Winter Storm Elliott brought a prolonged period of sub-freezing temperatures to New England; NEISO experienced reduced imports, some generator outages, and ~9 GW of uncommitted, available gas-fired capacity that resulted in a capacity shortfall and EEA Level 1 on December 24th.
During Elliott, generators ended up without natural gas - but not due to supply shortages. NEISO experienced real-time scarcity pricing while ~9 GW operable generation was offline due to failure to clear the day-ahead market, and subsequently not nominating firm gas transportation. Production from CCGTs with dual-fuel capability diverged dramatically from most CCGTs without dual-fuel capability.
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