Short Term Open Access in inter state transmission
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By:
Chandan Kumar
Emp.No: 02616
ET,WRLDC
Project Guide :
Shri. P. Pentayya
GM,WRLDC
(c) All Right Reserved
� India : World Fifth Largest Energy Consumer.
� 4% of Global Energy Consumption by 17% of the World Population.
� Installed Generation Capacity 201637.04 MW.
� Consist of two Grid connected asynchronously : NEW Grid and Southern Grid.
Power System Constitutes of three entities :
� Generation.
� Transmission.
� Distribution.
Apart from them Grid Management is required for the Real Time operation.
(c) All Right Reserved
Indian Power Market can be categorized on the basis of duration
of trade between the buyer/seller and Generator/Drawee:
� Long Term Access : It is for a period of 12 years up to 25 years� Long Term Access : It is for a period of 12 years up to 25 years
� Medium term Open Access: It is for a period of 3 months up to 3
years
� Short term Open Access :It is for a period of up to 1 months
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Short Term Market Constitutes of :
� Bilateral Market
� Power Exchange Traded Market
� UI
� Ancillary Services
� REC/Emission Market
Short Term open Access Constitutes of :
� Bilateral Transactions
� Collective Transactions
� Sometime STOA is used in literature for Short Term Market .
(c) All Right Reserved
11%
Indian Power Market
Jan 2011 - Feb 2012
Short Term Market Contribution 9% : 2009-10
10% :2010-11
10.75 % 2011-12 (As Projected)
89%
Short Term market
LTOA and MTOA
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Total electricity
transacted through
Traders and
PXs(MUs), 39%
Total electricity
transacted through
UI, 30%
ST Market
Jan 2011-Feb 2012
'Total electricity
transacted Through
Direct Trading
(MUs), 15%
Day Ahead market
of IEX, 15%
Day Ahead
market of
PXIL, 1%
(c) All Right Reserved
� Decreasing trend of UI
� PX contribution has shown the increasing trend
over the years.
� PXIL contribution is less compared to IEX � PXIL contribution is less compared to IEX
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1000
1200
1400
1600
En
erg
y (
MW
s) UNCONSTRAINED CLEAR
0
200
400
600
800
En
erg
y (
MW
s)
VOLUME IEX
ACTUAL CLEARED VOLUME
AND HENCE SCHEDULED IEX
UNCONSTRAINED CLEAR
VOLUME PXIL
ACTUAL CLEARED VOLUME
AND HENCE SCHEDULED PXIL
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� System constraints are more in Nov-April
leading to less cleared volume of power
� 9.8 % of the day ahead transaction through
power exchange was not approvedpower exchange was not approved
� The electricity demand through day-ahead
contracts from PXs is more in winter and
reduces in summer season
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4
5
6
Pri
ce (
Rs/
kW
h) 'Weighted Average Price of electricity
transacted through Traders (Rs/kWh)
0
1
2
3
Pri
ce (
Rs/
kW
h)
Weighed Average Price of electricity
transacted Through IEX (Rs/kWh)
Weighed Average Price of electricity
transacted Through PXIL (Rs/kWh)
(c) All Right Reserved
� Price of electricity through traders is more
compared to through PXs
� Month October the PXs price is more compared
to price through tradersto price through traders
� While in Feb-march 2011 the PXIL price is more
compared to traders pricing of electricity
� Tough completion between the traders and PXs
can be observed here as the price difference is
varying continuously
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10
12
14
Directly Through Power Exchange (Rs/kWh)
Through Term Ahead Market through Power Exchange
(Rs/kWh) WEEKLY CONTRACTS
0
2
4
6
8
Jan-11 Feb-11 Mar-11 Apr-11 May-11 Jun-11 Jul-11 Aug-11 Sep-11 Oct-11 Nov-11 Dec-11 Jan-12 Feb-12
(Rs/kWh) WEEKLY CONTRACTS
Through Term Ahead Market through Power Exchange
(Rs/kWh) DAY AHEAD CONTIGENCY CONTRACTS
Through Term Ahead Market through Power Exchange
(Rs/kWh) DAILY CONTRACTS
Through Term Ahead Market through Power Exchange
(Rs/kWh) INTRA DAY CONTRACTS
(c) All Right Reserved
10
12
14
Directly Through Power Exchange (Rs/kWh)
Through Term Ahead Market through Power Exchange
(Rs/kWh) WEEKLY CONTRACTS
0
2
4
6
8
Jan-11 Feb-11 Mar-11 Apr-11 May-11 Jun-11 Jul-11 Aug-11 Sep-11 Oct-11 Nov-11 Dec-11 Jan-12 Feb-12
Through Term Ahead Market through Power Exchange
(Rs/kWh) DAY AHEAD CONTIGENCY CONTRACTS
Through Term Ahead Market through Power Exchange
(Rs/kWh) DAILY CONTRACTS
Through Term Ahead Market through Power Exchange
(Rs/kWh) INTRA DAY CONTRACTS
(c) All Right Reserved
� Power through direct trading from power
exchange is lowest.
� Cost of power increases as we proceed from
weekly, day-ahead, daily to intraday in PXsweekly, day-ahead, daily to intraday in PXs
trading.
� The cost is more when there is higher system
contingency and vice-versa.
� Cost of power through PXIL is more compared
to IEX.
(c) All Right Reserved
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� Direct trading through IEX is cheaper.
� Price of weekly contracts for electricity trading is
low for PXIL compared to IEX in winter (oct-feb).
� For summer season it has a varied trend.� For summer season it has a varied trend.
� Non uniformity of market in other types of
contracts
(c) All Right Reserved
6
7
8
Weighted Average Price of electricity transacted
Through UI (Rs/kWh)
NEW
0
1
2
3
4
5
Rs/k
Wh
NEW
Grid
SR Grid
(c) All Right Reserved
� The Price of electricity traded through UI is lower
in NEW grid and higher in SW grid in Jan-June
Period.
� Lower cost in .SR grid in the rest of the month.� Lower cost in .SR grid in the rest of the month.
� The price of UI in SR Grid is more as it is a
power deficit region.
� The synchronization of SR to NEW grid will
reduce the overall price vector of UI in NEWS
grid.
(c) All Right Reserved
� Evacuation Problem
� Intra State open access issues
� Contingency Problem
� Existence of Two Grids� Existence of Two Grids
(c) All Right Reserved
� Strengthening the upstream and down stream
transmission networks to better utilize the
existing Inter-regional transmission capacity.
� Increased Number of Power exchanges.� Increased Number of Power exchanges.
� Reduction in T/D Losses by Strengthening of old
Lines.
� Increasing the ATC/TTC margin of the available
lines using Reactors, FSC, TCSC and optimal
placement of phase shift transformer
(c) All Right Reserved
� Real time dynamic loadility with the introduction
of PMU technology.
� market rules should be such as to encourage
broad participation and ensure fairnessbroad participation and ensure fairness
� Introduction of Ancillary Services.
� Renewable Integration with the Grid.
(c) All Right Reserved
� 1. www.cercind.gov.in
� 2. www.cea.nic.in
� 3. “Consultation Paper on Modifications in Power Market Design: Evening Market, 15
minute Bidding time block and Ancillary market on Power Exchange” by CERC
� 4. “The India Electricity market outlook” by KPMG � 4. “The India Electricity market outlook” by KPMG
� 5. “Ancillary Services in Indian Context: An Approach Paper” by POSOCO.
� 6. “High capacity power Transmission corridor - Project inception report” by PGCIL
� 7. “The Indian Electricity Market: Country Study and Investment Context” by Peter M
Lamb
� 8. “Electricity Market Reform: Lessons for developing countries” by Erkan Erdogdu
(c) All Right Reserved
Questions
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