Application of the Phillips-Heffron model in the analysis of the damping torque contribution to power systems by SVC damping control

Abstract In this paper, an extended Phillips-Heffron model of a power system installed with a static VAr compensator (SVC) is established and applied to analyse the damping torque contribution of SVC damping control to the power system. Some basic issues, such as the capability of the SVC damping control to supply positive damping to the power system, the best location of the SVC damping control, its control strategy and its robustness to the changes of the operating conditions of the power system, are investigated. Previous findings from numerical calculations and simulations of the effects of SVC damping control are confirmed by the analytical results in the paper. To supplement the analysis, the results of the calculations and simulations of an example power system are also presented.