GCC Participation User’s Group
Jan Van Roost
Outline/Content 1.GCC History 2.Background 3.ENTSOe 4.Modules 5.Principles of GCC (Int’l context)
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GCC – History GCC (Grid control Cooperation) – Netzregelverbund. - Imposed by German Regulator on all TSO’s in germany - Different Modules (netting, activating cheapest unit, common bidding ladder)
-
Within german control block – no congestions considered For Int’l purpose capacity needed
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GCC – Int’l context Interested parties in Europe: • Tennet BV • Swissgrid • CEPS
Capacities: Use remaining capa.
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Stepwise approach / ENTSOe Participation requires ENTSOe notification via SOC - Initial Notification - Collection of objections by other parties involved - first notifications approved for a trial period of 1 yr. - Subject to additional data Particularities - No direct electricl interconnection with germany - Inherent dependence on other parties
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Modules Modules (for Int’l Purpose) - Module 1: netting of imbalances between Control Areas - Module 2: activation of cheapest unit (not quantified)
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4. R2: German Concept
Basic Principle of GCC Control Area A
Generation
Avoidance of counter-activation of SCP
Load
Control Area B
Generation
Load
+ 50 MW Balance
Balance
+ 50 MW Secondary Control Power (SCP)
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~
- 50 MW System immanent counter-activation of SCP
Secondary Control Power (SCP)
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International Concept Reduction of counteracting SCP („Module 1“)
TSO A
Summation of overall negative and positive demand
TSO B
Negative SCP demand („long“)
Positive SCP demand („short“)
Residual GCC SCP demand Import
intraday capacity
intraday capacity
export
TSO B
TSO A
Residual positive SCP activation 8
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Loadflow
Residual negative SCP activation
Elia wishes to investigate paricipation in Module 1 Potential:Based on the first simulations: Elia can benefit in activation cost savings from the participation in GCC. Side impacts / additional gains – not yet quantified • R2 reservations can be kept at the current level (ENTSOe) • Potential to limit/reduce R3 activation • ACE Quality increase due to application of virtual tie-line
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BACKUP SLIDES
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Grid Control Cooperation Reduction of counteracting SCP Control area A Production
Control area B Load
Production
System balance
Free capacity
Participation
Participation
1
SCP set-point:
2
Production
System balance
Free capacity
SCP set-point:
0
Control area C Load
0
1
Load
System balance Free capacity Participation
SCP set-point:
2
0
1
2
virtual tie-lines n
point of time curve without module 1 curve with module 1 11
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Workload impact of a Go descion The following subtasks can be identified and will need to be staffed for further implementation in the course of 2011. Market Impact. • regulatory feasibility • IT / Software tool impact • Communication protocol • IT/ SCADA • secondary controller
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Module 1: ~
+5 / +2
~
-5
CA1
+3
-3 / 0
+3
CA2
KIWA1
Module 1 applies a netting; if CA1 is short (-5) and CA2 at the same time is long (+3), the surplus energy in CA2 can be used via a virtual tie-line (KIWA1) for balancing CA1. Thus, the activation of control power in CA1 can be reduced.
Module 2 (solely): ~
(+5) / Limit: +4
~
-3 / -2
+1 KIWA2
-5
CA1
13
0
+3
CA2
KIWA1
Module 2 is a mutual support with control energy; in case not enough control power is available in CA1 for balancing completely the deviation (the limit is reached), additional control power in CA2 will be activated and delivered via a virtual tie-line (KIWA2) to support CA1.
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Modules 1+2: ~
(+8) / Limit: +4
~
-3 / +1
+1 KIWA2
-8
CA1
14
+3 KIWA1
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+3
CA2
If both modules are applied, the netting is done between CA1 an CA2 via KIWA1 (CA1 „receives“ energy from CA2); CA1 has to balance the remaining deviation. If not enough control power is available (the limit is reached), CA2 activates control power and supports CA1 via KIWA2.