BPA Area Control Error

BPA's Area Control Error (CPS ACE) at 1-minute and 10-minute averages from 2013, posted yearly under FERC Order 784.

BPAAncillary Services data BPA market

Query with the agent

Native record

resolution x averaging period start

1-minute publication cadence

Evidence

Observed market data

Published observations from the named source

Time basis

Point-in-time records

UTC · event_time

Overview

BPA's Area Control Error (CPS ACE) at 1-minute and 10-minute averages from 2013, posted yearly under FERC Order 784.

Query contract

Preserve one canonical row per (resolution_minutes, event_time) before aggregating.

Analysis rules

Filter one resolution_minutes value.

Interpretation

BPA prints Pacific prevailing time; event_time is UTC, resolved in file order across daylight-saving changes.
Posted yearly, months after the year ends; there is no current ACE here.

Access

Query from your own tools

Use the guarded HTTP endpoint directly, or connect an MCP client and load the dataset contract with describe_data before calling query_data.

BPA MCP API reference

HTTP endpoint

POST /api/v1/datasets/bpa_area_control_error/query

Schema7

Column

Type

event_timeDateTime64(6, 'UTC')

resolution_minutesInt32

ace_mwNullable(Float64)

value_textNullable(String)

pi_tagNullable(String)

source_fileString

ingested_atDateTime64(6, 'UTC')

Sample data

No preview available.

Coverage

No time-indexed data — coverage isn’t applicable to this dataset.

Related ancillary services data

Related ancillary services data
Dataset	Description
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Ancillary Service Market Clearing PricesSPP · 5-minute (RTBM) and hourly (Day-Ahead)	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.
Ancillary Service PricesERCOT · hourly (DAM)	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.
Ancillary-Service Clearing PricesCAISO · hourly	CAISO ancillary-service market clearing prices by delivery hour, market run, region, and product. Despite the legacy column name mw_or_price, values in this table are prices in USD/MWh; zero is a valid clearing price.