3种同步接口在光纤纵差保护中的设计实现  

Design and Realization of Three Kinds of Synchronous Interface in Fiber-optic Current Differential Protection

作　　者：伍小刚[1] 俞波[1] 姚吉文[1] 苏理[1] 

机构地区：[1]国电南瑞科技股份有限公司,江苏省南京市210003

出　　处：《电力系统自动化》2006年第20期77-80,共4页Automation of Electric Power Systems

摘　　要：光纤纵差保护装置采用直连方式时需配置光纤数字同步接口。当保护装置通过复接设备(脉码调制(PCM)交换机或E1复接器)进行远距离传输数据时,需配置符合G．703的同向64 kbit／s接口或2．048 Mbit／s接口(即E1接口),这2种同步接口一般在配套的光端机中实现。文中介绍了几种光纤数字同步接口和光端机的实现方案,并比较了它们的性能、实现的难易程度,提出一种可靠灵活的方案。该方案不仅完全满足同步性能,而且使光纤数字同步接口和光端机的软硬件平台保持一致;当复用通道时,光端机与光纤纵差保护装置实现了无缝配合。Fiber-optic current differential relays should be provided with a fiber-optic digital synchronous interface when directly connected. The relays should be provided with a 64 kbit/s interface or E1 interface when transmitting data through multiplexer （PCM exchangers or the E1 multiplexer）. The two kinds of synchronous interface in conformity with ITU-T G. 703 are in general realized in the fiber-optic spire. Several schemes of implementing fiber-optic digital synchronous interface and fiber-optic spire are discussed.The schemes are compared with respect to both the performance and complexity of implementation and a reliable and flexible scheme is obtained, which not only satisfies the requirement on synchronous performance completely, but also brings the software and hardware platform of the fiber-optic digital synchronous interface and the fiber-optic spire into accord. Furthermore, the fiber-optic spire is seamlessly linked with the fiber-optic current differential relay when connected with the multiplex channel.

关 键 词：光纤纵差保护 光纤数字同步接口 E1接口 FPGA 

分 类 号：TM773[电气工程—电力系统及自动化]