Frequency and time deviation monitoring
AEMO is responsible under the National Electricity Rules (NER) for ensuring that the power system is operated in a safe, secure and reliable manner. As part of this obligation, AEMO is required to maintain power system frequency and time error to within the limits specified in the frequency operating standards determined for mainland National Electricity Market (NEM) regions and Tasmania by the Reliability Panel.
The frequency and time deviation monitoring reference guide summarises the calculation processes.
Three year historical trends report
Archived Three year historical trends reports