分裂导线表面场强的一种较准确计算方法

对于特高压输电线路的设计而言,分裂导线表面电场强度的计算是一个主要问题。基于模拟电荷法,提出了一种计算分裂导线表面电场强度的较准确方法。它采用自适应方法确定模拟电荷的位置,并给出了求取各相导线最大场强的计算公式,可直接计算任意导线表面和空间任意点的最大场强。该方法所用的模拟电荷数较少,计算简单,计算准确度较高。实例计算结果验证了该方法的正确性和准确性。

A More Accurate Calculation Method of Surface Electric Field Intensity of Bundled Conductors

As for the design of UHV transmission lines, the calculation of surface electric field intensity of bundled conductors is one of the main problems. Based on charge simulation method a more accurate calculation method of surface field intensity of bundled conductors is proposed, in which the position of simulation charges is adaptively determined and the formulae to calculate maximal field intensity of each phase are deduced, so the maximal field intensity on the surface of arbitrary conductor and that at any spatial point around the conductor can be directly calculated. Less number of simulation charges are used in the proposed method and the calculation is simple. The results of case study show that the proposed method is accurate.