基于有限元法的±500kV同塔双回线路电磁环境仿真计算

为了研究±500kV同塔双回直流输电线路的电磁场环境对带电作业人员的影响,以及对该输电线路带电作业安全防护提供理论仿真研究。以±500kV同塔双回直流输电线路型号为Z101的直线塔作为研究对象,采用Soild Works和COMSOL混合建模技术,建立了直线塔的三维模型。针对6种典型的带电作业位置,本文采用COMSOL软件对Z101直线塔的电场和电势分布进行了仿真研究。研究结果表明:5号作业位置的人体电势差最大,且除了4号和5号作业位置外,其他作业位置人体电势差值接近;此外,作业人员器官的最大电场强度出现在颈部和四肢处;5号作业位置处人体各器官的电场强度是最大的,普遍超过了规定安全作业限值。因此作业人员在该同塔双回直流输电线路上进行带电作业时,应穿戴屏蔽服,并做好其他安全防护措施,且所研究结果可为其他工程提供技术参考。

Simulation calculation of electromagnetic environment of ±500 kV double-circuit transmission line based on finite element method

In order to study the influence of electromagnetic environment of ±500 kV double-circuit transmission line on live working , and provide the theoretical and numerical simulation studies of safety protection of live working , this paper takes the Z101 line tower of ±500 kV double-circuit transmission line as the research object , and establishes a three-dimensional model of the line tower with the mixed modeling techniques based on COMSOL and Soild Works .Ac-cording to the six different topical live working positions , the study of simulation is carried out towards the electric field and potential distribution of Z 101 line tower by using COMSOL .The results show that the potential difference of NO .5 position is the maximum, and the potential differences of all the other positions except No .4 and No.5 are similar, be-sides, the maximum electric field strength of human organs apears on the neck and limbs , and the electric field strength of human organs of No .5 position is the strongest , which generally exceeds the limit value of safety operation .There-fore, the worker should wear screen clothes and make other safety precaution efforts before live working in the double -circuit DC transmission line , and the results of this paper could provide the technical reference of other projects .