CONTROL DEVICE FOR SOLAR POWER GENERATION INVERTER

摘要

A control device (2) for an inverter (1) detects the insufficiency of the output voltage of the inverter (1) on the basis of the system voltage (Vr) of an AC power system (7) and a DC voltage (Vdc) applied to the inverter (1), detects the distortion of output current (Iiv) on the basis of the harmonics contained in the output current (Iiv), and performs a maximum power point tracking control on the inverter (1). When the insufficiency of the output voltage (Viv) is detected and the distortion of the output current (Iiv) is detected, the control device (2) controls the DC voltage (Vdc) applied to the inverter (1) to the voltage corresponding to a power point lower than the maximum power point (Pmpp) used in the maximum power point tracking control.