摘要
全球定位系统GPS(GlobalPositioningSystem)同步时钟装置已在变电站自动化系统中广泛应用。介绍了GPS同步时钟装置的结构及其功能。对串口通信校时和脉冲中断校时对校时精度的影响进行分析和比较,提出了一种综合校时方案。通过计数器构成毫秒级的计时单元,利用GPS同步时钟定时,应用在事件顺序记录SOE(SequenceOfEvents)中。介绍了软件定时和硬件定时。
The GPS(Global Positioning System) is widely used in substation automation system. The structure and function of GPS synchronous clock device are introduced. Based on the synch accuracy analysis and comparison between serial communication mode and pulse signal mode,an integrative scheme is presented. SOE(Sequence Of Events) is realized in substation automation system by applying a millisecond timer and GPS synchronous clock. Both software sync and hardware sync are introduced.
出处
《电力自动化设备》
EI
CSCD
北大核心
2004年第12期59-61,共3页
Electric Power Automation Equipment
关键词
GPS时钟
校时
事件顺序记录
GPS clock
time synchronization
sequence of events
