We attempt to apply new method for locating fault point by injecting high-frequency short pulse into overhead distribution line. This method, which is called as TDR (Time Domain Reflectometry) measurement, enables to find the fault point easily by measuring propagation time of the pulse reflected due to impedance change at the fault point. In prior research, we have confirmed propagation characteristics of injected pulse through the experiment in test circuit. In this paper, we explain the result of our experiment on TDR measurement in real-scale distribution system. As a result, we confirm the method is able to apply to real-scale distribution system. Moreover, we confirm reflected waves at fault points has different characteristics based on fault type, such as short circuit, grounding, or broken wire.
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