CAJ | 학술논문

为了解决糯扎渡送电至广东的±800 kV直流输电线路韵导线选型问题,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.
위료해결나찰도송전지엄동적±800 kV직류수전선로운도선선형문제,수요종합고필도선방안적전자배경지표、궤계특성화경제성등.위차,채용해석법특별연구료교우도선방안6×LGJ-630/45화6×LGJ-720/50적지면합성장강화리자류밀도횡향분포특성,통과수치방진적수단게시료지면장강화리자류밀도적수선로삼수적변화규률;채용관련식계산도선적가은조성화무선전간우특성;근거공정적기상조건,험산료복빙과재능력;최후채용년비용법대량충방안진행료기술경제비교.결과현시,6×LGJ-720/50재전자배경지표방면우우6×LGJ-630/45,단6×LGJ-630/45재경제성방면초우우6×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.