CN103308736B - Small-sized integrated steep pulse generating means - Google Patents
Small-sized integrated steep pulse generating means Download PDFInfo
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- CN103308736B CN103308736B CN201310276540.8A CN201310276540A CN103308736B CN 103308736 B CN103308736 B CN 103308736B CN 201310276540 A CN201310276540 A CN 201310276540A CN 103308736 B CN103308736 B CN 103308736B
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- 239000003990 capacitor Substances 0.000 claims abstract description 49
- 239000012212 insulator Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 5
- 230000015556 catabolic process Effects 0.000 claims description 4
- 239000002828 fuel tank Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 37
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Generation Of Surge Voltage And Current (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The disclosure relates to a kind of small-sized integrated steep pulse generating means, comprise fuel tank and hang the oil immersed type impulse voltage generator in fuel tank internal by insulating support, this generator comprises the impulse voltage generator loop formed based on multiple impulse capacitor, gas spark switch and resistance; Multiple annular capacitor shields structure; First, second and the 3rd insulating part; Multiple impulse capacitor and gas spark switch are alternately fixed on the second insulating part along same axis; Layout multiple annular capacitor shields structure around multiple impulse capacitor, is fixed on the first insulating part by multiple annular capacitor shields structure; Multiple resistance is arranged on the pros and cons of the 3rd insulating part; Realized by hi-line and multiple resistance, electrical connection between impulse capacitor and gas spark switch; 3rd insulating part is fixed on the second insulating part; Insulating support is connected with the first insulating part.Exportable pulse up to standard when the disclosure is done experiment to Large Copacity test product.
Description
Technical Field
The present disclosure relates to steep front pulse generators, and in particular, to a small integrated steep front pulse generator.
Background
In the prior art, a steep front pulse is generally generated by an impulse voltage generator, specifically, impulse voltage can be output by a common open impulse voltage generator, and the impulse voltage is steeped by a steepening gap through an overhead bus to obtain the required steep front pulse.
Fig. 1 is a schematic diagram of a conventional tower-type surge voltage generator.
As shown in fig. 1, the conventional open type steep front pulse generator is bulky, inconvenient to transport, and not easy to perform a GIS (gas insulated switchgear) insulation characteristic test on site; meanwhile, the device is designed in a traditional open mode, and the device is large in structural size and is of a nonlinear structure due to the consideration of insulation requirements, so that the loop inductance is large, the generated pulse sharpening effect is poor, and the influence of environmental factors is large. When a large-capacity sample is tested, the waveform is easy to fail to reach the standard.
Disclosure of Invention
The present disclosure proposes a new technical solution in view of at least one of the above problems.
The present disclosure provides, in one aspect thereof, a small integrated steep front pulse generator that can effectively reduce the loop inductance of the device, thereby making the rising edge of the output pulse up to standard.
According to the present disclosure, there is provided a small-sized integrated steep front pulse generator, comprising an oil tank and an oil-immersed impulse voltage generator suspended in the oil tank by an insulating bracket in an inclined manner, wherein,
the oil-immersed impulse voltage generator comprises:
a surge voltage generator circuit formed based on the plurality of pulse capacitors, the plurality of gas spark switches, and the plurality of resistors;
a plurality of annular capacitor shield structures;
a first insulating member;
a second insulating member; and
a third insulating member;
wherein,
the pulse capacitors and the gas spark switches are alternately arranged along the same axis and fixed on the second insulating part;
arranging a plurality of annular capacitor shielding structures around the plurality of pulse capacitors, and fixing the plurality of annular capacitor shielding structures on the first insulating part;
arranging a plurality of resistors on the front and back sides of the third insulating member;
the electrical connection among the plurality of resistors, the plurality of pulse capacitors and the plurality of gas spark switches in the impulse voltage generator loop is realized through the high-voltage wire and the through holes on the third insulating part;
fixing a third insulating member to the second insulating member;
the insulating support is connected with the first insulating part.
In some embodiments of the present disclosure, the plurality of gas spark switches are three-electrode field distortion switches connected in series in the surge voltage generator circuit via gas paths.
In some embodiments of the present disclosure, the plurality of gas spark switches are arranged in a surge voltage generator circuit from a dc charging terminal in a low to high breakdown voltage order.
In some embodiments of the present disclosure, the discharge voltage of each gas spark switch is controlled by the gas type and pressure within the cavity in which it is located.
In some embodiments of the present disclosure, the surface of the insulating support is an equidistant shed structure.
In some embodiments of the present disclosure, the umbrella spacing is equal to the skirt thickness, and the skirt edges are rounded.
In some embodiments of the present disclosure, the shed thickness and the number of umbrellas are determined according to the insulation requirements.
In the technical scheme of this disclosure, the small-size integration steep front pulse generating device who provides has totally closed, compact and the characteristics of being convenient for transport, because compact structure, consequently can effectively reduce the loop inductance of whole device, and then makes the device can output up to standard steep front pulse.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, are incorporated in and constitute a part of this application. In the drawings:
fig. 1 is a schematic diagram of a conventional tower-type surge voltage generator.
Fig. 2 is a schematic structural diagram of a small integrated steep front pulse generator according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram of a Marx loop.
Fig. 4 is a schematic view of a first assembly of the present disclosure.
Fig. 5 is a second assembly schematic of the present disclosure.
Fig. 6 is a third assembly schematic of the present disclosure.
Fig. 7 is a fourth assembly schematic of the present disclosure.
Detailed Description
The present disclosure will be described below with reference to the accompanying drawings. It is to be noted that the following description is merely illustrative and exemplary in nature and is in no way intended to limit the disclosure, its application, or uses. Unless specifically stated otherwise, the relative arrangement of components and steps and numerical expressions and values set forth in the embodiments do not limit the scope of the present disclosure. Additionally, techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail but are intended to be part of the specification where appropriate.
In view of this, the following embodiments of the present disclosure provide a fully enclosed, compact, and easily transportable integrated miniaturized steep front pulse generator. In addition, the pulse generator adopts a linear design, has compact structure, reduces unnecessary connecting wires and also reduces the volume of the pulse generator. Therefore, the integrated and miniaturized design can effectively reduce the loop inductance of the whole device, and can enable the rising edge of the output pulse to reach the standard when a high-capacity test article is subjected to a voltage withstanding test.
Fig. 2 is a schematic structural diagram of a small integrated steep front pulse generator according to an embodiment of the present disclosure.
As shown in fig. 2, the pulse generator may include an oil tank 1 and an oil-immersed surge voltage generator 2 suspended in the oil tank 1 by an insulating support 6-1, 6-2, 6-3, and the surge voltage generator may be immersed in transformer oil by a cable-stayed suspension to reduce the size of the structure and increase the surface flashover voltage, wherein,
the oil-immersed surge voltage generator 2 may in turn comprise:
a surge voltage generator loop formed by a plurality of pulse capacitors 9, a plurality of gas spark switches 8 and a plurality of resistors 5, wherein the capacitors are charged in parallel and discharged in series;
a plurality of annular capacitor shield structures 4-1 to 4-6;
a first insulating member 3-1;
a second insulating member 3-2; and
a third insulating member 3-3;
wherein,
the pulse capacitors 9 and the gas spark switches 8 are alternately arranged and fixed on the second insulating part 3-2 along the same axis, and the linear arrangement mode of the pulse capacitors and the gas spark switches obviously shortens the loop length and effectively reduces the loop inductance;
a plurality of annular capacitor shielding structures 4-1 to 4-6 are arranged around the plurality of pulse capacitors 9 to improve the electric field distribution of the whole device, prevent the corners of the capacitors from partial discharge due to local high field intensity to damage the capacitors, and fix the plurality of annular capacitor shielding structures on the first insulating part 3-1;
a plurality of resistors 5 are arranged on the front and back surfaces of the third insulating part 3-3, so that the whole impulse voltage generator is more compact in structure and miniaturized in design;
the electrical connection among the plurality of resistors 5, the plurality of pulse capacitors 9 and the plurality of gas spark switches 8 in the surge voltage generator circuit is realized through high-voltage wires and through holes on the third insulating member 3-3;
fixing the third insulating member 3-3 to the second insulating member 3-2;
the insulating supports 6-1, 6-2, 6-3 are connected to the first insulating member 3-1.
The small-size integrated steep front pulse generating device has the characteristics of full sealing, compactness and convenience in transportation, and due to the compact structure, the loop inductance of the whole device can be effectively reduced, and the device can output the standard steep front pulse.
The gas spark switches 8 may be three-electrode field distortion switches to ensure consistency of switch discharge, and are connected in series in a surge voltage generator circuit, such as the surge voltage generator circuit shown in fig. 3, through gas paths.
Further, in the surge voltage generator circuit, a plurality of gas spark switches 8 are arranged from the dc charging terminal in accordance with their breakdown voltages from low to high, and several switches near the dc charging terminal are liable to discharge from low breakdown voltages and the latter switches are liable to discharge due to voltage doubling, so that the synchronism of the device operation can be improved.
A plurality of gas spark switches 8 are arranged in the closed cavity, each gas spark switch is provided with an air inlet hole and an air outlet hole, and after the plurality of gas spark switches are connected in series, one air inlet hole and one air outlet hole are left on the whole body, and the electric strength of different gases is different; the discharge voltage of the same gas will also change with the gas pressure, so the type and pressure of the gas in the cavity where the whole gas spark switch system is located is controlled according to the test voltage (i.e. the dc charging voltage that each gas spark switch needs to withstand). For example, if the test voltage is high, a gas with high electric strength can be used, or the gas pressure in the gas switch can be increased to synchronize the switch discharge.
In addition, the surfaces of the insulating supports 6-1, 6-2 and 6-3 are of umbrella skirt structures with equal intervals, so that the climbing and flashing distance can be increased.
Wherein, the umbrella interval equals with full skirt thickness, and full skirt border is the fillet. And the thickness of the umbrella skirt and the number of the umbrellas are determined according to the insulation requirement.
Furthermore, in order to enable the pulse leading edge output by the oil-immersed impulse voltage generator to be adjustable, a wave adjusting resistor 7 can be arranged at the output end of the generator, the wave adjusting resistor is arranged on the annular capacitor shielding structures 4-6, 4-7 and 4-8, and the annular capacitor shielding structures 4-6, 4-7 and 4-8 are fixed on the fourth insulating part 3-4. Because the pressure drop born by the middle of the two rings is higher, the umbrella groups are arranged, and the creepage distance is increased.
The wave-adjusting resistor 7 is adjustable in steps and used for adjusting waveform parameters, the resistance value of the wave-adjusting resistor is related to the loop inductance of the whole device, the rising edge of the pulse is ensured to be steep enough, the whole loop is in an underdamped state, and the discharging current is limited so as not to cause damage to test equipment and a test sample due to overlarge discharging current. The wave-modulating resistor 7 can adopt a double-wire opposite winding mode.
The pulse capacitor in the above embodiments may be a small inductance pulse capacitor.
Compared with the traditional open type impulse voltage generator, the embodiment of the disclosure adopts a switch capacitor integrated structure, and the impulse voltage generator is immersed in transformer oil in a cable-stayed suspension mode of the insulating support, so that the integrated design of the whole device is realized, and the reliability of the device is ensured. Meanwhile, the annular capacitor shielding structure and the third insulating part are matched, so that the electric field distribution is optimized, and the structural size is reduced; the gas spark switches are arranged in the sealed and inflated cavity, the types and the air pressure of the gas in the cavity are changed according to the test voltage, the arrangement sequence of the gas spark switches can be arranged from low to high according to the self-breakdown voltage, and the synchronism of the switching action of the device during working can be enhanced. The integrated miniaturization design effectively reduces the loop inductance of the whole device, and can ensure the gradient of output pulse when a high-capacity test article is subjected to a voltage withstand test.
In addition, the steep front pulse generator in the embodiment of the disclosure can be matched with the middle energy storage oil line and the peaking switch, and the required steep front pulse is obtained through the matching of the wave modulating resistor and the peaking switch gap adjusting unit. Specifically, the steep wave generated by the steep front pulse generator is stored in the intermediate energy storage oil line, and then the peaking switch discharges after reaching the self-breakdown voltage, and a waveform steeper than the output end of the pulse generator is generated at the rear end of the peaking switch.
The closed design makes the whole device less affected by environmental factors.
Next, the assembly process of the small integrated steep front pulse generator will be described in detail with reference to the drawings.
(1) As shown in fig. 4, a plurality of circular ring-shaped capacitor shielding structures 4 are integrally fixed by a first insulating member 3-1 and a second insulating member 3-2.
(2) As shown in fig. 5, a plurality of pulse capacitors 9 and a plurality of gas spark switches 8 are electrically connected in series on the second insulating member 3-2, and the plurality of gas spark switches 8 are connected in series through a gas pipe.
(3) As shown in fig. 6, the resistors 5 are arranged in a zigzag shape on both sides of the third insulating member 3-3, the respective resistors 5 are electrically connected through the through holes 19 of the third insulating member 3-3, and the resistors 5 are connected to the plurality of pulse capacitors 9 through high voltage wires according to the circuit diagram shown in fig. 3.
(4) As shown in fig. 7, the insulating bracket 6-1 is connected to the first insulating member and finally fixed to the top of the fuel tank.
The final assembled schematic is shown in fig. 2.
In a specific example, the impulse voltage generator can be suspended in the oil tank through 6 insulating supports in an inclined mode, a 5-level bilateral charging loop is adopted, and voltage superposition is achieved through 10 small inductance pulse capacitors and 5 gas spark switches.
Wherein, the pulse capacitor can be a small inductance pulse capacitor of 100kV and 100-300 nF; chargeable N in gas spark switch2And SF6The air pressure may be dependent on the charging voltage. A circular capacitor shielding structure is additionally arranged around the impulse voltage generator, the diameter and the number of the circular capacitor shielding structure can be selected according to actual size, the voltage amplitude of the generated steep front pulse can reach 1MV, the rising edge can reach tens of nanoseconds, and if the circular capacitor shielding structure is matched with a middle energy storage oil line and a peaking switch, the rising edge can be less than 10 ns.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments can be mutually referred to. For the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and reference may be made to the description of the method embodiment section for the relevant points.
The oil-immersed impulse voltage generator in the above embodiments of the present disclosure adopts a switch-capacitor integrated structure, and adopts a linear arrangement mode of a small inductance pulse capacitor and a gas spark switch, so as to shorten the loop length, reduce the loop inductance, increase the speed of energy delivery to a lower peaking switch, and create conditions for realizing steep front pulse with extremely steep wave head. The integrated miniaturized steep front pulse generator in the embodiment of the disclosure has the advantages of small volume and convenience in transportation, and can be used for conveniently carrying out different tests in a laboratory and on site, such as tests of 1000kVGIS insulators, 500kVGIS insulators, SF6 gaps and the like.
While the present disclosure has been described with reference to exemplary embodiments, it should be understood that the present disclosure is not limited to the exemplary embodiments described above. It will be apparent to those skilled in the art that the above-described exemplary embodiments may be modified without departing from the scope and spirit of the disclosure. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
Claims (7)
1. A small-sized integrated steep front pulse generator is characterized by comprising an oil tank and an oil-immersed impulse voltage generator which is obliquely pulled and suspended in the oil tank through an insulating bracket, wherein,
the oil-immersed impulse voltage generator includes:
a surge voltage generator circuit formed based on the plurality of pulse capacitors, the plurality of gas spark switches, and the plurality of resistors;
a plurality of annular capacitor shield structures;
a first insulating member;
a second insulating member; and
a third insulating member;
wherein,
the pulse capacitors and the gas spark switches are alternately arranged and fixed on the second insulating part along the same axis;
arranging the plurality of circular ring-shaped capacitor shielding structures around the plurality of pulse capacitors and fixing the plurality of circular ring-shaped capacitor shielding structures on the first insulating member;
disposing the plurality of resistors on the front and back sides of the third insulator;
electrically connecting the plurality of resistors, the plurality of pulse capacitors, and the plurality of gas spark switches in the surge voltage generator circuit through high voltage lines and through holes in the third insulator;
securing the third insulator to the second insulator;
and connecting the insulating bracket with the first insulating part.
2. The compact integrated steep front pulse generator device according to claim 1, wherein said plurality of gas spark switches are three-electrode field distortion switches connected in series in said surge voltage generator circuit via gas paths.
3. The compact integrated steep front pulse generator according to claim 1 or 2, wherein said plurality of gas spark switches are arranged in said surge voltage generator circuit from a dc charging terminal in a low to high breakdown voltage order.
4. The compact integrated steep front pulse generator according to claim 1, characterized in that the discharge voltage of each gas spark switch is controlled by the gas type and pressure in the chamber in which it is located.
5. The compact integrated steep front pulse generator device according to claim 1, wherein said insulating support has a surface with an equidistant shed structure.
6. A compact integrated steep front pulse generator as claimed in claim 5, wherein the distance between the umbrellas is the same as the thickness of the shed, and the edges of the shed are rounded.
7. The small-sized integrated steep front pulse generator according to claim 6, wherein the thickness of the shed and the number of umbrellas are determined according to the insulation requirements.
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| CN201310276540.8A CN103308736B (en) | 2013-07-03 | 2013-07-03 | Small-sized integrated steep pulse generating means |
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| CN201310276540.8A CN103308736B (en) | 2013-07-03 | 2013-07-03 | Small-sized integrated steep pulse generating means |
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| CN103308736B true CN103308736B (en) | 2016-02-24 |
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| CN104113051B (en) * | 2014-07-07 | 2017-05-24 | 西北核技术研究所 | Energy transference system and method based on primary pulse source self coupling |
| CN104113187B (en) * | 2014-07-07 | 2017-01-04 | 西北核技术研究所 | Fast-response electric pulse based on the charging of primary pulse source triggers system and method |
| CN104459235B (en) * | 2014-12-09 | 2017-05-24 | 国家电网公司 | Compact closed gas insulation impulse voltage generation device |
| CN104483607B (en) * | 2014-12-19 | 2018-10-19 | 西安交通大学 | A kind of inflatable compact surge voltage generating means |
| CN104617918B (en) * | 2014-12-19 | 2017-06-30 | 西安交通大学 | A kind of totally-enclosed inflatable impulse voltage generator is installed and method for dismounting |
| CN104467512B (en) * | 2014-12-19 | 2017-06-23 | 西安交通大学 | A kind of surge voltage generating means |
| CN104699150B (en) * | 2015-03-09 | 2016-03-02 | 国家电网公司 | Closed compact impulse voltage generator waveform adjustment device |
| CN105044410A (en) * | 2015-08-27 | 2015-11-11 | 武汉华高高电压设备新技术有限公司 | Impulse voltage generator |
| CN105353279B (en) * | 2015-11-12 | 2021-04-30 | 中国电力科学研究院 | Self-supporting quick-mounting impulse voltage generator and mounting method thereof |
| CN106771418A (en) * | 2015-11-19 | 2017-05-31 | 中国电力科学研究院 | A kind of many ball electrode ignition devices of novel closed-type |
| CN107132385A (en) * | 2016-02-26 | 2017-09-05 | 扬州市鑫源电气有限公司 | A kind of tandem SF6 gas-insulateds surge voltage generating means |
| CN106932697A (en) * | 2017-04-19 | 2017-07-07 | 天津市电力科技发展有限公司 | GIS equipment partial discharge detection means under oscillation mode surge voltage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201238269Y (en) * | 2008-03-10 | 2009-05-13 | 中国电力科学研究院 | Impulse voltage generator |
| CN101324651B (en) * | 2008-07-28 | 2011-01-12 | 青海电力科学试验研究院 | Mobile on-site impact pressure-proof test apparatus and method of 750 V voltage grading GIS equipment |
| CN102158116B (en) * | 2011-01-20 | 2013-02-06 | 西安交通大学 | Impulse voltage generator for triggering multi-channel discharge gas spark switch |
| CN102901917B (en) * | 2012-10-22 | 2015-04-01 | 云南电力试验研究院（集团）有限公司电力研究院 | Field generating device of steep pulses |
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