AEMO notes ‘Non-credible contingency event’ at Jeeralang

No sooner had we noted that ‘AEMO changes mind, and directs Murray instead (to run as syncon) for System Strength in Victoria on Wednesday 15th October 2025’ then we receive MN129618 at 09:00 that provides some clues as to why the AEMO might have changed its mind about relying on Jeeralang for provision of System Strength:

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MARKET NOTICE
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From :              AEMO
To   :              NEMITWEB1
Creation Date :     15/10/2025     09:00:59

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Notice ID               :         129618
Notice Type ID          :         POWER SYSTEM EVENTS
Notice Type Description :         Emergency events/conditions
Issue Date              :         15/10/2025
External Reference      :         Non-credible contingency event – VIC region – 15/10/2025

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Reason :

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event – VIC region – 15/10/2025

At 0843 hrs the JLTS No.2 220kV bus 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

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END OF REPORT

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Maybe that’s all for now?

PS1 an update at 09:46

At 09:46 the AEMO published MN129622 as follows:

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MARKET NOTICE
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From : AEMO
To : NEMITWEB1
Creation Date : 15/10/2025 09:46:39

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Notice ID : 129622
Notice Type ID : POWER SYSTEM EVENTS
Notice Type Description : Emergency events/conditions
Issue Date : 15/10/2025
External Reference : Update – Non-credible contingency event – VIC region – 15/10/2025

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Reason :

AEMO ELECTRICITY MARKET NOTICE.

Update – Non-credible contingency event – VIC region – 15/10/2025

Refer AEMO Electricity Market Notice 129618

At 0906 hrs the JLTS No.2 220kV bus was returned to service.

The cause of this non-credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.

AEMO will not reclassify this event as a credible contingency event.

Manager NEM Real Time Operations

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END OF REPORT
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