The Wholesale Electricity Market and Market Information Management
The Wholesale Electricity Market (WEM) was established in 2006 and is operated by the Australian Energy Market Operator (AEMO) for the South West Interconnected System (SWIS).
The WEM enables the supply and trade of wholesale electricity between retailers and generators across the SWIS and is governed by the WEM Rules.
These rules guide how the SWIS and its electricity market operate, and covers matters like wholesale electricity sale and purchase, Reserve Capacity, and Essential System Services.
The objectives of the market are:
- to promote the economically efficient, safe and reliable production and supply of electricity and electricity related services in the South West Interconnected System;
- to encourage competition among generators and retailers in the South West Interconnected System, including by facilitating efficient entry of new competitors;
- to avoid discrimination in that market against particular energy options and technologies, including sustainable energy options and technologies such as those that make use of renewable resources or that reduce overall greenhouse gas emissions;
- to minimise the long-term cost of electricity supplied to customers from the South West interconnected system; and
- to encourage the taking of measures to manage the amount of electricity used and when it is used.
Market information
'Market Information' is defined as, information that is required to be produced, exchanged or disclosed under the WEM Rules.
The following Market Information has been published by Western Power in its capacity as the Network Operator for the SWIS in accordance with the WEM Rules and WEM Procedures:
WEM Procedures
- WEM Procedure: Developing Limit Advice
- WEM Procedure: Determining Loss
- WEM Procedure: Generator Performance Standards for Existing Transmission Connected Generating Systems
- WEM Procedure: Generation System Model Submission and Maintenance
WEM Guidelines
- Generator Performance Standards: Guideline for the Assessment of Technical Requirements
- Generator Performance Standards: Relevant Generator Modification Guideline
Other market information
Metering Data
Details on how we manage metering data under the Electricity Industry (Metering) Code 2012.
We can also provide metering data to third parties if the end-use customer gives consent.
Requesting other market information
If you need Market Information not listed here, and for which we are the Information Manager, simply fill out the Market Information Request Form below and we'll get back to you promptly to discuss availability and disclosure details.
Please note:
- Western Power is only permitted to disclose Market Information in accordance with the WEM Rules (Chapter 10 Market Information) and the Confidentiality Classification of the requested information.
- Western Power may be required to consult relevant Information Stakeholders when reviewing the individual requests.
- Western Power may charge a fee for the preparation and disclosure of any information that is not already published or required to be disclosed.
WEM Procedure changes
If you would like to propose a change to any of Western Power’s published WEM Procedures or WEM Guidelines, please contact us.