Wholesale Demand Response Capacity in June 2025
WDR capacity has increased by 23 MW since our last look, and much of it happened recently.
WDR capacity has increased by 23 MW since our last look, and much of it happened recently.
System frequency shows improved resilience to sudden coal generation events since 2020.
A count of coal generator events indicates large unit trips are less frequent.
In reviewing system frequency on the 16th of June, 2025, we observed a drop that reached below the NOFB.
Wednesday evening 11th June 2025 was a period of tight supply-demand balance, hence energy price volatility – and so this article reviews the response of the demand-side.
A sequence of afternoon intervals stand out because the forecast appeared to be biased low – self-forecasts suddenly dropped roughly 30-40 percentage points and then increased a short time later.
Theoretically, if a self-forecasting system never offers forecasts for more than 60% of intervals it may perpetually skip the performance assessment and the system could continue for use unsuppressed.
Taking a guess at frequency need to earn a positive causer-pays factor through self-forecast biasing appears at-best uncertain in the intervals we review.
In another style of biasing a self-forecast, "lunar megawatts" represent an expectation of solar farm generation at night when it really should be zero.
The forecast differences would contribute to improved lower RMSE and MAE scores, relative to AWEFS_ASEFS, in the weekly performance assessment.
In today’s article (part 1 in this series) we present an example of biasing (at an unnamed solar farm), which we find aligns with FCAS cost mitigation.
The NSW dispatch energy price jumped to 17,560 $/MWh in the 16:50 dispatch interval on 28 May, 2025.
The measurements indicated frequency ducked just below the NOFB briefly, reaching 49.843 Hz.
47% of dispatch intervals for semi-scheduled solar units are seeing a self-forecast used. When there are gaps, was the unit suppressed?
In this article we delve into the indicators we can uncover which point to the increase in market interventions and generator directions over recent years.
We summarise how wind units are using self-forecasting to-date. The analysis leads us to consider where upcoming market change may lead the industry.
At 16:01 on April 10, 2025, a system frequency dip was observed from the Global-Roam frequency logger.
High speed frequency measurements provide a deeper understanding of how the system responded to the unplanned 500kV line outage.
By day-end on the Friday the 7th demand levels were down more than 40% in the Gold Coast. Other areas were also impacted.
We thank the Clean Energy Council for the opportunity to share insights into revenue trends, cost trends, and analysis of upcoming changes for units operating in the NEM.