Photovoltaic power generation apparatus and control method thereof

摘要

A photovoltaic power generation apparatus having a plurality of power converters (21-23), respectively connected to a plurality of solar battery arrays (11-13), for converting direct-current power generated by the solar battery arrays to alternating-current power so as to provide the alternating-current power to a commercial power system. The photovoltaic power generation apparatus is so constructed that the plurality of power converters do not simultaneously suspend operation when an abnormal state is detected, in order to prevent generation of an electrical stress or reduction of the power generation amount caused by simultaneous operation suspension of the power converters or repeated operation suspension and operation resume. When the power generation amount of each solar battery array is different, a power converter connected to the solar battery array of the smallest power generation amount is set in the first-to-suspend condition.