Hot on the heels of the suspension of the SA market on 18th February 2022, we also saw the TAS market suspended on 1st March 2022 … again due to loss of SCADA systems.
On 16th March 2022, the AEMO published this ‘Preliminary Report: Tasmania market suspension on 1 March 2022’:
This preliminary report notes that:
‘At approximately 1200 hrs on 1 March 2022, following two separate, unrelated incidents causing damage to both Telstra fibre cables linking Tasmania to the Australian mainland, the Inter-Control Centre Communications Protocol (ICCP) link between AEMO and TasNetworks was severed. As a result, AEMO lost all Supervisory Control and Data Acquisition (SCADA) visibility in Tasmania and subsequently suspended the spot market in Tasmania from 1235 hrs to 1915 hrs.
Based on initial analysis, AEMO believes that the power system remained in a secure operating state throughout the market suspension, and that no generation or load was lost because of the incident. During the event Tasmanian prices were set using market suspension schedule pricing’
As with the incident in South Australia …
‘AEMO will undertake further analysis relating to this event and prepare a final incident report in due course. The final report will include all the market suspension reporting requirements specified in NER 3.14.3(c)-(d) and 3.14.4(f)-(g).’