矿业科学学报2025，Vol.10Issue(4)：638-647,10.DOI:10.19606/j.cnki.jmst.2025029
基于拉氏变换的变频器IT系统的人身触电电流暂态分析方法
Transient analysis of human electric shock current in frequency converter IT system based on Laplace transform
袁广忠 1柳海生 2杨志佳 2孙宝金 2张伟2
作者信息
- 1. 国家电力投资集团内蒙古能源有限公司,内蒙古呼和浩特 010050
- 2. 扎鲁特旗扎哈淖尔煤业有限公司,内蒙古通辽 029123
- 折叠
摘要
Abstract
In order to solve the difficulty in calculating the RMS value of human electlic shcck current caused by pulse modulated wave in case of electrocution accident in low voltage frequency converter IT power supply system of open-pit coal mine fire fighting,a transient analysis method based on Laplace transform is proposed.A transient analysis method of human elcctric shock current based on the La-place transform is proposed to analyze the RMS value of the human electric shock current on the input side and output side of the frequency converter by establishing a piecewise linear model(PLM),and the distribution parameters on both sides of the frequency converter,the carrier frequency,the output frequency,and the load on the output side are investigated to characterize the influence of the electric shock current by constructing a MATLAB/Siumlink simulation model.The results show that the magni-tude of human electric shock current is positively correlated with the capacitance distributed on each side of the frequency converter and the carrier frequency of the frequency converter under the different cases of distribution capacitance of 0.01～1.0 μF,output frequency of 30～60 Hz,and carrier frequen-cy of 1～3 kHz,while it has little relationship with the output frequency of the frequency converter and the load connected to the output side.The simulation test results confirm the correctness of the theoreti-cal analysis.关键词
IT系统/拉氏变换/人身触电电流/分段线性模型/变频器Key words
IT system/Laplace transform/human electric shock current/piecewise linear model(PLM)/frequency converter分类
矿业与冶金引用本文复制引用
袁广忠,柳海生,杨志佳,孙宝金,张伟..基于拉氏变换的变频器IT系统的人身触电电流暂态分析方法[J].矿业科学学报,2025,10(4):638-647,10.
