高压电器2018，Vol.54Issue(8)：120-126,132,8.DOI:10.13296/j.1001-1609.hva.2018.08.019
750 kV同塔双回输电线路感应电压和电流的研究
Study on the Induced Voltage and Current on the 750 kV Double Circuit Transmission Line on the Same Tower
摘要
Abstract
The EHV/UHV transmission lines on the same tower have high induced voltage and current due to the small spacing and short distance, which will directly affect the line maintenance, operation and selection of grounding switch equipment. Taking the 750 kV double circuit transmission line on the same tower from Lanzhou east to Qianxian as an example, we use ATP/EMPT electromagnetic transient simulation software to build the model of double circuit transmission line on the same tower and then analyze the effects of horizontal spacing between transmission lines, length of the running line, height of the grounding wire, soil resistivity and operating current on the induced voltage and current on the maintenance line and get the current sizes through the maintenance staff under various typical working conditions. The results show that: the induction voltage and the induced current on the maintenance line are inversely proportional to the horizontal spacing;length of the running line has a significant influence on the electromagnetic induction voltage and the static induction current on the maintenance line;height of the grounding wire has great influence on static induction voltage and electromagnetic induction component;the effect of soil resistivity on the induced voltage and current on the maintenance line can be neglected;the operating current impacts the electromagnetic induction voltage and the electromagnetic induction current significantly. When the grounding wires are connected to both sides of the maintenance position, the current through the maintenance personnel can reach to the grade of m A, and the safety of the personnel can not be fully guaranteed, so a security line needs to be added in the maintenance point to lower the current flowing through the human body to the microampere level and ensure the safety of the maintenance personnel.关键词
同塔双回/水平间距/运行线路长度/地线高度/土壤电阻率/运行电流/接地线Key words
double circuit on same tower/horizontal spacing/length of the running line/height of the grounding wire/soil resistivity/operating current/grounding wire引用本文复制引用
史志强,邹德华,俞乾,杨雅倩,郭天伟,李稳,罗日成..750 kV同塔双回输电线路感应电压和电流的研究[J].高压电器,2018,54(8):120-126,132,8.基金项目
国家自然科学基金资助课题 (50977003)；电力与交通安全监控及节能技术教育部工程研究中心基金 (2010#03).Project Supported by National Natural Science Foudation of China(50977003)，Power and Traffic Safety Monitoring and Energy Saving Engineering Research Center of Ministry of Education Fund(2010#03). （50977003）
