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APEVENT

APEVENT is the driving data defining the existence and timeframes of an administered pricing event.

Column Schema

APEVENTID

Unique identifier for this administered pricing event

SQL Type: NUMBER(22,0) Polars Type: pl.Int128

This column is mandatory, and a primary key.

Examples: 41, 210

EFFECTIVEFROMINTERVAL

Date Time of the first Dispatch Interval to which the administered event applies

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

This column is not mandatory.

Example: 2008/03/17 17:05:00

EFFECTIVETOINTERVAL

Date Time of the final Dispatch Interval to which the administered event applies

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

This column is not mandatory.

Example: 2008/03/18 04:00:00

ENDAUTHORISEDBY

Authorising staff for end of AP event

SQL Type: VARCHAR2(15) Polars Type: str

This column is not mandatory.

Examples:

  • ALANH
  • ApcManager
  • BFLEMING
  • BRIGONI
  • BWEBB
  • CBROWNLEE
  • IGNAZIOR
  • PRYAN
  • PSANDERS
  • RMOGG

ENDAUTHORISEDDATE

Date Time end 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: 2008/03/17 17:00:00

LASTCHANGED

Date-Time the record was last modified

For more information, see the dedicated documentation page.

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

This column is not mandatory.

Example: 2008/03/17 16:57:03

REASON

Description of the driver for the Event

SQL Type: VARCHAR2(2000) Polars Type: str

This column is not mandatory.

Examples:

  • AEMO has determined that the rolling sum of the uncapped dispatch prices for the SA region over the previous 336 trading intervals has exceeded the cumulative price threshold (CPT) of $216,900.00.
  • AEMO has determined that the rolling sum of the uncapped dispatch prices for the VIC region over the previous 336 trading intervals has exceeded the cumulative price threshold (CPT) of $216,900.00.
  • AEMO has determined that the rolling sum of the uncapped market ancillary Lower 1 Sec services prices for the SA1 region over the previous 2016 trading intervals has exceeded the cumulative price threshold (CPT) of $1,823,600.00.
  • AEMO has determined that the rolling sum of the uncapped market ancillary Lower 6 Sec, Raise 6 Sec services(s) prices for the SA region over the previous 2016 dispatch intervals has exceeded 6 times the cumulative price threshold (CPT) of $221,100.00.
  • AEMO has determined that the rolling sum of the uncapped market ancillary Lower 60 Sec, Lower 6 Sec, Raise 6 Sec services(s) prices for the SA region over the previous 2016 dispatch intervals has exceeded 6 times the cumulative price threshold (CPT) of $221,100.00.
  • AEMO has determined that the rolling sum of the uncapped market ancillary Lower 60 Sec, Lower Reg, Raise Reg services prices for the SA1 region over the previous 2016 trading intervals has exceeded the cumulative price threshold (CPT) of $1,398,100.00.
  • AEMO has determined that the rolling sum of the uncapped market ancillary Lower 60 Sec, Raise 60 Sec, Lower Reg, Raise Reg services prices for the SA1 region over the previous 2016 trading intervals has exceeded the cumulative price threshold (CPT) of $1,398,100.00.
  • AEMO has determined that the rolling sum of the uncapped market ancillary Lower 60 Sec, Raise Reg services prices for the SA1 region over the previous 2016 trading intervals has exceeded the cumulative price threshold (CPT) of $1,398,100.00.
  • AEMO has determined that the rolling sum of the uncapped market ancillary Lower Reg services prices for the SA1 region over the previous 2016 trading intervals has exceeded the cumulative price threshold (CPT) of $1,398,100.00.
  • AEMO has determined that the rolling sum of the uncapped market ancillary Lower Reg services(s) prices for the SA region over the previous 2016 dispatch intervals has exceeded 6 times the cumulative price threshold (CPT) of $207,000.00.

STARTAUTHORISEDBY

Authorising staff for start of AP event

SQL Type: VARCHAR2(15) Polars Type: str

This column is not mandatory.

Examples:

  • ALANH
  • ApcManager
  • BFLEMING
  • BRIGONI
  • BWEBB
  • CBROWNLEE
  • IGNAZIOR
  • PRYAN
  • PSANDERS
  • RMOGG

STARTAUTHORISEDDATE

Date-Time start 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: 2008/03/17 17:00:00

New Data Timing

Administered pricing event

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(
            "EFFECTIVEFROMINTERVAL",
            "EFFECTIVETOINTERVAL",
            "ENDAUTHORISEDDATE",
            "LASTCHANGED",
            "STARTAUTHORISEDDATE",
        ).str.strptime(pl.Datetime, dt_s_fmt),
    )
    .cast(
        {
            "APEVENTID": int,  # or pl.Int128
            "ENDAUTHORISEDBY": str,
            "REASON": str,
            "STARTAUTHORISEDBY": str,
        }
    )
    # Deduplicate
    # We want one row per ['APEVENTID']
    # Tie-breaker: greatest value of ['LASTCHANGED']
    .sort(["LASTCHANGED"], descending=False)
    .unique(subset=["APEVENTID"], keep="last")
)

Nemosis

This table is not yet available in Nemosis.

Example File

From PUBLIC_ARCHIVE_APEVENT_FILE01_202609010000.zip

APEVENTIDEFFECTIVEFROMINTERVALEFFECTIVETOINTERVALREASONSTARTAUTHORISEDBYSTARTAUTHORISEDDATEENDAUTHORISEDBYENDAUTHORISEDDATELASTCHANGED
412008/03/17 17:05:002008/03/18 04:00:00CPT exceededBRIGONI2008/03/17 17:00:00BRIGONI2008/03/17 17:00:002008/03/17 16:57:03
422008/03/18 04:05:002008/03/19 04:00:00Continuation APP In accordance with NER Cl 3.14.2 (c) (1).NEMMCO has applied the APC for the next business day / trading day. Tuesday, 18 March 2008.CBROWNLEE2008/03/18 04:00:00CBROWNLEE2008/03/18 04:00:002008/03/18 03:56:28
432009/01/29 15:05:002009/01/30 04:00:00CPT exceeded BWEBB2009/01/29 15:00:00BWEBB2009/01/29 15:00:002009/01/29 14:55:57
442009/01/29 17:05:002009/01/30 04:00:00CPT exceeded in VicBWEBB2009/01/29 17:00:00BWEBB2009/01/29 17:00:002009/01/29 16:55:59
452009/01/30 04:05:002009/01/31 04:00:00extending APC to next trading dayBRIGONI2009/01/30 04:00:00BRIGONI2009/01/30 04:00:002009/01/30 03:55:34
462009/01/31 04:05:002009/02/01 04:00:00extending APC to next trading dayPRYAN2009/01/31 04:00:00PRYAN2009/01/31 04:00:002009/01/31 03:56:40
472009/02/01 04:05:002009/02/02 04:00:00extending APC to next trading dayPRYAN2009/02/01 02:25:00PRYAN2009/02/01 02:25:002009/02/01 02:22:23
482009/02/02 04:05:002009/02/03 04:00:00extending APC to next trading dayBFLEMING2009/02/02 02:30:00BFLEMING2009/02/02 02:30:002009/02/02 02:25:23
492009/02/03 04:05:002009/02/04 04:00:00extending APC to next trading dayBFLEMING2009/02/03 02:35:00BFLEMING2009/02/03 02:35:002009/02/03 02:31:03
502009/02/04 04:05:002009/02/05 04:00:00extending APC to next trading dayALANH2009/02/04 02:45:00ALANH2009/02/04 02:45:002009/02/04 02:39:58
512009/02/05 04:05:002009/02/06 04:00:00extending APC to next trading dayALANH2009/02/05 02:45:00ALANH2009/02/05 02:45:002009/02/05 02:41:55
...

CSETP.WORLDDVD_APEVENTAEMOPUBLIC2026/10/0915:24:37001791523477662MONTHLY_ARCHIVE001791523477662
IAPAPEVENT1APEVENTIDEFFECTIVEFROMINTERVALEFFECTIVETOINTERVALREASONSTARTAUTHORISEDBYSTARTAUTHORISEDDATEENDAUTHORISEDBYENDAUTHORISEDDATELASTCHANGED
DAPAPEVENT1412008/03/17 17:05:002008/03/18 04:00:00CPT exceededBRIGONI2008/03/17 17:00:00BRIGONI2008/03/17 17:00:002008/03/17 16:57:03
DAPAPEVENT1422008/03/18 04:05:002008/03/19 04:00:00Continuation APP In accordance with NER Cl 3.14.2 (c) (1).NEMMCO has applied the APC for the next business day / trading day. Tuesday, 18 March 2008.CBROWNLEE2008/03/18 04:00:00CBROWNLEE2008/03/18 04:00:002008/03/18 03:56:28
DAPAPEVENT1432009/01/29 15:05:002009/01/30 04:00:00CPT exceeded BWEBB2009/01/29 15:00:00BWEBB2009/01/29 15:00:002009/01/29 14:55:57
DAPAPEVENT1442009/01/29 17:05:002009/01/30 04:00:00CPT exceeded in VicBWEBB2009/01/29 17:00:00BWEBB2009/01/29 17:00:002009/01/29 16:55:59
DAPAPEVENT1452009/01/30 04:05:002009/01/31 04:00:00extending APC to next trading dayBRIGONI2009/01/30 04:00:00BRIGONI2009/01/30 04:00:002009/01/30 03:55:34
DAPAPEVENT1462009/01/31 04:05:002009/02/01 04:00:00extending APC to next trading dayPRYAN2009/01/31 04:00:00PRYAN2009/01/31 04:00:002009/01/31 03:56:40
DAPAPEVENT1472009/02/01 04:05:002009/02/02 04:00:00extending APC to next trading dayPRYAN2009/02/01 02:25:00PRYAN2009/02/01 02:25:002009/02/01 02:22:23
DAPAPEVENT1482009/02/02 04:05:002009/02/03 04:00:00extending APC to next trading dayBFLEMING2009/02/02 02:30:00BFLEMING2009/02/02 02:30:002009/02/02 02:25:23
DAPAPEVENT1492009/02/03 04:05:002009/02/04 04:00:00extending APC to next trading dayBFLEMING2009/02/03 02:35:00BFLEMING2009/02/03 02:35:002009/02/03 02:31:03
DAPAPEVENT1502009/02/04 04:05:002009/02/05 04:00:00extending APC to next trading dayALANH2009/02/04 02:45:00ALANH2009/02/04 02:45:002009/02/04 02:39:58
DAPAPEVENT1512009/02/05 04:05:002009/02/06 04:00:00extending APC to next trading dayALANH2009/02/05 02:45:00ALANH2009/02/05 02:45:002009/02/05 02:41:55
...
CEND OF REPORT173

APEVENTID,EFFECTIVEFROMINTERVAL,EFFECTIVETOINTERVAL,REASON,STARTAUTHORISEDBY,STARTAUTHORISEDDATE,ENDAUTHORISEDBY,ENDAUTHORISEDDATE,LASTCHANGED
41,"2008/03/17 17:05:00","2008/03/18 04:00:00","CPT exceeded",BRIGONI,"2008/03/17 17:00:00",BRIGONI,"2008/03/17 17:00:00","2008/03/17 16:57:03"
42,"2008/03/18 04:05:00","2008/03/19 04:00:00","Continuation APP In accordance with NER Cl 3.14.2 (c) (1).NEMMCO has applied the APC for the next business day / trading day. Tuesday, 18 March 2008.",CBROWNLEE,"2008/03/18 04:00:00",CBROWNLEE,"2008/03/18 04:00:00","2008/03/18 03:56:28"
43,"2009/01/29 15:05:00","2009/01/30 04:00:00","CPT exceeded ",BWEBB,"2009/01/29 15:00:00",BWEBB,"2009/01/29 15:00:00","2009/01/29 14:55:57"
44,"2009/01/29 17:05:00","2009/01/30 04:00:00","CPT exceeded in Vic",BWEBB,"2009/01/29 17:00:00",BWEBB,"2009/01/29 17:00:00","2009/01/29 16:55:59"
45,"2009/01/30 04:05:00","2009/01/31 04:00:00","extending APC to next trading day",BRIGONI,"2009/01/30 04:00:00",BRIGONI,"2009/01/30 04:00:00","2009/01/30 03:55:34"
46,"2009/01/31 04:05:00","2009/02/01 04:00:00","extending APC to next trading day",PRYAN,"2009/01/31 04:00:00",PRYAN,"2009/01/31 04:00:00","2009/01/31 03:56:40"
47,"2009/02/01 04:05:00","2009/02/02 04:00:00","extending APC to next trading day",PRYAN,"2009/02/01 02:25:00",PRYAN,"2009/02/01 02:25:00","2009/02/01 02:22:23"
48,"2009/02/02 04:05:00","2009/02/03 04:00:00","extending APC to next trading day",BFLEMING,"2009/02/02 02:30:00",BFLEMING,"2009/02/02 02:30:00","2009/02/02 02:25:23"
49,"2009/02/03 04:05:00","2009/02/04 04:00:00","extending APC to next trading day",BFLEMING,"2009/02/03 02:35:00",BFLEMING,"2009/02/03 02:35:00","2009/02/03 02:31:03"
50,"2009/02/04 04:05:00","2009/02/05 04:00:00","extending APC to next trading day",ALANH,"2009/02/04 02:45:00",ALANH,"2009/02/04 02:45:00","2009/02/04 02:39:58"
51,"2009/02/05 04:05:00","2009/02/06 04:00:00","extending APC to next trading day",ALANH,"2009/02/05 02:45:00",ALANH,"2009/02/05 02:45:00","2009/02/05 02:41:55"
...

C,SETP.WORLD,DVD_APEVENT,AEMO,PUBLIC,2026/10/09,15:24:37,001791523477662,MONTHLY_ARCHIVE,001791523477662
I,AP,APEVENT,1,APEVENTID,EFFECTIVEFROMINTERVAL,EFFECTIVETOINTERVAL,REASON,STARTAUTHORISEDBY,STARTAUTHORISEDDATE,ENDAUTHORISEDBY,ENDAUTHORISEDDATE,LASTCHANGED
D,AP,APEVENT,1,41,"2008/03/17 17:05:00","2008/03/18 04:00:00","CPT exceeded",BRIGONI,"2008/03/17 17:00:00",BRIGONI,"2008/03/17 17:00:00","2008/03/17 16:57:03"
D,AP,APEVENT,1,42,"2008/03/18 04:05:00","2008/03/19 04:00:00","Continuation APP In accordance with NER Cl 3.14.2 (c) (1).NEMMCO has applied the APC for the next business day / trading day. Tuesday, 18 March 2008.",CBROWNLEE,"2008/03/18 04:00:00",CBROWNLEE,"2008/03/18 04:00:00","2008/03/18 03:56:28"
D,AP,APEVENT,1,43,"2009/01/29 15:05:00","2009/01/30 04:00:00","CPT exceeded ",BWEBB,"2009/01/29 15:00:00",BWEBB,"2009/01/29 15:00:00","2009/01/29 14:55:57"
D,AP,APEVENT,1,44,"2009/01/29 17:05:00","2009/01/30 04:00:00","CPT exceeded in Vic",BWEBB,"2009/01/29 17:00:00",BWEBB,"2009/01/29 17:00:00","2009/01/29 16:55:59"
D,AP,APEVENT,1,45,"2009/01/30 04:05:00","2009/01/31 04:00:00","extending APC to next trading day",BRIGONI,"2009/01/30 04:00:00",BRIGONI,"2009/01/30 04:00:00","2009/01/30 03:55:34"
D,AP,APEVENT,1,46,"2009/01/31 04:05:00","2009/02/01 04:00:00","extending APC to next trading day",PRYAN,"2009/01/31 04:00:00",PRYAN,"2009/01/31 04:00:00","2009/01/31 03:56:40"
D,AP,APEVENT,1,47,"2009/02/01 04:05:00","2009/02/02 04:00:00","extending APC to next trading day",PRYAN,"2009/02/01 02:25:00",PRYAN,"2009/02/01 02:25:00","2009/02/01 02:22:23"
D,AP,APEVENT,1,48,"2009/02/02 04:05:00","2009/02/03 04:00:00","extending APC to next trading day",BFLEMING,"2009/02/02 02:30:00",BFLEMING,"2009/02/02 02:30:00","2009/02/02 02:25:23"
D,AP,APEVENT,1,49,"2009/02/03 04:05:00","2009/02/04 04:00:00","extending APC to next trading day",BFLEMING,"2009/02/03 02:35:00",BFLEMING,"2009/02/03 02:35:00","2009/02/03 02:31:03"
D,AP,APEVENT,1,50,"2009/02/04 04:05:00","2009/02/05 04:00:00","extending APC to next trading day",ALANH,"2009/02/04 02:45:00",ALANH,"2009/02/04 02:45:00","2009/02/04 02:39:58"
D,AP,APEVENT,1,51,"2009/02/05 04:05:00","2009/02/06 04:00:00","extending APC to next trading day",ALANH,"2009/02/05 02:45:00",ALANH,"2009/02/05 02:45:00","2009/02/05 02:41:55"
...
C,"END OF REPORT",173

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 10 of 2015. The most recent available data is month 9 of 2026.

Warning

There are some months with no files.

Data Size

Each year of data is approximately 54 KB when zipped, 537 KB 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
AP APEVENT 1

This means that the CSV files start with metadata columns:

I,AP,APEVENT,1,...
D,AP,APEVENT,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: FORCE_MAJEURE