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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
67574MARKET INTERVENTION05/03/2019 02:09:52 PM
Direction - South Australia region 05/03/2019
AEMO ELECTRICITY MARKET NOTICE.
Direction - South Australia region 05/03/2019
In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region.
The direction was necessary to maintain the power system in a secure operating state.
AEMO may issue or revoke additional directions in order to meet the current requirement, unless sufficient market response is provided.
A further market notice will be issued when all directions related to this requirement have been cancelled.
For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a).
Manager NEM Real Time Operations
Direction - South Australia region 05/03/2019
In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region.
The direction was necessary to maintain the power system in a secure operating state.
AEMO may issue or revoke additional directions in order to meet the current requirement, unless sufficient market response is provided.
A further market notice will be issued when all directions related to this requirement have been cancelled.
For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a).
Manager NEM Real Time Operations
67571RECLASSIFY CONTINGENCY05/03/2019 01:11:54 PM
Reclassification 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
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: VIC1
Lines: Eildon PS - Mt Beauty No.1 220 kV and Eildon PS - Mt Beauty No.2 220 kV
Duration: 05/03/2019 13:11 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: VIC1
Lines: Eildon PS - Mt Beauty No.1 220 kV and Eildon PS - Mt Beauty No.2 220 kV
Duration: 05/03/2019 13:11 until further notice
Constraint set(s) invoked:
NONE
Auto-generated on behalf of Manager NEM Real Time Operations
67570RECLASSIFY CONTINGENCY05/03/2019 12:53:05 PM
Reclassification 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
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: VIC1
Lines: Dederang - Glenrowan No.1 220 kV and Dederang - Glenrowan No.3 220 kV
Duration: 05/03/2019 12:53 until further notice
Constraint set(s) invoked:
V-DDGN_N-2 Constraint set contains the following interconnector(s) on the left hand side:
V-S-MNSP1
V-SA
VIC1-NSW1
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: VIC1
Lines: Dederang - Glenrowan No.1 220 kV and Dederang - Glenrowan No.3 220 kV
Duration: 05/03/2019 12:53 until further notice
Constraint set(s) invoked:
V-DDGN_N-2 Constraint set contains the following interconnector(s) on the left hand side:
V-S-MNSP1
V-SA
VIC1-NSW1
Auto-generated on behalf of Manager NEM Real Time Operations
67569RECLASSIFY CONTINGENCY05/03/2019 12:25:10 PM
Update - Reclassification of a Non-Credible Contingency Event: Hazelwood Terminal Station - South Morang No. 1 and No. 2 500 kV lines in VIC due to bushfires.
AEMO ELECTRICITY MARKET NOTICE
Reclassification of a non-credible contingency event as a credible contingency event due to bushfires.
Refer to AEMO Electricity Market Notice 67547
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: VIC1
Lines: Hazelwood Terminal Station - South Morang No. 1 and No. 2 500 kV Lines
Duration: 03/03/2019 12:05 until further notice
Constraint set(s) invoked: V-HWSM_N-2 invoked from 1225 hrs 05/03/2019.
Manager NEM Real Time Operations
Reclassification of a non-credible contingency event as a credible contingency event due to bushfires.
Refer to AEMO Electricity Market Notice 67547
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: VIC1
Lines: Hazelwood Terminal Station - South Morang No. 1 and No. 2 500 kV Lines
Duration: 03/03/2019 12:05 until further notice
Constraint set(s) invoked: V-HWSM_N-2 invoked from 1225 hrs 05/03/2019.
Manager NEM Real Time Operations
67568INTER-REGIONAL TRANSFER05/03/2019 11:01:41 AM
Update - Constraint Automation to Manage Power System Security in NSW Region -05/03/2019
AEMO ELECTRICITY MARKET NOTICE
Update - Constraint Automation to Manage Power System Security in NSW Region -05/03/2019
In order to maintain the power system in a secure operating state and manage CA violations in the NSW Region, AEMO has invoked an automated constraint set CA_SPS_4B902E2A from 0845 hrs to 1100 hrs.
This Constraint Set contains equations with the following interconnector on the LHS;
N-Q-MNSP1
Manager NEM Real Time Operations
Update - Constraint Automation to Manage Power System Security in NSW Region -05/03/2019
In order to maintain the power system in a secure operating state and manage CA violations in the NSW Region, AEMO has invoked an automated constraint set CA_SPS_4B902E2A from 0845 hrs to 1100 hrs.
This Constraint Set contains equations with the following interconnector on the LHS;
N-Q-MNSP1
Manager NEM Real Time Operations