CN108037475A - A kind of capacitance type potential transformer harmonic propagation characteristic test system - Google Patents
A kind of capacitance type potential transformer harmonic propagation characteristic test system Download PDFInfo
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- CN108037475A CN108037475A CN201711132870.4A CN201711132870A CN108037475A CN 108037475 A CN108037475 A CN 108037475A CN 201711132870 A CN201711132870 A CN 201711132870A CN 108037475 A CN108037475 A CN 108037475A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
The present invention provides a kind of capacitance type potential transformer harmonic propagation characteristic test system, including input module, boost module, processing module and correcting module.Waveform generator in the present invention produces square-wave signal, and square-wave signal radio-frequency component is not single, while can be used for the transmission characteristic of independent analysis each harmonic again, and easy to operate, workload is small.Technical solution provided by the invention obtains the measurement error of capacitance type potential transformer by the harmonic propagation characteristic curve of resistance-capacitance type voltage transformer, and the Ratio for error modification of capacitance type potential transformer is calculated according to the measurement error of capacitance type potential transformer, and then secondary side measurement harmonic voltage is modified by the Ratio for error modification of capacitance type potential transformer, overcome the harmonic measure problem of dtmf distortion DTMF of capacitance type potential transformer in the prior art.
Description
Technical field
The present invention relates to a kind of pilot system, and in particular to a kind of capacitance type potential transformer harmonic propagation attribute testing system
System.
Background technology
In power grid, in showing for application capacitance type potential transformer (Capacitor Voltage Transformers, CVT)
, the measurement data of harmonic voltage generally derives from capacitance type potential transformer, due to containing inside capacitance type potential transformer
Some capacitor cell and electromagnetic unit form resonant tank, its frequency response is only suitable for the measurement of specified power frequency, in fundamental frequency
Under have accurate no-load voltage ratio relation, but cannot generally reach the class of accuracy requirement of fundamental wave for each harmonic no-load voltage ratio, and under each frequency
No-load voltage ratio differs.Transmission of the capacitance type potential transformer to harmonic wave is actual to have occurred that nonlinear change, its secondary side harmonic wave
Voltage cannot react high-pressure side harmonic wave situation by nominal transformation ratio, although low-pressure side harmonic measure equipment precision can meet to want
Ask, but it is horizontal also to reduce the capacitance type potential transformer secondary side harmonic voltage after distortion.Therefore capacitor voltage is passed through
There are error for each harmonic voltage content and voltage total harmonic distortion factor in the power grid that transformer measurement obtains, it is impossible to truly
React actual harmonics level in power grid.
And in existing Capacitive Voltage Transformer Test system, signal input uses harmonic signal generating means, needs
Accurate Adjustment Tests are gradually all carried out to harmonic wave, the waste that substantial amounts of repeated work causes time and efforts can be produced.This
Outside, existing pilot system more using electromagnetic potential transformer as being contrasted with capacitance type potential transformer measurement result
Standard output device.And electromagnetic potential transformer insulation system is complicated, volume is big, and the aperiodic component in short circuit current flow
Magnetic circuit saturation will be caused, the accuracy of measurement of electromagnetic potential transformer can be influenced, and then cause capacitance type potential transformer to miss
The modified accuracy of difference is relatively low.Meanwhile although existing pilot system have studied what harmonic wave measured capacitance type potential transformer
Influence, but fail to provide transmission characteristic rule of the harmonic wave by capacitance type potential transformer, the harmonic wave of capacitance type potential transformer
Measurement problem of dtmf distortion DTMF still remains.
The content of the invention
In order to overcome the accuracy of the error correction of above-mentioned capacitance type potential transformer in the prior art relatively low and there is electricity
The defects of harmonic measure problem of dtmf distortion DTMF of appearance formula voltage transformer, the present invention provide a kind of capacitance type potential transformer harmonic propagation
Characteristic test system, including for producing square-wave signal and square-wave signal being sent to the input module of boost module, for inciting somebody to action
Square-wave signal is boosted and the square-wave signal after boosting is sent to the boost module of processing module, for according to square-wave signal
Export secondary side standard harmonic voltage and secondary side measurement harmonic voltage and resistance-capacitance type is generated according to secondary side standard harmonic voltage
The characteristic processing module of harmonic propagation of voltage transformer and for the harmonic propagation according to resistance-capacitance type voltage transformer
The correcting module that characteristic curve is modified secondary side measurement harmonic voltage, passes through the harmonic propagation of resistance-capacitance type voltage transformer
Characteristic curve is modified secondary side measurement harmonic voltage, the secondary side measurement harmonic wave of revised capacitance type potential transformer
Voltage accuracy is high.
In order to realize foregoing invention purpose, the present invention adopts the following technical scheme that：
The present invention provides a kind of capacitance type potential transformer harmonic propagation characteristic test system, including：
Input module, boost module is sent to for producing square-wave signal, and by square-wave signal；
Boost module, processing module is sent to for square-wave signal to be boosted, and by the square-wave signal after boosting；
Processing module, for exporting secondary side standard harmonic voltage and secondary side measurement harmonic voltage according to square-wave signal,
And the harmonic propagation characteristic curve of resistance-capacitance type voltage transformer is generated according to secondary side standard harmonic voltage；
Correcting module, for the harmonic propagation characteristic curve according to resistance-capacitance type voltage transformer to secondary side measurement harmonic wave electricity
Pressure is modified.
The input module includes waveform generator, and the waveform generator produces square-wave signal, and square-wave signal is sent out
Give boost module.
The boost module includes step-up transformer, and the step-up transformer receives the square-wave signal that input module is sent,
Square-wave signal is boosted into experiment setting voltage, and the square-wave signal that boost to experiment setting voltage will be sent to processing mould
Block.
The capacity of the step-up transformer is not less than 1000kVA.
The processing module includes resistance-capacitance type voltage transformer, capacitance type potential transformer and waveform analyzer.
The resistance-capacitance type voltage transformer receives the square-wave signal that boost module is sent, and exports secondary side standard harmonic electricity
Press to waveform analyzer.
The capacitance type potential transformer receives the square-wave signal that boost module is sent, and exports secondary side measurement harmonic wave electricity
Press to waveform analyzer.
The waveform analyzer receives secondary side standard harmonic voltage and secondary side measurement harmonic voltage, and according to secondary side
Standard harmonic voltage and secondary side measurement harmonic voltage generate respectively resistance-capacitance type voltage transformer harmonic propagation characteristic curve and
The harmonic propagation characteristic curve of capacitance type potential transformer.
The correcting module includes：
Comparison unit, for by the harmonic propagation characteristic curve of resistance-capacitance type voltage transformer and capacitance type potential transformer
Harmonic propagation characteristic curve is contrasted, and obtains the measurement error of capacitance type potential transformer；
Computing unit, for calculating the error of capacitance type potential transformer according to the measurement error of capacitance type potential transformer
Correction factor；
Amending unit, for the Ratio for error modification according to capacitance type potential transformer to secondary side measure harmonic voltage into
Row is corrected.
The computing unit is specifically used for：
The Ratio for error modification of capacitance type potential transformer is calculated as follows：
Wherein：K represents the Ratio for error modification of capacitance type potential transformer, εcvtRepresent the survey of capacitance type potential transformer
Measure error, UcvtRepresent the secondary side measurement harmonic voltage of capacitance type potential transformer.
Compared with the immediate prior art, technical solution provided by the invention has the advantages that：
Capacitance type potential transformer harmonic propagation characteristic test system provided by the invention includes being used to produce square-wave signal
And square-wave signal is sent to the input module of boost module, for square-wave signal to be boosted and believes the square wave after boosting
Number it is sent to the boost module of processing module, for exporting secondary side standard harmonic voltage according to square-wave signal and secondary side measures
Harmonic voltage and the characteristic processing of harmonic propagation that resistance-capacitance type voltage transformer is generated according to secondary side standard harmonic voltage
Module and for the harmonic propagation characteristic curve according to resistance-capacitance type voltage transformer to secondary side measurement harmonic voltage repair
Positive correcting module, measures harmonic voltage to secondary side by the harmonic propagation characteristic curve of resistance-capacitance type voltage transformer and repaiies
Just, the accuracy of the secondary side measurement harmonic voltage of capacitance type potential transformer after correcting is improved；
In capacitance type potential transformer harmonic propagation characteristic test system provided by the invention, waveform generator produces square wave
Signal, for the square-wave signal compared with the harmonic signal used in the prior art, square-wave signal radio-frequency component is not single, while again may be used
Easy to operate for the transmission characteristic of independent analysis each harmonic, workload is small；
In capacitance type potential transformer harmonic propagation characteristic test system provided by the invention, resistance-capacitance type voltage transformer is defeated
Go out secondary side standard harmonic voltage, and the harmonic propagation characteristic curve of resistance-capacitance type voltage transformer generated by waveform analyzer,
Using the harmonic propagation characteristic curve of resistance-capacitance type voltage transformer as standard, and the harmonic propagation of capacitance type potential transformer is special
The harmonic propagation characteristic curve of linearity curve and resistance-capacitance type voltage transformer is contrasted, and is improved measurement accuracy, is made measurement result
It is more accurate, it can more really reflect the harmonic voltage measurement error of capacitance type potential transformer；
In capacitance type potential transformer harmonic propagation characteristic test system provided by the invention, processing module includes resistance-capacitance type
Voltage transformer, capacitance type potential transformer and waveform analyzer, wherein resistance-capacitance type voltage transformer and capacitor voltage mutual inductance
Device receives the square-wave signal of boost module transmission respectively, and exports secondary side standard harmonic voltage and secondary side measurement harmonic wave respectively
Voltage generates respectively to waveform analyzer, waveform analyzer according to secondary side standard harmonic voltage and secondary side measurement harmonic voltage
The harmonic propagation characteristic curve of resistance-capacitance type voltage transformer and the harmonic propagation characteristic curve of capacitance type potential transformer, therefore this
The harmonic wave that the technical solution that invention provides not only gives the resistance-capacitance type voltage transformer for being used as standard by waveform analyzer passes
Characteristic curve is passed, the harmonic propagation characteristic curve of capacitance type potential transformer is given, passes through resistance-capacitance type voltage transformer
Harmonic propagation characteristic curve obtains the measurement error of capacitance type potential transformer, and is missed according to the measurement of capacitance type potential transformer
Difference calculates the Ratio for error modification of capacitance type potential transformer, and then the Ratio for error modification pair for passing through capacitance type potential transformer
Secondary side measurement harmonic voltage is modified, and the harmonic measure distortion for overcoming capacitance type potential transformer in the prior art is asked
Topic.
Brief description of the drawings
Fig. 1 is capacitance type potential transformer harmonic propagation characteristic test system structure chart in the embodiment of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
The embodiment of the present invention provides a kind of capacitance type potential transformer harmonic propagation characteristic test system, and concrete structure diagram is such as
Shown in Fig. 1, including input module, boost module, processing module and correcting module, the function of above-mentioned several modules is carried out below
Introduce：
Input module therein, boost module is sent to for producing square-wave signal, and by square-wave signal；
Boost module therein, processing is sent to for square-wave signal to be boosted, and by the square-wave signal after boosting
Module；
Processing module therein, for exporting secondary side standard harmonic voltage and secondary side measurement harmonic wave according to square-wave signal
Voltage, and according to the harmonic propagation characteristic curve of secondary side standard harmonic voltage generation resistance-capacitance type voltage transformer；
Correcting module therein, measures secondary side for the harmonic propagation characteristic curve according to resistance-capacitance type voltage transformer
Harmonic voltage is modified.
Above-mentioned input module includes waveform generator, which produces square-wave signal, and square-wave signal is sent out
Boost module is given, the square-wave signal that waveform generator produces is compared with the harmonic signal used in the prior art, square-wave signal
Radio-frequency component is not single, while can be used for the transmission characteristic of independent analysis each harmonic again, and easy to operate, workload is small.
Above-mentioned boost module includes step-up transformer (capacity is not less than 1000kVA), and step-up transformer receives input mould
The square-wave signal that block is sent, experiment setting voltage is boosted to by square-wave signal, and the square wave for boosting to experiment setting voltage is believed
Number it will be sent to processing module.
Above-mentioned processing module includes resistance-capacitance type voltage transformer, capacitance type potential transformer and waveform analyzer, below
Introduce respectively：
Resistance-capacitance type voltage transformer therein receives the square-wave signal that boost module is sent, and exports secondary side standard harmonic
Voltage is to waveform analyzer.
Capacitance type potential transformer therein receives the square-wave signal that boost module is sent, and exports secondary side measurement harmonic wave
Voltage is to waveform analyzer.
Waveform analyzer therein receives secondary side standard harmonic voltage and secondary side measurement harmonic voltage, and according to secondary
Side standard harmonic voltage and secondary side measurement harmonic voltage generate the harmonic propagation characteristic curve of resistance-capacitance type voltage transformer respectively
With the harmonic propagation characteristic curve of capacitance type potential transformer.
Above-mentioned correcting module includes comparison unit, computing unit and amending unit, specific as follows：
Comparison unit therein, for the harmonic propagation characteristic curve and capacitor voltage of resistance-capacitance type voltage transformer is mutual
The harmonic propagation characteristic curve of sensor is contrasted, and obtains the measurement error of capacitance type potential transformer；
Computing unit therein, for calculating capacitance type potential transformer according to the measurement error of capacitance type potential transformer
Ratio for error modification；
Amending unit therein, harmonic wave is measured for the Ratio for error modification according to capacitance type potential transformer to secondary side
Voltage is modified.
The Ratio for error modification of capacitance type potential transformer is calculated as follows in above-mentioned computing unit：
Wherein：K represents the Ratio for error modification of capacitance type potential transformer, εcvtRepresent the survey of capacitance type potential transformer
Measure error, UcvtRepresent the secondary side measurement harmonic voltage of capacitance type potential transformer.
Technical solution provided in an embodiment of the present invention not only gives the resistance-capacitance type electricity for being used as standard by waveform analyzer
The harmonic propagation characteristic curve of mutual inductor is pressed, the harmonic propagation characteristic curve of capacitance type potential transformer is given, passes through resistance
The harmonic propagation characteristic curve of appearance formula voltage transformer obtains the measurement error of capacitance type potential transformer, and according to capacitive battery
Press the measurement error of mutual inductor to calculate the Ratio for error modification of capacitance type potential transformer, and then pass through capacitance type potential transformer
Ratio for error modification secondary side measurement harmonic voltage is modified, overcome capacitance type potential transformer in the prior art
Harmonic measure problem of dtmf distortion DTMF.
For convenience of description, each several part of apparatus described above is divided into various modules with function or unit describes respectively.
Certainly, each module or the function of unit can be realized in same or multiple softwares or hardware when implementing the application.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program
Product.Therefore, the application can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the application can use the computer for wherein including computer usable program code in one or more
The computer program production that usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The application is with reference to the flow according to the method for the embodiment of the present application, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or square frame in journey and/or square frame and flowchart and/or the block diagram.These computer programs can be provided
The processors of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices, which produces, to be used in fact
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, thus in computer or
The instruction performed on other programmable devices is provided and is used for realization in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a square frame or multiple square frames.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field with reference to above-described embodiment still can to the present invention embodiment modify or
Equivalent substitution, these are applying for this pending hair without departing from any modification of spirit and scope of the invention or equivalent substitution
Within bright claims.
Claims (10)
- A kind of 1. capacitance type potential transformer harmonic propagation characteristic test system, it is characterised in that including：Input module, boost module is sent to for producing square-wave signal, and by square-wave signal；Boost module, processing module is sent to for square-wave signal to be boosted, and by the square-wave signal after boosting；Processing module, for exporting secondary side standard harmonic voltage and secondary side measurement harmonic voltage, and root according to square-wave signal According to the harmonic propagation characteristic curve of secondary side standard harmonic voltage generation resistance-capacitance type voltage transformer；Correcting module, for the harmonic propagation characteristic curve according to resistance-capacitance type voltage transformer to secondary side measure harmonic voltage into Row is corrected.
- 2. capacitance type potential transformer harmonic propagation characteristic test system according to claim 1, it is characterised in that described Input module includes waveform generator, and the waveform generator produces square-wave signal, and square-wave signal is sent to boost module.
- 3. capacitance type potential transformer harmonic propagation characteristic test system according to claim 1, it is characterised in that described Boost module includes step-up transformer, and the step-up transformer receives the square-wave signal that input module is sent, by square-wave signal liter Experiment setting voltage is pressed onto, and the square-wave signal that boost to experiment setting voltage will be sent to processing module.
- 4. capacitance type potential transformer harmonic propagation characteristic test system according to claim 3, it is characterised in that described The capacity of step-up transformer is not less than 1000kVA.
- 5. capacitance type potential transformer harmonic propagation characteristic test system according to claim 1, it is characterised in that described Processing module includes resistance-capacitance type voltage transformer, capacitance type potential transformer and waveform analyzer.
- 6. capacitance type potential transformer harmonic propagation characteristic test system according to claim 5, it is characterised in that described Resistance-capacitance type voltage transformer receives the square-wave signal that boost module is sent, and exports secondary side standard harmonic voltage to waveform analysis Instrument.
- 7. capacitance type potential transformer harmonic propagation characteristic test system according to claim 6, it is characterised in that described Appearance formula voltage transformer receives the square-wave signal that boost module is sent, and exports secondary side and measure harmonic voltage to waveform analysis Instrument.
- 8. capacitance type potential transformer harmonic propagation characteristic test system according to claim 7, it is characterised in that described Waveform analyzer receives secondary side standard harmonic voltage and secondary side measurement harmonic voltage, and according to secondary side standard harmonic voltage With secondary side measurement harmonic voltage generate respectively resistance-capacitance type voltage transformer harmonic propagation characteristic curve and capacitor voltage it is mutual The harmonic propagation characteristic curve of sensor.
- 9. capacitance type potential transformer harmonic propagation characteristic test system according to claim 8, it is characterised in that described Correcting module includes：Comparison unit, for by the harmonic propagation characteristic curve of resistance-capacitance type voltage transformer and the harmonic wave of capacitance type potential transformer Transmission characteristic curve is contrasted, and obtains the measurement error of capacitance type potential transformer；Computing unit, for calculating the error correction of capacitance type potential transformer according to the measurement error of capacitance type potential transformer Coefficient；Amending unit, repaiies secondary side measurement harmonic voltage for the Ratio for error modification according to capacitance type potential transformer Just.
- 10. capacitance type potential transformer harmonic propagation characteristic test system according to claim 9, it is characterised in that institute Computing unit is stated to be specifically used for：The Ratio for error modification of capacitance type potential transformer is calculated as follows：<mrow> <mi>k</mi> <mo>=</mo> <mfrac> <msub> <mi>&epsiv;</mi> <mrow> <mi>c</mi> <mi>v</mi> <mi>t</mi> </mrow> </msub> <msub> <mi>U</mi> <mrow> <mi>c</mi> <mi>v</mi> <mi>t</mi> </mrow> </msub> </mfrac> </mrow>Wherein：K represents the Ratio for error modification of capacitance type potential transformer, εcvtRepresent that the measurement of capacitance type potential transformer misses Difference, UcvtRepresent the secondary side measurement harmonic voltage of capacitance type potential transformer.
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Cited By (9)
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| CN108896949A (en) * | 2018-07-12 | 2018-11-27 | 四川大学 | Capacitance type potential transformer unit impulse response method for solving based on square-wave pulse |
| CN109085527A (en) * | 2018-08-17 | 2018-12-25 | 国网江苏省电力有限公司盐城供电分公司 | Capacitance type potential transformer harmonic propagation characteristic measuring system |
| CN109406877A (en) * | 2018-09-28 | 2019-03-01 | 国网江苏省电力有限公司常州供电分公司 | The measurement method and device of capacitance type potential transformer harmonic propagation coefficient |
| CN109521387A (en) * | 2018-12-07 | 2019-03-26 | 国网江苏省电力有限公司常州供电分公司 | Obtain the method and system of capacitance type potential transformer harmonic propagation characteristic |
| CN110824405A (en) * | 2019-10-30 | 2020-02-21 | 国网新疆电力有限公司哈密供电公司 | System and method for detecting amplitude-frequency characteristics of capacitor voltage transformer |
| CN110927650A (en) * | 2019-12-03 | 2020-03-27 | 国网江苏省电力有限公司常州供电分公司 | Harmonic voltage measuring device and method for capacitor voltage transformer |
| CN111257813A (en) * | 2020-03-02 | 2020-06-09 | 国网江苏省电力有限公司电力科学研究院 | Non-contact voltage measurement system field calibration method and calibration device thereof |
| CN114579933A (en) * | 2022-05-05 | 2022-06-03 | 威胜集团有限公司 | Error measurement optimization method and device, electronic equipment and readable storage medium |
| CN115219975A (en) * | 2022-07-07 | 2022-10-21 | 中广核新能源安徽有限公司 | Device and method for measuring and correcting harmonic error of capacitor voltage transformer |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108896949A (en) * | 2018-07-12 | 2018-11-27 | 四川大学 | Capacitance type potential transformer unit impulse response method for solving based on square-wave pulse |
| CN109085527A (en) * | 2018-08-17 | 2018-12-25 | 国网江苏省电力有限公司盐城供电分公司 | Capacitance type potential transformer harmonic propagation characteristic measuring system |
| CN109406877A (en) * | 2018-09-28 | 2019-03-01 | 国网江苏省电力有限公司常州供电分公司 | The measurement method and device of capacitance type potential transformer harmonic propagation coefficient |
| CN109521387A (en) * | 2018-12-07 | 2019-03-26 | 国网江苏省电力有限公司常州供电分公司 | Obtain the method and system of capacitance type potential transformer harmonic propagation characteristic |
| CN110824405A (en) * | 2019-10-30 | 2020-02-21 | 国网新疆电力有限公司哈密供电公司 | System and method for detecting amplitude-frequency characteristics of capacitor voltage transformer |
| CN110927650A (en) * | 2019-12-03 | 2020-03-27 | 国网江苏省电力有限公司常州供电分公司 | Harmonic voltage measuring device and method for capacitor voltage transformer |
| CN111257813A (en) * | 2020-03-02 | 2020-06-09 | 国网江苏省电力有限公司电力科学研究院 | Non-contact voltage measurement system field calibration method and calibration device thereof |
| CN114579933A (en) * | 2022-05-05 | 2022-06-03 | 威胜集团有限公司 | Error measurement optimization method and device, electronic equipment and readable storage medium |
| CN115219975A (en) * | 2022-07-07 | 2022-10-21 | 中广核新能源安徽有限公司 | Device and method for measuring and correcting harmonic error of capacitor voltage transformer |
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