The Research And Realization Of Visual Protection Ralay Coordination Based On GIS In Distribution Network

With the development of power system, the scope of distribution network also enlarged increasingly, and the mode of connection and operation is more and more complex. So the relay protection setting of distribution network becomes an important work. People are used to do protection setting calculation by hand, which not only causes great workload, but also brings artificial error easily. Research relay protection setting in distribution network is to set people engaged in this filed free from their boring work and improve their efficiency and reliability of setting calculation.The existing relay protection setting software is the same with high-voltage power network, but makes not use of distribution system of 10kV. Moreover, the existing software often operates independently, devoid of effective connection with GIS established in distribution network, which results in a great deal of repeated modeling work. This condition cannot realize the share of data. On the contrary, it brings much discommodity to field management. Therefore, considering the actual requirement of protection in distribution network, it is very important actual meaning to research and design visual relay protection setting management software based on GIS in distribution system.Through analyzing the basic data characteristic of GIS and the basic information of distribution relay protection setting system, it provides a method for data translation and modeling based on GIS. According to missionary's abundant hand-on background, people associate setting principle with actual operating condition in Xuzhou power system, and generalize a suit of relay protection setting method of distribution network. People design the data-structure using object-oriented idea, analyze protection setting by data flow diagram method, and set up rather reasonable software structure. Embedded analyzing integer design of software, people specifically realize all kinds of function, including distribution modeling, protection collocation, setting calculation in different operation modes and system management.Visual relay protection setting software in distribution network is provided through a great deal of research, which has great practical value. The software bases on GIS, consequently avoiding a mass of hand modeling. It has friendly man-machine interface and convenient operate characteristic, widely applied in relay protection setting calculation and setting value management in distribution network and so on. At the present time, this software has been used in Xuzhou power company.