一种新的小电流接地选线算法

在分析以往小电流接地选线各种算法的基础上，提出了一种基于数学形态学及小波变换综合的选线算法，该算法利用数学形态学滤波器对采集到的电压电流信号进行滤波，而后利用小波变换的奇异性理论和模极大值理论来构成接地选线算法，本算法很好地体现了形态学滤波器的噪声抑制能力和小波分解的奇异点检测能力。Matlab仿真结果表明，该算法不受中性点接地方式和线路参数的影响，且具有较强的承受过渡电阻的能力。

A new feeder selection algorithm for neutral ineffective grounded system

This paper analyses the characteristics of various feeder selection algorithm. Then a new algorithm for fault feeder selecting based on morphological transform and wavelet transform is put forward, mathematical morphology filter is used to filter noise in the voltage and current signal collected and frequency localization character of wavelet transform is used to compose selection algorithm in this algorithm which combines the excellent singularity detecting together with the noise-repressing abilities of mathematical morphology filter, The results of simulation using MATLAB demonstrate that this algorithm is immune to the variation of network structures and parameters.It also has the ability of enduring high transition resistance.