Research On Fixed Value Setting And Design On Management System Of Relay Protection For Power Plan

The relay protection devices are important parts of the secondary electrical power system, and play extremely vital roles in guaranteeing the system's security, stability, economical operation, and so on. Coordination was finished by expert using his hand long time ago, there are some coordination software applied to power plant, but cannot popularize because of its disadvantage in flexibility and utility. So how to enhance the rapidity and accuracy of setting and check to satisfy the request of the modern electrical power system's safe and stable operation will be much significant to ensure the development of power system there.According to the actual situation in power plant and its actual situations of overhaul project also considers a universal protective relaying setting calculation and device management system, then proposes to develop a relay protection setting calculation system which is suitable for the power plant.In order to ensure the complete system functions and correct operation data, this paper implements the overall structure of the system, builds the mathematical model of the system and various component modules, and specifies every module's function.The breakdown calculation is a very important link. The paper introduces the mathematical model of each component, and design the algorithmic process of the three-phase short-circuit and asymmetric short-circuit according to the needs of the relay protection setting calculation for power plant, fault current calculations and the actual feature implementation was carried out in combination with overhaul project.This paper emphasizes on some important relay arithmetic of power plant, and it is useful for the design of relay coordination system. It gives the main processes and structures of program combined the whole process of setting module, incorporating the protecting principle and the setting part of software, realizes fixed value setting calculation function, and practice repeatedly.This paper accomplishes entering database management applying data base technology according to setting calculation and valuation management. Users can manage and inquiries orders and valuation parameters of electrical equipment.