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54994POWER SYSTEM EVENTS28/09/2016 04:53:13 PM
AEMO has become aware of the following circumstance(s) with respect to the South Australian power system,
AEMO ELECTRICITY MARKET NOTICE.
POWER SYSTEM EVENT
AEMO has become aware of the following circumstance(s) with respect to the power system,
At 1618 hrs the SA power system separated from the NEM and became black. A very large lightning storm was traveling across the state at the time.
The exact number of effected transmission elements are unknown at this time.
Approximately 1900MW was shed as part of this incident. All generation and load in SA was lost.
AEMO has initiated its South Australian black start procedures and has begun restoring South Australia from two sources.
AEMO has issued this Market Notice in accordance with the NER Cl 4.8.3.
Manager NEM Real Time Operations
POWER SYSTEM EVENT
AEMO has become aware of the following circumstance(s) with respect to the power system,
At 1618 hrs the SA power system separated from the NEM and became black. A very large lightning storm was traveling across the state at the time.
The exact number of effected transmission elements are unknown at this time.
Approximately 1900MW was shed as part of this incident. All generation and load in SA was lost.
AEMO has initiated its South Australian black start procedures and has begun restoring South Australia from two sources.
AEMO has issued this Market Notice in accordance with the NER Cl 4.8.3.
Manager NEM Real Time Operations
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
Power system emergency-Black system condition
AEMO advises that a Black system condition exists in the South Australia region
Manager NEM Real Time Operations
54949SETTLEMENTS RESIDUE22/09/2016 08:00:23 PM
[EventId:201609222000_NRM_QLD1_NSW1_stopped] NEGRES CONSTRAINT NRM_QLD1_NSW1 ceased operating from 22 September 2016 20:00
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 2000 hrs on 22 September 2016
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2016.
Refer to market notice: 54947
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the QLD to NSW directional interconnector.
The negative residue constraint NRM_QLD1_NSW1 ceased operating at 2000 hrs on 22 September 2016.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 2000 hrs on 22 September 2016
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2016.
Refer to market notice: 54947
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the QLD to NSW directional interconnector.
The negative residue constraint NRM_QLD1_NSW1 ceased operating at 2000 hrs on 22 September 2016.
This is an AEMO autogenerated Market Notice.
54947SETTLEMENTS RESIDUE22/09/2016 06:40:18 PM
[EventId:201609221840_NRM_QLD1_NSW1_started] NEGRES CONSTRAINT NRM_QLD1_NSW1 started operating from 22 September 2016 18:40
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1840 hrs on 22 September 2016
ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2016.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the QLD to NSW directional interconnector.
The negative residue constraint set NRM_QLD1_NSW1 commenced operating from 1840 hrs on 22 September 2016.
This constraint set contains an equation with the following interconnectors on the LHS:
N-Q-MNSP1
NSW1-QLD1
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1840 hrs on 22 September 2016
ACTUAL NEGATIVE SETTLEMENT RESIDUES - QLD to NSW - 22 September 2016.
Electricity Market outcomes have resulted in the accumulation of negative settlement residues that have exceeded the allowable negative residue threshold for the QLD to NSW directional interconnector.
The negative residue constraint set NRM_QLD1_NSW1 commenced operating from 1840 hrs on 22 September 2016.
This constraint set contains an equation with the following interconnectors on the LHS:
N-Q-MNSP1
NSW1-QLD1
The RHS of the constraint equation may be adjusted to manage residues.
This is an AEMO autogenerated Market Notice.
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
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
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
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
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
54472SETTLEMENTS RESIDUE13/07/2016 11:30:15 AM
[EventId:201607131130_NRM_SA1_VIC1_stopped] NEGRES CONSTRAINT NRM_SA1_VIC1 ceased operating from 13 July 2016 11:30
AEMO ELECTRICITY MARKET NOTICE
Issued by Australian Energy Market Operator Ltd at 1130 hrs on 13 July 2016
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - SA to VIC - 13 July 2016.
Refer to market notice: 54468
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the SA to VIC directional interconnector.
The negative residue constraint NRM_SA1_VIC1 ceased operating at 1130 hrs on 13 July 2016.
This is an AEMO autogenerated Market Notice.
Issued by Australian Energy Market Operator Ltd at 1130 hrs on 13 July 2016
CANCELLATION - ACTUAL NEGATIVE SETTLEMENT RESIDUES - SA to VIC - 13 July 2016.
Refer to market notice: 54468
AEMO has ceased taking action to minimize the further accumulation of negative settlement residues on the SA to VIC directional interconnector.
The negative residue constraint NRM_SA1_VIC1 ceased operating at 1130 hrs on 13 July 2016.
This is an AEMO autogenerated Market Notice.