The western EIM created nearly US$6 million in benefits and reduced renewables curtailment in first two months of operation.
The western Energy Imbalance Market (EIM), which was launched on November 1, 2014 under an agreement between PacifiCorp and the California Independent System Operator (ISO), has demonstrated demonstrable value.
The western EIM was formed with the addition of PacifiCorp’s two balancing authorities covering portions of six western states, PacifiCorp-East (PACE) and PacifiCorp-West (PACW) to the existing ISO market within California. The states are California, Oregon, Washington, Utah, Idaho and Wyoming.
Analysis of the first two months of operation produced estimated benefits of US$5.97 million, according to the first quarterly report. This is comprised of an estimated US$1.24 million for the ISO, US$2.31 million for PACE and US$2.42 million for PACW.