智能变电站光纤纵差保护装置同步方案比较  

Comparison of fiber current differential protection synchronization schemes for smart substation

作　　者：潘济猛[1] 孙永先[2] 申狄秋[1] 郭乐[2] 丁泉[2] 

机构地区：[1]中国南方电网超高压输电公司柳州局,广西柳州545006 [2]国电南京自动化股份有限公司,江苏南京210003

出　　处：《电力自动化设备》2010年第9期101-104,共4页Electric Power Automation Equipment

摘　　要：针对智能变电站中电流的采集与处理分装置、分CPU的特点,结合采样时刻调整法,提出了3种线路光纤纵差保护装置采样同步方案:同步源、锁相环、插值同步。就每种同步方案从适用场合、实现原理以及优缺点等方面进行了详细的分析比较。最后得出结论:同步源方案因为对同步源装置的依赖而具有一定的使用局限性;锁相环方案抗报文抖动性较强,适用于采样值组网方式;而插值同步方案适用于智能变电站中合并单元与保护装置的点对点方式。As the current sampling and processing are implemented in two equipments with CPU in smart substation,three synchronization schemes based on sampling time adjustment are proposed for the fiber current differential protection：synchronous source,phase-locked loop and interpolation synch.Each is analyzed in the applicable occasions,implementation principles,advantages and disadvantages.The conclusion is that,the synchronous source has limited applications because of its dependency on synchronizer,the phase-locked loop is suitable for sampling value networking because of its immunity from network disturbance,and the interpolation is suitable for the point-to-point mode between merging unit and protection in smart substation.

关 键 词：智能变电站 光纤纵差保护 同步采样 锁相环 插值 点对点方式 

分 类 号：TM77[电气工程—电力系统及自动化]