±800kV特高压直流线路采用5分裂导线的电磁环境特性分析  

Electromagnetic Environment Profile of ±800 kV UHVDC Transmission Lines Using 5 Bundled Conductors

作　　者：施春华[1] 朱普轩[1,2] 蒋剑 邹军[1] 袁建生[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]甘肃省电力设计院,兰州730050

出　　处：《高电压技术》2011年第3期666-671,共6页High Voltage Engineering

基　　金：铁道部科技研究基金~~

摘　　要：为了提高特高压直流输电线路的输送容量、优化线路周围的电磁环境、压缩输电线路走廊宽度,一般采用分裂导线。采用逐次镜像法、有限元、BPA和CISPR的经验公式等方法计算5×LGJ-1120/50和6×LGJ-900/40导线方案的导线表面电场强度、地面离子流密度、可听噪声以及无线电干扰等电磁环境与电气参数,并计算电阻损耗和输电线路年费用以比较5×LGJ-1120/50和6×LGJ-900/40两种导线方案的优缺点。计算结果表明:在导线总截面大致相当的情况下,两种导线方案均能满足电磁环境限值要求,同时5×LGJ-1120/50导线方案的电阻损耗和年费用更小,其在输电线路建设投资以及运行成本等方面具有较强经济优势。Bundle conductors are widely used in the high voltage direct current（HVDC） power transmission in order to possess a higher line capacity,to optimize the electromagnetic environment,and to narrow down the width of transmission line corridor.By the use of successive image method,the finite element method and formula of BPA and CISPR,the total field,ion current density,audible noise,radio interference,and corona loss of two kinds of conductors,i.e.,5×LGJ-1120/50 and 6×LGJ-900/40 were assessed,respectively.The technical advantages and disadvantages were compared in detail.The results show that both 5×LGJ-1120/50 and 6×LGJ-900/40 can meet the requirements of the electromagnetic environment under the condition that the cross section area of both conductors are approximately same.However,it is worth pointing out that the conductor with 5×LGJ-1120/50 is more competitive than that with 6×LGJ-900/40 if the investment of the power line is concerned.

关 键 词：特高压直流 电磁环境 合成场强 离子流密度 可听噪声 无线电干扰 分裂导线 电晕损耗 电阻损耗 

分 类 号：TM723[电气工程—电力系统及自动化]