Data is provided in comma delimited flat file format to enable access to a range of market data. Recent files are stored in a directory for current reports, and older files are moved into the archive reports directory.
Prices quoted in these files are exclusive of GST.
File names include date and time stamps and a unique identifier to differentiate the files:
eg. PUBLIC_DISPATCHIS_200511081245_0000000068650088.ZIP
Dispatch - filename: public_dispatchis_*.csv (approx. size 5Kb)
This file contains public 5 minute dispatch data by region. Data covers interconnector flows, constraints, regional reference price, demand, dispatchable generation, dispatchable load, and ancillary services data. This file format will be updated in line with NEM market developments. (Please see note)
Trading - filename: public_tradingis_*.csv (approx. size 2Kb)
This file contains public 30 minute dispatch data by region. Data covers interconnector flows, constraints, regional reference price, demand, dispatchable generation, dispatchable load, and ancillary services data. This file format will be updated in line with NEM market developments. (Please see note)
Predispatch - filename: public_predispatchis_*.csv (approx. size 180Kb)
This file contains 30 minute predispatch (forecast) data by region to the end of the next market day, and is updated half hourly. Data covers forecast interconnector flows, constraints, regional reference price, demand, dispatchable generation, dispatchable load, and ancillary services data. This file format will be updated in line with NEM market developments. (Please see note)
5 Minute Predispatch - filename: public_p5min_*.csv (approx. size 11Kb)
This file contains 5 minute predispatch (forecast) data by region, showing short term price and demand forecasts looking out one hour ahead. The information is updated every 5 minutes. (Please see note)
Daily Aggregated Dispatch - filename: public_daily_*.csv (approx. size 400Kb)
This file is generated daily, shortly after 0400. It contains previous day data for all dispatch and trading intervals. Data provided by generating unit includes initial MW, dispatch targets and ramp rates. By region data includes regional reference prices, demand, dispatchable load, and net interchange. (Please see note)
Non-Scheduled Generation Data - filename: public_next_day_actual_gen_*.csv (approx. size 40Kb)
The metered power outputs from most large non-scheduled generating units and generating systems are provided to AEMO in real time to assist in maintaining the security of the power system. Under Clause 3.13.4(r) of the National Electricity Rules AEMO is also required to publish such data to Registered Participants, in a daily file covering all intervals of the previous trading day.
The output values in these files are sampled from SCADA at 5-minute intervals and reported under the column headed 'MWH_READING'. Note that these figures should be read as instantaneous power in MW rather than MWh. They may be used to estimate energy production, but are not the same as the half-hourly energy metering results used to determine market settlements. (Please see note)
Historical Demand - filename: public_histdemand_*.csv (approx. size 1500Kb)
This file contains historical demand information (4 second SCADA demand average over half hour interval), by region for each trading interval for that trading day.
Short Term PASA - filename: public_stpasa_*.csv (approx. size 40Kb)
This report is published every 2 hours and provides detailed disclosure of short-term power-system supply/demand balance prospects for six days following the next trading day. The information is provided for each half-hour within the report period. (Please see note)
Medium Term PASA- filename: public_mtpasa_*.csv (approx. size 50Kb)
This file is produced weekly (on Tuesdays) and lists the medium-term supply/demand prospects for the period two years in advance. The information is provided for each day within the report period.
Each week participants must submit forecasts of availability to AEMO for the next 24 months, commencing eight days after the publication date of the Medium-Term PASA report. These forecasts form the basis of the Medium-Term PASA report that will be produced the following week. (Please see note)
Daily Prices - filename: public_prices_*.csv (approx. size 50Kb)
This file is generated daily, shortly after 0400. Data is by region and includes regional reference prices, demand, dispatchable load, net interchange and excess generation. Please note that any price adjustments are not included in this data set (please refer to Adjusted Prices). (Please see note)
Yesterday's Bids - filename: public_yestbid_*.csv (approx. size 200-450Kb)
This file is generated daily, shortly after 0400. It contains the previous day's bidding data by generating unit. It is important to note that these files are very large (files are in excess of 100,000 lines) and may not be viewable using standard desktop spreadsheet applications. (Please see note)
Settlement Residue Auction - filename: aucunits_*.csv (approx. size 2Kb)
This file provides data from Settlements Residue Auctions. Files are produced twice weekly in conjunction with the preliminary and final settlements statements (see Rules Clauses 3.15.14 and 3.15.15). Preliminary files are overwritten by finals. Data covers:
total auction units, total surplus, distributed surplus, auction fees, net payment, net payment per unit, accumulated net payment, and accumulated net payment by unit.
Market Network Service Provider Bids - filename: public_yestbidMNSP_*.csv (approx. size 250-350Kb)
This file is generated daily, shortly after 0400. It contains the previous day's bidding for price and availability for the Directlink interconnector.
Market Suspension Default Pricing Schedules - filename: PUBLIC_MKTSUSP_PRICES_<#CASE_DATE>_<#REPORT_DATETIME>_<#EVENT_QUEUE_ID>.csv (approx. size 37Kb)
#CASE_DATE = Market Date (YYYYMMDD) when the previous report was created - usually the Sunday before last
#REPORT_DATETIME = Market Date & time (YYYYMMDDhhmiss) when this report was created - usually last Sunday around 03:00hrs
#EVENT_QUEUE_ID = Unique Job ID for creating this report
This file is generated each week at around 0300hrs on Sundays and otherwise on an ad hoc basis if any manual price adjustments occur. Where there are multiple files created for the same week due to price adjustments, the file with the latest #REPORT_DATETIME takes precedence.
The data fields "EFFECTIVEDATEFROM" and "EFFECTIVEDATETO" inside each file refer to respectively the start and end date of the week that the pricing schedules within the file apply to.
Adjusted Prices - filename: public_price_revision_dispatch_*.csv (approx. size 400Kb)
This report is published when there has been a price adjustment due to an overconstrained dispatch within the NEM. The file will detail the old and new RRP for each affected dispatch and trading interval for the specified region.
Volume Weighted FCAS Prices - filename: vwa_fcas_prices_*.csv (approx. size 27Kb)
In response to a request from the Australian Financial Markets Association (AFMA), on behalf of Market Participants, AEMO has agreed to calculate and publish a system volume weighted average (VWA) half-hour price for each Frequency Control Ancillary Service (FCAS) to assist participants in managing their risks. The Volume-Weighted Average half-hour prices will be determined on a system wide basis to correlate with the exposure of participants (recovery of FCAS payments is on NEM wide basis) and published once per day for each of the half hour periods in the previous trading day.
For example, for the Regulation Lower FCAS service, the system volume weighted average price for a half hour period would be equal to the NEM wide procurement costs for Regulation Lower FCAS for a half hour period divided by the total enabled volume for the corresponding half hour period.
Legacy Dispatch - filename: public_dispatch_*_legacy.csv (approx. size 2Kb)
This file contains public 5 minute dispatch data by region. Data covers interconnector flows, constraints, regional reference price, demand, dispatchable generation, dispatchable load, and ancillary services data. Note this is a legacy file format that has been replaced by the new dispatch format. The legacy format will not be extended to include market developments and it is AEMO's intention to discontinue the production of this file format at sometime in the future. (Please see note)
Legacy Predispatch - filename: public_predispatch_*_legacy.csv (approx. size 180Kb)
This file contains 30 minute predispatch (forecast) data by region to the end of the next market day, and is updated half hourly. Data covers forecast interconnector flows, constraints, regional reference price, demand, dispatchable generation, dispatchable load, and ancillary services data. Note this is a legacy file format that has been replaced by the new predispatch format. The legacy format will not be extended to include market developments and it is AEMO's intention to discontinue the production of this file format at sometime in the future. (Please see note)
Pre-administered Dispatch Prices
This file is generated for each dispatch interval. It contains dispatch prices before applying Administered Price Cap (APC)/Administered Floor Price (AFP). The data in this file is not supported by the MMS Data Model.
Cumulative Pre-administered Prices
This file is generated for each trading interval. It contains sum of trading prices before applying Administered Price Cap (APC)/Administered Floor Price (AFP) in the previous 336 trading intervals (ie. 7 days). The data in this file is not supported by the MMS Data Model.
The National Electricity Market registration classification of the State Electricity Commission of Victoria (SECV) in relation to Anglesea Power Station unit 1 (APS) was changed on 1 October 2009 from Market Scheduled Generator to Market Non-Scheduled Generator. However, APS is not reported as a Non-Scheduled Generator as it is a condition of SECV's classification as a Non-Scheduled Generator that it complies with some of the obligations of a Scheduled Generator. APS continues to be dispatched as a Scheduled Generator in the market systems with respect to its dispatch offers, targets and generation output. Accordingly, information about APS is reported as Scheduled Generator information.
Disclaimer
This data is provided for information only and is not intended for commercial use. AEMO does not guarantee the accuracy of the data or its availability at all times.