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.
出处
《电力自动化设备》
EI
CSCD
北大核心
2010年第9期101-104,共4页
Electric Power Automation Equipment
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
smart substation
fiber current differential protection
synchronous sampling
phase-locked loop
interpolation
point-to-point mode
