两回高压直流输电线路交叉跨越时地面合成电场计算

发布时间：2018-09-10 10:37

【摘要】：高压直流输电线路交叉跨越是我国特高压技术发展中可能出现的新问题。为了建设满足电磁环境要求的直流输电工程,应当研究相应的合成电场预测方法。由于两回直流线路相互影响,交叉跨越区域内合成电场呈复杂的三维分布。本文提出一种两回直流线路交叉跨越时地面合成电场的计算方法,该方法基于三维通量线法,采用模拟电荷法计算标称电场,利用Deutsch假设计算合成电场。通过在实验室内搭建直流导线交叉跨越试验平台,对计算方法进行验证。基于该方法,对±800k V线路跨越±500k V线路时地面合成电场的分布进行研究。与一回±500k V线路单独存在相比,±800k V线路以90°跨越±500k V线路时,地面合成电场峰值基本不变,但分布规律更为复杂。
[Abstract]:Cross-crossing of HVDC transmission lines is a new problem in the development of UHV technology in China. In order to construct HVDC transmission project which meets the requirements of electromagnetic environment, the corresponding synthetic electric field prediction method should be studied. Because of the interaction between the two DC lines, the synthetic electric field in the cross-crossing region presents a complex three-dimensional distribution. In this paper, a method for calculating the ground synthetic electric field in the cross crossing of two DC lines is presented. Based on the 3D flux line method, the nominal electric field is calculated by the simulated charge method, and the synthetic electric field is calculated by using the Deutsch hypothesis. The calculation method is verified by setting up a test platform for crossing and crossing of DC conductors in the laboratory. Based on this method, the distribution of the ground synthetic electric field of 卤800kV line crossing 卤500kV line is studied. Compared with single 卤500kV line, when 卤800kV line spans 卤500kV line at 90 掳, the peak value of surface synthetic electric field is almost unchanged, but the distribution law is more complex.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【基金】：国家自然科学基金重点项目(51037001) 国家电网公司科技项目(GYB17201400185) 中央高校基本科研业务费专项资金(2015XS18)资助
【分类号】：TM75

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