Single-phase voltage source dc-ac power converter and three-phase voltage source dc-ac power converter

A single-phase voltage source DC-AC power converter comprising:

• a single-phase voltage source DC-AC power converting circuit that having a gate signal generator that detects a single-phase AC output current at an AC terminal and that generates gate signals for making values of a PWM command and the single-phase AC output current identical, and a single-phase voltage source DC-AC power converting unit converts power from a DC voltage source into single-phase AC power according to pulse width of the gate signals, and outputs the single-phase AC power from an AC terminal;
• and
• target current producing means that includes a filter voltage command device and a voltage controller, the filter voltage command device generating a filter voltage command value that is a reference of the single-phase AC power output from the AC terminal, the single-phase AC output voltage at the AC terminal being input as an input signal to the voltage controller, the voltage controller including an integrator which integrates a difference between the filter voltage command value from the filter voltage command device and the single-phase AC output voltage at the AC terminal and specifies an internal equivalent impedance of the single-phase voltage source DC-AC power converting circuit, the target current producing means outputting the PWM command that is a current value such that a DC component included in the single-phase AC output voltage at the AC terminal becomes zero.