About the non-credible contingency event in TAS on Thursday 19th September 2024

At 13:54 the AEMO published Market Notice 118320 as follows:

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MARKET NOTICE
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From :              AEMO
To   :              NEMITWEB1
Creation Date :     19/09/2024     13:54:59

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Notice ID               :         118320
Notice Type ID          :         POWER SYSTEM EVENTS
Notice Type Description :         Emergency events/conditions
Issue Date              :         19/09/2024
External Reference      :         Non-credible contingency event – TAS region – 19/09/2024

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Reason :

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event – TAS region – 19/09/2024

At 1340 hrs the Gordon – Chapel St No1 and No 2 220 kV lines 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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This was followed by Market Notice 118321 at 15:28 as follows:

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MARKET NOTICE
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From :              AEMO
To   :              NEMITWEB1
Creation Date :     19/09/2024     15:28:41

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Notice ID               :         118321
Notice Type ID          :         POWER SYSTEM EVENTS
Notice Type Description :         Emergency events/conditions
Issue Date              :         19/09/2024
External Reference      :         Update – Non-credible contingency event – TAS region – 19/09/2024

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Reason :

AEMO ELECTRICITY MARKET NOTICE.

Update – Non-credible contingency event – TAS region – 19/09/2024

At 1340 hrs the Gordon – Chapel St No1 and No 2 220 kV lines tripped.

AEMO did not instruct load shedding.

AEMO has advised of approximately 112 MW disconnection of bulk electrical load,
disconnection of generation at Studland Bay Wind generator (71 MW) and 23 MW generation reduction at Gordon Power station.

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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Out of curiosity I had a quick look using Time-Travel in ez2view, focused on the 13:45 dispatch interval as follows:

Nothing further, at this point.