Development of SVC control for suppressing voltage fluctuations

This paper describes control methods for a line-commutated static var compensator (SVC) and a self-commutated SVC to suppress voltage fluctuations of electric arc furnaces (EAFs) for steel making. In these control methods, the line-commutated SVC and the self-commutated SVC compensate for the fluctuations of the reactive power effectively within their respective rated capacities. This paper also presents practical examples of both SVCs for suppressing voltage fluctuations. In the actual operation of EAFs and SVCs, the authors verified that each SVC effectively suppressed the voltage fluctuations at the point of common coupling.