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RESIDUE_PUBLIC_DATA

RESIDUE_PUBLIC_DATA shows the public auction results. RESIDUE_PUBLIC_DATA supports the Settlement Residue Auction, by holding the public details of the auction for a given contract. RESIDUE_PUBLIC_DATA joins to RESIDUE_CON_DATA and RESIDUE.

RESIDUE_PUBLIC_DATA excludes contracts and versions without a valid publication date (i.e. invalid bids are ignored).

The data is available to all auction participants post the associated auction date.

Source

RESIDUE_PUBLIC_DATA updates are quarterly from NEMMCO.

Volume

RESIDUE_PUBLIC_DATA shows a maximum of 120 records per year.

Column Schema

CONTRACTID

Unique id for each contract to be specified by AEMO

SQL Type: VARCHAR2(30) Polars Type: pl.Categorical

This column is mandatory, and a primary key.

Examples:

  • C2026Q4T12
  • C2027Q1T11
  • C2027Q2T10
  • C2027Q3T09
  • C2027Q4T08
  • C2028Q1T07
  • C2028Q2T06
  • C2028Q3T05
  • C2028Q4T04
  • C2029Q1T03

FROMREGIONID

Nominated source region for Interconnector

For more information, see the dedicated documentation page.

The SQL type is VARCHAR2(10). This is actually a factor/enum, with values:

  • QLD1

  • VIC1

  • TAS1

  • NSW1

  • SA1

This column is mandatory, and a primary key.

INTERCONNECTORID

Unique interconnector identifier

SQL Type: VARCHAR2(10) Polars Type: pl.Categorical

This column is mandatory, and a primary key.

Examples:

  • NSW1-QLD1
  • NSW1-SA1
  • T-V-MNSP1
  • V-SA
  • VIC1-NSW1

VERSIONNO

Version Number

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

This column is mandatory, and a primary key.

Example: 1

CLEARINGPRICE

Clearing price

SQL Type: NUMBER(17,5) Polars Type: pl.Float64

This column is not mandatory.

Examples: 748.19, 720, 21800.44, 20858

LASTCHANGED

Date and time this record was last changed

For more information, see the dedicated documentation page.

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

This column is not mandatory.

Example: 2026/09/15 14:00:12

RESERVEPRICE

Reserve price

SQL Type: NUMBER(17,5) Polars Type: pl.Float64

This column is not mandatory.

Example: 0

UNITSOFFERED

Total units offered for auction

SQL Type: NUMBER(5,0) Polars Type: pl.UInt32

This column is not mandatory.

Examples: 41, 841

UNITSSOLD

Units Sold (modified format and usage in March 2003 to support SRA Inter-Temporal Linking)

SQL Type: NUMBER(16,6) Polars Type: pl.Float64

This column is not mandatory.

Examples: 41, 800

New Data Timing

Updated quarterly

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"

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),
    )
    .cast(
        {
            "CONTRACTID": pl.Categorical,
            "FROMREGIONID": pl.Enum(["QLD1", "VIC1", "TAS1", "NSW1", "SA1"]),
            "INTERCONNECTORID": pl.Categorical,
            "VERSIONNO": int,  # or pl.UInt16
            "CLEARINGPRICE": pl.Float64,
            "RESERVEPRICE": pl.Float64,
            "UNITSOFFERED": int,  # or pl.UInt32
            "UNITSSOLD": pl.Float64,
        }
    )
    # Deduplicate
    # We want one row per ['CONTRACTID', 'FROMREGIONID', 'INTERCONNECTORID', 'VERSIONNO']
    # Tie-breaker: greatest value of ['LASTCHANGED']
    .sort(["LASTCHANGED"], descending=False)
    .unique(
        subset=["CONTRACTID", "FROMREGIONID", "INTERCONNECTORID", "VERSIONNO"],
        keep="last",
    )
)

Nemosis

This table is not yet available in Nemosis.

Example File

From PUBLIC_ARCHIVE_RESIDUE_PUBLIC_DATA_FILE01_202609010000.zip

CONTRACTIDVERSIONNOINTERCONNECTORIDFROMREGIONIDUNITSOFFEREDUNITSSOLDCLEARINGPRICERESERVEPRICELASTCHANGED
C2026Q4T121NSW1-QLD1NSW17557685002026/09/15 14:00:12
C2027Q3T091NSW1-SA1SA1200200162502026/09/15 14:00:12
C2027Q3T091NSW1-SA1NSW1200200180002026/09/15 14:00:12
C2027Q3T091NSW1-QLD1QLD113410818397.402026/09/15 14:00:12
C2027Q2T101VIC1-NSW1NSW12021671256.3502026/09/15 14:00:12
C2027Q2T101VIC1-NSW1VIC13222176800.3802026/09/15 14:00:12
C2027Q3T091NSW1-QLD1NSW166621506.0502026/09/15 14:00:12
C2027Q2T101NSW1-QLD1QLD113410819653.6902026/09/15 14:00:12
C2027Q2T101V-SAVIC11811255481.602026/09/15 14:00:12
C2027Q2T101T-V-MNSP1VIC11781255639.7302026/09/15 14:00:12
C2027Q2T101T-V-MNSP1TAS11501255081.0702026/09/15 14:00:12
...

CSETP.WORLDDVD_RESIDUE_PUBLIC_DATAAEMOPUBLIC2026/10/0916:28:08001791527288424MONTHLY_ARCHIVE001791527288424
IIRAUCTIONRESIDUE_PUBLIC_DATA1CONTRACTIDVERSIONNOINTERCONNECTORIDFROMREGIONIDUNITSOFFEREDUNITSSOLDCLEARINGPRICERESERVEPRICELASTCHANGED
DIRAUCTIONRESIDUE_PUBLIC_DATA1C2026Q4T121NSW1-QLD1NSW17557685002026/09/15 14:00:12
DIRAUCTIONRESIDUE_PUBLIC_DATA1C2027Q3T091NSW1-SA1SA1200200162502026/09/15 14:00:12
DIRAUCTIONRESIDUE_PUBLIC_DATA1C2027Q3T091NSW1-SA1NSW1200200180002026/09/15 14:00:12
DIRAUCTIONRESIDUE_PUBLIC_DATA1C2027Q3T091NSW1-QLD1QLD113410818397.402026/09/15 14:00:12
DIRAUCTIONRESIDUE_PUBLIC_DATA1C2027Q2T101VIC1-NSW1NSW12021671256.3502026/09/15 14:00:12
DIRAUCTIONRESIDUE_PUBLIC_DATA1C2027Q2T101VIC1-NSW1VIC13222176800.3802026/09/15 14:00:12
DIRAUCTIONRESIDUE_PUBLIC_DATA1C2027Q3T091NSW1-QLD1NSW166621506.0502026/09/15 14:00:12
DIRAUCTIONRESIDUE_PUBLIC_DATA1C2027Q2T101NSW1-QLD1QLD113410819653.6902026/09/15 14:00:12
DIRAUCTIONRESIDUE_PUBLIC_DATA1C2027Q2T101V-SAVIC11811255481.602026/09/15 14:00:12
DIRAUCTIONRESIDUE_PUBLIC_DATA1C2027Q2T101T-V-MNSP1VIC11781255639.7302026/09/15 14:00:12
DIRAUCTIONRESIDUE_PUBLIC_DATA1C2027Q2T101T-V-MNSP1TAS11501255081.0702026/09/15 14:00:12
...
CEND OF REPORT123

CONTRACTID,VERSIONNO,INTERCONNECTORID,FROMREGIONID,UNITSOFFERED,UNITSSOLD,CLEARINGPRICE,RESERVEPRICE,LASTCHANGED
C2026Q4T12,1,NSW1-QLD1,NSW1,75,57,6850,0,"2026/09/15 14:00:12"
C2027Q3T09,1,NSW1-SA1,SA1,200,200,1625,0,"2026/09/15 14:00:12"
C2027Q3T09,1,NSW1-SA1,NSW1,200,200,1800,0,"2026/09/15 14:00:12"
C2027Q3T09,1,NSW1-QLD1,QLD1,134,108,18397.4,0,"2026/09/15 14:00:12"
C2027Q2T10,1,VIC1-NSW1,NSW1,202,167,1256.35,0,"2026/09/15 14:00:12"
C2027Q2T10,1,VIC1-NSW1,VIC1,322,217,6800.38,0,"2026/09/15 14:00:12"
C2027Q3T09,1,NSW1-QLD1,NSW1,66,62,1506.05,0,"2026/09/15 14:00:12"
C2027Q2T10,1,NSW1-QLD1,QLD1,134,108,19653.69,0,"2026/09/15 14:00:12"
C2027Q2T10,1,V-SA,VIC1,181,125,5481.6,0,"2026/09/15 14:00:12"
C2027Q2T10,1,T-V-MNSP1,VIC1,178,125,5639.73,0,"2026/09/15 14:00:12"
C2027Q2T10,1,T-V-MNSP1,TAS1,150,125,5081.07,0,"2026/09/15 14:00:12"
...

C,SETP.WORLD,DVD_RESIDUE_PUBLIC_DATA,AEMO,PUBLIC,2026/10/09,16:28:08,001791527288424,MONTHLY_ARCHIVE,001791527288424
I,IRAUCTION,RESIDUE_PUBLIC_DATA,1,CONTRACTID,VERSIONNO,INTERCONNECTORID,FROMREGIONID,UNITSOFFERED,UNITSSOLD,CLEARINGPRICE,RESERVEPRICE,LASTCHANGED
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,C2026Q4T12,1,NSW1-QLD1,NSW1,75,57,6850,0,"2026/09/15 14:00:12"
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,C2027Q3T09,1,NSW1-SA1,SA1,200,200,1625,0,"2026/09/15 14:00:12"
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,C2027Q3T09,1,NSW1-SA1,NSW1,200,200,1800,0,"2026/09/15 14:00:12"
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,C2027Q3T09,1,NSW1-QLD1,QLD1,134,108,18397.4,0,"2026/09/15 14:00:12"
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,C2027Q2T10,1,VIC1-NSW1,NSW1,202,167,1256.35,0,"2026/09/15 14:00:12"
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,C2027Q2T10,1,VIC1-NSW1,VIC1,322,217,6800.38,0,"2026/09/15 14:00:12"
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,C2027Q3T09,1,NSW1-QLD1,NSW1,66,62,1506.05,0,"2026/09/15 14:00:12"
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,C2027Q2T10,1,NSW1-QLD1,QLD1,134,108,19653.69,0,"2026/09/15 14:00:12"
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,C2027Q2T10,1,V-SA,VIC1,181,125,5481.6,0,"2026/09/15 14:00:12"
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,C2027Q2T10,1,T-V-MNSP1,VIC1,178,125,5639.73,0,"2026/09/15 14:00:12"
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,C2027Q2T10,1,T-V-MNSP1,TAS1,150,125,5081.07,0,"2026/09/15 14:00:12"
...
C,"END OF REPORT",123

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

Warning

There are some months with no files.

Data Size

Each year of data is approximately 24 KB when zipped, 235 KB as unzipped CSV.

Deduplication and PDR Loader Configuration

The primary keys are:

The transaction type is "insert", which means that you will usually not see duplicate data. If you do, you can deduplicate based on the primary keys, without sorting first. Rows from different files with the same primary keys should have the same values.

PDR Loader configuration is:

Report Name Report Subtype Version
IRAUCTION RESIDUE_PUBLIC_DATA 1

This means that the CSV files start with metadata columns:

I,IRAUCTION,RESIDUE_PUBLIC_DATA,1,...
D,IRAUCTION,RESIDUE_PUBLIC_DATA,1,...

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: IRAUCTION