Regarding Real-Time Market in India

1. Implementation and
Operational aspects of
Real Time Market in India
P.K.Agarwal, Director, Market Operations
28th April 2020 Introduction to Real Time Elecricity Market 1

2. Outline
• Different Markets in India
• RTM in Indian Context - challenges
• Operation timeline of markets
• Typical data flow in RTM
• Status of Preparedness
Introduction to Real Time Elecricity Market 28th April 2020 2

3. Grid
Operation in
Market
Environment
Electricity Markets are Designed to provide reliable
electricity at least cost to the consumers
Tools & Markets in India to achieve least cost:-
• For User of the Grid:-
• Day Ahead Market.
• Intraday/contingency Market
• Choice of Revision of schedules
• Real Time Market
• For Grid Operators
• RRAS – Ancillary Service
• SCED – Security Constraint Economic Despatch for cost
Optimization
• AGC - Automatic Generation Control - Automatic
• For Both, User as well operator
• DSM – To manage last minute Inadvertent Deviation

4. RTM in India
is Unique
has
Challenges
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RTM is Centralized balancing market in
decentralized system of scheduling.
• Schedules are made at RLDCs by SLDCs- RTM is operated
centrally at NLDC
• For every RTM, Schedules from five RLDCs are brought to NLDC.
• Calculations done at NLDC for balance margin
• Coordination with PX for RTM results.
• Running of Ancillary (RRAS and SCED
• After consolidation, schedules are sent back to RLDCs for
dissemination to SLDC and other stake holders.
RTM Market clearing is done by Px not by system
operator
• Bids/Offers called by Px - Margins calculated by NLDC- clearing
engine run by Px results to NLDC for further processing.
• Many numbers of data exchange within very tight timeline

5. Market Operational Timelines
5
2245 2300 2345 0000 0015 0030 0045 0100
RTM
Auction 1
RTM
Clearing
2315 2330
RRAS
RRAS +
SCED
28th April 2020 Introduction to Real Time Elecricity Market
2245 0000
Delivery Period
0030
Day Ahead Market
As per market timeline
Intra-day / Contingency
As per market timeline
Right to Revision of Schedule
For period 000-0030 end here
Day Ahead Period Real Real Time period
RTM for period
0000 to 0030
RRAS & SCED for
period
0000 to 0030
Gate Closure
Margins to Px
Schedulepreparationand
communicationforperiod
0000to0030
RTM and Optimization for
delivery period 0000 to 0030
DSM DSM
AGC AGC
Next RTM and Optimization for
delivery period 0030 to 0100
Next Delivery
Period

6. SR
NR
IEX
Typical Data transfer between NLDC, RLDCs and Power Exchanges
ER
NER
WR
DAM and RTM
processing
OUT INMain
Standby
PXIL
NLDC Server
Scheduling
System
RLDC Scheduling Software
PX Servers
Power Exchanges
ATC Processing
Margin

7. RTM ATC Calculation Module - Typical
By 0600 hrs
NLDC Upload link wise,
area wise TTC,RM,ATC
(ATC=TTC-RM)
Margin Calculation for DAM
Margin = ATC - (LTA+MTOA+STOA
Schedules) on each corridor, area,
region
LTA, MTOA to be as per
entitlements
By 1000 hrs RLDCs to
declare Region
wise and corridor wise ATC
margin using entitlements, LTA,
MTOA, STOA
Allocation of margins to
power exchanges as per
existing practice
By 0800hrs.
RLDCs to declare foreseen
capabilities of ISGS basedon
entitlements
Receipt of final trade from
power exchanges and
incorporation in schedule
by RLDCs
By 1800 hrs;
Issuance of Rev0 schedule
by RLDCs
Real Time ATC
Margin
Updation
Allocation of margin to
power exchanges based
on methodology at
Annexure-1
(Each run of RTM)
RLDCs processes Day
ahead / Contingency
bilateral applications
through STOA software
MarginsforDA/
Contingency
Bilateral
DAM Engine
Residual
margin
after DA /
Contingenc
y bilateral
processing
Receipt of final trade from
power exchanges and
incorporation in schedule
by RLDCs
(Each run of RTM)
Calculation of left-over margin
Incorporation
of RTM trade
in schedule
by RLDCs
RTM Engine
Margin
s
PXDAMTrade
Margin for RTM
PXRTMTrade
STOA Software
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8. Preparedness
Status
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New scheduling application developed for all RLDCs/NLDC.
RTM Workshops conducted in all the regions involving stakeholders
of the region for discussing regulations, daft procedure.
Meeting with both Px – For finalizing methodology.
Data flow test between RLDCs and NLDC test servers going on.
Data exchange API with Px and scheduling software under data
exchange test.
Plan under preparation for doing mock/shifting scheduling to new
systems.
RTM engine developed – under test – integrated test to be done

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