Power conditioner comprising curve tracer and curve evaluating method for curve tracer

摘要

The present invention is applied to a photovoltaic power generation system 1 comprising a solar battery system 2 provided with a plurality of solar battery modules 6 disposed in series and in parallel, a connection box 3, and a power conditioner 4 for converting a direct-current power PX into an alternate power synchronizing with a frequency (50Hz /60Hz) on a system side (commercial power supply) and an alternate voltage. In a state where the photovoltaic power generation system 1 is actually installed, a DC current IX - direct-current voltage VX curve or a direct-current power PX - direct-current voltage VX curve is displayed on a screen so as to measure if the solar battery system 2 supplied to the power conditioner 4 is in a normal state or an abnormal state.