Abstract：The generation, transmission and transformation mechanism of fault transient information was deeply analyzed, a single-ended fault location method based on multi-source transient information fusion is proposed. According to the transmission process and the refraction and reflection mechanism of fault transient signals, the time-frequency difference of fault transient signals at different fault locations is qualitatively analyzed. The internal relationship between the fault location and the time-frequency characteristic quantity is revealed. Five typical fault characteristic quantity which can fully reflect the time-frequency difference in transient information are excavated, include arrival time difference, amplitude, polarity, amplitude ratio of high and low frequency voltage and wave velocity of dominant frequency component of each transient surge, the transient information fusion matrix is constructed. The difference of transient information matrix under different fault conditions are analyzed quantitatively, the accurate fault location of transmission line is realized. The proposed method fuse multi-source transient features, which effectively overcomes the heavy dependence of existing fault location methods on accurate extraction of single feature, and has strong fault tolerance performance. Theoretical analysis and a large amount of simulation results show that the proposed location method is less affected by the fault conditions. High impedance fault occurs on the end of the line or the near-zero fault inception angles occurs on the line, the fault location can be accurately located, and with high reliability.
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