李　顺　易秀成（南京信息工程大学易龙防雷技术研究院，南京市 210044）

雷电流采集的数据处理方法研究（李顺 　易秀成）

Research on Data Processing Method of Lightning Current Collection

LI Shun YI Xiucheng(E‑lord Lightning Protection Technology Research Institute,Nanjing

University of Information Science & Technology,Nanjing 210044，China)

    Abstract：Considering the incorrect judgement of lightning stroke counter,big measurement error of lightning arrival time and high mistake rate of lightning current polarity caused by large noise signal in lightning current collection,digital signal processing algorithm is employed,and infinite impulse response (IIR)digital low‑pass filter is designed based on the analysis of frequency band and amplitude of lightning current;the software is designed based on MATLAB / GUI to realize visualized operation and processing of lightning current data. MATLAB simulation results and experimental results show that the filter has a remarkable effect on filtering lightning current noise.

   Key words：lightning current;data processing;low‑pass filter;infinite impulse response;denoising;lightning stroke counter;time domain waveform;frequency domain spectrum

  摘　要：针对雷电流采集中噪声信号较大，引起雷击计数器误判、雷击到达时间测量误差大、雷电流极性错判率高的问题，采用数字信号处理算法，在分析雷电流频带及幅值的基础上，设计无限脉冲响应（IIR）数字低通滤波器；并基于MATLAB / GUI设计可视化操作处理雷电流数据的软件。MATLAB仿真结果和实验测试结果表明，该滤波器对雷电流噪声滤除有显著效果。

  关键词：雷电流；数据处理；低通滤波器；无限脉冲响应；去噪；雷击计数器；时域波形；频域频谱

  中图分类号：TU895　　　　   　文献标识码：A

    doi：10.3969 / j. issn.1003 － 8493.2020.010.006