基于有限元分析的500 kV分裂導(dǎo)線電暈研究

 

吳昊，沈志祺，安帥

（國網(wǎng)上海市電力公司 市北供電公司， 上海 200072）

 

    摘 要：分裂導(dǎo)線的使用不僅可以提高線路的輸電能力，也能減小電暈。從分裂導(dǎo)線的分裂數(shù)、導(dǎo)線半徑和等效半徑三個(gè)參數(shù)入手，定量計(jì)算三者對減小電暈的作用，經(jīng)過模型的建立與改進(jìn)，仿真結(jié)果表明：三個(gè)參數(shù)中分裂數(shù)對導(dǎo)線附近的最大電場強(qiáng)度影響最大，對電暈損耗的影響也最大；導(dǎo)線半徑與最大電場強(qiáng)度之間沒有特殊的規(guī)律，利用該模型計(jì)算備選導(dǎo)線表面最大電場強(qiáng)度，可以為分析比較哪種導(dǎo)線最合適提供理論依據(jù)；對于固定的分裂數(shù)和導(dǎo)線半徑，存在一個(gè)最佳等效半徑，能使得導(dǎo)線表面電場強(qiáng)度最低，電暈損耗最少。

    關(guān)鍵詞：分裂導(dǎo)線；分裂數(shù)；導(dǎo)線半徑；等效半徑；最大電場強(qiáng)度；有限元分析

    中圖分類號(hào)：TM 726     文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：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