500kV同塔双回输电线路直升机吊索法带电作业进入等电位的路径  

Path to Access Equipotential for Live Working of 500kV Same-Tower Double-Circuit Transmission Line by Helicopter Sling Method

作　　者：唐波[1,2] 李勃铖 奉彭 陈兰 蔡智勇 TANG Bo;LI Bocheng;FENG Peng;CHEN Lan;CAI Zhiyong(College of Electrical Engineering and New Energy,China Three Gorges University,Yichang,Hubei 443002,China;Hubei Provincial Engineering Technology Research Center for Power Transmission Line,China Three Gorges University,Yichang,Hubei 443002,China;Guangdong Power Grid Energy Development Co.,Ltd.,Guangzhou 510160,China;Starlisten Power Tech Co.,Ltd.,Fuzhou 350019,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]湖北省输电线路工程技术研究中心(三峡大学),湖北宜昌443002 [3]广东电网能源发展有限公司,广州510160 [4]福建智达力胜电力科技有限公司,福州350019

出　　处：《南方电网技术》2020年第6期71-80,共10页Southern Power System Technology

摘　　要：500kV同塔双回输电线路由于导线排列密集,通常只能采用直升机吊索法进行带电作业,这对作业人员进入等电位的路径选择带来很大困难。以两种典型同塔双回输电线路的双三角形和六角形导线排列方式为研究对象,结合直升机和导线之间的空间位置关系,提出了可行的直升机吊索法进入等电位的路径区域。采用场域分解的方法将三维无界场域分解成有界子区域,利用ANSYS软件计算了进电位过程不同位置的直升机机身场强,获得了直升机与导线之间的安全距离。在明确等电位作业人员组合间隙后,结合人体表面场强的计算,提出了作业人员进入等电位的最优路径。经500kV鼓峰甲、乙线直升机吊索法带电作业实操应用表明,直升机距离导线8 m,作业人员从距导线水平面斜上方0~15°区域进入等电位作业安全。The 500 kV double circuit transmission line can only be operated by helicopter sling method due to the dense conductor arrangement,which makes it very difficult for the operator to choose the path to access equipotential. A feasible helicopter sling method to access the path region of equipotential is proposed by taking the double triangle and hexagonal wire arrangements of two typical same-tower double-circuit transmission lines as the objective and considering the spatial position relationship between helicopter and wire. The field decomposition method is used to decompose the three-dimensional boundless field into bounded sub-regions,and the field strength of the helicopter body at different locations during approaching is calculated by ANSYS software to obtain the safe distance between the helicopter and the wire. After specifying the combined margin of equal potential for operator,the optimal path for the operator to access the equal potential is proposed in combination with the calculation of the human body surface field strength. The practical application of helicopter sling method in live line operation of 500 kV Gufeng line A and B shows that the operators can enter the equal potential operation safely from the area 0 ~ 15 ° above the horizontal plane of the conductor while the helicopter is 8 m away from the conductor.

关 键 词：500KV同塔双回输电线路 带电作业 直升机吊索法 进入等电位 人体表面场强 最优路径 

分 类 号：TM726.1[电气工程—电力系统及自动化]