高压直流输电线路标称电场强度计算模型  

Calculation Model for Nominal Electric Field of High Voltage DC Transmission Lines

作　　者：方覃绍阳 向小民[1] 李征航 FANG-QIN Shaoyang XIANG Xiaomin LI Zhenghang(College of Electrical Engineering ＆ Renewable Energy, China Three Gorges University, Yichang, Hubei 443002, China State Grid Zhejiang Suichang Power Supply Company, Lishui, Zhejiang 323300, China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]国网浙江遂昌县电力公司,浙江丽水323300

出　　处：《广东电力》2016年第11期128-132,共5页Guangdong Electric Power

摘　　要：针对高压直流输电线路的标称电场强度计算问题,以宜昌龙泉至常州政平的±500 kV高压直流输电线路为例,依据常用的简化计算方法,使用有限元分析软件COMSOL Multiphysics建立了四分裂导线–架空地线模型、单纯的四分裂导线模型和等效导线–架空地线模型。对3种模型进行仿真,并以四分裂导线–架空地线模型为参照,对比不同模型的标称电场强度分布。得出结论:架空地线对直流输电线路周围标称电场强度的影响很小,在工程应用中采用忽略架空地线的简化模型是可行;等效导线简化模型不适于分析线路附近的电场强度,但适于分析距离线路较远的区域且计算量大幅减少。In allusion to calculation on nominal electric field of high voltage direct current （DC） transmission lines, this paper takes ± 500 kV high voltage DC transmission line from YichangLongquan to Changzhou Zhengping for an example and uses finite element analysis software COMSOL Multiphysics to establish a bundled conductor-overhead ground wire model, a simple bundled conductor model and an equivalent conductor-overhead ground wire model according to common simplified calculation method. It carries on simulation for these three models and takes the bundled conductor-overhead ground wire model as reference for comparing distribution of nominal electric field of different models. Finally it concludes that the overhead ground wire has slight influence on nominal electric field around DC transmission lines, which means it is feasible to ignore the simplified model of overhead ground wire in engineering application. The simplified model for equivalent conductor is not suitable for analyzing electric field near to lines while it is suitable for analyzing electric field of regions far away from lines and has reduced calculating amount.

关 键 词：高压直流 标称电场 有限元法 分裂导线 架空地线 

分 类 号：TM726.1[电气工程—电力系统及自动化]