Influence of Photovoltaic Power Plants on Single-Phase Faults in Medium Voltage Electrical Networks

This paper approaches the problem of contributing to single-phase faults of photovoltaic power plants, connected in a medium voltage electrical network, having mixed neutral grounding. The introduction of the photovoltaic power plants into a distribution network may leads to rise many technical problems, therefore, behaviour of such energy sources, under various disturbances, must be studied and known to the distribution grid operators. In this paper, using the ATP program, a medium voltage grid was modelled in the aim to analyse the contribution of photovoltaic power plants to the single line-to-ground faults and to the single-phased short-circuit.