AEMO notifies of Scheduling Error (Incident 60) from 24th Jan 2024 to 7th March 2024

In an email communication today, the AEMO notified:

AEMO scheduling error: incident declared

Today, AEMO declared a scheduling error identified under NER 3.8.24. The scheduling error is incident number 60 and it occurred from 24 January 2024 to 7 March 2024 (inclusive).

Registered market participants who believe they may be entitled to compensation under National Electricity Rule 3.16.2 should contact the Wholesale Energy Market Dispute Resolution Adviser.

For more information, visit AEMO’s website or email  << NAME REMOVED >>. ’

From 24th January to 7th March was a span of 43 days (or approximately 1044 hours, noting the times below).


In this report on the AEMO website, the AEMO added:

‘From 0850 hrs on 24/01/2024 to 1845 hrs on 07/03/2024, an error in the Energy Management System (EMS) NSW generator calculation resulted in an underestimation of NSW operational demand and an under-dispatch of generators across the NEM, equivalent to the generation target of Tallawarra B (up to 320 MW).

From 1845 hrs on 07/03/2024 to 1920 hrs on 07/03/2024, a temporary fix corrected the NSW operational demand calculation, but incorrectly dispatched Tallawarra A when it was out of service, resulting in under-dispatch of the remaining NEM generation by approximately 275 MW.

The errors resulted in under-dispatch of 146 MW on average for approximately 100 hours.’


Already, one of our clients has already asked us a question about this (GR Case 00006668) … so it’s likely there are more interested clients.

As an informational service, we thought it might be useful to post this short article (albeit a somewhat cryptic one) today.  Perhaps we will follow with more later.

About the Author

Paul McArdle
One of three founders of Global-Roam back in 2000, Paul has been CEO of the company since that time. As an author on WattClarity, Paul's focus has been to help make the electricity market more understandable.

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