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CONTRACTLOADSHED

CONTRACTLOADSHED shows Governor contract details used in the settlement and dispatch of this service. Note: services are dispatched as 6 and 60 raise Frequency Control Ancillary Services (FCAS). Mandatory requirements and breakpoint details are not used for load shed. This Table may also be used for NSCAS and Type 1 transitional services procured by AEMO under the ISF framework during 2025 and prior to the implementation of all system changes. During this time descriptions in these tables may not be correct.

CONTRACTLOADSHED data is confidential to the relevant participant.

Source

CONTRACTLOADSHED updates only where there is a contract variation.

Tip

1 second, 6 second, 5 minute, 60 second and regulation refer to types of FCAS markets.

Column Schema

CONTRACTID

Contract Identifier

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

This column is mandatory, and a primary key.

VERSIONNO

Contract Version No.

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

This column is mandatory, and a primary key.

AUTHORISEDBY

User Name

SQL Type: VARCHAR2(15) Polars Type: str

This column is not mandatory.

AUTHORISEDDATE

Date Contract was Authorised

Warning

Despite what the name suggests, this is a datetime, not a date.

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

This column is not mandatory.

Example: 2026/01/20 00:05:00

DEFAULT_TESTINGPAYMENT_AMOUNT

The NMAS default payment amount

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

This column is not mandatory.

DUID

Dispatchable Unit ID

Warning

This column may contain funny characters such as / (slash) or # (hash). This may break hive-style partitioning.

For more information, see the dedicated documentation page.

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

This column is not mandatory.

Example: W/HOE#2

ENDDATE

Termination Date of Contract

Warning

Despite what the name suggests, this is a datetime, not a date.

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

This column is not mandatory.

Example: 2026/01/20 00:05:00

ILSCALINGFACTOR

SPD scaling factor for load shed vs dispatched, (1 = dispatched)

SQL Type: NUMBER(15,5) Polars Type: pl.Float64

This column is not mandatory.

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: 2026/01/20 00:05:00

LSCR

Load Shed Control Range

SQL Type: NUMBER(6,2) Polars Type: pl.Float64

This column is not mandatory.

LSEPRICE

The load shed enabling price for this contract

SQL Type: NUMBER(6,2) Polars Type: pl.Float64

This column is not mandatory.

MCPPRICE

Minimum Compensation price

SQL Type: NUMBER(12,2) Polars Type: pl.Float64

This column is not mandatory.

PARTICIPANTID

Unique participant identifier

For more information, see the dedicated documentation page.

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

This column is not mandatory.

PRICE6SECRAISECONTRACT

Contract Price for 6 Second Raise

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

This column is not mandatory.

QUANT6SECRAISECONTRACT

Contract Quantity for 6 Second Raise

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is not mandatory.

RAISE6SECMAX

Limit Equation Raise 6 Second Maximum MW

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is not mandatory.

RAISE60SECMAX

Maximum 60 second raise

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is not mandatory.

SERVICE_START_DATE

The NMAS Testing Service Start Date

Warning

Despite what the name suggests, this is a datetime, not a date.

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

This column is not mandatory.

Example: 2026/01/20 00:05:00

STARTDATE

Starting Date of Contract

Warning

Despite what the name suggests, this is a datetime, not a date.

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

This column is not mandatory.

Example: 2026/01/20 00:05:00

TENDEREDPRICE

Price Tendered for Compensation per Trading interval - Not used since 13/12/1998

SQL Type: NUMBER(6,2) Polars Type: pl.Float64

This column is not mandatory.

LOWER6SECBREAKPOINT

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

LOWER6SECMAX

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

LOWER60SECBREAKPOINT

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

LOWER60SECMAX

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

PRICE6SECLOWERCONTRACT

Not used

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

This column is unused.

PRICE6SECLOWERMANDATORY

Not used

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

This column is unused.

PRICE6SECRAISEMANDATORY

Not used

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

This column is unused.

PRICE60SECLOWERCONTRACT

Not used

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

This column is unused.

PRICE60SECLOWERMANDATORY

Not used

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

This column is unused.

PRICE60SECRAISECONTRACT

Not used

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

This column is unused.

PRICE60SECRAISEMANDATORY

Not used

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

This column is unused.

QUANT6SECLOWERCONTRACT

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

QUANT6SECLOWERMANDATORY

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

QUANT6SECRAISEMANDATORY

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

QUANT60SECLOWERCONTRACT

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

QUANT60SECLOWERMANDATORY

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

QUANT60SECRAISECONTRACT

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

QUANT60SECRAISEMANDATORY

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

RAISE6SECBREAKPOINT

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

RAISE6SECCAPACITY

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

RAISE60SECBREAKPOINT

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

RAISE60SECCAPACITY

Not used

SQL Type: NUMBER(9,6) Polars Type: pl.Float64

This column is unused.

New Data Timing

When there is a contract variation

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(
            "AUTHORISEDDATE",
            "ENDDATE",
            "LASTCHANGED",
            "SERVICE_START_DATE",
            "STARTDATE",
        ).str.strptime(pl.Datetime, dt_s_fmt),
    )
    .cast(
        {
            "CONTRACTID": pl.Categorical,
            "VERSIONNO": int,  # or pl.UInt16
            "AUTHORISEDBY": str,
            "DEFAULT_TESTINGPAYMENT_AMOUNT": pl.Float64,
            "DUID": pl.Categorical,
            "ILSCALINGFACTOR": pl.Float64,
            "LSCR": pl.Float64,
            "LSEPRICE": pl.Float64,
            "MCPPRICE": pl.Float64,
            "PARTICIPANTID": pl.Categorical,
            "PRICE6SECRAISECONTRACT": pl.Float64,
            "QUANT6SECRAISECONTRACT": pl.Float64,
            "RAISE6SECMAX": pl.Float64,
            "RAISE60SECMAX": pl.Float64,
            "TENDEREDPRICE": pl.Float64,
            "LOWER6SECBREAKPOINT": pl.Float64,
            "LOWER6SECMAX": pl.Float64,
            "LOWER60SECBREAKPOINT": pl.Float64,
            "LOWER60SECMAX": pl.Float64,
            "PRICE6SECLOWERCONTRACT": pl.Float64,
            "PRICE6SECLOWERMANDATORY": pl.Float64,
            "PRICE6SECRAISEMANDATORY": pl.Float64,
            "PRICE60SECLOWERCONTRACT": pl.Float64,
            "PRICE60SECLOWERMANDATORY": pl.Float64,
            "PRICE60SECRAISECONTRACT": pl.Float64,
            "PRICE60SECRAISEMANDATORY": pl.Float64,
            "QUANT6SECLOWERCONTRACT": pl.Float64,
            "QUANT6SECLOWERMANDATORY": pl.Float64,
            "QUANT6SECRAISEMANDATORY": pl.Float64,
            "QUANT60SECLOWERCONTRACT": pl.Float64,
            "QUANT60SECLOWERMANDATORY": pl.Float64,
            "QUANT60SECRAISECONTRACT": pl.Float64,
            "QUANT60SECRAISEMANDATORY": pl.Float64,
            "RAISE6SECBREAKPOINT": pl.Float64,
            "RAISE6SECCAPACITY": pl.Float64,
            "RAISE60SECBREAKPOINT": pl.Float64,
            "RAISE60SECCAPACITY": pl.Float64,
        }
    )
    # Drop deprecated/unused columns
    .drop(
        "LOWER6SECBREAKPOINT",
        "LOWER6SECMAX",
        "LOWER60SECBREAKPOINT",
        "LOWER60SECMAX",
        "PRICE6SECLOWERCONTRACT",
        "PRICE6SECLOWERMANDATORY",
        "PRICE6SECRAISEMANDATORY",
        "PRICE60SECLOWERCONTRACT",
        "PRICE60SECLOWERMANDATORY",
        "PRICE60SECRAISECONTRACT",
        "PRICE60SECRAISEMANDATORY",
        "QUANT6SECLOWERCONTRACT",
        "QUANT6SECLOWERMANDATORY",
        "QUANT6SECRAISEMANDATORY",
        "QUANT60SECLOWERCONTRACT",
        "QUANT60SECLOWERMANDATORY",
        "QUANT60SECRAISECONTRACT",
        "QUANT60SECRAISEMANDATORY",
        "RAISE6SECBREAKPOINT",
        "RAISE6SECCAPACITY",
        "RAISE60SECBREAKPOINT",
        "RAISE60SECCAPACITY",
    )
    # Deduplicate
    # We want one row per ['CONTRACTID', 'VERSIONNO']
    # Tie-breaker: greatest value of ['LASTCHANGED']
    .sort(["LASTCHANGED"], descending=False)
    .unique(subset=["CONTRACTID", "VERSIONNO"], keep="last")
)

Nemosis

This table is not yet available in Nemosis.

Availability

Visibility: Private

This table is not available in the public monthly MMSDM archive. Is is only available to registered market participants over FTP inside a VPN.

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
ANCILLIARY_SERVICES CONTRACTLOADSHED 1
ANCILLIARY_SERVICES CONTRACTLOADSHED 2

This means that the CSV files start with metadata columns:

I,ANCILLIARY_SERVICES,CONTRACTLOADSHED,1,...
D,ANCILLIARY_SERVICES,CONTRACTLOADSHED,1,...

or

I,ANCILLIARY_SERVICES,CONTRACTLOADSHED,2,...
D,ANCILLIARY_SERVICES,CONTRACTLOADSHED,2,...

ROW_FILTER_TYPE is LASTCHANGED

Indexes

There is more than one index.

Index 1:

Index 2:

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: ANCILLARY_SERVICES