导线相序及换位方式对地线损耗特性的影响  

Effects of Phase Sequences and Conductor Transposition Modes on Power Loss Characteristics of Ground Wire

作　　者：蒋陶宁[1] 徐亮[1] 卞鹏[1] 贾佳[1] 康东升[1] 

机构地区：[1]国核电力规划设计研究院,北京市100032

出　　处：《电力建设》2012年第2期9-13,共5页Electric Power Construction

摘　　要：交流输电线路由于相线和地线的磁耦合而导致的地线损耗,逐渐成为电力网络经济运行的一个指标。研究者提出了多种新的地线接线方式来降低此损耗,这些措施主要包括分段绝缘和地线换位。以特高压线路为例,研究了不同相序下地线的感应电动势特性和不同导线换位方式下的地线损耗特性。指出了导线采用逆相序反向换位的方式,地线采用普通地线绝缘和换位的措施,可以最大程度降低地线损耗。The power loss of ground wire,which is produced by the magnetic coupling between phase line and ground wire,has become a more and more important index for economical operation of the power network.Various measures for reducing this loss,such as graded insulation and ground wire transposition,are put forward.Taking UHV transmission line as an example,the induced electromotive force of ground wire under different phase sequences and the power loss under different conductor transposition modes are investigated.It is shown that the conductor with negative phase sequence and reverse transposition and the ground wire with graded insulation and transposition can reduce the power loss of ground wire to a minimum.

关 键 词：相序 导线换位 地线接线方式 地线感应电流 地线损耗 

分 类 号：TM714[电气工程—电力系统及自动化]