CAISO/WEIM

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By Robert Mullin CAISO has issued a draft final proposal to prevent smaller transmission owners from bearing the high costs for network upgrades needed to interconnect generation serving load outside of their service territories. While the latest revision keeps its focus on the specific circumstances faced by Valley Electric Association,...

By Robert Mullin FERC last week said it will give CAISO more time to address its concerns over intertie bidding at the borders of the Western Energy Imbalance Market (EIM). The commission last June rejected the ISO’s proposal to prohibit EIM participants from implementing economic bidding at the market’s external...

By Robert Mullin FERC last week clarified that it would allow CAISO contracts for transferred frequency response service to include a provision recognizing that counterparties could fulfill the agreements based on an annual measure of performance rather than a case-by-case accounting of responses to frequency disturbance events. In the same...

By Robert Mullin Participants in the Western Energy Imbalance Market (EIM) should not rely on it to reduce their capacity requirements, a CAISO official cautioned last week. Mark Rothleder, CAISO’s vice president for market quality and renewable integration, made the comment when probed on the issue during a Feb. 1...

By Robert Mullin The Western Energy Imbalance Market (EIM) saw total financial benefits grow 8% during the fourth quarter of 2016 with the addition of Arizona Public Service and Puget Sound Energy as participants, according to a report released by market operator CAISO. The EIM generated gross benefits of $28.3...

By Robert Mullin Arizona Public Service can continue to charge market-based rates in Tucson Electric Power’s balancing authority area (BAA), FERC has ruled. The commission said Jan. 30 that APS had overcome its concerns about the company’s ability to exercise market power in the neighboring BAA, closing the book on...

By Robert Mullin In a sprawling decision, FERC last week rejected requests for rehearing by multiple energy sellers implicated in market manipulation during the Western Energy Crisis of 2000/01 (EL00-95-289). The sellers — which include Hafslund Energy Trading, Illinova Energy Partners, MPS Merchant Services, Shell Energy North America and APX...

By Robert Mullin FERC on Wednesday accepted transmission calculations submitted by Southwestern transmission-owning utilities in support of their requests for market-based rates in their balancing areas. But the commission’s approval of the simultaneous import limit (SIL) values provided by the Arizona and New Mexico utilities was accompanied by pointed advice...

By Robert Mullin A new, “expedited” CAISO initiative seeks to establish a process for selecting and procuring black start resources, needed to restore segments of California’s transmission system in the event of regional outages. The effort will follow an ambitious timeline: The ISO hopes to present a plan to its...

By Robert Mullin Two energy sellers that engaged in market manipulation during the Western Energy Crisis of 2000/01 will be prohibited from using the costs associated with illegal trading activity to offset the amount of money they’re expected to refund back to California, FERC has ruled. The commission will also...