PROTECTION AND CONTROL SYSTEM, AND MERGING UNIT

摘要

A protection and control system includes a first merging unit which obtains an electric variable from a transformer installed in an electric power system, and digitally converts the obtained electric variable to output the converted electric as first electric variable information to a network, and a plurality of protection and control devices, each of which obtains the first electric variable information from the first merging unit through the network, judges whether or not a system fault occurs in a zone to be protected of the electric power system based on a predetermined relay characteristic, and outputs main trip information to the network when that the system fault occurs is judged, wherein the first merging unit judges whether or not the system fault occurs in the zone to be protected.

主权项

1. A protection and control system, comprising:
a first merging unit which obtains an electric variable from a transformer installed in an electric power system, and digitally converts the obtained electric variable to output the converted electric as first electric variable information to a network; and a plurality of protection and control devices, each of which obtains the first electric variable information from the first merging unit through the network, judges whether or not a system fault occurs in a zone to be protected of the electric power system based on a predetermined relay characteristic, and outputs main trip information to the network when that the system fault occurs is judged, wherein the first merging unit judges whether or not the system fault occurs in the zone to be protected of the electric power system based on the first electric variable information, and a plurality of the relay characteristics which are predetermined as respective fault detection relays of the protection and control devices, holds FD trip information when that the system fault occurs is judged, and judges opening or closing of a circuit breaker or a switch which is installed in the electric power system based on the FD trip information and the main trip information.