5 Congestion Revenue Rights
Congestion Revenue Rights are a financial tool developed for the purpose of allowing load and exports to hedge against congestion charges paid when congestion occurs on a transmission line (aka congestion rents as was described in the previous section). If the congestion occurs in the same direction the CRR is held for the CRR holder is paid, but the CRR holder may have an obligation to pay if congestion occurs in the opposite direction.
Congestion revenue rights auction efficiency 1B became effective on January 1, 2019. It includes key changes related to the congestion revenue rights settlements process:
- Targeted reduction of congestion revenue rights payouts on a constraint by constraint basis.
- Distribute congestion revenues to the extent that CAISO collected the requisite revenue on the constraint over the month. That is, implement a pro-rata funding for CRRs.
- Allow surpluses on one constraint in one hour to offset deficits on the same constraint in another hour over the course of the month.
- Only distribute surpluses to congestion revenue rights if the surplus is collected on a constraint that the congestion revenue right accrued a deficit, and only up to the full target payment value of the congestion revenue right.
- Distribute remaining surplus revenue at the end of the month, which are associated with constraints that collect more surplus over the month than deficits, to measured demand.
Monthly CRR Revenue
Figure 11 illustrates the daily CRR notional value in the corresponding month for the various transmission elements that experienced congestion during the month. CRR notional value is calculated as the product of CRR implied flow (MW) and constraint shadow price ($/MWh) in each hour per constraint and CRR.
Figure 11: Daily CRR Notional Value by Transmission Element
Figure 12 illustrates the daily CRR offset value in the corresponding month for the transmission elements that experienced congestion during the month. CRR offset value is the difference between the revenue collected from the congestion and the CRR notional value. A positive CRR offset value represents surplus and a negative CRR offset value represents shortfall.
As shown below, table 6 shows the percentage of monthly CRR deficit by transmission element and Table 7 shows the percentage of monthly CRR surplus by transmission element.
Figure 12: Daily CRR Offset Value by Transmission Element
| Constraint | Percent |
|---|---|
| 7820_TL23040_IV_SPS_NG | 22.54 |
| 24801_DEVERS _500_24804_DEVERS _230_XF_1 _P | 19.61 |
| OMS IV-SX OUTAGE_NG | 10.10 |
| OMS_16800765_INYOKERN_NG_EX | 8.40 |
| 30765_LOSBANOS_230_30790_PANOCHE _230_BR_2 _1 | 8.40 |
| Other | 6.52 |
| MIGUEL_BKs_MXFLW_NG | 6.48 |
| 7820_TL 230S_OVERLOAD_NG | 5.75 |
| 30040_TESLA _500_30050_LOSBANOS_500_BR_1 _1 | 5.02 |
| 30790_PANOCHE _230_30900_GATES _230_BR_2 _1 | 4.23 |
| 7690-INYOKN_VOLTAGE_EX_NG | 2.95 |
| Constraint | Percent |
|---|---|
| IPPUTAH_ITC | 25.53 |
| Other | 21.31 |
| 30750_MOSSLD _230_30797_LASAGUIL_230_BR_1 _1 | 17.34 |
| 30060_MIDWAY _500_24156_VINCENT _500_BR_2 _3 | 9.67 |
| 31486_CARIBOU 115_30255_CARBOU M 1.0_XF_11 | 8.65 |
| 30790_PANOCHE _230_30900_GATES _230_BR_2 _1 | 7.84 |
| NdGrp: 22941_TULEW C1_34.5_B3 | 2.77 |
| 34716_LRDO JCT_115_34718_KERN OIL_115_BR_1 _1 | 2.57 |
| TL50001+TL50003_OOS_SLINE_IMP | 1.52 |
| HUMBOLDT_EXP_NG | 1.42 |
| 22652_PENSQTOS_230_22596_OLD TOWN_230_BR_1 _1 | 1.39 |
The main reasons for CRR offset shortfall were
- The nomogram 7820_TL23040_IV_SPS_NG was binding in 25 days of this month, resulting in offset shortfall of $5.18 million.
- *The transformer 24801_DEVERS _500_24804_DEVERS _230_XF_1 _P was binding in 19 days of this month, resulting in offset shortfall of $4.48 million.*
The main reason for CRR offset surplus were
- The IPPUTAH_ITC inertie was binding in 11 days of this month, resulting in offset surplus of $0.47 million.
- *The line 30750_MOSSLD _230_30797_LASAGUIL_230_BR_1 _1 was binding in 28 days of this month, resulting in offset surplus of $0.32 million.*
Table 8 shows the percentage of monthly CRR payment by transmission element.
| Constraint | Percent |
|---|---|
| 24801_DEVERS _500_24804_DEVERS _230_XF_1 _P | 23.03 |
| Other | 14.51 |
| 30750_MOSSLD _230_30797_LASAGUIL_230_BR_1 _1 | 11.15 |
| 30765_LOSBANOS_230_30790_PANOCHE _230_BR_2 _1 | 10.49 |
| 30040_TESLA _500_30050_LOSBANOS_500_BR_1 _1 | 10.34 |
| 7820_TL23040_IV_SPS_NG | 7.58 |
| 30790_PANOCHE _230_30900_GATES _230_BR_2 _1 | 6.00 |
| 99013_CAL CAPS_500_24801_DEVERS _500_BR_1 _1 | 5.04 |
| MIGUEL_BKs_MXFLW_NG | 4.89 |
| OMS IV-SX OUTAGE_NG | 4.49 |
| 7820_TL 230S_OVERLOAD_NG | 2.47 |
Table 9 shows the monthly CRR statistics. The Net Monthly Balancing Surplus calculates as CRR Surplus plus CRR Daily Balancing Account minus total auction revenue. The total auction revenue is the sum of Monthly Auction Revenue and Annual Auction Revenue. The Allocation to Measured demand is calculated as sum of total auction revenue and Net Monthly Balancing Surplus.
Net Monthly Balancing Surplus in January was -$2.79 million. The auction revenues credited to the balancing account for January were $8.59 million. As a result, the balancing account had a surplus of approximately $5.80 million in January compared to $6.25 million in the previous month, which was allocated to measured demand.
| Description | DECEMBER -2024 | JANUARY -2025 |
|---|---|---|
| CRR Notional Value | $28,708,708 | $66,639,563 |
| CRR Deficit | -$11,854,123 | -$22,848,975 |
| CRR Settlement Rule | -$1,031 | -$67,184 |
| CRR Adjusted Payment | $16,853,554 | $43,723,403 |
| CRR Surplus | $591,718 | $1,831,230 |
| Monthly Auction Revenue | $5,064,893 | $952,180 |
| Annual Auction Revenue | $2,804,423 | $7,641,859 |
| CRR Daily Balancing Account | $5,657,239 | $3,968,022 |
| Net Monthly Balancing Surplus | -$1,620,359 | -$2,794,787 |
| Allocation to Measured Demand | $6,248,957 | $5,799,252 |