Patent ID: 6198402
Filing Date: 2001-03-06
Classification: H02H

Abstract:
An electric power system protection and control system, comprising:a plurality of protection controllers, each for executing protection and control of an electric power system by inputting a status quantity; anda power system monitoring and control host connected to each of said protection controllers via a communication network, for monitoring and controlling an operation of said power system based on information sent from said protection and control terminals;each of said protection controllers comprising:a correlation processing unit having a CPU and a memory unit, which are connected within the protection and controller, the correlation processing unit correlating the operation state changes of two-way switch operations and protective relay operations, facilitating accurate time-point stamping of state change data and eliminating any order switching between relay and CB operation state changes; andsending means for sending result of said correlating means to said protection and control terminals via said communication network, respectively; andsaid power system monitoring and control host comprising:receiving/displaying means for receiving said result of said comparing means via said communication network and displaying said result of said comparing means.