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This vignette maps each aemo package function to the
underlying AEMO table, lists the key columns returned, and defines the
units and conventions. Use it alongside the AEMO Market Management
System Data Model (MMSDM) Data Model documentation, which is the
authoritative source.
Timezone. All settlementdate and
timestamp columns are POSIXct in
"Australia/Brisbane" (AEST, UTC+10, no daylight saving).
See vignette("timestamps") for details.
Period-ending. A row stamped 14:05:00
covers the interval ending at 14:05 (i.e. 14:00:01 to 14:05:00
inclusive).
INTERVENTION. All data functions default to
intervention = FALSE, returning only the market pricing run
(INTERVENTION = 0). Pass intervention = TRUE
to include physical/intervention runs.
Types. All numeric columns are coerced from the raw
character output of the AEMO CSV files. Timestamps are POSIXct. ID
columns (regionid, duid,
constraintid, etc.) remain character.
GST. All NEM wholesale prices in AEMO’s feeds, and
therefore in every aemo_tbl, are exclusive of GST
(NER Chapter 10, definition of “spot price”). When comparing revenue
figures to published financial statements or retail prices, gross up by
1.10 as appropriate.
aemo_price() : DISPATCHPRICE / TRADINGPRICESource tables: - 5-min: DISPATCH_PRICE
from DISPATCHIS_Reports - 30-min pre-5MS:
TRADING_PRICE from TRADINGIS_Reports - 30-min
post-5MS (from 1 Oct 2021): aggregated from
DISPATCH_PRICE
| Column | Type | Unit | Description |
|---|---|---|---|
settlementdate |
POSIXct | AEST | Period-ending timestamp |
regionid |
character | - | NEM region (e.g. "NSW1") |
rrp |
numeric | AUD/MWh | Regional Reference Price : the spot price used in settlement |
raise6secrrp |
numeric | AUD/MW | FCAS Raise 6-second service price (market run) |
lower6secrrp |
numeric | AUD/MW | FCAS Lower 6-second service price |
raise60secrrp |
numeric | AUD/MW | FCAS Raise 60-second service price |
lower60secrrp |
numeric | AUD/MW | FCAS Lower 60-second service price |
raise5minrrp |
numeric | AUD/MW | FCAS Raise 5-minute service price |
lower5minrrp |
numeric | AUD/MW | FCAS Lower 5-minute service price |
raiseregrrp |
numeric | AUD/MW | FCAS Regulation Raise price |
lowerregrrp |
numeric | AUD/MW | FCAS Regulation Lower price |
raise1secrrp |
numeric | AUD/MW | FCAS Very Fast Raise (from 9 Oct 2023) |
lower1secrrp |
numeric | AUD/MW | FCAS Very Fast Lower (from 9 Oct 2023) |
intervention |
character | 0/1 | 0 = market pricing run; 1 = physical/intervention run |
The rrp column may occasionally equal the Market Price
Cap (MPC, ~AUD 17,500/MWh) or Market Price Floor (MPF, -AUD 1,000/MWh).
See aemo_price_caps() for the exact values by financial
year.
aemo_demand() : DISPATCHREGIONSUMSource table: DISPATCH_REGIONSUM from
DISPATCHIS_Reports
| Column | Type | Unit | Description |
|---|---|---|---|
settlementdate |
POSIXct | AEST | Period-ending timestamp |
regionid |
character | - | NEM region |
demand_mw |
numeric | MW | The requested demand measure (see below) |
totaldemand |
numeric | MW | Operational demand: grid-measured, met by scheduled/semi-scheduled gen |
ss_solar_uigf |
numeric | MW | Semi-scheduled solar UIGF (used for
operational_less_snsg) |
ss_wind_uigf |
numeric | MW | Semi-scheduled wind UIGF |
measure argument: -
"operational": TOTALDEMAND : what AEMO
dispatches against - "operational_less_snsg":
TOTALDEMAND minus semi-scheduled solar + wind UIGF -
"native": TOTALDEMAND plus estimated rooftop
PV : closest to actual end-use consumption
aemo_dispatch_units() : DISPATCH_UNIT_SCADA /
DISPATCHLOAD| Column | Type | Unit | Description |
|---|---|---|---|
settlementdate |
POSIXct | AEST | Period-ending timestamp |
duid |
character | - | Dispatchable Unit Identifier |
scadavalue |
numeric | MW | Actual SCADA output (when measure = "scada_mw") |
totalmw |
numeric | MW | Dispatch target MW (when measure = "target_mw", from
DISPATCHLOAD) |
aemo_constraints() : DISPATCHCONSTRAINTSource table: DISPATCH_CONSTRAINT from
DISPATCHIS_Reports
| Column | Type | Unit | Description |
|---|---|---|---|
settlementdate |
POSIXct | AEST | Period-ending timestamp |
constraintid |
character | - | Generic constraint ID (e.g. "N>>N-NIL_1") |
rhs |
numeric | MW or other | Right-hand side of the constraint (thermal limit, voltage limit, etc.) |
marginalvalue |
numeric | AUD/MWh | Shadow price on the constraint. Non-zero means the constraint is binding. The sum of marginalvalues across all binding constraints at a Regional Reference Node equals the network component of the regional price. |
violationdegree |
numeric | MW | How far the constraint was violated (should be zero in a normal dispatch) |
lhs |
numeric | MW or other | Left-hand side value (the actual flow or sum of flows) |
min_marginal_value = 0.01 (default) suppresses rows
where the shadow price rounds to zero : these are near-binding
constraints not actively driving price.
aemo_gencon() : GENCONDATASource table: GENCONDATA from MMSDM
archive
| Column | Type | Description |
|---|---|---|
genconid |
character | Constraint equation ID : matches constraintid in
DISPATCHCONSTRAINT |
constrainttype |
character | "LE" (≤), "GE" (≥), or "EQ"
(=) |
description |
character | Plain-language description of what the constraint models |
genericconstraintrhs |
numeric | Default RHS value (may be overridden in real-time by GENCONSETINVOKE) |
effectivedate |
POSIXct | Date from which this equation definition applies |
aemo_fcas_enablement() : DISPATCHLOADSource table: DISPATCH_UNIT_SOLUTION
from DISPATCHIS_Reports
| Column | Type | Unit | Description |
|---|---|---|---|
settlementdate |
POSIXct | AEST | Period-ending timestamp |
duid |
character | - | DUID |
raise1secmw |
numeric | MW | Very Fast Raise enabled MW (from 9 Oct 2023) |
lower1secmw |
numeric | MW | Very Fast Lower enabled MW |
raise6secmw |
numeric | MW | Fast Raise enabled MW |
lower6secmw |
numeric | MW | Fast Lower enabled MW |
raise60secmw |
numeric | MW | Slow Raise enabled MW |
lower60secmw |
numeric | MW | Slow Lower enabled MW |
raise5minmw |
numeric | MW | Delayed Raise enabled MW |
lower5minmw |
numeric | MW | Delayed Lower enabled MW |
raiseregmw |
numeric | MW | Regulation Raise enabled MW |
lowerregmw |
numeric | MW | Regulation Lower enabled MW |
aemo_interconnector() : DISPATCHINTERCONNECTORRES| Column | Type | Unit | Description |
|---|---|---|---|
settlementdate |
POSIXct | AEST | Period-ending timestamp |
interconnectorid |
character | - | Interconnector ID (e.g. "NSW1-QLD1",
"V-SA") |
mwflow |
numeric | MW | Actual MW flow (positive = export from
from_region) |
mwlosses |
numeric | MW | MW losses on the interconnector |
exportlimit |
numeric | MW | Export limit in this interval |
importlimit |
numeric | MW | Import limit in this interval |
aemo_mlf() : MARGINALLOSSFACTOR| Column | Type | Description |
|---|---|---|
financial_year |
character | NEM financial year, e.g. "2024-25" (1 July to 30
June) |
duid |
character | DUID |
connectionpointid |
character | Connection point ID |
regionid |
character | NEM region |
mlf |
numeric | Marginal Loss Factor. A value of 0.97 means the generator receives
97% of the regional RRP per MWh. Used in settlement:
payment = MWh × RRP × MLF × DLF. |
aemo_dlf() : LOSSFACTORMODEL| Column | Type | Description |
|---|---|---|
financial_year |
character | NEM financial year |
connectionpointid |
character | Connection point ID |
dlf |
numeric | Distribution Loss Factor. Combined with MLF to give total loss factor (TLF = MLF × DLF). |
aemo_price_caps() : static reference| Column | Type | Description |
|---|---|---|
year |
character | Financial year, e.g. "2024-25" |
market_price_cap_aud_per_mwh |
numeric | Market Price Cap (MPC) : maximum spot price. Any RRP equal to this value is a cap event. |
market_price_floor_aud_per_mwh |
numeric | Market Price Floor (MPF) : minimum spot price (AUD -1,000/MWh since 2013). |
cumulative_price_threshold_aud |
numeric | Cumulative Price Threshold (CPT) : when rolling-7-day regional CPT is breached, the Administered Price Cap (APC) activates. |
administered_price_cap_aud_per_mwh |
numeric | Administered Price Cap (APC) : price ceiling during CPT-triggered suspension (AUD 300/MWh). |
aemo_units() : DUDETAILSUMMARY| Column | Type | Description |
|---|---|---|
duid |
character | Dispatchable Unit Identifier : the primary key used in all dispatch tables |
stationid |
character | Station (power plant) ID : multiple DUIDs may share one station |
regionid |
character | NEM region |
dispatchtype |
character | "GENERATOR" or "LOAD" |
schedule_type |
character | "SCHEDULED", "SEMI-SCHEDULED", or
"NON-SCHEDULED" |
connectionpointid |
character | Connection point : used to look up MLF/DLF |
start_date |
POSIXct | Registration start date |
end_date |
POSIXct | Registration end date (NA = currently active) |
aemo_outages() : NETWORK_OUTAGEDETAIL| Column | Type | Description |
|---|---|---|
outageid |
character | Unique outage identifier |
starttime |
POSIXct | Outage start (AEST) |
endtime |
POSIXct | Outage end (AEST, NA if still open) |
substationid |
character | Substation ID |
equipmenttype |
character | Type of network element (e.g. "LINE",
"TRANSFORMER") |
equipmentid |
character | Specific element ID |
outagetype |
character | "PLANNED" or "FORCED" |
regionid |
character | NEM region |
restarttimeunknown |
character | "Y" if the end time is uncertain |
aemo_participants() : PARTICIPANT +
DUDETAILSUMMARY| Column | Type | Description |
|---|---|---|
participantid |
character | AEMO participant identifier (company code) |
participantclassid |
character | "GENERATOR", "LOAD",
"TRADER", etc. |
name |
character | Company name |
duid |
character | DUID registered to this participant |
stationid |
character | Station ID |
regionid |
character | NEM region |
dispatchtype |
character | "GENERATOR" or "LOAD" |
schedule_type |
character | Schedule classification |
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.