THE APPARATUS COMPENSATING GROUND CURRENTS CONNECTED TO A TRANSFORMER NEUTRAL POINT

摘要

The apparatus represents a controlled current source (1) that is connected in-between a transformer neutral point (3) and the earth potential. It works not only as a compensator of ground fault currents and higher harmonics of fault currents at the point of the ground fault but is also used for compensating phase non-symmetry during a trouble-free state of the distribution system. The function of a controlled current source (1) may be performed for example by a voltage source inverter, current source inventer or frequency converter.