POWER CONVERSION APPARATUS, GRID CONNECTION APPARATUS, AND GRID CONNECTION SYSTEM

摘要

A power conversion apparatus is provided with an inverter circuit, an output short-circuiting circuit, and a control circuit. The inverter circuit comprises a first inverter switch that is configured so as to generate a first polarity voltage from DC voltage, and a second inverter switch that is configured so as to generate a second polarity voltage from the DC voltage. The output short-circuiting circuit comprises a first short-circuiting switch that is configured so as to short-circuit a power supply line that outputs the first polarity voltage, out of a pair of power supply lines, and a second short-circuiting switch that is configured so as to short-circuit a power supply line that outputs the second polarity voltage, out of the pair of power supply lines. Upon switching the polarity from the first polarity to the second polarity, the control circuit turns off the first short-circuiting switch before the timing whereby the second inverter switch is turned on.