同杆4回线12序分量法

Twelve-sequence Component Method of Four-parallel Lines on Same Towers

同杆4回线在节省线路占地的同时,带来了测距和继电保护等方面的困难。文中针对同杆4回线难以解决的线间耦合问题进行了大量研究。使用矩阵变换将耦合的线路进行解耦,形成相互独立的12序分量。详细研究了这12序分量的特点,并给出了线路发生故障时的各序分量图。12序分量法不仅可以成为同杆4回线故障计算的基本方法,还为同杆4回线的测距和保护打下了理论基础。EMTP仿真结果表明了12序分量法的精确性。

Four-parallel transmission lines reduce the required space of right-of way of transmission. However, technical difficulties, such as fault location and relay protection, occur in practice. Twelve-sequence component method is introduced to decouple mutual electromagnetic effect between four-parallel transmission lines. The twelve-sequence components are independent from each other. The characteristics of the twelve-sequence components are studied and the related sequence networks are introduced. The twelve-sequence component method can not only be the basic method of the fault analysis but also the basic theory of the fault location and relay protection for the four-parallel lines. Large amount of simulation results of EMTP simulation demonstrate that the twelve-sequence component method is correct and valid for fault analysis.