Western Energy Imbalance Market (WEIM)

PacifiCorp
Northwest Summers Now Include ‘Huge’ Energy Flows from California

Portland General Electric told Oregon regulators that after decades of electricity flowing from north to south through its system during the summer, the flow on a typical summer day has reversed.

CAISO
Inland Wind, Merchant Projects, WestTEC to Guide CAISO Interregional Planning
Out-of-state wind integration, merchant transmission development and the WestTEC planning effort are all factors influencing CAISO’s interregional transmission planning.
CAISO
Panel Ponders Impacts, Priorities Around Western Market Seams

The formation of two competing day-ahead markets will create seams across the West, but at least one utility representative is more worried about seams resulting from the fracture of CAISO’s real-time Western Energy Imbalance Market.

Seattle City Light
Former Seattle City Light CEO Nominated for WEM Governing Body

Former Seattle City Light CEO Debra Smith has been nominated to join the Western Energy Markets (WEM) Governing Body, with a three-year term to begin July 1. 

The Imperial Irrigation District
Imperial Irrigation District Inks Agreement to Join CAISO Markets
CAISO said the Imperial Irrigation District has signed implementation agreements and will begin participating in the WEIM and EDAM in 2028.
CAISO
CAISO Postpones EDAM Congestion Revenue Decision
CAISO delayed its final decision on how to allocate congestion revenues in its Extended Day-Ahead Market after receiving comments from stakeholders asking for more analysis.
© RTO Insider 
Debate Lingers After BPA Day-ahead Market Decision
Though BPA removed any uncertainty by selecting SPP’s Markets+ over CAISO’s EDAM, the debate over whether BPA made the right choice likely will heat up as the West confronts a split into two major markets.
Shutterstock
Puget Sound Energy Inks Agreement to Join Markets+

Puget Sound Energy said it is joining Markets+, marking another win for SPP shortly after the Bonneville Power Administration issued its final market policy in favor of the day-ahead market.

© RTO Insider
NWPCC’s Initial Demand Forecast Sees Sharp Growth for Northwest
Annual energy demand in the Pacific Northwest could reach between 31,000 and 44,000 MW by 2046, according to the NWPCC's initial 20-year forecast.
Pattern Energy
SunZia Gets Mixed Decision on Tariff
FERC approved the non-rate terms of SunZia Transmission’s proposed transmission owner tariff but sent the tariff’s non-subscriber usage rate to a settlement process and potential hearing.

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