基于快速匹配追踪算法的电气接地故障时频特征定位技术

Time-freque ncy Feature Locati on Technology of Electrical Grounding Fault Based on Fast Matching Pursuit Algorithm

传统电气接地故障时频特征定位方法误差较大。为此,提出基于快速匹配追踪(matching pursuit,MP)算法的电气接地故障时频特征定位技术。采用区间滑模观测器对电气接地故障信息的原始数据采样,提取电气接地故障信息的时频差异性特征量,并采用快速MP算法进行分类融合处理,构建电气接地故障信息的统计信息检测模型,实现对电气接地故障视频特征的定位。仿真结果表明,采用所提方法进行电气接地故障时频特征定位的精度较高,提高了对电气接地故障的诊断能力。

The traditional time-frequency characteristic location method of electrical grounding fault has large errors.To this end,a fast MP(matching pursuit)algorithm-based electrical grounding fault time-frequency feature location technology was proposed.The interval sliding mode observer was used to sample the original data of electrical grounding fault information,extract the time-frequency difference characteristic quantity of electrical ground faulting information,and employ the fast MP algorithm for classification and fusion processing to construct a statistical information detection model for electrical grounding fault information,and realize the location of the video characteristics of electrical ground faults.The simulation results show that this method has higher accuracy in locating the time-frequency features of electrical grounding faults,and improves the ability of electrical grounding fault diagnosis.