| 摘要 |
PURPOSE:To reduce voltage fluctuation in load feed, to prevent the operation fault of a load side equipment and to improve profitability by lengthening the distance of a DC electric wiring and shortening a wiring distance between an inverter having a voltage control function and load. CONSTITUTION:The AC power of an AC input power supply 11 is converted into DC power by a rectifier 12, the DC power is DC-distributed into each inverter 161-163 by a DC bus 15, and DC power is inverted into AC power by each inverter 161-163. Each inverter 161-163 is changed into inverters, in which output voltage can be controlled, by known PWM control, etc., thus turning AC power supplied to each load 171-173 from each inverter 161-163 into stabilized AC power, in which voltage fluctuation is inhibited. When a momentary voltage drop, service interruption, etc., are generated in the AC input power supply 11, the DC power of a battery 13 is fed in place of the output power of the rectifier 12, and each load 171-173 can continuously be supplied with uninterrupted AC power. |
