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Eversource urges PURA to allow interim RAM rate updates after showing large swings in Millstone PPA benefit projections
Summary
Company witnesses and counsel told the authority that volatility in PPA prices — demonstrated by differences between a March MBFMCC filing and April written exceptions — produced large swings in the net PPA benefit projection and that the company requests PURA consider allowing interim rate adjustments when actual experience materially deviates.
Eversource staff told the Public Utilities Regulatory Authority that volatility in power‑purchase and market price assumptions tied to the Millstone PPA materially changed projected net PPA benefits within a few weeks, and the company asked the commission to consider a process that would permit interim adjustments to RAM/Grama rates if actual experience diverges substantially from assumptions used to set rates.
Nut graf: OCC and PURA questions showed the company’s initial March 3 MBFMCC filing (which relied on prior‑year historicals and limited known‑and‑measurable adjustments) produced a per‑kWh rate forecast materially higher than…
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