SWIS evening ramp reached a new record

Operational demand rose 2362 MW from the daily minimum to the evening peak, exceeding the previous 1885 MW record.

Market

SWIS

Observed

21 November 2023

Triggered value

2,362 MW

Severity

extreme

Executive read

What changed

Measurement. Evening operational ramp reached 2,362 MW against a 1,885 MW reference.

Decision implication. A steeper ramp raises the quantity and speed of dispatchable response required as rooftop solar output falls away.

Evidence boundary. The event is a deterministic threshold or record comparison. It identifies a measurement that warrants investigation; it does not assign causality or quantify commercial exposure.

Operating context

Prior-window average

1,505 MW

Event observation

2,362 MW

Post-event average

1,562 MW

Event-day energy mix

Gas35.3% · 20,200 MWh

Coal32.3% · 18,448 MWh

Wind27.1% · 15,491 MWh

Other scheduled generation3.0% · 1,717 MWh

Utility solar2.3% · 1,327 MWh

Questions for the decision

What operating or market conditions coincided with this observation?
Was the value repeated, reversed or exceeded in the following days?
Which flexible resources, constraints or settlement exposures matter for the decision at hand?

Source trail

The measurement and context series are retained from the named primary operator or source release. Calculated shares and comparisons preserve the source boundary stated in the underlying Solar Analytica record.

https://data.wa.aemo.com.au/public/market-data/wemde/operationalDemandWithdrawal/dailyFiles/OperationalDemandAndWithdrawal_2023-11-21.json

Related precedents

2025-01-28SWIS evening ramp reached a new record2,412 MW

2024-12-22SWIS evening ramp reached a new record2,385 MW