Large Load Performance Requirements

The rapid growth of large power electronics–interfaced loads including data centers, semiconductor and battery manufacturing facilities, hydrogen electrolysis plants, and electrified industrial processes, is creating new operational and reliability challenges for power systems around the world. Unlike traditional industrial loads, many of these facilities exhibit highly dynamic and sometimes unpredictable behavior and can respond to grid disturbances in ways that materially impact system stability. Recent disturbance events in multiple regions have demonstrated that some large loads may rapidly reduce demand, transfer to internal backup supply during transmission disturbances, or exhibit oscillatory behavior, contributing to overfrequency events, voltage recovery issues, and broader reliability concerns. In response, system operators, transmission owners, and regulators are increasingly developing dedicated interconnection and performance requirements for large loads, similar in concept to those long applied to inverter-based resources (IBRs). These emerging requirements typically address capabilities such as fault ride-through, post-fault active power recovery, reactive power behavior, ramp-rate limitations, and power quality performance. The table below provides a snapshot of recently published or draft large-load interconnection and performance requirements from different regions around the world.