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Method and system for testing error of correction field of peer-to-peer transparent clock, and clock tester

A clock tester, transparent clock technology, applied in transmission systems, digital transmission systems, electrical components, etc.

Inactive Publication Date: 2012-04-25
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no mature test method and supporting system for correcting domain errors of peer-to-peer transparent clocks

Method used

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  • Method and system for testing error of correction field of peer-to-peer transparent clock, and clock tester
  • Method and system for testing error of correction field of peer-to-peer transparent clock, and clock tester
  • Method and system for testing error of correction field of peer-to-peer transparent clock, and clock tester

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Experimental program
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Effect test

Embodiment Construction

[0023] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] Example of test system

[0025] like figure 1 The test system shown is composed of a clock tester, two optical fibers of equal length and same sex, a peer-to-peer transparent clock to be tested, and a computer with test and analysis software installed in the background. The two optical fibers are used to connect the corresponding ports of the clock tester and the peer-to-peer transparent clock to be tested. The reason why they are equal in length is to facilitate the calculation in the next step.

[0026] Embodiment of test special clock tester

[0027] Generally, the clock tester for the purpose of measuring the time synchronization accuracy can generally support the synchronization accuracy measurement of the PPS, IRIG-B, NTP and other output time signals of the device under test. The clock tester usually has a built-i...

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Abstract

The invention relates to a method and system for testing an error of a correction field of a peer-to-peer transparent clock, and a clock tester. The system comprises the clock tester connected with the peer-to-peer transparent clock to be tested, wherein the clock tester is provided with a master clock port and a slave clock port; the master clock port and the slave clock port are connected with two ports of the peer-to-peer transparent clock to be tested respectively through two optical fibers; the master clock port is used for sending a synchronous message; the slave clock port is used for receiving the synchronous message; and the clock tester is also connected with a background computer for analyzing information acquired by the clock tester. Based on the clock tester which supports an IEEE1588-2008 protocol, the frequency modulation effectiveness of the peer-to-peer transparent clock and the correctness of the correction field calculated by the peer-to-peer transparent clock are analyzed through performing linear regression analysis and distributed analysis on a plurality of groups of test data by the background computer with statistical analysis software.

Description

Technical field [0001] The invention is the field of relay protection automation in power engineering. It specifically involves the test method of the equivalent transparent clock school error based on the IEEE 1588 accurate time protocol. The test system and the special clock tester are tested. Background technique [0002] There are many clock synchronization methods, such as SNTP, IEEE 1588 and so on.In the process of promoting the smart substation, the IEC 61850 and other standards have been widely accepted. IEEE1588 is already the mainstream clock synchronization technology in the sampling duty, Goose message, and IEEE1588 packet "three networks" model. [0003] In the IEEE1588-2008 protocol, the concept of transparent clock was introduced. The transparent clock was first called by the bypass clock, which solved the problem of controlling the problem of transmission errors during the multi-level border clock-level link in IEEE1588-2002.The most important function of the tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26
Inventor 黄曙陈炯聪宋小会崔全胜魏勇余南华梁晓兵谈树峰沈沉宋一丁
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID