Guides and useful information
These documents will help you become familiar with the Wholesale Electricity Market (WEM).
Guidelines
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25/08/2021
WEM Settlement Statement and Invoice Technical Guide
426.51 KB -
28/12/2018
Guideline: Cleansing of generation facility MWH output data
384.23 KB -
06/06/2019
Participation Guideline for Energy Storage Systems in the WEM
315.54 KB -
20/05/2021
Guideline - PASA Methodology
286.59 KB -
23/08/2019
Ancillary Services Certification Guidelines
789.54 KB -
04/09/2019
Technical Specification Operational Data Points for Generating Plant
417.45 KB
Specifications
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01/07/2021
WEMS Report and Web Services Specification v3.14
Effective 1 August 2021
1.81 MB -
29/03/2021
WEMS Submission Specifications v6.10
Effective 14 April 2021
1.22 MB -
25/05/2021
WEMS Submission Validation v5.6
Effective 14 April 2021
1.04 MB -
21/08/2020
WEM Metering Settlement and Prudential Calculations Version 1
Effective 1 September 2019 to 21 February 2020
1.03 MB -
21/08/2020
WEM Metering Settlement and Prudential Calculations Version 2
Effective 22 February 2020
1.03 MB -
26/05/2021
WEM Metering Settlement and Prudential Calculations Version 3
Effective 1 July 2021
1.07 MB -
26/05/2021
WEM Metering Settlement and Prudential Calculations Version 3 - Text
Effective 1 July 2021
416.85 KB -
14/09/2021
WEM Metering Settlement and Prudential Calculations Version 4
Effective 1 October 2021 - Changes as a result of Wholesale Electricity Market Amendments - Reserve Capacity Pricing Reforms
1.05 MB -
14/09/2021
WEM Metering Settlement and Prudential Calculations Version 4 - Text
Effective 1 October 2021 - Changes as a result of Wholesale Electricity Market Amendments - Reserve Capacity Pricing Reforms
409.78 KB -
15/09/2021
WEM Metering Settlement and Prudential Calculations Version 4.1
Effective 1 October 2021
1.06 MB -
15/09/2021
WEM Metering Settlement and Prudential Calculations Version 4.1 - Text
Effective 1 October 2021
407.12 KB
WEM and GBB (WA) participant support guide
Operational contingencies
File exchange csv templates
The following templates are provided to help Market Participants make submissions in the Wholesale Electricity Market System (WEMS) Market Participant Interface (MPI):
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06/07/2016
bilateral
159 B -
06/07/2016
resources_participant_details
178 B -
06/07/2016
resources_facility_details
94 B -
06/07/2016
stem_demand_portfolio_curve
50 B -
06/07/2016
resources_synchronisation
30 B -
06/07/2016
stem_ancillary_service
75 B -
06/07/2016
stem_facility_detail
102 B -
06/07/2016
stem_supply_portfolio_curve
125 B -
06/07/2016
balancingvariation
149 B -
06/07/2016
loadfollowingvariation
99 B -
06/07/2016
balancingstanding
159 B -
06/07/2016
loadfollowingstanding
109 B