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EMSMASTER

EMSMASTER provides a description of the SCADA measurements that are associated with the SPD_ID points utilised in generic equation RHS terms

Column Schema

SPD_ID

ID defining data source

SQL Type: VARCHAR(21) Polars Type: str

This column is mandatory, and a primary key.

Examples:

  • AGLHAL.SHPS1
  • AGLSOM.VTTS1
  • ANGAS2.SDRN2
  • APD01.VAPD1
  • APD02.VAPD2
  • APDLOAD
  • APDLOAD_MVAR
  • ARMIDALE_CAP1_STATUS
  • ARMIDALE_SVC_ONSTATUS
  • ARTX_SUM_LOAD

SPD_TYPE

ID describing type of data source

SQL Type: VARCHAR(1) Polars Type: pl.Categorical

This column is mandatory, and a primary key.

Examples:

  • A
  • I
  • R
  • S
  • T

DESCRIPTION

The detailed description of the SCADA point associated with the SPD_ID

SQL Type: VARCHAR(255) Polars Type: str

This column is not mandatory.

Examples:

  • AGC Lower from Qld Generators
  • AGC Lower from Snowy Generators
  • AGC Lower from Tasmanian Generators
  • AGC Lower from Victorian Generators
  • AGC Raise from Qld Generators
  • AGC Raise from Victorian Generators
  • Aggregate Broken Hill Gas Turbines Unit 1 & 2 (SCADA)
  • Angas Creek - Para line ON status
  • Angaston GT unit 2
  • Availability status of Belmont #1 110kV Cap Bank

GROUPING_ID

The Grouping associated with the SPD ID - most often a RegionID

SQL Type: VARCHAR(20) Polars Type: str

This column is not mandatory.

Examples:

  • NEMMCO
  • NSW1
  • QLD1
  • SA1
  • SNOWY1
  • TAS1
  • VIC1
  • Z_ARCHIVE

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: 2006/05/25 10:11:34

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(
        {
            "SPD_ID": str,
            "SPD_TYPE": pl.Categorical,
            "DESCRIPTION": str,
            "GROUPING_ID": str,
        }
    )
    # Deduplicate
    # We want one row per ['SPD_ID', 'SPD_TYPE']
    # Tie-breaker: greatest value of ['LASTCHANGED']
    .sort(["LASTCHANGED"], descending=False)
    .unique(subset=["SPD_ID", "SPD_TYPE"], keep="last")
)

Nemosis

This table is not yet available in Nemosis.

Example File

From PUBLIC_ARCHIVE_EMSMASTER_FILE01_202609010000.zip

SPD_IDSPD_TYPEDESCRIPTIONGROUPING_IDLASTCHANGED
HOFF_X_65_060_0X1_BASnowy fully co-optimised constraint offset for CSP/CSC trialZ_ARCHIVE2008/08/21 15:40:38
HOFF_X_65_060_0X1_AASnowy fully co-optimised constraint offset for CSP/CSC trialZ_ARCHIVE2008/08/21 15:40:38
HOFF_UTYS_BASnowy fully co-optimised constraint offset for CSP/CSC trialZ_ARCHIVE2008/08/21 15:40:38
HOFF_051+64_DASnowy fully co-optimised constraint offset for CSP/CSC trialZ_ARCHIVE2008/08/21 15:40:40
HOFF_SNO_NSW_TU_ISLASnowy fully co-optimised constraint offset for CSP/CSC trialZ_ARCHIVE2008/08/21 15:40:38
TAS_NCSPS_SHGT1_FIRMSFirm flow enablement status for SHGT No.1 lineTAS12006/05/25 10:11:34
TAS_NCSPS_SHFA2_FIRMSFirm flow enablement status for SHFA No.2 lineTAS12006/05/25 10:11:34
TAS_NCSPS_SHFA1_FIRMSFirm flow enablement status for SHFA No.1 lineTAS12006/05/25 10:11:34
TAS_NCSPS_PMHA4_FIRMSFirm flow enablement status for PMHA No.4 lineTAS12006/05/25 10:11:34
TAS_NCSPS_PMHA3_FIRMSFirm flow enablement status for PMHA No.3 lineTAS12006/05/25 10:11:34
TAS_NCSPS_PMHA2_FIRMSFirm flow enablement status for PMHA No.2 lineTAS12006/05/25 10:11:34
...

CSETP.WORLDDVD_EMSMASTERAEMOPUBLIC2026/10/0915:36:35001791524195942MONTHLY_ARCHIVE001791524195942
IGENERIC_CONSTRAINTEMSMASTER1SPD_IDSPD_TYPEDESCRIPTIONGROUPING_IDLASTCHANGED
DGENERIC_CONSTRAINTEMSMASTER1HOFF_X_65_060_0X1_BASnowy fully co-optimised constraint offset for CSP/CSC trialZ_ARCHIVE2008/08/21 15:40:38
DGENERIC_CONSTRAINTEMSMASTER1HOFF_X_65_060_0X1_AASnowy fully co-optimised constraint offset for CSP/CSC trialZ_ARCHIVE2008/08/21 15:40:38
DGENERIC_CONSTRAINTEMSMASTER1HOFF_UTYS_BASnowy fully co-optimised constraint offset for CSP/CSC trialZ_ARCHIVE2008/08/21 15:40:38
DGENERIC_CONSTRAINTEMSMASTER1HOFF_051+64_DASnowy fully co-optimised constraint offset for CSP/CSC trialZ_ARCHIVE2008/08/21 15:40:40
DGENERIC_CONSTRAINTEMSMASTER1HOFF_SNO_NSW_TU_ISLASnowy fully co-optimised constraint offset for CSP/CSC trialZ_ARCHIVE2008/08/21 15:40:38
DGENERIC_CONSTRAINTEMSMASTER1TAS_NCSPS_SHGT1_FIRMSFirm flow enablement status for SHGT No.1 lineTAS12006/05/25 10:11:34
DGENERIC_CONSTRAINTEMSMASTER1TAS_NCSPS_SHFA2_FIRMSFirm flow enablement status for SHFA No.2 lineTAS12006/05/25 10:11:34
DGENERIC_CONSTRAINTEMSMASTER1TAS_NCSPS_SHFA1_FIRMSFirm flow enablement status for SHFA No.1 lineTAS12006/05/25 10:11:34
DGENERIC_CONSTRAINTEMSMASTER1TAS_NCSPS_PMHA4_FIRMSFirm flow enablement status for PMHA No.4 lineTAS12006/05/25 10:11:34
DGENERIC_CONSTRAINTEMSMASTER1TAS_NCSPS_PMHA3_FIRMSFirm flow enablement status for PMHA No.3 lineTAS12006/05/25 10:11:34
DGENERIC_CONSTRAINTEMSMASTER1TAS_NCSPS_PMHA2_FIRMSFirm flow enablement status for PMHA No.2 lineTAS12006/05/25 10:11:34
...
CEND OF REPORT1003

SPD_ID,SPD_TYPE,DESCRIPTION,GROUPING_ID,LASTCHANGED
HOFF_X_65_060_0X1_B,A,"Snowy fully co-optimised constraint offset for CSP/CSC trial",Z_ARCHIVE,"2008/08/21 15:40:38"
HOFF_X_65_060_0X1_A,A,"Snowy fully co-optimised constraint offset for CSP/CSC trial",Z_ARCHIVE,"2008/08/21 15:40:38"
HOFF_UTYS_B,A,"Snowy fully co-optimised constraint offset for CSP/CSC trial",Z_ARCHIVE,"2008/08/21 15:40:38"
HOFF_051+64_D,A,"Snowy fully co-optimised constraint offset for CSP/CSC trial",Z_ARCHIVE,"2008/08/21 15:40:40"
HOFF_SNO_NSW_TU_ISL,A,"Snowy fully co-optimised constraint offset for CSP/CSC trial",Z_ARCHIVE,"2008/08/21 15:40:38"
TAS_NCSPS_SHGT1_FIRM,S,"Firm flow enablement status for SHGT No.1 line",TAS1,"2006/05/25 10:11:34"
TAS_NCSPS_SHFA2_FIRM,S,"Firm flow enablement status for SHFA No.2 line",TAS1,"2006/05/25 10:11:34"
TAS_NCSPS_SHFA1_FIRM,S,"Firm flow enablement status for SHFA No.1 line",TAS1,"2006/05/25 10:11:34"
TAS_NCSPS_PMHA4_FIRM,S,"Firm flow enablement status for PMHA No.4 line",TAS1,"2006/05/25 10:11:34"
TAS_NCSPS_PMHA3_FIRM,S,"Firm flow enablement status for PMHA No.3 line",TAS1,"2006/05/25 10:11:34"
TAS_NCSPS_PMHA2_FIRM,S,"Firm flow enablement status for PMHA No.2 line",TAS1,"2006/05/25 10:11:34"
...

C,SETP.WORLD,DVD_EMSMASTER,AEMO,PUBLIC,2026/10/09,15:36:35,001791524195942,MONTHLY_ARCHIVE,001791524195942
I,GENERIC_CONSTRAINT,EMSMASTER,1,SPD_ID,SPD_TYPE,DESCRIPTION,GROUPING_ID,LASTCHANGED
D,GENERIC_CONSTRAINT,EMSMASTER,1,HOFF_X_65_060_0X1_B,A,"Snowy fully co-optimised constraint offset for CSP/CSC trial",Z_ARCHIVE,"2008/08/21 15:40:38"
D,GENERIC_CONSTRAINT,EMSMASTER,1,HOFF_X_65_060_0X1_A,A,"Snowy fully co-optimised constraint offset for CSP/CSC trial",Z_ARCHIVE,"2008/08/21 15:40:38"
D,GENERIC_CONSTRAINT,EMSMASTER,1,HOFF_UTYS_B,A,"Snowy fully co-optimised constraint offset for CSP/CSC trial",Z_ARCHIVE,"2008/08/21 15:40:38"
D,GENERIC_CONSTRAINT,EMSMASTER,1,HOFF_051+64_D,A,"Snowy fully co-optimised constraint offset for CSP/CSC trial",Z_ARCHIVE,"2008/08/21 15:40:40"
D,GENERIC_CONSTRAINT,EMSMASTER,1,HOFF_SNO_NSW_TU_ISL,A,"Snowy fully co-optimised constraint offset for CSP/CSC trial",Z_ARCHIVE,"2008/08/21 15:40:38"
D,GENERIC_CONSTRAINT,EMSMASTER,1,TAS_NCSPS_SHGT1_FIRM,S,"Firm flow enablement status for SHGT No.1 line",TAS1,"2006/05/25 10:11:34"
D,GENERIC_CONSTRAINT,EMSMASTER,1,TAS_NCSPS_SHFA2_FIRM,S,"Firm flow enablement status for SHFA No.2 line",TAS1,"2006/05/25 10:11:34"
D,GENERIC_CONSTRAINT,EMSMASTER,1,TAS_NCSPS_SHFA1_FIRM,S,"Firm flow enablement status for SHFA No.1 line",TAS1,"2006/05/25 10:11:34"
D,GENERIC_CONSTRAINT,EMSMASTER,1,TAS_NCSPS_PMHA4_FIRM,S,"Firm flow enablement status for PMHA No.4 line",TAS1,"2006/05/25 10:11:34"
D,GENERIC_CONSTRAINT,EMSMASTER,1,TAS_NCSPS_PMHA3_FIRM,S,"Firm flow enablement status for PMHA No.3 line",TAS1,"2006/05/25 10:11:34"
D,GENERIC_CONSTRAINT,EMSMASTER,1,TAS_NCSPS_PMHA2_FIRM,S,"Firm flow enablement status for PMHA No.2 line",TAS1,"2006/05/25 10:11:34"
...
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 9 of 2026.

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

Data Size

Each year of data is approximately 2 MB when zipped, 15 MB 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
GENERIC_CONSTRAINT EMSMASTER 1

This means that the CSV files start with metadata columns:

I,GENERIC_CONSTRAINT,EMSMASTER,1,...
D,GENERIC_CONSTRAINT,EMSMASTER,1,...

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: GENERIC_CONSTRAINT