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Test method of IED network clock synchronization precision based on GOOSE mechanism

A technology of clock synchronization and test method, which can be used in synchronization devices, data exchange networks, digital transmission systems, etc., and can solve problems such as differences in test methods

Active Publication Date: 2012-01-11
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +2
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Problems solved by technology

[0005] The purpose of the present invention is to provide a test method for IED networked clock synchronization accuracy based on the GOOSE mechanism, to solve the problem of test method differences caused by different IED synchronization principles

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  • Test method of IED network clock synchronization precision based on GOOSE mechanism
  • Test method of IED network clock synchronization precision based on GOOSE mechanism
  • Test method of IED network clock synchronization precision based on GOOSE mechanism

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Embodiment Construction

[0016] The test method of the GOOSE mechanism-based IED networked clock synchronization accuracy of this patent application will be described in detail below in conjunction with the accompanying drawings.

[0017] figure 1 It is a schematic diagram of the test system. The test system is composed of a clock tester, a GOOSE source, and an IED under test. The clock tester has an accurate clock and can be used as a standard clock for testing. As an independent device, the GOOSE source can send the same 2-way GOOSE message at the same time, and record the sending time in the GOOSE message. like figure 1 As shown, two short-distance optical fibers of equal length and sameness are drawn from the GOOSE source, and the two short-distance optical fibers of equal length and sameness are respectively connected to the clock tester and the IED under test. The clock tester and the IED under test realize clock synchronization. The clock tester acts as the master clock of the system, and the...

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Abstract

The invention relates to a test method of IED network clock synchronization precision based on a GOOSE mechanism. The method is characterized in that: two short-range optical fibers, which have a same length and a same nature and are led from a GOOSE source, are respectively connected with a clock tester and an IED to be tested; the IED to be tested forms clock synchronization with the clock tester; the GOOSE source sends a GOOSE message simultaneously to the clock tester and the IED to be tested; the IED to be tested and the clock tester receive the message and respectively acquire a time label T2 and a time label T3; the IED to be tested sends the GOOSE message to the clock tester and a difference between the time label T2 and the T3 is a clock synchronization error value of the IED to be tested. Each function in the method is independent. The clock synchronization precision test of a plurality of synchronization modes, such as IEEE1588, SNTP and the like, can be realized according to demands. During the precision test, a negative effect on an IED clock synchronization process can not generated. The method can be directly applied in an intelligent transformer station clock synchronization precision test established based on an IEC61850 standard.

Description

technical field [0001] The invention belongs to the technical field of relay protection automation in electric power engineering, and in particular relates to a test method for IED networked clock synchronization accuracy based on a GOOSE mechanism. Background technique [0002] At present, there are various clock synchronization methods for intelligent substation systems and intelligent devices, such as IEEE1588, SNTP, etc. Due to differences in synchronization principles, there are also differences in implementation methods, so there are many inconveniences in the test process of clock synchronization accuracy. [0003] In the promotion process of intelligent substations, the IEC61850 standard has been widely accepted, and most smart devices can provide GOOSE transceiver functions. GOOSE is a fast message mechanism proposed by the IEC61850 standard to solve the fast communication requirements of substations, especially the transmission of relay protection trip information...

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Application Information

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IPC IPC(8): H04L7/00H04L12/26
Inventor 陈炯聪黄曙梁晓兵魏勇李俊刚杨颖安禤文健狄军锋崔全胜史宏光
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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