CN102426327A - Special withstand voltage test device and test method for power capacitor - Google Patents
Special withstand voltage test device and test method for power capacitor Download PDFInfo
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- CN102426327A CN102426327A CN2011103097749A CN201110309774A CN102426327A CN 102426327 A CN102426327 A CN 102426327A CN 2011103097749 A CN2011103097749 A CN 2011103097749A CN 201110309774 A CN201110309774 A CN 201110309774A CN 102426327 A CN102426327 A CN 102426327A
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- 238000012360 testing method Methods 0.000 title claims abstract description 58
- 239000003990 capacitor Substances 0.000 title claims abstract description 35
- 238000010998 test method Methods 0.000 title claims abstract description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 14
- 239000010703 silicon Substances 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 abstract description 2
- 230000001960 triggered effect Effects 0.000 abstract 1
- 230000002045 lasting effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses a special withstand voltage test device and a test method for a power capacitor, which consists of a power supply, a voltage regulator, a transformer and a series-parallel resonant circuit which is arranged on the other side of the transformer and corresponds to the voltage regulator, wherein the series-parallel resonant circuit consists of a series compensation reactor which is connected with a test capacitor in series, a parallel compensation reactor which is connected with the test capacitor in parallel, a wave regulating resistor which is connected in series in the circuit, a silicon controlled trigger control device which is connected with the wave regulating resistor, a high-voltage divider which is connected with the two poles of the test capacitor and a digital storage oscilloscope, and the series-parallel resonant circuit is grounded. The test method of the invention has the beneficial effects that: (1) the problem that a common voltage regulator is slow in boosting speed is solved by a method of instantly changing resonance parameters to generate high voltage, (2) the time of enduring the high voltage on a test article can be accurately controlled by controlling the conduction time of a silicon controlled rectifier, and (3) the test voltage is accurately controlled and an oscilloscope can be synchronously triggered to acquire test waveforms.
Description
Technical field
The present invention relates to power capacitor, specifically is special Withstand test device of a kind of power capacitor and test method.
Background technology
In all electrical equipments, the insulation work field intensity of power capacitor is the highest.In the power transmission and transformation industry, generally generally adopt the The parallel power condenser group for the energy loss of exerting oneself with idle conversion, reduction electric system that alleviates generator and transformer; For the ability to transmit electricity that increases power transmission line generally adopts the series compensation capacitor group.Need because string is mended the special running environment of device, series capacitor compensation has been proposed the requirement of special test project, one of them applies 1.35 at the test product interpolar exactly
U LimPower-frequency voltage, lasting tolerance time 300ms～500ms.The characteristics of this pilot project are: trial voltage is high, and pressure rising time is short.If adopt the step-up method of conventional Motor Control pressure regulator coil, its rate of rise is generally 200V/s～500V/s, begins to be raised to 1.35 to voltage from combined floodgate
U LimSurpass the lasting tolerance time of testing requirements required pressure rising time possibly, and lasting tolerance time can't accurately be controlled.This method is the actual withstand voltage level that is difficult to reach testing requirements and reflect test product truly.In order successfully to carry out this special test; Key is to solve the rate of rise and lasting tolerance time is precisely controlled, and the key of problem that solves this project is to design rational, workable test circuit and make corresponding test method.
Summary of the invention
First purpose of the present invention is the device that the special withstand voltage test of a kind of power capacitor will be provided.
Second purpose of the present invention is the method that the special withstand voltage test of a kind of power capacitor will be provided.
Power capacitor Withstand test device of the present invention; By power supply, pressure regulator, transformer be arranged on the transformer another side series parallel resonance loop corresponding and form with pressure regulator; The series parallel resonance loop by with the series compensation reactor of test capacitances in series, with the shunt compensation reactor of test electric capacity parallel connection, be connected on wave regulating resistor, the controllable silicon triggering control device that is connected with wave regulating resistor in the loop and be connected high-voltage bleeder, the digital storage oscilloscope of testing electric capacity the two poles of the earth and form series parallel resonance loop ground connection.
This device changes the parameter in the circuit by access or the excision that controllable silicon triggers the wave regulating resistor in the control device control circuit; Make circuit produce resonance; Produce high voltage at test electric capacity two ends, but the electric current that flows through series compensation reactor can not surpass the maximum output current of testing transformer.Voltage on this test unit capacitor can reach 1.35U
Lim
The method of the special withstand voltage test of power capacitor of the present invention comprises the steps:
(1) a special Withstand test device of power capacitor is set;
(2) test capacitor is connected in parallel on the parallel branch of the series and parallel resonant tank in the special Withstand test device of power capacitor;
(3) regulate the time that the superpotential control device triggers the controllable silicon conducting;
(4) test product is applied 0.5U earlier
NVoltage;
(5) pressurization applies the superpotential of a series and parallel resonance in 5 minutes, continues 300 ms～500ms;
(6) multiple of calculating superpotential and first-harmonic relation is utilized 1.35U
LimVoltage can be confirmed to satisfy 1.35U divided by superpotential multiple
LimSuperpotential the time the fundamental frequency voltage U
E
(7) test product is directly applied power-frequency voltage U
E, through triggering the controllable silicon ON time, can produce series and parallel resonance, and continue the superpotential of 300 ms～500ms;
(8) every bench teat article carry out 3 times.
The beneficial effect of test method of the present invention is: (1) produces high-tension method through moment change resonant parameter and solves the slower problem of the common pressure regulator rate of rise, the anti-electric requirement of avoiding test product before tolerating high voltage, to tolerate for a long time inferior high voltage and made the test product puncture or do not reach reality.(2) control controllable silicon ON time can accurately be controlled the time of tolerating high voltage on the test product, slow problem of the reaction time of avoiding manual control machine tool boosting mode to bring.(3) trial voltage control is accurate, and can synchronous triggering oscillograph acquisition test waveform.
Description of drawings
Fig. 1 is series parallel resonance test circuit figure of the present invention.
Embodiment
The special Withstand test device of power capacitor of the present invention; Trigger control device SCR, digital storage oscilloscope G and be connected the high-voltage bleeder that capacitor C 1, capacitor C 2, capacitor C 3, the capacitor C 4 at test capacitor Cx the two poles of the earth form by power supply, pressure regulator T1, transformer T2, series compensation reactor L1, shunt compensation reactor L2, wave regulating resistor R, controllable silicon and form; Power supply is connected with pressure regulator T1; Series compensation reactor L1 connects with test capacitor Cx, and shunt compensation reactor L2 is parallelly connected with test capacitor Cx; Digital storage oscilloscope G and digital voltmeter are through the voltage at high-voltage bleeder low-voltage arm experiment with measuring capacitor Cx the two poles of the earth; Resistance R is connected in the series and parallel resonant tank; Access and excision by SCR control device SCR controlling resistance R; Constitute thyristor controlled series and parallel resonant circuit, be used for changing the resonant parameter of circuit, the change of resonant parameter produces high pressure at test product capacitor Cx two ends.
The method of application step of this device is:
(1) test capacitor Cx is connected in parallel on the parallel branch of series and parallel resonant tank;
(2) regulate the time that the superpotential control device triggers the controllable silicon conducting;
(3) test product is applied 0.5U earlier
NVoltage;
(4) pressurization applies the superpotential of a series and parallel resonance in 5 minutes, continues 300 ms～500ms;
(5) multiple of calculating superpotential and first-harmonic relation is utilized 1.35U
LimVoltage can be confirmed to satisfy 1.35U divided by superpotential multiple
LimSuperpotential the time the fundamental frequency voltage U
E
(6) test product is directly applied power-frequency voltage U
E, through triggering the controllable silicon ON time, can produce series and parallel resonance, and continue the superpotential of 300 ms～500ms;
The foregoing description is merely concrete example to the object of the invention, technical scheme and beneficial effect further explain, and the present invention is defined in this.All any modifications of within scope of disclosure of the present invention, being made, be equal to replacement, improvement etc., all be included within protection scope of the present invention.
Claims (4)
1. power capacitor Withstand test device; It is characterized in that: by power supply, pressure regulator, transformer be arranged on the transformer another side series parallel resonance loop corresponding and form with pressure regulator; The series parallel resonance loop by with the series compensation reactor of test capacitances in series, with the shunt compensation reactor of test electric capacity parallel connection, be connected on wave regulating resistor, the controllable silicon triggering control device that is connected with wave regulating resistor in the loop and be connected high-voltage bleeder, the digital storage oscilloscope of testing electric capacity the two poles of the earth and form series parallel resonance loop ground connection.
2. the special withstand voltage test method of power capacitor is characterized in that: comprise the steps:
(1) a special Withstand test device of power capacitor is set;
(2) test capacitor is connected in parallel on the parallel branch of the series and parallel resonant tank in the special Withstand test device of power capacitor;
(3) regulate the time that the superpotential control device triggers the controllable silicon conducting;
(4) test product is applied 0.5U earlier
NVoltage;
(5) pressurization applies the superpotential of a series and parallel resonance in 5 minutes, continues 300 ms～500ms;
(6) multiple of calculating superpotential and first-harmonic relation is utilized 1.35U
LimVoltage can be confirmed to satisfy 1.35U divided by superpotential multiple
LimSuperpotential the time the fundamental frequency voltage U
E
(7) test product is directly applied power-frequency voltage U
E, through triggering the controllable silicon ON time, can produce series and parallel resonance, and continue the superpotential of 300 ms～500ms;
(8) every bench teat article carry out 3 times.
3. test unit according to claim 1 and 2 and test method is characterized in that: adopt the access of resistance in the SCR control device control loop and the numerical value of excision and access, thereby the series and parallel resonant parameter is changed and the voltage 1.35U of acquisition test
Lim
4. test unit according to claim 1 and 2 and test method is characterized in that: the withstand voltage test time is controlled by changing the controllable silicon ON time, and the withstand voltage deviation can be regulated through wave regulating resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103097749A CN102426327A (en) | 2011-10-13 | 2011-10-13 | Special withstand voltage test device and test method for power capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103097749A CN102426327A (en) | 2011-10-13 | 2011-10-13 | Special withstand voltage test device and test method for power capacitor |
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| CN102426327A true CN102426327A (en) | 2012-04-25 |
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| CN2011103097749A Pending CN102426327A (en) | 2011-10-13 | 2011-10-13 | Special withstand voltage test device and test method for power capacitor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558537A (en) * | 2013-11-01 | 2014-02-05 | 国家电网公司 | Circuit for testing overload tolerance capacity of series capacitor and working method of circuit |
| CN104166082A (en) * | 2014-08-15 | 2014-11-26 | 上海思源电力电容器有限公司 | Capacitor repeat overvoltage test device |
| CN106153989A (en) * | 2016-07-26 | 2016-11-23 | 桂林电力电容器有限责任公司 | A kind of charged wire-changing device and How It Works |
| CN106771911A (en) * | 2016-12-09 | 2017-05-31 | 广西电友科技发展有限公司 | A kind of elementary errors compensation industrial frequency withstand voltage experimental rig in parallel |
| CN107688140A (en) * | 2017-10-10 | 2018-02-13 | 铜陵市华科光电科技有限公司 | A kind of capacitor repeats overvoltage experimental rig |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125833U (en) * | 1992-07-18 | 1992-12-23 | 能源部电力科学研究院 | Withstand valtage testing device |
| CN102175956A (en) * | 2011-02-17 | 2011-09-07 | 甘肃电力科学研究院 | Long duration induced voltage withstand test device of ultrahigh-voltage transformer |
| CN202281820U (en) * | 2011-10-13 | 2012-06-20 | 桂林电力电容器有限责任公司 | Special withstand voltage test device of power capacitor |
-
2011
- 2011-10-13 CN CN2011103097749A patent/CN102426327A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2125833U (en) * | 1992-07-18 | 1992-12-23 | 能源部电力科学研究院 | Withstand valtage testing device |
| CN102175956A (en) * | 2011-02-17 | 2011-09-07 | 甘肃电力科学研究院 | Long duration induced voltage withstand test device of ultrahigh-voltage transformer |
| CN202281820U (en) * | 2011-10-13 | 2012-06-20 | 桂林电力电容器有限责任公司 | Special withstand voltage test device of power capacitor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558537A (en) * | 2013-11-01 | 2014-02-05 | 国家电网公司 | Circuit for testing overload tolerance capacity of series capacitor and working method of circuit |
| CN103558537B (en) * | 2013-11-01 | 2015-12-30 | 国家电网公司 | The circuit of test series capacitor tolerance capability of overload and method of work thereof |
| CN104166082A (en) * | 2014-08-15 | 2014-11-26 | 上海思源电力电容器有限公司 | Capacitor repeat overvoltage test device |
| CN106153989A (en) * | 2016-07-26 | 2016-11-23 | 桂林电力电容器有限责任公司 | A kind of charged wire-changing device and How It Works |
| CN106153989B (en) * | 2016-07-26 | 2022-12-06 | 桂林电力电容器有限责任公司 | Live line changing device and operation method |
| CN106771911A (en) * | 2016-12-09 | 2017-05-31 | 广西电友科技发展有限公司 | A kind of elementary errors compensation industrial frequency withstand voltage experimental rig in parallel |
| CN107688140A (en) * | 2017-10-10 | 2018-02-13 | 铜陵市华科光电科技有限公司 | A kind of capacitor repeats overvoltage experimental rig |
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Application publication date: 20120425 |