BILLING_FCAS_REG_RESIDAMT

This report show the summary of the Billing run FCAS Regulation Residual Amounts incl default amounts

Column Schema

BILLRUNNO

The Billing RunNo

SQL Type: NUMBER(4,0) Polars Type: pl.UInt16

This column is mandatory, and a primary key.

CONSTRAINTID

The FCAS Reg Constraint Id

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

This column is mandatory, and a primary key.

CONTRACTYEAR

The Billing Contract Year

SQL Type: NUMBER(4,0) Polars Type: pl.UInt16

This column is mandatory, and a primary key.

PARTICIPANTID

The Participant Id Identifier

For more information, see the dedicated documentation page.

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

This column is mandatory, and a primary key.

REGIONID

The Region Id Identifier

For more information, see the dedicated documentation page.

The SQL type is VARCHAR2(20). This is actually a factor/enum, with values:

• QLD1

• VIC1

• TAS1

• NSW1

• SA1

• SNOWY1

This column is mandatory, and a primary key.

WEEKNO

The Billing WeekNo

Warning

There may be 53 weeks in a year, depending on how weeks align to the year start/end.

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

This column is mandatory, and a primary key.

ACE_MWH

The ACE MWh used for the Residual Calculation for the Participant

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

This column is not mandatory.

ASOE_MWH

The ASOE MWh used for the Residual Calculation of the Participant

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

This column is not mandatory.

BIDTYPE

The BidType for the Constraint Id

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

• ENERGY

• LOWERREG

• LOWER60SEC

• RAISE5MIN

• LOWER5MIN

• LOWER6SEC

• RAISE60SEC

• RAISE6SEC

• RAISEREG

• RAISE1SEC

• LOWER1SEC

This column is not mandatory.

FPP_ACE_AMOUNT

The FPP ACE Portion Amount for the Billing Week

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

This column is not mandatory.

FPP_ASOE_AMOUNT

The FPP ASOE Portion Amount for the Billing Week

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

This column is not mandatory.

FPP_RESIDUAL_AMOUNT

The FPP Residual Amount for the Billing Week

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

This column is not mandatory.

LASTCHANGED

The Lastchanged datetime of the record.

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

RESIDUAL_MWH

Sum of ACE_MWH + ASOE_MWH

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

This column is not mandatory.

UNUSED_ACE_AMOUNT

The Unused ACE Portion Amount for the Billing Week

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

This column is not mandatory.

UNUSED_ASOE_AMOUNT

The Unused ASOE Portion Amount for the Billing Week

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

This column is not mandatory.

UNUSED_RESIDUAL_AMOUNT

The Unused Residual Amount for the Billing Week

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

This column is not mandatory.

USED_ACE_AMOUNT

The Used ACE Portion Amount for the Billing Week

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

This column is not mandatory.

USED_ASOE_AMOUNT

The Used ASOE Portion Amount for the Billing Week

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

This column is not mandatory.

USED_RESIDUAL_AMOUNT

The Used Residual Amount for the Billing Week

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

This column is not mandatory.

New Data Timing

Daily Billing Run & Posting a PRELIM/FINAL and REVISE Billing 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"

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(
        {
            "BILLRUNNO": int,  # or pl.UInt16
            "CONSTRAINTID": pl.Categorical,
            "CONTRACTYEAR": int,  # or pl.UInt16
            "PARTICIPANTID": pl.Categorical,
            "REGIONID": pl.Enum(["QLD1", "VIC1", "TAS1", "NSW1", "SA1", "SNOWY1"]),
            "WEEKNO": int,  # or pl.UInt16
            "ACE_MWH": pl.Float64,
            "ASOE_MWH": pl.Float64,
            "BIDTYPE": pl.Enum(
                [
                    "ENERGY",
                    "LOWERREG",
                    "LOWER60SEC",
                    "RAISE5MIN",
                    "LOWER5MIN",
                    "LOWER6SEC",
                    "RAISE60SEC",
                    "RAISE6SEC",
                    "RAISEREG",
                    "RAISE1SEC",
                    "LOWER1SEC",
                ]
            ),
            "FPP_ACE_AMOUNT": pl.Float64,
            "FPP_ASOE_AMOUNT": pl.Float64,
            "FPP_RESIDUAL_AMOUNT": pl.Float64,
            "RESIDUAL_MWH": pl.Float64,
            "UNUSED_ACE_AMOUNT": pl.Float64,
            "UNUSED_ASOE_AMOUNT": pl.Float64,
            "UNUSED_RESIDUAL_AMOUNT": pl.Float64,
            "USED_ACE_AMOUNT": pl.Float64,
            "USED_ASOE_AMOUNT": pl.Float64,
            "USED_RESIDUAL_AMOUNT": pl.Float64,
        }
    )
    # Deduplicate
    # We want one row per ['BILLRUNNO', 'CONSTRAINTID', 'CONTRACTYEAR', 'PARTICIPANTID', 'REGIONID', 'WEEKNO']
    # Tie-breaker: greatest value of LASTCHANGED
    .sort(LASTCHANGED, descending=False)
    .unique(
        subset=[
            "BILLRUNNO",
            "CONSTRAINTID",
            "CONTRACTYEAR",
            "PARTICIPANTID",
            "REGIONID",
            "WEEKNO",
        ],
        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:

• BILLRUNNO

• CONSTRAINTID

• CONTRACTYEAR

• PARTICIPANTID

• REGIONID

• WEEKNO

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
BILLING	FCAS_REG_RESIDAMT	1

This means that the CSV files start with metadata columns:

I,BILLING,FCAS_REG_RESIDAMT,1,...
D,BILLING,FCAS_REG_RESIDAMT,1,...

Links

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: BILLING_RUN

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