摘要
针对±1 100 kV特高压带电作业电位转移的研究空白,基于多导体系统集总电容矩阵理论,建立了电位转移的暂态响应计算模型,计算并分析了不同转移距离与人体电位、放电电流和能量的关系。通过计算结果可知:人体电位、放电电流、能量在数值上与转移距离成正比;转移时人体与极导线经过1μs实现等电位,转移距离影响人体电位幅值,对等电位速度影响不明显;综合局部放电电流和电位转移电流得到最佳转移距离为0.4~0.5 m;能量释放与转移距离成正比,当距离为0.4 m和0.5 m时,释放能量分别约为1.19 J和1.39 J,作业过程中要注意屏蔽服局部温升问题。
To research potential transfer of live working on ±1 100 kV UHV transmission line,on the basis of the multi conductor system lumped capacitance matrix theory,we established a transient response model of the transfer potential calculation,and calculated and analyzed the relationship between the distances and different metastatic potential of the human body,the discharge current,and energy.The analysis results show that the human potential,discharge current,and energy are proportional to the transfer distance in numerical value; the transfer of the body and the pole after 1 μs can achieve the equipotential,and the transfer distance only affects the amplitude of the human body and the effect of the equipotential velocity is not obvious; the optimal transfer distance of the integrated partial discharge current and the potential transfer current is 0.4～0.5 m; the energy release is proportional to the transfer distance,when the distance is 0.4 m and 0.5 m,the release energy is about 1.19 J and 1.39 J.In the course of the operation,we should pay attention to the problem of local temperature rise shielding clothing.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2017年第10期3149-3153,共5页
High Voltage Engineering
基金
国家电网公司科技项目(5216AD14000J)~~
