民居附近高压输电走廊电场屏蔽方案分析与优化

Analysis and Optimization of High Voltage Electric Field Shielding Scheme of Transmission Corridor in Residential area

为有效解决邻近高压输电走廊居民楼工频电场超标问题，在有限元计算基础上，研究了不同屏蔽方式与其空间架设位置对工频畸变电场屏蔽的影响。通过畸变电场的仿真计算，深入分析屏蔽方式及其架设位置与屏蔽效能的关系，提出通过优化屏蔽设备的空间架设位置提高屏蔽效果的新思路。并综合考虑屏蔽效果和膦蔽成本，对110～1000kV4个电压等级高压输电线路工频电场屏蔽方案进行设计。研究表明：通过合理选择辟敲疗式和优化架设位置，可大幅度提高屏蔽效能．对工频电场具有良好的屏蔽效果，对降低输电工程的环保成书具有最要意义，而不合理架设屏蔽设备则会使电场环境发生恶化。

In order to solve problem of high power frequeney electric field in resideatial buihtings caused by nearby high vohage transmission corridor, shielding effectiveness of different shiehling methods and their space eonstruetion are studied based on finite element eah＇ulation. Tfirough simulation calculation of distorted electrie fieht, the relationship between shielding method and effectiveness is analyzed. A new method to impnve shiehling effect is proposed by optimizing space construction model. The power frequency electric fieht shiehling sehemes for four voltage level high voltage transmission line, ranging fiom 110 kV to 1 000 kV, are designed with consideration of shiehling effect and eonstru（.tion cost. The research shows that shiehling effectiveness could be improved greatly hy reasonable selection of shielding method and optimized mounting position. This is vel7 important for reducing environmental cost of transmission project.