摘要
针对农村低压电网发生触电故障时触电生物电流及其成分分量的复杂性和多样性,采用快速傅里叶变换对触电生物实验获取的电源电压、剩余电流以及触电生物电流进行频谱分析,明确了剩余电流与触电生物电流频谱特性及各成分分量变换过程。仿真实验表明：在触电故障发生时剩余电流与触电生物电流相关系数为0.999,其中触电生物电流中直流分量的最大畸变率最大可达0.044 5,2~5次谐波的最大畸变率分别为0.013 4,0.035 4,0.006 9,0.014 2,能够为提取生物触电故障过程中剩余电流的变化规律提供依据。
In terms of the complexity and variety of electric shock bioelectric current and its composition component when electric shock fault occurring in rural low-voltage power grid,residual current and electric shock bioelectric current spectrum characteristics and transformation process of each component were clarified by using fast Fourier transform to analyze the spectrum of the power supply voltage,residual current and electric shock bioelectric current obtained from electric shock bio-experiment.Simulation results showed that when the electric shock fault occurred,the residual current and electric shock bioelectric current correlation coefficient was 0.999,the greatest component in the electric shock bioelectric current aberration rate was up to 0.044 5,2-5 times of the highest harmonic aberration rate was 0.013 4,0.035 4,0.006 9 and 0.014 2 respectively,which could provide the basis for the extraction in the process of biological electric fault caused by variation of residual current.
出处
《黑龙江八一农垦大学学报》
2016年第3期129-133,147,共6页
journal of heilongjiang bayi agricultural university
基金
新疆维吾尔自治区高等学校科研计划项目(XJEDU2012I15)
黑龙江八一农垦大学校博士启动基金项目(XDB2015-10)
国家自然科学基金项目(51177165)
关键词
剩余电流保护
快速傅里叶变换
触电生物电流
频谱分析
residual current protection
fast fourier transform
electric shock bioelectric current
spectrum analysis
作者简介
李磊（1989-），男，黑龙江八一农垦大学信息技术学院2014级硕士研究生。
通讯作者：杜松怀，教授，博士研究生导师，E-mail：songhuaidu@cau．edu．cn。
