I also noted in the past week the AEMO’s publication of this report titled ‘Multiple incidents impacting NEM SCADA between 24th January 2021 and 18th November 2023’:
Inside the report (p12,13,14/36) is Table 3 that lists 18 discrete incidents over that (~ 3 year) period that relates to disruptions to SCADA systems and/or data:
1) With some of these having been previously recorded in articles on WattClarity.
2) It’s partly for that reason that I thought it would be useful to reference the report in here.
… but I’d not been aware that there were so many incidents.
Some elements of this table is copied below to provide a reference of the incidents – but refer to the report above for more information (including the resolutions):
| Date
(note – not all in chronological order) |
Incident #
in the AEMO report |
Description
from the AEMO Report |
|---|---|---|
|
Below we see that there are only 2 incidents (of the 18 in total) that occurred in 2021 |
||
|
24th Jan 2021 |
#1 |
Loss of AEMO SCADA in all regions. TNSPs managed system security. Initiated a review of the market suspension procedures. — This incident has already been discussed in several articles collated here on WattClarity. |
|
16th Feb 2021 |
#2 |
Loss of Ausnet SCADA in VIC. Loss of visibility for AEMO
|
|
Below we see that there are 6 incidents (of the 18 in total) that occurred in 2022 … which is more than in 2021, but fewer than in 2021. |
||
|
18th Feb 2022 |
#3 |
Loss of ElectraNet SCADA in SA. Loss of visibility for AEMO. Market suspension. — This incident has already been discussed in several articles collated here on WattClarity. |
|
1st March 2022 |
#4 |
Loss of AEMO SCADA in TAS. TNSP managed system security and frequency. Market suspension. — This incident has already been discussed in several articles collated here on WattClarity. |
|
5th April 2022 |
#5 |
SCADA links from TAS Hydro to TasNetworks failed for 28 minutes. AEMO and TasNetworks could not monitor the status of individual units. |
|
3rd May 2022 |
#6 |
Loss of SCADA from Powercor in VIC. Declared Transmission System Operator maintained visibility and assisted in coordinating system security. |
|
14th Sept 2022 |
#7 |
Dispatch errors during planned SCADA work resulting in incorrect telemetry and subsequent dispatch errors. |
|
29th Oct 2022 |
#8 |
Transgrid lost SCADA visibility for approximately 20 minutes. AEMO maintained visibility |
|
Below we see that there are 10 incidents (56% of the 18 in total) that occurred in 2023 … up from 6 incidents in 2022, which was up from 2 incidents in 2021. |
||
|
17th March 2023 |
#9 |
Loss of AEMO SCADA visibility in NSW TNSP maintained visibility Market suspension. — This incident has already been discussed in several articles collated here on WattClarity. — Also worth noting that, following the initial WattClarity article about this incident, on LinkedIn here Kate Summers wrote: ‘Given the SCADA failure in January 2021, is this indicative that the volume of tags required for new projects is exceeding the bandwidth and capacity of the comms and SCADA systems in the NEM? When will AEMO’s quest for behind the meter data from large RE projects be rethought as the very system that feeds actual data back into the dispatch engine is collapsing under the weight of too many tags. Common sense has to prevail at some stage.. what on earth do they use all the data for, all the time.. when collated figures are provided for the connection points?’ Further conversation ensued there. |
|
22nd April 2023 |
#10 |
Loss of Ausnet SCADA in VIC. Loss of visibility for AEMO. Market suspension. — This incident has already been discussed in several articles collated here on WattClarity. — Also worth noting that, following this incident, Clutch Consulting posted a note here on LinkedIn, and a conversation ensued there. |
|
18th May 2023 |
#11 |
Loss of SA Region SCADA data due to connection issues and loss of ICCP. |
|
5th July 2023 |
#12 |
Loss of Dispatch data for renewable generation in Western Vic. |
|
13th May 2023 |
#13 |
Loss of Dispatch data for renewable generation in Western NSW and HVDC interconnector data |
|
27th June 2023 |
#14 |
Loss of SCADA from Transgrid |
|
25th Oct 2023 |
#15 |
AGC Dispatch to generation in QLD impacted. Automatic frequency control could not be performed. |
|
8th Nov 2023 |
#16 |
SCADA in Southern NSW, Sydney and parts of Northern NSW had failed. Energy Australia informed AEMO that Mt Piper units had lost AGC signal. Riverina BESS confirmed they lost AGC signal as well. |
|
16th Nov 2023 |
#17 |
Loss of data from EVOenergy (and also sub-transmission lines in parallel with interconnectors) |
|
18th Nov 2023 |
#18 |
SCADA issue effecting TAS generation resulting in violating raise and lower regulation constraint violations. |
Readers here are recommended to read the AEMO report for further details of the steps taken in rectifying the underlying causes of the above.
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