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电网技术  2015 

以通量线法为初值的直流线路离子流场计算优化

DOI: 10.13335/j.1000-3673.pst.2015.06.012, PP. 1546-1550

Keywords: 离子流场,合成电场,Deutsch假设,有限元法,空间电荷

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Abstract:

输电走廊的电磁环境是直流输电线路设计与建设中需要考虑的关键问题之一。导线电晕产生的空间电荷形成了离子流场,其求解方法主要是通量线法和有限元数值求解方法。针对通量线法计算速度快而在空间中的结果不甚理想,以及有限元方法计算精度较高而计算效率较低的问题,文章将2种方法的优势结合起来,使用通量线法的计算结果作为有限元法求解的空间节点电荷初值,计算结果与实测结果以及单纯有限元的计算结果吻合很好,在不牺牲有限元法在空间和地面的计算精度的前提下,求解速度和效率得到了提高。使用该方法,计算了输电线路周围的等势线分布,明确了传统通量线法在计算空间电场时由于Deutsch假设所引起的误差。

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