POWER CONVERTER

摘要

A maximum single phase inverter (3B-INV) whose DC power supply voltage is the DC voltage V_3B generated by stepping up a solar voltage by a step-up chopper circuit (3) is disposed at the central position, and single-phase inverters (2B-INV, 1B-INV) to which power is inputted from DC power supplies (V_1B, V_2B) supplied with power from the maximum DC power supply (V_3B) are arranged on both sides of the maximum single phase inverter (3B-INV). The AC sides of the single phase inverters are connected in series, and the sum of the generated voltages of the single phase inverters is used as the output voltage, thus constituting a power conditioner. Chopper circuits (7a, 7b) are connected between the maximum DC power supply (V_3B) and the DC power supplies (V_1B, V_2B), and power is supplied from the maximum DC power supply (V_3B) to the DC power supplies (V_1B, V_2B) through switching elements in the single phase inverters.