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107556MARKET SUSPENSION23/04/2023 04:09:49 PM
Declaration of electricity market resumption
AEMO ELECTRICITY MARKET NOTICE
Declaration of electricity market resumption
Refer initial AEMO Electricity Market Notice 107545
AEMO declares that the suspension of the spot market in Victoria will end at 1700 hrs on 23 April 2023.
The TNSP has taken sufficient steps to exclude the original event having influence on market processes and AEMO assesses that the possibility of suspending the spot market within the next 24 hours due to the same cause is minimal. AEMO also determines that it can operate the market in accordance with the provisions of the NER.
Relevant Market Notices issued under this suspension:
107545 and 107550
Manager NEM Real Time Operations
Declaration of electricity market resumption
Refer initial AEMO Electricity Market Notice 107545
AEMO declares that the suspension of the spot market in Victoria will end at 1700 hrs on 23 April 2023.
The TNSP has taken sufficient steps to exclude the original event having influence on market processes and AEMO assesses that the possibility of suspending the spot market within the next 24 hours due to the same cause is minimal. AEMO also determines that it can operate the market in accordance with the provisions of the NER.
Relevant Market Notices issued under this suspension:
107545 and 107550
Manager NEM Real Time Operations
107550MARKET SUSPENSION23/04/2023 02:33:02 AM
Electricity market suspension change of pricing regime
AEMO ELECTRICITY MARKET NOTICE
Electricity market suspension change of pricing regime
Refer initial AEMO Electricity Market Notice 107545
The Spot Market remains suspended in the following regions with the following pricing regimes from Trading Interval 0435 hrs on 23 April 2023 until further notice:
Victoria from Market Suspension Schedule Pricing to Dispatch Pricing (refer NER clause 3.14.5(d))
The cause of the original issue which affected all Victoria SCADA has not yet been resolved and may still influence market processes, hence, the Spot Market suspension will continue at this stage. However, AEMO has determined it is practicable to dispatch and price the suspended region in accordance with NER clauses 3.8 and 3.9.
Relevant Market Notices issued under this suspension:
107545
Manager NEM Real Time Operation
Electricity market suspension change of pricing regime
Refer initial AEMO Electricity Market Notice 107545
The Spot Market remains suspended in the following regions with the following pricing regimes from Trading Interval 0435 hrs on 23 April 2023 until further notice:
Victoria from Market Suspension Schedule Pricing to Dispatch Pricing (refer NER clause 3.14.5(d))
The cause of the original issue which affected all Victoria SCADA has not yet been resolved and may still influence market processes, hence, the Spot Market suspension will continue at this stage. However, AEMO has determined it is practicable to dispatch and price the suspended region in accordance with NER clauses 3.8 and 3.9.
Relevant Market Notices issued under this suspension:
107545
Manager NEM Real Time Operation
107545MARKET SUSPENSION22/04/2023 04:17:38 PM
Declaration of electricity market suspension
AEMO ELECTRICITY MARKET NOTICE
Declaration of electricity market suspension
AEMO declares the spot market suspended in Victoria with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 1620 hrs on 22 April 2023 until further notice.
Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually.
Refer market notice 107544
Manager NEM Real Time Operation
Declaration of electricity market suspension
AEMO declares the spot market suspended in Victoria with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 1620 hrs on 22 April 2023 until further notice.
Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually.
Refer market notice 107544
Manager NEM Real Time Operation
107527POWER SYSTEM EVENTS18/04/2023 05:51:48 PM
Update - Non-credible contingency event - NSW region - 07/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - NSW region - 07/04/2023
Refer AEMO MN 107349
At 1648 hrs 18/04/2023, the Tamworth SVC 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 - NSW region - 07/04/2023
Refer AEMO MN 107349
At 1648 hrs 18/04/2023, the Tamworth SVC 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
107349POWER SYSTEM EVENTS07/04/2023 11:10:58 PM
Non-credible contingency event - NSW region - 07/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - NSW region - 07/04/2023
At 2257 hrs the Liddell - Tomago 82 330 kV line and the Tamworth SVC 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
Non-credible contingency event - NSW region - 07/04/2023
At 2257 hrs the Liddell - Tomago 82 330 kV line and the Tamworth SVC 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
107335POWER SYSTEM EVENTS07/04/2023 06:56:49 PM
Non-credible contingency event - NSW region - 07/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Refer MN 107334 - Non-credible contingency event more likely to occur due to existence of abnormal condition/s - NSW region.
Non-credible contingency event - NSW region - 07/04/2023
At 1828 hrs the Mt Piper - Bannaby 5A6 500 kV line and Mt Piper - Bannaby 5A7 500 kV line tripped and auto reclosed.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
Manager NEM Real Time Operations
Refer MN 107334 - Non-credible contingency event more likely to occur due to existence of abnormal condition/s - NSW region.
Non-credible contingency event - NSW region - 07/04/2023
At 1828 hrs the Mt Piper - Bannaby 5A6 500 kV line and Mt Piper - Bannaby 5A7 500 kV line tripped and auto reclosed.
AEMO did not instruct load shedding.
AEMO has not been advised of any disconnection of bulk electrical load.
Manager NEM Real Time Operations
107305POWER SYSTEM EVENTS06/04/2023 07:11:14 PM
Non-credible contingency event - SA region - 06/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - SA region - 06/04/2023
At 1814 hrs the Robertstown - North West Bend No 1 Line and the North West Bend - Monash - Berri No 1 Line tripped and auto reclosed.
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
Non-credible contingency event - SA region - 06/04/2023
At 1814 hrs the Robertstown - North West Bend No 1 Line and the North West Bend - Monash - Berri No 1 Line tripped and auto reclosed.
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
107160POWER SYSTEM EVENTS02/04/2023 09:46:00 AM
Non-credible contingency event - Qld region - 01/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Qld region - 01/04/2023
At 1950 hrs 01/04/2023 there was an unplanned outage of Unit 5 and Unit 7 at H48 Braemar 2 Power Station.
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
Non-credible contingency event - Qld region - 01/04/2023
At 1950 hrs 01/04/2023 there was an unplanned outage of Unit 5 and Unit 7 at H48 Braemar 2 Power Station.
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
107152POWER SYSTEM EVENTS01/04/2023 09:52:09 PM
Non-credible contingency event - Qld region - 01/04/2023
AEMO ELECTRICITY MARKET NOTICE.
Non-credible contingency event - Qld region - 01/04/2023
At 2109 hrs ,
- Feeder 877 Woree -Tumoulin 275 kV - tripped and auto reclosed
- Feeder 7166 Chalumbin - Turkinje 132 kV - Tripped and auto reclosed
- Feeder 7143 Kamerunga - Barron Gorge - Tripped
AEMO did not instruct load shedding.
AEMO was advised of disconnection of bulk electrical load of 30 MW.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations
Non-credible contingency event - Qld region - 01/04/2023
At 2109 hrs ,
- Feeder 877 Woree -Tumoulin 275 kV - tripped and auto reclosed
- Feeder 7166 Chalumbin - Turkinje 132 kV - Tripped and auto reclosed
- Feeder 7143 Kamerunga - Barron Gorge - Tripped
AEMO did not instruct load shedding.
AEMO was advised of disconnection of bulk electrical load of 30 MW.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations