EEC Conference 31 th August, 2015, New Delhi Large Scale Integration - - PowerPoint PPT Presentation

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EEC Conference 31 th August, 2015, New Delhi Large Scale Integration - - PowerPoint PPT Presentation

Sep 04, 2023 298 likes •475 views

EEC Conference 31 th August, 2015, New Delhi Large Scale Integration of Renewables Power System Operation Corporation New Delhi, India S.S.Barpanda AGM,NLDC ssbarpanda@posoco.in 1 Some of the Large Power Grids in the World Source: GO 15

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Large Scale Integration of Renewables

EEC Conference

31th August, 2015, New Delhi

1

Power System Operation Corporation New Delhi, India

S.S.Barpanda AGM,NLDC ssbarpanda@posoco.in

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2

Some of the Large Power Grids in the World

2 Source: GO 15 (2013 Leaflet)

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3

Power System Related

Installed Capacity: 275 GW Renewables Capacity: 36 GW – Wind (23 GW), Solar (4 GW)

  • No. of 400kV & above Trans.

Line: 1300 Nos., 765 kV (65 Nos.) Number of Generating Units: 1750 Nos., 500 MW & above (140 Nos.)

Grid Operation Related

Peak Demand Met: 141 GW Energy Met (Avg.): 3100 MU/day

  • Max. Wind Generation:

240 MU/day Short Term Open Access: 240 MU/day Inter-regional Exchange: 225 MU/day

Typical Statistics

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Indian Power Sector

Thermal 191 GW Hydro 42 GW Nuclear 6 GW Renewable 36 GW Total 275

Power Installed Capacity = 275 GW

4 Wind 23.5 GW Small Hydro 4 GW Solar 3.8 GW Biomass 4.5 GW Total 35.8 GW

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Diversity in Demand

Kerala Assam Maharashtra Delhi All India

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11/18/2015 NLDC - POSOCO 6

Regional Geographical Diversity

Diversity on account of geographical location, seasons, time of day, load, etc.

Demand Met (ER)  NR WR SR ER

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Load Curve and Diversity

Solar All India Hydro Pumped Hydro

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Variation in Hydro Generation

Summer Monsoon Winter

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Typical Load Curves – Ramping Requirement

9 Morning Peak @ 140 MW/min for 40 minutes Evening Peak @ 200 MW/min for 40 minutes

Winter Summer Monsoon

Typical All India Load Curve

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Expected All India Duck Curve (Sample: 20000 MW of Solar Generation)

10 Net Load Actual Demand Belly: Decrease in net load Neck: Steep ramping Head: Evening Peak

Source: NLDC SCADA data, CAGR assumed: 8%

Increase in AC loads would reduce the belly!!

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Evolution of Power Market in India

11/18/2015 NLDC - POSOCO 11

2004: Open Access 2008: Power Exchange FUTURE …

  • Ancillary Market
  • Capacity Market
  • Peaking Power

2009: Imbalance (UI) 2011: Transmission Pricing (POC) 2010: Power Market, REC April, 2012: Sub-Hourly Market (15 Min Bidding in PX) 2009: Grant of Connectivity, LTA and MTOA 2009: Trading License 2009: Congestion Management 2014: Deviation Settlement

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25 – 12 Years

3 Years – 3 Months < 3 Months

Medium Term Short Term Long Term

Products in the Short Term Market

Bilateral - Advance

Bilateral

  • FCFS

PX Day - Ahead

Contingency

Products in Different Time Frames

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SLIDE 13

Vibrant REC Market

  • Introduced in 2010
  • Registered Generators

– 1094 Nos.

  • Registered Capacity –

4809 MW

  • More than 26.5 Million

RECs issued

  • Trading Volume of

more than 18 Billion Rupees

Web Portal - www.recregistryindia.nic.in

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REC Portal Home Page | https://www.recregistryindia.nic.in

Key Highlights:-

  • Transparent
  • Accessible pan India
  • User Friendly
  • Real Time Data on REC
  • Single Touch Point for

information for RE Generators

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Paradigm shift in operations

  • Classical despatch

– Forecast your load; generation fleet has to follow load

  • Renewable Generation: the first game changer

– Forecast load as well as RE; Load-RE or Net Load more important – Conventional generation has to follow net load

  • Storage/Distributed Generation/Electric Vehicles

– From consumers to prosumers

  • A flexible power system

– but one that does not break.

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Provisions Regarding Ramping

  • Provisions in the Indian Electricity Grid Code (IEGC):

– Operating Code (Section 5.2):

  • System Security Aspects - Ramping of

– All thermal units greater than 200 MW. – All Hydro units greater than 10 MW

  • Sudden change in generation / load by the utilities of more than 100 MW

without prior intimation to and consent of the RLDC.

– Scheduling and Despatch Code (Section 6.4)

  • Generators to declare rate of ramping up / ramping down in a 15 minute

block.

  • Acceptable ramping rate – 200 MW/Hour (in NER 50 MW/Hour)
  • CEA Standard Technical Features of Super-Critical Units

– Ramp rate: + 3% per minute (above 30% loading) – Technical minimum load of super critical units – 40% – Two shift operation

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11/18/2015 NLDC - POSOCO 17

All India Plant Load Factor (PLF) – Coal & Lignite based plants

50 55 60 65 70 75 80

Annual Average PLF

Fuel shortage , Change in ‘Peak-to-off-Peak Ratio’