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Wholesale Electricity Market (WEM)

The WEM supplies electricity to the south-west of Western Australia via the South West Interconnected System (SWIS). A unique feature of the WEM is the Reserve Capacity Mechanism, which ensures that there is enough generation to meet demand at all times.

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Understanding the WEM

The WEM provides electricity to more than 1.2 million businesses and households in WA.

View fact sheet

WEM data dashboard

An at-a-glance view of the WEM’s key data points, including generation, price, outages and fuel mix.

Procedures

The processes and requirements, made under the WEM Rules, that govern the operation of the WEM.

WEM Electricity Statement of Opportunities (WEM ESOO)

A 10-year forecast for peak electricity demand and operational consumption in the SWIS.

Registration

The information, forms and processes for registering as a Market Participant, or registering a Facility, in the WEM.

Market data

Data relating to the WEM, including demand and forecasts, dispatch, outages, prices, settlements, STEM, and NCESS.

Engineering Roadmaps to 100% Renewables

This is an ongoing body of work outlining the critical engineering actions required to enable Australia’s largest power systems to securely and reliably operate with higher amounts of renewables.

In this section

About the Wholesale Electricity Market (WEM)
Data (WEM)
Data, forecasts and reports relating to the operation of the WEM and the SWIS.
Participating in the market
Information, documents and processes for prospective, new and current participants in the WEM.
System operations
AEMO is responsible for ensuring that the South West Interconnected System (SWIS) is operated in a secure and reliable manner.
Procedures, policies and guides
Information, processes and procedures for the WEM.
WEM events and reports
Information about, and analysis of, the alerts that AEMO provides to WEM participants about impending or current situations and issues.
Market operations
Planning and forecasting
WA Allowable Revenue
Every three years, AEMO must submit its Allowable Revenue and Forecast Capital Expenditure proposal to the Economic Regulatory Authority for review and approval.
Reserve Capacity Mechanism
WEM - Contacts and Subscriptions (WA)

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