Transcript WMS Report - ERCOT.com

Wholesale Market
Subcommittee Report
TAC Meeting
July 2, 2003
WMS Reporting Items
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QSE Project Managers Working Group
Short Term Cost Effective Design Issues
DSM Working Group
CMWG (CSCs for 04)
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Note: WMS has not met since the last meeting
of the CMWG (straw votes only)
Secondary CSC
 A significant line that crosses a zonal
boundary where there is not a CSC
 Can be used by Operations for CM
 Does have TCRs & PCRs
 Congestion cost is direct assigned
 Does not impact zonal determination
Secondary CSC Concerns
 Concern was expressed regarding
operations use of this tool in a manner not
predictable by market participants.
 The use of Secondary CSCs requires a
change in the Protocols.
North to Houston CSC
 The majority thinks operations needs a CSC
from North to Houston in 04
 There is division on whether that should be
a primary or a secondary CSC
 Final Straw vote was:
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5 no North to Houston CSC
9 add a Primary CSC North to Houston
2 add a Secondary CSC North to Houston
Final determination of 04 CSC
is queued up for August
Action of TAC requested
 CMWG (Criteria for Granting Zonal
Boundary Exceptions)
As Approved by WMS
Criteria for granting exemptions to mathematically determined
zonal boundaries:
•Not commercially significant
•For reason to keep a system intact rather than commercial gain
•Electrically near a zonal boundary
•Not opted in
•Not too big
•Not automatic
Proposed Motion
The TAC endorse the following criteria for granting exemptions
to mathematically determined zonal boundaries:
•Not commercially significant
•For reason to keep a system intact rather than commercial gain
•Electrically near a zonal boundary
•Not opted in
•Not too big
•Not automatic
WMS Action Items
 PRR404 Energy Procured From ERCOT
 Can a retail load chose not to used an
existing IDR meter for settlement
 PRR409 Voltage Support Services from
Generating Resources
 DAY Ahead Market Design Task Force
Can a premise have an IDR
settlement meter installed but
request that the billing
settlement be based on nonIDR data?
WMS voted to answer the question
NO
WMS Action Items
 PRR404 Energy Procured From ERCOT
 Can a retail load chose not to used an
existing IDR meter for settlement
 PRR409 Voltage Support Services from
Generating Resources
 DAY Ahead Market Design Task Force
Items Elsewhere on
the TAC Agenda
 Voltage and Reactive Requirements