Wavelet Packet Energy Entropy In Single-phase Reclosing With Shunt Reactor Of The Application Of Fault Recognition

In order to make the single-phase automatic reclosure can coincidence in instantaneousfault reliably, to avoid reclosing on permanent fault, improve the reliability of systemoperation, to improve the stability of the transmission line, People hope that single-phaseautomatic reclosure can recognize instantaneous fault and permanent fault.Wavelet packet energy entropy theory is applied in this article, single side and ends withsingle-phase automatic reclosing of ehv transmission lines fault type recognition research. Tohigh voltage transmission line with shunt reactor, under instantaneous fault and permanentfault happens, the voltage at the ends of the shunt reactor and neutral reactor at the ends of thevoltage is different, choose the corresponding band frequency range as the characteristics,using wavelet packet energy entropy on the spectrum, and calculate the voltage at the ends ofthe shunt reactor and neutral reactor on both ends of the voltage signal entropy ratio,and thisratio is defined as the effect of fault type on the system, according to this article to build faultcriterion, fault type identification. By MTLAB software builds a simulation model based ondifferent operation modes, different fault locations, and different transition resistance of thesimulation, the results show that the proposed approach at one end and both ends with parallelreactor fault recognition, the single-phase reclosing can reliably distinguish the fault types,and is not affected by the fault location, the effect of transition resistance and systemoperation mode.