用于行波保护的启动新算法研究

所有微机继电保护装置中都设有启动元件,行波启动元件是超高速保护必不可少的组成部分.文章从度量函数Lipschitz系数的小波理论出发,并结合对行波信号的分析,借鉴小波变换分析暂态行波的基本思想,将小波变换应用到暂态行波信号的提取和分析,探讨了一种新型的信号检测方法-小波变换模之和法(WTMS),以"影响锥"内小波变换模的积分来度量信号的奇异性,用以准确检测、区分故障行波与噪声干扰,避免在故障时拒动的现象,从而弥补了以往行波启动算法的不足.大量的Matlab仿真实验验证了该算法的快速和可靠性.

Study of a Novel Starting Algorithm Using in Traveling Waves Protection

Fault detecting unit plays an important role in ultra-high-speed protection.A novel fault detection method is proposed based on the principle of singularity detection algorithm,which measures the signal regularity by computing the wavelet transform modulus sum(WTMS) inside the corresponding cone of influence,associated the analysis of transient traveling wave.Therefore after analyzing the singularity features of the fault surge,a new starting algorithm using WTMS,which can correctly distinguish fault travel...