新型多周期同步和倍频锁相的频率跟踪技术  

New Frequency Track Technology Based on Multi-cycle Synchronization and Frequency Multiplication Phase-lock

作　　者：张志文[1] 王承林[1] 王伟[1] 郭斌[1] 梁英[1] 雷园园[1] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082

出　　处：《电力系统及其自动化学报》2009年第5期119-123,共5页Proceedings of the CSU-EPSA

摘　　要：为减少同步时钟计数位数、缩短微处理器处理数据所消耗时间,达到快速测量场合下高速、高精度的测频要求,介绍了一种实时在线监测中的频率跟踪技术,它采用现场可编程门阵列实现倍频锁相,用新型多周期同步测频法跟踪频率,通过QUARTUSⅡ进行设计。实验证明:它大大减小基波波动所致计算误差,提高测量电网频率精度,保证在基频偏离工频时有效实现采样窗口与被测周期的同步,为在线监测中参量采集提供必要的依据。In order to reduce the number of bits of the simultaneous clock counting, shorten the microprocessor＇ s processing time for data consumption, and meet the requirement of the high-speed, high precision measurement of the frequency, this paper introduces a new technology of tracing network frequency in real time monitoring. The new technology uses FPGA to achieve frequency multiplication phase lock, with a new multi-cycle synchronous frequency method to track the frequency, and uses QUARTUS II to design. The experiment result proves that the calculation error is eliminated , and synchronization of sampling windows and period can be realized. The synchronization of sampling can provide correct and necessary evidenee to sample parameter in the online monitor.

关 键 词：在线监测 频率跟踪 倍频锁相 多周期同步 

分 类 号：TM76[电气工程—电力系统及自动化]