A Time Synchronization Method for Distributed Relay Protection Devices

A relay protection device and time synchronization technology, which is applied in the field of electric power communication, can solve the problems of time scale discrete performance host and sub-machine, etc., and achieve the effect of improving stability and reliability

Active Publication Date: 2020-10-16
INTEGRATED ELECTRONICS SYST LAB
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to provide a time synchronization method for a distributed relay protection device, aiming to solve the problem of large fluctuations in the discrete performance of the time scale in the time synchronization process in the prior art and the inability of the master and slave to perform The problem of high-precision time synchronization improves the stability of the sampling value sending cycle, and does not require external GPS signals to improve the reliability of relay protection

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  • A Time Synchronization Method for Distributed Relay Protection Devices
  • A Time Synchronization Method for Distributed Relay Protection Devices
  • A Time Synchronization Method for Distributed Relay Protection Devices

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Embodiment Construction

[0037] In order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily lim...

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Abstract

The invention provides a time synchronization method of a distributed relay protection device. According to the invention, accurate second edge positioning is realized between the main machine and thesub-machine by using the crystal oscillator counter. The calculation of the next second interval, the next second sampling value sending interval and the next second remainder averaging interval is realized through a second interval calculation method and a remainder averaging algorithm in the second interval. The problems that in the time synchronization process, the discrete performance of timescales fluctuates greatly, and high-precision time synchronization cannot be carried out between a host and a sub-machine when no GPS signal exists are solved. The discrete value of the sampling value sending interval is kept at the nanosecond level through the remainder equalization algorithm in the second interval, so that the stability of the sampling value sending period is greatly improved,high-precision time synchronization between the distributed host and the sub-machine of the relay protection device can be realized without the help of an external GPS signal, and the reliability of relay protection is improved.

Description

technical field [0001] The invention relates to the technical field of electric power communication, in particular to a time synchronization method of a distributed relay protection device. Background technique [0002] With the rapid development of communication technology, the form of relay protection devices has developed from centralized to distributed. The distributed relay protection host and the distributed relay protection sub-machines are arranged in a distributed manner, work together, and share the collected data through optical fibers. High-precision time synchronization between the host and sub-machines is required to ensure high-precision data of the host and sub-machines Synchronize. [0003] In the prior art, there are two ways of time synchronization between the main unit and the sub-unit of the relay protection device: [0004] 1. Using the GPS clock of the whole station, the main unit and the sub-units are respectively connected to the GPS clock source t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06
CPCH04J3/0638
Inventor 丛春涛贺强朱晓磊林健刘鑫郝磊周文俊
Owner INTEGRATED ELECTRONICS SYST LAB
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