Overview
CAISO OASIS 5-minute real-time interval shadow prices on nomogram constraints. A nomogram is a multi-element stability or transfer limit (a relationship across several branches or interfaces rather than a single line), so a binding nomogram shadow price flags where a security constraint — not just one overloaded line — is driving congestion cost. Useful for understanding structural transmission limits and stability-driven congestion in the CAISO footprint, complementing the single-branch and intertie shadow prices. History spans 2015 to present at ~99% daily coverage. The official source is CAISO OASIS.
Use with MCP
This table is available through the signed-in, read-only Ask the Grid MCP server. Connect a market below, then use search_data or describe_data to load its query contract before calling query_data.
Schema5
event_timeDateTime64(6, 'UTC')nomogram_idLowCardinality(String)prcNullable(Float64)constraint_causeNullable(String)ingested_atDateTime64(6, 'UTC')Sample rows
| event_time | nomogram_id | prc | constraint_cause | ingested_at |
|---|---|---|---|---|
| 2026-08-15 06:25:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 38.90719 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 06:20:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 38.87431 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 06:15:00.000000 | 7690-CONTRL-INYOKN_EXP_NG | -15.5617 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 06:15:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 38.9211 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 06:15:00.000000 | 7690-CONTRL-INYOKN_EXP_NG | -15.5617 | Base Case | 2026-08-15 06:17:46.049021 |
| 2026-08-15 06:15:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 38.9211 | Base Case | 2026-08-15 06:17:46.049021 |
| 2026-08-15 06:10:00.000000 | 7690-CONTRL-INYOKN_EXP_NG | -75.48342 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 06:10:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 39.46213 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 06:10:00.000000 | 7690-CONTRL-INYOKN_EXP_NG | -75.48342 | Base Case | 2026-08-15 06:17:46.049021 |
| 2026-08-15 06:10:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 39.46213 | Base Case | 2026-08-15 06:17:46.049021 |
| 2026-08-15 06:05:00.000000 | 7690-CONTRL-INYOKN_EXP_NG | -349.44615 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 06:05:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 39.78248 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 06:05:00.000000 | 7690-CONTRL-INYOKN_EXP_NG | -349.44615 | Base Case | 2026-08-15 06:17:46.049021 |
| 2026-08-15 06:05:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 39.78248 | Base Case | 2026-08-15 06:17:46.049021 |
| 2026-08-15 06:00:00.000000 | 7690-CONTRL-INYOKN_EXP_NG | -306.78568 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 06:00:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 38.91084 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 06:00:00.000000 | 7690-CONTRL-INYOKN_EXP_NG | -306.78568 | Base Case | 2026-08-15 06:17:46.049021 |
| 2026-08-15 06:00:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 38.91084 | Base Case | 2026-08-15 06:17:46.049021 |
| 2026-08-15 05:55:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 37.99068 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 05:55:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 37.99068 | Base Case | 2026-08-15 06:17:46.049021 |
| 2026-08-15 05:50:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 38.18594 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 05:50:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 38.18594 | Base Case | 2026-08-15 06:17:46.049021 |
| 2026-08-15 05:45:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 38.15147 | Base Case | 2026-08-15 06:27:48.363370 |
| 2026-08-15 05:45:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 38.15147 | Base Case | 2026-08-15 06:17:46.049021 |
| 2026-08-15 05:40:00.000000 | 35202_USWP-WKR_60.0_33777_SBTAP _60.0_BR_1 _1 | 38.45724 | Base Case | 2026-08-15 06:27:48.363370 |