Control algorithm for an active ground fault current compensator in ungrounded distribution networks

Single-phase ground fault is one of the most frequent faults in distribution networks. Despite the ability of the continuous operation with a sustained fault, the ground fault current is to be compensated until it would be cleared or self-cleared. This work proposes a control algorithm for an active ground fault current compensator. The algorithm is based on the system decomposition into positive, negative and zero sequence. The ground fault current value determination procedure is discussed. The synthesis of the proposed algorithm, the controller tuning process and simulation results are presented.