±800kV西昌裕隆换流站接地网地面电位分布计算

Calculation of Ground Potential Distribution of ±800 kV Yulong Converter Station Grounding Grids in Xichang

目前接地网地面电位分布计算的研究主要集中在低中压站接地网,而针对特高压的计算研究甚少。本文以±800 kV西昌裕隆换流站接地网为例,介绍了一种计算接地网地面电位分布的方法。该方法基于恒流场理论,首先采用镜像法计算出接地网各点的自电阻和互电阻,然后依据所得电阻值运用表面电荷法求出接地网任意点的电位,最后应用Origin软件进行仿真,得出电位分布图。该结果可为接地网的设计合理性评估提供参考,并对接地网的防护进行针对性的、有效的指导。

voltage The research of calculation of ground potential distribution mainly concentrated in the low medium standing ground net recently, but it is little of UHVDC. The paper takes the ＋ 800 kV Yulon station as ex- ample, and introduces a method of calculating ground potential distribution . The method is based on the theory of constant current field. First, image method is used to calculate the grounding network of the resistance and cross re- sistance, and then according to the resistance value by surface charge method to find the potential of an arbitrary point, and finally apply the origin software to simulate, the results can provide reference for the design of the grounding network rationality evaluation, and targeted and effective guidance of the protection of grounding grid.