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64196GENERAL NOTICE13/09/2018 08:36:07 AM
Planned outage of South East - Heywood No 1 275 kV line in the SA region on 12/10/2018
The South East - Heywood No 1 275 kV line in the South Australia (SA) region is planned to be out of service from 0800 hrs to 1700 hrs on 12/10/2018.
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:
- 35 MW of raise and lower regulation FCAS will be sourced from SA.
-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:
F-I-HYSE
I-HYSE
I-VS_050
S-HYSE_BC-2CP
S-X_BC_CP
V-HYTS_M12
Refer AEMO Network Outage Schedule (NOS) for further details.
Diyoni Hoole
AEMO Operations
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:
- 35 MW of raise and lower regulation FCAS will be sourced from SA.
-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:
F-I-HYSE
I-HYSE
I-VS_050
S-HYSE_BC-2CP
S-X_BC_CP
V-HYTS_M12
Refer AEMO Network Outage Schedule (NOS) for further details.
Diyoni Hoole
AEMO Operations
64093GENERAL NOTICE06/09/2018 06:05:13 AM
Possible intervention to manage power system security in South Australia (SA) Region - 06/09/2018
AEMO ELECTRICITY MARKET NOTICE
The synchronous generating units expected to be synchronised in SA from 1030 hrs 06/09/2018 to 1330 hrs 06/09/2018 in Pre-dispatch published at 0600 hrs 06/09/2018 are inadequate to maintain sufficient system strength in SA and hence a secure operating state.
AEMO currently estimates that, in the absence of sufficient market response by 0800 hrs 06/09/2018, AEMO may need to intervene by issuing a direction requiring one or more SA synchronous generating unit(s) to synchronise or remain synchronised to maintain power system security in SA.
Manager NEM Real Time Operations
The synchronous generating units expected to be synchronised in SA from 1030 hrs 06/09/2018 to 1330 hrs 06/09/2018 in Pre-dispatch published at 0600 hrs 06/09/2018 are inadequate to maintain sufficient system strength in SA and hence a secure operating state.
AEMO currently estimates that, in the absence of sufficient market response by 0800 hrs 06/09/2018, AEMO may need to intervene by issuing a direction requiring one or more SA synchronous generating unit(s) to synchronise or remain synchronised to maintain power system security in SA.
Manager NEM Real Time Operations
64089GENERAL NOTICE04/09/2018 01:54:50 PM
Cancellation - Possible intervention to manage power system security in South Australia (SA) Region - 05/09/2018
AEMO ELECTRICITY MARKET NOTICE
Correction to Market Notice 64088
Update to Market Notice 64080
Pre-dispatch published at 1330 hrs 04/09/2018 is indicating sufficient system strength in SA from 0100 hrs 05/09/2018 to 0800 hrs 05/09/2018 and hence a secure operating state.
Manager NEM Real Time Operations
Correction to Market Notice 64088
Update to Market Notice 64080
Pre-dispatch published at 1330 hrs 04/09/2018 is indicating sufficient system strength in SA from 0100 hrs 05/09/2018 to 0800 hrs 05/09/2018 and hence a secure operating state.
Manager NEM Real Time Operations
64088GENERAL NOTICE04/09/2018 01:51:34 PM
Cancellation - Possible intervention to manage power system security in South Australia (SA) Region - 05/09/2018
AEMO ELECTRICITY MARKET NOTICE
Update to Market Notice 64084
Pre-dispatch published at 1330 hrs 04/09/2018 is indicating sufficient system strength in SA from 0100 hrs 05/09/2018 to 0800 hrs 05/09/2018 and hence a secure operating state.
Manager NEM Real Time Operations
Update to Market Notice 64084
Pre-dispatch published at 1330 hrs 04/09/2018 is indicating sufficient system strength in SA from 0100 hrs 05/09/2018 to 0800 hrs 05/09/2018 and hence a secure operating state.
Manager NEM Real Time Operations
64080GENERAL NOTICE03/09/2018 02:11:15 PM
Possible intervention to manage power system security in South Australia (SA) Region - 05/09/2018
AEMO ELECTRICITY MARKET NOTICE
The synchronous generating units expected to be synchronised in SA from 0100 hrs 05/09/2018 to 0800 hrs 05/09/2018 in Pre-dispatch published at 1400 hrs 03/09/2018 are inadequate to maintain sufficient system strength in SA and hence a secure operating state.
AEMO currently estimates that, in the absence of sufficient market response by 1730 hrs 04/09/2018, AEMO may need to intervene by issuing a direction requiring one or more SA synchronous generating unit(s) to synchronise or remain synchronised to maintain power system security in SA.
Manager NEM Real Time Operations
The synchronous generating units expected to be synchronised in SA from 0100 hrs 05/09/2018 to 0800 hrs 05/09/2018 in Pre-dispatch published at 1400 hrs 03/09/2018 are inadequate to maintain sufficient system strength in SA and hence a secure operating state.
AEMO currently estimates that, in the absence of sufficient market response by 1730 hrs 04/09/2018, AEMO may need to intervene by issuing a direction requiring one or more SA synchronous generating unit(s) to synchronise or remain synchronised to maintain power system security in SA.
Manager NEM Real Time Operations
64041GENERAL NOTICE30/08/2018 09:11:50 AM
Network Augmentation Commissioned - Qld region - 29/08/2018
AEMO ELECTRICITY MARKET NOTICE
Network Augmentation Commissioned - Qld region - 29/08/2018
A network augmentation has been commissioned in the Qld region as follows:
The H13 Ross to T241 Lake Ross (7458) 132 kV transmission line and the T241 Lake Ross No. 1 transformer were commissioned at 1859 hrs 29/08/2018.
Manager NEM Real Time Operations
Network Augmentation Commissioned - Qld region - 29/08/2018
A network augmentation has been commissioned in the Qld region as follows:
The H13 Ross to T241 Lake Ross (7458) 132 kV transmission line and the T241 Lake Ross No. 1 transformer were commissioned at 1859 hrs 29/08/2018.
Manager NEM Real Time Operations
64032GENERAL NOTICE29/08/2018 03:19:55 PM
Update - Vulnerable Transmission Lines in the QLD Region
EMO ELECTRICITY MARKET NOTICE
Update - Vulnerable Transmission Lines in the QLD Region
Refer to AEMO Electricity Market Notice 64003
At 1312 hrs 25/08/2018 the Dumaresq to Bulli Creek (8L) and (8M) 330 kV Transmission lines tripped out of service.
The cause of the trip has been identified as due to Lightning.
In accordance with SO_OP_3715 section 11, AEMO now considers the Dumaresq to Bulli Creek (8L) and (8M) 330 kV Transmission lines to be vulnerable with a category of probable due to Lightning.
Manager NEM Real Time Operations
Update - Vulnerable Transmission Lines in the QLD Region
Refer to AEMO Electricity Market Notice 64003
At 1312 hrs 25/08/2018 the Dumaresq to Bulli Creek (8L) and (8M) 330 kV Transmission lines tripped out of service.
The cause of the trip has been identified as due to Lightning.
In accordance with SO_OP_3715 section 11, AEMO now considers the Dumaresq to Bulli Creek (8L) and (8M) 330 kV Transmission lines to be vulnerable with a category of probable due to Lightning.
Manager NEM Real Time Operations
63929GENERAL NOTICE16/08/2018 04:48:59 PM
Network Augmentation Commissioned - Qld Region
AEMO ELECTRICITY MARKET NOTICE
Network Augmentation Commissioned - Qld Region
A network augmentation has been commissioned in the Qld Region as follows:
The Walkamin H60 to Mount Emerald wind farm (8903) 275 kV Transmission line was commissioned at 1624 hrs 16/08/2018.
Manager NEM Real Time Operations
Network Augmentation Commissioned - Qld Region
A network augmentation has been commissioned in the Qld Region as follows:
The Walkamin H60 to Mount Emerald wind farm (8903) 275 kV Transmission line was commissioned at 1624 hrs 16/08/2018.
Manager NEM Real Time Operations
63880GENERAL NOTICE14/08/2018 06:08:27 PM
Network Augmentation Commissioned - Qld Region - 14/08/2018
AEMO ELECTRICITY MARKET NOTICE
Network Augmentation Commissioned - Qld Region - 14/08/2018
A network augmentation has been commissioned in the Qld Region as follows:
The Strathmore H35 to Crush Creek H87 (8906) 275 kV Transmission line and Crush Creek 275/33 kV substation was commissioned at 1700 hrs 14/08/2018.
Manager NEM Real Time Operations
Network Augmentation Commissioned - Qld Region - 14/08/2018
A network augmentation has been commissioned in the Qld Region as follows:
The Strathmore H35 to Crush Creek H87 (8906) 275 kV Transmission line and Crush Creek 275/33 kV substation was commissioned at 1700 hrs 14/08/2018.
Manager NEM Real Time Operations