CN206411250U - A kind of DC electronic current transformer digitizes real-time calibration equipment - Google Patents

A kind of DC electronic current transformer digitizes real-time calibration equipment Download PDF

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Publication number
CN206411250U
CN206411250U CN201621369553.5U CN201621369553U CN206411250U CN 206411250 U CN206411250 U CN 206411250U CN 201621369553 U CN201621369553 U CN 201621369553U CN 206411250 U CN206411250 U CN 206411250U
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CN
China
Prior art keywords
current transformer
electronic current
tester
calibration equipment
standard
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201621369553.5U
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Chinese (zh)
Inventor
王斌
陈元杰
胡浩亮
熊前柱
陈绪轩
马祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan University of Science and Engineering WUSE
China Electric Power Research Institute Co Ltd CEPRI
Wuhan University of Science and Technology WHUST
Original Assignee
Wuhan University of Science and Engineering WUSE
China Electric Power Research Institute Co Ltd CEPRI
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Publication date
Application filed by Wuhan University of Science and Engineering WUSE, China Electric Power Research Institute Co Ltd CEPRI filed Critical Wuhan University of Science and Engineering WUSE
Priority to CN201621369553.5U priority Critical patent/CN206411250U/en
Application granted granted Critical
Publication of CN206411250U publication Critical patent/CN206411250U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

A kind of DC electronic current transformer digitizes real-time calibration equipment, including standard DC current transformer and tester, described standard DC current transformer is connected with shunt resistance, shunt resistance connects data collecting card, combining unit is connected with protocol converter, tested Digital DC electronic current mutual inductor respectively, clock synchronization apparatus is connected with protocol converter, data collecting card by optical fiber respectively, data collecting card is connected with tester by serial ports, and protocol conversion apparatus is connected with tester by Ethernet interface;The utility model can carry out calibration test to the degree of accuracy that DC electronic current transformer digitizes verification, its calibration equipment message transmission rate is high, long transmission distance, DC converter station mutual-inductor calibration device transmitting procedure is solved to be disturbed by site environment, wiring is numerous and diverse, high_voltage isolation problem between transformer, is worth promoting.

Description

A kind of DC electronic current transformer digitizes real-time calibration equipment
Technical field
The utility model is related to power system measuring field, and especially a kind of DC electronic current transformer digitlization is real When calibration equipment.
Background technology
With visual plant of the DC electronic current transformer as measurement HVDC transmission system, to ensure direct current Safety and the economic stability operation of power system, it is ensured that electric energy metrical, trade settlement are accurately disclosed, control and protection to system Accurately and reliably metrical information is provided, is to ensure that direct current is defeated by the DC electronic current transformer used in system progress verification The essential work of electrical system safety, reliability service.
At present, it is domestic to digitizing periodic verification/calibration test before DC electronic current transformer is installed It is relatively fewer, the field also lack correlation national standard and company standard, and at the scene carry out verification experiment when there is also Certain test operation difficulty.Relative under laboratory environment verify, the DC electronic current transformer run at the scene by Severe, the wide dynamic range in its live electromagnetic environment, it exports and ideally existed very big deviation.
Utility model content
The utility model aims to provide a kind of degree of accuracy progress calibration test that can be to DC electronic current transformer, Its calibration equipment message transmission rate is high, long transmission distance, solves DC converter station mutual-inductor calibration device transmitting procedure by existing Field environmental disturbances, wiring is numerous and diverse, and the DC electronic current transformer digitlization of the high_voltage isolation problem between transformer is real-time Calibration equipment.
To achieve the above object, the utility model provides following technical scheme:A kind of DC electronic current transformer number The real-time calibration equipment of wordization, including standard DC current transformer, tested Digital DC electronic current mutual inductor, merging list Member, protocol converter, shunt resistance, clock synchronization apparatus, data collecting card and tester, described standard direct current Current Mutual Inductance Device is connected with shunt resistance, and shunt resistance connection data collecting card, combining unit is straight with protocol converter, tested digitlization respectively Electronic current mutual inductor connection is flowed, clock synchronization apparatus is connected with protocol converter, data collecting card by optical fiber respectively, number It is connected according to capture card with tester by serial ports, protocol conversion apparatus is connected with tester by Ethernet interface.
It is used as further scheme of the present utility model:The standard DC current transformer connects DC current source.
It is used as further scheme of the present utility model:The tested Digital DC electronic current mutual inductor connection direct current Current source.
It is used as further scheme of the present utility model:The tester is provided with internal storage.
Compared with prior art, the beneficial effects of the utility model are:DC electronic current transformer digitlization is real When calibration equipment can to DC electronic current transformer digitize verification the degree of accuracy carry out calibration test, its calibration equipment Message transmission rate is high, long transmission distance, solves DC converter station mutual-inductor calibration device transmitting procedure dry by site environment Disturb, wiring is numerous and diverse, the high_voltage isolation problem between transformer.To promote the mark of DC electronic current transformer digital interface Standardization is worth promoting there is provided the foundation reliably examined and determine.
Brief description of the drawings
Fig. 1 is modular structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belongs to the scope of the utility model protection.
Referring to Fig. 1, in the utility model embodiment, a kind of DC electronic current transformer digitlization verification in real time is filled Put, including standard DC current transformer, tested Digital DC electronic current mutual inductor, combining unit, protocol converter, Shunt resistance, clock synchronization apparatus, data collecting card and tester, described standard DC current transformer connect with shunt resistance Connect, shunt resistance connection data collecting card, data collecting card introduce shunt resistance conversion voltage signal, combining unit respectively with Protocol converter, tested Digital DC electronic current mutual inductor connection, clock synchronization apparatus respectively with protocol converter, number Connected according to capture card by optical fiber, data collecting card is connected with tester by serial ports, protocol conversion apparatus passes through with tester Ethernet interface is connected.
It is above-mentioned, standard DC current transformer connection DC current source.
It is above-mentioned, it is detected Digital DC electronic current mutual inductor connection DC current source.
Above-mentioned, clock synchronization apparatus controls both converter and data collecting card synchronized sampling, it is ensured that the standard of field-checking True property.
Above-mentioned, combining unit, its major function is that synchronous acquisition is detected the output of Digital DC electronic current mutual inductor Signal and be sent to second protection, measuring and controlling equipment according to the form framing of standard.Combining unit is straight to being once detected digitlization Electronic current mutual inductor voltage and current signal synchronous acquisition is flowed, is then used according to a kind of IEC60044-8 based on FT3 forms Synchronization, optical signal is changed into by electric signal, and the transmission of signal is completed using optical fiber, protocol converter is sent to.Optical fiber Transmission attenuation is small, and frequency is high, and strong antijamming capability can protect the electromagnetic interference of the generations such as thunder and lightning, failure, for remote biography It is defeated to have very big advantage.
Above-mentioned, current signal is converted to voltage signal by shunt resistance, its major function.
Above-mentioned, protocol converter, its major function is that the FT3 agreements that combining unit is sent change into Transmission Control Protocol through Ethernet Produce tester;Protocol converter is sampled using FPGA to FT3 messages, and its data is handled in real time.Then agreement is passed through Protocol stack in converter in embedded system, packs the data to TCP forms, tester is transferred to by Ethernet interface.
Above-mentioned, data acquisition unit, its function is that the secondary side signal of collection standard DC current transformer is then delivered to Tester.
It is above-mentioned, tester, i.e., virtual check system, provided with internal storage, its function is divided the signal collected Filtering process is analysed, then result shows and stored.
Principle of the present utility model:Primary current is converted to secondary electricity by tested Digital DC electronic current mutual inductor Signal is flowed, combining unit is passed it to;Combining unit receives the synchronous arteries and veins that Synchronization Clock sends protocol converter simultaneously Signal is rushed, and the secondary singal of reception is converted into IEC60044-8 and is based on FT3 format frames, passes through optical fiber output;Tested numeral The protocol converter for changing DC electronic current transformer end receives the FT3 format frames that combining unit is sent, and by adopting in FT3 Sample value is parsed, and tester is transferred to through Ethernet with Transmission Control Protocol;The tested output signal collected is passed through filter by tester Ripple algorithm process is analyzed, and then its signal exported with standard DC current transformer is compared, ratio calculated error, i.e.,
γ=(KIt is to be measured-KStandard)/KStandard* 100%.KIt is to be measuredRepresenting to be measured has value, KStandardStandard value is represented, γ represents to compare difference. Result of calculation and real time information are shown to man-machine interface and preserved by terminal check instrument.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, can realize that this practicality is new in other specific forms Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation Involved claim.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It may be appreciated other embodiment.

Claims (4)

1. a kind of DC electronic current transformer digitizes real-time calibration equipment, including it is standard DC current transformer, tested Digital DC electronic current mutual inductor, combining unit, protocol converter, shunt resistance, clock synchronization apparatus, data acquisition Card and tester, it is characterised in that described standard DC current transformer is connected with shunt resistance, shunt resistance connection data Capture card, combining unit is connected with protocol converter, tested Digital DC electronic current mutual inductor respectively, and clock is synchronously filled Put and be connected respectively with protocol converter, data collecting card by optical fiber, data collecting card is connected with tester by serial ports, agreement Conversion equipment is connected with tester by Ethernet interface.
2. DC electronic current transformer according to claim 1 digitizes real-time calibration equipment, it is characterised in that institute State standard DC current transformer connection DC current source.
3. DC electronic current transformer according to claim 1 digitizes real-time calibration equipment, it is characterised in that institute State tested Digital DC electronic current mutual inductor connection DC current source.
4. DC electronic current transformer according to claim 1 digitizes real-time calibration equipment, it is characterised in that institute Tester is stated provided with internal storage.
CN201621369553.5U 2016-12-14 2016-12-14 A kind of DC electronic current transformer digitizes real-time calibration equipment Expired - Fee Related CN206411250U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621369553.5U CN206411250U (en) 2016-12-14 2016-12-14 A kind of DC electronic current transformer digitizes real-time calibration equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621369553.5U CN206411250U (en) 2016-12-14 2016-12-14 A kind of DC electronic current transformer digitizes real-time calibration equipment

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Publication Number Publication Date
CN206411250U true CN206411250U (en) 2017-08-15

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109507626A (en) * 2018-11-01 2019-03-22 苏州华电电气股份有限公司 Extra-high voltage direct-current transformer checking system
CN111044963A (en) * 2019-12-31 2020-04-21 长沙天恒测控技术有限公司 High-frequency current sensor calibration method and device adopting coaxial shunt
CN113589020A (en) * 2021-09-29 2021-11-02 湖北傲云电气有限公司 Voltage-sharing measurement device and method for power device of high-isolation voltage-withstanding series circuit
CN111044963B (en) * 2019-12-31 2021-12-21 长沙天恒测控技术有限公司 High-frequency current sensor calibration method and device adopting coaxial shunt

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109507626A (en) * 2018-11-01 2019-03-22 苏州华电电气股份有限公司 Extra-high voltage direct-current transformer checking system
CN111044963A (en) * 2019-12-31 2020-04-21 长沙天恒测控技术有限公司 High-frequency current sensor calibration method and device adopting coaxial shunt
CN111044963B (en) * 2019-12-31 2021-12-21 长沙天恒测控技术有限公司 High-frequency current sensor calibration method and device adopting coaxial shunt
CN113589020A (en) * 2021-09-29 2021-11-02 湖北傲云电气有限公司 Voltage-sharing measurement device and method for power device of high-isolation voltage-withstanding series circuit

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170815

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