Power distribution network feeder fault type identification method and device

The invention relates to a power distribution network feeder fault type identification method and device. According to the method and device, the transient information of post-fault related electric quantity is mainly utilized to realize fault identification. The method includes the following steps that: waveform sampling data are obtained at first, local feature scale decomposition, Hilbert transform and band-pass filtering are sequentially performed on the waveform sampling data, so that a reconstructed time-frequency matrix can be obtained; and the singular spectrum of the time-frequency matrix is solved, and the distribution parameters of the singular spectrum are extracted so as to construct feature vector matrixes, normalized processing is performed on all the feature vector matrixes, and the normalized feature vector matrixes are adopted as the input samples of a multi-level support vector machine, so that feeder fault type identification can be realized. The power distribution network feeder fault typ