| 摘要 |
PURPOSE:To make the electric power charge lower for commercial power supply even through power from a commercial power source is supplied to loads having high degrees of importance after power interruption of non-utility generated power. CONSTITUTION:A load 4 of non-utility generated power connected to a private power generating equipment 1 is constituted by a high importance load 5 and low importance load 6. Commercial power loads 12 connected to a commercial power supply 9 are constituted by a high importance load Q10 and low importance load Q11, and the total value of the load power is set to a value smaller than the power of standing change. The load power of the high importance load 5 at the non-utility power generation side is set to the value less than the load power of low importance load Q11 at the commercial side. A power receiving portion 10 of the commercial power supply 9 is selectively connected to the low importance load Q11 and high importance load 5 through a backup power distribution line 14 and a backup change-over device 15. |
