Reliability Analysis of Intelligent Substation Relay Protection System in Power Industry
In order to evaluate the operation status of an intelligent substation and eliminate potential fault hazards,the research process uses the GO method to calculate the reliability of the relay protection system of a 220kV intelligent substation.The application principle of this method is to draw operators and signal flows,construct GO diagrams,calculate the success rate of operators and signal flows,and then find out the reliability and average failure time of the system bus protection,main transformer protection and line protection.Combined with the actual situation of this substation,the calculation results show that the overall reliability is higher when the electrical structure of the relay protection system is simpler.Conversely,if there are more circuit breakers,intervals or other nodes in the system,the reliability is lower.
万方数据
维普
