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        • 67910 25 Mar 2019 22:51 POWER SYSTEM EVENTS
        • Update - Non-credible contingency event - Tas region - 25/03/2019


          AEMO ELECTRICITY MARKET NOTICE.

          Update - Non-credible contingency event - Tas region - 25/03/2019

          Refer to MN 67906

          At 1757 hrs the Chapel St - Gordon No2 220 kV Line and the Gordon No3 Gen tripped.

          At 2210 hrs the Chapel St - Gordon No2 220 kV Line was returned to service. Gordon No 3 Gen remains out of service (pending further investigations).

          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 still under investigation.

          Manager NEM Real Time Operations

        • 67909 25 Mar 2019 19:29 RECLASSIFY CONTINGENCY
        • Cancellation of a Non-Credible Contingency Event: Norwood - Scottsdale - Derby line and Norwood - Scottsdale line in TAS1 due to Lightning.

          AEMO ELECTRICITY MARKET NOTICE

          Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.

          Region: TAS1

          Lines: Norwood - Scottsdale - Derby and Norwood - Scottsdale

          Cancellation time: 25/03/2019 19:29

          Constraint set(s) revoked:
          NONE

          Refer AEMO Electricity Market Notice 67907

          Auto-generated on behalf of Manager NEM Real Time Operations

        • 67908 25 Mar 2019 19:19 RECLASSIFY CONTINGENCY
        • Cancellation of a Non-Credible Contingency Event: Farrell-John Butters line and Farrell-Rosebery-Newton-Queenstown line in TAS1 due to Lightning.

          AEMO ELECTRICITY MARKET NOTICE

          Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.

          Region: TAS1

          Lines: Farrell-John Butters and Farrell-Rosebery-Newton-Queenstown

          Cancellation time: 25/03/2019 19:19

          Constraint set(s) revoked:
          NONE

          Refer AEMO Electricity Market Notice 67905

          Auto-generated on behalf of Manager NEM Real Time Operations

        • 67907 25 Mar 2019 18:25 RECLASSIFY CONTINGENCY
        • Reclassification of a Non-Credible Contingency Event: Norwood - Scottsdale - Derby line and Norwood - Scottsdale line in TAS1 due to Lightning.

          AEMO ELECTRICITY MARKET NOTICE

          Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.

          Region: TAS1

          Lines: Norwood - Scottsdale - Derby and Norwood - Scottsdale

          Duration: 25/03/2019 18:25 until further notice

          Constraint set(s) invoked:
          NONE

          Auto-generated on behalf of Manager NEM Real Time Operations

        • 67906 25 Mar 2019 18:18 POWER SYSTEM EVENTS
        • Non-credible contingency event - Tas region - 25/03/2019


          AEMO ELECTRICITY MARKET NOTICE.

          Non-credible contingency event - Tas region - 25/03/2019

          At 1757 hrs the Chapel St - Gordon No2 220 kV Line and the Gordon No3 Gen 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

        • 67905 25 Mar 2019 15:16 RECLASSIFY CONTINGENCY
        • Reclassification of a Non-Credible Contingency Event: Farrell-John Butters line and Farrell-Rosebery-Newton-Queenstown line in TAS1 due to Lightning.

          AEMO ELECTRICITY MARKET NOTICE

          Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.

          Region: TAS1

          Lines: Farrell-John Butters and Farrell-Rosebery-Newton-Queenstown

          Duration: 25/03/2019 15:16 until further notice

          Constraint set(s) invoked:
          NONE

          Auto-generated on behalf of Manager NEM Real Time Operations

        • 67904 25 Mar 2019 14:14 RECLASSIFY CONTINGENCY
        • Cancellation of a Non-Credible Contingency Event: Farrell-John Butters line and Farrell-Rosebery-Newton-Queenstown line in TAS1 due to Lightning.

          AEMO ELECTRICITY MARKET NOTICE

          Cancellation of reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any lightning activity in the vicinity of the following lines. Accordingly its classification has reverted to a non-credible contingency event.

          Region: TAS1

          Lines: Farrell-John Butters and Farrell-Rosebery-Newton-Queenstown

          Cancellation time: 25/03/2019 14:14

          Constraint set(s) revoked:
          NONE

          Refer AEMO Electricity Market Notice 67901

          Auto-generated on behalf of Manager NEM Real Time Operations

        • 67903 25 Mar 2019 14:07 MARKET INTERVENTION
        • Cancellation - AEMO Intervention Event - Intervention price dispatch intervals - Direction South Australia region 24/03/2019

          AEMO ELECTRICITY MARKET NOTICE

          Cancellation - AEMO Intervention Event - Intervention price dispatch intervals - Direction South Australia region 24/03/2019

          Refer Electricity Market Notices 67868 and 67869

          The AEMO Intervention Event and all associated directions are cancelled from 1400 hrs 25/03/2019.

          Manager NEM Real Time Operations

        • 67901 25 Mar 2019 11:10 RECLASSIFY CONTINGENCY
        • Reclassification of a Non-Credible Contingency Event: Farrell-John Butters line and Farrell-Rosebery-Newton-Queenstown line in TAS1 due to Lightning.

          AEMO ELECTRICITY MARKET NOTICE

          Reclassification of a Non-Credible Contingency Event as a Credible Contingency Event due to Lightning. AEMO considers the simultaneous trip of the following circuits to now be more likely and reasonably possible. Accordingly AEMO has reclassified it as a credible contingency event.

          Region: TAS1

          Lines: Farrell-John Butters and Farrell-Rosebery-Newton-Queenstown

          Duration: 25/03/2019 11:10 until further notice

          Constraint set(s) invoked:
          NONE

          Auto-generated on behalf of Manager NEM Real Time Operations