Market Notices

91281POWER SYSTEM EVENTS29/09/2021 09:15:29 AM

Update - Non-credible contingency event - NSW region - 28/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - NSW region - 28/09/2021

Refer AEMO ELECTRICITY MARKET NOTICE MN 91278

At 0854 hrs the Broken Hill - Silverton X6 220 kV Line and the Silverton 220kV/33kV Transformer 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
91278POWER SYSTEM EVENTS28/09/2021 11:40:21 PM

Correction - Non-credible contingency event - Silverton - NSW region - 28/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Correction to Market Notice 91277

At 2233 hrs the Broken Hill - Silverton X6 220 kV Line, the Silverton 220kV/33kV Transformer (which disconnected Silverton Wind Farm) and the Broken Hill Solar Farm 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.

Refer to AEMO Network Outage Scheduler (NOS) for further details.

Manager NEM Real Time Operations
91277POWER SYSTEM EVENTS28/09/2021 11:27:25 PM

Non-credible contingency event - Silverton - NSW region - 28/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - Silverton - NSW region - 28/09/2021

At 2233 hrs the Broken Hill - Silverton X6 220 kV Line, the Silverton 220kV/33kV Transformer (which disconnected Silverton Wind Farm) and the Silverton Solar Farm 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.

Refer to AEMO Network Outage Scheduler (NOS) for further details.

Manager NEM Real Time Operations
91270POWER SYSTEM EVENTS28/09/2021 04:25:00 PM

Non-credible contingency event - SA region - 28/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - SA region - 28/09/2021

At 1555 hrs the Davenport West 275 kV Bus, Davenport to Mt Lock 275 kV Line and Davenport No2 Synchronous Condenser 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.

The following constraint set was invoked at 1605 hrs

S-DVLK_BC-2CP

The constraint sets contain equations with the following interconnector on the LHS:

V-S-MNSP1
V-SA

Refer to AEMO Network Outage Scheduler (NOS) for further details.

Manager NEM Real Time Operations
90966POWER SYSTEM EVENTS22/09/2021 07:44:32 PM

Update - Non-credible contingency event - Torrens Island 66 kV East Bus - SA region - 22/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Update - Non-credible contingency event - Torrens Island 66 kV East Bus - SA region - 22/09/2021

At 1740 hrs the Torrens Island 66 kV East bus tripped. The bus was returned to service at 1846 hrs.

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.

Refer AEMO Electricity Market Notice 90963

Manager NEM Real Time Operations
90963POWER SYSTEM EVENTS22/09/2021 06:14:24 PM

Non-credible contingency event - SA region - 22/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - SA region - 22/09/2021

At 1740 hrs the Torrens Island 66 kV East busbar 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
90955POWER SYSTEM EVENTS22/09/2021 02:38:44 PM

Update - Non-credible contingency event - VIC region - 22/09/2021

AEMO ELECTRICITY MARKET NOTICE

Update - Non-credible contingency event - VIC region - 22/09/2021

At 0916 hrs the Springvale No. 1 220 kV busbar tripped.

Refer AEMO ELECTRICITY MARKET NOTICE MN90937 and MN90939

At 0925 hrs the Springvale No. 1 220 kV busbar was returned to service.

Further investigation has identified that this was a credible contingency event.


Manager NEM Real Time Operations
90950POWER SYSTEM EVENTS22/09/2021 12:01:24 PM

Non-credible contingency event - SA region - 22/09/2021

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - SA region - 22/09/2021

At 1134 hrs the No. 1 and No. 2 275 kV Static Var Compensator (SVC) at South East Substation 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.

The following constraint set was invoked at 1145 hrs

S-X_SEVC2+PAVC

The constraint sets contain equations with the following interconnector on the LHS:

V-S-MNSP1
V-SA

Refer to AEMO Network Outage Scheduler (NOS) for further details.

Manager NEM Real Time Operations
90939POWER SYSTEM EVENTS22/09/2021 10:26:19 AM

Update - Non-credible contingency event - VIC region - 22/09/2021

AEMO ELECTRICITY MARKET NOTICE

Update - Non-credible contingency event - VIC region - 22/09/2021

At 0916 hrs the Springvale No. 1 220 kV busbar tripped.

Refer AEMO ELECTRICITY MARKET NOTICE MN90937

At 0925 hrs the Springvale No. 1 220 kV busbar 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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