Система управления устройством ограничения высших гармоник, создаваемых трехфазными электродуговыми печами

Abstract

A control system has been developed for a device for limiting harmonics of higher order (GWP) voltage created by electric arc furnaces (EAF). To limit (suppress) the HWP in each phase, a device is provided that consists of three sets of filters tuned to a specific frequency of the EAF operation mode (short circuit-arc-pause burning). The devices of each phase are controlled by means of monitoring the values of the current passing in the electrode and the voltage of the arc gap. During the operation of the furnace, the control system connects to the network the set of filters of the hot water supply limit device necessary at that time.