±800kV特高压直流输电工程合成场强监测布点方案优化
首发时间:2020-08-28
摘要:高压直流输电工程目前在我国发展迅速,电力2025年远景规划中将有数十条直流输电工程建成, 直流输电在"西电东送"战略中发挥着十分重要的作用。本文对高压直流输电工程电磁环境中合成场强的监测布点方案进行了合理的优化, 并对优化后的布点方案进行了可行性分析。文章采用理论计算和现场监测相结合的方法,理论计算为基于有限元近似的Maxwell 2D仿真, 给出标称电场, 再经过计算得到合成场强。现场监测为±800 kV郑州-哈密直流输电工程甘肃段两个监测点的结果。通过理论计算值与实际监测数据的比对, 给出合成场强理论值和监测值的相对变化趋势,以及合成场强的峰值位置,并提出监测布点的优化方案。文章对这种优化布点方案进行了误差分析。
关键词: 特高压直流输电工程 电磁环境监测 合成场强 布点方案
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Optimization of layout schemes in the monitoring of total electric-field strength for ±800kV UHV DC transmission lines
Abstract:Ultra-high voltage DC (UHVDC)transmission project has been developed rapidly in the post decades.. In China electric power 2025 long-range plan, dozens of high DC voltage transmission projects will also be accomplished. UHVDC voltage transmission technology plays a very important role in China\'s West-East electricity transfer project. In this paper, we show an optimized layout scheme of total electric-field strength which is the major evaluation factor in electromagnetic environment monitoring of HVDC voltage transmission project. A Maxwell 2D simulation of ±800kV UHVDC Transmission Lines was done. The purpose of the simulation is to obtain the electric static field strength by using finite element approximation. Then we calculated the total electric field strength by the parameters from actual electric field monitoring. We also show the monitoring results of Zhenzhou-Hami ±800kV UHVDC Transmission Lines. By the comparison of theoretical calculations and actual monitoring results, we know the relative change trends of the total electric-field strength. We obtained the peak position of corresponding total electric field strength. and presented a reasonable optimization pointed at the layout scheme of actual monitoring. A brief discussion about error analyses of the layout scheme was also analyzed in this paper.
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±800kV特高压直流输电工程合成场强监测布点方案优化
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