CAJ | 학술논문

对同塔四回路输电线的三维空间电磁干扰问题进行分析，包括其考虑弧垂影响时的三维空间电磁场的计算、相间距等因素对电场和磁场的影响以及回路间的耦合干扰问题。研究了在考虑弧垂影响时同塔四回路输电线的三维电磁场计算模型。以重庆地区一条现有110kV同塔四回线路为例，计算其三维电场与磁场的分布，并与其二维空间的电场与磁场进行比较。结果表明：采用二维模型计算的输电线的工频电场与磁场，与三维空间下电场与磁场计算结果的误差分别为11．2％与7．1％。分析了同塔四回路线路各个回路相间距对工频电磁场的影响，结果表明，对于同塔四回路输电线，在安全允许的条件下，相间距越小，其工频电磁场越小，传输功率越大，建议在城市电网的增容改造中，采用紧凑型四回路输电线。当四回线路中1个回路出现故障时，分析了其对杆塔同侧线路的耦合干扰。
대동탑사회로수전선적삼유공간전자간우문제진행분석，포괄기고필호수영향시적삼유공간전자장적계산、상간거등인소대전장화자장적영향이급회로간적우합간우문제。연구료재고필호수영향시동탑사회로수전선적삼유전자장계산모형。이중경지구일조현유110kV동탑사회선로위례，계산기삼유전장여자장적분포，병여기이유공간적전장여자장진행비교。결과표명：채용이유모형계산적수전선적공빈전장여자장，여삼유공간하전장여자장계산결과적오차분별위11．2％여7．1％。분석료동탑사회로선로각개회로상간거대공빈전자장적영향，결과표명，대우동탑사회로수전선，재안전윤허적조건하，상간거월소，기공빈전자장월소，전수공솔월대，건의재성시전망적증용개조중，채용긴주형사회로수전선。당사회선로중1개회로출현고장시，분석료기대간탑동측선로적우합간우。
In order to solve the growing urban grid load and the growing tension in the land resources, more and more four-circuits transmission lines have been built in China. In the paper, the calculation of electric field and magnetic field considering the influence caused by the sag is investigated. To a- void the shortcoming in current calculation method, the method to analyze the influence caused by the transmission lines sag is presented in the paper. A 110 four-circuits transmission lines in Chongqing was taken as an example, the electric field and magnetic field in 2D space and 3D space were calcu- lated respectively, and comparison was conducted. Results indicate that the electric and magnetic fields obtained in 2D space have an error of 11.2% for electric field, and 7.1% for magnetic field.In addition, because of the change of the parameters of multi-circuit transmission line, the interfer- ence between different loops in one tower is analyzed, and results indicate that the interference be- tween different loops should be calculated for line accident.