HVDC输电线路合成场强解析计算方法研究Research on Analytic Calculation of Total Electric Field around HVDC Transmission Lines
龙晓慧,罗栋梁
LONG Xiao-hui,LUO Dong-liang
摘要(Abstract)：
为研究和确定高压直流输电线路的电磁环境影响及电晕损耗,分析了高压直流线路周围的合成场强,根据Deutseh假设,认为空间电荷不影响场强的方向,只影响其大小,从而把合成场强的二维计算变为以电位为变量的函数一维计算。利用欧拉法求解描述电力线的微分方程,并对微分方程边界条件做了修改,使得电力线更为完整。给出了解析方法的地面合成场强计算的详细步骤,研究了次导线半径、次导线分裂间距,正、负极导线间距和导线高度对地面合成场强大小及分布的影响。通过与实验模型的测试结果对比,验证了算法在工程上的有效性和实用性。
In order to research and define electric-magnetic environment effect and corona loss on HVDC transmission line,the total electric field around HVDC transmission line is discussed.Based on Deutseh's assumption,it is considered that space charge influence not the direction of electric field,but magnitude.Thus,two-dimension calculation about the total electric field is changed to one-dimension calculation about function,which uses electric potential as variable.Using Euler's method to solute differential equation about description power-line,and modify the boundary conditions to make power-line complete.The paper introduces analytic method about the detailed procedure of calculation the total electric field above ground,and researches its effect on radius、split spacing of sub-conductor,positive and negative spacing of conductor,altitude of conductor.
关键词(KeyWords)：
高压直流;输电线路;合成场强;解析法;欧拉法
HVDC;transmission line;total electric field;analytic method;Euler's method
基金项目(Foundation):
作者(Author):
龙晓慧,罗栋梁
LONG Xiao-hui,LUO Dong-liang
DOI: 10.19585/j.zjdl.2008.03.003
参考文献(References)：
- 赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2004.
- 万保权,邬雄,张广州,等.500kV输变线路和变电站电磁环境参数测量研究[R].武汉:武汉高压研究所,2005.
- 侯远航,邬雄,万保权,等.±500kV直流线路极导线垂直排列的合成场强[J].高电压技术,2005,31(5):37-38,57.
- Gary B.Johnson.Degree of corona saturation for HVDCtransmission lines[J].IEEE transactions on power deliv-ery,1990,5(2):695-703.
- Vinay Jaiswal,MJoy Thomas.Finite element modeling ofionized field quantities around a monopolar HVDCtransmis-sion line[J].Journal of Physics D:Applied physics,2003,36:3089-3094.
- Al-Hamouz,Zakariya M..Corona power loss,electric field,and current density profiles in bundled horizontal and verti-cal bipolar conductors[J].IEEEtransactions onindustry ap-plications,2002,38(5):1182-1187.