基于数字锁相环的改进版高精度同步时钟

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英文篇名：An Improved Version of High Precision Synchronous Clock Based on Digital Phase-locked Loop 作者：舒磊 ; 孙碧莲 ; 徐晾 ; 左浩鑫 ; 王凯 英文作者：SHU Lei;SUN Bilian;XU Liang;ZUO Haoxin;WANG Kai;State Grid Ningbo Power Supply Company; 关键词：时间同步 ; 卫星时钟 ; 晶振时钟 ; 锁相环 英文关键词：time synchronization;;satellite clock;;crystal oscillator clock;;phase-locked loop 中文刊名：DGJY 英文刊名：Electric Engineering 机构：宁波供电公司; 出版日期：2018-06-10 出版单位：电工技术 年：2018 期：No.473 语种：中文; 页：DGJY201811008 页数：4 CN：11 ISSN：50-1072/TM 分类号：25-28

摘要

针对现有卫星时钟在可靠性方面存在的问题,研究了一种基于数字锁相环的改进版高精度同步时钟。该方法不仅在卫星正常接收时能产生集较小累积误差和随机误差的高精度修正秒脉冲,而且在卫星非正常接收时可依据历史数据形成高精度的同步脉冲。试验测试表明,该方法能输出高精度的同步时钟,较好地满足了电力系统对时间精度的要求。
        With the rapid development of the power industry,the smart grid has put forward higher requirements for time synchronization.However,the existing satellite clock is difficult to apply to the protection and control of power system and other areas with high reliability.Therefore,an improved version of high precision synchronous clock based on digital phase-locked loop is studied in this paper.When the satellite signal is in normal receiving state,this method produces a high precision correction second pulse with little accumulative error and random error,on the contrary,high precision synchronous pulses can be formed on the basis of historical data.The test results show that this method can output the high precision synchronous clock,which can meet power system′s requirement for time precision.

引文

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