Filter by:
Filter by category
Filter by Date
From
To
83084RECLASSIFY CONTINGENCY01/03/2021 04:09:35 PM
Cancellation of a Non-Credible Contingency Event: Lindisfarne - Mornington No.1 TEE line and Lindisfarne - Mornington No.2 TEE 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: Lindisfarne - Mornington No.1 TEE and Lindisfarne - Mornington No.2 TEE
Cancellation time: 01/03/2021 16:09
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 83078
Auto-generated on behalf of Manager NEM Real Time Operations
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: Lindisfarne - Mornington No.1 TEE and Lindisfarne - Mornington No.2 TEE
Cancellation time: 01/03/2021 16:09
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 83078
Auto-generated on behalf of Manager NEM Real Time Operations
83083RECLASSIFY CONTINGENCY01/03/2021 04:05:55 PM
Reclassification of a Non-Credible Contingency Event: Bulli Creek - Dumaresq 8L 330KV line and Bulli Creek - Dumaresq 8M 330KV line in QLD1 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: QLD1
Lines: Bulli Creek - Dumaresq 8L 330KV and Bulli Creek - Dumaresq 8M 330KV
Duration: 01/03/2021 16:05 until further notice
Constraint set(s) invoked:
I-QNI_ONE_PHASE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NSW1-QLD1
Auto-generated on behalf of Manager NEM Real Time Operations
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: QLD1
Lines: Bulli Creek - Dumaresq 8L 330KV and Bulli Creek - Dumaresq 8M 330KV
Duration: 01/03/2021 16:05 until further notice
Constraint set(s) invoked:
I-QNI_ONE_PHASE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NSW1-QLD1
Auto-generated on behalf of Manager NEM Real Time Operations
83082RECLASSIFY CONTINGENCY01/03/2021 04:05:55 PM
Reclassification of a Non-Credible Contingency Event: Condabri Nth - Condabri Central 7400 132kV line and Condabri Nth - Condabri Central 7401 132kV line in QLD1 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: QLD1
Lines: Condabri Nth - Condabri Central 7400 132kV and Condabri Nth - Condabri Central 7401 132kV
Duration: 01/03/2021 16:05 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
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: QLD1
Lines: Condabri Nth - Condabri Central 7400 132kV and Condabri Nth - Condabri Central 7401 132kV
Duration: 01/03/2021 16:05 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
83081CONSTRAINTS01/03/2021 03:49:15 PM
Update - Reclassification of a Non-Credible Contingency Event in Tasmania Region
AEMO ELECTRICITY MARKET NOTICE
Update - Reclassification of a Non-Credible Contingency Event in TAS Region:
Trip of any Tasmanian Transmission Line and Basslink Interconnector
Refer to AEMO Electricity market notices 47360, 47855 and 53957.
In Dec 2014 AEMO reclassified the loss of any transmission line in Tasmania and Basslink Interconnector to be a credible contingency event, for Basslink flow in the direction of Victoria to Tasmania only. This was subsequently updated to exclude faults on either of the two George Town to Pacific Aluminium 220 kV transmission lines or the George Town to Tamar Valley power station 220 kV transmission line in Jan 2015 and Jun 2016 respectively.
Following a power system event in Tasmania on 29/11/2020, and based on updated information from Market Participants, AEMO has further modified this reclassification.
AEMO will now reclassify the loss of any transmission line in Tasmania and Basslink Interconnector to be a credible contingency event, for Basslink flow in the direction of Victoria to Tasmania only.
As a consequence of this reclassification, AEMO will modify the frequency control ancillary service (FCAS) requirements for Tasmania to all require Contingency FCAS services to be sourced from within Tasmania, for Basslink flow in the direction of Victoria to Tasmania.
The following constraint equations will be updated for the above change at 1300hrs Wednesday 3rd March 2020:
F_T++NIL_ML_L5
F_T++NIL_ML_L6
F_T++NIL_ML_L60
F_T++NIL_TL_L5_DS
F_T++NIL_TL_L6_DS
F_T++NIL_TL_L60_DS
F_T+NIL_ML_L5
F_T+NIL_ML_L6
F_T+NIL_ML_L60
F_T+NIL_TL_L5_DS
F_T+NIL_TL_L6_DS
F_T+NIL_TL_L60_DS
Ben Blake
AEMO Operations
Update - Reclassification of a Non-Credible Contingency Event in TAS Region:
Trip of any Tasmanian Transmission Line and Basslink Interconnector
Refer to AEMO Electricity market notices 47360, 47855 and 53957.
In Dec 2014 AEMO reclassified the loss of any transmission line in Tasmania and Basslink Interconnector to be a credible contingency event, for Basslink flow in the direction of Victoria to Tasmania only. This was subsequently updated to exclude faults on either of the two George Town to Pacific Aluminium 220 kV transmission lines or the George Town to Tamar Valley power station 220 kV transmission line in Jan 2015 and Jun 2016 respectively.
Following a power system event in Tasmania on 29/11/2020, and based on updated information from Market Participants, AEMO has further modified this reclassification.
AEMO will now reclassify the loss of any transmission line in Tasmania and Basslink Interconnector to be a credible contingency event, for Basslink flow in the direction of Victoria to Tasmania only.
As a consequence of this reclassification, AEMO will modify the frequency control ancillary service (FCAS) requirements for Tasmania to all require Contingency FCAS services to be sourced from within Tasmania, for Basslink flow in the direction of Victoria to Tasmania.
The following constraint equations will be updated for the above change at 1300hrs Wednesday 3rd March 2020:
F_T++NIL_ML_L5
F_T++NIL_ML_L6
F_T++NIL_ML_L60
F_T++NIL_TL_L5_DS
F_T++NIL_TL_L6_DS
F_T++NIL_TL_L60_DS
F_T+NIL_ML_L5
F_T+NIL_ML_L6
F_T+NIL_ML_L60
F_T+NIL_TL_L5_DS
F_T+NIL_TL_L6_DS
F_T+NIL_TL_L60_DS
Ben Blake
AEMO Operations
83080RECLASSIFY CONTINGENCY01/03/2021 03:32:32 PM
Reclassification of a Non-Credible Contingency Event: Lismore - Dunoon 9U6 132kV line and Lismore - Dunoon 9U7 132kV line in NSW1 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: NSW1
Lines: Lismore - Dunoon 9U6 132kV and Lismore - Dunoon 9U7 132kV
Duration: 01/03/2021 15:32 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
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: NSW1
Lines: Lismore - Dunoon 9U6 132kV and Lismore - Dunoon 9U7 132kV
Duration: 01/03/2021 15:32 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
83079RECLASSIFY CONTINGENCY01/03/2021 03:29:37 PM
Cancellation of a Non-Credible Contingency Event: Bulli Creek - Dumaresq 8L 330KV line and Bulli Creek - Dumaresq 8M 330KV line in QLD1 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: QLD1
Lines: Bulli Creek - Dumaresq 8L 330KV and Bulli Creek - Dumaresq 8M 330KV
Cancellation time: 01/03/2021 15:29
Constraint set(s) revoked:
I-QNI_ONE_PHASE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NSW1-QLD1
Refer AEMO Electricity Market Notice 83072
Auto-generated on behalf of Manager NEM Real Time Operations
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: QLD1
Lines: Bulli Creek - Dumaresq 8L 330KV and Bulli Creek - Dumaresq 8M 330KV
Cancellation time: 01/03/2021 15:29
Constraint set(s) revoked:
I-QNI_ONE_PHASE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NSW1-QLD1
Refer AEMO Electricity Market Notice 83072
Auto-generated on behalf of Manager NEM Real Time Operations
83078RECLASSIFY CONTINGENCY01/03/2021 03:05:10 PM
Reclassification of a Non-Credible Contingency Event: Lindisfarne - Mornington No.1 TEE line and Lindisfarne - Mornington No.2 TEE 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: Lindisfarne - Mornington No.1 TEE and Lindisfarne - Mornington No.2 TEE
Duration: 01/03/2021 15:05 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
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: Lindisfarne - Mornington No.1 TEE and Lindisfarne - Mornington No.2 TEE
Duration: 01/03/2021 15:05 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
83074GENERAL NOTICE01/03/2021 01:44:32 PM
Reduction in load relief in Tasmanian region - 3rd April 2021
AEMO ELECTRICITY MARKET NOTICE
Further to MN 80127 and 82552, on 3rd March at 1000hrs AEMO will reduce the load relief used to determine FCAS requirements from 0.5% to 0.4% for the Tasmanian region. This will increase the amount of contingency FCAS enabled by AEMO in the Tasmanian region.
This change is a part of AEMO's review of frequency in the NEM. The Tasmanian load relief will be slowly reduced by 0.1% on a four weekly basis. Details were provided to market participants in an industry teleconference on 4th December 2020. For more information refer to: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/ancillary-services/load-relief
There will be no change at this stage to the Mainland load relief.
The next change (to 0.3%) is planned for 31st March 2021.
Ben Blake
AEMO Operations
Further to MN 80127 and 82552, on 3rd March at 1000hrs AEMO will reduce the load relief used to determine FCAS requirements from 0.5% to 0.4% for the Tasmanian region. This will increase the amount of contingency FCAS enabled by AEMO in the Tasmanian region.
This change is a part of AEMO's review of frequency in the NEM. The Tasmanian load relief will be slowly reduced by 0.1% on a four weekly basis. Details were provided to market participants in an industry teleconference on 4th December 2020. For more information refer to: https://www.aemo.com.au/energy-systems/electricity/national-electricity-market-nem/system-operations/ancillary-services/load-relief
There will be no change at this stage to the Mainland load relief.
The next change (to 0.3%) is planned for 31st March 2021.
Ben Blake
AEMO Operations
83072RECLASSIFY CONTINGENCY01/03/2021 12:27:03 PM
Reclassification of a Non-Credible Contingency Event: Bulli Creek - Dumaresq 8L 330KV line and Bulli Creek - Dumaresq 8M 330KV line in QLD1 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: QLD1
Lines: Bulli Creek - Dumaresq 8L 330KV and Bulli Creek - Dumaresq 8M 330KV
Duration: 01/03/2021 12:26 until further notice
Constraint set(s) invoked:
I-QNI_ONE_PHASE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NSW1-QLD1
Auto-generated on behalf of Manager NEM Real Time Operations
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: QLD1
Lines: Bulli Creek - Dumaresq 8L 330KV and Bulli Creek - Dumaresq 8M 330KV
Duration: 01/03/2021 12:26 until further notice
Constraint set(s) invoked:
I-QNI_ONE_PHASE_N-2 Constraint set contains the following interconnector(s) on the left hand side:
NSW1-QLD1
Auto-generated on behalf of Manager NEM Real Time Operations