Research On Power System Fault Diagnosis Method Based On FRD And Development Of FRD Analysis Software

The present diagnosis methods based on switch and protection messages can not provide the satisfactory result while the complex fault occurs in the power system or uncertain factors appear, such as mal-operation,non-operation and missing messages on account of channel disturbance, so using a new source of information is necessary. With the development of the network of protections and fault recorders, the further diagnosis can be carried out in the light of the ample recorded fault data. According to the current running and coming development of the Electric Power System, this paper presents a reasonable approach using collection information for Hierarchic Fault Diagnosis. Under the circumstance of complex fault, it is highly important how to do further diagnosis with the help of recorded fault data. A method of virtual protection is put forward, and the corresponding generally diagnostic model is established. This method effectively makes up the limitation of diagnosis with only switch and protection information. In this paper, A universal and sharing diagnosis system is developed by Microsoft COM and Windows dynamic link library (DLL) technology.With the network of Fault Recorded Data accomplished, the management and analysis of FRD are very necessary. This paper describes a new fault location algorithms using fault type, and deduces the fault location formulas of all fault types. The FRD analysis software is developed by COM technology, realizing the functions such as FRD database management,data formation translation,data analysis(harmonic wave analysis,sequence analysis,Fault location). The paper tests the complete set of software with EMTDC.