基于环流分量的同塔四回输电线路单回线故障选线新方法  

New Single-Line Faulted Selecting Method for Four-Parallel Transmission Lines on the Same Tower Based on Loop Flow Component

作　　者：郭培育[1] 邰能灵[1] 于仲安[1] 范春菊[2] 

机构地区：[1]江西理工大学电气工程与自动化学院,赣州341000 [2]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《电工技术学报》2015年第24期206-214,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51177066;51377104)

摘　　要：通过分析同塔四回线12序分量特性,提出基于环流分量的故障选线新方法。该方法首先根据不同回线故障时各环流量之间的幅值与相位关系,构造环流差量。通过研究环流分量及环流差量间相位关系在不同回线故障条件下相差180°的变化特征,可实现准确选线的目的。以较普遍的参数不对称同塔四回线输电线路为模型,结合不同回线故障时的边界条件,对各回线故障时序分量间相位关系进行分析。利用不同回线故障时序分量间相位关系不同的特点,提出一种不受负荷电流影响的同塔四回线选线方法。PSCAD/EMTDC仿真验证了上述所提新选线方法的准确性与有效性。According to on the analysis of the characteristics of twelve-sequence components, a new fault line selection method based on loop flow component is proposed for the four-parallel transmission lines（FPL） on the same tower. This method firstly establishes the circulating current difference component, depending on the relationship between magnitude and phase of the loop flow components under various lines faults. By analyzing the charging feature that the phase difference between loop flow component and circulating current difference component is 180, the fault line can be identified. A commonly adopted asymmetric parameter model of FPL is also discussed. According to the boundary conditions of different transmission line faults, the phase relationship among the sequence components is deduced. Based on this principle that the phase relationship different when the fault line is different. The new method for identifying the fault line is presented. The new method is not affected by the system impedances. Simulation results of PSCAD/EMTDC verify the proposed fault line selection method.

关 键 词：同塔四回线 故障选线 12序分量法 环流分量 序分量 

分 类 号：TM77[电气工程—电力系统及自动化]