US Patent 10069307 Power conversion device, power conversion system, and power conversion method

A PCS (200) converts the output power from a plurality of distributed power supplies or the supply power to the distributed power supplies. The PCS (200) is provided with a plurality of converters for converting said output power or said supply power. In a first state, the converters convert the respective outputs of the distributed power supplies. In a second state, the converters perform a conversion on the output or input of at least one distributed power supply by using multiple converters.