Research Of Expert System On Relay Protection Setting Calculation

As artificial intelligence and computer technology development, power systems relay protection setting calculation, the use of computer technology and artificial intelligence technology to replace traditional section has attached great importance by relay protection workers. To the need for modern protection setting, combined the experience and requirements of power running department. The paper research and design new relay protection computer-aided software-- relay protection setting calculation systems, and makes detailed discussions on functions structure and develop methods of the software modules.The paper analyses the application of expert system in relay setting calculation on the basis of understanding the working principle,characteristics and functions. It mainly researches the construction of knowledge base,the principle and reasoning process of inference engine in the expert system. Setting calculation expert system builds the production rules and framework for the main structure of knowledge representation system,using a precise search forward reasoning control strategy can be a simple value the protection of the whole calculation. At last, adopt the related rules of the setting calculation and practical interpretation of a computation process, result is transparent and credible.Setting design expert system by PowerBuilder 9.0 programming interface,the interface can be more intuitive. Friendly man-machine interface can be operated easily,and it run fast.