糯扎渡-广东±800kV直流输电线路导线选型  

Conductor Schemes for ±800 kV UHVDC Transmission Line of Nuozhadu-Guangdong

作　　者：薛志方[1] 程思勇[1] 何民[1] 钟谦[1] 黄文京[1] 卢本初[1] 

机构地区：[1]广西电力工业勘察设计研究院,南宁530023

出　　处：《高电压技术》2009年第10期2344-2349,共6页High Voltage Engineering

摘　　要：为了解决糯扎渡送电至广东的±800kV直流输电线路的导线选型问题,需要综合考虑导线方案的电磁环境指标、机械特性和经济性等。为此,采用解析法特别研究了较优导线方案6×LGJ-630/45和6×LGJ-720/50的地面合成场强和离子流密度横向分布特性,通过数值仿真的手段揭示了地面场强和离子流密度的随线路参数的变化规律;采用关联式计算导线的可听噪声和无线电干扰特性;根据工程的气象条件,验算了覆冰过载能力;最后采用年费用法对两种方案进行了技术经济比较。结果显示,6×LGJ-720/50在电磁环境指标方面优于6×LGJ-630/45,但6×LGJ-630/45在经济性方面稍优于6×LGJ-720/50。For the Nuozhadu-Guangdong ±800 kV UHVDC transmission line project, the optimal selection of conductor schemes is an important and sophiticatedproblem for transmission line design. According to the feasibility investigation, 6 × LGJ-630/45 and 6 × LGJ-720/50 are the two conductor schemes more appropriate than others. Based on the analytical mathematical model and numerical algorithm proposed, the laws how the line parameters influence the total electric field and ion flow density on ground were revealed in detail. Empirical correlations were used to evaluate respectively audible noise and radio interference characteristics. Comparision of cost-effectiveness was carrried out in term of the annual cost. The results show that 6 × LGJ-720/50 gains the advantage over 6 × LGJ- 630/45 in electromagnetic environmental index, but 6 × LGJ-630/45 is more economical than 6 × LGJ-720/50.

关 键 词：特高压直流 输电线路 导线 电磁环境 合成场强 可听噪声 无线电干扰 

分 类 号：TM726.1[电气工程—电力系统及自动化] TM721.1