Power conversion system

A power conversion system comprising:

• a power conversion device which works to convert power delivered from a power source into power supplied to a stationary load;
• and
• a controller which works to control an operation of the power conversion device, wherein
• the power conversion device includes a three-phase full-bridge circuit to which a dc power is inputted,
• the three-phase full-bridge circuit includes a first leg, a second leg, and a third leg which correspond to a first phase, a second phase, and a third phase, respectively, and are connected in parallel to each other between a high-potential line and a low-potential line,
• each of the first, second, and third legs includes an upper-arm switch and a lower-arm switch which are connected in series with each other,
• one or two of the first to third legs of the three-phase full-bridge circuit have midpoints connected through reactors to a power supply wiring for the load,
• the controller includes a first controller and a second controller,
• the first controller receives inputs of a pseudo torque command signal, as derived from an output command signal, and a phase angle signal, as derived from a detection signal indicative of the supplied power, to control a switching operation of the power conversion device, and
• the second controller works to produce and output the pseudo torque command signal and the phase angle signal to the first controller.