ElectraNet experienced multiple faults on the transmission network Friday 14th March 2025 impacting power supply to the Yorke Peninsula.

A short note, just as a record for our future reference, linked through to this update from Electranet on LinkedIn on Friday 14th March 2025:

2025-03-14-LinkedIn-ElectraNet

 

Taking a quick look now, I see published two relevant Market Notices in quick succession, starting with MN125620 at 06:03:11 (NEM time) as follows:

‘——————————————————————-
MARKET NOTICE
——————————————————————-

From :              AEMO
To   :              NEMITWEB1
Creation Date :     14/03/2025     06:03:11

——————————————————————-

Notice ID               :         125620
Notice Type ID          :         INTER-REGIONAL TRANSFER
Notice Type Description :         Inter-Regional Transfer limit variation
Issue Date              :         14/03/2025
External Reference      :         Inter-regional transfer limit variation – Hummocks – Bungama 132 kV line – SA region – 14/03/2025

——————————————————————-

Reason :

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation – Hummocks – Bungama 132 kV line – SA region – 14/03/2025

At   0457 hrs 14/03/2025 there was an unplanned outage of Hummocks – Bungama 132 kV line.

The following constraint set(s) invoked at 0505 hrs 14/03/2025
S-HUBG

This constraint set(s) contains equations with the following interconnectors on the LHS.
V-S-MNSP1,V-SA

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

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

… and then, two seconds later, MN125621 as follows:

‘——————————————————————-
MARKET NOTICE
——————————————————————-

From :              AEMO
To   :              NEMITWEB1
Creation Date :     14/03/2025     06:03:13

——————————————————————-

Notice ID               :         125621
Notice Type ID          :         INTER-REGIONAL TRANSFER
Notice Type Description :         Inter-Regional Transfer limit variation
Issue Date              :         14/03/2025
External Reference      :         Inter-regional transfer limit variation – Hummocks – Waterloo 132 kV line – SA region – 14/03/2025

——————————————————————-

Reason :

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation – Hummocks – Waterloo 132 kV line – SA region – 14/03/2025

At   0457 hrs 14/03/2025 there was an unplanned outage of Hummocks – Waterloo 132 kV line.

The following constraint set(s) invoked at 0505 hrs 14/03/2025
S-HUWT

This constraint set(s) contains equations with the following interconnectors on the LHS.
V-S-MNSP1

Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations

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

I’ve also grabbed p48/126 of the ElectraNet TAPR for 2024 to provide some geographical context:

2025-03-15-ElectraNet-TAPR-Map

 

 

… will look a bit more in subsequent articles (to the extent time permits).


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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