|
 |
| |
| Notice |
|
|
December 4, 2019
|
REQUESTED ACTION
|
CATEGORIES
Market Operations
System Operations
|
Ancillary Services Scarcity Event on 11/20/19
|
MESSAGE
The California ISO has an ancillary services scarcity pricing mechanism in place that is triggered when the ISO is unable to procure the target quantity of one or more ancillary services in the integrated forward market or real-time market runs.
On Nov. 20, 2019, ancillary service scarcity occurred in the 15-minute market run for a total of 24 intervals in the following regions, services and quantities:
|
Trade Date
|
Hour Ending
|
Intervals
|
Ancillary Service
|
Region
|
Shortfall (MW)
|
Percentage of Requirement
|
|
Nov. 20
|
2,4,5,9,10,12
|
Various
|
Regulation Up
|
SP26_EXP
|
1 - 6.9
|
0.96 - 7.03%
|
|
Nov. 20
|
7,10,11,12,15,17
|
Various
|
Regulation Down
|
SP26_EXP
|
0.13 - 15.89
|
0.34 - 17.83%
|
The ISO confirmed the scarcity event during its price correction process. The published ancillary services prices correctly reflect the approved administrative set of scarcity prices.
|
CONTACT INFORMATION
|
|
California Independent System Operator | P.O. Box 639014 | Folsom, CA 95630 | United States
|
|
|
|
