Method and device for generating high-precision synchronous clock

A technology for synchronizing clocks and clocks, applied in time division multiplexing systems, electrical components, multiplexing communications, etc., can solve the problems of complex calculation of compensation schemes, large amount of sample data, and low real-time performance, and achieve high time Stability and synchronization, the realization process is simple, and the effect of high synchronization

Inactive Publication Date: 2012-07-25
CHENGDU FUHE POWER AUTOMATION COMPLETE EQUIP
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Problems solved by technology

However, the calculation of the compensation scheme of this method is more complicated, and the amount of sample data is larger, which has higher requirements on the computing power of the CPU.
In addition, in the new method of GPS high-precision synchronous clock generation based on

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  • Method and device for generating high-precision synchronous clock
  • Method and device for generating high-precision synchronous clock
  • Method and device for generating high-precision synchronous clock

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[0025] In order to facilitate those skilled in the art to further understand the present invention, clearly understand (record, explain) the technical solutions of the present invention, and fully and fully disclose the relevant technical content of the present invention, the specific embodiments of the present invention are described below with reference to the accompanying drawings. The detailed description, of course, the specific embodiments described only list a part of the embodiments of the present invention, rather than all the embodiments, to help understand the present invention and its core ideas.

[0026] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work, and / or without departing from the spirit and essence of the present invention, even if each step is executed The sequence has been changed, and various corresponding changes and modifications have been made according to the pre...

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Abstract

The invention discloses a method and device for generating a high-precision synchronous clock. The method is used for generating and outputting a second second impulse synchronizing with a first second impulse of a first clock source. The method comprises the steps of: comparing phase relations of the second second impulse and the first second impulse; regulating a frequency division factor according to the phase relations; and controlling the quantity of impulses of a crystal oscillator corresponding to the second second impulse according to the frequency division factor to output the second second impulse. The device comprises a phase comparing unit, a PID (Proportion Integration Differentiation) control unit and a synchronizing signal output unit. According to the invention, the frequency division factor of the crystal oscillator second clock is controlled through measuring the phase different between a GPS second clock and the crystal oscillator second clock, and a cumulative error of the crystal oscillator second clock is eliminated in real time, thus a high-precision second clock is generated. The invention has the advantages of good stability, high synchronism and simple implementation process.

Description

technical field [0001] The invention belongs to the technical field of synchronous control, in particular to a method and device for generating a synchronous clock. Background technique [0002] Global Positioning System (GPS) synchronous clock has been widely used in power system, and people are exploring various new methods to develop power system monitoring, protection and control by utilizing its excellent time synchronization performance. At present, power grid fault analysis requires the time information of each microcomputer device to be accurate within 1 ms, the phase measurement of the power grid requires clock accuracy as high as microseconds, and the clock accuracy requirements for traveling wave ranging and traveling wave protection reach 1 μs or even higher. . The clock of the satellite positioning system, such as the Global Positioning System (GPS), as a navigation, timing and positioning system, has the characteristics of high timing accuracy, free of charge ...

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Application Information

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IPC IPC(8): H04J3/06
Inventor 李延陈泽青赵尔劲
Owner CHENGDU FUHE POWER AUTOMATION COMPLETE EQUIP
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