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2015-12-14 – Stockholm
Joint NordREG / Nordic TSO workshop on Flow-Based capacity calculation
Convener CWE FB Experts:
Christophe Mestdag – [email protected]
CWE Flow Based Market Coupling
TSO point of view
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Overview
o Context
o Creation of the CWE FB domain
o IT implementation
o Transparency and interaction with market players
oObservations / Future improvements / Q&A
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Overview
o Context
o Creation of the CWE FB domain
o IT implementation
o Transparency and interaction with market players
oObservations / Future improvements / Q&A
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CWE Market Coupling
06/06/2007: CWE Memorandum of Understanding (PLEF):
Increase SoS
Implement FB MC
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CWE FB MC - milestones
19/03/2012: « Internal Parallel Run »: daily process progressively done by TSO operators
21/02/2013: “External Parallel Run”: weekly publication of simulated market results
20/02/2014: “Daily External Parallel Run”: daily publication of simulated results
23/04/2015: Last approval decisions from CWE NRAs
20/05/2015 (trading day): successful launch of the CWE Flow-Based capacity calculation and allocation
Under the FB methodology both welfare and price convergence increase
Based on 2,5 years of // run, a yearly welfare increase of market welfare of more than 100 M€/year can be expected ≈ 300 k€ / day
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ATC and Flow Based approaches
Capacity by Border
Economical flow
Physical
flows
Margin by Electrical branch
TTC
LTnom
TRM
Available transfer capacity
Ʃ Fmax
N-1 + baseflow
Fref (including Ltnom and N-1)
FRM
Margin available to the market
Fmax
Involved parties
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Overview
o Context
o Creation of the CWE FB domain
o IT implementation
o Transparancy and interaction with market players
oObservations / Future improvements / Q&A
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Input for the model
Basecase
GSK
D2CF CWE
DACF entso-e
CB
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D2CF
How will the grid be ?
Production
Renewable energy
Grid Topology
Load
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Generation Shift Key
Need to translate an incremental cross-border exchange into incremental nodal injections
+100 MW -100 MW
~
~
~ ~
~
~
~
~
~
5 MW
30 MW
20 MW
10 MW
15 MW
20 MW
~
~
~
TSO C
TSO A TSO B
Based on common principles, each TSO
determines the key which maps an import /
export position to an generation pattern
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Impact of N-1
Country A
Country C
Country B
+100 MW
-100 MW
Monitored
lines
Outage
scenario
Margin left
(MW)
Influence of exchange
on lines (PTDF)
AB AC BC
Line 1 No
outage
…
…
Line 2 …
…
Line 3 …
…
150 10%
line 1
Outage1
120 Outage 1 20%
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Creation of the FB domain SoS safe
Monitored Lines Outage scenario Margin left (MW)
Influence of exchange on lines (PTDF)
AB AC BC
Line 1 No outage 150 1% 10% 3%
Outage 1 120 5% 20% 1%
Outage 2 100 6% 25% 1%
Line 2 No outage 150 -2% 0 5%
Outage 3 100 -12% 0 10%
Line 3 No outage
Outage 4
- 400
- 300
- 200
- 100
0
100
200
300
400
- 400 - 300 - 200 100 200 300 400 - 100 0
Security of supply domain
Constraints
Exchange(A>C)
Exchange(A>B)
Active Constraints
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Congestion Management Principles
• Security domain is obtained by taking into account all the relevant physical constraints of the grid
• Given the security domain, NTC/ATC constraints and the corresponding NTC/ATC domain are a choice made by the TSO
• The FB domain is the security domain
itself
• FB offers more trading opportunities with the same level of security of supply
• In FB capacity split is not a choice
of the TSO, but is market driven
(at the time of allocation)
Daily process
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Data Preparation: D2CF, CB + initial Remedial Actions, GSK,…
20:00 09:30 16:00
Qualification: mandatory checks: LTA, NTC,… + additional RA
FB domain calculation
20:30
Verification: local facultative checks: Voltage or Stability problems
Long Term Adjustement
Congestion Income Allocation: by Jao
Allocation in Euphemia (PCR) = “hybrid coupling” :
ATC and FB contraints together
12:00 13:00 04:00 08:00
Day -1 Day -2
Qualification: focus on PST coordination
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PST’s
in CWE Region
Impact of PSTs
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Pedagogical example: asymmetrical usage in CWE
Region
Impact of PSTs
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Pedagogical example: symmetrical usage in CWE
Region
PST coordination proces
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o Common determination of most likely market direction
o Gathering of constraints in the grid from TSO to RSCI
o Assessing most optimal setpoint of all CWE PSTs in multiple iterations
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Overview
o Context
o Creation of the CWE FB domain
o IT implementation
o Transparency and interaction with market players
oObservations / Future improvements / Q&A
IT solutions – message flows
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IT solutions – software design
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FBPCM
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Overview
o Context
o Creation of the CWE FB domain
o IT implementation
o Transparency and interaction with market players
oObservations / Future improvements / Q&A
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Transparancy and interaction with market players
Multiple channels have been set up:
o Q&A Forum
o Utility Tool (excel & web services)
o Anonymised information with fixed ID about critical branches (RAM + PTDF)
o Aggregated D2CF data
o Indicators of Flow Based domain
o Market data
o User groups CCG
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Overview
o Context
o Creation of the CWE FB domain
o IT implementation
o Transparency and interaction with market players
oObservations / Future improvements / Q&A
Observations since go-live
As foreseen, the price convergence in CWE has significantly increased since the go-
live.
As foreseen, physical flows induced by market exchanges are better forecasted with
Flow-Based Market Coupling, which increases grid security.
But on the other hands, net positions are different that what was observed with ATC
MC:
NL imports more;
DE exports more;
FR can export more;
BE can import more.
With Flow-Based, physical flows are more variable/volatile and are regularly loading the
grid elements closer to their limits. (This may also limit the capacity available for ID
exchanges).
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Points for the future
Different elements remain for continuous improvements:
o Advanced Hybrid Coupling
o Collaboration CWE – CEE
o Further improvements on coordination
o Basecase improvements and GSK modelling
o Transparancy and interaction with market players
o …
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Questions ?
Q&A 28
