一种改进的小波算法在矿井漏电保护系统选线中的应用

Application of an Improved Wavelet Algorithm in Fault Line Selection of Leakage Protection System of Mine

分析了目前常见的用于矿井漏电保护系统的各种选线理论的优缺点;针对基于小波算法的矿井漏电故障暂态信号选线方法中存在的暂态信号不易捕捉、实时检测较困难的问题,提出了一种基于自适应滤波器技术的改进型小波算法。该改进型算法可有效滤除干扰噪声,轻松获取故障线路零序电流的有用信息。仿真实验结果验证了该算法的有效性。

Advantages and disadvantages of existing common fault line selection theories applied in leakage protection system of mine were analyzed. In order to solve problems of capturing and realtimely detecting transient signals in line selection method with transient signals of leakage faults in mine based on wavelet algorithm, an improved wavelet algorithm based on self-adapting filter technology was proposed. Disturbances and noise can be filtered effectively by the algorithm so as to get available information of zerosequence current of fault line easily. The simulation result showed validity of the improved algorithm.