Western Energy Imbalance Market (WEIM)

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By Robert Mullin CAISO last week provided stakeholders an update on its efforts to address concerns that the Energy Imbalance Market is not properly accounting for the impact of emissions from dispatching out-of-state resources into California — what the state’s Air Resources Board calls “carbon leakage.” “We are working collaboratively...

By Robert Mullin The western Energy Imbalance Market continued to boost demand for California’s surplus renewable generation last quarter, extending a trend observed during the first three months of 2016, according to CAISO’s quarterly economic benefits report. The eight-state EIM — comprising the CAISO, NV Energy and PacifiCorp balancing authority...

By Robert Mullin CAISO has released a revised set of principles for governing a Western RTO in a bid to convince skeptics that an expanded ISO will be amenable to the entire region. The new document won initial praise, although doubts remain. The ISO’s governance changes seek to address the...

By Robert Mullin Utah lawmakers plan to draft a bill requiring PacifiCorp to gain legislative approval before joining an RTO based on an expanded CAISO. Members of the Public Utilities, Energy, and Technology Interim Committee approved a motion to create the proposed law July 13 after listening to more than...

By Robert Mullin CAISO’s expansion into a multistate, regional electricity market could save California ratepayers as much as $1.5 billion annually while helping the state to meet or exceed its 2030 emission-reduction goals, according to a study commissioned by the ISO. California’s Clean Energy and Pollution Reduction Act — the...

By Robert Mullin FERC on Thursday rejected CAISO’s proposal to prohibit Energy Imbalance Market participants from implementing economic bidding at the market’s external interties until the ISO can develop “appropriate rules and procedures” to manage the transactions (ER16-1518). The ISO’s Tariff currently stipulates that each balancing authority area (BAA) that...

By Robert Mullin CAISO’s Board of Governors on Tuesday appointed five members to serve on the newly established governing body of the western Energy Imbalance Market. Candidates were selected after being vetted by a nominating committee representing five industry sectors, including EIM entities, ISO participating transmission owners, power suppliers and...

By Robert Mullin CAISO last week stepped up efforts to convert skeptics of a Western RTO, convening a forum in Denver to discuss a proposed set of governing principles and dispel concerns that California interests would dominate a West-wide entity. “What we’re doing actually matters, and it has enormous upsides,”...

By Robert Mullin Pacific Gas and Electric said Tuesday it will shut down California’s last nuclear power plant in 2025 under an agreement reached with a coalition of environmental, labor and anti-nuclear groups. The utility said it will develop a portfolio of renewable resources, energy efficiency and energy storage to...

By Robert Mullin Concerned that large numbers of gas-fired generators will retire early because of competition from lower-cost renewables, CAISO last week proposed a study to identify the most vulnerable units in its balancing area. The initiative to gauge the risk of “economically driven” retirements is a result of California’s...