摘要
双端故障行波定位装置中通常采用卫星秒时钟信号进行同步。为消除电离层与对流层延时、接收机钟差误差和卫星钟差的影响,提出了基于频差回归-差分观测共视授时模型产生高精度同步时钟的方法。首先建立晶振秒时钟与卫星秒时钟的频差一元二次回归方程模型,实时计算得到回归方程模型回归系数的当前估计值,然后通过估计值来计算晶振秒时钟的修正值;其次采用差分观测共视授时模型建立卫星授时差分网,减小用户卫星秒时钟信号在传输过程中随机漂移误差的影响,用修正后的卫星秒时钟信号作为参数将提高晶振秒时钟与卫星秒时钟的频差回归模型的拟合精度。
The satellite second clock signal is usually used for synchronization in the two-terminal traveling wave positioning device.To eliminate the influence of ionosphere and tropospheric delay,receiver clock error and satellite clock error,a method of generating high precision synchronous clock based on frequency difference regression-difference observation common-view timing model is proposed.Firstly,the frequency difference quadratic regression equation model of crystal oscillator second clock and satellite second clock is established,and the current estimation of regression coefficient of regression equation model is calculated in real time,and the correction value of crystal oscillator second clock is calculated by estimation.The satellite timing differential network is established by using the differential observation common-view timing model to reduce the random drift error of the user s satellite second clock signal in the transmission process.The modified satellite second clock signal is used as a parameter to improve the fitting accuracy of the frequency difference regression model between the crystal oscillator second clock and the satellite second clock.
作者
雷金勇
白浩
黄秉开
袁智勇
潘姝慧
曾家琛
喻锟
LEI Jinyong;BAI Hao;HUANG Bingkai;YUAN Zhiyong;PAN Shuhui;ZENG Jiachen;YU Kun(Electric Power Research Institute,CSG,Guangzhou 510663,China;Huizhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Huizhou,Guangdong 530600,China;School of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410114,China)
出处
《南方电网技术》
CSCD
北大核心
2022年第5期54-60,共7页
Southern Power System Technology
基金
中国南方电网有限责任公司科技项目(GDKJXM 20198410)
国家重点研发计划资助项目(2017YFB0902902)。
关键词
晶振秒时钟
卫星秒时钟
共视授时
频差回归模型
高精度同步时钟
crystal oscillator second clock
satellite second clock
common-view timing
frequency difference regression model
high precision synchronous clock
