CN102315928B - Test method of IED network clock synchronization precision based on GOOSE mechanism - Google Patents
Test method of IED network clock synchronization precision based on GOOSE mechanism Download PDFInfo
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- CN102315928B CN102315928B CN2011102516054A CN201110251605A CN102315928B CN 102315928 B CN102315928 B CN 102315928B CN 2011102516054 A CN2011102516054 A CN 2011102516054A CN 201110251605 A CN201110251605 A CN 201110251605A CN 102315928 B CN102315928 B CN 102315928B
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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
The invention belongs to the relaying protection technical field of automation of power engineering, be specifically related to a kind of method of testing of the networking of the IED based on GOOSE mechanism clock synchronization accuracy.
Background technology
There are the multiple clock method of synchronization in current Intelligent transformer station system and smart machine, such as IEEE1588, SNTP etc.Due to the difference of synchronization principles, implementation also there are differences, and therefore in the test process of clock synchronization accuracy, has many inconvenience.
And in the progradation of Intelligent transformer station, the IEC61850 standard has been widely accepted, the large multipotency of smart machine provides the GOOSE transmission-receiving function.GOOSE is that the IEC61850 standard is solution transformer station high-speed traffic demand, especially relaying protection tripping operation communication, and a kind of rapid message mechanism proposed.The GOOSE message maps directly to link layer and physical layer after presentation layer, can adopt the switched ethernet technology with priority and VLAN sign, has guaranteed the real-time of message transmissions.This point provides the technology prerequisite for the accurate test that realizes clock synchronous.
The present invention adopts a kind of method of testing of the networking of the IED based on GOOSE mechanism clock synchronization accuracy, change to a considerable extent the measurement problem of current IED clock synchronization accuracy, adopt GOOSE mechanism, utilize existing clock test device, under the help by the GOOSE signal source, utilize the transmission compensation mechanism, namely can realize the accuracy test to the IED synchronised clock.
Summary of the invention
The method of testing that the purpose of this invention is to provide a kind of networking of IED based on GOOSE mechanism clock synchronization accuracy, to solve the problem because of the different method of testing differences that cause of IED synchronization principles.
For achieving the above object, the method for testing step of the networking of the IED based on GOOSE mechanism clock synchronization accuracy of the present invention is as follows:
The short distance optical fiber of (1) drawing two isometric same sexes from the GOOSE source is connected with tested IED with the clock test instrument respectively, and the clock test instrument is as master clock, and tested IED is as from clock, and makes tested IED and clock test instrument clock synchronous;
(2) the GOOSE source sends the GOOSE message with transmitting time label T1 simultaneously to clock test instrument and tested IED;
(3) tested IED and clock test instrument receive the GOOSE message, and obtain respectively tested IED time of reception label T2 and clock test instrument time of reception label T3;
(4) tested IED will be with the GOOSE message up sending of transmitting time label T1 and tested IED time of reception label T2 to the clock test instrument, and the difference of tested IED time of reception label T2 and clock test instrument time of reception label T3 is tested IED clock synchronous error amount.
Further, described GOOSE message transmissions directly realizes by being mapped to link layer, adopts software mode quick obtaining device systems markers and being recorded in the GOOSE message this moment.
Further, adopting telecommunication optical fiber is the isometric Hermaphroditic fibre optical of short distance, and the transmission delay of identical GOOSE message in both is substantially equal, and the two subtracts each other and can balance out transmission delay, and this kind mode is called compensation way
The method of testing of the networking of the IED based on GOOSE mechanism clock synchronization accuracy of the present invention, to clock accuracy the no requirement (NR) in GOOSE source, only need trigger simultaneously the GOOSE message, and stamp the transmission markers.In transport process, take the short distance optical fiber of the isometric same sex, reach the compensation mechanism of transmission delay, the transmission delay of offsetting the two.When GOOSE receives, utilize hardware acquisition time label, offset the time error that label obtains.Each functional independence in this method, can according to demand, realize the clock synchronization accuracy test of the multiple synchronization modes such as SNTP.And when accuracy test, can not cause negative effect to IED clock synchronous process, by GOOSE mechanism, accurately realize the accuracy test of IED clock synchronous, can directly apply to take in the test of the intelligent substation clock synchronization accuracy that the IEC61850 standard gets up as Foundation and go.
The accompanying drawing explanation
Fig. 1 is test macro schematic diagram in embodiment;
Fig. 2 is the test philosophy figure of clock synchronization accuracy in embodiment.
Embodiment
Below in conjunction with the method for testing of accompanying drawing to the networking of the IED based on the GOOSE mechanism clock synchronization accuracy of present patent application, be elaborated.
Fig. 1 is the test macro schematic diagram, and this test macro is comprised of clock test instrument, GOOSE source, tested IED, and clock test instrument cycle accurate can be used as the standard time clock of test.The GOOSE source, as an autonomous device, can send identical 2 road GOOSE messages at synchronization, and delivery time is recorded in the GOOSE message.As shown in Figure 1, from the GOOSE source, draw the short distance optical fiber of two isometric same sexes, the short distance optical fiber of these two isometric same sexes is connected with tested IED with the clock test instrument respectively, clock test instrument and tested IED realize clock synchronous, now the clock test instrument is as the master clock of system, equipment under test as test macro from clock, after the time through suitable, think that now equipment under test has been realized synchronizeing with master clock.
Subsequently, the GOOSE source sends the GOOSE message with transmitting time label T1 simultaneously to clock test instrument and equipment under test, after tested IED and clock test instrument receive the GOOSE message, and obtain respectively tested IED time of reception label T2 and clock test instrument time of reception label T3.Tested IED will be with the message up sending of time tag T1 and T2 to the clock test instrument subsequently.
In this method of testing, time tester is as the master clock of system, and the acquiescence clocking error is zero.
Can show that the formula of synchronised clock accuracy test is as follows from Fig. 2 like this:
ΔT1=T3-T1=?ΔT
a1+ΔT
b1
Wherein Δ T1 is that the clock test instrument receives the message time and the GOOSE source sends message time difference, the time delay of Δ T a1 tester path transmission; Δ T
B1The time delay of tester acquisition time label;
ΔT2=T2-T1=?ΔT
a2+ΔT
?b2+ΔT
c
Wherein Δ T2 is that IED equipment receives the message time and the GOOSE source sends message time difference, Δ T
A2The time delay of tested IED path transmission; Δ T
B2The time delay of tested IED acquisition time label, Δ T
cFor tested IED clocking error.
In this method, the GOOSE source is between time tester and tested IED, adopting the optical fiber that parameter is consistent, therefore Δ T
A1=Δ T
A2.
Clock test instrument and tested IED obtain and receive GOOSE message time tag, adopt same mechanism to realize, therefore Δ T
B1=Δ T
B2.
So just, can obtain tested IED clock synchronous error is:
ΔT
c?=ΔT2-ΔT1=T2-T3。
Adopt this synchronised clock accuracy test mode, to clock accuracy the no requirement (NR) in GOOSE source, only need trigger simultaneously the GOOSE message, and stamp the transmission markers.In transport process, take the short distance optical fiber of the isometric same sex, the transmission delay of identical GOOSE message in both is substantially equal, the two subtracts each other and can balance out transmission delay, this kind mode can be described as compensation way, can offset the transmission delay of the two, farthest weaken the impact of transmission delay on the clock accuracy test.Can realize like this test of current intelligent IED based on the networking clock synchronization accuracy of Goose mechanism.In this method, all GOOSE messages realize that all quick time tag obtains, and the GOOSE message transmissions directly realizes by being mapped to link layer, can adopt software mode quick obtaining device systems markers and being recorded in the GOOSE message this moment.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. the method for testing of the networking of the IED based on a GOOSE mechanism clock synchronization accuracy, is characterized in that, the step of the method is as follows:
The short distance optical fiber of (1) drawing two isometric same sexes from the GOOSE source is connected with tested IED with the clock test instrument respectively, and the clock test instrument is as master clock, and tested IED is as from clock, and makes tested IED and clock test instrument clock synchronous;
(2) the GOOSE source sends the GOOSE message with transmitting time label T1 simultaneously to clock test instrument and tested IED;
(3) tested IED and clock test instrument receive the GOOSE message, and obtain respectively tested IED time of reception label T2 and clock test instrument time of reception label T3;
(4) tested IED will be with the GOOSE message up sending of transmitting time label T1 and tested IED time of reception label T2 to the clock test instrument, and the difference of tested IED time of reception label T2 and clock test instrument time of reception label T3 is tested IED clock synchronous error amount.
2. the method for testing of the networking of the IED based on GOOSE mechanism clock synchronization accuracy according to claim 1, it is characterized in that: described GOOSE message transmissions directly realizes by being mapped to link layer, adopts software mode quick obtaining device systems markers and being recorded in the GOOSE message this moment.
3. the method for testing of the networking of the IED based on GOOSE mechanism clock synchronization accuracy according to claim 1 and 2, it is characterized in that: adopting telecommunication optical fiber is the isometric Hermaphroditic fibre optical of short distance, the transmission delay of identical GOOSE message in both is substantially equal, the transmission delay of identical GOOSE message in two isometric Hermaphroditic fibre opticals subtracts each other and can balance out transmission delay, and this kind mode is called compensation way.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102761445B (en) * | 2012-07-26 | 2015-04-22 | 广东省电力调度中心 | Processing method after obtaining network transmission delay of transformer substation |
| CN105490797B (en) * | 2014-09-17 | 2019-05-21 | 珠海优特电力科技股份有限公司 | Signal synchronizing system and method based on GOOSE mechanism |
| CN105407317A (en) * | 2015-10-30 | 2016-03-16 | 国网江西省电力科学研究院 | Time synchronization system based on intelligent substation video monitoring |
| CN106028438B (en) * | 2016-05-18 | 2018-11-13 | 北京永安信通科技股份有限公司 | The methods, devices and systems of base station time synchronism algorithm |
| CN106094495B (en) * | 2016-06-15 | 2018-06-19 | 国网江苏省电力公司电力科学研究院 | The test method of intelligent electronic equipment of transformer substation timing tracking accuracy and punctual precision |
| CN110673589B (en) * | 2019-10-21 | 2021-08-17 | 浙江中控技术股份有限公司 | Clock synchronization test method and device |
| CN110958071B (en) * | 2019-10-30 | 2023-03-24 | 中国电力科学研究院有限公司 | Electronic transformer clock error self-calibration system and method based on 4G module |
| CN111948471A (en) * | 2020-06-28 | 2020-11-17 | 国网江西省电力有限公司电力科学研究院 | Method and system for detecting time setting precision performance of secondary equipment of intelligent substation |
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| CN101330374A (en) * | 2007-06-18 | 2008-12-24 | 大唐移动通信设备有限公司 | Method and system for synchronizing clock of transmission network as well as subordinate clock side entity |
| CN101741139A (en) * | 2009-12-28 | 2010-06-16 | 广东电网公司电力科学研究院 | Method and device thereof for detecting communication state of digital transformer substation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101330374A (en) * | 2007-06-18 | 2008-12-24 | 大唐移动通信设备有限公司 | Method and system for synchronizing clock of transmission network as well as subordinate clock side entity |
| CN101741139A (en) * | 2009-12-28 | 2010-06-16 | 广东电网公司电力科学研究院 | Method and device thereof for detecting communication state of digital transformer substation |
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