Market Notices

112974GENERAL NOTICE01/01/2024 09:58:53 PM

Update - Lightning vulnerable equipment in QLD region

AEMO ELECTRICITY MARKET NOTICE.

Update - Lightning vulnerable equipment in QLD region

Special Reclassification of Transmission Equipment during lightning

Refer to AEMO Electricity Market Notice 112581 and 112884.

At 1424 hrs 21/12/2023, the Middle Ridge 275 kV circuit breakers 5432 and 5422 tripped. This offloaded the H14 Middle Ridge No.2 and No. 3 275/110 kV transformers

The cause of the trip was identified as due to lightning.

In accordance with SO_OP_3715, AEMO now considers the H14 Middle Ridge No. 2 and No. 3 275/110 kV transformers to be vulnerable due to lightning.

Manager NEM Real Time Operations
112942GENERAL NOTICE31/12/2023 04:00:58 PM

Cancellation of Minimum System Load 1 (MSL1) in the VIC Region on 31/12/2023

AEMO ELECTRICITY MARKET NOTICE

Cancellation - MSL1 - VIC Region

Refer Market Notice 112936

The MSL1 condition for 31/12/2023 is cancelled at 1600 hrs 31/12/2023

Manager NEM Real Time Operations
112936GENERAL NOTICE31/12/2023 10:47:14 AM

Minimum System Load 1 (MSL1) in the VIC Region on 31/12/2023

AEMO ELECTRICITY MARKET NOTICE

AEMO has detected that there is an elevated risk of insufficient demand to maintain a secure operating state in the Victorian region from 1100 hrs 31/12/2023 to 1400 hrs 31/12/2023.
Minimum scheduled demand is forecast to be 1300 MW at 1300 hrs and the secure threshold for the forecast operating conditions is 2,000 MW.
AEMO is seeking a market response.
An insufficient market response may require AEMO to take action or intervene to maintain power system security in Victoria. This may result in action such as the direction of scheduled generation, curtailment of non-scheduled generation, and/or a direction to increase operational demand.

Manager NEM Real Time Operations
112893INTER-REGIONAL TRANSFER29/12/2023 05:27:51 PM

Inter-regional transfer limit variation - constraint automation to manage Power System Security in QLD region - 29/12/2023

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - constraint automation to manage Power System Security in QLD region - 29/12/2023

In order to maintain the power system in a secure operating state in the QLD region, AEMO has invoked automated constraint set CA_SYDS_549FBEF5 from 1650 hrs until further notice.

This constraint set contains equations with the following interconnector on the LHS;

N-Q-MNSP1

Manager NEM Real Time Operations
112860INTER-REGIONAL TRANSFER29/12/2023 04:03:53 AM

Inter-regional transfer limit variation - Para No.1 and No.2 275 kV SVC - SA region - 29/12/2023

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation -Para No.1 and No.2 275 kV SVC - SA region - 29/12/2023

At 0355 hrs 29/12/2023 there was a short notice outage of Para No.1 and No.2 275 kV SVC.

The following constraint set(s) invoked at 0355 hrs 29/12/2023
S-X_PA_VC_2

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


Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations
112859INTER-REGIONAL TRANSFER29/12/2023 01:58:35 AM

Inter-regional transfer limit variation - Para No.1 275 kV SVC - SA region - 29/12/2023

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation -Para No.1 275 kV SV - SA region - 29/12/2023

At 0145 hrs 29/12/2023 there was a short notice outage of Para No.1 275 kV SVC.

The following constraint set(s) invoked at 0145 hrs 29/12/2023
S-PA_VC1

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


Refer to the AEMO Network Outage Scheduler for further information.

Manager NEM Real Time Operations
112858INTER-REGIONAL TRANSFER28/12/2023 09:43:00 PM

Inter-regional transfer limit variation - Blyth West - Munno Para 275 kV line - SA region - 28/12/2023

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Blyth West - Munno Para 275 kV line - SA region - 28/12/2023

At 2115 hrs 28/12/2023 there was an unplanned outage of the Blyth West - Munno Para 275 kV line.

The following constraint set(s) invoked at 2125 hrs 28/12/2023
S-BWMP

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
112854INTER-REGIONAL TRANSFER28/12/2023 07:32:53 PM

Inter-regional transfer limit variation - Hummocks - Waterloo 132 kV line - SA region - 28/12/2023

AEMO ELECTRICITY MARKET NOTICE

Inter-regional transfer limit variation - Hummocks - Waterloo 132 kV line - SA region - 28/12/2023

At 1913 hrs 28/12/2023 there was an unplanned outage of the Hummocks - Waterloo 132 kV line.

The following constraint set(s) invoked at 1925 hrs 28/12/2023
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
112853INTER-REGIONAL TRANSFER28/12/2023 07:07:21 PM

Cancellation - Inter-regional transfer limit variation - constraint automation to manage Power System Security in QLD region - 28/12/2023

AEMO ELECTRICITY MARKET NOTICE

Cancellation - Inter-regional transfer limit variation - constraint automation to manage Power System Security in QLD region - 28/12/2023

Refer AEMO Electricity Market Notice 112852.

Constraint set CA_SYDS_549FBEF5 revoked 1850 hrs.

This constraint set contains equations with the following interconnector on the LHS;

N-Q-MNSP1


Manager NEM Real Time Operations
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