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