Fault Diagnosis of 3/2 Breaker Scheme In Substation Based on Petri Net
In substations of power system,3/2 Breaker Scheme are used commonly.Its protective relay configuration is complex,There is a lot of information when the fault occurs,especially when the protective relays and circuit breakers fail to work,how to determine the fault element is particularly intricate.In view of features of 3/2 Breaker Scheme Fault Diagnosis,this paper put forwards a new fault diagnosis method based on fault associated tree.In this new fault diagnosis method,the fault associated tree is defined to describe the time-space properties logic according to the relay protection logics cooperation,which is created for every possible fault primary component according breakerprimary component association.Then the action priority of protections and breakers are sorted according to their priorities and mapped to the dynamic model of the Petri net,which avoid the rings of 3/2 Breaker Scheme.The proposed model could not only estimate the fault section,but also identify the malfunctioned Protective Relays and Circuit Breakers as well as the missing and/or false alarms.The simulation results given in this paper illustrate that this fault diagnosis method can make a rapid diagnosis and give the accurate evaluation about the 3/2 Breaker Scheme faults.
3/2 Connection Mode:Fault diagnosis:Petri net Fault associated tree:Malfunctions of Protective Relays and Circuit Breakers
ZHANG Tao CHEN Qing GAO Zhanjun
School of Electrical Engineering Shandong University Jinan,China
国际会议
威海
英文
348-352
2011-07-06（万方平台首次上网日期，不代表论文的发表时间）