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Development of Transmission System in India. India - Present Power Scenario. Generation Peak Demand : 132 GW Growth Rate : 9 – 10 % (per annum). Total Installed Capacity – 228.7 GW (As on 30.09.13). Evolution of National Grid. National Grid. Interconnecting Regional Grids with HVDC.

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Development of

Transmission System in India


India - Present Power Scenario

  • Generation

  • Peak Demand : 132 GW

  • Growth Rate : 9 – 10 % (per annum)

Total Installed Capacity – 228.7 GW (As on 30.09.13)


Evolution of National Grid

National Grid

Interconnecting Regional Grids with HVDC

Regional Grids with ATS of Central Generation

2000 onwards

1990s

State Grids by SEBs

1970-80s

(Paradigm Shift from self sufficiency at Regional level concept to National level)

1950-60’s

Local

1950’s


August 2006

North synchronized

With Central Grid

Five Regional Grids

Two Frequencies

March 2003

West synchronized

With East & Northeast

NEW Grid

October 1991

East and Northeast

synchronized

South

Grid

Central Grid

MERGING

OF

MARKETS

North

East

West

Northeast

South

Installed Capacity 229 GW

Five Regional Grids

Five Frequencies

4


Transmission Network - Present

The

‘Electrical’

Regions

NORTHERN REGION

1

NORTH-EASTERN REGION

EASTERN REGION

WESTERNREGION

2

SOUTHERN REGION

  • 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)

    • 765kV : 7910 ckm

    • 400kV : 1,20,693 ckm

    • 220kV : 1,42,536 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.


Inter-Regional Capacity - Existing

NR

NER

SR

Present IR Capacity – 31,850 MW

6,220 MW

14,230 MW

1,260 MW

ER

WR

WR

4,390 MW

1,520 MW

3,630 MW

6


Players in the Power Sector

Generators

Central/State GENCO, IPP, Captive

CTU

Inter-State Trans. system, Open Access

System Operator

STU

Intra-State Tr./Sub-tr. system

Power Exchange

Traders

DISCOMS

Consumers

Industries, household, agriculture


Role of POWERGRID as CTU

  • To undertake transmission of electricity through ISTS

  • To discharge all functions of planning and co-ordination relating to ISTS with Central Govt, CEA, RPC, STU, Trans Licensees.

  • To ensure development of an efficient, co-ordinated and economical system of ISTS lines for smooth flow of electricity from generating stations to the load centres

  • To provide non-discriminatory access to its transmission system for use by any licensee or generating company on payment of the transmission charges; or any consumer as and when such open access is provided by the State Commission


Grid Management - Hierarchy

NLDC:

Ensure integrated operation of National Grid

RLDC:

Ensure integrated operation of Regional Grid

5

SLDC:

Ensure integrated operation of State Grid

31



Need of new initiatives in transmission

Projected Power Scenario

Need of new initiatives in Transmission

# Considering 9% GDP growth rate

205GW

Present Generation Capacity & Demand - 228 GW & 132 GW

** Source- Planning commission report on IEP


Demand Pattern in India

Ahmedabad

Mumbai & Pune

Hyderabad

Bangalore & Chennai

Source: NASA Satellite Snapshot


Energy Resource Map

Energy resources (coal, water etc.) unevenly distributed

Hydro

  • Coal – In Central India

    - Chhattisgarh : 58000 MW

    - Orissa : 30000 MW

    - Jharkhand : 15000 MW

    - Madhya Pradesh:16000 MW

  • Hydro –In North Eastern & Northern Himalayan region

  • Coastal based

    - Andhra Pradesh: 24000 MW

    - Tamil Nadu : 10000 MW

    - Gujarat : 11000 MW

Coal


12th Plan (2012-17) Capacity Addition : 88 GW

Thermal – 72 GW

Hydro – 11 GW

Nuclear – 6 GW

Renewable Capacity Addition - 12th Plan(2012-17) : 42 GW

Wind – 30 GW

Solar – 10 GW

Small Hydro – 2 GW

Future Generation Scenario (5-6 Years)


Transmission Line : 1,10,000 ckm

(POWERGRID – 40,000ckm)

765kV – 27,000 ckm

400kV – 38,000 ckm

220kV/132kV – 35,000 ckm

HVDC – 9,500 ckm

Substations : about 270,000 MVA

(POWERGRID – 100,000 MVA)

Expansion Programme – 12th Plan


Emerging National Grid

  • National Grid comprises of Inter-State, Intra-State and Inter-regional transmission system

  • Cummulative Growth of Inter-regional capacity in MW

66000

80000

60000

27750

40000

20000

0

By 2016-17

2011-12

National Grid – A Continuing Process


Augmentation of IR Capacity in XII Plan

NR

6000 MW

NER

10200 MW

5800 MW

1600 MW

ER

WR

8400 MW

6400 MW

National Grid - XII Plan addition – 38,400 MW

National Grid - Total by XII Plan – 66,000 MW

SR



Pursuing Higher Voltage Levels

Voltage (kV)

World’s Highest

Voltage level – Test station Charged in Oct.’12

World’s longest

multi-terminal

HVDC to harness renewable

Hydro Power from North-east

1200kV

765kV D/C - AC

800kV

HVDC

765kV

500kV

HVDC

400kV

220kV

1977 1990 2000 2002 2012 2017-18

Year


Technology being Adopted

  • High Voltage line

  • Increase the capacity of trans. corridor through HSIL/re-conductoring with HTLS /Upgradation

  • Utilisation of existing transmission lines upto full thermal capacity – Series capacitors, SVC, FACTS

  • Optimization of Tower design – tall tower, multi-ckt. tower

  • GIS substation

  • EHVAC : 400kV  765kV  1200kV

  • HVDC : 500kV  800kV


Road map for indian power system

High Power Intensity Corridor

Road Map for Indian Power System

176 m

69 m


Implementing +800kV HVDC Bipole Link

  • World’s longest multi-terminal ±800 kV HVDCunder implementation from BiswanathChariali, North-Eastern Region to Agra, Northern Region.

  • Shall transmit power to the tune of 6000-8000 MW.

Biswanath Chariali

Agra

2000 km


Indigenous Development of 1200kV UHVAC

  • World’s highest voltage, 1200kV UHV AC, test charged at Bina, Madhya Pradesh in October 2012.

  • Has been Developed Indigenously through Public Private Partnership (PPP) with 35 Indian manufacturers in open collaboration.




Long Term Open Access / Connectivity

Long-term Open Access

Application Received : 218no. , 132,000MW

Granted : 148 No., 83,000 MW :

Connectivity

Application Received : 188no. , 176,300MW

Granted : 84 No., 74,400 MW

Short Term Open Access

2012-13 : 32,000 transactions, 74BU energy








India – Sri Lanka Interconnection

Madurai-New

Madurai

48 Kms

130 Kms

120 Kms

Panaikulam

Thirukketiswaram *

Taliamannar

110 Kms

Proposed Route for Interconnection

New Anuradhapura


Road map for indian power system1

Issues & Challenges

Road Map for Indian Power System

  • Issues concerning availability of RoW and same are becoming critical –

    • Resistance of people, terrains in areas of mountains and forest

  • Sector to grow from 228 GW to 600 GW in next 20 years – Even 765kV system may not be good enough. New methods have to be found out

  • Challenges to develop Transmission system to meet the requirement of power flow from anywhere to anywhere.

  • With increasing magnitude of power transmission, create new challenges of proper O&M



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