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90262MARKET INTERVENTION07/09/2021 02:47:10 PM
Possible intervention to manage power system security in South Australia (SA) Region
AEMO ELECTRICITY MARKET NOTICE
Possible intervention to manage power system security in South Australia (SA) Region
The synchronous generating units currently expected to be synchronised in SA from 0830 hrs 08/09/2021 to 1730 hrs 08/09/2021 will be inadequate to maintain sufficient system strength in SA and hence a secure operating state.
AEMO estimates that, in the absence of sufficient market response by 1800 hrs 07/09/2021, AEMO may need to intervene by issuing a direction requiring one or more SA synchronous generating unit(s) to operate or remain synchronised to maintain power system security in SA.
Manager NEM Real Time Operation
Possible intervention to manage power system security in South Australia (SA) Region
The synchronous generating units currently expected to be synchronised in SA from 0830 hrs 08/09/2021 to 1730 hrs 08/09/2021 will be inadequate to maintain sufficient system strength in SA and hence a secure operating state.
AEMO estimates that, in the absence of sufficient market response by 1800 hrs 07/09/2021, AEMO may need to intervene by issuing a direction requiring one or more SA synchronous generating unit(s) to operate or remain synchronised to maintain power system security in SA.
Manager NEM Real Time Operation
90261RESERVE NOTICE07/09/2021 01:56:34 PM
RESERVE NOTICE MT PASA PUBLICATION 07 September 2021
The MTPASA result published on 07 September 2021 identifies no Low Reserve Conditions.
Please note that MTPASA informs the market of potential reliability issues to allow the market to respond in the first instance, potentially avoiding the need for any market intervention or direction from AEMO.
For further information, please refer to:
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data/Market-Management-System-MMS/Projected-Assessment-of-System-Adequacy
This notice supersedes Market Notice 90075 published on 31 August 2021.
Background
As part of a broader process of implementing the reliability standard, AEMO runs the Medium Term Projected Assessment of System Adequacy (MTPASA) process weekly to forecast expected unserved energy levels over a two year period. If the expected annual unserved energy exceeds the maximum level specified by the Reliability Standard, a Low Reserve Condition is identified.
For more information about how AEMO implements the reliability standard, please view the Reliability Standard Implementation Guidelines (RSIG) available on AEMO's website at
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Planning-and-forecasting/Reliability-Standard-Implementation-Guidelines
Forecasting
AEMO
Please note that MTPASA informs the market of potential reliability issues to allow the market to respond in the first instance, potentially avoiding the need for any market intervention or direction from AEMO.
For further information, please refer to:
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Data/Market-Management-System-MMS/Projected-Assessment-of-System-Adequacy
This notice supersedes Market Notice 90075 published on 31 August 2021.
Background
As part of a broader process of implementing the reliability standard, AEMO runs the Medium Term Projected Assessment of System Adequacy (MTPASA) process weekly to forecast expected unserved energy levels over a two year period. If the expected annual unserved energy exceeds the maximum level specified by the Reliability Standard, a Low Reserve Condition is identified.
For more information about how AEMO implements the reliability standard, please view the Reliability Standard Implementation Guidelines (RSIG) available on AEMO's website at
https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Planning-and-forecasting/Reliability-Standard-Implementation-Guidelines
Forecasting
AEMO
90260GENERAL NOTICE07/09/2021 10:33:59 AM
Update - Planned outage of Heywood No.1 500 kV busbar and Heywood - Tarrone 500 kV line in the Victoria region on 07, 08 and 10 September 2021
AEMO ELECTRICITY MARKET NOTICE
Refer to MN 90257.
The Heywood No.1 500 kV busbar was previously scheduled to start at 0900 hrs on 08/09/2021. This outage is now scheduled to start at 0700 hrs.
The Heywood No.1 500 kV busbar and Heywood - Tarrone 500 kV line in the Victoria (VIC) region are planned to be out of service from:
- 0900 hrs to 2000 hrs on 07/09/2021;
- 0700 hrs to 2000 hrs on 08/09/2021; and
- 1600 hrs to 1800 hrs on 10/09/2021.
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 VIC, contingency lower FCAS will be sourced from SA.
- When power transfer is from VIC 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 on VIC - SA 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:
V-HYTR
F-I-HYSE
S-X_BC_CP
V-HYTX_M12
V-HY_500BUS
I-VS_050
Refer AEMO Network Outage Schedule (NOS) for further details.
AEMO Operations
Refer to MN 90257.
The Heywood No.1 500 kV busbar was previously scheduled to start at 0900 hrs on 08/09/2021. This outage is now scheduled to start at 0700 hrs.
The Heywood No.1 500 kV busbar and Heywood - Tarrone 500 kV line in the Victoria (VIC) region are planned to be out of service from:
- 0900 hrs to 2000 hrs on 07/09/2021;
- 0700 hrs to 2000 hrs on 08/09/2021; and
- 1600 hrs to 1800 hrs on 10/09/2021.
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 VIC, contingency lower FCAS will be sourced from SA.
- When power transfer is from VIC 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 on VIC - SA 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:
V-HYTR
F-I-HYSE
S-X_BC_CP
V-HYTX_M12
V-HY_500BUS
I-VS_050
Refer AEMO Network Outage Schedule (NOS) for further details.
AEMO Operations
90259NON-CONFORMANCE07/09/2021 05:15:18 AM
NON-CONFORMANCE Region SA1 Tuesday, 7 September 2021
AEMO ELECTRICITY MARKET NOTICE
NON-CONFORMANCE SA1 Region Tuesday, 7 September 2021
AEMO declared a schedule generating unit non-conforming
Unit: PPCCGT
Duration: 07/09/2021 05:00 to 07/09/2021 05:15
Amount: 70 MW
Constraint: NC-S_PPCCGT
Auto-generated on behalf of Manager NEM Real Time Operations
NON-CONFORMANCE SA1 Region Tuesday, 7 September 2021
AEMO declared a schedule generating unit non-conforming
Unit: PPCCGT
Duration: 07/09/2021 05:00 to 07/09/2021 05:15
Amount: 70 MW
Constraint: NC-S_PPCCGT
Auto-generated on behalf of Manager NEM Real Time Operations
90258INTER-REGIONAL TRANSFER07/09/2021 01:03:33 AM
Inter-regional transfer limit variation: Hazelwood - South Morang No 1 500 kV Line (VIC) - Voltage Control
AEMO ELECTRICITY MARKET NOTICE
The Hazelwood - South Morang No 1 500 kV Line has been de-energised to manage voltages in the Victoria region.
The following constraint set was invoked at 0100 hrs 07/09/2021.
V-HWSM
The constraint set contains equations with the following interconnectors on the LHS.
T-V-MNSP
V-S-MNSP1
V-SA
VIC1-NSW1
Refer to AEMO Network Outage Scheduler (NOS) for return to service details
Manager NEM Real Time Operations
The Hazelwood - South Morang No 1 500 kV Line has been de-energised to manage voltages in the Victoria region.
The following constraint set was invoked at 0100 hrs 07/09/2021.
V-HWSM
The constraint set contains equations with the following interconnectors on the LHS.
T-V-MNSP
V-S-MNSP1
V-SA
VIC1-NSW1
Refer to AEMO Network Outage Scheduler (NOS) for return to service details
Manager NEM Real Time Operations
90257GENERAL NOTICE06/09/2021 12:48:32 PM
Update - Planned outage of Heywood No.1 500 kV busbar and Heywood - Tarrone 500 kV line in the Victoria region on 07, 08 and 10 September 2021
AEMO ELECTRICITY MARKET NOTICE
Refer to MN 90171.
The Heywood No.1 500 kV busbar and Heywood - Tarrone 500 kV line in the Victoria (VIC) region are now planned to be out of service from:
0900 hrs to 2000 hrs on 07/09/2021;
0900 hrs to 2000 hrs on 08/09/2021; and
1600 hrs to 1800 hrs on 10/09/2021.
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 VIC, contingency lower FCAS will be sourced from SA.
- When power transfer is from VIC 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 on VIC - SA 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:
V-HYTR
F-I-HYSE
S-X_BC_CP
V-HYTX_M12
V-HY_500BUS
I-VS_050
Refer AEMO Network Outage Schedule (NOS) for further details.
AEMO Operations
Refer to MN 90171.
The Heywood No.1 500 kV busbar and Heywood - Tarrone 500 kV line in the Victoria (VIC) region are now planned to be out of service from:
0900 hrs to 2000 hrs on 07/09/2021;
0900 hrs to 2000 hrs on 08/09/2021; and
1600 hrs to 1800 hrs on 10/09/2021.
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 VIC, contingency lower FCAS will be sourced from SA.
- When power transfer is from VIC 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 on VIC - SA 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:
V-HYTR
F-I-HYSE
S-X_BC_CP
V-HYTX_M12
V-HY_500BUS
I-VS_050
Refer AEMO Network Outage Schedule (NOS) for further details.
AEMO Operations
90256MARKET SYSTEMS06/09/2021 01:33:44 PM
Change Number: CHG0069771
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MSATS - Consumer Administration and Transfer Solution(CATS)
Change Title: 5MS - Market Trials Defect Release (Pre-Prod)
Change Start Date & Time: 07/09/2021 18:00:00 AEST
Change End Date & Time: 08/09/2021 16:00:00 AEST
Outage Start Date & Time: 07/09/2021 18:00:00 AEST
Outage End Date & Time: 07/09/2021 20:00:00 AEST
Change Description:
This outage is to allow the deployment of MSATS and eEMDM Pre-Production as part of 5MS Market Trials . MSATS will be unavailable during this outage period.
Environment: Pre-Production
Participant Impact and Requirements:
There will be no access to the Pre-Production MSATS system for the duration of the outage. Please access outside these hours.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
CHG0069771:MSATS - Consumer Administration and Transfer Solution(CATS)
Change Number: CHG0069771
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MSATS - Consumer Administration and Transfer Solution(CATS)
Change Title: 5MS - Market Trials Defect Release (Pre-Prod)
Change Start Date & Time: 07/09/2021 18:00:00 AEST
Change End Date & Time: 08/09/2021 16:00:00 AEST
Outage Start Date & Time: 07/09/2021 18:00:00 AEST
Outage End Date & Time: 07/09/2021 20:00:00 AEST
Change Description:
This outage is to allow the deployment of MSATS and eEMDM Pre-Production as part of 5MS Market Trials . MSATS will be unavailable during this outage period.
Environment: Pre-Production
Participant Impact and Requirements:
There will be no access to the Pre-Production MSATS system for the duration of the outage. Please access outside these hours.
Support Information:
Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
90255MARKET INTERVENTION06/09/2021 01:56:36 PM
Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 06/09/2021
AEMO ELECTRICITY MARKET NOTICE
Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 06/09/2021
Refer Market Notice 90253
The AEMO Intervention Event and all associated directions are cancelled from 1400 hrs 06/09/2021
Manager NEM Real Time Operations
Cancellation - AEMO Intervention Event - Intervention dispatch intervals - Direction SA region - 06/09/2021
Refer Market Notice 90253
The AEMO Intervention Event and all associated directions are cancelled from 1400 hrs 06/09/2021
Manager NEM Real Time Operations
90253MARKET INTERVENTION06/09/2021 05:26:04 AM
Direction - SA Region - 06/09/2021
AEMO ELECTRICITY MARKET NOTICE
Direction - SA Region - 06/09/2021
In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a).
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.
The issue of the direction commences an AEMO intervention event. AEMO declares all dispatch intervals during the event to be intervention dispatch intervals, commencing from the interval ending 0535 hrs on 06/09/2021.
Intervention pricing does not apply to this AEMO intervention event.
Manager NEM Real Time Operations
Direction - SA Region - 06/09/2021
In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a).
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.
The issue of the direction commences an AEMO intervention event. AEMO declares all dispatch intervals during the event to be intervention dispatch intervals, commencing from the interval ending 0535 hrs on 06/09/2021.
Intervention pricing does not apply to this AEMO intervention event.
Manager NEM Real Time Operations