四相输电系统的短路故障分析  

FAULT FOUR-PHASE POWER TRANSMISSION SYSTEM ANALYSIS

作　　者：刘光晔[1] 杨以涵[2] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082 [2]华北电力大学电力系,北京100085

出　　处：《中国电机工程学报》2002年第6期47-51,共5页Proceedings of the CSEE

摘　　要：多相输电是提高输送功率密度的重要方法。四相架空输电线路对称性好,线路及杆塔结构简单,在多相输电线路中具有独特的优势。四相输电系统的故障分析,是研究四相输电理论的一项重要内容。在对称分量的坐标系中,四相输电系统不对称故障有一部分边界条件不能与复合序网对应,必须将边界条件与网络方程联立求解。由于方程数目较多,求解过程复杂,不能形成四相系统故障分析的一般方法。该文分析了在克拉克坐标下四相系统各类短路故障的边界条件,建立了相应的复合克拉克网络,并给出了所有简单短路故障情况下故障处的短路电流计算结果。High phase order power transmission is an important method to increase the power density transmitted. Four-phase overhead transmission lines have special advantages in high phase order transmission lines, because of the good symmetry and the simple structure of its lines and poles. Four-phase transmission system fault analysis is one of the important studies on four-phase transmission system theory. In symmetrical components coordinates, a part of boundary conditions of unsymmetrical faults in four-phase transmission systems may not correspond to simple interconnection of sequence networks, the boundary conditions must be solved with together networks equations. The solving process is complicated because of large number of equations. So a general method can not be established for unsymmetrical fault analysis of four-phase power transmission systems. In this paper, the boundary conditions of all types of four-phase system short circuit faults are discussed in Clarke coordinate. The corresponding interconnection of Clarke networks are proposed for fault four-phase transmission system analysis and short circuit currents at the fault point have been calculated for simple short circuit faults.

关 键 词：四相输电系统 短路 故障分析 

分 类 号：TM721[电气工程—电力系统及自动化]