Research on the Full Current Compensation of One-Phase-To-Ground Fault
Fang Yong-li · Journal of China University of Mining and Technology · 2003
The reduction of the residual current of the ground-fault point is beneficial to the extinction of the grounding arc and to the reduction of the intermittent arc grounding over voltage. The conception of the full current compensation of one-phase-to-ground fault is that the compensator compensates not only the reactive current of the zero-sequence network, but also the active current of that one, and makes the residual fault-current approximate to zero. Three methods of the full current compensation of one-phase-to-ground fault were put forward: installing on leading phase a inductor in the resistance grounded system; installing a lagging phase capacitor in the resistance grounded system; installing on leading phase a inductor in the inductor grounded system. The full current compensation conditions of these methods were presented. The effects of the regulation error on the residual current of the ground-fault point were analyzed for the full current compensation.