Relay Setting Calculation Of The Expert System Software

With the power system developing rapidly, the power network scale is enlarging rapidly and becomes more and more complex day by day, more and more complex relay protection installments are disposed in the electrical network, relay protection plays an important role in electrical network safe operation, so the request to the computation and management of the relay protection becomes higher and higher and the workload becomes bigger and bigger. In order to reduce the workload and increase the level of management, the software which can complete all the computation and management work is extremely essential. And it has the vital significance to the general relay protection people.Since on the 90's century, with the computer software technology's fast development and the fault analysis computation technology's maturity, relay protection setting calculation have widely applied software technology to realize electrical network breakdown computation. So, much relay protection software appears, which generally uses the setting principle procedural method. Relay protection setting calculation has the certain setting principle, but when it involves concrete problem, it has localism characteristic. According to actual situation, there has its unique setting coordination and the analysis management rule. Now the artificial factor is playing the important role, however the expert system method is fit for solving the non-formula problem which needs experts' experience. The expert system is an important branch of the artificial intelligence, but it can't describe the accurate objective world origin, the Object_Oriented Programming(OOP) compensates this kind of insufficiency in the certain degree.Basing on existent protection setting software and predecessor's research, this paper gathers traditional value computation and expert system and object oriented method to realize relay protection setting computation's concrete model. A new knowledge expression method is given by analyzing, summarizing setting principles of relay protection. It improves the application level of relay protection software.