Comparative analysis of static VAR compensator control modes for high power electric arc furnace

The paper deals with the main results of comparative analysis of static var compensator (SVC) control modes, which are used in electric power system of high and ultra-high power electric arc furnaces (EAF). Traditional SVC control modes designed for implementation of zero reactive power consumption of the steel-smelting complex and voltage stabilization at the common connection point of EAF and SVC are considered. In addition, this paper describes the developed mode, which maintains a constant active power of an electric arc furnace. The effects of supply main parameters and SVC control modes on the EAF electrical characteristics are investigated with a mathematical model of the EAF-120 and SVC-100 MVAr steel-smelting complex developed in the Matlab’s Simulink application. Thus, advantages and disadvantages of the discussed SVC control modes are determined and main recommendations for their application are given.