METHOD AND DEVICE FOR DETECTING CONDITION OF REVERSE CHARGE FROM DOMESTIC GENERATION FACILITY TO POWER SUPPLY SYSTEM

摘要

PURPOSE: To separate the private generation facility, depending upon the unsound condition of power supply side, so as to prevent a various kind of faults by detecting the condition of reverse charge from the private generation facility installed in the premises of a power consumer to the side of a power supply system. ;CONSTITUTION: An impedance load 22 for detection is connected from the middle position between a private generation facility 12 and a power supply system 10, and this impedance load 2 for detection is turned on or turned off to periodically change the load on the side of the private generation facility 12. With the connection point 24 of the impedance load 22 as the datum point, the variation of the current and or power of the private generation facility 12 and the power supply system 10 is detected for the connection point 24. By the variation, the power loss condition on the side of the power supply system 10 is judged, and the condition of the reverse charge from the private generation facility 12 to the side of power supply system 10 is detected. Accordingly, the condition of the reverse charge from the private generation facility 12 to the side of power supply system 10 can be detected easily.;COPYRIGHT: (C)1994,JPO&Japio