330kV OPGW感应电压分布计算和影响因素研究  

Induced Voltage Profile Simulation and Influencing Factors Study for 330 kV OPGW

作　　者：陈洁[1,2] 郭洁[1] 崔龙跃[1] 矫立新[1] 

机构地区：[1]西安交通大学,西安710049 [2]中国电力科学研究院,武汉430074

出　　处：《高压电器》2014年第5期93-98,共6页High Voltage Apparatus

摘　　要：330 kV输电线路架空地线采用双地线架设方式,一根为钢绞地线,一根为光纤复合地线。研究表明,地线采用分段绝缘、一点接地时电气性能优于逐塔接地和经火花间隙接地,既限制了地线上的感应电压幅值,也减小了地线感应环流及环流损耗,且具有良好的保护性能。笔者应用电磁暂态计算程序建立330 kV输电线路模型,对OPGW地线感应电压的沿线分布进行研究。研究表明,当地线采用分段绝缘、一点接地的接地方式时,绝缘分段长度越长,绝缘地线绝缘端的感应电压越高;当输电线路采用逆相序反向换位时,OPGW地线感应电压比其他导线排列方式和换位方式下的地线感应电压都小。The 330 kV transmission line employs two overhead ground wires,one is steel hinge wire and the other is optical fiber composite wire. It has been proved that a ground wire adopting the segmented insulation with onepoint earthing mode can achieve better electrical performance than adopting the segmented insulation with one-byone tower earthing mode or through spark-gap earthing mode. The segmented insulation with one-point earthing mode limits the amplitude of induced voltage on ground wire,and reduces the induced current and energy loss, which results in reliable protection performance. In this paper,a model of 330 kV transmission line is set up by making use of EMTP to investigate the induced voltage profile on OPGW. The results show that when the segmented insulation with one-point earthing mode is employed,the longer the segmented length is,the higher the induced voltage becomes. When the transmission line adopts the mode of reverse phase order disposition and reverse transposition,OPGW gets the lowest induced voltage compared with other disposition and transposition modes of conductors.

关 键 词：光纤复合地线 分段绝缘 感应电压 电磁暂态程序 

分 类 号：TM751[电气工程—电力系统及自动化]