CAISO/WEIM

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By Jason Fordney FOLSOM, Calif. — CAISO is refining market rule changes to more accurately reflect suppliers’ costs of producing and dispatching electricity while also increasing their bidding flexibility. Stakeholders attending an Aug. 3 workshop learned more about recent proposed changes to bidding rules in the ISO’s Commitment Cost and...

By Jason Fordney CAISO is developing new tools to deal with the variable output from the increasing amount of renewable and non-dispatchable generation on its grid, an effort that could bring fundamental changes to California’s resource adequacy rules. The tools are meant to deal with the highly variable output of new...

By Robert Mullin CAISO is nailing down its final preparations for the Aug. 21 solar eclipse, which is expected to take about 5,600 MW of utility-scale and rooftop solar generation off the California grid during morning hours when those resources would typically be ramping up output. Still, the grid operator...

By Jason Fordney Negative day-ahead prices surged in CAISO during the first quarter as combined surpluses of solar and hydroelectric output frequently left the market upside-down. Prices went negative during 51 hours in the day-ahead market over the three-month period, compared with just three hours in all of last year,...

By Robert Mullin CAISO hauled in the largest share of the $39.52 million in benefits produced by the Western Energy Imbalance Market (EIM) during the second quarter, the grid operator said in a report released Monday. The ISO was also the market’s dominant exporter of energy over the period as...

Calpine CEO Thad Hill confirmed Friday that the Houston-based merchant generation company is looking to be acquired. Citing anonymous sources, Bloomberg reported on Wednesday that Energy Capital Partners is in advanced talks to purchase Calpine and could announce a deal as soon as this week. During a call to discuss second-quarter...

By Jason Fordney FOLSOM, Calif. — The CAISO Board of Governors last week approved a set of market rules designed to aid the integration of distributed energy resources and transmission-connected energy storage into the ISO’s markets. ISO staff closely consulted with market participants over the past year to develop the...

By Jason Fordney FOLSOM, Calif. — The CAISO Board of Governors last week greenlit new rules that allow the grid operator to constrain the operations of gas plants across the state and the Western Energy Imbalance Market (EIM), part of a package of initiatives drawn up in response to the...

By Jason Fordney Southern California Gas Co.’s Aliso Canyon gas storage facility resumed injections Monday, despite Los Angeles County officials’ request that a state appeals court prevent the reopening. “SoCalGas must begin injections to comply with the [state’s] directive to maintain sufficient natural gas inventories at Aliso Canyon to support...

By Rich Heidorn Jr. While PJM stakeholders were meeting last week to consider yet more changes to the Reliability Pricing Model, public power representatives took their case to Congress, telling the House Energy and Commerce Committee on Tuesday that they should be released from participating in the increasingly complicated capacity...