Loss of ~2000MW of demand in Queensland on Tuesday 25th May

Posted by Paul McArdle Tuesday, May 25 2021 Topic: 2021 - 25th May - Callide C4 Explosion, Fire and Outage, 2021-05-25 Load Shedding in QLD after Callide explosion, Autumn 2021 in the NEM

A quick snapshot from NEMwatch at 14:20 today highlighting the loss of approximately 2000MW of demand this afternoon – dropping the level of Scheduled Demand down to 3,775MW:

2021-05-25-at-14-20-NEMwatch-QLD-DemandDrop

The AEMO Market Notice highlighted says:

——————————————————————-
MARKET NOTICE
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From :              AEMO
To   :              NEMITWEB1
Creation Date :     25/05/2021     14:10:44

——————————————————————-

Notice ID               :         85926
Notice Type ID          :         POWER SYSTEM EVENTS
Notice Type Description :         Emergency events/conditions
Issue Date              :         25/05/2021
External Reference      :         Non-credible contingency event – Qld region – 25/05/2021

——————————————————————-

Reason :

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event – Qld region – 25/05/2021

At 1344 hrs the Callide C Power station generating units C3 and C4 tripped.

AEMO did not instruct load shedding.

AEMO has not been advised of any disconnection of bulk electrical load.

The cause of this non credible contingency event is not known at this stage.

Manager NEM Real Time Operations

——————————————————————-
END OF REPORT
——————————————————————-

 

 

We can see the loss in generation output in the chart at the bottom of the NEMwatch snapshot.

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PS…  at 15:09 this series of tweets from CS Energy provided more context to an origination of the problems:

2021-05-25-tweet-CSenergy

I will see what I can do for a more detailed ‘Part 2’ Case Study of this event later at WattClarity.

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About the Author

Paul McArdle
Paul was one of the founders of Global-Roam in February 2000. He is currently the CEO of the company and the principal author of WattClarity. Writing for WattClarity has become a natural extension of his work in understanding the electricity market, enabling him to lead the team in developing better software for clients. Before co-founding the company, Paul worked as a Mechanical Engineer for the Queensland Electricity Commission in the early 1990s. He also gained international experience in Japan, the United States, Canada, the UK, and Argentina as part of his ES Cornwall Memorial Scholarship.

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8 Trackbacks & Pingbacks

  1. Hold onto your hats … QLD’s supply demand balance forecast to be very tight in the hours ahead … Tue 25th May 2021 (Part 2) – WattClarity
  2. QLD dodged a bullet …. Tue 25th May 2021 (Part 3)? – WattClarity
  3. Callide C4 (tentatively) offline for a year – following turbine hall fire yesterday! – WattClarity
  4. Updated list of events on 25th May 2021 that we’ll be investigating – time permitting – WattClarity
  5. Callide C3's return to service pushed back to February 2023 - WattClarity
  6. More delays in expected Return to Service (RTS) for both Callide C3 and C4 - WattClarity
  7. The never-ending story? More delays in return-to-service at both Callide C3 and C4 - WattClarity
  8. Two news updates from CS Energy on Wed 17th July 2024 … the (final) Brady Report (about Callide C4), and the Hartz EPM Report (on the Cooling Towers) - WattClarity

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