Severe weather in TAS causes disconnects customer load – and coincides with transmission line trips

MN 96962

Sat 11th 21:18:16

This one says:

‘Inter-regional transfer limit variation – Chapel St – Gordon No. 2 220 kV Line – Tas region – 11/06/2022

At 2106 hrs 11/06/2022 there was an unplanned outage of Chapel St – Gordon No. 2 220 kV Line

Constraint sets invoked: T-CSGO, F-T-CSGO’

MN 96964

Sat 11th 23:12:09

This one says:

‘At 2229 hrs the Palmerston – St Marys tee Avoca 110 kV Line tripped and Mussleroe Wind Farm reduced output by approximately 135 MW.

AEMO did not instruct load shedding.

Approximately 9 MW load was lost.’

MN 96965

Sun 12th 02:01:19

This one says:

‘At 0131 hrs the Burnie – Hampshire 110 kV Line tripped at the Burnie end only.

AEMO did not instruct load shedding.

AEMO has not been advised of any disconnection of bulk electrical load.’

MN 96966

Sun 12th 05:36

This one says:

‘At 0456 hrs the Burnie – Hampshire 110 kV Line tripped. At the same time the Burnie – Sheffield No. 2 110 kV Line tripped at the Burnie end only and Studland Bay WF tripped from 62 MW

AEMO did not instruct load shedding.

AEMO has not been advised of any disconnection of bulk electrical load.’

MN 96967 (refers to 96964)

Sun 12th June 09:04:53

This one says:

‘At 2229 hrs the Palmerston – St Marys tee Avoca 110 kV Line tripped and Mussleroe Wind Farm reduced output by approximately 135 MW.

The cause of this non credible contingency event is not known at this stage

AEMO is not satisfied that this non credible event is unlikely to re-occur.

AEMO has therefore reclassified this event as a credible contingency event until further notice.

Region: Tas
Duration: 12/06/2022 08:45 until further notice
Constraint set(s) invoked: Nil’