CN202285032U - Electronic transformer harmonic influence testing device - Google Patents
Electronic transformer harmonic influence testing device Download PDFInfo
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- CN202285032U CN202285032U CN2011203002621U CN201120300262U CN202285032U CN 202285032 U CN202285032 U CN 202285032U CN 2011203002621 U CN2011203002621 U CN 2011203002621U CN 201120300262 U CN201120300262 U CN 201120300262U CN 202285032 U CN202285032 U CN 202285032U
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Abstract
The utility model relates to an electronic transformer harmonic influence testing device, which includes a high power fundamental wave/harmonic wave composition power source, a harmonic standard current and voltage transformer, a standard current and voltage conversion device, and an electronic transformer harmonic calibrator, wherein the high power fundamental wave/harmonic wave composition power source is composed by a fundamental wave power source unit, a harmonic wave power source unit and a fundamental wave/harmonic wave composition output unit. The harmonic standard current and voltage transformer are connected with an output end of a primary and fundamental wave/harmonic wave composition output unit of a to-be-tested electronic current and voltage transformer; an output signal of the harmonic standard current and voltage transformer is connected to the standard current and voltage conversion device; an output signal of the standard current and voltage conversion device is connected with the electronic transformer harmonic calibrator; and the signal output end of the to-be-tested electronic current and voltage transformer is connected with the electronic transformer harmonic calibrator. The utility model provides an efficient method for harmonic calibration of the electronic transformer harmonic calibrator.
Description
Technical field
The utility model relates to a kind of electronic mutual inductor harmonic effects proving installation, belongs to power equipment calibrating and detection technique field.
Background technology
The at present domestic method that the research of electronic mutual inductor harmonic characteristic is adopted is the frequency characteristic method; Promptly feed electric current (voltage) signal of different frequency respectively at the primary side of electronic mutual inductor; Measure its corresponding error, obtain the frequency characteristic of electronic mutual inductor.But the practical operation situation of this test method and electronic mutual inductor is variant.During practical operation situation, the signal that is added in the electronic mutual inductor primary side is the synthetic signal of multiple harmonic, rather than the signal of independent some frequencies.
Development electronic mutual inductor harmonic characteristic calibrating installation purpose is to study harmonic wave metering and the protection feature of electronic mutual inductor under actual condition, guarantees the electric system reliability service, accelerates to advance the unified strong intelligent grid construction of China.
Summary of the invention
The purpose of the utility model has provided a kind of electronic mutual inductor harmonic characteristic calibrating installation; As a calibration measurement system, it has set up high-power electric current voltage harmonic source, with the synthetic back output of fundamental signal harmonic signal; Actual operating mode that can analog electrical minor mutual inductor; Through the harmonic error check system, the harmonic characteristic of electronic mutual inductor actual motion is launched research then, fill up the blank in this field.
The technical scheme of the utility model is:
Said a kind of electronic mutual inductor harmonic effects proving installation comprises: high-power principal wave harmonic wave synthesizes power supply 1, harmonic standard current-voltage transformer 5, normalized current voltage conversion device 7, electronic mutual inductor harmonic wave tester 8;
The synthetic power supply 1 of high-power principal wave harmonic wave comprises first-harmonic power supply unit 2, harmonic wave power supply unit 3, the synthetic output unit 4 of principal wave harmonic wave;
When tested electronic current voltage transformer (VT) 6 is calibrated; The output signal of the first-harmonic power supply unit 2 harmonic power supply units 3 of the synthetic power supply of high-power principal wave harmonic wave 1 inside passes through current lifting device after the synthetic output unit 4 of principal wave harmonic wave synthesizes; Stepup transformer obtains big electric current, high voltage output;
The output terminal of the synthetic output unit 4 of the elementary and principal wave harmonic wave of harmonic standard current-voltage transformer 5 and tested electronic current voltage transformer (VT) 6 is connected: for current transformer is to be connected in series, like Fig. 1; For voltage transformer (VT) is to be connected in parallel, like Fig. 2; The output signal of harmonic standard current-voltage transformer 5 is connected to the signal input part of normalized current voltage conversion device 7; The output of normalized current voltage conversion device 7 is connected to a signal input part of electronic mutual inductor harmonic wave tester 8; The output of tested electronic current voltage transformer (VT) 6 is connected to another signal input part of electronic mutual inductor harmonic wave tester 8.
The synthetic power supply 1 of high-power principal wave harmonic wave confirms that through the selection of stack switch the output of the synthetic power supply 1 of high-power principal wave harmonic wave is first-harmonic or harmonic wave, or the first-harmonic harmonic is synthetic; The amplitude of first-harmonic and each harmonic is regulated by the output voltage adjusting module.
Connecting resistance mode behind the harmonic standard current transformer employing high precision double electrode current mutual inductor in the harmonic standard current-voltage transformer 5, the harmonic standard voltage transformer (VT) adopts bipolar voltage mutual inductor concatenation technology.
Adopt direct comparison principle, harmonic standard electric current (voltage) mutual inductor 5 and the output data of tested electronic current voltage transformer (VT) 6 are carried out directly comparing after the signal Processing; Ratio error draws through the effective value of fundametal compoment in comparing harmonics present normalized current voltage transformer (VT) 5 and tested electronic current voltage transformer (VT) 6 frequency domains.Phase differential carries out spectrum analysis or the acquisition of interactive power spectrumanalysis through calculating FFT.
The utility model is that the harmonic characteristic calibration of electronic mutual inductor provides a kind of effective method, and its advantage is:
1) sets up high-power electric current voltage harmonic experiment porch.Can big electric current of the first harmonic of analog electrical minor mutual inductor under actual working conditions or high voltage;
2) develop electronic mutual inductor harmonic characteristic calibration test system, comprised harmonic standard mutual inductor and electronic mutual inductor harmonic wave check system.
Description of drawings
Fig. 1 is the utility model schematic block circuit diagram (current transformer series connection).
Fig. 2 is the utility model schematic block circuit diagram (voltage transformer (VT) parallel connection).
Fig. 3 is the high-power electric current voltage harmonic of a utility model source principle.
Fig. 4 is the utility model harmonic current standard converter resistance CC figure.
Fig. 5 is the utility model electronic mutual inductor harmonic wave verification structured flowchart.
Fig. 6 is the utility model electronic mutual inductor harmonic wave checking routine process flow diagram.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model electronic mutual inductor harmonic effects proving installation is done further explanation.
The high-power principal wave harmonic wave of mark among Fig. 1,2: 1-synthesizes power supply, 2-first-harmonic power supply unit, 3-harmonic wave power supply unit, the synthetic output unit of 4-principal wave harmonic wave, 5-harmonic standard electric current (voltage) mutual inductor, the tested electronic current of 6-(voltage) mutual inductor, 7-normalized current (voltage) conversion equipment, 8-electronic mutual inductor harmonic wave tester.
Like Fig. 1, shown in 2, the utility model embodiment comprises that high-power principal wave harmonic wave synthesizes power supply 1, harmonic standard electric current (voltage) mutual inductor 5, tested electronic current (voltage) mutual inductor 6, normalized current (voltage) conversion equipment 7, electronic mutual inductor harmonic wave tester 8.The synthetic power supply 1 of high-power principal wave harmonic wave comprises the synthetic output unit 4 of first-harmonic power supply unit 2, harmonic wave power supply unit 3 and principal wave harmonic wave.
Synthetic power principle figure is as shown in Figure 3 for high-power electric current voltage harmonic, and at first crystal oscillating circuit one tunnel produces the 50HZ signal, through producing the 50Hz sinusoidal signal after the D/A module, outputs to the power amplification link.Another road produces the each harmonic signal through frequency splitting technology, through after the phase settings, outputs to the D/A module and produces the each harmonic sinusoidal signal; Harmonic wave stack switch is selected whether the harmonic wave stack is got into first-harmonic and is carried out power amplification, and the amplitude of first-harmonic and each harmonic can be regulated through the output voltage adjusting module simultaneously; The principal wave harmonic wave composite signal of power amplification link output is through output after filtering and the isolating transformer.The current/voltage testing circuit detects output current voltage, simultaneously detection signal is returned to the power amplification link, reaches the purpose of current/voltage closed-loop control; The resultant voltage signal of isolating transformer output produces big electric current (high voltage) through current lifting device (stepup transformer).
Harmonic standard mutual inductor and electronic mutual inductor harmonic wave check system.Wherein the harmonic standard current transformer has adopted connecting resistance mode behind the high precision twin-stage current transformer, and the resistance CC is as shown in Figure 4.The harmonic standard voltage transformer (VT) adopts twin-stage voltage transformer (VT) concatenation technology, and experiment proof overall precision can reach 0.01%.
Electronic mutual inductor harmonic wave tester structure is as shown in Figure 5; Standard channel data acquisition unit and tested channel data collecting unit have adopted the NI5922 high-accuracy data collection card; NI 922 is binary channels variable-resolution digitizers, has the highest in the market resolution and HDR.NI PCI-5922 can improve resolution through reducing sampling rate in the velocity range of 24 500kS/s to 16 15MS/s.Dirigibility that this is superpower and resolution come from NI Flex IIADC technology, and this technology has been used multidigit delta-sigma to strengthen converter and obtained the linearization technique of patent.PCI-5922 is used in combination with softwares such as NI LabVIEW, and its measurement performance can surmount the high end instrument of intimate with it tradition.
The digital data acquisition passage is the Ethernet card of optical fiber or RJ45 interface; The outside is furnished with high-speed light Ethernet interpreter simultaneously; Be output as optical fiber output like combiner, then will get final product for the RJ45 interface through its conversion of signals of optical Ethernet interpreter, the convenient tester that inserts uses.
In order to satisfy high-precise synchronization needs regularly, all right external GPS synchronizing signal of synchronizing pulse is followed the tracks of the GPS pulse per second (PPS), and synchronization accuracy is the submicrosecond level.In order to satisfy different synchronization triggering demand, be provided with the light input synchronously simultaneously, the electricity input is synchronous, electricity output, and have negative function.The frequency of synchronizing pulse also can be provided with as required.
Data processing and error display unit have adopted the Labview graphical programming software, and this software is the innovative product-based on the development environment of G language, cooperate numerous collecting test integrated circuit board of NI company to be referred to as " virtual instrument " of American National instrument company.So-called virtual instrument; Be exactly on universal computer platform; The user its essence is traditional instrument hardware and latest computed machine software engineering are fully combined according to requirement definition of oneself and the test function that designs an apparatus, to realize and to expand the function of traditional instrument.Compare with traditional instrument, virtual instrument all has tangible technical advantage at aspects such as intelligent degree, processing power, the ratio of performance to price, operability.The developer can be according to customer requirement customized software interface, function.
Electronic mutual inductor harmonic wave checking routine process flow diagram is as shown in Figure 6, adopts direct comparison expression principle, and the digital output data that is about to standard mutual inductor and tested mutual inductor carries out directly comparing after the signal Processing.Ratio error draws through the effective value of fundametal compoment in standard of comparison mutual inductor and the tested mutual inductor frequency domain, and phase differential carries out spectrum analysis or cross-power spectrum analysis acquisition through calculating FFT.
During practical implementation, the synthetic power supply 1 output first-harmonic harmonic resultant voltage signal of high-power principal wave harmonic wave, the parameter of first-harmonic harmonic is controlled respectively by first-harmonic power supply unit 2 harmonic power supply units 3; The synthetic power supply output of high-power principal wave harmonic wave signal forms big electric current (high voltage) test loop; In simultaneously big electric current (high voltage) test loop of harmonic standard electric current (voltage) mutual inductor 5 and tested electronic current (voltage) mutual inductor; The signal of harmonic standard electric current (voltage) mutual inductor 5 outputs inserts in the electronic mutual inductor harmonic wave tester 8 through normalized current (voltage) conversion equipment 7 backs; Tested electronic current (voltage) mutual inductor output signal directly inserts electronic mutual inductor harmonic wave tester 8; Electronic mutual inductor harmonic wave tester 8 carries out corresponding data acquisition and calculating with this two paths of signals, can draw the harmonic error characteristic of electronic mutual inductor.
The synthetic power supply 1 of high-power principal wave harmonic wave wherein can be regulated the number of times of amplitude, phase place and the harmonic wave of first-harmonic harmonic as required.First-harmonic and each harmonic can independent regulation, can comprise multiple harmonic wave simultaneously, and overtone order reaches as high as 11 times.Harmonic current and voltage under can analog electrical minor mutual inductor actual operating mode be calibrated thereby it is carried out frequency characteristic.
Claims (1)
1. electronic mutual inductor harmonic effects proving installation, it is characterized in that: said electronic mutual inductor harmonic effects proving installation comprises: high-power principal wave harmonic wave synthesizes power supply (1), harmonic standard current-voltage transformer (5), normalized current voltage conversion device (7), electronic mutual inductor harmonic wave tester (8);
High-power principal wave harmonic wave synthesizes power supply (1) and is made up of first-harmonic power supply unit (2), harmonic wave power supply unit (3), the synthetic output unit (4) of principal wave harmonic wave;
The output terminal of the synthetic output unit (4) of the elementary and principal wave harmonic wave of harmonic standard current-voltage transformer (5) and tested electronic current voltage transformer (VT) (6) is connected: for current transformer is to be connected in series, and is to be connected in parallel for voltage transformer (VT); The output signal of harmonic standard current-voltage transformer (5) is connected to the signal input part of normalized current voltage conversion device (7); The output of normalized current voltage conversion device (7) is connected to a signal input part of electronic mutual inductor harmonic wave tester (8); The output of tested electronic current voltage transformer (VT) (6) is connected to another signal input part of electronic mutual inductor harmonic wave tester (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203002621U CN202285032U (en) | 2011-08-18 | 2011-08-18 | Electronic transformer harmonic influence testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203002621U CN202285032U (en) | 2011-08-18 | 2011-08-18 | Electronic transformer harmonic influence testing device |
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| CN202285032U true CN202285032U (en) | 2012-06-27 |
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| CN2011203002621U Expired - Fee Related CN202285032U (en) | 2011-08-18 | 2011-08-18 | Electronic transformer harmonic influence testing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499800A (en) * | 2013-09-09 | 2014-01-08 | 国家电网公司 | Frequency characteristic detecting system of electronic type voltage transformer |
| CN106772199A (en) * | 2017-01-05 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | A kind of DC current transformer frequency response characteristic check system and method |
| CN115421092A (en) * | 2022-07-22 | 2022-12-02 | 中广核新能源安徽有限公司 | Calibration device and calibration method for electronic transformer harmonic calibrator |
-
2011
- 2011-08-18 CN CN2011203002621U patent/CN202285032U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499800A (en) * | 2013-09-09 | 2014-01-08 | 国家电网公司 | Frequency characteristic detecting system of electronic type voltage transformer |
| CN106772199A (en) * | 2017-01-05 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | A kind of DC current transformer frequency response characteristic check system and method |
| CN115421092A (en) * | 2022-07-22 | 2022-12-02 | 中广核新能源安徽有限公司 | Calibration device and calibration method for electronic transformer harmonic calibrator |
| CN115421092B (en) * | 2022-07-22 | 2023-12-19 | 中广核新能源安徽有限公司 | Electronic transformer harmonic calibrator calibration device and calibration method |
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| C14 | Grant of patent or utility model | ||
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Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: ANHUI ACADEMY OF ELECTRIC POWER SCIENCES Effective date: 20140116 Owner name: ANHUI ACADEMY OF ELECTRIC POWER SCIENCES Effective date: 20140116 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 230601 HEFEI, ANHUI PROVINCE TO: 100031 XICHENG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140116 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Anhui Academy of Electric Power Sciences Address before: 230601 Anhui Road, Hefei, No. 299 Ziyun Road Patentee before: Anhui Academy of Electric Power Sciences |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120627 Termination date: 20180818 |