CN207424128U - For low tension switch and control device harmonic wave jamming immunity tester - Google Patents
For low tension switch and control device harmonic wave jamming immunity tester Download PDFInfo
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- CN207424128U CN207424128U CN201721212080.2U CN201721212080U CN207424128U CN 207424128 U CN207424128 U CN 207424128U CN 201721212080 U CN201721212080 U CN 201721212080U CN 207424128 U CN207424128 U CN 207424128U
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Abstract
Include the utility model discloses one kind for low tension switch and control device harmonic wave jamming immunity tester, the experimental rig：Voltage acquisition module, for gathering AC sine wave from AC power and being converted into digital signal；Control calculator, for receive from the voltage acquisition module as synchronizing signal digital signal and voltage signal magnitude is calculated according to the digital signal, simulate and recovery voltage waveform and control point be set on the voltage waveform；Full-control type copped wave module, the dominating pair of vertices AC sine wave for being set according to the control calculator carry out copped wave；Pressure regulator, for adjusting the AC power to the output voltage of the copped wave module；Measuring device, for measuring test loop electric current and each harmonic component value；The limitation that of high cost, bulky experiment power supply has been got around for low tension switch and control device harmonic wave jamming immunity tester using the above structure, and parameter regulation is convenient.
Description
Technical field
The utility model is related to electrical equipment detection fields more particularly to one kind to be used for low tension switch and control device harmonic wave
Jamming immunity tester.
Background technology
The standard of harmonic current test Main Basiss is in low voltage switch equipment and control device immunity experiment《GB
14048.2-2008 low voltage switch equipments and control device part 2：Breaker》.F.4 F.4.1 harmonic wave is electric in immunity experiment
Current test, it is therefore an objective to low voltage switch equipment and control device be examined to resist the ability of various electric power network harassing and wrecking.
Harmonic current test request in low voltage switch equipment and control device immunity experiment：In test requirements document harmonic current
Under, the duration of false tripping immunity to interference should be 10 times of the drop-away time for being equivalent to two times of current settings, and (harmonic current has
Valid value is maximum up to 4000A, and the drop-away time scope of two times of current settings is 8 seconds to 270 seconds), wherein the harmonic source in experiment
Electric current is made of two half-waves equal in magnitude and opposite polarity, it is specified that as follows in each cycle:
(1) the current lead-through time was≤21% cycle to half-wave；
(2) peak factor >=2.1 (peak factor is current peak divided by current wave virtual value)；
(3) test current is made of fundamental wave and 3 times, 5 times and 7 order harmonic components, and harmonic components are at least fundametal compoment
Following ratio:
3 subharmonic ＞ 60%；
5 subharmonic ＞ 14%；
7 subharmonic ＞ 7%.
At present in low voltage switch equipment and control device immunity experiment harmonic current test there are mainly two types of testing program,
One kind is to use programmable power supply in parallel as experiment power supply, another by pressure regulator and current lifting device raising test loop electric current
Kind is that multiple magnetic circuit transformer is used to carry out copped waves as experiment power supply by multiple high-power thyristors in parallel and obtain meeting experiment
The harmonic current of standard requirement.Above two scheme has the defects of respective, the former programmable power supply unit price 10W-20W it
Between, and power is relatively low, it is necessary to multiple used in parallel, cost is too high；The latter needs multipath magnetic circuit power supply as experiment power supply, if
It is standby it is of high cost, volume is big, test site is fixed, flexibility shortcoming, and thyristor is half control type device, can to sine wave into
Row band angle is closed a floodgate, but can only voluntarily be turned off by current over-zero, and sine wave can be selected wave band and be only limitted to half-wave final stage, profit
It is very low with rate.
Utility model content
The purpose of this utility model is to provide one kind and is used for low tension switch and control device harmonic wave jamming immunity tester, with
Solve the financial cost height of low tension switch and control device harmonic wave jamming immunity tester, volume is big, using flexible is poor and profit
With rate it is low the problem of.
To achieve these goals, the utility model discloses one kind to be used for low tension switch and control device harmonic wave immunity to interference
Experimental rig, including：Voltage acquisition module, for gathering AC sine wave from AC power and being converted into digital signal；Control
Calculator processed is electrically connected with the voltage acquisition module, is synchronously believed for receiving the conduct from the voltage acquisition module
Number digital signal and voltage signal magnitude is calculated according to the digital signal, simulate recovery voltage waveform and in the voltage
Control point is set on waveform；Full-control type copped wave module is electrically connected with the AC power and the control calculator, uses respectively
Copped wave, the output terminal of the copped wave module and examination are carried out in the dominating pair of vertices AC sine wave set according to the control calculator
Test sample electric connection；Pressure regulator is electrically connected between the AC power and the copped wave module, for adjusting the friendship
Galvanic electricity source is to the output voltage of the copped wave module；Measuring device is electrically connected with the test specimen, is tested back for measuring
Road electric current and each harmonic component value.
Compared with prior art, the utility model gets around for low tension switch and control device harmonic wave jamming immunity tester
The limitation of of high cost, bulky experiment power supply, required power supply is derived from power grid distribution box in experiment, use full-control type copped wave mould
Test loop voltage signal is converted into digital quantity using voltage acquisition module and is sent into control calculator, calculated by control by block
Device calculates voltage signal magnitude, simulates recovery voltage waveform, control point is set on voltage waveform, reaches freely to adjust with this and cut
The function of the copped wave point of ripple module realizes the copped wave function to any one section of conventional sinusoidal ripple electric current, facilitate adjust test current,
The harmonic component of peak factor, test loop ON time and each harmonic components.
It is preferred that the output terminal of the copped wave module is electrically connected by current lifting device and the test specimen, the up-flow
Device is used to the high voltage low current of copped wave module output being converted into low-voltage and high-current to act on the test specimen.
It is preferred that the copped wave module includes IGBT units and the IGBT drivers being electrically connected with the IGBT units.
It is preferred that the IGBT units include the igbt transistor of two two-way inverse parallel connections.
It is preferred that it is described further included for low tension switch and control device harmonic wave jamming immunity tester it is mono- with the IGBT
The buffer circuit that member is electrically connected, the overvoltage when buffer circuit is used to absorb the igbt transistor ON/OFF and
Overcurrent.
It is preferred that the buffer circuit include the collector for being connected to two igbt transistors and emitting stage it
Between two RC series circuits.
It is preferred that the measuring device is oscillograph.
It is preferred that it is described by low tension switch and control device harmonic wave jamming immunity tester further include with it is described control based on
The human-computer interaction module that device is electrically connected is calculated, for showing and setting the copped wave point of the copped wave module.
It is preferred that the human-computer interaction module includes digital display tube and key-press module.
Description of the drawings
Fig. 1 is that the utility model embodiment is former for the structure of low tension switch and control device harmonic wave jamming immunity tester
Reason figure.
Fig. 2 is that the utility model embodiment connects for low tension switch and the electrical of control device harmonic wave jamming immunity tester
Connect schematic diagram.
Specific embodiment
For technology contents, structure feature, realization principle and the objects and the effects of the utility model are described in detail, with
Lower combination embodiment simultaneously coordinates attached drawing to be explained in detail.
The utility model discloses one kind for low tension switch and control device harmonic wave jamming immunity tester, such as Fig. 1 and
Shown in Fig. 2, including voltage acquisition module 1, control calculator 2, full-control type copped wave module 3, pressure regulator 4 and measuring device 5.Control
Calculator 2 is electrically connected with voltage acquisition module 1 and copped wave module 3, and in the present embodiment, control calculator 2 is preferably monolithic
Machine.Voltage acquisition module 1 is used to gather AC sine wave from AC power 9 and be converted into digital signal to carry as synchronizing signal
Supply control calculator 2, in the present embodiment, voltage acquisition module 1 specifically uses voltage transformer 10 (as shown in Figure 2).It hands over
Galvanic electricity source 9 is derived from power grid distribution box, has broken away from the constraint of Special test power supply.Control calculator 2 electrical with voltage acquisition module 1
Connection, for receive from voltage acquisition module 1 as synchronizing signal digital signal and according to the digital signal calculate electricity
Signal amplitude is pressed, simulate recovery voltage waveform and control point is set on the voltage waveform.Copped wave module 3 respectively with alternating current
Source 9 and control calculator 2 are electrically connected, and the copped wave to AC sine wave, output terminal are completed under the control of control calculator 2
It is electrically connected with test specimen 100.Pressure regulator 4 is electrically connected between AC power 9 and copped wave module 3, is exchanged for adjusting
Power supply 9 is to the output voltage of copped wave module 3.Measuring device 5 is electrically connected with test specimen 100, for measuring test loop electricity
Stream and each harmonic component value are preferably oscillograph.In the present embodiment, test specimen 100 is electronic low pressure circuit breaker, is harmonic wave
The test object that harmonic current is tested in immunity experiment.
Compared with prior art, the utility model gets around for low tension switch and control device harmonic wave jamming immunity tester
The limitation of of high cost, bulky experiment power supply, required power supply is derived from power grid distribution box in experiment, use full-control type copped wave mould
Test loop voltage signal is converted into digital quantity using voltage acquisition module 1 and is sent into control calculator 2, counted by control by block 3
It calculates device 2 and calculates voltage signal magnitude, simulate recovery voltage waveform, control point on voltage waveform is set, free tune is reached with this
The function of the copped wave point of copped wave module 3 is saved, the copped wave function to any one section of conventional sinusoidal ripple electric current is realized, adjusting is facilitated to test
Electric current, peak factor, the harmonic component of test loop ON time and each harmonic components.
Since the loop current needed in low tension switch and control device harmonic wave immunity experiment is bigger, harmonic current
Virtual value is maximum up to 4000A, another for low tension switch and control device harmonic wave jamming immunity tester in the utility model
In embodiment, the output terminal of copped wave module 3 is electrically connected by current lifting device 6 and test specimen 100, and current lifting device 6 is used for copped wave
The high voltage low current that module 3 exports is converted into low-voltage and high-current and acts on test specimen 100, holds not increasing test loop
In the case of amount, test current is improved.
In addition, for the ease of observing and setting copped wave point position, the utility model is used for low tension switch and control device harmonic wave
Jamming immunity tester is additionally provided with the human-computer interaction module 8 being electrically connected with control calculator 2, in the present embodiment, man-machine
Interactive module 8 includes digital display tube 80 and key-press module 81.
The considerations of according to the requirement of the full control characteristic of copped wave module 3 and for economy and efficiency, in the present embodiment,
Copped wave module 3 is driven using the IGBT units 30 of igbt transistor and IGBT drivers 31 is included referring again to Fig. 2, IGBT
Device 31 is electrically connected with control calculator 2, and IGBT units 30 complete the copped wave to sine wave in specified angle ON/OFF,
IGBT units 30 are preferably the igbt transistor of two two-way inverse parallel connections, in order to protect igbt transistor from abnormal current
With the impact of voltage, in another preferred embodiment of the utility model, the buffering being electrically connected with IGBT units 30 is additionally provided with
Circuit 7, buffer circuit 7 are used to absorb the overvoltage and overcurrent during igbt transistor ON/OFF.The buffer circuit 7 is at this
It is preferably RC series circuits in embodiment, i.e., is respectively provided between the collector and emitting stage of two igbt transistors there are one RC
Series circuit, such as the R1/C1 and R2/C2 in Fig. 2, economical and convenient, it is easy to accomplish.
Use the above-mentioned specific experiment process for low tension switch and control device harmonic wave jamming immunity tester for：It carries out
When harmonic current is tested in immunity experiment, 4 output voltage of pressure regulator is first adjusted to copped wave that is minimum and setting copped wave module 3
Point is to set the angle of flow of igbt transistor, shut-off angle by human-computer interaction module 8 and microcontroller in the present embodiment
Degree (the current lead-through time was≤21% cycle to half-wave, i.e., angle of flow is not more than 75.6 ° with shut-off angle interval)；Then
The output voltage of pressure regulator 4 is gradually increased, by oscilloscope measurement by the test current in test specimen 100, when experiment electricity
When flow valuve reaches test requirements document current value about 1/4-1/6, whether following three conditions are met by oscilloscope measurement current waveform：
A, it is not more than 4.2ms per half-wave current ON time；
B, whether peak factor is greater than or equal to 2.1；
C, whether each harmonic components meet the following value of at least fundametal compoment：3 subharmonic ＞ 60%, 5 subharmonic ＞
14%, 7 subharmonic ＞ 7%.
If cannot meet above-mentioned tri- conditions of A, B, C simultaneously, harmonic current is not inconsistent standardization requirement, it is necessary to pass through people
Machine interactive module 8 and microcontroller readjust the angle of flow of igbt transistor, shut-off angle, and it is as follows to adjust process：
If the 1, being more than 4.2ms per half-wave current ON time, increase the angle of flow of igbt transistor or reduce and close
Angle of rupture degree, until the two difference is not more than 75.6 °；
If the 2, peak factor is not more than 2.1, increases the angle of flow of igbt transistor or reduce shut-off angle, reduce
ON time reduces the virtual value per half-wave current, and half-wave current peak value/virtual value numerical value is made to be greater than or equal to 2.1；
If the 3, each harmonic components are unsatisfactory for numerical value as defined in above-mentioned condition C, igbt transistor is increasedd or decreased simultaneously
Angle of flow and shut-off angle, make every half-wave current conducting section integral forward lead or rear move.
According to more than adjusting method, until current waveform meets tri- conditions of A, B, C as defined in standard simultaneously.
If current waveform meets three above condition simultaneously, continue to increase by 4 output voltage of pressure regulator, when oscillograph is surveyed
The virtual value by the test current in test specimen 100 of amount starts timing when reaching standard requirement, until test specimen 100
Until dropout, this time is the duration of false tripping immunity to interference.If it is whole that the duration is greater than or equal to two times of electric currents
10 times of the drop-away time of definite value, then it is assumed that test specimen 100 is tested by harmonic current in immunity experiment；If this continues
Time is less than 10 times of the drop-away time of two times of current settings, then it is assumed that test specimen 100 is not by humorous in immunity experiment
Ripple testing current.
The utility model is described in detail above for low tension switch and control device harmonic wave jamming immunity tester and profit
The specific method tested with the experimental rig has broken away from the limitation of traditional Special test power supply, has significantly saved experiment
Cost using wholly-controled device igbt transistor as copped wave equipment, converts loop voltage signal using voltage acquisition module 1
It is sent into for digital quantity in microcontroller, voltage signal magnitude is calculated by microcontroller, recovery voltage waveform is simulated, is taken on voltage waveform
Point is reached the function of the angle of flow for freely adjusting IGBT and shut-off angle with this, realized to conventional sinusoidal ripple electric current any one
The copped wave function of section facilitates the harmonic wave point for adjusting test current, peak factor, test loop ON time and each harmonic components
It measures, in addition testing program uses low-voltage method, and the test voltage (within 5V) in 100 circuit of test specimen is reduced by current lifting device 6,
The test current in 100 circuit of test specimen is improved, adds the security of experimental rig, experimental rig is reduced and is obtained from power grid
Power.
Above disclosed is only the preferred embodiments of the utility model, cannot limit the utility model with this certainly
Interest field, therefore equivalent variations made according to present utility model application the scope of the claims still fall within the utility model and are covered
Scope.
Claims (9)
1. one kind is used for low tension switch and control device harmonic wave jamming immunity tester, which is characterized in that including：
Voltage acquisition module, for gathering AC sine wave from AC power and being converted into digital signal；
Calculator is controlled, is electrically connected with the voltage acquisition module, for receiving the conduct from the voltage acquisition module
The digital signal of synchronizing signal simultaneously calculates voltage signal magnitude according to the digital signal, simulates recovery voltage waveform and in institute
It states and control point is set on voltage waveform；
Full-control type copped wave module is electrically connected respectively with the AC power and the control calculator, for according to the control
The dominating pair of vertices AC sine wave that calculator processed is set carries out copped wave, and the output terminal of the copped wave module electrically connects with test specimen
It connects；
Pressure regulator is electrically connected between the AC power and the copped wave module, for adjusting the AC power to institute
State the output voltage of copped wave module；
Measuring device is electrically connected with the test specimen, for measuring test loop electric current and each harmonic component value.
2. according to claim 1 be used for low tension switch and control device harmonic wave jamming immunity tester, which is characterized in that
The output terminal of the copped wave module is electrically connected by current lifting device and the test specimen, and the current lifting device is used for the copped wave
The high voltage low current of module output is converted into low-voltage and high-current to act on the test specimen.
3. according to claim 1 be used for low tension switch and control device harmonic wave jamming immunity tester, which is characterized in that
The copped wave module includes IGBT units and the IGBT drivers being electrically connected with the IGBT units.
4. according to claim 3 be used for low tension switch and control device harmonic wave jamming immunity tester, which is characterized in that
The IGBT units include the igbt transistor of two two-way inverse parallel connections.
5. according to claim 4 be used for low tension switch and control device harmonic wave jamming immunity tester, which is characterized in that
The buffer circuit being electrically connected with the IGBT units is further included, the buffer circuit is led for absorbing the igbt transistor
Overvoltage and overcurrent during logical/shut-off.
6. according to claim 5 be used for low tension switch and control device harmonic wave jamming immunity tester, which is characterized in that
The buffer circuit includes two RC being connected between the collector and emitting stage of two igbt transistors series connection
Circuit.
7. according to claim 1 be used for low tension switch and control device harmonic wave jamming immunity tester, which is characterized in that
The measuring device is oscillograph.
8. according to claim 1 be used for low tension switch and control device harmonic wave jamming immunity tester, which is characterized in that
The human-computer interaction module being electrically connected with the control calculator is further included, for showing and setting the copped wave of the copped wave module
Point.
9. according to claim 8 be used for low tension switch and control device harmonic wave jamming immunity tester, which is characterized in that
The human-computer interaction module includes digital display tube and key-press module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721212080.2U CN207424128U (en) | 2017-09-19 | 2017-09-19 | For low tension switch and control device harmonic wave jamming immunity tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721212080.2U CN207424128U (en) | 2017-09-19 | 2017-09-19 | For low tension switch and control device harmonic wave jamming immunity tester |
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| CN207424128U true CN207424128U (en) | 2018-05-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107543991A (en) * | 2017-09-19 | 2018-01-05 | 东莞市广安电气检测中心有限公司 | For low tension switch and control device harmonic wave jamming immunity tester and test method |
-
2017
- 2017-09-19 CN CN201721212080.2U patent/CN207424128U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107543991A (en) * | 2017-09-19 | 2018-01-05 | 东莞市广安电气检测中心有限公司 | For low tension switch and control device harmonic wave jamming immunity tester and test method |
| CN107543991B (en) * | 2017-09-19 | 2024-05-28 | 东莞市广安电气检测中心有限公司 | Harmonic immunity test device and test method for low-voltage switch and control equipment |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180529 Termination date: 20190919 |
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| CF01 | Termination of patent right due to non-payment of annual fee |