信号距离度模型及其波形复杂信号辨识

Signal distance degree model and identification for complicated waveform signal

针对快速辨识波形奇异、变化复杂的信号的要求,构造了表征离散信号差异性的信号距离函数、信号距离度函数,给出了信号距离的性质,定义了多元素信号集的距离度空间、距离度矩阵,最终建立了算法简单的信号距离度模型体系。在电网故障暂态电流的辨识选线中应用的实例,证明了信号距离度模型的有效性和鲁棒性。实验结果也表明,利用信号距离度模型能够准确的辨识波形复杂的信号,为实用化的系统辨识和故障诊断提供了一种有效途径。

To identify complicated waveform signals,the signal distance function and signal distance degree function which can describe the difference of discrete signals are constructed,properties of signal distance,distance degree space and distance degree matrix of multi elements set are presented.Then the signal distance degree model system is obtained,its algorithm is simple.This signal distance degree model is successfully used to fault line discrimination of distribution network through identifying transient zero sequence current,this example proves the validity and anti-interference of signal distance degree model.The simulation and test results show that the complicated waveform signals can be discriminated accurately by signal distance degree model,and it provides a practical approach effectively for system recognition and fault diagnosis.