摘要
实地测量了三种典型500 kV铁塔附近离地1.5 m高的工频电场。搭建了三维铁塔模型,基于有限元法仿真计算了三种塔型附近工频电场分布,分析了测量值与计算值的差别及影响因素,并结合实际工程求解了两种典型的等电位作业路径上的电场分布。研究结果表明:铁塔附近地面上工频电场实测值均满足环评要求;铁塔对附近地面的电场具有一定屏蔽作用;采用该方法计算的结果与测量值一致,可以推广到构造更为复杂的输电线路电场计算,并为线路设计提供一定的理论依据;两种等电位作业路径的电场分布差别不大,实际路径的选取应主要考虑到带电作业危险率和所需最小安全距离这两大因素。
The power frequency electric field near three typical 500 kV power transmission tower1.5 m above ground is measured. Based on finite element method （FEM）, three-dimensionaltransmission tower calculation models are established and the electric field distribution of powerfrequency electric field near the three different type towers are simulated and calculated. Thedifferences between measurements and calculated results, and the influence factor are both analyzed.The electric field distribution along two typical equal potential working route are also researchedcombined with practical engineering. Research results show that electric field measurements nearby thetower meet EIA requirements; the tower has a certain screening effect on its electric field nearby; theresults calculated by method presented above matches well with the field measurements, can bepromoted to tower with more complex structure, and provide theoretical basis for the design of EHVtransmission lines; the electric field distribution difference between two typical equal potential workingroute is slight, thus selection of actual routes should mainly take dangerous rate for equal potentialworking and required minimum safe distance into account.
出处
《电瓷避雷器》
CAS
北大核心
2017年第1期30-36,共7页
Insulators and Surge Arresters
关键词
典型铁塔模型
工频电场测量
有限元法
等电位作业
typical tower model
power electric field measurement
finite element method （FEM）
equal potential working
