PROTECTION CONTROL SYSTEM PROTECTION CONTROL DEVICES AND MERGING UNIT

摘要

The purpose of this embodiment is to provide a protection control system protection control devices and a merging unit wherein the protection control system which uses a process bus uses a reduced amount of hardware. The protection control system in this embodiment is provided with the following: a merging unit that outputs charge amount information; a plurality of first protection control devices that each output main trip information on the basis of the charge amount information and predetermined relay characteristics; and a second protection control device that outputs FD trip information on the basis of the charge amount information and the predetermined relay characteristics for an accident detection relay in each first protection control device. Furthermore the merging unit uses the main trip information and the FD trip information to determine whether or not to open a circuit breaker or switch installed in the power system.