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Ancillary Services

Cleared prices and quantities for the reserve and regulation products a market procures alongside energy: the capacity held in reserve for frequency control and contingency response, priced separately from the energy itself.

30 datasetspublished by ATG DataISONE19ERCOT3NYISO3SPP3MISO1CAISO1

Ancillary Services datasets
DatasetRows
SPPAncillary Service Market Clearing PricesATG Data·SPP·Cleared ancillary-service prices by SPP reserve zone for both the real-time balancing market and the day-ahead market. SPP's product set does not map onto other ISOs': regulation clears as a separate service (capacity) price and mileage price in each direction (reg_up_service, reg_up_mile, reg_dn_service, reg_dn_mile), alongside ramp up and down, spinning, supplemental, and uncertainty products. IMPORTANT: reserve_zone mixes two grains. It carries the numeric ancillary reserve zones (1 through 5 under the SPP balancing authority, 21 under the separate SWPW balancing authority) AND the two balancing-authority roll-ups, 'SPP' and 'SWPW', whose prices equal those of their member zones. Aggregating across every value of reserve_zone double-counts the market.6.3M2017
ERCOTAncillary Service PricesATG Data·ERCOT·Hourly market clearing prices for the ancillary services ERCOT procures alongside energy in its Day-Ahead Market, broken out by product: Regulation Up (RegUp), Regulation Down (RegDown), Responsive Reserve (RRS), Non-Spinning Reserve (NSPIN), and the ERCOT Contingency Reserve Service (ECRS). These prices represent what the grid pays per megawatt to hold capacity in reserve for frequency control and contingency response, separate from the energy itself. Watching them shows when reserves are scarce and expensive (often during tight or volatile conditions), which informs how generators and storage operators allocate capacity between energy and reserve markets, and gives researchers a read on the cost of keeping the Texas grid reliable. ECRS, added in 2023, is the newest of these products and has at times cleared at notably high levels.367.6K2017
CAISOCAISO Day-Ahead Ancillary PricesATG Data·CAISO·Cleared day-ahead ancillary-service capacity prices in CAISO, one row per hour, AS region and product. 2,172,326 rows, 2014-12 to now. Products: reg_up, reg_down, spin, non_spin, reg_mileage_up, reg_mileage_down. 12 CAISO ancillary-service regions (AS_CAISO, AS_NP26, AS_SP26 and their expanded variants). The expanded regions overlap the base ones by design — never sum across regions. price_usd_mw is a price for CAPACITY held in reserve — dollars per megawatt of commitment — not dollars per megawatt-hour of energy delivered. The two are different units and are not comparable to an LMP.2.2M2014
ISO-NECapacity ScarcityATG Data·ISONE·ISO-NE's published Capacity Scarcity source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.1542026
SPPCleared Operating ReservesATG Data·SPP·Cleared ancillary-service quantities in MW by SPP reserve zone: regulation up and down, ramp up and down, spinning, supplemental, and both uncertainty products (unc_up and the short-term sts_unc_up). The quantity counterpart to the ancillary clearing prices. The same reserve_zone caveat applies: the column carries both the numeric reserve zones and the 'SPP' and 'SWPW' balancing-authority roll-ups, so aggregating across every value double-counts.6.2M2017
ISO-NEDAAS Reserve DataATG Data·ISONE·ISO-NE's published DAAS Reserve Data source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.4.0K2026
ISO-NEDAAS Strike PricesATG Data·ISONE·ISO-NE's published DAAS Strike Prices source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.4.0K2026
ERCOTDAM Total AS SoldATG Data·ERCOT·This dataset reports the total quantity of ancillary services ERCOT procured in its Day-Ahead Market, broken out by product (such as Regulation Up, Regulation Down, Responsive Reserve, ECRS, and Non-Spinning Reserve) for each delivery hour. These figures show how much reserve capability ERCOT set aside to keep supply and demand balanced and to respond to contingencies, separate from the energy cleared for actual generation. Paired with the per-product clearing prices, the cleared volumes let traders, researchers, and the public see how reserve requirements shift hour to hour and how much of the market's capacity is committed to grid reliability rather than energy. The data comes from ERCOT report NP4-532-CD (DAM Total AS Sold) and updates with each day-ahead market run.61.2K2025
NYISODay-Ahead Ancillary Service PricesATG Data·NYISO·NYISO day-ahead ancillary-service prices by pricing location, keyed by PTID, with separate columns for 10-minute spinning reserve, 10-minute non-synchronous reserve, 30-minute operating reserve, and regulation capacity. These prices show the reserve and regulation stack cleared before the operating day, complementing day-ahead energy LBMP for full market-context analysis.1.1M1999
ERCOTERCOT Day-Ahead Ancillary PricesATG Data·ERCOT·Cleared day-ahead ancillary-service capacity prices in ERCOT, one row per hour and product. 365,717 rows, 2017-01 to the next delivery day. Products: reg_up, reg_down, spin, non_spin, ecrs. ERCOT procures ancillary services system-wide, so there is no region column — one price per product per hour. price_usd_mw is a price for CAPACITY held in reserve — dollars per megawatt of commitment — not dollars per megawatt-hour of energy delivered. The two are different units and are not comparable to an LMP.366.8K2017
ISO-NEFCM ABPATG Data·ISONE·ISO-NE's published FCM ABP source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.992026
ISO-NEFCM ARAATG Data·ISONE·ISO-NE's published FCM ARA source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.992026
ISO-NEFCM MBPATG Data·ISONE·ISO-NE's published FCM MBP source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.1002026
ISO-NEFCM MRAATG Data·ISONE·ISO-NE's published FCM MRA source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.1012026
ISO-NEForecast CapacityATG Data·ISONE·ISO-NE's published Forecast Capacity source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.1.8K2026
ISO-NEHB DAAS ARD OfferATG Data·ISONE·ISO-NE's published HB DAAS ARD Offer source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.1.7K2026
ISO-NEHB DAAS DRR OfferATG Data·ISONE·ISO-NE's published HB DAAS DRR Offer source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.1.7K2026
ISO-NEHB DAAS Energy OfferATG Data·ISONE·ISO-NE's published HB DAAS Energy Offer source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.1552026
ISO-NEHB FCM ARAATG Data·ISONE·ISO-NE's published HB FCM ARA source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.17.4K2026
ISO-NEHB FCM MRAATG Data·ISONE·ISO-NE's published HB FCM MRA source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.4172020
ISO-NEHB Regulation OfferATG Data·ISONE·ISO-NE's published HB Regulation Offer source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.4.8M2022
MISOLive Ancillary-Service PricesATG Data·MISO·Real-time and day-ahead ancillary-service clearing prices for each of MISO's eight reserve zones. Keep zone and product explicit; averaging reserve-zone prices would create a market-wide price MISO does not publish.77.8K2026
ISO-NENext Day Capacity ReportATG Data·ISONE·ISO-NE's published Next Day Capacity Report source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.1102026
NYISONYISO Day-Ahead Ancillary PricesATG Data·NYISO·Cleared day-ahead ancillary-service capacity prices in NYISO, one row per hour, zone and product. 3,918,376 rows, 2016-06 to the next delivery day. Products: spin, non_spin, operating_30, reg_capacity. 11 NYISO zones. price_usd_mw is a price for CAPACITY held in reserve — dollars per megawatt of commitment — not dollars per megawatt-hour of energy delivered. The two are different units and are not comparable to an LMP.3.9M2016
ISO-NEOperating Reserve DA HourlyATG Data·ISONE·ISO-NE's published Operating Reserve DA Hourly source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.01970
ISO-NEOperating Reserve RT HourlyATG Data·ISONE·ISO-NE's published Operating Reserve RT Hourly source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.01970
NYISOReal-Time Ancillary Service PricesATG Data·NYISO·NYISO real-time ancillary-service prices by pricing location, keyed by PTID, with separate columns for 10-minute spinning reserve, 10-minute non-synchronous reserve, 30-minute operating reserve, regulation capacity, and regulation movement. Use this with energy LBMP when analyzing reserve scarcity, regulation value, or storage/operator behavior beyond energy-only dispatch.15.2M2000
ISO-NEReserve Price Hourly FinalATG Data·ISONE·ISO-NE's published Reserve Price Hourly Final source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.152.3K2022
ISO-NEReserve Price Hourly PrelimATG Data·ISONE·ISO-NE's published Reserve Price Hourly Prelim source feed. This catalog page exposes the physical schema, coverage, and latest source rows without inventing a normalized grain for publisher-shaped snapshot fields. Use the documented key and event time when comparing revisions or vintages.41.9K2022
SPPSPP Day-Ahead Ancillary PricesATG Data·SPP·Cleared day-ahead ancillary-service capacity prices in SPP, one row per hour, reserve zone and product. 3,389,365 rows, 2017-01 to the next delivery day. Products: reg_up, reg_down, spin, supplemental, ramp_up, ramp_down, uncertainty_up. 8 SPP reserve zones. price_usd_mw is a price for CAPACITY held in reserve — dollars per megawatt of commitment — not dollars per megawatt-hour of energy delivered. The two are different units and are not comparable to an LMP.3.4M2017