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。
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 3830.01 mV/m.
作者
王军燕
王鹏
刘勇
徐宁
夏扬
刘承志
WANG Junyan;WANG Peng;LIU Yong;XU Ning;XIA Yang;LIU Chengzhi(State Grid Anhui Electric Power Co.,Ltd.,Hefei 230000;Chizhou Power Supply Company,Chizhou 247000;Anhui Mingsheng Electric Power Investment Group Co.,Ltd.,Hefei 230022)
出处
《电力安全技术》
2024年第5期43-48,共6页
Electric Safety Technology
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
double-circuit DC transmission lines on the same tower
construction equipment-induced electricity
electric field distortion
human-induced electricity
