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PREDISPATCH_MNSPBIDTRK

PREDISPATCH_MNSPBIDTRK shows the MNSP bid tracking, including the bid version used in each predispatch run for each MNSP Interconnector Link. PREDISPATCH_MNSPBIDTRK shows the audit trail of the bid used for each predispatch run.

Source

Own (confidential) data updates every predispatch run. All bids are available to all participants as part of next day market data.

Volume

1, 700, 000 per year

Column Schema

LINKID

Identifier for each of the two MNSP Interconnector Links. Each link pertains to the direction from and to.

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

  • BLNKTAS

  • BLNKVIC

This column is mandatory, and a primary key.

PERIODID

Trading Interval number

SQL Type: VARCHAR2(20) Polars Type: str

This column is mandatory, and a primary key.

Examples:

  • 2026060101
  • 2026060801

PREDISPATCHSEQNO

Predispatch run identifier

SQL Type: VARCHAR2(20) Polars Type: str

This column is mandatory, and a primary key.

Examples:

  • 2026060101
  • 2026060722

DATETIME

Period expressed as Date/Time

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

This column is not mandatory.

Example: 2026/06/01 04:30:00

LASTCHANGED

Record creation timestamp

For more information, see the dedicated documentation page.

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

This column is not mandatory.

Example: 2026/06/01 04:01:42

OFFERDATE

Time this bid was processed and loaded

SQL Type: TIMESTAMP(3) Polars Type: pl.Datetime()

This column is not mandatory.

Example: 2026/06/01 03:56:21.000

Unlike most datetime columns, this one includes a millisecond component. e.g. 2029/03/15 00:00:00.123.

PARTICIPANTID

Participant Identifier

For more information, see the dedicated documentation page.

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

This column is not mandatory.

Example: BASSLINK

SETTLEMENTDATE

Market Date from which bid is active

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

This column is not mandatory.

Example: 2026/06/01 00:00:00

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

VERSIONNO

Version No. for given offer date and settlement date used

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

This column is not mandatory.

Example: 1

New Data Timing

After a pre-dispatch run

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"

# for "TIMESTAMP" columns
# Note that Polars uses slightly different format strings for fractional seconds to `dt.strptime`
# e.g. "2029/03/15 00:00:00.123".
dt_ms_fmt = "%Y/%m/%d %H:%M:%S%.3f"

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("DATETIME", "LASTCHANGED").str.strptime(pl.Datetime, dt_s_fmt),
        pl.col("SETTLEMENTDATE").str.strptime(pl.Date, d_fmt),
        pl.col("OFFERDATE").str.strptime(pl.Datetime, dt_ms_fmt),
    )
    .cast(
        {
            "LINKID": pl.Enum(["BLNKTAS", "BLNKVIC"]),
            "PERIODID": str,
            "PREDISPATCHSEQNO": str,
            "PARTICIPANTID": pl.Categorical,
            "SETTLEMENTDATE": pl.Date(),
            "VERSIONNO": int,  # or pl.UInt16
        }
    )
    # Deduplicate
    # We want one row per ['LINKID', 'PERIODID', 'PREDISPATCHSEQNO']
    # Tie-breaker: greatest value of ['LASTCHANGED']
    .sort(["LASTCHANGED"], descending=False)
    .unique(subset=["LINKID", "PERIODID", "PREDISPATCHSEQNO"], keep="last")
)

Nemosis

This table is not yet available in Nemosis.

Example File

From PUBLIC_ARCHIVE_PREDISPATCH_MNSPBIDTRK_FILE01_202606010000.zip

PREDISPATCHSEQNOLINKIDPERIODIDPARTICIPANTIDSETTLEMENTDATEOFFERDATEVERSIONNODATETIMELASTCHANGED
2026060101BLNKTAS2026060101BASSLINK2026/06/01 00:00:002026/06/01 03:56:21.00012026/06/01 04:30:002026/06/01 04:01:42
2026060101BLNKVIC2026060101BASSLINK2026/06/01 00:00:002026/06/01 03:56:21.00012026/06/01 04:30:002026/06/01 04:01:42
2026060102BLNKTAS2026060102BASSLINK2026/06/01 00:00:002026/06/01 04:26:23.00012026/06/01 05:00:002026/06/01 04:31:53
2026060102BLNKVIC2026060102BASSLINK2026/06/01 00:00:002026/06/01 04:26:23.00012026/06/01 05:00:002026/06/01 04:31:53
2026060103BLNKTAS2026060103BASSLINK2026/06/01 00:00:002026/06/01 04:56:04.00012026/06/01 05:30:002026/06/01 05:01:59
2026060103BLNKVIC2026060103BASSLINK2026/06/01 00:00:002026/06/01 04:56:04.00012026/06/01 05:30:002026/06/01 05:01:59
2026060104BLNKTAS2026060104BASSLINK2026/06/01 00:00:002026/06/01 05:26:01.00012026/06/01 06:00:002026/06/01 05:31:55
2026060104BLNKVIC2026060104BASSLINK2026/06/01 00:00:002026/06/01 05:26:01.00012026/06/01 06:00:002026/06/01 05:31:55
2026060105BLNKTAS2026060105BASSLINK2026/06/01 00:00:002026/06/01 05:56:03.00012026/06/01 06:30:002026/06/01 06:01:46
2026060105BLNKVIC2026060105BASSLINK2026/06/01 00:00:002026/06/01 05:56:03.00012026/06/01 06:30:002026/06/01 06:01:46
2026060106BLNKTAS2026060106BASSLINK2026/06/01 00:00:002026/06/01 06:26:03.00012026/06/01 07:00:002026/06/01 06:31:31
...

CSETP.WORLDDVD_PREDISPATCH_MNSPBIDTRKAEMOPUBLIC2026/07/0819:01:37001783501297861MONTHLY_ARCHIVE001783501297861
IPREDISPATCHMNSPBIDTRK1PREDISPATCHSEQNOLINKIDPERIODIDPARTICIPANTIDSETTLEMENTDATEOFFERDATEVERSIONNODATETIMELASTCHANGED
DPREDISPATCHMNSPBIDTRK12026060101BLNKTAS2026060101BASSLINK2026/06/01 00:00:002026/06/01 03:56:21.00012026/06/01 04:30:002026/06/01 04:01:42
DPREDISPATCHMNSPBIDTRK12026060101BLNKVIC2026060101BASSLINK2026/06/01 00:00:002026/06/01 03:56:21.00012026/06/01 04:30:002026/06/01 04:01:42
DPREDISPATCHMNSPBIDTRK12026060102BLNKTAS2026060102BASSLINK2026/06/01 00:00:002026/06/01 04:26:23.00012026/06/01 05:00:002026/06/01 04:31:53
DPREDISPATCHMNSPBIDTRK12026060102BLNKVIC2026060102BASSLINK2026/06/01 00:00:002026/06/01 04:26:23.00012026/06/01 05:00:002026/06/01 04:31:53
DPREDISPATCHMNSPBIDTRK12026060103BLNKTAS2026060103BASSLINK2026/06/01 00:00:002026/06/01 04:56:04.00012026/06/01 05:30:002026/06/01 05:01:59
DPREDISPATCHMNSPBIDTRK12026060103BLNKVIC2026060103BASSLINK2026/06/01 00:00:002026/06/01 04:56:04.00012026/06/01 05:30:002026/06/01 05:01:59
DPREDISPATCHMNSPBIDTRK12026060104BLNKTAS2026060104BASSLINK2026/06/01 00:00:002026/06/01 05:26:01.00012026/06/01 06:00:002026/06/01 05:31:55
DPREDISPATCHMNSPBIDTRK12026060104BLNKVIC2026060104BASSLINK2026/06/01 00:00:002026/06/01 05:26:01.00012026/06/01 06:00:002026/06/01 05:31:55
DPREDISPATCHMNSPBIDTRK12026060105BLNKTAS2026060105BASSLINK2026/06/01 00:00:002026/06/01 05:56:03.00012026/06/01 06:30:002026/06/01 06:01:46
DPREDISPATCHMNSPBIDTRK12026060105BLNKVIC2026060105BASSLINK2026/06/01 00:00:002026/06/01 05:56:03.00012026/06/01 06:30:002026/06/01 06:01:46
DPREDISPATCHMNSPBIDTRK12026060106BLNKTAS2026060106BASSLINK2026/06/01 00:00:002026/06/01 06:26:03.00012026/06/01 07:00:002026/06/01 06:31:31
...
CEND OF REPORT1003

PREDISPATCHSEQNO,LINKID,PERIODID,PARTICIPANTID,SETTLEMENTDATE,OFFERDATE,VERSIONNO,DATETIME,LASTCHANGED
2026060101,BLNKTAS,2026060101,BASSLINK,"2026/06/01 00:00:00","2026/06/01 03:56:21.000",1,"2026/06/01 04:30:00","2026/06/01 04:01:42"
2026060101,BLNKVIC,2026060101,BASSLINK,"2026/06/01 00:00:00","2026/06/01 03:56:21.000",1,"2026/06/01 04:30:00","2026/06/01 04:01:42"
2026060102,BLNKTAS,2026060102,BASSLINK,"2026/06/01 00:00:00","2026/06/01 04:26:23.000",1,"2026/06/01 05:00:00","2026/06/01 04:31:53"
2026060102,BLNKVIC,2026060102,BASSLINK,"2026/06/01 00:00:00","2026/06/01 04:26:23.000",1,"2026/06/01 05:00:00","2026/06/01 04:31:53"
2026060103,BLNKTAS,2026060103,BASSLINK,"2026/06/01 00:00:00","2026/06/01 04:56:04.000",1,"2026/06/01 05:30:00","2026/06/01 05:01:59"
2026060103,BLNKVIC,2026060103,BASSLINK,"2026/06/01 00:00:00","2026/06/01 04:56:04.000",1,"2026/06/01 05:30:00","2026/06/01 05:01:59"
2026060104,BLNKTAS,2026060104,BASSLINK,"2026/06/01 00:00:00","2026/06/01 05:26:01.000",1,"2026/06/01 06:00:00","2026/06/01 05:31:55"
2026060104,BLNKVIC,2026060104,BASSLINK,"2026/06/01 00:00:00","2026/06/01 05:26:01.000",1,"2026/06/01 06:00:00","2026/06/01 05:31:55"
2026060105,BLNKTAS,2026060105,BASSLINK,"2026/06/01 00:00:00","2026/06/01 05:56:03.000",1,"2026/06/01 06:30:00","2026/06/01 06:01:46"
2026060105,BLNKVIC,2026060105,BASSLINK,"2026/06/01 00:00:00","2026/06/01 05:56:03.000",1,"2026/06/01 06:30:00","2026/06/01 06:01:46"
2026060106,BLNKTAS,2026060106,BASSLINK,"2026/06/01 00:00:00","2026/06/01 06:26:03.000",1,"2026/06/01 07:00:00","2026/06/01 06:31:31"
...

C,SETP.WORLD,DVD_PREDISPATCH_MNSPBIDTRK,AEMO,PUBLIC,2026/07/08,19:01:37,001783501297861,MONTHLY_ARCHIVE,001783501297861
I,PREDISPATCH,MNSPBIDTRK,1,PREDISPATCHSEQNO,LINKID,PERIODID,PARTICIPANTID,SETTLEMENTDATE,OFFERDATE,VERSIONNO,DATETIME,LASTCHANGED
D,PREDISPATCH,MNSPBIDTRK,1,2026060101,BLNKTAS,2026060101,BASSLINK,"2026/06/01 00:00:00","2026/06/01 03:56:21.000",1,"2026/06/01 04:30:00","2026/06/01 04:01:42"
D,PREDISPATCH,MNSPBIDTRK,1,2026060101,BLNKVIC,2026060101,BASSLINK,"2026/06/01 00:00:00","2026/06/01 03:56:21.000",1,"2026/06/01 04:30:00","2026/06/01 04:01:42"
D,PREDISPATCH,MNSPBIDTRK,1,2026060102,BLNKTAS,2026060102,BASSLINK,"2026/06/01 00:00:00","2026/06/01 04:26:23.000",1,"2026/06/01 05:00:00","2026/06/01 04:31:53"
D,PREDISPATCH,MNSPBIDTRK,1,2026060102,BLNKVIC,2026060102,BASSLINK,"2026/06/01 00:00:00","2026/06/01 04:26:23.000",1,"2026/06/01 05:00:00","2026/06/01 04:31:53"
D,PREDISPATCH,MNSPBIDTRK,1,2026060103,BLNKTAS,2026060103,BASSLINK,"2026/06/01 00:00:00","2026/06/01 04:56:04.000",1,"2026/06/01 05:30:00","2026/06/01 05:01:59"
D,PREDISPATCH,MNSPBIDTRK,1,2026060103,BLNKVIC,2026060103,BASSLINK,"2026/06/01 00:00:00","2026/06/01 04:56:04.000",1,"2026/06/01 05:30:00","2026/06/01 05:01:59"
D,PREDISPATCH,MNSPBIDTRK,1,2026060104,BLNKTAS,2026060104,BASSLINK,"2026/06/01 00:00:00","2026/06/01 05:26:01.000",1,"2026/06/01 06:00:00","2026/06/01 05:31:55"
D,PREDISPATCH,MNSPBIDTRK,1,2026060104,BLNKVIC,2026060104,BASSLINK,"2026/06/01 00:00:00","2026/06/01 05:26:01.000",1,"2026/06/01 06:00:00","2026/06/01 05:31:55"
D,PREDISPATCH,MNSPBIDTRK,1,2026060105,BLNKTAS,2026060105,BASSLINK,"2026/06/01 00:00:00","2026/06/01 05:56:03.000",1,"2026/06/01 06:30:00","2026/06/01 06:01:46"
D,PREDISPATCH,MNSPBIDTRK,1,2026060105,BLNKVIC,2026060105,BASSLINK,"2026/06/01 00:00:00","2026/06/01 05:56:03.000",1,"2026/06/01 06:30:00","2026/06/01 06:01:46"
D,PREDISPATCH,MNSPBIDTRK,1,2026060106,BLNKTAS,2026060106,BASSLINK,"2026/06/01 00:00:00","2026/06/01 06:26:03.000",1,"2026/06/01 07:00:00","2026/06/01 06:31:31"
...
C,"END OF REPORT",1003

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 6 of 2026.

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

Data Size

Each year of data is approximately 533 KB when zipped, 5 MB 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
PREDISPATCH MNSPBIDTRK 1

This means that the CSV files start with metadata columns:

I,PREDISPATCH,MNSPBIDTRK,1,...
D,PREDISPATCH,MNSPBIDTRK,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: PRE_DISPATCH