PHOTOVOLTAIC POWER GENERATING SYSTEM AND METHOD

A photovoltaic power generating system includes a plurality of photovoltaic strings including a plurality of photovoltaic modules connected in series, an inverter that converts direct current supplied from the photovoltaic (solar cell) strings into alternating current and transmits the converted current to a power-consuming device, and a controller that determines whether a ground fault occurs in each of the photovoltaic strings on the basis of actual open-circuit voltages of the photovoltaic strings, and electrically disconnects a faulty photovoltaic string in which the ground fault occurs among the plurality of photovoltaic strings from the inverter.