+高级检索
基于VMD-LSTM的触电电流提取方法研究
DOI:
作者:
作者单位:

作者简介:

通讯作者:

基金项目:


Research on Extraction Method of Electric Shock Current Based on VMD-LSTM
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    为有效提取触电故障特征,实现从剩余电流中分离出触电电流,提出了一种基于 变分模态分解(Variational Mode Decomposition,VMD)与长短期记忆神经网络(Long Short Term Memory,LSTM)相结合的触电电流提取方法 . 利用果蝇优化算法对 VMD参数[K,α]寻优获得 最优参数组合[6,280],以VMD分解的剩余电流最佳模态分量突变特性为依据,定义相邻周期 电流幅值和的增长率 η1、η2作为判别触电事故的特征量;以 6层模态分量信号重构触电信号, 构建基于LSTM网络的触电电流检测模型. 240组触电信号研究结果表明:当η1、η2至少一个满 足大于 1% 时,均发生触电,否则无触电事故发生;相比于 VMD-BP、VMD-RBF 检测模型, VMD-LSTM 检测模型提取的触电电流与真实触电电流的相关系数平均值分别提高了 6.2%、 2.3%,均方根误差平均值分别降低了36.8%、27.1%,提出的方法具有更高的检测精度. 研究结 果为研发基于生物体触电电流动作的剩余电流保护装置提供了参考.

    Abstract:

    In order to effectively extract the characteristics of electric shock faults and realize the separation of electric shock current from residual current,this paper proposes a new method of electric shock current extraction based on the combination of Variational Mode Decomposition(VMD)and Long Short Term Memory(LSTM). The parameters of VMD[K,α]were optimized by fruit fly optimization algorithm to obtain the optimal combination of pa? rameters[6,280]. Based on the mutation characteristics of the optimal modal component of the residual current de? composed by VMD,the growth rates η1 and η2 of the sum of the current amplitudes in adjacent periods are defined as the characteristic quantities for judging electric shock accident. The electric shock current signal is reconstructed from the six layers modal component signal,and the electric shock current detection model based on LSTM network is constructed. The results of 240 groups of electric shock signals show that,when at least one of η1 and η2 is greater than 1%,electric shock occurs,otherwise no electric shock accident occurs. Compared with the VMD-BP and VMD-RBF detection models,the average correlation coefficients of the VMD-LSTM detection model are increased by 6.2% and 2.3%,respectively,and the average root mean square error is reduced by 36.8% and 27.1%,respectively. The method proposed in this paper has higher detection accuracy. The research results provide a certain reference for the development of residual current protection devices based on the electric shock current of the biological body.

    参考文献
    相似文献
    引证文献
文章指标
  • PDF下载次数:
  • HTML阅读次数:
  • 摘要点击次数:
  • 引用次数:
引用本文

李春兰 ?,王静 ,石砦 ,王长云 ,罗杰 ,任鹏 .基于VMD-LSTM的触电电流提取方法研究[J].湖南大学学报:自然科学版,2022,49(2):149~159

复制
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2022-03-04
  • 出版日期:
作者稿件一经被我刊录用,如无特别声明,即视作同意授予我刊论文整体的全部复制传播的权利,包括但不限于复制权、发行权、信息网络传播权、广播权、表演权、翻译权、汇编权、改编权等著作使用权转让给我刊,我刊有权根据工作需要,允许合作的数据库、新媒体平台及其他数字平台进行数字传播和国际传播等。特此声明。
关闭