500 kV交流线路钻越±800 kV直流线路三维离子流场计算  

Calculation of three-dimensional ion current field of 500 kV AC line crossing ±800 kV DC line

作　　者：蓝天[1] 刘永聪 何旺龄 鲁海亮[1] 梁倩旖 蓝磊[1] LAN Tian;LIU Yongcong;HE Wangling;LU Hailiang;LIANG Qianyi;LAN Lei(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;School of Electrical and Electronic Engineering,North China Electric Power University,Baoding 071003,China)

机构地区：[1]武汉大学电气与自动化学院,湖北武汉430072 [2]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《武汉大学学报（工学版）》2022年第2期175-182,共8页Engineering Journal of Wuhan University

摘　　要：为了保证交直流线路交叉钻越区域的混合电场不超过安全限值,建立了500 kV交流线路钻越±800 kV直流输电线路区域的三维离子流场仿真模型,分析了钻越区交流线路对直流离子流场的影响,基于有限元方法计算了不同高度下线路钻越区的合成电场、离子流密度分布规律及混合电场电磁环境指标。研究表明,钻越区交流线路对直流离子流场具有一定的屏蔽作用;500 kV交流线路同等对地高度下,去地线钻越±800 kV直流线路情况与有地线情况,均在线路最小对地高度大于等于14 m时满足混合电场安全限值的要求。该模型及研究成果可为制订超高压钻越特高压线路典型方案提供参考。In order to meet the requirement of mixed electric field safety limits in the AC/DC lines crossing area, a three-dimensional ion current field simulation model of a 500 kV AC line crossing a ±800 kV DC transmission line area was established in this paper. The influence of AC lines on the DC ion current field in the crossing area was analyzed, and the finite element method was used to calculate the total electric field, ion current density distribution laws and the mixed electric field electromagnetic environment index of the crossing area at different line heights. The research shows that the AC line in the crossing area has a certain shielding effect on the DC ion current field. At the same height of 500 kV line, the cases of AC line crossing ±800 kV DC line with and without ground wire both meet the requirement of mixed electric field safety limits, when the line minimum height is higher than or equal to 14 m. The model constructed and the research results in this paper can provide a reference for making typical schemes for UHV line crossing.

关 键 词：线路钻越 三维离子流场 电磁环境 有限元法 

分 类 号：TM15[电气工程—电工理论与新技术]