CN107024631A - With the volt-ampere characteristic test method of Multifunctional coil kind equipment testing synthesis parameter device - Google Patents
With the volt-ampere characteristic test method of Multifunctional coil kind equipment testing synthesis parameter device Download PDFInfo
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- CN107024631A CN107024631A CN201710390248.7A CN201710390248A CN107024631A CN 107024631 A CN107024631 A CN 107024631A CN 201710390248 A CN201710390248 A CN 201710390248A CN 107024631 A CN107024631 A CN 107024631A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The present invention relates to a kind of volt-ampere characteristic test method of use Multifunctional coil kind equipment testing synthesis parameter device：The display control section of test device controls sine wave experiment power supply of the program control experiment power supply to tested voltage transformer output voltage continuously adjustabe；The electric current and voltage signal for the experiment power supply that measurement meter is exported to program control experiment power supply are acquired, and are sent to the display control section progress data processing；Wherein, the experiment power supply that program control experiment power supply is exported is controlled, pointwise boosting is carried out based on multiple electrical voltage points that C-V characteristic is set, measurement table measurement measures exciting current corresponding with each electrical voltage point；The numerical value of each electrical voltage point and its correspondence field circuit is recorded by the display control section, and the calculating for carrying out C-V characteristic according to the numerical value of record is handled.The present invention can perform the volt-ampere characteristic test of voltage transformer with high efficient and reliable, and automaticity is high, be that electric power detection service work brings great convenience.
Description
Technical field
It is more particularly to a kind of to integrate ginseng with Multifunctional coil kind equipment the present invention relates to a kind of comprehensive electric testing device
The volt-ampere characteristic test method of number test device.
Background technology
Coil kind equipment (such as all kinds of transformers, transformer) occupies extremely important in the various kinds of equipment of power system
Status, and its electrical test project is often more and more complicated compared with project for other equipment.Coil class is directed in the market
Each experiment of equipment all needs to configure a set of Special test instrument substantially, and test apparatus is all more heavy.Therefore one is completed to set
Standby experiment generally requires many instruments.The factors such as place and power supply are limited to, need repeatedly to remove instrument in working at the scene
Before remove after and wiring is repeated several times, operating efficiency is relatively low.
Specifically, in transformer and power transformer electrical test, set using discrete detection
For what is tested.Experiment power supply is generally adjusted using power controling box (pressure regulator).Coordinate various voltmeters, electric current again
The meter such as table and power meter is measured.Power controling box is mainly what is be made up of an automatic coupling voltage regulator, it usually needs artificial
Operation regulation, process of the test needs are artificial to adjust voltage when observing meter, must record corresponding measurement result.To operator
The requirement of member is higher, and operating process is also comparatively laborious, is unfavorable for realizing automatic measurement.With the development of electronic technology, welcome
In the digitized epoch, measuring instrument is also towards intellectuality, and digital development, current most measuring instrument all has been carried out
Digitlization, but experiment electricity is generally still used as using automatic coupling voltage regulator in the experiments such as industrial frequency withstand voltage, idling load and C-V characteristic
Source, substantially based on manual operations.Joint connection in site power controling box and measurement meter are needed during experiment, it is more time-consuming,
Automaticity is not high.
At present both at home and abroad in terms of the research of comprehensive electric testing device or relatively more rare, most of instruments are also all deposited
Single in function, the form of the equipment output result of different manufacturers also disunity is also made to the data analysis sorting and file in later stage
Into many troubles.
The content of the invention
It is an object of the invention to provide a kind of C-V characteristic of use Multifunctional coil kind equipment testing synthesis parameter device
Test method(s), can bring great convenience for electric power detection service work.
In order to achieve the above object, the technical scheme is that providing a kind of with Multifunctional coil kind equipment comprehensive parameters
The volt-ampere characteristic test method of test device：
The display control section of test device is according to the user operation instruction received, to control the program control examination of test device
Sine wave experiment power supply from electrical verification source to tested voltage transformer output voltage continuously adjustabe；
The electric current and voltage signal for the experiment power supply that the measurement meter of the test device is exported to program control experiment power supply
It is acquired, and is sent to the display control section and carries out data processing；
Wherein, the experiment power supply that program control experiment power supply is exported is controlled, is clicked through based on multiple voltages that C-V characteristic is set
Row pointwise is boosted, and measurement table measurement measures exciting current corresponding with each electrical voltage point；By the display control section to each
The numerical value of electrical voltage point and its correspondence exciting current is recorded, and the calculating for carrying out C-V characteristic according to the numerical value of record is handled.
Preferably, multiple electrical voltage points of setting, including at least the magnitude of voltage of the setting ratio of rated voltage, and are corresponded to
Magnitude of voltage under rated voltage factor；
Described setting ratio is included：20%th, 50%, 80%, 100%, 120%.
Preferably, the calculating for carrying out C-V characteristic according to the numerical value of record is handled, comprising：
Formed using the voltage of experiment power supply as abscissa, exciting current is the exciting characteristic curve of ordinate, and in curve
Upper progress flex point mark.
Preferably, the calculating for carrying out C-V characteristic according to the numerical value of record is handled, comprising：
The result of the routine test of multiple C-V characteristic is carried out to a tested voltage transformer, with the voltage transformer
The result for carrying out type approval test is compared, and judges whether the difference of the result of routine test and the result of type approval test is more than
30%.
Preferably, the calculating for carrying out C-V characteristic according to the numerical value of record is handled, comprising：
The result that multiple voltage transformers with a collection of production, same model are obtained by volt-ampere characteristic test respectively is carried out
Compare, judge whether the difference of the result of the volt-ampere characteristic test of these voltage transformers is more than 30%.
Preferably, the program control experiment power supply is by the power output end that is arranged on test device main frame, and tested
The secondary winding connection of voltage transformer, applies the voltage signal of experiment power supply to it；The voltage transformer once around
Group end leading-out terminal is grounded, and other windings are opened a way.
Preferably, before Control experiment power supply carries out pointwise boosting, interruption judgement is carried out, it is further included：
Key scan, judges to have the button of correspondence measurement interrupt instruction or switch the buttons of other pilot projects to be pressed
When, interrupt measurement；
Excessively stream judges, when judging that the electric current of institute's output test power supply exceedes the current threshold of pilot project requirement, interrupts and surveys
Amount；
Power supply judges, judges that the voltage of institute's output test power interruptions or experiment power supply exceedes the voltage that pilot project is required
During threshold value, measurement is interrupted；
After Control experiment power supply carries out pointwise boosting, voltage judgement is carried out, is reached with the voltage for determining experiment power supply
Set ceiling voltage point is without the voltage threshold that is required more than pilot project.
Preferably, the display control section, is further included：
The master control borad that 32 ARM single-chip microcomputers are constituted, and the liquid crystal display, non-volatile being connected with the master control partitioned signal
Property memory, printer, button, external memory interface and communication interface；
The master control borad of the display control section, is also scored by internal serial ports and the program control experiment power supply and measurement table
Do not connect, be controlled and data transfer.
Preferably, the program control experiment power supply is provided with the single-chip microcomputer for carrying out SPWM modulation controls, to IPM switch modules
It is controlled, to be driven by realizing that two opposite polarity reference sine waves and two-way triangular carrier are handed over to cut to produce power switch
Dynamic signal.
Preferably, the measurement meter includes measuring current transformer and voltage transformer, with the Current Mutual Inductance
The programmable amplifier that device, voltage transformer are accordingly connected, the analog-digital converter being connected with the programmable amplifier, with the modulus
The single-chip microcomputer of converter connection, and with measuring memory and the serial port module that the single-chip microcomputer of meter is connected.
The volt-ampere characteristic test method of use Multifunctional coil kind equipment testing synthesis parameter device of the present invention, its advantage exists
In：
1st, rational functional module is integrated with test device, testing equipment quantity is effectively reduced；
2nd, the volt-ampere characteristic test of voltage transformer is realized to high efficient and reliable, automaticity is high；
3rd, can there is provided the three phase frequency changing power of Frequency Adjustable amplitude modulation based on Power Electronic Technique；
4th, the measurement and calculating of the data such as voltage, electric current, power are realized by single-chip microcomputer and correlation acquisition module, is finally adopted
Liquid crystal display output result is used, and realizes the functions such as drafting exciting characteristic curve；
5th, connection plan is safe and simple, at utmost reduces work on the spot amount.
Test device and its volt-ampere characteristic test method of the present invention, once put into each grid company and equipment manufacturer
Use, will directly be brought great convenience for electric power detection service work, the safe operation of power network is effectively ensured, power network is improved
Level of security, it is to avoid the generation of major accident, the direct or indirect economic benefit that can be produced is huge.
Brief description of the drawings
Fig. 1 is the connection diagram of display control section in test device of the present invention；
Fig. 2 is the schematic diagram of program control experiment power supply in test device of the present invention；
Fig. 3 is the schematic diagram of measurement meter in test device of the present invention；
Fig. 4 is the wiring diagram that test device of the present invention carries out voltage transformer volt-ampere characteristic test；
Fig. 5 is the flow chart that test device of the present invention performs volt-ampere characteristic test.
Embodiment
As shown in figure 1, Multifunctional coil kind equipment testing synthesis parameter device of the present invention, includes three big parts：It is aobvious
Show control (man-machine interface) part, program control experiment power supply, multifunctional measuring meter.
Wherein, the display control section can receive user operation instruction, control program control experiment power supply and measurement meter
Each work in order, and show, print, preserve measurement result.Using 32 ARM single-chip microcomputers as core in this example, cooperation 320 ×
240 liquid crystal displays are provided with mini-printer as human-computer interaction interface, device, interior for printing out measurement result
Attached nonvolatile memory, for preserving measurement result.External memory interface and communication interface are also configured, for on-line operation.The portion
Parallel circuit is controlled by internal serial ports with program control experiment power supply and measurement meter part and transmitted with data.So that device can root
Automatic measurement is carried out according to the function of user preset.
As shown in Fig. 2 the program control experiment power supply replaces traditional self-coupling using program-controlled electronic voltage regulator
Device, it has pressure-adjustable frequency modulation function, and output voltage frequency stability is good.Based on SPWM modulation principles, two polarity phases are utilized
Anti- reference sine wave is handed over to cut with two-way triangular carrier produces power switch drive signal.Software journey is passed through with single-chip microcomputer in this example
Sequence programming realization SPWM modulating waves, control the work of high-power IPM switch modules, pass through feedback voltage and sampled voltage ratio ratio
Relatively control dutycycle realizes voltage stabilizing.The number for the SPWM modulation techniques design being so controlled by high-performance digital signal processor
Word power supply, the sine wave experiment power supply of exportable voltage continuously adjustabe.
As shown in figure 3, the multifunctional measuring meter, by a piece of High Performance SCM respectively to experiment when voltage,
Current signal carries out real-time sampling calculating, draws the electric parameters such as voltage, electric current, active power, power factor and frequency.In this example
High performance double 16 analog-digital converters are employed, main data acquisition chip are used as, it is ensured that the high accuracy of measurement.Measurement
Principle uses synchronous high-speed Sampling techniques, synchronizes sampling to voltage and current signal, sampled data is stored in into memory
In, then sampled data is carried out according to electrotechnics principle to calculate the measurement result for obtaining each electrical parameter.
Based on the test device, such as inducting-voltage proof, C-V characteristic and the no-load current that can complete voltage transformer
Experiment；At least more than 3 integrated functionalities such as inducting-voltage proof, the short-circuit impedance of 35kV and following voltage class transformer are completed, and
Disposable wiring can be realized, without external any equipment；(need to be purchased in addition) by external experiment power supply, can complete 110kV and
The attribute testing of above main transformer；Capacitive apparatus Resonance Voltage Withstand Test can be carried out as variable-frequency power sources, and simultaneously
With automatic tuning and manual tuning both of which；With multinomial defencive functions such as over-voltage and over-current overload excess temperatures, with automatic liter
Decompression and manually operated both of which.
By the present invention test device and volt-ampere characteristic test method, can carry out voltage transformer type approval test and
Routine test.Wherein, " type approval test " is to require carried out experiment in order to which can product meet the whole of technical specification；" example
Row experiment " or preventive trial, are that under the regulation of national standard or professional standard, the delivery test of progress, scene are carried out
Commissioning test, and the experiment that periodically carries out in operation.
As shown in figure 4, to voltage transformer C-V characteristic carry out type approval test wiring example in, voltage transformer to be measured
First winding end outlet terminal X ground connection, other windings open a way；Power output end on the test device main frame, even
The secondary winding (a, n end) of the voltage transformer is connect, voltage U (50Hz power frequencies, sine wave) is applied to it, and measurement is encouraged accordingly
Magnetoelectricity stream I.
By the test device of the present invention, the electrical voltage point that can be set according to C-V characteristic carries out pointwise boosting, whole
Boost process carries out excessively stream and judged and accidental interruption judgement, and boosting terminates, afterwards according to the voltage x current of whole boost process, to draw
By abscissa of U, I be the linear graph of ordinate, obtain exciting characteristic curve and carry out flex point mark.
Electrical voltage point set by the present invention, 20%, 50%, 80%, 100%, 120% including at least rated voltage and phase
Corresponding exciting current should be measured under each magnitude of voltage in the magnitude of voltage under rated voltage factor, draw curve.When application
Current value increase by 50%, and at excitation magnitude of voltage increase be not more than 10% when, then the point is the flex point of exciting characteristic curve.
And when carrying out routine test, wiring and test process are similar to the above, and can be by measurement result and pattern
Experiment correspondence result is compared, and difference is not more than 30% and is considered as test passes.In addition, same series-produced same model transformer,
The difference of its excitation property also not should be greater than 30%.It can be drawn during routine test, exciting characteristic curve can not also be made.This
The test device of invention, can respectively store to the test of many times of transformer or to each experiment of multiple transformers, count
Calculate simultaneously comparative result (such as above-mentioned difference value) of the output display to these result of the tests.
As shown in Figure 5 there is provided the method example that one carries out volt-ampere characteristic test based on test device of the present invention, its
Include procedure below：
Volt-ampere characteristic test project is selected in the human-computer interaction interface of display control section, key scan is first carried out, performs
It is corresponding with selected item to act.Interruption judgement is carried out, is such as judged by excessively stream, finds program control experiment power supply to voltage transformer
When the electric current of the experiment power supply of application exceedes current specification value, or judge to find power supply accidental interruption by power supply or find to try
When the voltage in electrical verification source exceedes voltage setting, or find to press interruption button by key scan or switch other experiments
During the button of project, measurement is interrupted.
If situation about being measured without above-mentioned interruption, test device can control program control experiment power supply, with automatic boosting
Mode applies voltage to voltage transformer to be measured, and boosts that (such as rated voltage is set according to each electrical voltage point pointwise of setting
Certainty ratio and corresponding to the magnitude of voltage under rated voltage factor), record the exciting current under each electrical voltage point.Judged by voltage,
Ensure the experiment power supply exported in real time, voltage reaches the ceiling voltage point of setting without more than defined threshold.
Calculating processing is carried out according to the voltage x current numerical value of record, exciting characteristic curve is such as drawn and carries out flex point mark,
Compare difference value of each experiment etc..During experiment, test device can be by man-machine interface, to corresponding data, result of the test
Shown, printed etc. various information, it is bent including but not limited to the virtual voltage and electric current when reaching each electrical voltage point, excitation property
Line and its flex point, difference value of each experiment etc..
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of volt-ampere characteristic test method of use Multifunctional coil kind equipment testing synthesis parameter device, it is characterised in that：
The display control section of test device is according to the user operation instruction received, to control the program control experiment electricity of test device
Sine wave experiment power supply from source to tested voltage transformer output voltage continuously adjustabe；
The electric current and voltage signal for the experiment power supply that the measurement meter of the test device is exported to program control experiment power supply are carried out
Collection, and it is sent to the display control section progress data processing；
Wherein, control the experiment power supply that program control experiment power supply is exported, based on multiple electrical voltage points that C-V characteristic is set carry out by
Point boosting, measurement table measurement measures exciting current corresponding with each electrical voltage point；By the display control section to each voltage
The numerical value of point and its correspondence exciting current is recorded, and the calculating for carrying out C-V characteristic according to the numerical value of record is handled.
2. volt-ampere characteristic test method as claimed in claim 1, it is characterised in that
Set multiple electrical voltage points, including at least the magnitude of voltage of the setting ratio of rated voltage, and corresponding to rated voltage because
Magnitude of voltage under several；
Described setting ratio is included：20%th, 50%, 80%, 100%, 120%.
3. volt-ampere characteristic test method as claimed in claim 1 or 2, it is characterised in that
The calculating processing of C-V characteristic is carried out according to the numerical value of record, comprising：
Formed using the voltage of experiment power supply as abscissa, exciting current is the exciting characteristic curve of ordinate, and enterprising in curve
Row flex point is marked.
4. volt-ampere characteristic test method as claimed in claim 1 or 2, it is characterised in that
The calculating processing of C-V characteristic is carried out according to the numerical value of record, comprising：
The result of the routine test of multiple C-V characteristic is carried out to a tested voltage transformer, is carried out with the voltage transformer
The result of type approval test is compared, and judges whether the difference of the result of routine test and the result of type approval test is more than 30%.
5. volt-ampere characteristic test method as claimed in claim 1 or 2, it is characterised in that
The calculating processing of C-V characteristic is carried out according to the numerical value of record, comprising：
To comparing with a collection of production, the result that multiple voltage transformers of same model are obtained by volt-ampere characteristic test respectively
Compared with, judge the volt-ampere characteristic test of these voltage transformers result difference whether be more than 30%.
6. volt-ampere characteristic test method as claimed in claim 1, it is characterised in that
The program control experiment power supply is by the power output end that is arranged on test device main frame, with tested voltage transformer
Secondary winding is connected, and applies the voltage signal of experiment power supply to it；The first winding end leading-out terminal of the voltage transformer
Ground connection, other windings are opened a way.
7. volt-ampere characteristic test method as claimed in claim 1, it is characterised in that
Before Control experiment power supply carries out pointwise boosting, interruption judgement is carried out, it is further included：
Key scan, when judging to have the button of correspondence measurement interrupt instruction or switching the buttons of other pilot projects and be pressed, in
Disconnected measurement；
Excessively stream judges, when judging that the electric current of institute's output test power supply exceedes the current threshold of pilot project requirement, interrupts measurement；
Power supply judges, judges that the voltage of institute's output test power interruptions or experiment power supply exceedes the voltage threshold that pilot project is required
When, interrupt measurement；
After Control experiment power supply carries out pointwise boosting, voltage judgement is carried out, to determine that it is set that the voltage of experiment power supply reaches
The ceiling voltage point put is without the voltage threshold that is required more than pilot project.
8. volt-ampere characteristic test method as claimed in claim 1, it is characterised in that
The display control section, is further included：
The master control borad that 32 ARM single-chip microcomputers are constituted, and be connected with the master control partitioned signal liquid crystal display, non-volatile deposit
Storage, printer, button, external memory interface and communication interface；
The master control borad of the display control section, is also connected respectively by internal serial ports with the program control experiment power supply and measurement table meter
Connect, be controlled and data transfer.
9. volt-ampere characteristic test method as claimed in claim 8, it is characterised in that
The program control experiment power supply is provided with the single-chip microcomputer for carrying out SPWM modulation controls, to be controlled to IPM switch modules, with
Power switch drive signal is produced by realizing two opposite polarity reference sine waves with the friendship section of two-way triangular carrier.
10. volt-ampere characteristic test method as claimed in claim 9, it is characterised in that
The measurement meter includes measuring current transformer and voltage transformer, with the current transformer, mutual induction of voltage
The programmable amplifier that device is accordingly connected, the analog-digital converter being connected with the programmable amplifier is connected with the analog-digital converter
Single-chip microcomputer, and with measuring the memory that is connected of single-chip microcomputer and serial port module of meter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710390248.7A CN107024631A (en) | 2017-05-27 | 2017-05-27 | With the volt-ampere characteristic test method of Multifunctional coil kind equipment testing synthesis parameter device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710390248.7A CN107024631A (en) | 2017-05-27 | 2017-05-27 | With the volt-ampere characteristic test method of Multifunctional coil kind equipment testing synthesis parameter device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474430A (en) * | 2020-04-20 | 2020-07-31 | 广东电网有限责任公司 | Excitation characteristic testing device of voltage transformer |
| CN114114133A (en) * | 2021-11-24 | 2022-03-01 | 国网江苏省电力有限公司营销服务中心 | Electricity meter power-on testing device |
| CN115792478A (en) * | 2023-02-06 | 2023-03-14 | 国网浙江省电力有限公司电力科学研究院 | Method and system for realizing composite frequency test by using broadband volt-ampere characteristic meter |
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| CN204495898U (en) * | 2015-01-30 | 2015-07-22 | 国网上海市电力公司 | A kind of transformer superpotential on-line monitoring system |
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| CN102707173A (en) * | 2012-06-11 | 2012-10-03 | 吉林省电力有限公司延边供电公司 | Tester |
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| CN111474430A (en) * | 2020-04-20 | 2020-07-31 | 广东电网有限责任公司 | Excitation characteristic testing device of voltage transformer |
| CN114114133A (en) * | 2021-11-24 | 2022-03-01 | 国网江苏省电力有限公司营销服务中心 | Electricity meter power-on testing device |
| CN115792478A (en) * | 2023-02-06 | 2023-03-14 | 国网浙江省电力有限公司电力科学研究院 | Method and system for realizing composite frequency test by using broadband volt-ampere characteristic meter |
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