1000kV特高压线路带电作业等电位过程路径优化设计

特高压线路电压等级高、结构尺寸大、局部场强畸变更严重等特点给带电作业提出更高的技术要求。为研究1000 kV特高压交流线路采用吊篮法等电位作业的最优路径,文中利用有限元法计算分析了作业人员等电位作业过程中的体表场强动态分布,并结合粒子群优化算法求解等电位作业的最优路径,最后对路径安全性进行了现场试验。研究结果表明:特高压交流直线塔带电作业人体表面最大场强约为2468 kV/m,现有防护措施能够保证带电作业人身安全;试验数据验证了路径优化方法的可行性和可靠性,为后续特高压线路其它塔型等电位作业路径选取提供设计参考。

Path Optimization Design of Equipotential Live Working in 1000 kV UHV Transmission Lines

The UHV has higher voltage,larger structural size and more serious local field distortion,which puts higher technical requirements for live working.In order to explore the optimal path when using the hanging basket method for equipotential operation of 1000 kV UHV AC line live working,this paper uses the FEM to calculate the dynamic distribution of the surface field strength of the workers during the process of entering the equipotential.Combined with the particle swarm optimization algorithm,the optimal path of the equipotential is obtained.Finally,the field safety of the optimized path is tested.The research results show that the maximum field strength of the human body surface is approximately 2468 kV/m,and the existing safety protection measures can ensure the personal safety of the UHV live working.The test data verifies the feasibility and reliability of the path optimization method,and provides a design reference for the path selection of other tower-type live working in UHV lines.