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机构地区:[1]长沙理工大学电气与信息工程学院,长沙410114
出 处:《高压电器》2015年第8期164-170,共7页High Voltage Apparatus
摘 要:500 k V与220 k V交流同塔四回输电线路与单一电压等级超高压线路的空间分布具有较大区别,线路带电作业电场环境更为复杂。笔者采用有限元法仿真计算同塔四回输电线路典型带电作业位置的电场分布特点,通过建立人体仿真模型,计算分析等电位和地电位典型作业工况下人体不同部位的电场强度,进而确定带电作业人员安全防护措施。结果表明,等电位作业时需穿屏蔽效率为40 d B的防护服,地电位作业人员穿戴常规防护服可满足作业要求。The spatial distribution of 500 k V and 220 k V four-circuit-on-one-tower transmission line is quite different from that of the UHV transmission line with single voltage level, and its electric field environment of live working is more complex. In this paper, the finite element method is used to simulate the electric field distribution of the four-circuit-on-one-tower transmission line, and a human body simulation model is established to calculate and analyse the electric field intensity on different parts of the human body in equipotential and ground potential conditions, and hence to select safety protection measures for the persons of live working. It is concluded that the protective clothing with shielding efficiency of 40 d B is necessary for the person who works in equipotential condition, and the conventional protective clothing is safe for the person who works in ground potential condition.
关 键 词:带电作业 同塔四回输电线路 人员体表场强 安全防护措施
分 类 号:TM75[电气工程—电力系统及自动化] TM84
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