Energy Imbalance Market Year 1 Enhancements
The second phase of the Energy Imbalance Market (EIM) enhancements initiative will address the potential of an EIM-wide transmission rate, flow entitlements for base and day-ahead schedules, the treatment of transfer limit congestion, market power mitigation of transfer limits, and bidding rules on external interties. The initiative also includes items that were discovered during EIM implementation.
Outcome
Phase 2
System changes implemented on October 1, 2016 (1) address differences between EIM transfer limits and the scheduling limit; (2) provide dynamic competitive assessment for market power mitigation of EIM transfer limits;
(3) limit EIM transfers into an EIM Entity Balancing Authority Area and subject them to the market power mitigation process; and (4) establish the standard base schedule treatment for e-Tags.
Phase 1
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.
Initiative status
Phase 2
Implementation: October 1, 2016
FERC approval: September 15, 2016
Tariff amendment filing: April 28, 2016
Board of Governors approval: November 4, 2015
Phase 1
Implemented: October 2015
FERC approval: February 3, 2016
Tariff amendment filing: June 15, 2015
Board of Governors approval: March 26, 2015
Transition period
FERC approval: October 29, 2015
Tariff amendment filings: August 28, 2015, January 15, 2015
Board of Governors approval: January 5, 2015
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WEIM year 1 enhancements phase 1
Phase 2
Implementation
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FERC filings and orders
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Apr 28, 2016 Tariff amendment - Energy Imbalance Market enhancements - phase 2 (ER16-1518)
Tariff development
Policy development
Phase 1
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.
Transition period