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Non-credible contingency event more likely to occur due to existence of abnormal condition/s - Victoria region.
AEMO has identified that a non-credible contingency event is more likely to occur because of the existence of abnormal conditions namely severe weather and damaging winds in the Victoria region.
As at the time of this notice the criteria for reclassification of any non-credible contingency event have been met and there is a possibility of severe weather impacting multiple transmission elements in its vicinity.
Conditions can change rapidly and potentially impacted plant may change. Further notices will only be published to advise of any reclassification, or when the abnormal conditions have ceased to impact the likelihood of a non-credible event occurring.
Constraint set I-VS_250 invoked at 0935 hrs 28/01/2022 until further notice.
Manager NEM Real Time Operations
STPASA - Update of the Forecast Lack Of Reserve Level 1 (LOR1) in the QLD Region beginning on 01/02/2022
AEMO declares a Forecast LOR1 condition under clause 4.8.4(b) of the National Electricity Rules for the QLD region for the following periods:
[1.] From 1800 hrs 01/02/2022 to 1900 hrs 01/02/2022.
The forecast capacity reserve requirement is 878 MW.
The minimum capacity reserve available is 682 MW.
[2.] From 1600 hrs 02/02/2022 to 1700 hrs 02/02/2022.
The forecast capacity reserve requirement is 837 MW.
The minimum capacity reserve available is 489 MW.
[3.] From 1930 hrs 02/02/2022 to 2000 hrs 02/02/2022.
The forecast capacity reserve requirement is 870 MW.
The minimum capacity reserve available is 796 MW.
Manager NEM Real Time Operations
STPASA - Update of the Forecast Lack Of Reserve Level 2 (LOR2) in the QLD Region on 02/02/2022
AEMO declares a Forecast LOR2 condition under clause 4.8.4(b) of the National Electricity Rules for the QLD region for the following period:
[1.] From 1700 hrs 02/02/2022 to 1930 hrs 02/02/2022.
The forecast capacity reserve requirement is 443 MW.
The minimum capacity reserve available is 189 MW.
AEMO is seeking a market response.
AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.
Manager NEM Real Time Operations
Cancellation of a Non-Credible Contingency Event: Hazelwood - Rowville No.1 220kV line and Hazelwood - Rowville No.2 220kV line in VIC1 due to Lightning.
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: VIC1
Lines: Hazelwood - Rowville No.1 220kV and Hazelwood - Rowville No.2 220kV
Cancellation time: 27/01/2022 23:29
Constraint set(s) revoked:
V-HWRO_R_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NONE
Refer AEMO Electricity Market Notice 94122
Auto-generated on behalf of Manager NEM Real Time Operations
Cancellation of the reclassification of a Non-Credible Contingency Event: Brinkworth-Davenport, Brinkworth-Templers West and Para-Templers West 275kV lines in SA due to severe weather warning.
AEMO considers the simultaneous trip of the following circuits is no longer reasonably possible. There is no longer any severe weather warning in the vicinity of the following lines. Accordingly, its classification has reverted to a non-credible contingency event.
Region: SA
Lines: Brinkworth-Davenport, Brinkworth-Templers West and Para-Templers West 275kV lines
Cancellation time: 2310 hrs 27/01/2022
Constraint set(s) revoked: Nil
Refer AEMO Electricity Market Notice 94121
Manager NEM Real Time Operations
Cancellation - Non-credible contingency event more likely to occur due to existence of abnormal condition/s - Victoria region.
Abnormal conditions advised in AEMO Electricity Market Notice 94116 have ceased to impact the likelihood of a non-credible event occurring as at 2245 hrs 27/01/2022.
Manager NEM Real Time Operations
Update - Non-credible contingency event - Vic region - 27/01/2022
Update - Non-credible contingency event - Vic region - 27/01/2022
Refer AEMO ELECTRICITY MARKET NOTICE MN 94123
At 2235 hrs the Eildon 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
STPASA - Forecast Lack Of Reserve Level 2 (LOR2) in the QLD Region on 02/02/2022
AEMO declares a Forecast LOR2 condition under clause 4.8.4(b) of the National Electricity Rules for the QLD region for the following period:
[1.] From 1800 hrs 02/02/2022 to 1900 hrs 02/02/2022.
The forecast capacity reserve requirement is 443 MW.
The minimum capacity reserve available is 420 MW.
AEMO is seeking a market response.
AEMO has not yet estimated the latest time it would need to intervene through an AEMO intervention event.
Manager NEM Real Time Operations
Non-credible contingency event - Vic region - 27/01/2022
Non-credible contingency event - Vic region - 27/01/2022
At 2044 hrs the Eildon No. 2 220 kV Bus tripped which off-loaded the Mount Beauty - Eildon No. 1 220 kV Line.
AEMO did not instruct load shedding.
The cause of this non credible contingency event is not known at this stage.
Manager NEM Real Time Operations