PJM market design flaws add BILLIONS to latest capacity auction costs: market monitor. A switch in how PJM measures power plant availability, one of several market issues flagged by Monitoring Analytics, increased capacity costs by $4.4 billion compared to its previous approach. The PJM Interconnection’s most recent capacity auction was significantly affected by market design flaws, including one that enables generation owners to increase prices by exerting market power, according to the grid operator’s independent market monitor.
Monitoring Analytics estimates that PJM’s new “effective load carrying capability” availability metric increased revenue in the record-setting July auction by about $4.4 billion, or by nearly 50%, compared to its previous “equivalent demand forced outage rate” metric, the market monitor said in an initial analysis of the auction released Friday. Other factors also contributed to a jump in capacity costs from the auction, according to the report. “At a time when significant generator retirements and increasing demand are causing system reserves to dwindle rapidly, we find the [market monitor’s] conclusion that much lower prices in our last capacity auction would have induced needed amounts of investment in generation capacity to not be credible,” Jeff Shields, a PJM spokesperson, said in an email Tuesday.
The report fails to include any review of factors that would potentially have increased the cost of capacity, including a specific sensitivity requested by PJM — namely what capacity prices would have been if several of the market monitor’s recommendations in its report on the previous base residual capacity auction had been followed, Shields said.
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