The AEMO have declared an unexpected but temporary suspension of the market in NSW following a failure of SCADA systems within the region:
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MARKET NOTICE
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From : AEMO
To : NEMITWEB1
Creation Date : 17/03/2023 20:10:48
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Notice ID : 106784
Notice Type ID : MARKET SUSPENSION
Notice Type Description : Market suspended in region(s).
Issue Date : 17/03/2023
External Reference : Declaration of electricity market suspension
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Reason :
AEMO ELECTRICITY MARKET NOTICE
Declaration of electricity market suspension
AEMO declares the spot market suspended in New South Wales with Market Suspension Schedule Pricing (refer NER clause 3.14.5(b)) from Trading Interval 2015 hrs on 17 March 2023 until further notice.
Dispatch prices for the first one or two dispatch intervals of this market suspension will be reviewed manually.
AEMO has determined that it has become impossible to operate the spot market in accordance with the provisions of the Rules due to
? Failure of SCADA systems in NSW.
Manager NEM Real Time Operation
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END OF REPORT
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Which followed an earlier notice about 20 minute prior:
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From : AEMO
To : NEMITWEB1
Creation Date : 17/03/2023 19:47:13
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Notice ID : 106783
Notice Type ID : GENERAL NOTICE
Notice Type Description : Subjects not covered in specific notices
Issue Date : 17/03/2023
External Reference : AEMO is experiencing a service interruption relating to all NSW SCADA.
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Reason :
AEMO ELECTRICITY MARKET NOTICE
SERVICE INTERRUPTION
AEMO is experiencing a service interruption relating to all NSW SCADA.
AEMO will provide updates as more information becomes available.
Manager NEM Real Time Operations
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END OF REPORT
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More to follow..
Update as at 8:45pm Brisbane time: It looks as if the issue has been resolved, and market suspension will end at 21:10.
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MARKET NOTICE
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From : AEMO
To : NEMITWEB1
Creation Date : 17/03/2023 20:42:06
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Notice ID : 106785
Notice Type ID : MARKET SUSPENSION
Notice Type Description : Market suspended in region(s).
Issue Date : 17/03/2023
External Reference : Declaration of electricity market resumption
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Reason :
AEMO ELECTRICITY MARKET NOTICE
Declaration of electricity market resumption
Refer initial AEMO Electricity Market Notice 106784
AEMO declares that the suspension of the spot market in New South Wales will end at 2110 hrs on 17 March 2023.
Failure of SCADA systems in NSW have been resolved.
Relevant Market Notices issued under this suspension:
106784
Manager NEM Real Time Operations
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END OF REPORT
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PS1: Editor’s Note on Monday 20th March 2023
Readers here might be interested to note that Kate Summers has referenced this event in an update on LinkedIn here, where she says:
‘Given the SCADA failure in January 2021 (Editor – several articles here on WattClarity), 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?’
There is a conversation building at that location, and perhaps elsewhere as well…
as requested – posting coming from
https://www.linkedin.com/posts/kate-summers-aus_market-suspended-in-nsw-due-to-service-interruption-activity-7043440656442126336-P6_b
I think there’s possibly a bigger problem (albeit related to your root cause suspicion).
The question in my mind is what is the impact of rebidding (esp. as the interval decision point/s approach).
It’s an issue that is also seen, with much bigger numbers, in wagering in general but especially totalisators (TABs) as the “jump” approaches there is both an increase in information updates (approx dividends) and number of bets … and rapidly increases the transaction rate (it’s referred to as an avalanche and it doesn’t do it justice especially on big gallop races!).
Efforts to manage “collations” via (sub) aggregation results and new challenges (and ones that the pro-punters hate because they want (must) bet as late as possible with the most information)!
It’s only my opinion (thoughtful/considered but nonetheless still an opinion) that the market (especially the consumer) would be better served if “bids” (rebids) had a total limit or at least a cost to them (escalating as EoI approaches)
Without targetted research it’s difficult to be certain but imho it reasonable to assume that generators (the predominant bidders) are trying to maximise the despatch price. Unrestricted bidding facilitates that!