DISTRIBUTED POWER SYSTEM AND OPERATION METHOD

摘要

A distributed power system is designed to continuously supply electric power to a load even when a system voltage of the electric power system becomes abnormal. The distributed power system includes a DC/DC converter to convert DC current generated by solar power generation facility to DC current with a predetermined output voltage, and an inverter to convert the DC current to an AC current which is output to an electric power system via a system interconnect switch. When the system voltage of the electric power system is abnormal, a control device makes the system interconnect switch open to switch operation modes of the DC/DC converter and inverter to a self-sustaining operation without stopping, and supplies electric power to a load connected between the inverter and the system interconnect switch.

主权项

1. A distributed power system, comprising:
a DC/DC converter that converts a direct current generated by a solar power generation facility into the direct current with a predetermined output voltage; an inverter that converts the direct current converted by the DC/DC converter into an alternating current, and outputs the alternating current to a electric power system via a system interconnect switch; and a control device that switches operation modes of the DC/DC converter and the inverter, and makes the DC/DC converter and the inverter shift to a self-sustaining operation without stopping the DC/DC converter and the inverter, when a system voltage of the electric power system is abnormal.