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首页> 外文期刊>Electric power systems research >Comparison of zeroth-order and harmonic expansion calculation of the electrostatic parameters of three-conductor bundles
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Comparison of zeroth-order and harmonic expansion calculation of the electrostatic parameters of three-conductor bundles

机译：三导体束静电参数零阶和谐波展开计算的比较

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摘要

An electrostatic field analysis of three-conductor bundles in triangular and flat (coplanar) configurations above ground is presented. The two configurations are compared from the viewpoint of bundle-to-ground capacitance, geometric mean radius, surface charge distributions, and electric field strength. Approximate results, neglecting proximity effects are firstly obtained considering a zeroth-order approach for the potential coefficient matrix. Accurate results are determined by application of the harmonic expansion method in order to correctly deal with proximity effects between individual conductors of the bundle. The latter approach yields significantly increased values for the electric field strength at certain points along the circumference of the individual conductors of the bundle. It is shown that the triangular configuration is more effective as far as corona problems are concerned.
机译：给出了在地面以上的三角形和平坦（共面）构型的三导体束的静电场分析。从束对地电容，几何平均半径，表面电荷分布和电场强度的角度比较了这两种配置。首先考虑势系数矩阵的零阶方法，获得忽略邻近效应的近似结果。为了正确处理线束中各个导体之间的邻近效应，可以通过应用谐波扩展方法来确定准确的结果。后一种方法在沿着束的各个导体的圆周的某些点处产生显着增加的电场强度值。结果表明，就电晕问题而言，三角形结构更为有效。

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