Skip to content

METERDATA_INTERCONNECTOR

Publishes metering data associated with wholesale interconnectors for a given CASE_ID

Column Schema

CASE_ID

Case Identifier

SQL Type: NUMBER(15,0) Polars Type: pl.Int64

This column is mandatory, and a primary key.

Examples: 11804, 11829

INTERCONNECTORID

Interconnector Identifier

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

This column is mandatory, and a primary key.

Examples:

  • N-Q-MNSP1
  • NSW1-QLD1
  • T-V-MNSP1
  • V-S-MNSP1
  • V-SA
  • VIC1-NSW1

PERIODID

Trading Interval.

SQL Type: NUMBER(3,0) Polars Type: pl.Int16

This column is mandatory, and a primary key.

Examples: 1, 288

SETTLEMENTDATE

Settlement date within the case

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

This column is mandatory, and a primary key.

Example: 2026/02/15 00:00:00

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

EXPORTVALUE

The export direction value for the meter read (MWh)

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

This column is not mandatory.

Examples: 0.0000157, 0, 104.758031

IMPORTVALUE

The import direction value for the meter read (MWh)

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

This column is not mandatory.

Examples: 0.0001707, 0, 102.3317617

LASTCHANGED

Last changed date for the record

For more information, see the dedicated documentation page.

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

This column is not mandatory.

Example: 2026/09/05 01:02:43

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("SETTLEMENTDATE").str.strptime(pl.Date, d_fmt),
    )
    .cast(
        {
            "CASE_ID": int,  # or pl.Int64
            "INTERCONNECTORID": pl.Categorical,
            "PERIODID": int,  # or pl.Int16
            "SETTLEMENTDATE": pl.Date(),
            "EXPORTVALUE": pl.Float64,
            "IMPORTVALUE": pl.Float64,
        }
    )
    # Deduplicate
    # We want one row per ['CASE_ID', 'INTERCONNECTORID', 'PERIODID', 'SETTLEMENTDATE']
    # Tie-breaker: greatest value of ['CASE_ID', 'SETTLEMENTDATE', 'INTERCONNECTORID', 'PERIODID']
    .sort(
        ["CASE_ID", "SETTLEMENTDATE", "INTERCONNECTORID", "PERIODID"], descending=False
    )
    .unique(
        subset=["CASE_ID", "INTERCONNECTORID", "PERIODID", "SETTLEMENTDATE"],
        keep="last",
    )
)

Nemosis

This table is not yet available in Nemosis.

Example File

From PUBLIC_ARCHIVE_METERDATA_INTERCONNECTOR_FILE01_202609010000.zip

CASE_IDSETTLEMENTDATEINTERCONNECTORIDPERIODIDIMPORTVALUEEXPORTVALUELASTCHANGED
118292026/08/24 00:00:00NSW1-QLD112713.897082502026/09/15 00:33:50
118292026/08/24 00:00:00NSW1-QLD11395.38477930.00912182026/09/15 00:33:50
118292026/08/25 00:00:00NSW1-QLD116886.938425802026/09/15 00:35:24
118292026/08/24 00:00:00N-Q-MNSP11340.0031570.16796082026/09/15 00:33:50
118292026/08/24 00:00:00N-Q-MNSP11710.825228502026/09/15 00:33:50
118292026/08/24 00:00:00N-Q-MNSP12203.578600302026/09/15 00:33:50
118292026/08/26 00:00:00N-Q-MNSP12102.931695602026/09/15 00:36:54
118292026/08/29 00:00:00N-Q-MNSP1462.806993302026/09/15 00:41:24
118292026/08/23 00:00:00NSW1-QLD114369.132269502026/09/15 00:32:20
118292026/08/25 00:00:00V-S-MNSP1266002026/09/15 00:35:24
118292026/08/27 00:00:00V-S-MNSP12190.0001840.0000232026/09/15 00:38:23
...

CSETP.WORLDDVD_METERDATA_INTERCONNECTORAEMOPUBLIC2026/10/0915:53:42001791525222334MONTHLY_ARCHIVE001791525222334
IMETERDATAINTERCONNECTOR1CASE_IDSETTLEMENTDATEINTERCONNECTORIDPERIODIDIMPORTVALUEEXPORTVALUELASTCHANGED
DMETERDATAINTERCONNECTOR1118292026/08/24 00:00:00NSW1-QLD112713.897082502026/09/15 00:33:50
DMETERDATAINTERCONNECTOR1118292026/08/24 00:00:00NSW1-QLD11395.38477930.00912182026/09/15 00:33:50
DMETERDATAINTERCONNECTOR1118292026/08/25 00:00:00NSW1-QLD116886.938425802026/09/15 00:35:24
DMETERDATAINTERCONNECTOR1118292026/08/24 00:00:00N-Q-MNSP11340.0031570.16796082026/09/15 00:33:50
DMETERDATAINTERCONNECTOR1118292026/08/24 00:00:00N-Q-MNSP11710.825228502026/09/15 00:33:50
DMETERDATAINTERCONNECTOR1118292026/08/24 00:00:00N-Q-MNSP12203.578600302026/09/15 00:33:50
DMETERDATAINTERCONNECTOR1118292026/08/26 00:00:00N-Q-MNSP12102.931695602026/09/15 00:36:54
DMETERDATAINTERCONNECTOR1118292026/08/29 00:00:00N-Q-MNSP1462.806993302026/09/15 00:41:24
DMETERDATAINTERCONNECTOR1118292026/08/23 00:00:00NSW1-QLD114369.132269502026/09/15 00:32:20
DMETERDATAINTERCONNECTOR1118292026/08/25 00:00:00V-S-MNSP1266002026/09/15 00:35:24
DMETERDATAINTERCONNECTOR1118292026/08/27 00:00:00V-S-MNSP12190.0001840.0000232026/09/15 00:38:23
...
CEND OF REPORT1003

CASE_ID,SETTLEMENTDATE,INTERCONNECTORID,PERIODID,IMPORTVALUE,EXPORTVALUE,LASTCHANGED
11829,"2026/08/24 00:00:00",NSW1-QLD1,127,13.8970825,0,"2026/09/15 00:33:50"
11829,"2026/08/24 00:00:00",NSW1-QLD1,139,5.3847793,0.0091218,"2026/09/15 00:33:50"
11829,"2026/08/25 00:00:00",NSW1-QLD1,168,86.9384258,0,"2026/09/15 00:35:24"
11829,"2026/08/24 00:00:00",N-Q-MNSP1,134,0.003157,0.1679608,"2026/09/15 00:33:50"
11829,"2026/08/24 00:00:00",N-Q-MNSP1,171,0.8252285,0,"2026/09/15 00:33:50"
11829,"2026/08/24 00:00:00",N-Q-MNSP1,220,3.5786003,0,"2026/09/15 00:33:50"
11829,"2026/08/26 00:00:00",N-Q-MNSP1,210,2.9316956,0,"2026/09/15 00:36:54"
11829,"2026/08/29 00:00:00",N-Q-MNSP1,46,2.8069933,0,"2026/09/15 00:41:24"
11829,"2026/08/23 00:00:00",NSW1-QLD1,143,69.1322695,0,"2026/09/15 00:32:20"
11829,"2026/08/25 00:00:00",V-S-MNSP1,266,0,0,"2026/09/15 00:35:24"
11829,"2026/08/27 00:00:00",V-S-MNSP1,219,0.000184,0.000023,"2026/09/15 00:38:23"
...

C,SETP.WORLD,DVD_METERDATA_INTERCONNECTOR,AEMO,PUBLIC,2026/10/09,15:53:42,001791525222334,MONTHLY_ARCHIVE,001791525222334
I,METERDATA,INTERCONNECTOR,1,CASE_ID,SETTLEMENTDATE,INTERCONNECTORID,PERIODID,IMPORTVALUE,EXPORTVALUE,LASTCHANGED
D,METERDATA,INTERCONNECTOR,1,11829,"2026/08/24 00:00:00",NSW1-QLD1,127,13.8970825,0,"2026/09/15 00:33:50"
D,METERDATA,INTERCONNECTOR,1,11829,"2026/08/24 00:00:00",NSW1-QLD1,139,5.3847793,0.0091218,"2026/09/15 00:33:50"
D,METERDATA,INTERCONNECTOR,1,11829,"2026/08/25 00:00:00",NSW1-QLD1,168,86.9384258,0,"2026/09/15 00:35:24"
D,METERDATA,INTERCONNECTOR,1,11829,"2026/08/24 00:00:00",N-Q-MNSP1,134,0.003157,0.1679608,"2026/09/15 00:33:50"
D,METERDATA,INTERCONNECTOR,1,11829,"2026/08/24 00:00:00",N-Q-MNSP1,171,0.8252285,0,"2026/09/15 00:33:50"
D,METERDATA,INTERCONNECTOR,1,11829,"2026/08/24 00:00:00",N-Q-MNSP1,220,3.5786003,0,"2026/09/15 00:33:50"
D,METERDATA,INTERCONNECTOR,1,11829,"2026/08/26 00:00:00",N-Q-MNSP1,210,2.9316956,0,"2026/09/15 00:36:54"
D,METERDATA,INTERCONNECTOR,1,11829,"2026/08/29 00:00:00",N-Q-MNSP1,46,2.8069933,0,"2026/09/15 00:41:24"
D,METERDATA,INTERCONNECTOR,1,11829,"2026/08/23 00:00:00",NSW1-QLD1,143,69.1322695,0,"2026/09/15 00:32:20"
D,METERDATA,INTERCONNECTOR,1,11829,"2026/08/25 00:00:00",V-S-MNSP1,266,0,0,"2026/09/15 00:35:24"
D,METERDATA,INTERCONNECTOR,1,11829,"2026/08/27 00:00:00",V-S-MNSP1,219,0.000184,0.000023,"2026/09/15 00:38:23"
...
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 8 of 2024. 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 42 MB when zipped, 416 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
METERDATA INTERCONNECTOR 1

This means that the CSV files start with metadata columns:

I,METERDATA,INTERCONNECTOR,1,...
D,METERDATA,INTERCONNECTOR,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: METER_DATA