System frequency while NSW demand yo-yos

Posted by Linton CorbetMonday 23rd March 2026  5:20 PM   Topic: 2026-03-23, 2026-03-23 Market Suspension with SCADA Failure

Following our observations of Riding the yo-yo, during NSW market suspension we inspect system frequency during the day.

It has remained within the NOFB.

Yet it has also swung well about the nominal 50 Hz, and well into PFR territory (+ and – 0.015 Hz).

The series in orange is the frequency (Hz) and the blue box highlights the period when the demand oscillations occurred.

A sub-plot using ez2view’s Trends presents NSW market demand (MW) in green for the period of the oscillations, intervals 12:45 to 15:15.

 

 

 

 

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About the Author

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Linton Corbet
Linton is a Senior Software Engineer and Market Analyst, who joined Global-Roam in August 2020. Before joining the company, Linton worked at the Australian Energy Market Operator (AEMO) for seven years, including four years as an analyst within their demand forecasting team. Before entering the energy sector, he worked as an air quality scientist in the Czech Republic.

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