基于有限元分析的500 kV分裂导线电晕研究

 

吴昊，沈志祺，安帅

（国网上海市电力公司 市北供电公司， 上海 200072）

 

    摘 要：分裂导线的使用不仅可以提高线路的输电能力，也能减小电晕。从分裂导线的分裂数、导线半径和等效半径三个参数入手，定量计算三者对减小电晕的作用，经过模型的建立与改进，仿真结果表明：三个参数中分裂数对导线附近的最大电场强度影响最大，对电晕损耗的影响也最大；导线半径与最大电场强度之间没有特殊的规律，利用该模型计算备选导线表面最大电场强度，可以为分析比较哪种导线最合适提供理论依据；对于固定的分裂数和导线半径，存在一个最佳等效半径，能使得导线表面电场强度最低，电晕损耗最少。

    关键词：分裂导线；分裂数；导线半径；等效半径；最大电场强度；有限元分析

    中图分类号：TM 726     文献标识码：A      文章编号：1007-3175(2017)09-0024-03

    Abstract: The use of bundle conductors can not only improve the transmission capacity of the line, but also reduce the corona. The three parameters of the bundle conductors, the radius of the wire and the equivalent radius were used to carry out the quantitative calculation for reducing corona function from them. After the model was built and improved, the simulation results show that the number of bundled conductors in the three parameters had the greatest influence on the maximum electric field intensity near the conductor, as well as the corona loss. There were no special law between the wire radius and the maximum electric field intensity, however, this model could be used to calculate the maximum electric field intensity on the alternative wire surface to provide the theoretical basis for the analysis of which kind of wire was the most suitable. For the fixed bundle conductors and the radius of the wire, there was an optimal equivalent radius, which makes the wire surface have the lowest electric field intensity and the minimal corona loss.

    Key words: bundle conductor; bundle number; conductor radius; equivalent radius; maximum electric field intensity; finite element analysis