CN106646172A - Test circuit for generating direct-current superimposed impulse voltage - Google Patents
Test circuit for generating direct-current superimposed impulse voltage Download PDFInfo
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- CN106646172A CN106646172A CN201611095475.9A CN201611095475A CN106646172A CN 106646172 A CN106646172 A CN 106646172A CN 201611095475 A CN201611095475 A CN 201611095475A CN 106646172 A CN106646172 A CN 106646172A
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- voltage
- voltage generator
- test
- impulse voltage
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention discloses a test circuit for generating direct-current superimposed impulse voltage. The test circuit includes a second resistor, an impulse voltage generator and a direct-current generator; the second resistor is connected in series with a test product, so that a test loop can be formed; and the impulse voltage generator is connected in parallel with a modulation circuit used for adjusting attenuation shock waves. The test circuit can provide circuit hardware support for capacitor insulation performance testing.
Description
Technical field
The present invention relates to power equipment performance study field, and in particular to impacting capacitor in DC stacked surge voltage
Under a kind of hookup of the DC stacked surge voltage of generation studied of state of insulation.
Background technology
Extra-high voltage direct-current transmission technology is progressively applied extensive all the more, extra-high in China's extra-high voltage grid is built
Pressure direct current transportation is mainly used in remote, the middle bulk power transmission engineering supported without drop point, no-voltage.Extra-high voltage direct-current transmission
Equipment mainly includes：Converter valve, converter power transformer, smoothing reactor, alternating current filter etc..Relative to traditional high-voltage dc transmission
Electricity, the DC voltage of extra-high voltage direct-current transmission is higher.Capacity is bigger, therefore to converter valve, converter power transformer, DC filter
Put forward higher requirement with the equipment such as arrester.
In actual motion, high-voltage convertor station pole neutral bus internal overvoltage centering bus equipment can produce serious danger
Evil.Wherein, composite voltage is impact electricity the most it will be evident that the most in a practical situation to the infringement for impacting capacitor in direct current transportation
The insulating properties of container are gradually reduced under DC stacked Impulse Voltage, so that there is the failures such as capacitor breakdown.
In order to evaluate state of insulation of the impacting electric capacity device under DC stacked surge voltage, need to build DC stacked impact
Voltage test circuit, but the type circuit is not directed in prior art.
The content of the invention
The present invention provides a kind of hookup for producing DC stacked surge voltage to solve above-mentioned technical problem.
The present invention is achieved through the following technical solutions：
A kind of hookup for producing DC stacked surge voltage, including for test article test loop in series
Second resistance, impulse voltage generator and DC voltage generator, DC voltage generator generation galvanic current pressure, second
Resistance plays metering function, and the electric current after preventing test article breakdown is excessive, it is ensured that experimental safe；On impulse voltage generator simultaneously
The modulation circuit for adjusting decay Sasser is associated with, modulation circuit constitutes modulator loop with impulse voltage generator.Whole dress
Loaded in series is put in test article, after normal circuit operation, the DC voltage that DC voltage generator is produced is superimposed with impact electricity
The attenuation oscillasion impulse that pressure generator is produced after modulator loop modulation carries out applied voltage test to test article.This circuit can be produced directly
The composite voltage of stream superposition impact, is consistent with the actual condition of test article, can be used for test article in DC stacked surge voltage
Under state of insulation studied.In process of the test, DC voltage is applied to survey by impulse voltage generator, second resistance
Test product two ends；Surge voltage is then applied to test article two ends by DC voltage generator and second resistance, forms complex conditions
Under capacitive insulation performance test loop；Voltage magnitude is continued to increase, once reach the breakdown voltage amplitude of test article, test article
To puncture, and second resistance can when test article punctures by current control in safe range, can be right using the circuit
The state of insulation of test article is studied.
Preferably, the modulation circuit includes first resistor and the inductance being in series.Using first resistor and inductance
Modulation circuit in series, its two ends are connected on impulse voltage generator and together constitute with modulation with impulse voltage generator
Loop, the loop is order Oscillating circuit.Can be changed by the resistance value of the inductance value and modulated resistance that adjust modulation inductance
The frequency of oscillation of produced Sasser and die-away time, the peak value of the wave of oscillation produces voltage and determines by impulse voltage generator.
Preferably, the signal end of the signal end of the impulse voltage generator and DC voltage generator is both connected to work
On control machine, the working condition of DC voltage generator and impulse voltage generator is controlled using industrial computer, realizes test
Start and stop.
The present invention compared with prior art, has the following advantages and advantages：
The present invention produces DC voltage and is superimposed with impulse voltage generator through modulator loop using DC voltage generator
Attenuation oscillasion impulse is produced after modulation carries out applied voltage test to test article, provides circuit hardware for capacitive insulation performance test and supports.
Description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is DC stacked impulse voltage test circuit diagram of the invention.
Fig. 2 is the equivalent circuit of Fig. 1.
Fig. 3 is that test product voltage and impulse voltage generator produce waveform comparison figure when hookup of the present invention is emulated, wherein,
Solid line represents test product voltage, and dotted line represents surge voltage, and unit is 104V。
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
A kind of hookup for producing DC stacked surge voltage as shown in Figure 1, including in series with test article
Second resistance R2 of test loop, impulse voltage generator and DC voltage generator, are parallel with impulse voltage generator
For adjusting the modulation circuit of decay Sasser.
Embodiment 2
The present embodiment is refined on the basis of above-described embodiment to the particular of circuit, for example, as shown in figure 1,
Modulation circuit includes first resistor R1 and the inductance L being in series.
For the ease of being controlled to the working condition of impulse voltage generator and DC voltage generator, surge voltage is sent out
The raw signal end of device and the signal end of DC voltage generator are both connected on industrial computer.Sent out using industrial computer control surge voltage
The start and stop of raw device and DC voltage generator, it is real in order to operate and remote control to reach the control purpose to whole circuit
Existing intellectuality.
First resistor R1 and inductance L of the present embodiment plays modulating action, that defines declining for surge voltage waveform
Subtract time and frequency of oscillation, after the die-away time of known decay Sasser and frequency its parameter is can determine.Concrete grammar is such as
Under：
According to underdamping convergent response formula U (t)=(ω that second-order circuit is produced0/ωd)·U0e-αtcos(ωdT- β),
Attenuation coefficient is e-αt, generally decay Sasser decays to stable state through 3 τ～5 τ, if taking die-away time t0 for 4 τ, basis
In convergent response formula：α=1/ τ=4/t0=R1/ 2L, it may be determined that go out
Method is verified to be determined to above-mentioned parameter with real data, if capacitance C1 is 40 μ F, die-away time is 0.1s,
Cycle of oscillation is 0.01s, then can obtain corresponding inductance, resistance value L=63.1mH, R1=5 Ω.
Foregoing circuit correctness can be verified by following examples：Test product electric capacity C2 is taken for 120pF, the direct current of employing
The model of pressure generator：PXZGF-60KV/2mA or GDZG-300, DC voltage takes 2kV.Impulse voltage generator is adopted
GDCY-20kV, surge voltage amplitude takes 20kV, and its equivalent capacitance C1 is 40 μ F, and damping resistance R1 is 5 Ω.Fig. 1 is the invention
Side circuit connected mode, Fig. 2 is the invention equivalent circuit, and Fig. 3 is that test product voltage and surge voltage are sent out under above-mentioned simulated conditions
Raw device produces the waveform comparison of voltage, it can be seen that is superimposed damped oscillation surge voltage by DC voltage, realizes in test product
The purpose of DC stacked surge voltage is produced on electric capacity.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the specific embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (3)
1. a kind of hookup for producing DC stacked surge voltage, it is characterised in that：Including in series with test article
The second resistance of test loop, impulse voltage generator and DC voltage generator, are parallel with the impulse voltage generator
For adjusting the modulation circuit of decay Sasser.
2. a kind of hookup for producing DC stacked surge voltage according to claim 1, it is characterised in that：The tune
Circuit processed includes first resistor and the inductance being in series.
3. a kind of hookup for producing DC stacked surge voltage according to claim 1, it is characterised in that：The punching
The signal end of the signal end and DC voltage generator that hit voltage generator is both connected on industrial computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611095475.9A CN106646172B (en) | 2016-12-02 | 2016-12-02 | Test circuit for generating direct current superposition impulse voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611095475.9A CN106646172B (en) | 2016-12-02 | 2016-12-02 | Test circuit for generating direct current superposition impulse voltage |
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| Publication Number | Publication Date |
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| CN106646172A true CN106646172A (en) | 2017-05-10 |
| CN106646172B CN106646172B (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611095475.9A Active CN106646172B (en) | 2016-12-02 | 2016-12-02 | Test circuit for generating direct current superposition impulse voltage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203924A (en) * | 2021-04-29 | 2021-08-03 | 国网四川省电力公司电力科学研究院 | Capacitor impact aging degree prediction method based on partial discharge detection |
Citations (7)
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| JP2003021572A (en) * | 2001-07-09 | 2003-01-24 | Nsk Ltd | Shock testing apparatus for roller bearing |
| CN101271140A (en) * | 2008-04-30 | 2008-09-24 | 中国电力科学研究院 | Extra-high voltage electric transmission and transformation experiment hall |
| CN101988933A (en) * | 2010-10-29 | 2011-03-23 | 国网电力科学研究院 | High-voltage high-capacity impulse voltage generator |
| CN102135595A (en) * | 2011-02-22 | 2011-07-27 | 南方电网科学研究院有限责任公司 | Device for direct-current and impulse superposition voltage test in high-altitude region |
| CN201993437U (en) * | 2010-12-01 | 2011-09-28 | 中国电力科学研究院 | Aperiodic trigger test device of direct current (DC) converter valve based on resistance-capacitance device |
| US20140292382A1 (en) * | 2011-12-20 | 2014-10-02 | Toshiba Mitsubishi-Electric Industrial Systems Corp. | Impulse voltage generation device |
| CN206209061U (en) * | 2016-12-02 | 2017-05-31 | 国网四川省电力公司电力科学研究院 | A kind of hookup of the DC stacked surge voltage of generation |
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2016
- 2016-12-02 CN CN201611095475.9A patent/CN106646172B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003021572A (en) * | 2001-07-09 | 2003-01-24 | Nsk Ltd | Shock testing apparatus for roller bearing |
| CN101271140A (en) * | 2008-04-30 | 2008-09-24 | 中国电力科学研究院 | Extra-high voltage electric transmission and transformation experiment hall |
| CN101988933A (en) * | 2010-10-29 | 2011-03-23 | 国网电力科学研究院 | High-voltage high-capacity impulse voltage generator |
| CN201993437U (en) * | 2010-12-01 | 2011-09-28 | 中国电力科学研究院 | Aperiodic trigger test device of direct current (DC) converter valve based on resistance-capacitance device |
| CN102135595A (en) * | 2011-02-22 | 2011-07-27 | 南方电网科学研究院有限责任公司 | Device for direct-current and impulse superposition voltage test in high-altitude region |
| US20140292382A1 (en) * | 2011-12-20 | 2014-10-02 | Toshiba Mitsubishi-Electric Industrial Systems Corp. | Impulse voltage generation device |
| CN206209061U (en) * | 2016-12-02 | 2017-05-31 | 国网四川省电力公司电力科学研究院 | A kind of hookup of the DC stacked surge voltage of generation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113203924A (en) * | 2021-04-29 | 2021-08-03 | 国网四川省电力公司电力科学研究院 | Capacitor impact aging degree prediction method based on partial discharge detection |
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| CN106646172B (en) | 2020-09-01 |
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