Implicitly Modeling Frequency Control within Power Flow

Aayushya Agarwal, Amritanshu Pandey, Marko Jereminov, Larry T. Pileggi

Abstract: In this paper, we extend a circuit-based, current-voltage power flow formulation to include frequency deviations and implicitly model generator primary and secondary control actions as a function of their temporal dependence. This includes extending the slack bus generator model(s) to better represent its true behavior with frequency controls. These implicit models obviate the need for outer iteration loops and improve the robustness of the simulation convergence when frequency deviations are considered. The simulation framework is highly scalable and is demonstrated on 81k+ bus systems.