aemo_price: Wholesale electricity prices

In aemo: Download Australian Energy Market Operator Data

Wholesale electricity prices

Description

Returns 5-minute dispatch prices or 30-minute trading prices for a NEM region over a specified window. Filters intervention runs by default so the returned prices are the market clearing prices used in settlement.

Usage

aemo_price(
  region,
  start,
  end,
  interval = c("5min", "30min"),
  market = c("energy", "fcas"),
  intervention = FALSE
)

Arguments

region	One of "NSW1", "QLD1", "SA1", "TAS1", "VIC1". Accepts a vector.
start, end	Start and end times (inclusive). Character (parsed as AEST) or POSIXct.
interval	One of "5min" (default) or "30min".
market	One of "energy" (default, returns RRP) or "fcas" (returns the FCAS service RRPs).
intervention	Logical. FALSE (default) returns only the market pricing run; TRUE returns both market and physical runs, with the intervention column preserved.

Details

Timestamps are AEST (UTC+10, no daylight savings) to match AEMO's market clock. See the package-level documentation for the period-ending timestamp convention (a row stamped 00:05 is the 5-minute period ending at 00:05).

Intervention. DISPATCHPRICE contains both market pricing runs (INTERVENTION = 0) and physical / intervention runs (INTERVENTION = 1). The default filters to market runs. Pass intervention = TRUE to get both.

30-minute settlement and the 5MS transition. Before 1 October 2021 the NEM settled on 30-minute trading prices from TRADINGPRICE (TRADINGIS). On 1 October 2021 five-minute settlement (5MS) commenced and settlement moved to native 5-minute prices. When interval = "30min":

• For the pre-5MS period (start < 2021-10-01): prices are read from TRADINGIS (TRADINGPRICE).

• For the post-5MS period: prices are derived by taking the arithmetic mean of the six 5-minute dispatch prices within each 30-minute trading interval, consistent with how AEMO calculates the TRADINGPRICE column in TradingIS post-5MS.

Data availability. NEMweb Current-directory files retain the last ~30 days of 5-minute dispatch files. Historical queries use the Archive daily-rollup files automatically; for queries older than the Archive window, use aemo_nemweb_download() with an MMSDM URL directly.

Value

An aemo_tbl. Key columns include settlementdate (POSIXct AEST), regionid, rrp (AUD/MWh, energy) or the FCAS service RRPs (AUD/MW), and intervention.

Source

AEMO NEMweb http://nemweb.com.au, AEMO Copyright Permissions Notice.

See Also

Other price: aemo_fcas()

Examples

op <- options(aemo.cache_dir = tempdir())
try({
  now <- Sys.time()
  p <- aemo_price("NSW1", now - 3600, now)
  head(p)
})
options(op)

aemo documentation built on April 29, 2026, 1:07 a.m.