The California Independent System Operator's ("Cal-ISO") Board of Governors recently voted to move forward with a proposed Energy Imbalance Market ("EIM"), with the aim of encouraging Balancing Authority Areas ("BAAs") from across the West to participate in real-time energy imbalance market operated by the ISO. The market design approved by the Cal-ISO Board of Governors is scheduled to begin operation in October 2014. Consistent with an earlier agreement, PacifiCorp and the Cal-ISO would be the initial participants, but the market design approved last week is meant encourage the West's other BAAs to join the EIM. Ultimately, the aim is to create optimal real-time dispatch of generation resources across the EIM footprint, and thereby to reduce dispatch costs and improve the region's ability to integrate variable renewable resources like wind and solar into the electric system.
Under the Cal-ISO's plan, the EIM will be integrated into the Cal-ISO's real-time market. The ISO is now in the process of implementing a real-time market featuring 15-minute scheduling and five-minute dispatch. This market is being developed in response to the Federal Energy Regulatory Commission's ("FERC") Order No. 764, which, among other measures, required adoption of 15-minute scheduling as a means to improve integration variable renewable resources such as wind and solar. The ISO plans to implement this new market structure in the spring of 2014, and will use this structure as the basis of the EIM. Balancing Authorities participating in the EIM will then be able to voluntarily offer resources into the EIM and the ISO will use its 15-minute scheduling and five-minute dispatch programs to efficiently dispatch balancing resources and transfers between balancing authorities across the EIM/ISO footprint. Participants will also submit schedules 75 minutes before the operating hour. These will serve as the load forecast and the base schedule against which balancing resources will be dispatched.