3 Market Performance Metrics
Day-Ahead Prices
Figure 2 shows the daily simple average prices for all hours in IFM for each of the four default load-aggregation points (DLAP): PG&E, SCE, SDG&E, and VEA.
Day-Ahead DLAP prices on average decreased compared to the previous month, correlated with falling natural gas prices. Prices were less volatile compared to the previous month.
TABLE 3 below lists the binding constraints that resulted in relatively high or low DLAP prices on certain dates.
Figure 2: IFM (Day-Ahead) Simple Average DLAP Prices (All Hours)
| DLAP LMPs Affected | Dates | Transmission Constraint |
|---|---|---|
| All | December 4 | OMS 14407105_50001_NG_OOS_NG nomogram |
| PGAE; SDGE | December 5 | SUNCREST-SUNCREST-230 XFMR; TESLA-LOSBANOS-500kV line |
| PGAE | December 6-10 | TESLA-LOSBANOS-500kV line; PANOCHE-GATES-230kV line; GATES1-MIDWAY-500kV line |
| All | December 11 | SANMATEO-BELMONT-115kV line |
| PGAE; SDGE | December 12-13 | SUNCREST-SUNCREST-230 XFMR; GATES1-MIDWAY-500kV line |
| All | December 14 | TESLA-LOSBANOS-500kV line; SANMATEO-BELMONT-115kV line |
| All | December 18 | SANMATEO-BELMONT-115kV line |
| PGAE | December 20 | GATES1-MIDWAY-500kV line |
| PGAE | December 23-31 | GATES1-MIDWAY-500kV line; TESLA-LOSBANOS-500kV line; SANJCP-ESCNDO-230kV line |
Real-Time Price
Figure 3 shows daily simple average prices for all four DLAPs (PG&E, SCE, SDG&E, and VEA) for all hours respectively in FMM.
Compared to the previous month FMM DLAP prices on average decreased compared to the previous month, correlated with falling natural gas prices. Prices were less volatile compared to the previous month.
TABLE 4 below lists the binding constraints that resulted in relatively high or low DLAP prices on certain dates.
Figure 3: FMM Simple Average DLAP Prices (All Hours)
| DLAP LMPs Affected | Dates | Transmission Constraint |
|---|---|---|
| PGAE | December 2 | OMS-14384679_50001_OOS_NG nomogram |
| All | December 4 | TESLA-LOSBANOS-500kV line; SUNCREST-SUNCREST-230 XFMR |
| PGAE | December 5-10 | SUNCREST-SUNCREST-230 XFMR; TESLA-LOSBANOS-500kV line; GATES1-MIDWAY-500kV line; MOSSLD-LASAGUIL-230kV line |
| All | December 11 | GATES1-GATES-500 XFMR |
| SDGE | December 13 | SUNCREST-SUNCREST-230 XFMR |
| PGAE | December 15-17 | GATES1-MIDWAY-500kV line |
| SDGE | December 19-20 | ESCNDIDO-TALEGA-230kV line; SANJCP-ESCNDO-230kV line |
| PGAE | December 24-25 | GATES1-MIDWAY-500kV line; TESLA-LOSBANOS-500kV line |
Figure 4 below shows the daily frequency of positive price spikes and negative prices by price range for the DLAPs in the FMM.
The cumulative frequency of prices in FMM above $250/MWh decreased to 0 percent in December from 0.03 percent in the previous month, while the cumulative frequency of negative prices decreased to 3.05 percent in December from 4.21 percent in the previous month, correlated with the decrease in renewable generation curtailment.
Figure 4: Daily Frequency of FMM DLAP Positive Price Spikes and Negative Prices
Figure 5 shows daily simple average prices for all the DLAPs (PG&E, SCE, SDG&E, and VEA) for all hours respectively in RTD.
Compared to the previous month RTD DLAP prices on average decreased compared to the previous month, correlated with falling natural gas prices. Prices were less volatile compared to the previous month.
TABLE 5 below lists the binding constraints that resulted in relatively high or low DLAP prices on certain dates.
Figure 5: RTD Simple Average DLAP Prices (All Hours)
| DLAP LMPs Affected | Dates | Transmission Constraint |
|---|---|---|
| PGAE | December 2-3 | OMS-14384679_50001_OOS_NG nomogram |
| SDGE; PGAE; SCE | December 4 | SUNCREST-SUNCREST-230 XFMR |
| PGAE | December 5-10 | SUNCREST-SUNCREST-230 XFMR; CARIBOU-CARBOU-M-115 XFMR; TESLA-LOSBANOS-500kV line; GATES1-MIDWAY-500kV line; MOSSLD-LASAGUIL-230kV line |
| All | December 11-12 | GATES1-GATES-500 XFMR; ENCINATP-SANLUSRY-230kV line |
| SDGE | December 13 | SUNCREST-SUNCREST-230 XFMR |
| PGAE | December 15-17 | SANLUSRY-S.ONOFRE-230kV line; GATES1-MIDWAY-500kV line |
| SDGE | December 19-20 | ESCNDIDO-TALEGA-230kV line; SANJCP-ESCNDO-230kV line |
| PGAE | December 24-25 | GATES1-MIDWAY-500kV line; TESLA-LOSBANOS-500kV line |
Figure 6 below shows the daily frequency of positive price spikes and negative prices by price range for the DLAPs in RTD.
The cumulative frequency of prices in RTD above $250/MWh decreased to 0.05 percent in December from 0.12 percent in the previous month, while the cumulative frequency of negative prices decreased to 3.32 percent in December from 4.80 percent in the previous month, correlated with the decrease in renewable generation curtailment.
Figure 6: Daily Frequency of RTD DLAP Positive Price Spikes and Negative Prices
