Design And Realization On The Visualized Relay Protection Setting Calculation System

Relay setting Coordination is the basis of secure operation of modem powersystem，and is of great importance to the reliable function of relays．Sensitivity，selectivity and speed of the protection devices could be guaranteed by the appropriatesettings. Due to the diversity of the power grid operation mode，relay protection settingvalue may not fully meet the requirements of the " Four characteristics".It isunavoidably to cause protection misoperation， and cause the maloperation widespreadblackout accidents， due to the inreliable protection setting value. This paper developeda intelligent relay protection setting calculation software and data management system，that applying to power grid，providing users with a friendly interface，practical settingcalculation software platform. It strives to ensure that the system has visualization，versatility， and maintainability， making relay protection setting calculation softwareon the function to be more perfect.This paper first decides the setting calculation software designing thought，functional division， the system structure and development environment. It expoundsthe design idea of the system and overall structure characteristics， And introducesthe system maintenance module， fault calculation module， setting calculation moduleand value simulation verify modules of the system.At the same time，the power relay protection setting value online calibrationsystem were introduced in detail. Through the introduction of the basic principle of thesimulation， It uses the idea of combining the logical judgment method and the valuejudgment technique to design and programming the simulation program. Then from theangle of practicality， Throughout the expounding of the power grid resources entry，simulation Settings， the simulation process， the function process， and the simulationreport， the function of the Simulation validation module is realized.