摘要
利用ATP-EMTP和MATLAB对1 000 kV特高压交流同塔双回线路的电气不平衡度和换位方式进行了研究。综合线路防雷保护和电磁环境的研究成果,所有相序布置方案下不平衡度的比较表明,不换位线路逆相序布置综合较优,异相序次之,不推荐同相序和其他相序布置。在换位方式上,与l/6—l/3—l/3—l/6换位相比,采用l/3—l/3—l/3换位可以满足要求,且换位塔数量较少。对逆相序布置,建议采用反向换位方式1;对异相序布置,建议采用同向换位方式1,一般线路一个全循环换位即可满足不平衡度要求。当一个回路运行一个回路停运时,运行回路的不平衡度符合限值规定。
Electric unbalance degree and transposing mode of 1 000 kV ultra high voltage AC（UHVAC） double-circuit on the same tower were studied with ATP/EMTP and MATLAB.As a result of comprehensive comparison including transmission lines＇ unbalance degree without conductor transposition,lightning protection and electromagnetic environment,inverse phase sequence was preferred among all of the phase sequence arrangement plans,and diverse phase sequence displayed a little worse,however,same phase sequence and other phase sequence weren＇t recommended.Compared with l/6—l/3—l/3—l/6 transposing mode,the unbalance degree of l/3—l/3—l/3 transposing mode could satisfied standards and less transposing tower was applied.Reverse transposition 1 was adopted for inverse phase sequence,while same transposition 1 was for diverse phase sequence.As to common lines,one total cycle transposition could meet the unbalance degree demand.It didn＇t exceed regulations either when one circuit energized or the other was failed.
出处
《南方电网技术》
2010年第A01期108-112,共5页
Southern Power System Technology
关键词
1000kV交流
同塔双回路
电气不平衡度
1 000 kV AC
double-circuit on the same tower
electric unbalance degree
