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, supply portfolio curve, and demand portfolio curve. Participants are able to query and cancel submissions for an individual Trading Interval, or a range of Trading Intervals. Submission allows participants to submit details on their intent in STEM.

The Bilateral submission allows participants to submit their bilateral levels for the Trading Day into the Wholesale Electricity Market (WEM). 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 currently accessible in the RFM and PROD environments, using either the current (Market Trial/ PROD) local certificates or new (Market Trial/ PROD) DigiCerts. Note that a PROD certificate will only work in the PROD environment, whereas a Market Trial certificate will work in both MKT and RFM. 

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

More information is available in the Technical specifications and guides page on The Reformer site.

For support, contact: WA Energy Market Management

Email: wa.operations@aemo.com.au