The Western Electricity Coordinating Council’s primary remedial action scheme (WECC-1 RAS) fails to account for emerging south-to-north power flows across the regional grid, a gap that Bonneville Power Administration dispatcher Chris Sanford flagged as a reliability concern during a Western Market Seams workshop. As renewable generation and shifting load patterns rewrite traditional flow dynamics, the protection scheme designed for a different era may not adequately protect the system against evolving operational realities.
WECC-1 RAS was built around the historical north-to-south flow paradigm — hydropower from the Pacific Northwest moving toward California and the Southwest during peak periods. That architecture made sense when the resource mix was dominated by large hydro and thermal plants with predictable seasonal patterns. Today, the rapid expansion of solar across the Desert Southwest, wind development in Wyoming and New Mexico, and battery storage deployments throughout the region have created significant reverse flows during shoulder months and midday hours, periods the existing scheme does not explicitly address.
The reliability implication is not theoretical. Remedial action schemes are the grid’s automated safety net, designed to detect specific contingency conditions and trigger pre-programmed responses — generation tripping, load shedding, or switching actions — within cycles. If the scheme’s logic does not recognize a valid contingency because the flow direction falls outside its programmed parameters, operators lose a critical layer of defense. Sanford’s warning reflects frontline operational experience: the tools available to dispatchers must match the physics of the system they operate.
This technical gap underscores a broader structural challenge for Western energy markets. The region’s fragmented market design — bilateral trading, the Energy Imbalance Market, and the emerging Extended Day-Ahead Market — operates across seams that were not designed for today’s flow complexity. As states pursue divergent clean energy policies and resource portfolios diverge, the physical grid increasingly operates as a single integrated machine while market and planning frameworks lag behind. Addressing the WECC-1 RAS blind spot will require coordination among WECC, BPA, CAISO, and other balancing authorities, but it also signals that reliability planning must evolve in step with the resource transition.
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