| 摘要 |
PURPOSE:To suppress the peak value of electric energy consumption by a method wherein a commercial power supply and a private power supply with power rectifiers are connected in parallel and a DC power is supplied to loads. CONSTITUTION:A power rectifier 21 which converts a commercial power supply 11 into a DC power supply and a power rectifier 22 which converts an AC private power supply 12 into a DC power supply are connected in parallel and DC distribution system loads 83-85 are connected to the power rectifiers 21 and 22. AC system loads 81 and 82 are directly connected to the commercial power supply 11 side. An inverter 71 is provided to convert DC into AC again and a D/D converter 72 is provided to convert the DC system voltage into a required DC voltage. The power rectifier 21 connected to the commercial power supply 11 is subjected to constant voltage control with current minus control while the predetermined value of the power rectifier 21 is so controlled as to have the power of the private power supply 12 side constant by a control circuit 3. With this constitution, economical power management can be realized. |
