CN204832431U - High voltage DC tests integrated device - Google Patents
High voltage DC tests integrated device Download PDFInfo
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- CN204832431U CN204832431U CN201520586922.5U CN201520586922U CN204832431U CN 204832431 U CN204832431 U CN 204832431U CN 201520586922 U CN201520586922 U CN 201520586922U CN 204832431 U CN204832431 U CN 204832431U
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- 238000012360 testing method Methods 0.000 title claims abstract description 48
- 238000001914 filtration Methods 0.000 claims description 23
- 230000010354 integration Effects 0.000 claims description 19
- 238000009413 insulation Methods 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 2
- 230000033228 biological regulation Effects 0.000 description 9
- 238000005259 measurement Methods 0.000 description 6
- 229910044991 metal oxide Inorganic materials 0.000 description 5
- 150000004706 metal oxides Chemical class 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
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- 241000196324 Embryophyta Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
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- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Testing Relating To Insulation (AREA)
Abstract
The utility model relates to a high voltage DC tests integrated device, including letting in the commercial power and handle and the the control unit of output interflow signal, step up the rectification for high voltage direct current signal output's the unit that steps up with alternating current signal it, the control unit is with to step up unit integrated as an organic whole. The control unit includes rectifier circuit, a filter circuit, the wide power switch of pulse accent, inverter circuit, control circuit, preset circuit, negative feedback circuit, and preset circuit and negative feedback circuit are connected with control circuit respectively. The unit that steps up includes frequency converting circuit, intermediate frequency transformer, voltage doubler rectifier circuit, the 2nd filter circuit. The utility model discloses a high voltage DC tests integrated device with the control unit with step up the unit as an organic whole to for the high voltage DC experiment provides the support, it receives external disturbance less, and the security is higher.
Description
Technical field
The utility model relates to a kind of high direct voltage Test integration device for carrying out high direct voltage Insulation Test use to power equipment.
Background technology
Power equipment needs to carry out the Insulation Test under high direct voltage usually, as measured its DC characteristic parameter, withstand voltage level, leakage currents etc.; Some high-voltage testing equipments also need DC high voltage as power supply, and therefore high direct voltage proving installation is one of visual plant carrying out high-voltage test.Traditional high direct voltage proving installation is all made up of control section (Low-voltage Electronic components and parts form) and increasing apparatus (consisting of I.F.T. and silicon stack, capacitance voltage-multiplying rectification) two separate unit.The output cable socket of control section is connected by external private cable with the cable socket of increasing apparatus, and this cable does not have short circuit and open circuit, loose contact.Increasing apparatus is assembled with current-limiting resistance, microampere meter again, finally by Special test lead-in wire access tested device.Control section, increasing apparatus all should adopt Special grounding wire reliable ground to form test loop.For traditional high direct voltage proving installation, control section and increasing apparatus adopt split-type design, easily there is the faults such as outer layer insulation wearing and tearing, inner broken string, interface contact be bad in its tie cable, causes that potential safety hazard, output voltage accuracy are low even cannot export the problems such as high pressure.The leakage current of tested device is tested by external microampere meter, and the wiring of instrument directly will affect test loop, causes the error of test data even invalid.And package unit components and parts assembling loaded down with trivial details, wiring is complicated, very easily introduce space electric field interference, cause test data error, device antijamming capability and security poor.
Summary of the invention
The purpose of this utility model is to provide a kind ofly can carry out DC high potential test and by less, the antijamming capability of external action and the higher high direct voltage Test integration device of security.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of high direct voltage Test integration device, for carrying out the Insulation Test under high direct voltage to power equipment, it comprise pass into civil power and it is processed and the control module of output AC signal, by described AC signal boosting rectification be high-voltage dc signal export boosting unit, described control module and described boosting unit become one.
The output terminal of described boosting unit connects high-tension shielding cable and is connected with the power equipment described in tested.
Described control module and described boosting unit are integrated in the cabinet of horizontal-vertical double-purpose, and described cabinet has shielding construction and ground structure.
Described control module comprises input civil power and is rectified into the rectification circuit of direct current, described direct current is carried out to the first filtering circuit of filtering, the pulse width modulated power switch be connected with the first described filtering circuit, be connected with described pulse width modulated power switch and export the inverter circuit of described AC signal, the control circuit of the pulse width modulated power switch described in control, for the given circuit of given required high direct voltage, the negative-feedback circuit of the high-voltage dc signal described in negative feedback, described given circuit is connected with described control circuit respectively with described negative-feedback circuit.
Described rectification circuit is bridge rectifier circuit; Described filtering circuit comprises electrochemical capacitor; Described pulse width modulated power switch comprises MOS power tube.
The described control module high-voltage dc signal also comprised according to output carries out the protection circuit protected, and described protection circuit is connected with described control circuit.
Described boosting unit comprises frequency changer circuit, the I.F.T. be connected with described frequency changer circuit, the voltage doubling rectifing circuit be connected with described I.F.T., the second filtering circuit of being connected with described voltage doubling rectifing circuit.
Described voltage doubling rectifing circuit comprises high voltage silicon rectifier stack; The second described filtering circuit comprises high-voltage capacitance.
The output terminal of the second described filtering circuit is connected with current-limiting resistance.
Described high direct voltage Test integration device also comprises the meter mutually integrated with described boosting unit.
Because technique scheme is used, the utility model compared with prior art has following advantages: high direct voltage Test integration device of the present utility model by control module and boosting unit be integrated, thus for high direct voltage experiment provide support, its by external interference less, security is higher.
Accompanying drawing explanation
Accompanying drawing 1 is theory diagram of the present utility model.
Embodiment
Below in conjunction with embodiment, the utility model is further described.
Embodiment one: a kind of high direct voltage Test integration device for carrying out Insulation Test under high direct voltage (comprise and measure power equipment parameter or provide power supply for high-voltage testing equipment) to power equipment, comprise the control module and boosting unit that become one mutually, the two is integrated in the cabinet of the horizontal-vertical double-purpose of international type, and this cabinet has shielding construction and ground structure.Whole high potential assembly adopts foaming technique to be fixed in specific cabinet, and cabinet adopts shielding and reliable grounding measures, improves measuring accuracy, ensure that the safety of testing crew.
Control module is used for passing into civil power and processes and output AC signal it, and boosting unit is that high-voltage dc signal exports for rectification of AC signal being boosted.
Control module comprises input civil power and the pulse width modulated power switch that the rectification circuit being rectified into direct current, the first filtering circuit of direct current being carried out to filtering are connected with the first filtering circuit, to be connected with pulse width modulated power switch and the inverter circuit of output AC signal, gating pulse adjust the control circuit of wide power switch, be used for given needed for the given circuit of high direct voltage, the negative-feedback circuit of negative feedback high-voltage dc signal, given circuit is connected with control circuit respectively with negative-feedback circuit.Wherein rectification circuit is bridge rectifier circuit; Filtering circuit comprises electrochemical capacitor; Pulse width modulated power switch comprises MOS power tube, and inverter circuit is MOS bridge inverter main circuit, and given circuit can adopt toggle switch.Control module can also comprise and carries out according to the high-voltage dc signal exported the protection circuit protected, and protection circuit is connected with control circuit.In addition, control module can also arrange display screen, for showing the information of given high direct voltage information and the actual high-voltage dc signal exported.
Boosting unit comprises frequency changer circuit, the I.F.T. be connected with frequency changer circuit, the voltage doubling rectifing circuit be connected with I.F.T., the second filtering circuit of being connected with voltage doubling rectifing circuit.Wherein, voltage doubling rectifing circuit comprises high voltage silicon rectifier stack; Second filtering circuit comprises high-voltage capacitance.The output terminal of boosting unit, namely the output terminal of the second filtering circuit can connect high-tension shielding cable again and be connected with tested power equipment after a current-limiting resistance.High-tension shielding cable adopts silicon rubber insulation high-voltage shielding flexible cord, and its insulation against ground can tolerate the above high pressure of rated operational voltage, has good shielding properties, and anti-interference is good, directly can mop floor and be connected to tested device.
This high direct voltage Test integration device also comprises the meter mutually integrated with boosting unit, and comprise reometer part and voltage table part, the two is digital display type meter, is connected after the high-voltage dc signal of output can be passed through meter with protection circuit.
Above-mentioned I.F.T. adopts poured with epoxy resin, and frequency is high, and volume is little, significantly alleviator weight.High-voltage capacitance adopts polyethylene film material, and good insulation preformance, withstand voltage is high.High voltage silicon rectifier stack adopts the little single Series Package of silicon particle, effectively eliminates silicon stack surface and flows through the impact of leakage current on test result, good reliability.
The main circuit principle of this device is: pass into 220V civil power, through bridge rectifier circuit, interchange is become direct current; Again through the filtering of electrochemical capacitor, control MOS power tube is input to bridge inverter main circuit direct current, obtains AC signal.Direct current signal exports mid-frequency sinusoidal alternating current wave pressure and improves voltage to I.F.T. after frequency conversion, then exports high direct voltage through high voltage silicon rectifier stack voltage multiplying rectifier, simultaneously through the filtering of high-voltage capacitance, can obtain the DC voltage of stabilizer pole.The employing of this device meets the high resistance resistor of engineering test requirement, the measurement module of microampere order electric current composition carries out independent voltage measurement.
This device has following characteristics:
(1) this device adopts intermediate frequency voltage-multiplying circuit; application PWM pulse modulation technology and high-power IGBT device; voltage can from 0V adjusts; and it is theoretical according to Electro Magnetic Compatibility; adopt the measures such as special shielding, isolation and ground connection; make DC high potential test achieve high-quality, portable and improper flashover under rated voltage can be born, electric discharge and not damaging, there is high pressure overvoltage, high-pressure and overflowing protection, mains side overvoltage, overcurrent protection.
(2) this device adopts the large feedback of voltage, and therefore output voltage stabilization degree is greatly improved, and voltage drift amount is few.High pressure overvoltage is adjusted and is adopted digital dial switch, magnitude of voltage of adjusting intuitively can be shown, and have higher precision of adjusting.Set up high precision 0.75U
dC1mAfunction button, brings great convenience to metal oxide arrester measurement; Output voltage regulates and adopts single multiturn potentiometer, and degree of regulation is high, simple to operate.
The present invention is by integrated to control section, increasing apparatus, current-limiting resistance, meter meter, and without the need to by tie cable connection control part and increasing apparatus, and external component connects, and only High voltage output cable need be connected to tested device.After improvement like this, this device effectively can eliminate potential safety hazard because tie cable fault causes, output voltage accuracy is low even cannot export the problems such as high pressure, and loaded down with trivial details wiring causes space electric field to disturb the data error brought, whole test unit volume is little, lightweight, be convenient to site work.
The beneficial effect of this device is:
(1) adopt the large feedback of voltage, output voltage stabilization degree is high, ripple factor≤1%.The level and smooth pressure regulation of gamut, good degree of regulation≤0.5% of voltage-regulation fineness, degree of stability≤1%, voltage error ± 1%(reading ± 0.2kV), current error ± (1% ± 1 word).Boosted potential device stepping up from zero, and with voltage calibration instruction.0.75U
dC1mAfunction button, facilitates metal oxide arrester attribute testing, precision ± (1% reading ± 0.2kV).Overvoltage protection adopts dial-up setting, very clear, error ± 1%.
(2) High voltage output cable adopts screened cable, and high-tension shielding shields separate with ground, and its insulation against ground can tolerate the above high pressure of rated operational voltage, has good shielding interference free performance, and the application of ground shielding improves operational security.
(3) by integrated development, effectively can eliminate the potential safety hazard of loaded down with trivial details pair of connecting wires periphery charging zone, substantially increase job safety, and reduce its space electric field caused and disturb the data error brought, and by simplifying wiring thus reducing operating personnel, increase substantially productivity effect.
The use procedure of said apparatus is as follows:
(1) device should check its integrity before use.
(2) ground wire of protective ground line and working earthing line and resistor-type discharger all should receive separately (i.e. one point earth) on the earthing bar of tested device, forbids each ground wire mutually to be connected, should use DHV Special grounding wire for this reason.
(3) power switch is placed in scram position and checks that pressure regulation potentiometer should in zero-bit.Overvoltage protection setting valve is generally 1.1 times of trial voltage.
(4) whether the authenticated voltage protection of unloaded boosting adjusts sensitive.
(5) switch on power switch, now green light, represents that power supply is connected.
(6) by red button, then when red, represents that high pressure is connected.
(7) clockwise direction regulates pressure regulation potentiometer gently, and namely output terminal starts from scratch boosting, after rising to required operating voltage, and record current meter reading in required time, and check that control box and high-voltage output line are with or without abnormal occurrence and the sound.
(8) press yellow button, now voltage should be down to 75% of above-mentioned required trial voltage, verifies 0.75U with this
dC1mAwhether function is normal.
(9) step-down, after pressure regulation potentiometer back to zero, presses the green button immediately, cutoff high powered-down switch.
(10) leakage current and DC voltage withstand test are carried out to tested device.After carrying out check test confirmation measurement mechanism situation without exception, can start to carry out correlation test.Tested device, ground wire etc. are connected, check errorless rear i.e. opening power.
(11) required voltage or reference current is boosted to.The rate of rise is advisable with 3-5kV trial voltage per second.Standby current table charging current is also needed to be no more than the maximum operating currenbt of proving installation when boosting for bulky capacitor tested device.To small capacitances tested device, as metal oxide arrester, first rise to 90% of required voltage (electric current), more slowly carefully rise to required voltage (electric current), then from read-out voltage digital display meter (electric current) value.As 0.75U need be carried out to metal oxide arrester
dC1mAduring measurement, first rise to U
dC1mAmagnitude of voltage, then presses yellow button, and now namely voltage be down to original 75%, and keeps this state, now can read electric current.After measurement, pressure regulation potentiometer gets back to zero counterclockwise, presses the green button.By red button when need again boost.
(12) test complete, step-down, after pressure regulation potentiometer back to zero, presses the green button, powered-down.
(13) for small capacitances tested devices such as metal oxide arresters, general very fast by the pressure measurement conductive discharge time.And generally will treat that the self discharge of tested device voltage is to less than 20% of trial voltage for bulky capacitor tested devices such as cables, then discharged by supporting resistor-type discharger.After tested device fully discharges, hang up properly ground wire, just allow dismounting and the replacing wiring work of carrying out high-voltage connection.
(14) operation after protection act.In use as found, red light goes out, green light, voltage drop, is relevant protection act.Now answer powered-down switch, panel leds does not all work.Pressure regulation potentiometer is return zero-bit, and after one minute, standby interior secondary capacitor just allows again to turn on the power switch after fully discharging, and re-starts no-load test and can pressure build-up test again after finding out situation.
Instant invention overcomes prior art Problems existing, it is a kind of New Generation of Portable high direct voltage Test integration device combining on-the-spot reality and develop.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (10)
1. a high direct voltage Test integration device, for carrying out the Insulation Test under high direct voltage to power equipment, it is characterized in that: it comprise pass into civil power and it is processed and the control module of output AC signal, by described AC signal boosting rectification be high-voltage dc signal export boosting unit, described control module and described boosting unit become one.
2. high direct voltage Test integration device according to claim 1, is characterized in that: the output terminal of described boosting unit connects high-tension shielding cable and is connected with the power equipment described in tested.
3. high direct voltage Test integration device according to claim 1 and 2, is characterized in that: described control module and described boosting unit are integrated in the cabinet of horizontal-vertical double-purpose, and described cabinet has shielding construction and ground structure.
4. high direct voltage Test integration device according to claim 1, it is characterized in that: described control module comprises input civil power and is rectified into the rectification circuit of direct current, described direct current is carried out to the first filtering circuit of filtering, the pulse width modulated power switch be connected with the first described filtering circuit, be connected with described pulse width modulated power switch and export the inverter circuit of described AC signal, the control circuit of the pulse width modulated power switch described in control, for the given circuit of given required high direct voltage, the negative-feedback circuit of the high-voltage dc signal described in negative feedback, described given circuit is connected with described control circuit respectively with described negative-feedback circuit.
5. high direct voltage Test integration device according to claim 4, is characterized in that: described rectification circuit is bridge rectifier circuit; Described filtering circuit comprises electrochemical capacitor; Described pulse width modulated power switch comprises MOS power tube.
6. the high direct voltage Test integration device according to claim 4 or 5; it is characterized in that: the described control module high-voltage dc signal also comprised according to output carries out the protection circuit protected, and described protection circuit is connected with described control circuit.
7. high direct voltage Test integration device according to claim 1, is characterized in that: described boosting unit comprises frequency changer circuit, the I.F.T. be connected with described frequency changer circuit, the voltage doubling rectifing circuit be connected with described I.F.T., the second filtering circuit of being connected with described voltage doubling rectifing circuit.
8. high direct voltage Test integration device according to claim 7, is characterized in that: described voltage doubling rectifing circuit comprises high voltage silicon rectifier stack; The second described filtering circuit comprises high-voltage capacitance.
9. the high direct voltage Test integration device according to claim 7 or 8, is characterized in that: the output terminal of the second described filtering circuit is connected with current-limiting resistance.
10. high direct voltage Test integration device according to claim 1, is characterized in that: it also comprises the meter mutually integrated with described boosting unit.
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| CN201520586922.5U CN204832431U (en) | 2015-08-06 | 2015-08-06 | High voltage DC tests integrated device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954670A (en) * | 2016-05-26 | 2016-09-21 | 工业和信息化部电子第五研究所 | ESD failure early warning circuit of integrated circuit |
| CN106405170A (en) * | 2016-08-30 | 2017-02-15 | 西安华谱电力设备制造有限公司 | Integrated high frequency and high voltage power source |
| CN106526439A (en) * | 2016-12-19 | 2017-03-22 | 丞俪仪器科技（上海）有限公司 | Adjustable high-voltage pulse type battery pole plate insulating property detecting system |
| CN108258922A (en) * | 2018-03-30 | 2018-07-06 | 国网安徽省电力公司电力科学研究院 | A kind of two-stage pressure-regulating controller of ultra-high-voltage DC generator |
| CN108387791A (en) * | 2017-09-28 | 2018-08-10 | 苏州华电电气股份有限公司 | A kind of dialing high-tension measurement linked protector |
| CN110389245A (en) * | 2018-04-19 | 2019-10-29 | 济南山开电力设备有限公司 | A kind of Intelligent type DC high voltage generator all-in-one machine |
| CN111025221A (en) * | 2019-12-24 | 2020-04-17 | 国网江苏省电力有限公司电力科学研究院 | Integrated extra-high voltage direct current transformer calibration device |
| CN113163241A (en) * | 2020-01-22 | 2021-07-23 | 海信视像科技股份有限公司 | Display device |
-
2015
- 2015-08-06 CN CN201520586922.5U patent/CN204832431U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954670A (en) * | 2016-05-26 | 2016-09-21 | 工业和信息化部电子第五研究所 | ESD failure early warning circuit of integrated circuit |
| CN105954670B (en) * | 2016-05-26 | 2019-06-07 | 工业和信息化部电子第五研究所 | Integrated circuit ESD early warning failure circuit |
| US10598713B2 (en) | 2016-05-26 | 2020-03-24 | Fifth Electronics Research Institute Of Ministry Of Industry And Information Technology | ESD failure early warning circuit for integrated circuit |
| CN106405170A (en) * | 2016-08-30 | 2017-02-15 | 西安华谱电力设备制造有限公司 | Integrated high frequency and high voltage power source |
| CN106405170B (en) * | 2016-08-30 | 2019-09-10 | 西安华谱电力设备制造有限公司 | A kind of integral type high-frequency and high-voltage power supply |
| CN106526439A (en) * | 2016-12-19 | 2017-03-22 | 丞俪仪器科技（上海）有限公司 | Adjustable high-voltage pulse type battery pole plate insulating property detecting system |
| CN106526439B (en) * | 2016-12-19 | 2023-11-10 | 丞俪仪器科技（上海）有限公司 | Adjustable high-voltage pulse type battery polar plate insulating property detection system |
| CN108387791A (en) * | 2017-09-28 | 2018-08-10 | 苏州华电电气股份有限公司 | A kind of dialing high-tension measurement linked protector |
| CN108258922A (en) * | 2018-03-30 | 2018-07-06 | 国网安徽省电力公司电力科学研究院 | A kind of two-stage pressure-regulating controller of ultra-high-voltage DC generator |
| CN110389245A (en) * | 2018-04-19 | 2019-10-29 | 济南山开电力设备有限公司 | A kind of Intelligent type DC high voltage generator all-in-one machine |
| CN111025221A (en) * | 2019-12-24 | 2020-04-17 | 国网江苏省电力有限公司电力科学研究院 | Integrated extra-high voltage direct current transformer calibration device |
| CN113163241A (en) * | 2020-01-22 | 2021-07-23 | 海信视像科技股份有限公司 | Display device |
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