| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a reverse power flowing to an AC power system when a power conversion device is anomalous with respect to a testing device with an interconnection inverter device as a dummy load for testing the operation of a DC power supply including the power supply device for converting an AC power into a DC power and an auxiliary power supply device. <P>SOLUTION: The testing device includes, as a dummy load, an inverter device 20 that converts the DC power from a DC power supply 10 into the AC power. The inverter device 20 operates as an interconnection inverter device under control of a controller 30 and returns the generated AC power to an input path from an AC power system. The regeneration path 21 for returning the AC power to the input path is provided with an AC switch 22 and the input path is provided with a reverse power flow detection circuit 50. The output path for AC power extended form the inverter device 10 to the AC switch 22 is provided with a switch 62 for connecting an AC load 60. When a reverse power flow is detected, the reverse power flow detection circuit 50 outputs a command signal to a firing circuit 39 and a switch drive circuit 64 to switch the AC switch 22 into an off-state and the switch 62 into a closed state. <P>COPYRIGHT: (C)2011,JPO&INPIT |
