500kV交流输电线路下金属体尺寸对暂态电击水平的影响研究  

Sizes of metallic objects effect on transient shock level under 500kV AC transmission lines

作　　者：周丹红 郭昆丽[1] Zhou Danhong;Guo Kunli(School of Electronics and Information,Xi’an Polytechnic University,Xi’an 710048,China)

机构地区：[1]西安工程大学电子信息学院,西安710048

出　　处：《国外电子测量技术》2020年第3期118-123,共6页Foreign Electronic Measurement Technology

摘　　要：人体接触处于高压输电线下的金属体时,会发生暂态电击。采用有限元软件ANSYS建立简化人体模型和金属体模型,计算其感应电压、感应电场,在Simulink搭建接地人体接触对地绝缘的悬浮金属体及对地绝缘的人体接触接地体的仿真模型。通过分析感应电压、放电能量及放电电荷量等参量随金属体尺寸的变化规律,从而得到不同尺寸金属体对人体电击效应的影响。结果表明,当金属体在垂直导线方向尺寸不变时,其感应电压基本不变,此时,若直接接地人体接触金属体,放电电荷量和放电能量随平行导线方向尺寸增大而线性上升,而对地绝缘人体接触接地体,放电电荷量和放电能量则随平行导线方向尺寸增大线性下降。Transient electric shock occurs when a person touch the metallic object under the transmission line.In this paper,the finite element software ANSYS is used to establish the simplified human body model and metallic object.The induced voltage and induced electric field are calculated.The simulation models that are well-grounded people contact suspended metallic object and insulated against ground people contact the grounding body are builted by Simulink.By analyzing the variation of parameters such as induced voltage discharge energy and the discharge amount with the size of metallic object,the influence of different sizes of metallic object on the transient shock effect of the human body is obtained.The results show that the dimension of the metallic object vertical the transmission line remains unchanged,and the induced voltage basically remains unchanged;the discharge amount and discharge energy increase linearly with the size of the parallel the transmission line,while the human body insulated from the earth contacts the metallic object grounded,the discharge charge amount and discharge energy linearly decrease with the parallel wire direction.

关 键 词：高压输电线 金属体 放电电荷量 放电能量 

分 类 号：TM85[电气工程—高电压与绝缘技术]