Members of the Energy Imbalance Market (EIM) saw increased savings and profits with the addition of Puget Sound Energy and APS.

Arizona Public Service (APS) can continue to charge market-based rates in Tucson Electric Power’s balancing authority area, FERC ruled.

FERC accepted transmission calculations submitted by Southwestern transmission-owning utilities in support of their requests for market-based rates.

The Energy Imbalance Market (EIM) experienced a “dramatic uptick” in failed ramping capacity tests in November and December, the CAISO IMM reported.

CAISO rang in 2016 with a strong push to expand its EIM into PacifiCorp’s sprawling service territory, but the project hit a stumbling block by mid-year.

Increased transfer capacity is keeping a lid on congestion in the EIM and limiting participants’ ability to wield market power, according to CAISO’s IMM.

The Seattle City Council authorized Seattle City Light to conduct a cost-benefit analysis on joining the Western Energy Imbalance Market (EIM).

PacifiCorp reaped well more than half the $26.16 million in gross benefits yielded by the Energy Imbalance Market (EIM) in the third quarter, CAISO said.

Last week's FERC technical conference on the EIM began on a contentious note but concluded with participants understanding each others’ perspectives.

The entry of Arizona Public Service and Puget Sound Energy into the Western Energy Imbalance Market went off without a hitch, according to CAISO.