE(A Government of India Enterprise)

March 2010

CONTENTSPage No Foreword .

Section-1 Special Energy Meter & Data Collecting Device 11.1 Special Energy Meter (SEM) ......1 1.1.1 SEM concept ..1 1.1.2 General Description of SEM .....1 1.1.3 Data Recording Forma ..2 1.1.4 Measurement Principle ......4 1.1.5 Operating Section of the Meter.....4 1.1.6 Display Parameters ....4 1.1.7 Meter parts and overall dimension of the meter.....5 Data Collecting Device (DCD) ........................................................................6 Salient features of SEMs ..................7 1.3.1 Criteria for location of SEMs ....7 1.3.2 Sign convention of Active and Reactive energy recorded ...7 1.3.3 Details of Data recorded ...7 Operating Instruction for SEMs and DCDs ........8 1.4.1 SEM Data Collection...8 1.4.2 Data collection in case of feeder outage ....8 1.4.3 Periodical Checks ......9 1.4.4 Special precautions .....10 Software Installation Procedure ......10 Typical Metering Diagram .............................................................................13

1.2 1.3

1.4

1.5 1.6

Section-2 Regulatory Requirements of Meters ...142.1 Metering Philosophy of CEA .......14 2.1.1 Types of Meters (Clause 4 of metering regulation of CEA) ......14 2.1.2 Meter Standards (Clause 5 of metering regulation of CEA) .....14 2.1.3 Accuracy Class of Meters (Part I Standards Common to All Type of Meters, Metering regulation of CEA) 14 2.1.4 Location of Interface Meters (Clause7 of metering regulation of CEA) ......15 Regulatory Requirements of Special Energy ........................................................................................................16

2.2

Section-3 Special Energy Meters an overview in Northern Region .183.1 3.2 Summary of Special Energy Meter in Northern Region ....18 Constituent wise Summary of Special Energy Meter in Northern Region .....19 3.2.1 NTPC .......19 3.2.2 NHPC .......19 3.2.3 NPC ..19 3.2.4 SJVNL ..19 3.2.5 THDC ....20 3.2.6 BBMB ...20 3.2.7 UPPCL .....21 3.2.8 PTCUL/UJVNL 22 3.2.9 RVPNL .22 3.2.10 POWERGRID .....23 3.2.11 UT CHANDIGARH .24 3.2.12 DTL ...24. 3.2.13 HVPNL .....24 3.2.14 HPSEB .....24 3.2.15 J&K ...25

3.2.16 PSEB ......25 3.2.17 RAILWAYS ....25 3.3 List of Special Energy Meter installed in Northern Region ........26 3.3.1 NTPC .....26 3.3.2 NHPC .....32 3.3.3 NPC ....35 3.3.4 NATHPA JHAKRI HPS (SJVNL) ...37 3.3.5 TEHRI HPS (THDC) ....37 3.3.6 BBMB .....38 3.3.7 UPPCL ...48 3.3.8 PTCUL/UJVNL .....53 3.3.9 RRVPNL ....56 3.3.10 POWERGRID ..58 3.3.11 UT CHANDIGARH ......68 3.3.12 DTL 69 3.3.13 HVPNL ..71 3.3.14. HPSEB ..72 3.3.15 J&K 74 3.3.16 PSEB .76 3.3.17 List of other Special Energy Meters of importance for Northern Region ....79

Section-4 Future Requirement of Special Energy Meters in Northern Region 82 Section-5 Block diagram of utilities net interchanges with the Grid ..89 Section-6 Formulae for calculation of net injection/drawl of utilities in Northern Region .....996.1. Net Injection of ISGS & BBMB Stations in Northern Region .....100 6.1.1 NTPC .......100 6.1.2 NHPC ...105 6.1.3 NPC ..108 6.1.4 BBMB ...110 6.1.5 NJPC ....112 6.1.6 THDC ....113 6.2 Generation at shared projects in northern region ....114 6.3 Drawl of utilities from grid ....115 6.3.1 Drawl of Punjab State Electricity Board (PSEB) from grid ...115 6.3.2 Net drawl of Haryana Vidyut Prasaran Nigam Ltd (HVPNL) from grid ......123 6.3.3 Drawl of Rajasthan Rajya Vidyut Prasaran Nigam Ltd (RVPNL) from grid ..129 6.3.4 Drawl of Delhi Transco Ltd (DTL) from grid ......133 6.3.5 Drawl of Uttar Pradesh Power Corporation Ltd (UPPCL) from grid ..136 6.3.6 Drawl of Uttarakhand Power Corporation Ltd from grid ......142 6.3.7 Drawl of Himachal Pradesh State Electricity Board (HPSEB) from grid ...147 6.3.8 Drawl of Power Development Department of Jammu & Kashmir (PDD, J&K) from grid .......150 6.3.9 Drawl of electricity department, UT- Chandigarh from grid ....152 6.3.10 Drawl of National Fertilizer Limited (NFL) from grid ....154 6.3.11 Drawl of others from grid .....155 6.3.12 Regional net injection/drawl and loss calculation ....156

Section-7 Computation of reactive exchanges between different utilities in northern region ......1607.0 Description of reactive energy exchanges files between different utilities in northern region ...160

ForewordSpecial Energy Meter (SEM) with Data Collection device (DCD) was conceptualized by POWERGRID in the beginning of 1990s to take care of metering requirements of bulk power tariff structure in India in line with ECC recommendations .This ultimately paved way for ABT (Availability Based Tariff) implementation in India. SEM/DCD was, therefore a special metering package, aimed at fulfilling metering needs under ABT era. As per IEGC provisions, CTU (POWERGRID) is responsible for installation as well as maintenance/testing of SEMs in ISTS. RLDCs validate and process the meter readings received from various locations for computation of actual drawl/injection of utility. In case of any discrepancy/problem related to meter/accessories, RLDCs take up the matter with respective RTS/ISGS/STU for rectification. In nutshell, metering activities are very well streamlined and carried out in a specific time frame. As per IEGC all constituent have to send SEM data to NRLDC by Tuesday noon and SEM data in all respect after validation should be sent to NRPC by Thursday for issue of UI/reactive account. The book unfolds detailed description of SEM/DCD followed by the regulatory requirements. It also contains details of meter locations, block diagram/formulae for drawl of states and injection of ISGS from the grid. All efforts have been made to make this book error free and up to date. However in view of the fast changing network conditions, it is possible that some of the changes could have not been incorporated as per actual. Any feedback from the users of the book is most welcome as it will further help us in improving the accuracy, quality, style and presentation of the book in the future.

(V.K.AGRAWAL) General Manager

SECTION-1

SPECIAL ENERGY METERS AND DATA COLLECTING DEVICES

SECTION-11.1 Special Energy Meter (SEM)

1.1.1 SEM ConceptSEM is an Application specific Microprocessor base solid state energy meter. This together with a data collecting device (DCD) and a local Computer forms a powerful system of metering and data logging. This type of metering and data logging gives a unique method for measurement of all relevant electrical quantities. Taking help of the support software on a PC enables the user to process metered data and the data can also be viewed in a tabular format.

1.1.2 General Description of SEM Static Accuracy class of 0.2S as per IEC 62053 standard Working voltage of 63.5V Composite meter capable of measuring Active and Reactive Energy in all 4 quadrants

1

Direct measurement as per CT/PT secondary quantities Filters harmonics and measure energy at fundamental frequencies Operates on self power from connected PT supply (110V Ph to Ph/ 63.51 V Ph-N) Secondary current rating of 1A (A-type) and 5A (B-type) VA burden not more than 10 on any of the phases Working range (-5 to 60 deg C) Works on Real Time Clock (RTC) hence data is time stamped with accuracy of 60 sec/month Time adjustment facility ( in steps of 1 min in a week ) No calibration required due to absence of moving parts.( Calibration possible only at Manufacturers works) Extended temperature LCD for display Rechargeable Ni-Cd battery with a push button on front panel to operate during power failure High security of data storage Off line data collection possible for 6-7 hrs during power off condition Surface mounted, light in weight (SCPBAT R C: A:GRIDSVR /E/V/D Removing. Complete. A:\> Now the copyright file is restored from PC to floppy, so that the same can be used for another installation. ii) For uninstalling the program files from the PC: Uninstall the Smartgrid software through Add/Remove programmes menu in Control Panel in My Computer.

12

1.6. Typical Metering Diagram

13

SECTION-2

REGULATORY REQUIREMENTS OF SPECIAL ENERGY METERS

SECTION-22.1 Metering Philosophy -Central Electricity Authority (Installation and Operation of Meters) Regulations, 2006. Notified vide date 17th March 2006)2.1.1 Types of Meters (Clause 4)a) Interface Meter: Interface Meter means a Meter, connected at the point of interconnection with inter-State Transmission system (ISTS) for the purpose of electricity accounting and billing. Meter shall be owned by CTU. b) Consumer meter: Consumer Meter means a Meter used for accounting and billing of electricity supplied to the consumer. Meter shall be owned by licensee. c) Energy accounting meter: Energy Accounting and Audit Meter means Meter used for accounting of electricity to various segments of electrical system. Meter shall be owned by Generating Company or licensee All interface meters, consumer meters and energy accounting and audit meter shall be of static type. Note: Our focus is on SEMs which are interface meters.

2.1.2 Meter Standards (Clause 5)All interface meters, consumer meters and energy accounting and audit meters shall (a) Comply with the relevant standards of Bureau of Indian Standards (BIS). If BIS Standards are not available for a particular equipment or material, the relevant British Standards (BS), International Electro-technical Commission (IEC) Standards, or any other equivalent Standard shall be followed: Provided that whenever an international Standard or IEC Standard is followed, necessary corrections or modifications shall be made for nominal system frequency, nominal system voltage,