This research constructs the time-frequency matrix of the bus voltage and the main transformer low-voltage side cur-rent waveform,and uses SVD technology to extract the singular spectrum of the waveform,and then obtains key parameters such as the singular spectrum mean that represents the singular value size and the singular entropy that describes the signal complexity as a feature vector.Through simulation and actual testing,it was verified that the identification accuracy of this method exceeds 90%un-der various typical conditions,proving its effectiveness,adaptability and practicability in identifying various fault types.
关键词
配电网故障/时频矩阵/奇异值分解/多级支持向量机
Key words
distribution network faults/time-frequency matrix/SVD/Multilevel SVM
维普
万方数据