Single Ended Fault Location of Double Circuit Lines Based on Traveling Wave Saltation Along the Line

The key of single ended traveling wave location is the identification of the reflected wave of fault point (or the reflected wave of end bus), The traditional traveling wave fault location method only uses the one dimension time information which caused by fault traveling wave, and the fault traveling wave is not easy to detect and identify for the traveling wave data which is rich in the interfere. The one-dimensional information of fault traveling wave in time domain of the reverse current wave for double circuit lines is mapped to the abrupt change caused by superposition of forward traveling wave and backward traveling wave. According to the relationship between the saltation point and the fault location, and the time constraints and length constraints satisfied, the saltation points that reflect the position of the fault and reflect the dual position were identified, and the fault location result was obtained. A large number of measured data show that: The range affected by the reflected wave from the sound line positioned the measuring end of the fault location algorithm is less than the traditional single end traveling wave algorithm, and the "detection function" can be adapted to different fault conditions by the fault signal itself, so the fault traveling wave can be identified more easily, and the single end automatic traveling wave fault location for double circuit lines is realized. © 2019 Chin. Soc. for Elec. Eng.