Energy Imbalance Market year 1 enhancements phase 1 (completed)

Outcome: In October 2015, the ISO implemented a greenhouse gas (GHG) flag and cost-based GHG bid adder, which enhanced the capacity test to cover potential imports and exports not tagging to base schedules and used available transmission capacity for Energy Imbalance Market transfers. The administrative pricing rules were also clarified. These improvements met FERC compliance requirements and facilitated NV Energy’s participation in EIM. — Implemented: October 2015; FERC approval: Feb 03, 2016 (ER15-1919); Tariff amendment filing: Jun 15, 2015 (ER15-1919); Board of Governors approval: Mar 26, 2015

The ISO is proposing a series of Energy Imbalance Market (EIM) enhancements for FERC compliance, to meet commitments made during the original stakeholder process and to resolve issues identified during implementation. Phase 1 will focus on improvements that will facilitate NV Energy’s October 2015 entry into the market, which includes creating a greenhouse gas flag, cost based bid adder, bidding rules on external EIM interties and clarifying administrative pricing rules.