CN102315928A - 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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- CN102315928A CN102315928A CN201110251605A CN201110251605A CN102315928A CN 102315928 A CN102315928 A CN 102315928A CN 201110251605 A CN201110251605 A CN 201110251605A CN 201110251605 A CN201110251605 A CN 201110251605A CN 102315928 A CN102315928 A CN 102315928A
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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 based on the machine-processed IED networking clock synchronization accuracy of GOOSE.
Background technology
Current intelligent transformer substation system and smart machine exist multiple clock synchronization mode, for example IEEE1588, SNTP etc.Because 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, and the big multipotency of smart machine provides GOOSE transmission-receiving function.GOOSE is that the IEC61850 standard is solution transformer station high-speed traffic demand, especially relaying protection tripping operation message transmission, and a kind of rapid message mechanism that proposes.The GOOSE message maps directly to link layer and physical layer behind presentation layer, can adopt the switched ethernet technology with priority and VLAN sign, has guaranteed the real-time of message transmissions.This point provides technological prerequisite for the accurate test that realizes clock synchronization.
The present invention adopts a kind of method of testing based on the machine-processed IED networking clock synchronization accuracy of GOOSE; Change the problems of measurement of present IED clock synchronization accuracy to a considerable extent; Adopt GOOSE mechanism, utilize existing clock test device, under help by the GOOSE signal source; Utilize the transmission compensation mechanism, promptly can realize accuracy test the IED synchronised clock.
Summary of the invention
The purpose of this invention is to provide a kind of method of testing, to solve problem because of the different method of testing differences that cause of IED synchronization principles based on the machine-processed IED networking clock synchronization accuracy of GOOSE.
For realizing above-mentioned purpose, the method for testing step based on the machine-processed IED networking clock synchronization accuracy of GOOSE of the present invention is following:
The short distance optical fiber of (1) drawing two isometric same sexes from the GOOSE source links to each other with tested IED with the clock test appearance respectively, and the clock test appearance is as master clock, and tested IED is as from clock, and makes tested IED and clock test appearance clock synchronization;
(2) the GOOSE message that has transmitting time label T1 is sent simultaneously to clock test appearance and tested IED in the GOOSE source;
(3) tested IED and clock test appearance receive the GOOSE message, and obtain tested IED time of reception label T2 and clock test appearance time of reception label T3 respectively;
(4) tested IED will have GOOSE message up sending to the clock test appearance of transmitting time label T1 and tested IED time of reception label T2, and the difference of then tested IED time of reception label T2 and clock test appearance time of reception label T3 is tested IED clock synchronization error amount.
Further, said GOOSE message transmissions directly realizes through being mapped to link layer, adopts software mode to obtain this moment the device systems markers fast and records in the GOOSE message.
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 equal basically, and the two subtracts each other and can balance out transmission delay, and this kind mode is called compensation way
Method of testing based on the machine-processed IED networking clock synchronization accuracy of GOOSE of the present invention to the clock accuracy and the no requirement (NR) in GOOSE source, only need trigger the GOOSE message simultaneously, 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 function is independent in this method, can realize the clock synchronization accuracy test of the multiple methods of synchronization such as SNTP according to demand.And when accuracy test; Can not cause negative effect to IED clock synchronization process; Accurately realize the accuracy test of IED clock synchronization by GOOSE mechanism, can directly apply to the IEC61850 standard is to go in the test of the intelligent substation clock synchronization accuracy set up of basis.
Description of drawings
Fig. 1 is a test macro sketch map among the embodiment;
Fig. 2 is the test philosophy figure of clock synchronization accuracy among the embodiment.
Embodiment
Be elaborated below in conjunction with the method for testing based on the machine-processed IED networking clock synchronization accuracy of GOOSE of accompanying drawing to present patent application.
Fig. 1 is the test macro sketch map, and this test macro is made up of clock test appearance, GOOSE source, tested IED, and clock test appearance clock is accurate, can be used as the standard time clock of test.The GOOSE source can be sent identical 2 road GOOSE messages at synchronization, and be recorded in delivery time in the GOOSE message as an autonomous device.As shown in Figure 1; Draw the short distance optical fiber of two isometric same sexes from the GOOSE source, the short distance optical fiber of these two isometric same sexes links to each other with tested IED with the clock test appearance respectively, and clock test appearance and tested IED realize clock synchronization; The clock test appearance is as the master clock of system at this moment; Equipment under test as test macro from clock, through after the suitable time, think that this moment, equipment under test was realized with master clock synchronous.
Subsequently; The GOOSE message that has transmitting time label T1 is sent simultaneously to clock test appearance and equipment under test in the GOOSE source; After tested IED and clock test appearance receive the GOOSE message, and obtain tested IED time of reception label T2 and clock test appearance time of reception label T3 respectively.Tested subsequently IED will have message up sending to the clock test appearance of time tag T1 and T2.
In this method of testing, the time test appearance is as the master clock of system, and the acquiescence clocking error is zero.
It is following to draw the formula of synchronised clock accuracy test from Fig. 2 like this:
ΔT1=T3-T1=?ΔT
a1+ΔT
b1
Wherein Δ T1 receives message time and GOOSE source transmission message time difference, Δ T a1 tester path transmission delay for the clock test appearance; Δ T
B1The time-delay of tester acquisition time label;
ΔT2=T2-T1=?ΔT
a2+ΔT
?b2+ΔT
c
Wherein Δ T2 receives message time and GOOSE source transmission message time difference, Δ T for IED equipment
A2Tested IED path transmission delay; Δ T
B2The time-delay of tested IED acquisition time label, Δ T
cBe tested IED clocking error.
In this method, adopt the consistent optical fiber of parameter between GOOSE source to time test appearance and the tested IED, so Δ T
A1=Δ T
A2
Clock test appearance and tested IED obtain and receive GOOSE message time tag, adopt same mechanism to realize, so Δ T
B1=Δ T
B2
So just, can get tested IED clock synchronization error is:
ΔT
c?=ΔT2-ΔT1=T2-T3。
Adopt this synchronised clock accuracy test mode,, only need trigger the GOOSE message simultaneously, and stamp the transmission markers the clock accuracy and the no requirement (NR) in GOOSE source.In transport process; Take the short distance optical fiber of the isometric same sex; The transmission delay of identical GOOSE message in both is equal basically, and the two subtracts each other and can balance out transmission delay, and this kind mode can be described as compensation way; Can offset the transmission delay of the two, farthest weaken the influence of transmission delay the clock accuracy test.Can realize the test of present intelligent IED like this based on the networked clock synchronization accuracy of Goose mechanism.All GOOSE messages realize that all the Fast Time label obtains in this method, and the GOOSE message transmissions directly realizes through being mapped to link layer, can adopt software mode to obtain this moment the device systems markers fast and record in the GOOSE message.
Above-described specific embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely specific embodiment of the present invention; Be not limited to the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. method of testing based on the IED networking clock synchronization accuracy of GOOSE mechanism is characterized in that the step of this method is following:
The short distance optical fiber of (1) drawing two isometric same sexes from the GOOSE source links to each other with tested IED with the clock test appearance respectively, and the clock test appearance is as master clock, and tested IED is as from clock, and makes tested IED and clock test appearance clock synchronization;
(2) the GOOSE message that has transmitting time label T1 is sent simultaneously to clock test appearance and tested IED in the GOOSE source;
(3) tested IED and clock test appearance receive the GOOSE message, and obtain tested IED time of reception label T2 and clock test appearance time of reception label T3 respectively;
(4) tested IED will have GOOSE message up sending to the clock test appearance of transmitting time label T1 and tested IED time of reception label T2, and the difference of then tested IED time of reception label T2 and clock test appearance time of reception label T3 is tested IED clock synchronization error amount.
2. the method for testing based on the machine-processed IED networking clock synchronization accuracy of GOOSE according to claim 1; It is characterized in that: said GOOSE message transmissions directly realizes through being mapped to link layer, adopts software mode to obtain this moment the device systems markers fast and records in the GOOSE message.
3. the method for testing based on the machine-processed IED networking clock synchronization accuracy of GOOSE 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 equal basically; The two subtracts each other and can balance out transmission delay, and this kind mode is called compensation way.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761445A (en) * | 2012-07-26 | 2012-10-31 | 广东省电力调度中心 | Processing method after obtaining network transmission delay of transformer substation |
| 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 |
| CN105490797A (en) * | 2014-09-17 | 2016-04-13 | 珠海优特电力科技股份有限公司 | GOOSE mechanism-based signal synchronizing system and method |
| CN106028438A (en) * | 2016-05-18 | 2016-10-12 | 北京永安信通科技有限公司 | Method, device and system for base station time synchronization algorithm |
| CN106094495A (en) * | 2016-06-15 | 2016-11-09 | 国网江苏省电力公司电力科学研究院 | Intelligent electronic equipment of transformer substation timing tracking accuracy and the method for testing of punctual precision |
| CN110673589A (en) * | 2019-10-21 | 2020-01-10 | 浙江中控技术股份有限公司 | Clock synchronization test method and device |
| CN110958071A (en) * | 2019-10-30 | 2020-04-03 | 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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| 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 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761445A (en) * | 2012-07-26 | 2012-10-31 | 广东省电力调度中心 | Processing method after obtaining network transmission delay of transformer substation |
| 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 |
| CN105490797A (en) * | 2014-09-17 | 2016-04-13 | 珠海优特电力科技股份有限公司 | GOOSE mechanism-based signal synchronizing system and method |
| 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 |
| CN106028438A (en) * | 2016-05-18 | 2016-10-12 | 北京永安信通科技有限公司 | Method, device and system for base station time synchronization algorithm |
| CN106094495A (en) * | 2016-06-15 | 2016-11-09 | 国网江苏省电力公司电力科学研究院 | Intelligent electronic equipment of transformer substation timing tracking accuracy and the method for testing of punctual precision |
| 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 |
| CN110673589A (en) * | 2019-10-21 | 2020-01-10 | 浙江中控技术股份有限公司 | Clock synchronization test method and device |
| CN110958071A (en) * | 2019-10-30 | 2020-04-03 | 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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