| 摘要 |
PROBLEM TO BE SOLVED: To provide a parallel operation system for uninterruptible power supply capable of preventing the generation of power feeding in different modes of a plurality of uninterruptible power supplies with built-in bypass circuits. SOLUTION: In this parallel operation system, one interruptive power supply and the other interruptible power supply having two feeding modes: inverter feeding of conducting feeding with an inverter and bypass feeding of directly feeding AC power supply through an AC switch if the inverter stops are operated in parallel. A driving command of the AC switch of one interruptible power supply is closed while the other interruptible power supply is conducting the inverter feeding. |
