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ANCILLARY_RECOVERY_SPLIT

ANCILLARY_RECOVERY_SPLIT holds the actual customer portion for each service and payment type. A single EFFECTIVEDATE/VERSIONNO combination applies to all services (i.e. the latest EFFECTIVEDATE/VERSIONNO is not retrieved for a single service, but applies to a data set).

ANCILLARY_RECOVERY_SPLIT is public data, and is available to all participants.

Source

This table is updated infrequently.

Column Schema

EFFECTIVEDATE

Calendar settlement date record becomes effective.

SQL Type: DATE Polars Type: pl.Date()

This column is mandatory, and a primary key.

Example: 2000/07/01 00:00:00

Note that AEMO represents dates as datetimes with a midnight time component.

PAYMENTTYPE

A payment type associated with the service (can be ENABLING, AVAILABILITY, USAGE, or COMPENSATION).

SQL Type: VARCHAR2(20) Polars Type: pl.Categorical

This column is mandatory, and a primary key.

Examples:

  • AVAILABILITY
  • COMPENSATION
  • ENABLING
  • ENABLING60L
  • ENABLING60R
  • ENABLING6L
  • ENABLING6R
  • LOWER1SEC
  • LOWER5MIN
  • LOWER60SEC

SERVICE

Ancillary service name (e.g. AGC, FCASCOMP)

SQL Type: VARCHAR2(10) Polars Type: str

This column is mandatory, and a primary key.

Examples:

  • AGC
  • FCAS
  • FCASCOMP
  • GOVERNOR
  • LOADSHED
  • REACTIVE
  • RESTART
  • RGUL
  • RGUU

VERSIONNO

Version number of the record for the given date.

SQL Type: NUMBER(3,0) Polars Type: pl.UInt16

This column is mandatory, and a primary key.

Example: 1

ACE_PORTION

The percentage value of the recovery funded using the ACE MWh Values. This field is only used for Settlement post IESS rule effective date.

SQL Type: NUMBER(18,8) Polars Type: pl.Float64

This column is not mandatory.

Examples: 0, 50, 100

CUSTOMER_PORTION

The percentage value of the recovery funded by market customers.

SQL Type: NUMBER(8,5) Polars Type: pl.Float64

This column is not mandatory.

Examples: 0, 50, 100

LASTCHANGED

Last date and time record changed

For more information, see the dedicated documentation page.

SQL Type: DATE Polars Type: pl.Datetime()

This column is not mandatory.

Example: 2003/06/03 09:46:25

New Data Timing

Updated infrequently. Occurs when details change

Code Examples

Polars

Casting is enums, categoricals etc is not essential, but may speed up parsing. Swapping int for pl.UInt16, pl.Int32 would also speed up parsing. However some of the datatypes are inferred, so they may be wrong.

This code deduplicates for you. Deduplication is normally only required across multiple months.

This code assumes that all columns are present, which may not be true for older files.

import polars as pl
import polars.selectors as cs

# e.g. "2029/03/15 00:05:00"
dt_s_fmt = "%Y/%m/%d %H:%M:%S"

# Dates are represented as datetimes at midnight

d_fmt = "%Y/%m/%d 00:00:00"

csv_paths = ["SOMEFILE.CSV", "OTHERFILE.CSV"]

lf = (
    pl.concat(
        [
            pl.scan_csv(
                csv_path,  # must be unzipped beforehand
                skip_rows=1,  # skip the header
                infer_schema=False,  # much faster
            )
            .filter(cs.by_index(0) == "D")  # drop the footer
            .select(~cs.by_index(range(4)))  # drop metadata columns
            for csv_path in csv_paths
        ],
        how="diagonal_relaxed",
    )
    .with_columns(
        pl.col("LASTCHANGED").str.strptime(pl.Datetime, dt_s_fmt),
        pl.col("EFFECTIVEDATE").str.strptime(pl.Date, d_fmt),
    )
    .cast(
        {
            "EFFECTIVEDATE": pl.Date(),
            "PAYMENTTYPE": pl.Categorical,
            "SERVICE": str,
            "VERSIONNO": int,  # or pl.UInt16
            "ACE_PORTION": pl.Float64,
            "CUSTOMER_PORTION": pl.Float64,
        }
    )
    # Deduplicate
    # We want one row per ['EFFECTIVEDATE', 'PAYMENTTYPE', 'SERVICE', 'VERSIONNO']
    # Tie-breaker: greatest value of ['LASTCHANGED']
    .sort(["LASTCHANGED"], descending=False)
    .unique(
        subset=["EFFECTIVEDATE", "PAYMENTTYPE", "SERVICE", "VERSIONNO"], keep="last"
    )
)

Nemosis

This table is not yet available in Nemosis.

Example File

From PUBLIC_ARCHIVE_ANCILLARY_RECOVERY_SPLIT_FILE01_202609010000.zip

EFFECTIVEDATEVERSIONNOSERVICEPAYMENTTYPECUSTOMER_PORTIONLASTCHANGEDACE_PORTION
2002/07/01 00:00:001REACTIVETESTING1002009/11/18 10:15:18
2002/07/01 00:00:001LOADSHEDTESTING1002009/11/18 10:15:18
2002/07/01 00:00:001RESTARTTESTING502009/11/18 10:15:18
2000/07/01 00:00:001AGCENABLING502003/06/03 09:46:25
2000/07/01 00:00:001FCASCOMPCOMPENSATION502003/06/03 09:46:25
2000/07/01 00:00:001GOVERNORENABLING60L502003/06/03 09:46:25
2000/07/01 00:00:001GOVERNORENABLING60R502003/06/03 09:46:25
2000/07/01 00:00:001GOVERNORENABLING6L502003/06/03 09:46:25
2000/07/01 00:00:001GOVERNORENABLING6R502003/06/03 09:46:25
2000/07/01 00:00:001LOADSHEDCOMPENSATION502003/06/03 09:46:25
2000/07/01 00:00:001LOADSHEDENABLING502003/06/03 09:46:25
...

CSETP.WORLDDVD_ANCILLARY_RECOVERY_SPLITAEMOPUBLIC2026/10/0915:24:38001791523478383MONTHLY_ARCHIVE001791523478383
ISETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT2EFFECTIVEDATEVERSIONNOSERVICEPAYMENTTYPECUSTOMER_PORTIONLASTCHANGEDACE_PORTION
DSETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT22002/07/01 00:00:001REACTIVETESTING1002009/11/18 10:15:18
DSETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT22002/07/01 00:00:001LOADSHEDTESTING1002009/11/18 10:15:18
DSETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT22002/07/01 00:00:001RESTARTTESTING502009/11/18 10:15:18
DSETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT22000/07/01 00:00:001AGCENABLING502003/06/03 09:46:25
DSETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT22000/07/01 00:00:001FCASCOMPCOMPENSATION502003/06/03 09:46:25
DSETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT22000/07/01 00:00:001GOVERNORENABLING60L502003/06/03 09:46:25
DSETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT22000/07/01 00:00:001GOVERNORENABLING60R502003/06/03 09:46:25
DSETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT22000/07/01 00:00:001GOVERNORENABLING6L502003/06/03 09:46:25
DSETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT22000/07/01 00:00:001GOVERNORENABLING6R502003/06/03 09:46:25
DSETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT22000/07/01 00:00:001LOADSHEDCOMPENSATION502003/06/03 09:46:25
DSETTLEMENT_CONFIGANCILLARY_RECOVERY_SPLIT22000/07/01 00:00:001LOADSHEDENABLING502003/06/03 09:46:25
...
CEND OF REPORT105

EFFECTIVEDATE,VERSIONNO,SERVICE,PAYMENTTYPE,CUSTOMER_PORTION,LASTCHANGED,ACE_PORTION
"2002/07/01 00:00:00",1,REACTIVE,TESTING,100,"2009/11/18 10:15:18",
"2002/07/01 00:00:00",1,LOADSHED,TESTING,100,"2009/11/18 10:15:18",
"2002/07/01 00:00:00",1,RESTART,TESTING,50,"2009/11/18 10:15:18",
"2000/07/01 00:00:00",1,AGC,ENABLING,50,"2003/06/03 09:46:25",
"2000/07/01 00:00:00",1,FCASCOMP,COMPENSATION,50,"2003/06/03 09:46:25",
"2000/07/01 00:00:00",1,GOVERNOR,ENABLING60L,50,"2003/06/03 09:46:25",
"2000/07/01 00:00:00",1,GOVERNOR,ENABLING60R,50,"2003/06/03 09:46:25",
"2000/07/01 00:00:00",1,GOVERNOR,ENABLING6L,50,"2003/06/03 09:46:25",
"2000/07/01 00:00:00",1,GOVERNOR,ENABLING6R,50,"2003/06/03 09:46:25",
"2000/07/01 00:00:00",1,LOADSHED,COMPENSATION,50,"2003/06/03 09:46:25",
"2000/07/01 00:00:00",1,LOADSHED,ENABLING,50,"2003/06/03 09:46:25",
...

C,SETP.WORLD,DVD_ANCILLARY_RECOVERY_SPLIT,AEMO,PUBLIC,2026/10/09,15:24:38,001791523478383,MONTHLY_ARCHIVE,001791523478383
I,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,EFFECTIVEDATE,VERSIONNO,SERVICE,PAYMENTTYPE,CUSTOMER_PORTION,LASTCHANGED,ACE_PORTION
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,"2002/07/01 00:00:00",1,REACTIVE,TESTING,100,"2009/11/18 10:15:18",
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,"2002/07/01 00:00:00",1,LOADSHED,TESTING,100,"2009/11/18 10:15:18",
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,"2002/07/01 00:00:00",1,RESTART,TESTING,50,"2009/11/18 10:15:18",
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,"2000/07/01 00:00:00",1,AGC,ENABLING,50,"2003/06/03 09:46:25",
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,"2000/07/01 00:00:00",1,FCASCOMP,COMPENSATION,50,"2003/06/03 09:46:25",
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,"2000/07/01 00:00:00",1,GOVERNOR,ENABLING60L,50,"2003/06/03 09:46:25",
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,"2000/07/01 00:00:00",1,GOVERNOR,ENABLING60R,50,"2003/06/03 09:46:25",
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,"2000/07/01 00:00:00",1,GOVERNOR,ENABLING6L,50,"2003/06/03 09:46:25",
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,"2000/07/01 00:00:00",1,GOVERNOR,ENABLING6R,50,"2003/06/03 09:46:25",
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,"2000/07/01 00:00:00",1,LOADSHED,COMPENSATION,50,"2003/06/03 09:46:25",
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,"2000/07/01 00:00:00",1,LOADSHED,ENABLING,50,"2003/06/03 09:46:25",
...
C,"END OF REPORT",105

Availability

Visibility: Public

This table is in the public monthly MMSDM archive.

I have collated the list of all those files into one place, in this CSV metadata file. (Columns year, month, url, compressed_size in bytes).

The earliest available data is month 1 of 2015. The most recent available data is month 9 of 2026.

Every month in between has a file. (No gaps.)

Data Size

Each year of data is approximately 13 KB when zipped, 126 KB as unzipped CSV.

Deduplication and PDR Loader Configuration

The primary keys are:

The transaction type is "INSERT-UPDATE", which means that you will likely see duplicate data with different values.

You should deduplicate by sorting based on LASTCHANGED, within each group of primary keys.

PDR Loader configuration is:

Report Name Report Subtype Version
SETTLEMENT_CONFIG ANCILLARY_RECOVERY_SPLIT 1
SETTLEMENT_CONFIG ANCILLARY_RECOVERY_SPLIT 2

This means that the CSV files start with metadata columns:

I,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,1,...
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,1,...

or

I,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,...
D,SETTLEMENT_CONFIG,ANCILLARY_RECOVERY_SPLIT,2,...

ROW_FILTER_TYPE is LASTCHANGED

Indexes

This page as JSON (schema documented here, but may change)

Download a JSON Schema specification for this table.

Official AEMO schema documentation

Other Information

Package: SETTLEMENT_CONFIG