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71130GENERAL NOTICE13/11/2019 12:08:53 AM
Non-credible contingency event more likely to occur due to existence of abnormal conditions - NSW region.
AEMO ELECTRICITY MARKET NOTICE.
Refer to AEMO ELECTRICITY MARKET NOTICE 71090
AEMO has identified that a non-credible contingency event is more likely to occur in the NSW region because of the existence of abnormal conditions, namely multiple large bushfires burning across NSW.
At the time of this notice there are two reclassifications in place, however the criteria for reclassification of any other non-credible contingency event have not been met, and there is a possibility of bushfires impacting multiple transmission elements in NSW.
Conditions can change rapidly and potentially impacted plant may change. Further notices will only be published to advise of any reclassification, or when the abnormal conditions have ceased to impact the likelihood of a non-credible event occurring.
Manager NEM Real Time Operations
Refer to AEMO ELECTRICITY MARKET NOTICE 71090
AEMO has identified that a non-credible contingency event is more likely to occur in the NSW region because of the existence of abnormal conditions, namely multiple large bushfires burning across NSW.
At the time of this notice there are two reclassifications in place, however the criteria for reclassification of any other non-credible contingency event have not been met, and there is a possibility of bushfires impacting multiple transmission elements in NSW.
Conditions can change rapidly and potentially impacted plant may change. Further notices will only be published to advise of any reclassification, or when the abnormal conditions have ceased to impact the likelihood of a non-credible event occurring.
Manager NEM Real Time Operations
71090GENERAL NOTICE11/11/2019 05:14:28 PM
Non-credible contingency event more likely to occur due to existence of abnormal conditions NSW region. Tuesday 12th November 2019.
AEMO ELECTRICITY MARKET NOTICE.
AEMO has identified that a non-credible contingency event is more likely to occur in the NSW region because of the existence of abnormal conditions, namely severe, extreme and catastrophic bushfire conditions forecast for Tuesday 12th November 2019.
As at the time of this notice the criteria for reclassification of any non-credible contingency event have not been met, however there is a possibility of bushfires impacting multiple transmission elements in NSW on Tuesday 12th November 2019.
Conditions can change rapidly and potentially impacted plant may change. Further notices will only be published to advise of any reclassification, or when the abnormal conditions have ceased to impact the likelihood of a non-credible event occurring.
Manager NEM Real Time Operations
AEMO has identified that a non-credible contingency event is more likely to occur in the NSW region because of the existence of abnormal conditions, namely severe, extreme and catastrophic bushfire conditions forecast for Tuesday 12th November 2019.
As at the time of this notice the criteria for reclassification of any non-credible contingency event have not been met, however there is a possibility of bushfires impacting multiple transmission elements in NSW on Tuesday 12th November 2019.
Conditions can change rapidly and potentially impacted plant may change. Further notices will only be published to advise of any reclassification, or when the abnormal conditions have ceased to impact the likelihood of a non-credible event occurring.
Manager NEM Real Time Operations
71084GENERAL NOTICE11/11/2019 03:27:00 PM
Cancellation: Planned outage of Moorabool - Mortlake PS 500 kV line in the Victoria region on 12 November 2019
AEMO ELECTRICITY MARKET NOTICE
Cancellation: The planned outage of the Moorabool - Mortlake PS 500 kV line in the Victoria (VIC) region on 12/11/2019 has been cancelled.
Refer to AEMO Electricity Market Notices 71003.
The Moorabool - Mortlake PS 500 kV line outage was planned to be out of service from 0530 - 1700 hrs.
All constraint sets associated with this outage have been revoked.
Margarete Ting
AEMO Operations
Cancellation: The planned outage of the Moorabool - Mortlake PS 500 kV line in the Victoria (VIC) region on 12/11/2019 has been cancelled.
Refer to AEMO Electricity Market Notices 71003.
The Moorabool - Mortlake PS 500 kV line outage was planned to be out of service from 0530 - 1700 hrs.
All constraint sets associated with this outage have been revoked.
Margarete Ting
AEMO Operations
71003GENERAL NOTICE07/11/2019 09:33:45 AM
Daily planned outage of Moorabool - Mortlake PS 500 kV line in the Victoria region on 11 and 12 November 2019
AEMO ELECTRICITY MARKET NOTICE
The Moorabool - Mortlake PS 500 kV line in the Victoria (VIC) region is planned to be out of service from 0530 hrs to 1700 hrs on the following dates:
-11/11/2019
-12/11/2019
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 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:
I-VS_050
S-X_BC_CP
Refer AEMO Network Outage Schedule (NOS) for further details.
Margarete Ting
AEMO Operations
The Moorabool - Mortlake PS 500 kV line in the Victoria (VIC) region is planned to be out of service from 0530 hrs to 1700 hrs on the following dates:
-11/11/2019
-12/11/2019
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 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:
I-VS_050
S-X_BC_CP
Refer AEMO Network Outage Schedule (NOS) for further details.
Margarete Ting
AEMO Operations
70930GENERAL NOTICE05/11/2019 09:13:56 AM
Reduction in load relief for mainland regions - 5 November 2019
AEMO ELECTRICITY MARKET NOTICE
Refer to market notices 69914, 70206, 70441 and 70645.
On 7th November at 1100hrs AEMO will reduce the load relief used in the FCAS constraint equations from 1.1% to 1.0% for all mainland regions. This will increase the amount of contingency FCAS enabled by AEMO.
This change is a part of AEMO's review of frequency in the NEM. The mainland load relief will be slowly reduced. Details were provided to market participants in an industry teleconference on 16 August 2019. For more information refer to: https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Security-and-reliability/Ancillary-services/Load-relief
AEMO will publish a report by the end of next week with further analysis of load relief during recent generator trips, information on the market impact of these changes and of any further changes to mainland load relief.
There will be no change at this stage to the Tasmanian load relief.
James Guest
AEMO Operations
Refer to market notices 69914, 70206, 70441 and 70645.
On 7th November at 1100hrs AEMO will reduce the load relief used in the FCAS constraint equations from 1.1% to 1.0% for all mainland regions. This will increase the amount of contingency FCAS enabled by AEMO.
This change is a part of AEMO's review of frequency in the NEM. The mainland load relief will be slowly reduced. Details were provided to market participants in an industry teleconference on 16 August 2019. For more information refer to: https://www.aemo.com.au/Electricity/National-Electricity-Market-NEM/Security-and-reliability/Ancillary-services/Load-relief
AEMO will publish a report by the end of next week with further analysis of load relief during recent generator trips, information on the market impact of these changes and of any further changes to mainland load relief.
There will be no change at this stage to the Tasmanian load relief.
James Guest
AEMO Operations
70929GENERAL NOTICE05/11/2019 08:41:37 AM
Market reporting for forecast extreme temperature in the Queensland region on 08/11/2019
AEMO ELECTRICITY MARKET NOTICE
AEMO's weather service provider has issued forecast temperatures for Queensland region that are equal to or greater than the Generation Capacity Reference Temperatures:
On 08/11/2019: Maximum forecast temperature 38 degrees C at Archerfield for the Brisbane area
Further updates to this advice may not be provided.
AEMO requests Market Participants to:
1. review the weather forecast in the local area where their generating plants are located and,
2. if required, update the generation levels in their dispatch offers consistent with the forecast temperatures.
Details on Generation Capacity Reference Temperatures can be accessed using the following link to AEMO website:
http://www.aemo.com.au/Electricity/Planning/Related-Information/Generation-Information
Generation Capacity Reference Temperatures:
QUEENSLAND - BRISBANE AREA 37 degrees C.
NEW SOUTH WALES - SYDNEY AREA 42 degrees C.
VICTORIA - MELBOURNE AREA 41 degrees C.
SOUTH AUSTRALIA - ADELAIDE AREA 43 degrees C.
TASMANIA - GEORGE TOWN 30 degrees C.
BASSLINK- (Latrobe Valley Airport 43 degrees C AND GEORGE TOWN 33 degrees C)
Harmohan Singh
AEMO Operations
AEMO's weather service provider has issued forecast temperatures for Queensland region that are equal to or greater than the Generation Capacity Reference Temperatures:
On 08/11/2019: Maximum forecast temperature 38 degrees C at Archerfield for the Brisbane area
Further updates to this advice may not be provided.
AEMO requests Market Participants to:
1. review the weather forecast in the local area where their generating plants are located and,
2. if required, update the generation levels in their dispatch offers consistent with the forecast temperatures.
Details on Generation Capacity Reference Temperatures can be accessed using the following link to AEMO website:
http://www.aemo.com.au/Electricity/Planning/Related-Information/Generation-Information
Generation Capacity Reference Temperatures:
QUEENSLAND - BRISBANE AREA 37 degrees C.
NEW SOUTH WALES - SYDNEY AREA 42 degrees C.
VICTORIA - MELBOURNE AREA 41 degrees C.
SOUTH AUSTRALIA - ADELAIDE AREA 43 degrees C.
TASMANIA - GEORGE TOWN 30 degrees C.
BASSLINK- (Latrobe Valley Airport 43 degrees C AND GEORGE TOWN 33 degrees C)
Harmohan Singh
AEMO Operations
70837GENERAL NOTICE31/10/2019 12:20:35 PM
Update to Moorabool - Mortlake 500 kV ine outages and concurrent outage of Heywood (Bus No.2) and Heywood - Mortlake line.
For Moorabool (MLTS) - Mortlake (MOPS) 500 kV line outages: refer to AEMO Electricity Market Notice 70360
For these outages please note change to the outage times of the MLTS - MOPS line outage as follows:
- on 07/11, 08/11. 09/11 and 10/11/2019 - planned outages time are from 0530 hrs to 1700 hrs (previously 0600 hrs to 1600hrs)
In addition, please note scheduled planned outage of the Heywood (HYTS) No.2 500 kV Bus on 09/11/2019 from 0530 hrs to 1730 hrs.
This bus outage offload Heywood M2 500/275 kV transformer and HYTS- MOPS 500 kV line
A credible contingency event during these planned outages 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 47-52 Hz 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 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.
Please note the following constraint set are invoked for these outages:
F-I-HYSE, I-VS_050, S-X_BC_CP, V-HYTX_M12, V-HY_500BUS, V-X_HY_MO_ML.
Please refer to AEMO Network Outage Scheduler (NOS) for further details.
Mya San
AEMO Operations
For these outages please note change to the outage times of the MLTS - MOPS line outage as follows:
- on 07/11, 08/11. 09/11 and 10/11/2019 - planned outages time are from 0530 hrs to 1700 hrs (previously 0600 hrs to 1600hrs)
In addition, please note scheduled planned outage of the Heywood (HYTS) No.2 500 kV Bus on 09/11/2019 from 0530 hrs to 1730 hrs.
This bus outage offload Heywood M2 500/275 kV transformer and HYTS- MOPS 500 kV line
A credible contingency event during these planned outages 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 47-52 Hz 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 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.
Please note the following constraint set are invoked for these outages:
F-I-HYSE, I-VS_050, S-X_BC_CP, V-HYTX_M12, V-HY_500BUS, V-X_HY_MO_ML.
Please refer to AEMO Network Outage Scheduler (NOS) for further details.
Mya San
AEMO Operations
70808GENERAL NOTICE30/10/2019 10:28:12 PM
Network Augmentation Commissioned - Vic Region - 30/10/2019
AEMO ELECTRICITY MARKET NOTICE
A network augmentation has been commissioned in the Vic region as follows:
Haunted Gully Terminal Station has been cut into the existing Moorabool-Tarrone No. 1 500 kV Transmission line to form the following circuits:
Moorabool-Haunted Gully No. 1 500 kV Transmission line
Haunted Gully-Tarrone No. 1 500 kV Transmission line
At Haunted Gully Terminal Station, the following plant has been commissioned:
No. 1 500 kV bus
No. 2 500 kV bus
1-2 500 kV bus tie
Manager NEM Real Time Operations
A network augmentation has been commissioned in the Vic region as follows:
Haunted Gully Terminal Station has been cut into the existing Moorabool-Tarrone No. 1 500 kV Transmission line to form the following circuits:
Moorabool-Haunted Gully No. 1 500 kV Transmission line
Haunted Gully-Tarrone No. 1 500 kV Transmission line
At Haunted Gully Terminal Station, the following plant has been commissioned:
No. 1 500 kV bus
No. 2 500 kV bus
1-2 500 kV bus tie
Manager NEM Real Time Operations
70798GENERAL NOTICE30/10/2019 03:07:19 PM
Cancellation: Planned outage of Moorabool - Tarrone 500 kV line in Victoria region
AEMO ELECTRICITY MARKET NOTICE
Cancellation: The planned outage of the Moorabool - Tarrone 500 kV line in the Victoria (VIC) region for the following days has been cancelled:
31/10/2019
01/11/2019
02/11/2019
03/11/2019
04/11/2019
05/11/2019
06/11/2019
Refer to AEMO Electricity Market Notices 70009 and 70588.
The Moorabool - Tarrone 500 kV line outages were planned to be out of service from 0600 - 1600 hrs.
All constraint sets associated with this outage have been revoked.
Manish Bhaskar
AEMO Operations
Cancellation: The planned outage of the Moorabool - Tarrone 500 kV line in the Victoria (VIC) region for the following days has been cancelled:
31/10/2019
01/11/2019
02/11/2019
03/11/2019
04/11/2019
05/11/2019
06/11/2019
Refer to AEMO Electricity Market Notices 70009 and 70588.
The Moorabool - Tarrone 500 kV line outages were planned to be out of service from 0600 - 1600 hrs.
All constraint sets associated with this outage have been revoked.
Manish Bhaskar
AEMO Operations