Market Notices

91693GENERAL NOTICE14/10/2021 01:57:49 PM

Daily planned outage of Heywood No.1 500 kV busbar in the Victoria region on 25, 26, 27, 28 and 29 October 2021

AEMO ELECTRICITY MARKET NOTICE

The Heywood No.1 500 kV busbar in the Victoria (VIC) region is planned to be out of service from:
- 0400 hrs to 1000 hrs on 25/10/2021;
- 0400 hrs to 1000 hrs on 26/10/2021;
- 0300 hrs to 1000 hrs on 27/10/2021;
- 0300 hrs to 1000 hrs on 28/10/2021; and
- 1400 hrs to 1600 hrs on 29/10/2021.

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:

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
     
91535GENERAL NOTICE08/10/2021 02:18:24 PM

Outages Cancelled - Planned outages of Heywood 500 kV Circuit Breaker and Heywood No.1 500 kV bus in the Victoria region on 11/10/2021 to 15/10/21

AEMO ELECTRICITY MARKET NOTICE

Refer to AEMO Electricity Market Notices 91495 and 91491.

The following outages planned for the Heywood - Tarrone No. 1 line No. 1 500 kV bus Circuit Breaker and Heywood No.1 500 kV busbar for the Victoria (VIC) region have been cancelled.

Heywood - Tarrone No. 1 line No. 1 500 kV bus Circuit Breaker:
- 0300 hrs to 0900 hrs on 11/10/2021; and
- 0300 hrs to 0900 hrs on 12/10/2021;

Heywood No.1 500 kV busbar:
- 0400 hrs to 1000 hrs on 13/10/2021;
- 0400 hrs to 1000 hrs on 14/10/2021; and
- 1500 hrs to 1700 hrs on 15/10/2021;


All constraint sets associated with these outages have been revoked.

AEMO Operations
     
91495GENERAL NOTICE05/10/2021 02:24:25 PM

Daily planned outage of Heywood 500 kV Circuit Breaker CB210 in the Victoria region on 11 and 12 October 2021

AEMO ELECTRICITY MARKET NOTICE

The Heywood 500 kV Circuit Breaker CB210 in the Victoria (VIC) region is planned to be out of service from:

- 0300 hrs to 0900 hrs on 11/10/2021; and
- 0300 hrs to 0900 hrs on 12/10/2021.

This outage will offload APD-Heywood-Tarrone 500kV line at Heywood end.

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:

F-I-HYSE
S-X_BC_CP
V-HYCB_210_213
I-VS_050

Refer AEMO Network Outage Schedule (NOS) for further details.

AEMO Operations
     
91491GENERAL NOTICE05/10/2021 01:29:19 PM

Daily planned outage of Heywood No.1 500 kV busbar in the Victoria region on 13, 14 and 15 October 2021

AEMO ELECTRICITY MARKET NOTICE

The Heywood No.1 500 kV busbar in the Victoria (VIC) region is planned to be out of service from:
- 0400 hrs to 1000 hrs on 13/10/2021;
- 0400 hrs to 1000 hrs on 14/10/2021; and
- 1500 hrs to 1700 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:

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
     
91389GENERAL NOTICE01/10/2021 12:02:29 AM

5MS Rule Commencement Notice - 01/10/2021

AEMO ELECTRICITY MARKET NOTICE

5MS Rule Commencement Notice - 01/10/2021

AEMO would like to notify the market that as of 0000 hrs 01/10/2021, AEMO will be settling the NEM on a 5 minute basis, in accordance with National Electricity Amendment (Five Minute Settlement) Rule 2017 No.15.

Please contact the AEMO Support Hub on 1300 236 600 if urgent assistance is required.

Manager NEM Real Time Operations
     
91340GENERAL NOTICE30/09/2021 11:17:51 AM

NEM Local Temperature Alerts for QLD from 1 Oct to 4 Oct 2021

AEMO ELECTRICITY MARKET NOTICE

AEMO's weather service provider has issued forecast temperatures equal to or greater than the NEM Local Temperature Alert Levels for listed weather stations below.

QLD
Rockhampton Ap (39+ Deg C): 4th Oct

The NEM Local Temperature Alert Levels are:

Launceston Ti Tree Bend: 33 Deg C, Dalby Airport: 37 Deg C, for all other selected weather stations: 39 Deg C.

AEMO requests Market Participants to:

1. review the weather forecast in the local area where their generating units / MNSP converter stations are located and,

2. if required, update the available capacity in their dispatch offers or availability submissions consistent with the forecast temperatures.

Further information is available at:

https://aemo.com.au/energy-systems/electricity/national-electricity-market-nem/nem-forecasting-and-planning/forecasting-and-reliability/projected-assessment-of-system-adequacy/nem-local-temperature-alerts

AEMO Operations
     
91323GENERAL NOTICE29/09/2021 06:11:19 PM

Network Augmentation Commissioned - NSW Region - 29/09/2021

AEMO ELECTRICITY MARKET NOTICE

Network Augmentation Commissioned - NSW Region - 29/09/2021

The following reactive plant has been commissioned at Dumaresq substation.

No 1 330 kV 125 MVAR Capacitor

No 2 330 kV 125 MVAR Capacitor

Manager NEM Real Time Operations
     
90961GENERAL NOTICE22/09/2021 07:02:51 PM

Network Augmentation Commissioned - NSW Region - 22/09/2021

AEMO ELECTRICITY MARKET NOTICE

Network Augmentation Commissioned - NSW Region - 22/09/2021

At Tamworth, a new 330 kV bus section circuit breaker CB 5112 has been commissioned at 1900 hrs 22/09/2021.

Manager NEM Real Time Operations
     
90948GENERAL NOTICE22/09/2021 11:41:06 AM

AEMO is aware of the earthquake at 0915 hrs in the VIC region.

AEMO ELECTRICITY MARKET NOTICE.

AEMO is aware of todays earthquake at 0915 hrs.

There has been no major loss of generation in the NEM.

There has been no major impact on transmission other than the non-credible event referenced in market notice(s) 90937 and 90939 and the trip of the Mount Beauty to Mackay tee Bogong 220 kV transmission line which remains out of service.

AEMO is continuing to monitor the situation in regard to aftershocks.

Manager NEM Real Time Operations
     
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