CN106771421A - A kind of apparatus and method that power capacitor overvoltage periodic test voltage is provided - Google Patents
A kind of apparatus and method that power capacitor overvoltage periodic test voltage is provided Download PDFInfo
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- CN106771421A CN106771421A CN201611199932.9A CN201611199932A CN106771421A CN 106771421 A CN106771421 A CN 106771421A CN 201611199932 A CN201611199932 A CN 201611199932A CN 106771421 A CN106771421 A CN 106771421A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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Abstract
The present invention relates to a kind of apparatus and method for providing power capacitor overvoltage periodic test voltage, described device includes：Remote operation unit, for setting required electric parameter under current test pattern；Cycle control unit, is sampled to the voltage under current test pattern, obtains sampled voltage signal, and the sampled voltage signal is analyzed, the other voltage-regulation instruction of output Millisecond；And power amplification unit, based on voltage-regulation instruction, test voltage being adjusted, output meets the voltage waveform and power output of the electric parameter requirement.
Description
Technical field
The invention belongs to T ＆ D Technology field, the examination of power capacitor overvoltage cycle is provided more particularly, to one kind
The apparatus and method of electrical verification pressure.
Background technology
Power capacitor overvoltage periodic test is to verify in the scope from specified minimum temperature (- 40 DEG C) to room temperature
It is interior, the special test that cycle overvoltage is carried out to examine power capacitor dielectric behavior is applied repeatedly.Power capacitor is excessively electric
Pressure periodic test is an essential link in new product evaluation.
According to the method for capacitor unit overvoltage periodic test in product standard GB/T 11024.2-2001, the side
Method proposes requirement to the waveform of overvoltage periodic test.Therefore how to meet for power capacitor overvoltage periodic test is provided
Whether the voltage waveform of standard just turns into experiment being capable of successful one of influence factor.
The content of the invention
Meet the electricity of product standard GB/T11024.2-2001 in order to be provided in power capacitor overvoltage periodic test
Pressure, the present invention provides a kind of device for providing power capacitor overvoltage periodic test voltage, described device includes remote operation
Unit, cycle control unit and power amplification unit.
Remote operation unit, tests for setting required electric parameter under current test pattern, and in test to examination
Result is tested to be recorded and real-time dynamic display；The result of remote operation unit real-time dynamic display includes the mistake of power capacitor
Voltage waveform, voltage data, current data, continuous overvoltage periodicity and accumulation overvoltage periodicity.
Cycle control unit, samples to the voltage under current test pattern, obtains sampled voltage signal, and to described
Sampled voltage signal is analyzed, the other voltage-regulation instruction of output Millisecond.
Power amplification unit, based on voltage-regulation instruction, is adjusted to test voltage, and output meets described electric
The voltage waveform and power output of parameter request.The power amplification unit includes that current rectifying and wave filtering circuit and symmetrical recommending amplify electricity
Road, wherein, the symmetrical push-pull amplifier circuit is used to realize high-power output, and the voltage exported according to cycle control unit is adjusted
Section instruction carries out power output, and exports the voltage waveform of the electric parameter requirement for meeting input.When power amplification unit according to
The voltage-regulation instruction of cycle control unit output carries out voltage output, and after being filtered by current rectifying and wave filtering circuit, waveform
Aberration rate is less than 1%, and harmonic content is less than 1%.The core component of wherein symmetrical push-pull amplifier circuit is triode.Due to three poles
The maximum effective power of pipe is 100W, and the device power output for designing in the present invention is 200kW, therefore uses thousands of three poles
Pipe parallel shunt is realizing high-power output.
Further, described device also includes AC-DC power subsystems, and it is used to provide power supply for system.
Further, described device also includes PD meter, its running status for being used to monitor described device subjects.
Further, described device also include protection location, the protection location include quick overcurrent protection with
And pre- combined floodgate and zero-position protection device, the current rectifying and wave filtering circuit that the protection location is used in power amplification unit is quick
Overcurrent protection and the pre- input signal provided with zero-position protection device of closing a floodgate, using electronic analog swtich rupturing duty
The prime driving signal of amplifying unit, is exported with rupturing duty, and protection is test for the safety of capacitor and tester.In electricity
During the overvoltage periodic test of power capacitor, the time is long, and electric current is big.Protection to test item and personnel is particularly important.By
It is the purely capacitive device of Large Copacity in test item, the electric current of abnormal increase can be produced under traditional output short circuit protection, to the damage of device
Wound is very big, it is necessary in the extremely short time internal cutting off source of trouble.The present apparatus employs electronic analog swtich, can be complete in nanoseconds
Into the prime driving signal of switch-off power amplifier section, so that the output of rupturing duty.And output end and dc source it
Between increase fly-wheel diode, give reverse current outflow increase a passage.Further, the cycle control unit uses Hall
Type numerical variable sensor collection voltages signal, and the voltage change ratio of sensor is microsecond rank, can be accurately controlled
Voltage change in boosting or pressure reduction, it is ensured that voltage will not rise and fall sharply and quickly.
Further, the remote operation unit is additionally operable to the voltage waveform of real-time dynamic display output.
Further, the symmetrical push-pull amplifier circuit can realize 25~300Hz using being controlled according to control algolithm
Frequency range, 0~99 cycle, the output of 1~999 automatic cycle circulation.
Further, described device can guarantee that the time of each cycle is 20ms by cycle control unit, and 1~
Being boosted or be depressured in 3 cycles will not produce obvious overvoltage.
According to another aspect of the present invention, the present invention provides a kind of offer power capacitor overvoltage periodic test voltage
Method, methods described includes：
Step 1, overvoltage periodic test waveform is set according to standard GB/T 11024.2-2001 in remote operation unit
Parameter, wherein voltage are changing value with time parameter, and frequency and number of repetition are fixed value；
Firing test device after the completion of step 2, parameter input, device meets standard GB/T detecting experimental condition
On the premise of the requirement of 11024.2-2001, cycle control unit is sampled to the voltage under current test pattern, is adopted
Sample voltage signal, and the sampled voltage signal is analyzed, the other voltage-regulation instruction of output Millisecond；
The voltage-regulation that step 3, power amplification unit are based on step 2 is instructed, and test voltage is adjusted, and output meets
The voltage waveform and power output of the electric parameter requirement export satisfactory voltage waveform according to the parameter for setting.
Further, the frequency for being set in the remote operation unit is 50Hz.
In sum, the present invention provides a kind of apparatus and method for providing power capacitor overvoltage periodic test voltage,
Described device carries out voltage sample from Microsecond grade Hall type numerical variable sensor, uses computer to be calculated to export symbol
The voltage-regulation instruction of input electric parameter requirement is closed, and power output is carried out by symmetrical push-pull amplifier circuit and voltage is defeated
Go out, it is ensured that the voltage-form distortion rate of output is less than 1%, and harmonic content is less than 1%, so as in power capacitor overvoltage week
In phase experiment, using the teaching of the invention it is possible to provide accurate test voltage waveform, so that the normal operation of more authentic and valid reflection equipment.
Brief description of the drawings
By reference to the following drawings, illustrative embodiments of the invention can be more fully understood by：
Fig. 1 is the device of the offer power capacitor overvoltage periodic test voltage waveform of specific embodiment of the invention
Structure chart；And
Fig. 2 is the method for the offer power capacitor overvoltage periodic test voltage waveform of specific embodiment of the invention
Flow chart.
Specific embodiment
With reference now to accompanying drawing, illustrative embodiments of the invention are introduced, however, the present invention can use many different shapes
Formula is implemented, and is not limited to embodiment described herein, there is provided these embodiments are to disclose at large and fully
The present invention, and fully pass on the scope of the present invention to person of ordinary skill in the field.For showing for being illustrated in the accompanying drawings
Term in example property implementation method is not limitation of the invention.In the accompanying drawings, identical cells/elements are attached using identical
Icon is remembered.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has to person of ordinary skill in the field
It is common to understand implication.Further it will be understood that the term limited with usually used dictionary, is appreciated that and it
The linguistic context of association area has consistent implication, and is not construed as Utopian or excessively formal meaning.
Fig. 1 is the device of the offer power capacitor overvoltage periodic test voltage waveform of specific embodiment of the invention
Structure chart.As shown in figure 1, described device includes remote operation unit 101, cycle control unit 102, power amplification unit
103rd, AC-DC power subsystems 104, PD meter 105 and protection location 106.
Remote operation unit 101, for setting required electric parameter under current test pattern.
Cycle control unit 102, samples to the voltage under current test pattern, obtains sampled voltage signal, and right
The sampled voltage signal is analyzed, the other voltage-regulation instruction of output Millisecond.
Power amplification unit 103, based on voltage-regulation instruction, is adjusted to test voltage, and output meets described
The voltage waveform and power output of electric parameter requirement.The power amplification unit includes current rectifying and wave filtering circuit 131 and symmetrically pushes away
Amplifying circuit 132 is drawn, wherein, the symmetrical push-pull amplifier circuit 132 is used to realize high-power output, and according to cycle control list
The voltage-regulation instruction of the output of unit 102 carries out power output, and exports the voltage waveform of the electric parameter requirement for meeting input.When
The voltage-regulation instruction that power amplification unit 103 is exported according to cycle control unit 102 carries out voltage output, and is filtered by rectification
After wave circuit 131 is filtered, irregularity of wave form is less than 1%, and harmonic content is less than 1%.Wherein symmetrical push-pull amplifier circuit
Core component is triode.Because the maximum effective power of triode is 100W, the device power output for designing in the present invention
It is 200kW, therefore uses thousands of triode parallel shunts to realize high-power output.
Preferably, described device also includes AC-DC power subsystems 104, and it is used to provide power supply for system.
Preferably, described device also includes PD meter 105, its running status for being used to monitor described device subjects.
Preferably, described device also includes protection location 106, and it includes quick overcurrent protection 161 and pre- conjunction
Lock and zero-position protection device 162, it is quick overcurrent protection that the protection location 106 is used for according to current rectifying and wave filtering circuit 31
161 and it is pre- close a floodgate and input signal that zero-position protection device 162 is provided, using electronic analog swtich rupturing duty amplifying unit
Prime driving signal.During the overvoltage periodic test of power capacitor, the time is long, and electric current is big.To test item and people
The protection of member is particularly important.Because test item is the purely capacitive device of Large Copacity, abnormal increasing can be produced under traditional output short circuit protection
Big electric current, the damage to device is very big, it is necessary in the extremely short time internal cutting off source of trouble.The present apparatus employs electronic simulation and opens
Close, the prime driving signal of switch-off power amplifier section can be completed in nanoseconds, so that the output of rupturing duty.And
Increase fly-wheel diode between output end and dc source, a passage is increased to reverse current outflow.Preferably, the cycle
Control unit 102 uses Hall type numerical variable sensor collection voltages signal, and the voltage change ratio of sensor is microsecond
Rank, can accurately control the voltage change in boosting or pressure reduction, it is ensured that voltage will not rise and fall sharply and quickly.
Preferably, the remote operation unit 101 is additionally operable to the voltage waveform of real-time dynamic display output.Preferably, institute
Symmetrical push-pull amplifier circuit 132 is stated using being controlled according to control algolithm, frequency range, 0~99 of 25~300Hz can be realized
The output that individual cycle, 1~999 automatic cycle are circulated.
Preferably, described device can guarantee that the time of each cycle is 20ms by cycle control unit 102, and 1
Being boosted or be depressured in~3 cycles will not produce obvious overvoltage.
Fig. 2 is the method for the offer power capacitor overvoltage periodic test voltage waveform of specific embodiment of the invention
Flow chart.As shown in Fig. 2 methods described is since step 201.In step 201, in remote operation unit according to standard GB/T
11024.2-2001 sets the parameter of overvoltage periodic test waveform, and wherein voltage and time parameter is changing value, frequency and weight
Again number is fixed value；
In step 202, firing test device after the completion of parameter input, device meets standard GB/T detecting experimental condition
On the premise of the requirement of 11024.2-2001, cycle control unit is sampled to the voltage under current test pattern, is adopted
Sample voltage signal, and the sampled voltage signal is analyzed, the other voltage-regulation instruction of output Millisecond；
In step 203, the voltage-regulation that power amplification unit is based on step S202 is instructed, and test voltage is adjusted,
The voltage waveform and power output that output meets the electric parameter requirement export satisfactory voltage according to the parameter for setting
Waveform.
Preferably, the frequency for being set in the remote operation unit is 50Hz.
By above embodiments describing the present invention.However, it is known in those skilled in the art, as subsidiary
Patent right requirement limited, except the present invention other embodiments disclosed above equally fall in the scope of the present invention
It is interior.
Normally, all terms for using in the claims are all solved according to them in the usual implication of technical field
Release, unless clearly defined in addition wherein.All of reference " one/described/be somebody's turn to do【Device, component etc.】" all it is opened ground
At least one of described device, component etc. example is construed to, unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurate order, unless explicitly stated otherwise.
Claims (11)
1. it is a kind of provide power capacitor overvoltage periodic test voltage device, it is characterised in that described device includes：
Remote operation unit, for setting required experiment electric parameter under current test pattern；
Cycle control unit, samples to the voltage under current test pattern, obtains sampled voltage signal, and to the sampling
Voltage signal is analyzed, the other voltage-regulation instruction of output Millisecond；And
Power amplification unit, based on voltage-regulation instruction, is adjusted to test voltage, and output meets the electric parameter
It is required that voltage waveform and power output.
2. device according to claim 1, it is characterised in that described device also includes AC-DC power subsystems, its be used for for
System provides power supply.
3. device according to claim 1, it is characterised in that described device also includes PD meter, it is used to monitoring described
The running status of device experiment object.
4. device according to claim 1, it is characterised in that the power amplification unit includes symmetrical push-pull amplifier circuit
And current rectifying and wave filtering circuit, wherein, symmetrical push-pull amplifier circuit is used to realize power output that current rectifying and wave filtering circuit to be used for output
Voltage waveform carries out harmonic filtration.
5. device according to claim 4, it is characterised in that described device also includes protection location, the protection location
Including quick overcurrent protection and pre- combined floodgate and zero-position protection device, the protection location is used for according to power amplification list
The input signal that unit provides for quick overcurrent protection and pre- combined floodgate and zero-position protection device, using electronic analog swtich
The prime driving signal of rupturing duty amplifying unit, is exported with rupturing duty, and protection is test for capacitor and tester
Safety.
6. device according to claim 1, it is characterised in that the cycle control unit is passed using Hall type numerical variable
Sensor collection voltages signal, and the voltage change ratio of sensor is microsecond rank.
7. device according to claim 1, it is characterised in that it is defeated that the remote operation unit is additionally operable to real-time dynamic display
The voltage waveform for going out.
8. device according to claim 1, it is characterised in that the symmetrical push-pull amplifier circuit is pressed using high-speed computer
Control algolithm according to optimization is controlled, and can realize frequency range, 0~99 cycle, 1~999 automatic week of 25~300Hz
The output of phase circulation.
9. device according to claim 1, it is characterised in that described device can guarantee that each week by cycle control unit
The time of ripple is 20ms, and is boosted or be depressured in 1~3 cycle and will not produce obvious overvoltage.
10. it is a kind of provide power capacitor overvoltage periodic test voltage method, it is characterised in that methods described includes：
Step 1, the ginseng that overvoltage periodic test waveform is set in remote operation unit according to standard GB/T 11024.2-2001
Number, wherein voltage are changing value with time parameter, and frequency and number of repetition are fixed value；
Firing test device after the completion of step 2, parameter input, device meets standard GB/T detecting experimental condition
On the premise of the requirement of 11024.2-2001, cycle control unit is sampled to the voltage under current test pattern, is adopted
Sample voltage signal, and the sampled voltage signal is analyzed, the other voltage-regulation instruction of output Millisecond；
The voltage-regulation that step 3, power amplification unit are based on step 2 is instructed, and test voltage is adjusted, and output meets described
The voltage waveform and power output of electric parameter requirement export satisfactory voltage waveform according to the parameter for setting.
11. methods according to claim 10, it is characterised in that be in the frequency of remote operation unit setting
50Hz。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611199932.9A CN106771421A (en) | 2016-12-22 | 2016-12-22 | A kind of apparatus and method that power capacitor overvoltage periodic test voltage is provided |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611199932.9A CN106771421A (en) | 2016-12-22 | 2016-12-22 | A kind of apparatus and method that power capacitor overvoltage periodic test voltage is provided |
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|---|---|
| CN106771421A true CN106771421A (en) | 2017-05-31 |
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| CN201611199932.9A Pending CN106771421A (en) | 2016-12-22 | 2016-12-22 | A kind of apparatus and method that power capacitor overvoltage periodic test voltage is provided |
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