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67585RECLASSIFY CONTINGENCY05/03/2019 06:14:45 PM
Cancellation of a Non-Credible Contingency Event: Eildon PS - Mt Beauty No.1 220 kV line and Eildon PS - Mt Beauty No.2 220 kV line in VIC1 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: VIC1
Lines: Eildon PS - Mt Beauty No.1 220 kV and Eildon PS - Mt Beauty No.2 220 kV
Cancellation time: 05/03/2019 18:14
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 67571
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: VIC1
Lines: Eildon PS - Mt Beauty No.1 220 kV and Eildon PS - Mt Beauty No.2 220 kV
Cancellation time: 05/03/2019 18:14
Constraint set(s) revoked:
NONE
Refer AEMO Electricity Market Notice 67571
Auto-generated on behalf of Manager NEM Real Time Operations
67584INTER-REGIONAL TRANSFER05/03/2019 06:54:48 PM
Planned outage of Heywood - Mortlake No.2 line Bus 500 kV CB (213) at Heywood in the VIC region, beginning on 06/03/2019
AEMO ELECTRICITY MARKET NOTICE
The Heywood - Mortlake No.2 line Bus 500 kV CB (213) at Heywood in the Victoria region is planned to be out of service from 1330 hrs on 06/03/2019 to 1500 hrs on 06/03/2019.
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-HYCB_210_213
Refer AEMO Network Outage Schedule (NOS) for further details.
Manager NEM Real Time Operations
The Heywood - Mortlake No.2 line Bus 500 kV CB (213) at Heywood in the Victoria region is planned to be out of service from 1330 hrs on 06/03/2019 to 1500 hrs on 06/03/2019.
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-HYCB_210_213
Refer AEMO Network Outage Schedule (NOS) for further details.
Manager NEM Real Time Operations
67583RECLASSIFY CONTINGENCY05/03/2019 05:54:46 PM
Cancellation of a Non-Credible Contingency Event: Dederang - Glenrowan No.1 220 kV line and Dederang - Glenrowan No.3 220 kV line in VIC1 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: VIC1
Lines: Dederang - Glenrowan No.1 220 kV and Dederang - Glenrowan No.3 220 kV
Cancellation time: 05/03/2019 17:54
Constraint set(s) revoked:
V-DDGN_N-2 Constraint set contains the following interconnector(s) on the left hand side:
V-S-MNSP1
V-SA
VIC1-NSW1
Refer AEMO Electricity Market Notice 67570
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: VIC1
Lines: Dederang - Glenrowan No.1 220 kV and Dederang - Glenrowan No.3 220 kV
Cancellation time: 05/03/2019 17:54
Constraint set(s) revoked:
V-DDGN_N-2 Constraint set contains the following interconnector(s) on the left hand side:
V-S-MNSP1
V-SA
VIC1-NSW1
Refer AEMO Electricity Market Notice 67570
Auto-generated on behalf of Manager NEM Real Time Operations
67582MARKET INTERVENTION05/03/2019 05:20:01 PM
Update- AEMO Intervention Event - Intervention price dispatch intervals - 05/03/2019
AEMO ELECTRICITY MARKET NOTICE.
Update- AEMO Intervention Event - Intervention price dispatch intervals - 05/03/2019
Refer AEMO Electricity Market Notice no. 67575
An AEMO Intervention Event occurred when AEMO issued a direction to maintain the power system in a secure operating state.
The AEMO Intervention Event commenced in the 1405 hrs dispatch interval and is forecast to apply until 1500 hrs 06/03/2019.
AEMO declares all dispatch intervals during the AEMO Intervention Event to be intervention price dispatch intervals.
The direction is expected to affect dispatch quantities for intervention pricing purposes from the 0005 hrs dispatch interval on 06/03/2019.
Manager NEM Real Time Operations
Update- AEMO Intervention Event - Intervention price dispatch intervals - 05/03/2019
Refer AEMO Electricity Market Notice no. 67575
An AEMO Intervention Event occurred when AEMO issued a direction to maintain the power system in a secure operating state.
The AEMO Intervention Event commenced in the 1405 hrs dispatch interval and is forecast to apply until 1500 hrs 06/03/2019.
AEMO declares all dispatch intervals during the AEMO Intervention Event to be intervention price dispatch intervals.
The direction is expected to affect dispatch quantities for intervention pricing purposes from the 0005 hrs dispatch interval on 06/03/2019.
Manager NEM Real Time Operations
67579MARKET SYSTEMS05/03/2019 04:52:17 PM
CHG0053364: STTM Pre-Production database refresh
Change Number: CHG0053364
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: STTM - Scheduling & Dispatch
Change Title: STTM Pre-Production database refresh
Change Start Date & Time: 08/03/2019 09:00:00 AEST
Change End Date & Time: 08/03/2019 14:00:00 AEST
Outage Start Date & Time: 08/03/2019 09:00:00 AEST
Outage End Date & Time: 08/03/2019 14:00:00 AEST
Change Description:
Gas STTM Pre-Production will have an outage due to database refresh
Environment: Pre-Production
Participant Impact and Requirements:
Gas STTM Pre-Production will be unavailable for the duration of the outage.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: STTM - Scheduling & Dispatch
Change Title: STTM Pre-Production database refresh
Change Start Date & Time: 08/03/2019 09:00:00 AEST
Change End Date & Time: 08/03/2019 14:00:00 AEST
Outage Start Date & Time: 08/03/2019 09:00:00 AEST
Outage End Date & Time: 08/03/2019 14:00:00 AEST
Change Description:
Gas STTM Pre-Production will have an outage due to database refresh
Environment: Pre-Production
Participant Impact and Requirements:
Gas STTM Pre-Production will be unavailable for the duration of the outage.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
67578INTER-REGIONAL TRANSFER05/03/2019 03:52:05 PM
Cancellation - Short notice outage of Heywood (213) 500kV Circuit Breaker in the VIC region beginning at 1700 hrs 05/03/2019.
AEMO ELECTRICITY MARKET NOTICE
Cancellation - Short notice outage of Heywood (213) 500kV Circuit Breaker in the VIC region beginning at 1700 hrs 05/03/2019.
Refer AEMO Electricity Notice 67576
The short notice outage of the Heywood (213) 500kV Circuit Breaker in the VIC region scheduled for 1700 hrs on 05/03/2019 has been cancelled.
Manager NEM Real Time Operations
Cancellation - Short notice outage of Heywood (213) 500kV Circuit Breaker in the VIC region beginning at 1700 hrs 05/03/2019.
Refer AEMO Electricity Notice 67576
The short notice outage of the Heywood (213) 500kV Circuit Breaker in the VIC region scheduled for 1700 hrs on 05/03/2019 has been cancelled.
Manager NEM Real Time Operations
67577POWER SYSTEM EVENTS05/03/2019 03:17:21 PM
Update - Non-credible contingency event - SA region - 04/03/2019
AEMO ELECTRICITY MARKET NOTICE.
Update - Non-credible contingency event - SA region - 04/03/2019
Refer AEMO Electricity Market Notice 67556
At 0459 hrs the Mintaro - Waterloo 132 kV Line tripped and the Mintaro - Clare Nth 132 kV Line opened at Mintaro end 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 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 - SA region - 04/03/2019
Refer AEMO Electricity Market Notice 67556
At 0459 hrs the Mintaro - Waterloo 132 kV Line tripped and the Mintaro - Clare Nth 132 kV Line opened at Mintaro end 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 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
67576INTER-REGIONAL TRANSFER05/03/2019 03:20:45 PM
Short notice outage of Heywood 213 500kV Circuit Breaker in the VIC region beginning at 1700 hrs 05/03/2019.
AEMO ELECTRICITY MARKET NOTICE
Short notice outage of Heywood 213 500kV Circuit Breaker in the VIC region beginning at 1700 hrs 05/03/2019.
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:
o When power transfer is from SA to Victoria, contingency lower FCAS will be sourced from SA.
o 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
S-X_BC_CP
V-HYCB_210_213
Refer AEMO Network Outage Schedule (NOS) for further details.
Manager NEM Real Time Operations
Short notice outage of Heywood 213 500kV Circuit Breaker in the VIC region beginning at 1700 hrs 05/03/2019.
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:
o When power transfer is from SA to Victoria, contingency lower FCAS will be sourced from SA.
o 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
S-X_BC_CP
V-HYCB_210_213
Refer AEMO Network Outage Schedule (NOS) for further details.
Manager NEM Real Time Operations
67575MARKET INTERVENTION05/03/2019 02:10:15 PM
AEMO Intervention Event - Intervention price dispatch intervals - 05/03/2019
AEMO ELECTRICITY MARKET NOTICE.
AEMO Intervention Event - Intervention price dispatch intervals - 05/03/2019
Refer AEMO Electricity Market Notice no. 67574
An AEMO Intervention Event occurred when AEMO issued a direction to maintain the power system in a secure operating state.
The AEMO Intervention Event commenced in the 1405 hrs dispatch interval and is forecast to apply until 0600 hrs 06/03/2019.
AEMO declares all dispatch intervals during the AEMO Intervention Event to be intervention price dispatch intervals.
The direction is expected to affect dispatch quantities for intervention pricing purposes from the 0005 hrs dispatch interval on 06/03/2019.
Manager NEM Real Time Operations
AEMO Intervention Event - Intervention price dispatch intervals - 05/03/2019
Refer AEMO Electricity Market Notice no. 67574
An AEMO Intervention Event occurred when AEMO issued a direction to maintain the power system in a secure operating state.
The AEMO Intervention Event commenced in the 1405 hrs dispatch interval and is forecast to apply until 0600 hrs 06/03/2019.
AEMO declares all dispatch intervals during the AEMO Intervention Event to be intervention price dispatch intervals.
The direction is expected to affect dispatch quantities for intervention pricing purposes from the 0005 hrs dispatch interval on 06/03/2019.
Manager NEM Real Time Operations