A NEW METHOD FOR POWER SYSTEM FAULT DIAGNOSIS BASED ON POWER SUPPLY INTERRUPTED REGION
SUN Wei,LI Lin-chuan,LU Qing-cong,LIU Xia (School of Electric Engineering andAutomation,Tianjin University,Tianjin 300072,China)
A new method to diagnose the faults in power system is presented based on the power supply interrupted district(s). In the presented method following contents are included, they are: (1) A method to identify the district(s) where the power supply is (are) interrupted is proposed according to the information of protective relays and circuit breakers, so the fault diagnosis is confined within one (or some) small district(s); (2) A new integer 0-1 programming model is constructed to identify the faulty elements only in the power supply interrupted district(s) according to the information from dead elements and the actions of circuit breakers and protective relays, so the fault diagnosis speed can be obviously improved because this model is simple and easy to solve; and (3) The greedy algorithm is applied to solve the fault diagnosis model. The results of calculation examples show that the presented mathematical model is correct and the on-line application is prospected.