500 kV直流输电线路下方施工设备及人体感应电研究
Research on Construction Equipment and Human-induced Electricity Below the 500 kV DC Transmission Lines
王军燕 1王鹏 1刘勇 1徐宁 1夏扬 2刘承志3
作者信息
- 1. 国网安徽省电力有限公司,安徽 合肥 230000
- 2. 国网安徽省电力有限公司池州供电公司,安徽 池州 247000
- 3. 安徽明生电力投资集团有限公司,安徽 合肥 230022
- 折叠
摘要
针对500 kV同塔双回直流输电线路下方感应电相较于交流线路难以准确分析的问题,研究了同塔双回直流输电线路下方基础施工设备感应电分布规律及施工人员感应电防护措施.采用Solid Works和Ansoft Maxwell混合建模技术,分析了灌注桩基础设备感应电特性、工程施工装备对电场畸变的影响特性和线路下方施工人员位于不同位置时人体周围及体表的电场强度分布,结果表明:灌注桩钢筋笼和基础施工设备的存在会使线路下方的电场发生畸变,且越靠近杆塔畸变率越高,最大电场畸变率分别为75.54%和107.67%;人体体表及周围电场强度与杆塔距离相关,最大可达3830.01 mV/m.
Abstract
In response to the problem of difficulty in accurately analyzing induced electricity below the 500 kV double-circuit DC transmission lines on the same tower in contrast to those AC lines,research is conducted on the distribution law of induced electricity in foundation construction equipment below the double-circuit DC transmission lines on the same tower and the safety protection measures for construction personnel-induced electricity.A model is established using a hybrid modeling technique of Solid Works and Ansoft Maxwell,through which analyses were carried out on the induced electricity characteristics of the foundation equipment of the cast-in-place piles,the influence characteristics of engineering construction equipment on electric field distortion,and the distribution of electric field intensity around and on the surface of the human body when the workers below the lines are located at different positions.The results shows that the presence of steel cages of the cast-in-place piles and the foundation construction equipment will cause distortion of electric field below the lines,and the closer approaching to the tower,the higher the distortion rate is,with the maximum electric field distortion rates of 75.54%and 107.67%respectively.The strength of the electric field on the surface of human body and its surroundings is correlated to the distance from the tower,with the maximum of 3 830.01 mV/m.
关键词
同塔双回直流输电线路/施工设备感应电/电场畸变/人体感应电Key words
double-circuit DC transmission lines on the same tower/construction equipment-induced electricity/electric field distortion/human-induced electricity引用本文复制引用
出版年
2024
NETL
NSTL
万方数据