CN203799000U - System for testing time tick and clock precision of power quality monitoring terminal - Google Patents
System for testing time tick and clock precision of power quality monitoring terminal Download PDFInfo
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- CN203799000U CN203799000U CN201320800529.2U CN201320800529U CN203799000U CN 203799000 U CN203799000 U CN 203799000U CN 201320800529 U CN201320800529 U CN 201320800529U CN 203799000 U CN203799000 U CN 203799000U
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Abstract
The utility model relates to a system for testing a time tick and clock precision of a power quality monitoring terminal, and the system comprises a power quality standard source, a signal collection device, an event occurrence time recorder, an IRIG-B code converter, a testing work station, and tested equipment. The power quality standard source, the signal collection device, the event occurrence time recorder, the IRIG-B code converter, the testing work station and the tested equipment are sequentially connected to from a closed loop. The system communicates with a GPS antenna, and the synchronization of all equipment in the system is achieved through an IRIG-B time-tick signal supplied by GPS antenna time tick equipment. The system provided by the utility model reduces the interference caused by human factors to a testing process, improves the testing efficiency and accuracy. The time tick and the clock precision of the tested equipment is achieved in an indirect manner with no need of changing the tested equipment, thereby meeting the requirements of detection, and needing no additional detection channels for the tested equipment. According to the different demands of testing, the system can execute various types of detection projects related to the equipment time tick and an equipment clock.
Description
Technical field
The utility model belongs to automatization testing technique, specifically relate to a kind of electric energy quality monitoring terminal to time and clock accuracy test macro.
Background technology
Along with the raising of Automation of Electric Systems degree, the automation equipments such as protection, communication, telemechanical, monitoring, supervision all need unified, accurate clock, so that the unification of data message is, the unification of the unification of event time, accident investigation." power quality monitoring device " is the secondary device for the monitoring of electrical network power quality index.IEC 61000 series standards and China's national standard require to be no more than to the absolute precision of power quality monitoring device real-time clock ± and 20 milliseconds, in the time cannot adopting external signal synchronous, real-time clock error should be better than ± and 1 second, therefore in the production of " power quality monitoring device " and put into operation in process, require to its to time and clock accuracy detect.
Most " power quality monitoring devices " do not provide to time the external interface that detects with internal clocking, so cannot direct-detection its to time and internal clocking precision, and for less time error, people cannot judge at all.
Utility model content
For the deficiencies in the prior art, the utility model provide a kind of electric energy quality monitoring terminal to time and clock accuracy test macro, by the utility model can complete power quality monitoring device to clock accuracy with to time automatic detection, improve testing efficiency, reduced the impact of human factor on test process.The utility model utilize GPS to time equipment to system provide IRIG-B to time signal to reach the synchronous of all devices in system.Synchronous based on all devices, tested power quality monitoring device has quality of power supply event recording function, can record the generation of quality of power supply event constantly, signal pickup assembly can gather, calculate the etalon time of the generation of quality of power supply event, native system occurs constantly and the error of etalon time by the quality of power supply of measuring, more tested terminal records, the tested equipment of indirectly testing to time and internal clocking precision.
The utility model comprises a set of automatic measuring circuit and a set of checking loop reliability to guarantee to detect.Automatically measuring circuit is carried out measuring ability, and the measurement result in checking loop can be verified accuracy and the reliability of detection.
The purpose of this utility model is to adopt following technical proposals to realize:
Electric energy quality monitoring terminal to time and a clock accuracy test macro, its improvements are, described system comprises that registering instrument, IRIG-B code converter, testing workstation and tested equipment constantly occur for quality of power supply standard source, signal pickup assembly, event;
There is registering instrument, IRIG-B code converter, testing workstation and tested equipment constantly and be in turn connected to form closed-loop path in described quality of power supply standard source, signal pickup assembly, event.
Described system is communicated by letter with gps antenna, by gps antenna to time equipment provide IRIG-B to time signal carry out the synchronous of all devices in system.
Preferably, described gps antenna is communicated by letter with gps satellite, for gps antenna, receive that gps satellite sends to time signal and offer relevant device to time.
Preferably, described signal pickup assembly, quality of power supply event criteria source, testing workstation and tested equipment connection form and detect loop.
Preferably, described testing workstation is connected and reads by Ethernet the data that tested equipment is uploaded with quality of power supply event criteria source with signal pickup assembly by procotol, gpib bus control.
Preferably, there is registering instrument, IRIG-B code converter, testing workstation and tested equipment connection formation checking loop constantly in described event.
Preferably, described quality of power supply event criteria source, event generation moment registering instrument and testing workstation are connected to form checking loop.
Preferably, described testing workstation is communicated by letter with signal pickup assembly by NI communications protocol, for the collection of control signal harvester, uploading data.
Preferably, described testing workstation, with event, registering instrument constantly occurs communicates by letter, and for receiving described event, occurs the absolute generation moment that moment registering instrument records TTL pulse.
Preferably, the testing result of described tested equipment is transferred to testing workstation by general communication mode, for follow-up error, calculates and uses.
Preferably, described IRIG-B signal comprises multiple types and voltage form.
Compared with the prior art, the beneficial effects of the utility model are:
(1) the automatic detection of the utility model has reduced the interference of human factor to test process to the full extent, has improved efficiency and the accuracy of test.
(2) the utility model utilization " electric energy quality monitoring terminal " existing capability, by indirect mode measure tested equipment to time and clock accuracy, need not change tested equipment, both met testing requirement, increase sense channel need not to again tested equipment.
(3) the utility model is to propose the configuration of a kind of Auto-Test System, and this Auto-Test System configuration is not limited to above-mentioned example detection project, according to different testing requirements can carry out multiple and equipment to time the test item relevant with equipment clock.
(4) system that the utility model proposes has checking loop, and the accuracy of validation test has voluntarily improved the reliability detecting greatly.
(5) the utility model signal pickup assembly is programming device, can be for secondary development, and with other function of requirements extend, ductility of the present utility model and expand space very large.
Accompanying drawing explanation
A kind of electric energy quality monitoring terminal that Fig. 1 provides for the utility model to time and clock accuracy test macro schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
A kind of electric energy quality monitoring terminal of the utility model to time and clock accuracy test macro by quality of power supply standard source, signal pickup assembly, event, there is registering instrument, IRIG-B code converter, testing workstation and tested equipment constantly and form.
The utility model comprises a set of automatic measuring circuit and a set of checking loop reliability to guarantee to detect.Automatically measuring circuit is carried out measuring ability, and the measurement result in checking loop can be verified accuracy and the reliability of detection.Signal pickup assembly, quality of power supply event criteria source, testing workstation and tested equipment form detection loop, testing workstation is by procotol, gpib bus control signal harvester and quality of power supply event criteria source, by Ethernet, read the data that tested equipment is uploaded, automatically testing process, by the programmed control of developing in testing workstation, detects thereby realize automatically.There is registering instrument, IRIG-B code converter, testing workstation and tested equipment constantly and form checking loop in event.Checking loop equipment is simple function specialized equipment, precision is higher, and system wiring is simple, interface is less, and the reliability of the result is higher.
As shown in Figure 1:
Can there is quality of power supply event waveform in quality of power supply event criteria source.In event, occur simultaneously, this equipment can produce TTL pulse (rising edge or negative edge all can).Quality of power supply event criteria source receives by gpib bus the corresponding quality of power supply event of SCPI order generation that testing workstation provides.
Wherein, gps antenna can receive that gps satellite sends to time signal and offer relevant device for to time.
Wherein, event occur constantly registering instrument need to receive gps antenna signal and with gps time to time.The generation that registering instrument can record the TTL pulse that quality of power supply event criteria source produces is (gps time) constantly, record result and by conventional communication modes, be uploaded to testing workstation and use for subsequent calculations, this records result and is used for checking and detects the accuracy of loop testing result.This registering instrument also need according to gps time produce IRIG-B to time signal, this IRIG-B signal offer tested equipment to time.
Wherein, tested equipment at least needs to have reception IRIG-B signal time adjustment function.If tested equipment has GPS time adjustment function, in this system IRIG-B to time signal section can remove.The testing result of tested equipment is transferred in testing workstation PC and is used so that follow-up error is calculated by general communication mode.
Wherein, because IRIG-B signal has multiple types and voltage form, the IRIG-B standard that tested equipment can be identified may be different from the event generation IRIG-B standard that registering instrument produces constantly, as: IRIG-B AC and IRIG-B DC signal can not be identified mutually.In the case, system needs IRIG-B code converter (or adapter).Can there is event the IRIG-B signal that registering instrument occurs constantly and be converted to the IRIG-B standard that tested equipment can be identified in converter.
Wherein, signal pickup assembly is used for providing standard value.This device need to gps signal to time.The quality of power supply event waveform that signal pickup assembly need to send quality of power supply event criteria source and TTL signal carry out digitized sampling also to sampled value mark markers (gps time).This device is received testing workstation steering order, is uploaded sampled value by procotol.
For controlling the automatic testing process of the quality of power supply and calculating signal pickup assembly, tested equipment and event, there are the data that registering instrument is uploaded constantly in testing workstation, thus the testing result of providing.
Embodiment
By signal pickup assembly, quality of power supply standard source, event, there is registering instrument, IRIG-B code converter, testing workstation, tested power quality monitoring device constantly and form in the utility model.
What wherein, signal pickup assembly adopted is the combinations of NI PXIe series of products.All to time equipment to time precision at least exceed 2 grades of error criterion detection time.
Testing workstation is controlled quality of power supply event criteria source by gpib bus quality of power supply event is occurred, by the collection of NI communications protocol control signal harvester, uploading data.Tested equipment reading is uploaded to testing workstation according to each manufacturer's definition.
A kind of electric energy quality monitoring terminal of the utility model to time and clock accuracy test macro, concrete implementing procedure is:
(1) in system, each equipment is all normally worked;
(2) guarantee in system each need to time equipment all synchronize with gps time;
(3) quality of power supply event criteria source receives testing workstation instruction, the voltage dip of any duration occurs or rise temporarily or interrupt, and in event, the pulse of TTL negative edge occurring constantly to produce;
(4) signal pickup assembly band markers sampling quality of power supply event waveform and TTL pulse;
(5) tested equipment records affair character value and event occur constantly, and this occurs constantly for detecteding value;
(6) target TTL impulse sampling value when testing workstation receives the band that signal pickup assembly uploads, calculates the quality of power supply event that standard source provides and occurs constantly, and this is standard value constantly;
(7) event generation moment registering instrument records the absolute generation moment of TTL pulse and is uploaded to testing workstation;
(8) there is the value of registering instrument constantly in the standard value of testing workstation contrast signal harvester and event, calculates the uncertainty of standard value;
(9) testing workstation receives the measured value of standard value and tested equipment, according to detection method, requires to calculate tested equipment index, provides testing result;
(10) control tested equipment lose IRIG-B to time synchronizing signal, thereby lose and the synchronizeing of GPS;
(11) continue to make tested equipment to disconnect synchronously at least 24 hours;
(12) losing synchronous in the situation that, repeating in embodiment one step (3) to (6);
(13) in twice measurement of contrast, detected equipment provides measured value and standard value error, calculate the accuracy of tested device interior clock.
In this scheme, (7) to (8) step is verification step, if user, without asking, can not carry out.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although the utility model is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement embodiment of the present utility model, and do not depart from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (10)
- Electric energy quality monitoring terminal to time and a clock accuracy test macro, it is characterized in that, described system comprises that registering instrument, IRIG-B code converter, testing workstation and tested equipment constantly occur for quality of power supply standard source, signal pickup assembly, event;There is registering instrument, IRIG-B code converter, testing workstation and tested equipment constantly and be in turn connected to form closed-loop path in described quality of power supply standard source, signal pickup assembly, event;Described system is communicated by letter with gps antenna, by gps antenna to time equipment provide IRIG-B to time signal carry out the synchronous of all devices in system.
- A kind of electric energy quality monitoring terminal as claimed in claim 1 to time and clock accuracy test macro, it is characterized in that, described gps antenna is communicated by letter with gps satellite, for gps antenna, receive that gps satellite sends to time signal and offer relevant device to time.
- A kind of electric energy quality monitoring terminal as claimed in claim 1 to time and clock accuracy test macro, it is characterized in that, described signal pickup assembly, quality of power supply event criteria source, testing workstation and tested equipment connection form and detect loop.
- A kind of electric energy quality monitoring terminal as claimed in claim 1 to time and clock accuracy test macro, it is characterized in that, described testing workstation is connected and reads by Ethernet the data that tested equipment is uploaded with quality of power supply event criteria source with signal pickup assembly by procotol, gpib bus control.
- A kind of electric energy quality monitoring terminal as claimed in claim 1 to time and clock accuracy test macro, it is characterized in that, there is registering instrument, IRIG-B code converter, testing workstation and tested equipment connection constantly and form checking loop in described event.
- A kind of electric energy quality monitoring terminal as claimed in claim 1 to time and clock accuracy test macro, it is characterized in that, there is registering instrument and testing workstation constantly and be connected to form checking loop in described quality of power supply event criteria source, event.
- A kind of electric energy quality monitoring terminal as claimed in claim 1 to time and clock accuracy test macro, its feature is levied and is, described testing workstation is communicated by letter with signal pickup assembly by NI communications protocol, for control signal harvester gather, uploading data.
- A kind of electric energy quality monitoring terminal as claimed in claim 1 to time and clock accuracy test macro, its feature is levied and is, described testing workstation, with event, registering instrument constantly occurs communicates by letter, and for receiving described event, occurs the absolute generation moment that moment registering instrument records TTL pulse.
- A kind of electric energy quality monitoring terminal as claimed in claim 1 to time and clock accuracy test macro, it is characterized in that, the testing result of described tested equipment is transferred to testing workstation by general communication mode, for follow-up error, calculates and uses.
- A kind of electric energy quality monitoring terminal as claimed in claim 1 to time and clock accuracy test macro, it is characterized in that, described IRIG-B signal comprises multiple types and voltage form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800529.2U CN203799000U (en) | 2013-12-06 | 2013-12-06 | System for testing time tick and clock precision of power quality monitoring terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800529.2U CN203799000U (en) | 2013-12-06 | 2013-12-06 | System for testing time tick and clock precision of power quality monitoring terminal |
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| CN203799000U true CN203799000U (en) | 2014-08-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616653A (en) * | 2013-12-06 | 2014-03-05 | 国家电网公司 | System and method for testing clock synchronization and clock precision of power quality monitor terminal |
| CN105738849A (en) * | 2014-12-09 | 2016-07-06 | 北京煜邦电力技术有限公司 | Digital power quality detection system |
| CN108519532A (en) * | 2018-05-15 | 2018-09-11 | 南京丹迪克科技开发有限公司 | A kind of electric energy quality test system and its test point detecting method |
| CN110174568A (en) * | 2019-05-15 | 2019-08-27 | 广西电网有限责任公司电力科学研究院 | A kind of multiple services calibration system of equipment for monitoring power quality and its calibration method |
-
2013
- 2013-12-06 CN CN201320800529.2U patent/CN203799000U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616653A (en) * | 2013-12-06 | 2014-03-05 | 国家电网公司 | System and method for testing clock synchronization and clock precision of power quality monitor terminal |
| CN103616653B (en) * | 2013-12-06 | 2016-08-17 | 国家电网公司 | System and method are tested with clock accuracy during a kind of electric energy quality monitoring terminal pair |
| CN105738849A (en) * | 2014-12-09 | 2016-07-06 | 北京煜邦电力技术有限公司 | Digital power quality detection system |
| CN108519532A (en) * | 2018-05-15 | 2018-09-11 | 南京丹迪克科技开发有限公司 | A kind of electric energy quality test system and its test point detecting method |
| CN110174568A (en) * | 2019-05-15 | 2019-08-27 | 广西电网有限责任公司电力科学研究院 | A kind of multiple services calibration system of equipment for monitoring power quality and its calibration method |
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