6 Ancillary Services
IFM Procurement and Prices
Table 10 shows the monthly IFM average ancillary service procurement and Table 11 shows the monthly average prices.
In February the monthly average procurement decreased slightly for regulation up, but rose for regulation down, spinning reserves and non-spinning reserves. The monthly average prices for regulation down, regulation up and spinning reserves all fell in February, but prices for non-spinning reserves increased.
| Month | Jan-2023 | Feb-2023 | Percent Change |
|---|---|---|---|
| Regulation_Up | 586 | 632 | 7.8% |
| Regulation_Down | 874 | 980 | 12.1% |
| Spin | 909 | 871 | -4.2% |
| Non-Spin | 997 | 987 | -1.0% |
| Month | Jan-2023 | Feb-2023 | Percent Change |
|---|---|---|---|
| Non-Spin | $6.07 | $4.44 | -26.9% |
| Regulation_Down | $8.57 | $8.65 | 1.0% |
| Regulation_Up | $14.43 | $8.79 | -39.1% |
| Spin | $7.46 | $5.19 | -30.4% |
Figure 13 shows the daily IFM average ancillary service prices. The average prices were generally stable with no unusual behavior this month.
Figure 13: IFM (Day-Ahead) Ancillary Service Average Price
Scarcity Events
The ancillary services scarcity pricing mechanism is triggered when the ISO is not able to procure the target quantity of one or more ancillary services in the IFM and real-time market runs. The scarcity events in this month are shown in Table 12 below.
| Date | Hour Ending | Interval | Ancillary Service | Region | Shortfall | Percentage of requirement |
|---|---|---|---|---|---|---|