It seems like almost every day that AEMO needs to issue Directions in the South Australian region because of its own unique technical (and commercial) dynamics … but my sense is that it’s much rarer in other regions.
Which is why Market Notice 118151 jumped out at me – given that it involves a Direction in the NSW region:
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MARKET NOTICE
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From : AEMO
To : NEMITWEB1
Creation Date : 05/09/2024 15:12:06
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Notice ID : 118151
Notice Type ID : MARKET INTERVENTION
Notice Type Description : Reserve Contract / Direction / Instruction
Issue Date : 05/09/2024
External Reference : Direction – NSW region 05/09/2024
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Reason :
AEMO ELECTRICITY MARKET NOTICE
Direction – NSW region 05/09/2024
In accordance with clause 4.8.9(a)(1) of the National Electricity Rules, AEMO is issuing a direction to Snowy Hydro Limited. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
Direction issued to: Snowy Hydro Limited – TUMUT3 TUMUT3 at 1405 hrs 05/09/2024
Type of resource: load
Required actions: maintain 0 MW output at 1405 hrs 05/09/2024 TUMUT3 Pump 4 and Pump 5
Services provided: Energy
Circumstances necessitating the Overload
Circumstances necessitating the Direction additional detail: intervention is required to maintain the power system in a secure operating state
Expected duration: 1440 hrs 05/09/2024
Snowy Hydro Limited does not incur any civil monetary liability for a relevant action taken in accordance with this direction unless the action is taken in bad faith.
Manager NEM Real Time Operations
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END OF REPORT
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Posted as a curiosity, more than anything else.
Likely something to do with that low frequency noted in your earlier posts Paul.