Overview

The Short-Term Energy Market (STEM) provides Market Participants with the ability to buy and sell electricity in a day-ahead forward market to manage contracted positions. The STEM processes include the provision of contractual positions, bids and offers for the day-ahead market, and calculation of a Net Contract Position for settlement. 

STEM contains details on Facilities, Portfolio Supply Curve, and Portfolio Demand Curve. Market Participants are able to query and cancel submissions for an individual Trading Interval, or a range of Trading Intervals. Submission allows Market Participants to submit details on their intent in STEM.

The Bilateral Submission allows Market Participants to submit their bilateral levels for the Trading Day into the Wholesale Electricity Market (WEM). Market Participants are also able to query and cancel submissions for an individual Trading Interval, or a range of Trading Intervals.

STEM and Bilateral SOAP APIs are used to view reports and make submissions relating to the STEM and Bilateral components of the WEM. 

Both historic and new APIM endpoints are accessible in the PreProd and Prod environments using new PreProd/Prod DigiCerts.

The STEM and Bilateral XML submissions are based on the mint.xsd schema.

More information on the STEM and Bilateral Web Services Specifications is available on the Guides and useful information page on the AEMO Website.

For support, contact WA Energy Market Management:

• Email: wa.operations@aemo.com.au