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Submitted To: Submitted By:TANUJ BHARDWAJ DHARMPAL YADAV
PGCIL INDIA
Introduction
Interstate & intera state transmission system are interconnected and together the electrictygrid by Government of India(GOI).
IN 1963 India was divided in five region . PGCIL(power grid corporation of india
limited) was established in 1989 to implemented the decision of GOI to form a NATIONAL GRID .
Business
POWERGRID operates throughout india. It transmission network consists of roughly
134,018 circuit kilometers It consisats 214 EHVAC & HVDC stations, which provide total transformation
capacity of 278,862 MVA. POWERGRID is listed on both the BSE &
the NSE.
• Generation
• Peak Demand : 132 GW
• Growth Rate : 9 – 10 % (per annum)
Total Installed Capacity – 228.7 GW (As on
30.09.13)
NER
ER
NR
WR
SR
India - Present Power Scenario
National Load Despatch Centre (NLDC)
1. Northern Regional Load Despatch Centre (NRLDC)
2. Western Regional Load Despatch Centre (WRLDC)
3. Eastern Regional Load Despatch Centre (ERLDC)
4. Southern Regional Load Despatch Centre (SRLDC)
5. North-Eastern Regional Load Despatch Centre (NERLDC
REGION Dispatch Center Installed Capacity
Northern Delhi 31,307 MW
Southern Bangalore 32,779 MW
Eastern Kolkata 16,410 MW
Western Mumbai 32,761 MW
North-Eastern Shillong 2,357 MW
Location of RLDC’s and Installed Capacity
• Northern Grid : Deficit Region , highly weather sensitive load, Adverse weather conditions like fog and dust storm
• Sothern Grid : High load , Monsoon dependent hydro
• Eastern Grid : Low load ,High coal reserve • Western Grid : Industrial Load • North-Eastern Grid : Very low load , High
hydro potential , Evacuation problems
Peculiarities of Regional Grids in India :
Region Demand Supply Deficit
Northern 54,329 MW 54,137 MW -0.4%
Southern 43,630 MW 35,011 MW -19.8%
Eastern 18,507 MW 19,358 MW +4.6%
Western 48,479 MW 50,254 MW +3.7%
North-Eastern
2,650 MW 2,544 MW -4%
Region wise Power Demand and Supply position
Region wise availability of power generation resources
Region Number of resources
Northern 61
Southern 51
Eastern 49
Western 71
North-Eastern 8
Total Installed capacity : 2,01,181 MW Future : 2,08,790 MW
• Conventional Resources (Including Nuclear , Thermal ,Gas/liquid, Hydro)
Region Number of resources
Northern 9
Southern 23
Eastern 18
Western 13
North-Eastern Nil
Total Installed capacity : 38,283.59 MW
• Non-conventional Resources (Including Wind ,Solar)
National Grid
1950-60’s1970-80s
2000 onwards
Local
1950’s
State Grids by SEBs
Regional Grids with ATS of
Central Generation
(Paradigm Shift from self sufficiency at Regional level concept to National level)
Interconnecting Regional Grids
with HVDC
1990s
0
50000
100000
IX Plan X Plan XI Plan XII Plan
510014100
27750 66400
IR Capacity (MW)
Evolution of National Grid
15
NEW Grid
SouthGrid
South
West
NorthEast
Northeast
Five Regional GridsFive Frequencies
October 1991East and Northeast
synchronized
March 2003West synchronized
With East & Northeast
August 2006North synchronized
With Central Grid
Central Grid
Five Regional GridsTwo Frequencies
Installed Capacity 229 GW
MERGING OF
MARKETS
Region links Transaction capacity
ER-WR Two 400 kV lines with TCSC (Raipur-Rourkela) . Three 220 kV lines (Korba-Budhipadar)
1200 MW
WR-NR 500 MW HVDC Back-to-Back (Vindhyachal-Singrauli)
450 MW
ER-SR 500 MW HVDC Back-to-Back (Jeypore-Gazuwaka) . 2000 MW HVDC Bi-pole (Talcher-Kolar)
2250 MW
WR-SR 1000 MW HVDC Back-to-Back (Bhadravati-Ramagundam -Chandrapur)
900MW
ER-NER 400 kV AC Line (Malda-Bogaigaon) . 400 kV AC Line (Birpara-Salakati)
1050 MW
ER-NR 500 MW HVDC Back-to-Back (Sasaram-Pusauli)
450 MW
SR-WR 765KV AC Line (Raichur – Solapur)(under construction)
2000 MW
Salient features of Regional interconnection of grids in India :
Transmission network spread geographically over 3.3million sq
km : Inter-State and Intra-State level
Transmission line : 2,80,571 ckm (POWERGRID : 1,020,000 ckm)
220kV : 1,42,536 ckm 765kV : 7910 ckm 400kV : 1,20,693 ckm HVDC Bipole (±500kV) : 9,432 ckms
Transformation capacity (MVA/MW) HVAC :474,091 MVA
(POWERGRID : 170,000MVA, 171 S/s)−765kV : 56,500 MVA−400kV : 170,397 MVA−220kV : 247,194 MVA
HVDC : 13,500 MW
FSC – 33nos., TCSC – 6 nos.
SOUTHERN REGION
WESTERNREGION
EASTERN REGION
NORTHERN REGION
NORTH-EASTERN REGION
1
2
The‘Electrical’
Regions
Transmission Network - Present
18
14,230 MW
WR
NR
NER
ER
SR
1,520 MW3,630 MW
4,390 MW
1,260 MW
6,220 MW
Present IR Capacity – 31,850 MW
WR
Inter-Regional Capacity - Existing
Our Nertworks
Company owns and operates about 1,35,319 ckt kms of transmission lines at 800/765kV, 400kV, 220kV & 132kV EHVAC & +500kV HVDC levels and 217 sub-stations.
Also the transformation capacity of about 2,80,992 MVA as on 28th February 2017
Opportunities in Future
Indian power system is facing high AT&C Losses, poor distribution network, wide demand – supply gap of energy, poor asset management etc. Smart grid technology will bring solutions to all of the mentioned problems and sustainability by way of demand side management, demand response, outage management, reduction in AT&C losses and improved customer satisfaction
Advantages of Electric Grids
o Reduced operational costo Increased employee safetyo Increased revenue
o Volatility arising from dynamic pricing might cause catastrophic rate spikes (similar to Uber’s surge pricing)
o Complicated rate structures might not incentivize (encourage) efficiency if customers do not understand what their current rates are.
Disadvantages of Electric Grids
With the completion of Raichur - solapur 765KV line India becomesone of the largest operating synchronous grids in the world (one grid one nation) and Interconnection of international grids help in the improvement of Economy of the country as well as it builds positive relationship between neighbouring countries by power sharing/trading
Conclusion
Thanks
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