Market Notices

81534GENERAL NOTICE21/12/2020 11:03:42 AM

NEM Local Temperature Alerts for QLD from 21 Dec 2020 to 25 Dec 2020

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
Dalby Ap (37+ Deg C): 21st Dec

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 Planning
81532GENERAL NOTICE21/12/2020 08:26:29 AM

Planned outage of Moorabool - Haunted Gully and Haunted Gully - Tarrone 500 kV lines in the Victoria region from the 15 January 2021 - 22 January 2021

AEMO ELECTRICITY MARKET NOTICE

The Moorabool - Haunted Gully and Haunted Gully - Tarrone 500 kV lines in the Victoria (VIC) region is planned to be out of service from 15 January 2021 0500hrs to 22 January 2021 1730hrs.

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
V-X_HG_ML_TR

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

Diyoni Hoole
AEMO Operations
81408GENERAL NOTICE18/12/2020 12:11:39 PM

Cancellation - Non-credible contingency event more likely to occur due to existence of abnormal condition/s - Vic region.


Cancellation - Non-credible contingency event more likely to occur due to existence of abnormal condition/s - Vic region.

Refer to MNs 81294, 81291 and 81371

AEMO has been advised that there is no longer abnormal condition in Victoria.

anager NEM Real Time Operations
81371GENERAL NOTICE17/12/2020 07:01:53 PM

Update - Non-credible contingency event more likely to occur due to existence of abnormal condition/s - Vic region.


Update - Non-credible contingency event more likely to occur due to existence of abnormal condition/s - Vic region.


Refer to MN 81294 and MN 81291

AEMO has received further information regarding the abnormal condition in Victoria.

There has been an update to the individual Lines affected.

The likelihood of these individual lines tripping is low and this abnormal condition is presently unlikely to require the application of constraints.

The Lines affected are:

? BATS - BETS 220 kV line
? DDTS - SMTS 1 330 kV line and DDTS - SMTS 2 330 kV line


Further information will be provided when available


Manager NEM Real Time Operations
81294GENERAL NOTICE17/12/2020 11:40:57 AM

Update - Non-credible contingency event more likely to occur due to existence of abnormal condition/s - Vic region.


Update - Non-credible contingency event more likely to occur due to existence of abnormal condition/s - Vic region.


Refer to MN 81291

AEMO has received further information regarding the abnormal condition in Victoria.

The likelihood of these individual lines tripping is low and this abnormal condition is presently unlikely to require the application of constraints.

The Lines affected are:
? GTS - KTS 1 220 kV line and GTS - KTS 3 220 kV line
? GTS - MLTS 1 220 kV line andGTS - MLTS 2 220 kV line
? BETS - FVTS - SHTS 220 kV line and BATS - BETS 220 kV line
? MLTS - SYTS 1 500 kV line and MLTS - SYTS 2 500 kV line


Further information will be provided when available


Manager NEM Real Time Operations
81291GENERAL NOTICE17/12/2020 10:14:51 AM

Non-credible contingency event more likely to occur due to existence of abnormal condition/s - Vic region.

Based on advice received from AUSNET, AEMO has declared an abnormal condition associated with an increased risk of trip of the following transmission lines in Victoria

The Lines affected are:
? GTS - KTS 1 220 kV line and GTS - KTS 3 220 kV line
? GTS - MLTS 1 220 kV line andGTS - MLTS 2 220 kV line
? BETS - FVTS - SHTS 220 kV line and BATS - BETS 220 kV line
? MLTS - SYTS 1 500 kV line and MLTS - SYTS 2 500 kV line

AEMO is seeking further information and will update with further market notices

Manager NEM Real Time Operations
81028GENERAL NOTICE11/12/2020 09:50:16 AM

Planned outage of Moorabool - Haunted Gully and Haunted Gully - Tarrone 500 kV lines in the Victoria region on 15 December 2020

AEMO ELECTRICITY MARKET NOTICE

The Moorabool - Haunted Gully and Haunted Gully - Tarrone 500 kV lines in the Victoria (VIC) region is planned to be out of service as follows from 0600 hrs to 1600 hrs on 15/12/2020.

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
V-X_HG_ML_TR

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

AEMO Operations
81016GENERAL NOTICE11/12/2020 09:22:41 AM

Outage Cancelled: Planned outage of Moorabool - Haunted Gully and Haunted Gully - Tarrone 500 kV lines in the Victoria region scheduled 12 to 18 December 2020.

AEMO ELECTRICITY MARKET NOTICE

Refer to AEMO Electricity Market Notice 80990.

The Moorabool - Haunted Gully and Haunted Gully - Tarrone 500 kV lines outages in the Victoria (VIC) region were planned to be out of service from 0400 hrs on 12/12/2020 to 1600 hrs on 18/12/2020. These outages are now cancelled.

All constraint sets associated with this outage have been revoked.

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

AEMO Operations
81008GENERAL NOTICE11/12/2020 06:04:03 AM

Planned outage of Moorabool - Mortlake 500 kV line in the Victoria region from 15 March 2021 to 26 March 2021

AEMO ELECTRICITY MARKET NOTICE

Refer to AEMO market notice MN 80861.

The Moorabool - Mortlake 500 kV line in the Victoria (VIC) region originally planned to be out of service from 01 March 2021 1600hrs to 12 March 2021 1600hrs, has now been rescheduled to take place from 15 March 2021 0400hrs to 26 March 2021 1600hrs.

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:

S-X_BC_CP
V-MLMO

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

Diyoni Hoole
AEMO Operations
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