4.1 Queensland Transmission Assets

Asset Owners based in Queensland apply seasonal alternate ratings and dynamic ratings as shown below.

2 Season Day Night
Summer Day - (QLD_SUM_D) 06:00 - 18:00 Start of October to End of April
Summer Night - (QLD_SUM_N) 18:00 - 06:00 Start of October to End of April
Winter Day - (QLD_WIN_D) 06:00 - 18:00 Start of May to End of September
Winter Night - (QLD_WIN_N) 18:00 - 06:00 Start of May to End of September

3 Season
Winter - (QLDWIN) Start of June to End of August
Spring/Aut - (QLDAUT/SPR) September Start of April to End of May
Summer - (QLDSUM) Start of October to End of March

Dynamic Telemetered Ratings
Dynamic ratings are available for selected circuits. These ratings are telemetered as a real time quantity to AEMO for use in the dispatch timeframe (QLDSUM_D, QLDAUT_SPR_D, QLDWIN_D, QLD_DYN).

4.2 New South Wales Transmission Assets

Asset Owners based in New South Wales apply seasonal alternate ratings and dynamic ratings as shown below.

Summer / Winter (for cables)
Summer - (NSWSUM_C) Start of November to End of April
Winter - (NSWWIN_C) Start of May to End of October
Summer - (EA_SUM_C) Start of November to End of April
Winter - (EA_WIN_C) Start of May to End of October

Summer / Winter (for lines, transformers and outdoor switchgear)
Summer - (NSWSUM) Start of October to End of March
Winter - (NSWWIN) Start of April to End of September
Summer - (EA_SUM) Start of November to End of March
Winter - (EA_WIN) Start of April to End of October

2 Seasons Day Night

Summer Day - (EA_SUM_D) 07:00 – 19:00 Start of October to End of April
Summer Night - (EA_SUM_N) 19:00 – 07:00 Start of October to End of April
Winter Day - (EA_WIN_D) 07:00 – 18:00 Start of May to End of September
Winter Night - (EA_WIN_N) 18:00 – 07:00 Start of May End of September

3 Season Day Night
Summer Day - (N_SUM_D) 05:00 - 19:00 Start of December to End of February
Summer Night - (N_SUM_N) 19:00 - 05:00 Start of December to End of February
Spr/Aut Day - (N_AUT/SPR_D) 06:00 - 18:00 Start of September to End of Nov. 06:00 - 18:00 Start of March to End of May
Spr/Aut Night - (N_AUT/SPR_N) 18:00 - 06:00 Start of September to End of Nov.
18:00 - 06:00 Start of March to End of May
Winter Day - (N_WIN_D) 07:00 - 17:00 Start of June to End of August
Winter Night - (N_WIN_N) 17:00 - 07:00 Start of June to End of August

Monthly Day Night
January Day - (JAN_DAY) 05:00 - 19:00 Start of January to End of January
January Night - (JAN_NIGHT) 19:00 - 05:00 Start of January to End of January
February Day - (FEB_DAY) 05:00 - 19:00 Start of February to End of February
February Night - (FEB_NIGHT) 19:00 - 05:00 Start of February to End of February
March Day - (MAR_DAY) 06:00 - 18:00 Start of March to End of March
March Night - (MAR_NIGHT) 18:00 - 06:00 Start of March to End of March
April Day - (APR_DAY) 06:00 - 18:00 Start of April to End of April
April Night - (APR_NIGHT) 18:00 - 06:00 Start of April to End of April
May Day - (MAY_DAY) 06:00 - 18:00 Start of May to End of May
May Night - (MAY_NIGHT) 18:00 - 06:00 Start of May to End of May
June Day - (JUN_DAY) 07:00 - 17:00 Start of June to End of June
June Night - (JUN_NIGHT) 17:00 - 07:00 Start of June to End of June
July Day - (JUL_DAY) 07:00 - 17:00 Start of July to End of July
July Night - (JUL_NIGHT) 17:00 - 07:00 Start of July to End of July
August Day - (AUG_DAY) 07:00 - 17:00 Start of August to End of August
August Night - (AUG_NIGHT) 17:00 - 07:00 Start of August to End of August
September Day - (SEP_DAY) 06:00 - 18:00 Start of September to End of Sept
September Night - (SEP_NIGHT) 18:00 - 06:00 Start of September to End of Sept
October Day - (OCT_DAY) 06:00 - 18:00 Start of October to End of October
October Night - (OCT_NIGHT) 18:00 - 06:00 Start of October to End of October
November Day - (NOV_DAY) 06:00 - 18:00 Start of November to End of Nov.
November Night - (NOV_NIGHT) 18:00 - 06:00 Start of November to End of Nov.
December Day - (DEC_DAY) 0500 - 19:00 Start of December to End of Dec.
December Night - (DEC_NIGHT) 19:00 - 05:00 Start of December to End of Dec.

Dynamic Telemetered Ratings

Dynamic ratings are available for selected circuits. These ratings are telemetered as a real time quantity to AEMO for use in the dispatch timeframe (N_SUM_D_D, N_SUM_N_D, N_AUTSPR_D_D, N_AUTSPR_N_D, N_WIN_D_D, N_WIN_N_D, N_3SDN_DYN).

4.3 Victorian Transmission Assets

Asset Owners based in Victoria apply seasonal alternate ratings, temperature based ratings and dynamic ratings as shown below.

2 Season
Summer - (VICSUM) Start of November to End of April
Winter - (VICWIN) Start of May to End of October

3 Season Day Night
Summer Day - (V_SUM_D) 06:00 - 21:00 Start of November to End of March
Summer Night - (V_SUM_N) 21:00 - 06:00 Start of November to End of March
Spr/Aut Day - (V_AUT/SPR_D) 06:00 - 21:00 Start of September to End of Oct. 06:00 - 21:00 Start of April to End of May
Spr/Aut Night - (V_AUT/SPR_N) 21:00 - 06:00 Start of September to End of Oct. 21:00 - 06:00 Start of April to End of May
Winter Day - (V_WIN_D) 07:00 - 19:00 Start of June to End of August
Winter Night - (V_WIN_N) 19:00 - 07:00 Start of June to End of August

Temperature Based Ratings
Temperature based ratings are available for selected circuits. Selection is based on ambient temperatures with 5 degree steps from 5 degrees to 45. The temperature is telemetered as a real time quantity to AEMO for use in the dispatch timeframe. Predefined temperature profiles are applied to the predispatch timeframe.
Please refer to the Victorian Temperature profiles. These profiles are applied in AEMO applications and the same temperature profiles are repeated each year.

Dynamic Telemetered Ratings
Dynamic ratings are available for selected circuits. These ratings are telemetered as a real time quantity to AEMO for use in dispatch timeframe (they have the same identifier as the Victorian Temperature profiles identifier, but they additionally include the suffix “_D” at the end of the identifier).

4.4 South Australian Transmission Assets

Asset Owners based in South Australia apply seasonal alternate ratings and dynamic ratings as shown below.

3 Season (for future timeframe)
Winter - (SAWIN) Start of June to End of August
Spring/Aut - (SAAUT/SPR) Start of March to End of May / Start of September to End of November
Summer - (SASUM) Start of December to End of February

3 Season (for dispatch timeframe)
A selection indicator is telemetered to AEMO for the seasonal ratings used in the dispatch timeframe. The selection of particular seasonal ratings is managed by this telemetered indicator (1, 2, or 3) provided by the asset owner as shown below.
Winter - (SAWIN) < 20 degrees
Spring/Aut - (SAAUT/SPR) > 20 & < 30
Summer - (SASUM) > 30 degrees

Dynamic Telemetered Ratings
Dynamic ratings are available for selected circuits. These ratings are telemetered as a real time quantity to AEMO for use in dispatch timeframe (SASUM_D, SAAUT_SPR_D, SAWIN_D, SA_DYN).

4.5 Tasmanian Transmission Assets

Asset Owners based in Tasmania apply seasonal alternate ratings, temperature based ratings and dynamic ratings as shown below.

2 Season
Summer - (TASSUM) Start of Dec to End of Feb
Winter - (TASWIN) Start of March to End of November

Temperature Based Ratings
Temperature based ratings are available for selected circuits. Selection is based on ambient temperatures with 5 degree steps from 0 degrees to 40 degrees. The temperature is telemetered as a real time quantity to AEMO for use in the dispatch timeframe. Predefined temperature profiles are applied to the predispatch timeframe. Please refer to Tasmanian Temperature profiles. These profiles are applied in AEMO applications and the same temperature profiles are repeated each year.

Dynamic Telemetered Ratings
Dynamic ratings are available for selected circuits. These ratings are telemetered as a real time quantity to AEMO for use in dispatch timeframe (they have the same identifier as the Tasmanian Temperature profiles identifier).

• Tasmanian Temperature Profile
• Victorian Temperature Profile