Market Notices

54985POWER SYSTEM EVENTS28/09/2016 04:24:43 PM

AEMO advises that a Black system condition exists in the South Australia region

AEMO ELECTRICITY MARKET NOTICE.

Power system emergency-Black system condition

AEMO advises that a Black system condition exists in the South Australia region

Manager NEM Real Time Operations
54933POWER SYSTEM EVENTS18/09/2016 09:51:10 PM

Update - Non-credible contingency event - Qld region - 18/09/16

AEMO ELECTRICITY MARKET NOTICE

Update - Non-credible contingency event - Qld region - 18/09/16

Update to MN 54932.

At 2135 hrs the Ross 4 Transformer 132 kV CB 4442 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
54932POWER SYSTEM EVENTS18/09/2016 08:59:12 PM

Non-credible contingency event - Qld region - 18/09/16

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Qld region - 18/09/16

At 1956 hrs the Ross 4 Transformer 132 kV CB 4442 opened at the 132 kV connection only.

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
54639POWER SYSTEM EVENTS31/07/2016 06:25:53 AM

Non-credible contingency event - Tas Region - 31 July 2016

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Tas Region - 31 July 2016

At 0602 hrs the Farrell - Reece No 1 and the Farrell - Reece No 2 220 kV Lines tripped.

AEMO did not instruct load shedding.

AEMO has not been advised of any disconnection of bulk electrical load.

AEMO will reclassify this event as a credible contingency event due to lightning

Manager NEM Real Time Operations
54498POWER SYSTEM EVENTS14/07/2016 02:27:07 AM

Non-credible contingency event - Queensland Region - 14/07/16

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Queensland Region - 14/07/16

At 0103 hrs the Woree 275kV circuit breaker 8772 opened automatically offloading the Challumbin -Woree 275kV line
At 0117 hrs the Challumbin -Woree 275kV line was placed on load

At 0140 hrs the Woree 275kV circuit breaker 8772 opened automatically offloading the Challumbin -Woree 275kV line
At 0206 hrs the Challumbin -Woree 275kV line was placed on load

AEMO has not been advised of any disconnection of bulk electrical load.
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.

Manager NEM Real Time Operations
53981POWER SYSTEM EVENTS16/06/2016 11:31:54 AM

Non-credible contingency event - Vic region - 16/06/16

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Vic region - 16/06/16

At 1106 hrs the following plant tripped.
Loy Yang No. 1 and No. 3 500 kV Bus
Hazelwood - Loy Yang No. 2 500 kV Line
Loy Yang No. 1 500/220 kV Transformer
Loy Yang A1 generating unit

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 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
53874POWER SYSTEM EVENTS11/06/2016 10:32:06 AM

Non-credible contingency event - NSW region - 11 June 2016

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - NSW region - 11 June 2016

At 0950 hrs the Wagga substation 132kV B bus, the No2 and the No3 330/132kV transformers tripped.

AEMO did not observe any reduction in electrical demand
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

53705POWER SYSTEM EVENTS08/06/2016 02:45:06 AM

Update - Non-Credible Contingency Event - Vic Region - 8 June 2016

AEMO ELECTRICITY MARKET NOTICE

Update - Non-credible contingency event - Victoria region - 8 June 2016

Update to MN 53704

At 0219 hrs the Yallourn No. 2 220 kV bus 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
53704POWER SYSTEM EVENTS08/06/2016 01:41:50 AM

Non-Credible Contingency Event - Vic Region - 8 June 2016

AEMO ELECTRICITY MARKET NOTICE

Non-credible contingency event - Victoria region - 8 June 2016

At 0129 hrs the Yallourn No. 2 220 kV bus 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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