High Precision GPS Clock Synchronization Method Based on Time Different Compensation

2015 ◽  
Vol 713-715 ◽  
pp. 1373-1376
Author(s):  
Xue Ming Zhai ◽  
Lei Yang ◽  
Liang Yang
Keyword(s):  
Power System ◽  
High Precision ◽  
Software Design ◽  
Simultaneous Measurement ◽  
Time Synchronization ◽  
Clock Synchronization ◽  
Synchronization Method ◽  
Gps Satellites ◽  
Simulation Results ◽  
Better Than

In order to solve the issues of time synchronization that occurs in simultaneous measurement in power system, designing a GPS clock synchronization method based on time different compensation which can guarantee high-precision whether the GPS satellites are locked or not. The paper provides the basic idea describe and the overall hardware and software design. Simulation results show that the scheme provides second pulse with error in 0.8μs when GPS is locked and provides second pulse with error in 7μs when GPS is unlocked for 12 hours. The accuracy is better than the existing references.

Research on Key Technology of Time Synchronization Network in Electric Power System

2015 ◽  
Vol 1092-1093 ◽  
pp. 332-336
Author(s):  
Hong Zhang Xiong ◽  
Xi Chen ◽  
Ling Teng ◽  
Qiang Gao ◽  
Yang Wang
Keyword(s):  
High Precision ◽  
High Performance ◽  
Large Scale ◽  
Time Synchronization ◽  
Clock Synchronization ◽  
Electric Power System ◽  
Normal Operation ◽  
Synchronization System ◽  
Performance Time ◽  
Precision Clock

Development of intelligent grid have increasing demands for time synchronization, high precision, large scale, high performance time synchronization system has become necessary guarantee for the normal operation of the power grid. This article introduced the composition of the time synchronization system, discusses the IEEE1588 implementation of high precision clock synchronization principle and SDH data transmission principle, analysis of the PTP protocol for transmission through the principle of the SDH E1 line, gives the networking scheme of PTP over the E1 way, which meet the precision requirement of 1 us.

Design and Implementation of IEEE 1588 High Precision Clock Synchronization Based on GPS Time Service

2012 ◽  
Vol 532-533 ◽  
pp. 292-296 ◽  
Author(s):  
Kang Wang ◽  
Yong Hui Hu ◽  
Zai Min He ◽  
Hong Jiao Ma
Keyword(s):  
High Precision ◽  
Time Synchronization ◽  
Clock Synchronization ◽  
Time Service ◽  
Ieee 1588 ◽  
Design And Implementation ◽  
Nanosecond Range ◽  
Application Fields ◽  
Timing Requirement ◽  
Precision Clock

In view of PTP high precise timing requirement for many application fields, GPS time service is provided with the advantages of high precision and high stabilization. The principle and timescale of PTP based on GPS are analyzed and discussed. And then a PTP time synchronization platform with GPS-based UTC time is designed and implemented, the correlative key design flowchart is described as well. Finally, the paper gives the experiment results, which show the time synchronization accuracies can reach nanosecond range.

scholarly journals A High-Precision Energy-Efficient GPS Time-Sync Method for High-Density Seismic Surveys

2020 ◽  
Vol 10 (11) ◽  
pp. 3768
Author(s):  
Ruyun Tian ◽  
Junjie Zhang ◽  
Shuai Zhang ◽  
Longxu Wang ◽  
Hongyuan Yang ◽  
...  
Keyword(s):  
High Precision ◽  
Seismic Data ◽  
Energy Efficient ◽  
Time Synchronization ◽  
High Density ◽  
Seismic Survey ◽  
Data Synchronization ◽  
Synchronization Method ◽  
Synchronization Accuracy ◽  
Synchronization Performance

Large numbers of seismic channels and high-density energy-efficient acquisition systems are the development trend of seismic instruments and have attracted high R&D interests in recent years. The combination of remote sensing and wireless sensor network technology provides superior observation capabilities for high-density seismic exploration. However, large-scale and multi-node acquisition methods place higher requirements on time synchronization performance. Seismic data with poor time synchronization will cause considerable errors in the interpretation of seismic data and even have no practical significance. Thus, the strict time synchronization performance is the prerequisite and basis for the application of cable-less storage seismograph in high-density seismic array applications. The existing time synchronization methods have high power consumption and poor time synchronization accuracy, which is not suitable for the long-time task. In addition, these methods are affected by the number of nodes and the distance. This paper presents an energy-efficient time-sharing indexed interpolation intercept method for the seismic data synchronization. The time synchronization method uses the high-precision TCXO as the main clock and records GPS time in the SD card at intervals to achieve the high-precision time-stamp for the seismic data. Then the seismic data is intercepted intermittently based on precise time stamps, which achieves the strict seismic data synchronization. Performance analysis shows that the time synchronization accuracy of the proposed method is 0.6 μs and saves 73% energy of the time-sync periods compared to the common GPS timing method. The field measurement results indicate that the time synchronization accuracy is not associated with the working time and the distance between nodes so that the proposed synchronization method is suitable for the high-density seismic survey.

scholarly journals A clock synchronization method in power dispatching based on BeiDou navigation system

2021 ◽  
Vol 2108 (1) ◽  
pp. 012092
Author(s):  
Hongbo Lian ◽  
Xingcai Wang ◽  
Shuo Zhang
Keyword(s):  
Power System ◽  
Full Advantage ◽  
Navigation System ◽  
Field Programmable Gate Array ◽  
Time Synchronization ◽  
Clock Synchronization ◽  
Internal Clock ◽  
Improved Method ◽  
Field Programmable ◽  
Power Dispatching

Abstract This paper introduces the problems of poor signal condition of a single time source in time synchronization or error in time source switching in the power system. It adopts the two-clock mode timing scheme of BeiDou 2 synchronous satellite and GPS synchronous satellite to ensure the stable output of the main clock within a certain accuracy. The system takes full advantage of the field programmable gate array (FPGA) hardware method, aligns the internal clock lock signal with the input second pulse phase, and proposes an improved method for the problem of large clock synchronization deviation based on the network, which proves the effectiveness and superiority of the system to accurately output the pulse and provide reliable time synchronization for the power dispatching system.

Research on High Precision Time Information Transmission Method

2012 ◽  
Vol 468-471 ◽  
pp. 3072-3075
Author(s):  
Guo Ping Zhou ◽  
Ji Cheng Zhang
Keyword(s):  
Power System ◽  
Transmission Line ◽  
Information Transmission ◽  
High Precision ◽  
Time Synchronization ◽  
Clock Pulse ◽  
Transmission Method ◽  
Synchronization System ◽  
Precision Time ◽  
Time Information

Time synchronization system has been widely used in power system. According to the needs of different system, it provides different signals. Usually you can use a GPS clock pulse, serial message, IRIG-B yards and so on. B code contains both plus and serial time message .And the traditional equipment is often used pulse and serial message at the same time. We put forward a method to transmit pulse information and serial message information on a transmission line .And at receiving place, it can restore the signals. It can reduce line costs and outside interferences, is beneficial to the optimization of system.

Research of a High Precision Time Synchronization Method Based on GPS Calibration

2014 ◽  
Vol 644-650 ◽  
pp. 1477-1480
Author(s):  
Bu Xin You ◽  
Jing Bu ◽  
Ming Hui Yin ◽  
Yun Zou
Keyword(s):  
Power System ◽  
High Precision ◽  
Time Synchronization ◽  
Least Squares Method ◽  
Generalized Least Squares ◽  
Measuring Instruments ◽  
Random Errors ◽  
Crystal Oscillator ◽  
Precision Measuring ◽  
Fitting Method

With the higher requirement for clock accuracy in power system, the accuracy and stability of wild area punctuality in GPS cannot meet the demands of the high–precision measuring instruments in power system. Firstly, this paper establishes the mathematical model of crystal oscillator clock error using polynomial fitting method. Then, it estimates the parameters of polynomial model with generalized least squares method. Thirdly, it updates the error-model of crystal oscillator clock dynamically for modifying its predicted error. The result shows, this method can not only predict accurate time error, but also filter out random errors well in GPS.

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