New Single Ended Fault Locator for HVDC Lines

This paper presents a single-ended method for fault location (FL) in HVDC transmission line, when one terminal measurement data is used without using communication channel or synchronization links between two terminals. The technique is based on extracting traveling wave (TW) impulses from measured transients and its comparison with so called finger print (FP) i.e. referenced time schemes of TW impulses obtained by a use of banks of many Bewley's lattice diagrams of TW impulses related to different fault location. The method can be applied for homogenous line as well as for mixed cable-overhead line. The method was validated using PSCAD models of overhead line and segmented line. Presented results shows that the method is valid and capable for locating the faults and introduce new solution for single-ended technique in homogenous or segmented HVDC transmission lines.

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