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67652RECLASSIFY CONTINGENCY07/03/2019 02:43:20 PM
Reclassification of a Non-Credible Contingency Event: Goonyella - Nth Goonyella T- Stoney Creek 7122 132 kV line and Goonyella - Newlands No. 7155 132 kV 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: Goonyella - Nth Goonyella T- Stoney Creek 7122 132 kV and Goonyella - Newlands No. 7155 132 kV
Duration: 07/03/2019 14:43 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: Goonyella - Nth Goonyella T- Stoney Creek 7122 132 kV and Goonyella - Newlands No. 7155 132 kV
Duration: 07/03/2019 14:43 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
67651RECLASSIFY CONTINGENCY07/03/2019 02:43:20 PM
Reclassification of a Non-Credible Contingency Event: Clare South- King Creek 7128/2 132kV line and Collinsville Nth - Clare Sth Tee King Creek 7128 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: Clare South- King Creek 7128/2 132kV and Collinsville Nth - Clare Sth Tee King Creek 7128 132kV
Duration: 07/03/2019 14:43 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: Clare South- King Creek 7128/2 132kV and Collinsville Nth - Clare Sth Tee King Creek 7128 132kV
Duration: 07/03/2019 14:43 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
67650RECLASSIFY CONTINGENCY07/03/2019 01:54:40 PM
Cancellation of a Non-Credible Contingency Event: Goonyella - Nth Goonyella T- Stoney Creek 7122 132 kV line and Goonyella - Newlands No. 7155 132 kV 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: Goonyella - Nth Goonyella T- Stoney Creek 7122 132 kV and Goonyella - Newlands No. 7155 132 kV
Cancellation time: 07/03/2019 13:54
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 67647
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: Goonyella - Nth Goonyella T- Stoney Creek 7122 132 kV and Goonyella - Newlands No. 7155 132 kV
Cancellation time: 07/03/2019 13:54
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 67647
Auto-generated on behalf of Manager NEM Real Time Operations
67649RECLASSIFY CONTINGENCY07/03/2019 01:36:05 PM
Reclassification of a Non-Credible Contingency Event: Tarong - Chinchilla No.7168 132 kV line and Tarong - Chinchilla No.7183 132 kV 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: Tarong - Chinchilla No.7168 132 kV and Tarong - Chinchilla No.7183 132 kV
Duration: 07/03/2019 13:36 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: Tarong - Chinchilla No.7168 132 kV and Tarong - Chinchilla No.7183 132 kV
Duration: 07/03/2019 13:36 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
67648RECLASSIFY CONTINGENCY07/03/2019 01:00:20 PM
Reclassification of a Non-Credible Contingency Event: Collinsville - Stoney Creek No.7306 132 kV line and Collinsville - Newlands No.7121 132 kV 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: Collinsville - Stoney Creek No.7306 132 kV and Collinsville - Newlands No.7121 132 kV
Duration: 07/03/2019 13:00 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: Collinsville - Stoney Creek No.7306 132 kV and Collinsville - Newlands No.7121 132 kV
Duration: 07/03/2019 13:00 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
67647RECLASSIFY CONTINGENCY07/03/2019 12:50:30 PM
Reclassification of a Non-Credible Contingency Event: Goonyella - Nth Goonyella T- Stoney Creek 7122 132 kV line and Goonyella - Newlands No. 7155 132 kV 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: Goonyella - Nth Goonyella T- Stoney Creek 7122 132 kV and Goonyella - Newlands No. 7155 132 kV
Duration: 07/03/2019 12:50 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: Goonyella - Nth Goonyella T- Stoney Creek 7122 132 kV and Goonyella - Newlands No. 7155 132 kV
Duration: 07/03/2019 12:50 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
67646RECLASSIFY CONTINGENCY07/03/2019 12:27:40 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: 07/03/2019 12:27 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: 07/03/2019 12:27 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
67645GENERAL NOTICE07/03/2019 07:57:44 AM
Update Planned outage of Heywood 500 kV Bus at Heywood in the VIC region, on 07/03/2019
AEMO ELECTRICITY MARKET NOTICE
Refer AEMO Electricity Market Notice 67606
The Heywood No. 2 500 kV Bus, Heywood M2 transformer and Heywood 500 kV CB (213) at Heywood in the Victoria region are planned to be out of service from 0900 hrs on 07/03/2019 to 1100 hrs on 07/03/2019.
A credible contingency event during this planned outage could cause synchronous separation of the South Australia (SA) region from the rest of the NEM. If separation occurs, load may be interrupted due to the operation of the Automatic Under Frequency Load Shedding (AUFLS) scheme in SA.
The credible separation contingency is managed as follows:
When power transfer is from SA to Victoria, contingency lower FCAS will be sourced from SA.
When power transfer is from Victoria to SA, due to the 47-52Hz Island separation frequency band advised by the SA jurisdiction, contingency raise FCAS is not sourced in SA and the AUFLS scheme may respond to low frequency events.
Forecast capacity reserves in the SA region are currently sufficient to meet electricity demand during the planned outage.
The following constraint sets have been invoked for this outage:
F-I-HYSE
I-VS_050
S-X_BC_CP
V-HYTX_M12
V-HY_500BUS
Refer AEMO Network Outage Schedule (NOS) for further details.
Manager NEM Real Time Operations
Refer AEMO Electricity Market Notice 67606
The Heywood No. 2 500 kV Bus, Heywood M2 transformer and Heywood 500 kV CB (213) at Heywood in the Victoria region are planned to be out of service from 0900 hrs on 07/03/2019 to 1100 hrs on 07/03/2019.
A credible contingency event during this planned outage could cause synchronous separation of the South Australia (SA) region from the rest of the NEM. If separation occurs, load may be interrupted due to the operation of the Automatic Under Frequency Load Shedding (AUFLS) scheme in SA.
The credible separation contingency is managed as follows:
When power transfer is from SA to Victoria, contingency lower FCAS will be sourced from SA.
When power transfer is from Victoria to SA, due to the 47-52Hz Island separation frequency band advised by the SA jurisdiction, contingency raise FCAS is not sourced in SA and the AUFLS scheme may respond to low frequency events.
Forecast capacity reserves in the SA region are currently sufficient to meet electricity demand during the planned outage.
The following constraint sets have been invoked for this outage:
F-I-HYSE
I-VS_050
S-X_BC_CP
V-HYTX_M12
V-HY_500BUS
Refer AEMO Network Outage Schedule (NOS) for further details.
Manager NEM Real Time Operations
67644GENERAL NOTICE07/03/2019 08:59:12 AM
Planned outage of Moorabool -Tarrone 500 kV line in the Victoria region on 08/03/2019
AEMO ELECTRICITY MARKET NOTICE
The Moorabool -Tarrone 500 kV line in the Victoria (VIC) region is now planned to be out of service from 0600 hrs to 1700 hrs on 08/03/2019.
A credible contingency event during this planned outage could cause synchronous separation of the South Australia (SA) region from the rest of the NEM. If separation occurs, load may be interrupted due to the operation of the Automatic Under Frequency Load Shedding (AUFLS) scheme in SA.
The credible separation contingency is managed as follows:
- When power transfer is from SA to Victoria, contingency lower FCAS will be sourced from SA.
- When power transfer is from Victoria to SA, due to the 47-52Hz island separation frequency band advised by the SA jurisdiction, contingency raise FCAS is not sourced in SA and the AUFLS scheme may respond to low frequency events.
- Power transfer will be restricted sufficiently low on Victoria - South Australia interconnector (Heywood interconnector) to manage system security following the loss of the next contingency.
Forecast capacity reserves in the SA region are currently sufficient to meet electricity demand during the planned outage.
The following constraint sets have been invoked for this outage:
F-V-MLTR
I-VS_050
S-X_BC_CP
V-MACARTHUR_ZERO
V-MLTR
Refer AEMO Network Outage Schedule (NOS) for further details.
Danushka Sooriyadasa
AEMO Operations
The Moorabool -Tarrone 500 kV line in the Victoria (VIC) region is now planned to be out of service from 0600 hrs to 1700 hrs on 08/03/2019.
A credible contingency event during this planned outage could cause synchronous separation of the South Australia (SA) region from the rest of the NEM. If separation occurs, load may be interrupted due to the operation of the Automatic Under Frequency Load Shedding (AUFLS) scheme in SA.
The credible separation contingency is managed as follows:
- When power transfer is from SA to Victoria, contingency lower FCAS will be sourced from SA.
- When power transfer is from Victoria to SA, due to the 47-52Hz island separation frequency band advised by the SA jurisdiction, contingency raise FCAS is not sourced in SA and the AUFLS scheme may respond to low frequency events.
- Power transfer will be restricted sufficiently low on Victoria - South Australia interconnector (Heywood interconnector) to manage system security following the loss of the next contingency.
Forecast capacity reserves in the SA region are currently sufficient to meet electricity demand during the planned outage.
The following constraint sets have been invoked for this outage:
F-V-MLTR
I-VS_050
S-X_BC_CP
V-MACARTHUR_ZERO
V-MLTR
Refer AEMO Network Outage Schedule (NOS) for further details.
Danushka Sooriyadasa
AEMO Operations