共走廊架设超/特高压输电线路电场分布及走廊优化研究  

Electric Field Distribution of EHV and UHV Transmission Lines Erected in Common Corridor and Research on Corridor Optimization

作　　者：石超群[1] 朱军[1] 吴静文[1] 吴驰[2] 吴广宁[1] 邱璆[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031 [2]四川电力科学研究院,四川成都610072

出　　处：《四川电力技术》2013年第4期1-5,36,共6页Sichuan Electric Power Technology

基　　金：国家电网科技项目(2011-WG-4)

摘　　要：超/特高压线路共用走廊架设时,由于导线数目多,电压等级不同,所以影响电场分布的因素较多,为了分析超/特高压输电线路共用走廊架设时线路下方的电场分布,基于等效电荷法建立了共用走廊时工频电场的计算模型,利用Matlab编制计算程序,仿真分析了共用走廊时输电线路下方距离地面1.5 m处的电场分布。重点讨论了超/特高压输电线路的相序排列、接近距离以及导线最小对地高度对整个输电走廊电场分布的影响。研究表明超/特高压共用走廊时导线的相序排列和导线最小对地高度对场强最大值有较大影响,高场强覆盖区域与接近距离成线性增长关系。结合电磁环境评估标准,提出了超/特高压共用走廊架设时建议采用的相序布置,接近距离和导线最小对地高度。The number of conductor with different voltage level is more complicated than single circuit when EHV and UHV transmission lines are erected in the common corridor, so there are many factors which will influence the distribution of electric field. The calculation model of power - frequency electric field is established based on charge equivalent method in order to analyze the distribution of electric field when using the common corridor, and Matlab is utilized to develop simulation program for the visible analysis of electric field distribution under the transmission lines at 1.5 m above the ground. The discussion lays emphasis upon some influencing factors to the distribution of electric field in the transmission corridor, such as the phase se- quence of EHV and UHV transmission lines, the approaching distance between EHV and UHV transmission lines, and the clearance of conductor to the ground. Research shows that the phase sequence and the clearance of conductor to the ground have a great influence on the maximum of electric field, and there is a linear growth relationship between high - intensity cov- erage area of electric field and the approaching distance. Finally, the suggested phase sequence, approaching distance and clearance of conductor to the ground when EHV and UHV transmission lines are erected in the common corridor are proposed according to the criterion of electromagnetic environmental evaluation.

关 键 词：等效电荷法 共用走廊 工频电场 相序布置 接近距离 对地高度 

分 类 号：TM711[电气工程—电力系统及自动化]