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电网技术  2011 

高压输电导线三维工频电磁场计算与测量

, PP. 159-164

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Abstract:

为准确计算高压输电线路以及交叉跨越输电线路的工频电磁场,基于模拟电荷法和毕奥-萨瓦定律,根据悬链线方程建立了输电导线的三维电磁场通用计算模型。计算和测量了常规同塔双回线路以及交叉跨越导线下方的工频电磁场分布,结果表明,在垂直档距中央的横向分布上,三维模型计算结果与二维模型导线计算高度取最小对地高度时的计算结果十分接近,且均与实测值比较吻合;交叉跨越导线下方交叉点投影位置,工频电磁场计算值与测量值也吻合较好,验证了交叉跨越导线计算模型的有效性。此外,分析了导线下方工频电磁场计算值与测量值的误差来源,着重讨论了影响三维计算模型计算结果的相关因素,给出了导体线单元剖分段数的合理值。

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