CN202940748U - High-voltage large-current impulse current generator - Google Patents
High-voltage large-current impulse current generator Download PDFInfo
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- CN202940748U CN202940748U CN201220348044XU CN201220348044U CN202940748U CN 202940748 U CN202940748 U CN 202940748U CN 201220348044X U CN201220348044X U CN 201220348044XU CN 201220348044 U CN201220348044 U CN 201220348044U CN 202940748 U CN202940748 U CN 202940748U
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- 239000003990 capacitor Substances 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 241000272165 Charadriidae Species 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000011160 research Methods 0.000 abstract description 7
- 238000011156 evaluation Methods 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
The utility model discloses a high-voltage large-current impulse current generator, which comprises four impulse current generators symmetrically arranged in a distribution manner, a charging circuit and four discharging circuits, wherein the four impulse current generators are charged simultaneously and discharged synchronously. Each single impulse current generator generates impulse current with an amplitude value of 25kA, and the four impulse current generators overlay on a grounding device sample to generate standard lightning current wave impulse current with an amplitude value reaching 100kA. The symmetrical arrangement of the impulse current generators in the distribution manner can effectively reduce the inductance of the discharging circuits, thereby facilitating to modulate impulse current with various waveforms meeting requirements of grounding impulse characteristic experimental research and performance evaluation. The spatial positions of the four impulse current generators are different, but the relative time difference among triggering signals of different impulse current generators is at a 0.1 mus level through triggering and turning on the four impulse current generators synchronously, thereby having little influence on the waveform of the total impulse current after overlaying.
Description
Technical field
The utility model belongs to the high-voltage test techniques field, relates in particular to a kind of heavy impulse current generator.
Background technology
For fear of Harm of lightning, the thunder resisting equipments such as lightning rod, lightning conducter and lightning arrester must be equipped with corresponding earthing device in order to lightning current is imported the earth.The ground connection impact characteristics mainly refers to the variation that impulse grounding impedance, impact coefficient and earth potential that lightning current presents during large ground diffusing towards periphery by earthing device rise.When transmission line of lightning strike lightning conducter or shaft tower tower top, lightning current flows into the earth through shaft tower, earthing device, and the tower top potential rise causes the insulator string counterattack, causes that even line tripping has a power failure.When the lightning current intrusion is sent out, transformer station, and when leaking into the earth by lightning rod, lightning conducter and lightning arrester, the lightning current of high amplitude will produce larger earth potential liter, thereby injure station equipment and operations staff's safety, also might cause the misoperation of the electrical secondary system that is connected with earth mat even to strike back, thereby cause large area blackout.Therefore, good earthing device impact property is the important prerequisite that guarantees power system security reliability service and high-rise person device security.
The applicant finds under study for action, the impulse earthed resistance that earthing device presents under acting under lightning current is relevant with factors such as soil resistivity, lightning current waveform and amplitude, earthing device size and structures, and under the lightning current effect of earth electrode time before high amplitude, shortwave, obvious spark effect and inductive effect will appear, thereby cause transient process very complicated, therefore, usually carried out certain hypothesis in the simulation modeling of earthing device impact characteristics and analog computation, thereby the result of calculation of causing and actual conditions have certain deviation.The experimental study of carrying out the ground connection impact characteristics is the most reliable method that truly reflects the earthing device impulse response, and the impulse current generator of wherein simulating lightning current is the key equipment of research experiment.But the impulse current generator that is used at present the research of earthing device transient characterisitics both at home and abroad is subjected to the restriction of the factors such as device fabrication level, test loop impedance, accessible impulse current peak value is only in the 40kA left and right, the lightning current peak value that this value arrives much smaller than actual monitoring, therefore also can't obtain effective test data to the response of earthing device under peak value lightning current effect more, can only obtain impact characteristics under the low peak impulse current deduce and derive impact characteristics under peak value impulse current more at present, the validity of this method remains verification experimental verification.Therefore, develop more voltage levels, more the impulse current generator of peak value is the important prerequisite condition that the ground connection impact characteristics is furtherd investigate.
Chinese patent literature disclosed " Cascade-type high voltage impulse current generator " (application number 200820190619.3) is used for impulse current generator with the theory in the surge voltage loop of MARX, successfully realize the discharge of electric capacity plural serial stage, solved the problem that improves the output voltage of impulse current generator.Adopt the pattern of symmetric charge on structure, reduce the voltage that main insulation is born in charging process, thereby reduced size and the floor space of device, adopt simultaneously the method for compact design to reduce loop inductance as far as possible.Therefore, this device has the advantages such as series connection progression is many, and charged electrical forces down, and discharge voltage is high, and is simple in structure, and volume and floor space are little.The subjects of this utility model is the valve block of lightning arrester, mainly it is carried out whole discharge capacity test, its technical parameter biases toward the higher voltage of output and certain impulse current, the body inductance of synchronizer increases along with the increase of series connection progression, therefore, with the restricted application of this utility model, also need further reduce loop inductance and improve the impulse current peak value if will use it for the research of ground connection impact characteristics.
Chinese patent literature disclosed " a kind of impulse current generator " (application number 200920246326.7) considers that present impulse current generator adopts the larger shortcoming of gas spark gap discharge dispersiveness, adopt controllable silicon as the switch element of impulse current generator, control the silicon controlled conducting by triggering signal, thereby accurately apply impulse current for the valve block of metal oxide pressure-limiting device (MOV), and controllable silicon can keep conducting under very little electric current, can obtain the voltage-current characteristic of MOV valve block under little electric current, thereby provide the voltage of non-linear valve block in the total current section, current data.This current feedback circuit can be used for accurately testing the residual voltage of non-linear valve block under impulse current, can solve the requirement that extensive voltage limiter is produced on certainty of measurement and test speed, and the output impulse current is stable, and accuracy and the resolution of measuring valve plate residual voltage are high.The proposition of this utility model is mainly for the MOV valve block, can produce amplitude is 1.2kA, waveform is the impulse current of 30 μ s/80 μ s, but when load changes, as changing to actual earthing device, this generator can't be exported the amplitude that satisfies the ground connection shock test and require, the impulse current of many waveforms.
Chinese patent literature disclosed " multi-waveform impulse current generator " (application number 200920291257.1) is regulated resistance and the inductance of discharge loop by the various combination pattern that changes resistance, inductance element in discharge loop, thereby has obtained 1 μ s/5 μ s, 8 μ s/20 μ s, three kinds of different impulse current ripples of 4 μ s/10 μ s.This utility model is compared and is produced steep impulse current ripple, standard lightning impulse current wave and three kinds of required equipment of impulse current ripple of switching impulse current ripple, can save in a large number equipment, reduce costs, and reduces the occupation of land space of equipment, improves the utilance of equipment.The main capacitance of this utility model is composed in parallel by the metallization pulse capacitor of 4 150kV/1 μ F, the gross energy that stores is 45kJ, above parameter is enough for the residual voltage measurement of zinc oxide valve plate, but the research for the earthing device impact characteristics is inadequate, and it can't produce the spark effect that enough large impulse current is furtherd investigate earthing device.
Summary of the invention
The purpose of this utility model is to provide a kind of high-voltage large current impulse current generator, can be used for experimental study and the Performance Evaluation of earthing device impact characteristics.
Technical solution of the present utility model is: a kind of high-voltage large current impulse current generator, comprise distributed four impulse current generators that are arranged symmetrically with, a charge circuit and four discharge loops is characterized in that: four impulse current generators charge simultaneously, synchronous discharge.Its beneficial effect is: the separate unit impulse current generator produces the reference waveform impulse current of amplitude 25kA, and four impulse current generators superpose on the earthing device test product and produce amplitude up to the reference waveform impulse current of 100kA; Impulse current generator distributed is arranged symmetrically with the inductance that form can effectively reduce discharge loop, is convenient to modulate the impulse current of the various waveforms that satisfy the experimental study of earthing device impact characteristics and Performance Evaluation requirement; Four impulse current generator locus are different, but by realizing the synchronous triggering igniting of four impulse current generators, relative time between the triggering signal of different impulse current generators is poor in the scope of 0.1 μ s, and the total impulse current waveform after the impulse current stack that therefore different generators produce and the impulse current waveform of separate unit generator are basically identical.
Impulse current generator as above is characterized in that: described
Stream device ba 326 charge circuits are comprised of step-up transformer, high voltage silicon stack, charge protection resistance, D.C. resistance voltage divider, charging overhead transmission line and main capacitance; the input of the output termination high voltage silicon stack of described step-up transformer; the output termination charge protection resistance of high voltage silicon stack; by around the test site ± 100kV DC charging overhead transmission line is to the charging of the main capacitance of four platform independent impulse current generators, the first order main capacitance of described D.C. resistance voltage divider and generator body is connected in parallel.Its beneficial effect is: the charging voltage that is used for measuring the main capacitance two ends.
Impulse current generator as above is characterized in that: described discharge loop comprises main capacitance, atmospherical discharges ball gap, wave regulating resistor, harmonic inductance, built on stilts aluminum pipe, confluence copper bar, coaxial circles cartridge type shunt, analogue ground device, return electrode.
Impulse current generator as above, it is characterized in that: the main capacitance of described separate unit impulse current generator is in series by 5 grades of capacitor groups, every grade of capacitor group is formed by the drum type brake Parallel-connected Capacitor of 3 200kV/0.6 μ F, the charging voltage of separate unit impulse current generator is 1000kV, capacitance is 0.36 μ F, and storage power is 180kJ.Its beneficial effect is: the charging voltage of the impulse current generator of four platform independent all can reach 1000kV, and can produce the impulse current that peak value reaches 100kA under certain loading condition (impedance is less than 4 Ω), be different from existing extreme high voltage impulse voltage generator.
The utility model is domesticly firstly to be exclusively used in electric power system earthing device impact characteristics research, charging voltage and to reach that 1000kV, current peak reach 100kA, output waveform is the impulse current generator of 4 μ s/10 μ s, 8 μ s/20 μ s, this device has the arrangement form novelty, the discharge loop inductance is little, charging voltage grade advantages of higher efficiently solves the technical barrier of exporting high amplitude impulse current.This utility model can satisfy experimental study and the Performance Evaluation of ground connection impact characteristics in different soil, different earthing device pattern, different amplitude and waveform impulse current situation, can reflect truly, objectively earthing device in amplitude up to the transient response under the effect of 100kA impulse current, and Efficient Evaluation spark effect and inductive effect are on the impact of ground connection impact characteristics.Application and research of the present utility model, to help electric power system design, operation department accurately to grasp the impulse earthed resistance of different earthing device under different soil, science, objective, existing earthing device, the impact characteristics of earthing module and the performance of novel resistance-lowering material of assessment effectively.
Description of drawings
The circuit theory diagrams of accompanying drawing 1, high-voltage large current impulse current generator
Accompanying drawing 2, high-voltage large current impulse current generator place layout plan.
Embodiment
Further illustrate execution mode of the present utility model below in conjunction with accompanying drawing.
In accompanying drawing 1, the explanation of mark: T is step-up transformer; D is high-voltage rectification element;
R dBe charge protection resistance;
R 1,
R 2Be the D.C. resistance voltage divider;
C 1,
C 2,
C 3, C
4It is the main capacitance of four impulse current generators;
G 1,
G 2,
G 3, G
4Be four atmospherical discharges ball gaps that main capacitance is corresponding;
LBe loop inductance;
RBe loop inductance;
L 0Be the harmonic inductance;
R 0Be wave regulating resistor;
R sBe shunt;
R 3,
R 4Be resistance divider; G is earthing device and return electrode.
As shown in Figure 1, impulse current generator of the present utility model comprises a charge circuit and four discharge loops.
Charge circuit is by step-up transformer T, high-voltage rectification element D, charge protection resistance
R d, ± 100kV direct current charging cable, main capacitance
C 1,
C 2,
C 3, C
4, the D.C. resistance voltage divider
R 1,
R 2Electrical connection forms.The main capacitance of Single Impact current feedback circuit
C 1,
C 2,
C 3Or C
4Be in series by 5 grades of capacitor groups, every grade of capacitor group is formed by the drum type brake Parallel-connected Capacitor of 3 200kV/0.6 μ F, and the charging voltage of main capacitance is 1000kV, and capacitance is 0.36 μ F, and storage power is 180kJ.Utilize the charging voltage on D.C. resistance voltage divider monitoring main capacitance, when charging voltage reaches designated value, send the charging END instruction, charging is completed.For avoiding because charging current is excessive, to main capacitance
C 1,
C 2,
C 3, C
4Cause damage, charge circuit series connection protective resistance
R dThe elements such as the transformer in charge circuit, high voltage silicon stack, charge protection resistance are in the same place with an impulse current generator centralized arrangement in four impulse current generators, by ± 100kV DC charging overhead transmission line, another three impulse current generators are charged.
Discharge loop is by main capacitance
C 1,
C 2,
C 3, C
4, atmospherical discharges ball gap
G 1,
G 2,
G 3, G
4, the harmonic inductance
L 0, wave regulating resistor
R 0, built on stilts aluminum pipe, shunt
R s, earthing device G, resistance divider
R 3,
R 4Electrical connection forms.Four main capacitances are apart from each other spatially, discharge loop is actual is four independently loops, increase waveform for the current amplitude after the current waveform stack that guarantees four loops generations is linear constant, four ball discharge gaps trigger discharge simultaneously, and triggering signal relative time in time is poor in the scope of 0.1 μ s.
As shown in Figure 2, four impulse current generators are arranged symmetrically in the surrounding of test site, impulse current generator is connected on the bus rod of test site central authorities by built on stilts aluminum pipe, impulse current through earthing device, soil, backflow round loop electrode and vertically upward copper bar return to impulse current generator, consist of the discharge loop of heavy impulse current.Adopt the epoxy resins insulation pillar to carry out insulation between insulation against ground and group to the drum type brake capacitor, insulation column and capacitor alternately support the tower structure that consists of the impulse current generator body, and the ball discharge gap is arranged in tower structure central authorities.Coaxial circles cartridge type shunt is connected on and measures the impulse current that injects earthing device on bus rod, and this electric current is the impulse current sum that four discharge loops produce, and practical function is at the impulse current of being examined on earthing device.Resistance divider is placed on outside return electrode, and the measurement earthing device powers on and flows decanting point with respect to the voltage of zero-potential point.The measuring-signal of shunt and voltage divider between observing and controlling, rises unlikely causing casualties for guaranteeing earth potential, more than observing and controlling spacing impulse current generator body 20m through Optical Fiber Transmission.
Claims (4)
1. a high-voltage large current impulse current generator, comprise distributed four impulse current generators that are arranged symmetrically with, and a charge circuit and four discharge loops is characterized in that: four impulse current generators charge simultaneously, synchronous discharge.
2. impulse current generator as claimed in claim 1; it is characterized in that: described charge circuit is comprised of step-up transformer, high voltage silicon stack, charge protection resistance, D.C. resistance voltage divider, charging overhead transmission line and main capacitance; the input of the output termination high voltage silicon stack of described step-up transformer; the output termination charge protection resistance of high voltage silicon stack; by around the test site ± 100kV DC charging overhead transmission line is to the charging of the main capacitance of four platform independent impulse current generators, the first order main capacitance of described D.C. resistance voltage divider and generator body is connected in parallel.
3. impulse current generator as claimed in claim 1 is characterized in that: described discharge loop comprises main capacitance, atmospherical discharges ball gap, wave regulating resistor, harmonic inductance, built on stilts aluminum pipe, confluence copper bar, coaxial circles cartridge type shunt, analogue ground device, return electrode.
4. impulse current generator as claimed in claim 1, it is characterized in that: the main capacitance of described separate unit impulse current generator is in series by 5 grades of capacitor groups, every grade of capacitor group is formed by the drum type brake Parallel-connected Capacitor of 3 200kV/0.6 μ F, the charging voltage of separate unit impulse current generator is 1000kV, capacitance is 0.36 μ F, and storage power is 180kJ.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220348044XU CN202940748U (en) | 2012-07-18 | 2012-07-18 | High-voltage large-current impulse current generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220348044XU CN202940748U (en) | 2012-07-18 | 2012-07-18 | High-voltage large-current impulse current generator |
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| Publication Number | Publication Date |
|---|---|
| CN202940748U true CN202940748U (en) | 2013-05-15 |
Family
ID=48324970
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|---|---|---|---|
| CN201220348044XU Expired - Fee Related CN202940748U (en) | 2012-07-18 | 2012-07-18 | High-voltage large-current impulse current generator |
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| Country | Link |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424652A (en) * | 2013-07-30 | 2013-12-04 | 中国电力科学研究院 | Impact performance simulation test method and device for grounding body with large simulated size and large amplitude value |
| CN104777337A (en) * | 2015-04-28 | 2015-07-15 | 南京信息工程大学 | Thunder and lightning multiple-pulse waveform generating device |
| CN105510753A (en) * | 2016-01-08 | 2016-04-20 | 国家电网公司 | 100kA lightning current generator for testing impulse characteristics of grounding device |
| CN106814683A (en) * | 2016-12-08 | 2017-06-09 | 国网北京市电力公司 | Waveform generator |
| CN106817036A (en) * | 2015-11-27 | 2017-06-09 | 中国电力科学研究院 | A kind of insulator artificial pollution test high-voltage DC power supply |
| CN109358217A (en) * | 2018-11-27 | 2019-02-19 | 中国电力科学研究院有限公司 | A kind of movable type heavy current impact generator |
-
2012
- 2012-07-18 CN CN201220348044XU patent/CN202940748U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424652A (en) * | 2013-07-30 | 2013-12-04 | 中国电力科学研究院 | Impact performance simulation test method and device for grounding body with large simulated size and large amplitude value |
| CN104777337A (en) * | 2015-04-28 | 2015-07-15 | 南京信息工程大学 | Thunder and lightning multiple-pulse waveform generating device |
| CN104777337B (en) * | 2015-04-28 | 2017-05-10 | 南京信息工程大学 | Thunder and lightning multiple-pulse waveform generating device |
| CN106817036A (en) * | 2015-11-27 | 2017-06-09 | 中国电力科学研究院 | A kind of insulator artificial pollution test high-voltage DC power supply |
| CN105510753A (en) * | 2016-01-08 | 2016-04-20 | 国家电网公司 | 100kA lightning current generator for testing impulse characteristics of grounding device |
| CN105510753B (en) * | 2016-01-08 | 2018-08-31 | 国家电网公司 | A kind of 100kA thunder and lightning flow-generators for the test of earthing or grounding means impact characteristics |
| CN106814683A (en) * | 2016-12-08 | 2017-06-09 | 国网北京市电力公司 | Waveform generator |
| CN109358217A (en) * | 2018-11-27 | 2019-02-19 | 中国电力科学研究院有限公司 | A kind of movable type heavy current impact generator |
| CN109358217B (en) * | 2018-11-27 | 2023-02-28 | 中国电力科学研究院有限公司 | Mobile large-current impulse generator |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20180718 |
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| CF01 | Termination of patent right due to non-payment of annual fee |