Fast identification of ancillary service locations for improving hopf bifurcation margin under uncertainties

Abstract

Increasing penetration of renewable energy is posing challenges to stable operation of the power system. An important stability consideration is the small signal stability, which is characterized by Hopf bifurcation. The system operator can use ancillary services to maintain sufficient Hopf bifurcation margin to ensure stability. This work proposes a method to identify the optimum locations for ancillary services to improve Hopf bifurcation margin. The forecast uncertainties related to load and renewable based generation has been handled using boundary power flow based eigenvalue analysis. Simulation studies were performed on WSCC 9 bus system and New England 39 bus system. The accuracy of proposed method is proved by comparing the result with Monte-Carlo method.