Western Interconnection

The Federal Energy Regulatory Commission (FERC) has unanimously approved the California Independent System Operator’s (CAISO’s) Day-Ahead Market Enhancements (DAME) and Extended Day-Ahead Market (EDAM) proposal, effectively allowing new market options to address challenges caused by increasing system variability and uncertainty in the West. FERC’s decision issued on Dec. 20, for the most part, accepts CAISO’s […]

The Southwest Power Pool (SPP) is poised to become the first regional transmission organization (RTO) to provide coordinated operation across the Eastern and Western Interconnections, bridging a historic gap to potentially boost regional reliability, savings, and efficiencies. SPP, which has operated as an RTO since 2004, currently has 110 member companies in its Eastern Interconnection […]

The Western Energy Imbalance Market (WEIM), a real-time energy market operated by the California Independent System Operator (CAISO), has gained three new participants, including its first generation-only entity. CAISO on April 5 announced the Western Area Power Administration (WAPA) Desert Southwest region, El Paso Electric (EPE), and AVANGRID have formally begun participation in the WEIM. […]

Utilities across the Pacific Northwest are bracing for exceptional stress on the grid as record-breaking temperatures continue to fester across the region, and at least one utility—Avista Corp.—this week began rolling outages as a measure to alleviate strain on the electric system. Despite pleas to customers to reduce their power consumption, Avista, which supplies power […]

The U.S. power system is separated into three major components—the Western Interconnection, the Eastern Interconnection, and the Electric Reliability Council of Texas. The three operate almost independently