NOTICE DATE: December 31, 2018
NOTICE TYPE: W-A123118-01 Operations
SHORT DESCRIPTION:
Change to maximum Shadow Prices for constraints previously determined as irresolvable by SCED
INTENDED AUDIENCE:
ERCOT Market Participants
DAY AFFECTED: January 1, 2019 and January 30, 2019
LONG DESCRIPTION:
Section 3.6.2 of the Other Binding Document, Methodology for Setting Maximum Shadow Prices for Network and Power Balance Constraints, requires ERCOT to review annually each constraint previously determined irresolvable by Security-Constrained Economic Dispatch
(SCED) and determine (1) if the constraint has become SCED-resolvable, and if not, (2) re-determine the maximum Shadow Price.
Effective January 1, 2019, the following changes will be made to the set of constraints that remain consistently irresolvable by SCED:
|
Contingency Name |
Constraint
Name |
From Station / kV |
Description |
Current Maximum Shadow Price ($/MWh) |
Maximum Shadow Price Effective 1/1/19 ($/MWh) |
|
BASE CASE |
VALIMP |
N/A |
Valley Import Base Case |
2,000.00 |
2,000.00 |
|
SJUNYEL9 |
HEXT_YELWJC1_1 |
YELWJCKT / 69 |
Loss of Yellow Jacket to Junction 69KV line overloading the Yellow Jacket to Hext LCRA 69 kV line |
2,000.00 |
2,000.00 |
|
SWINYUC8 |
M_69_F3_1 |
WICKETT / 69 |
Loss of the 138 kV line from Wink Sub to Yucca Drive Switch overloading the 69 kV line from Wickett TNP to Winkler County 6 TNP |
2,000.00 |
2,800.00 |
|
DCASTXR8 |
MHONDOCR_1 |
MOORE / 138 |
Loss of the 138 kV double-circuit from Razorback/Txresrch to Castrvll overloading the 138 kV line from Moore Switching Station to Hondo Creek Switching
Station |
2549.21 |
3500 |
|
SWCSBOO8 |
BARL_FTSW1_1 |
FTSW / 69 |
Loss of the 138 kV line from Fort Stockton Plant to Barilla and Solstice overloading the 69 kV line from Barilla to Fort Stockton Switch |
2,800.00 |
2,800.00 |
Additionally, effective January 30, 2019, the following constraints will no longer be considered irresolvable by SCED:
|
Contingency Name |
Constraint Name |
From Station / kV |
Description |
|
SBAKHL48 |
6596__F |
HLTSW / 69 |
Loss of Bakke Tap to Unocal Parker Bakke 138 kV line overloading the 69 kV line from Emma Tap to Holt Switch |
|
SWCSBOO8 |
6332__A |
YUCSW / 138 |
Loss of Solstice to Fort Stockton Plant 138 kV line overloading the 138 kV line from Yucca Drive Switch to Gas Pad
|
Section 3.6 of the Other Binding Document requires a 30-day notice before the Shadow Price caps for SCED-resolvable constraints are reset to their default values. Accordingly, the identified constraints will have
their Shadow Price caps reset to their default Shadow Price cap values on January 30, 2019.
Per Section 3.6.3 of the Other Binding Document, the net margin values for constraints that remain irresolvable by SCED will be reset to zero on January 1, 2019.
ADDITIONAL INFORMATION: The Other Binding Document,
Methodology for Setting Maximum Shadow Prices for Network and Power Balance Constraints, may be found on the
Other Binding Documents List page of the ERCOT website.
CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email
at [log in to unmask].
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