System Management is required to submit a report setting out its ancillary services requirements and plan to the ERA for audit and approval each year. System Management’s ancillary services reports are available on AEMO’s website.
Ancillary services are required to maintain power system security and reliability, facilitate orderly trading in electricity and ensure that electricity supplies are of acceptable quality.
The ERA's first audit was undertaken for the 2017/2018 year. The ERA’s report and System Management’s response is available below.