Semi scheduled generators - Proposed rule changes

  • Accepting submissions
Date initiated: 
24 June 2020


The Australian Energy Regulator (AER) has released an issues paper on proposed rule change(s) for semi scheduled generators.

The issues paper presents an analysis on the Council of Australian Governments Energy Council (COAG EC) request for the AER to develop two rule change proposals to support system security in the National Electricity Market (NEM). Specifically, the requests from COAG EC were:

  • That semi scheduled generators be obligated to follow their dispatch targets in a similar manner to scheduled generators; and
  • Semi scheduled generators being required to continually inform the AEMO of any restrictions on their available capacity due to physical factors, ambient weather conditions and their market intentions.

Key points of the issue paper include:

  • Analysis and evidence that some semi scheduled generators have begun to deviate from their instructed output and how this behaviour has been increasing over time.
  • The impact this behaviour is having on the NEM now, and potentially in to the future.
  • The benefits of having greater certainty of the output of semi scheduled generation

 The issues paper also presents potential options for the rule change(s) to address the request.

Public consultation

Interested parties are invited to participate in a webex workshop with the AER on Thursday 2 July 2020.

Interested parties are invited to make submissions on the issues paper by the close of business on 22 July 2020.