CN113991629B - Method for eliminating small gap discharge - Google Patents
Method for eliminating small gap discharge Download PDFInfo
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- CN113991629B CN113991629B CN202111306609.8A CN202111306609A CN113991629B CN 113991629 B CN113991629 B CN 113991629B CN 202111306609 A CN202111306609 A CN 202111306609A CN 113991629 B CN113991629 B CN 113991629B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
Abstract
The invention provides a method for eliminating small-gap discharge, and relates to the field of power utilization. A method for eliminating small-gap discharge comprises a shell, wherein a plasma jet generating device, a first discharging piece and a second discharging piece are arranged in the shell in an opposite mode, a discharge gap is formed between the first discharging piece and the second discharging piece, the plasma jet generating device acts on the discharge gap and is adjustably connected to the shell along the space between the first discharging piece and the second discharging piece, one end of the first discharging piece extends out of the shell and is used for being connected into a transformer, and the second discharging piece extends out of the shell and is used for being grounded. The method can solve the problem of high dispersity caused by air serving as an insulating medium, further cause misoperation of the protection device and damage of the transformer, and reduce power consumption damage caused by misoperation of the protection device.
Description
Technical Field
The invention relates to the field of power utilization, in particular to a method for eliminating small-gap discharge.
Background
When the transformer is applied to the gas-filled cabinet, in order to limit the zero sequence impedance of the transformer system, a grounding mode that the neutral points of part of the transformers are directly grounded and the neutral points of part of the transformers are not grounded is generally adopted. Because 110kV and 220kV kilovolt transformers usually adopt graded insulation, when neutral points are not grounded, in order to protect the neutral points, the neutral points of the transformers are usually grounded in parallel with the lightning arrester through protective gaps. The standard lightning impulse discharge voltage of the gap is lower than the lightning impulse protection level of the neutral point of the transformer, the lightning arrester cannot tolerate power frequency overvoltage exceeding the rated voltage of the lightning arrester, and the upper limit of the power frequency discharge voltage of the gap is required to be smaller than the rated voltage of the lightning arrester; the protection principle is that the lightning arrester is used as main protection of lightning and operation overvoltage under normal operation conditions, the gap is used as backup protection, and once abnormal conditions occur, the gap discharges to protect the lightning arrester.
The insulating medium of the gap is air, so that the breakdown voltage is greatly influenced by the environment, the problems of misoperation of the protection device and transformer damage occur, and the damage caused by the misoperation of the protection device and the like cannot be eliminated by the existing method for eliminating the small-gap discharge of the transformer.
Disclosure of Invention
The invention aims to provide a method for eliminating small-gap discharge, which can solve the problem of high dispersity caused by air serving as an insulating medium, further causes misoperation of a protection device and transformer damage, and reduces power consumption damage caused by misoperation of the protection device.
The embodiment of the invention is realized by the following steps:
the embodiment of the application provides a method for eliminating small-gap discharge, which comprises a shell, wherein a plasma jet generating device, a first discharge part and a second discharge part are arranged in the shell, the first discharge part and the second discharge part are arranged oppositely, a discharge gap is arranged between the first discharge part and the second discharge part, the plasma jet generating device acts on the discharge gap and is adjustably connected to the shell along the space between the first discharge part and the second discharge part, one end of the first discharge part extends out of the shell and is used for being connected to a transformer, and the second discharge part extends out of the shell and is used for being grounded.
In some embodiments of the present invention, the method for eliminating small gap discharge includes a first stabilizer, a second stabilizer, and a driving mechanism, wherein the first stabilizer is slidably mounted on the first discharge element, the second stabilizer is slidably mounted on the second stabilizer, the first stabilizer and the second stabilizer both slide along a direction from the first discharge element to the second discharge element, the plasma jet generating device is connected between the first stabilizer and the second stabilizer, and the driving mechanism is configured to drive the plasma jet generating device to move along a direction from the first discharge element to the second discharge element.
In some embodiments of the present invention, the method for eliminating small gap discharge further includes the following steps: and judging whether the resistance of the plasma jet generating device moving along the direction from the first discharge part to the second discharge part is increased or not, and if so, shifting the first discharge part or the second discharge part.
In some embodiments of the present invention, whether the resistance is increased is determined by the magnitude of the power of the driving mechanism and the moving speed of the plasma jet generating device.
In some embodiments of the present invention, the method for eliminating small gap discharge includes two angle detection devices, and the two angle detection devices are respectively used for detecting the offset angles of the first discharge element and the second discharge element.
In some embodiments of the invention, the housing is pivotally attached to the interior of the inflatable cabinet.
In some embodiments of the present invention, during the installation test, when the voltage signal conducted between the first discharge element and the second discharge element is weak, the voltage signal is increased by adjusting the rotation angle of the housing.
In some embodiments of the present invention, the plasma jet generating device is controlled to be located at a midpoint between the first discharge element and the second discharge element, and then the rotation angle of the housing is adjusted.
In some embodiments of the present invention, an axial direction of the first discharge element is arranged along a direction from the first discharge element to a second discharge element, and an axial direction of the second discharge element coincides with an axial direction of the first discharge element.
In some embodiments of the present invention, the method for eliminating small gap discharge includes a blower, an air outlet of the blower faces between the first discharge element and the second discharge element, and the plasma jet generator is installed at the air outlet of the blower.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
the embodiment of the application provides a method for eliminating small-gap discharge, the method comprises a shell, a plasma jet generating device, a first discharging piece and a second discharging piece are arranged in the shell, the first discharging piece and the second discharging piece are arranged oppositely, a discharge gap is formed between the first discharging piece and the second discharging piece, the plasma jet generating device acts on the discharge gap, the first discharging piece and the second discharging piece are connected to the shell in an adjustable mode, one end of the first discharging piece extends out of the shell and is used for being connected into a transformer, and the second discharging piece extends out of the shell and is used for being grounded.
According to the embodiment of the application, the first discharging part is connected into the transformer, the second discharging part is grounded, and the first discharging part is connected into the transformer, so that a discharging gap is generated between the first discharging part and the second discharging part, and a voltage protection effect is achieved on the transformer; the plasma jet generating device acts on the discharge gaps, plasma jet is formed between the discharge gaps by the plasma jet generating device, when the transformer is subjected to overvoltage, higher voltage appears at two ends of the discharge gaps, and the discharge gaps are immediately conducted by the aid of conductivity of the plasma jet generating device; the first discharge part and the second discharge part are arranged in the shell, so that the formed discharge gap is in a sealed environment, the breakdown of the discharge gap is not influenced by external environmental factors, the dispersity of the breakdown voltage of the discharge gap caused by the change of the environmental factors is eliminated, the reliability of the neutral point protection discharge gap is effectively improved, the misoperation and the transformer damage of the discharge gap under overvoltage are avoided, the use of electronic equipment such as an air inflation cabinet is met, and the air inflation device is suitable for various complicated and severe environments such as plateau, sea and the like; through plasma jet generating device along first discharge to the second discharge between adjustable to can debug when first discharge and second discharge take place relative maloperation, the homoenergetic enough reaches the effect of stable discharge protection under the condition of difference, and prolongs the life of first discharge and second discharge. The invention can solve the problem of larger dispersity caused by air serving as an insulating medium, further cause misoperation of a protection device and damage of a transformer, and reduce power consumption damage caused by misoperation of the first discharging piece and the second discharging piece.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
FIG. 1 is a schematic flow chart illustrating a method for eliminating small gap discharge according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the inside of the housing according to the embodiment of the present invention.
Icon: the plasma jet generator comprises a shell 1, a first discharge part 2, a second discharge part 3, a sliding rail 4, a plasma jet generating device 5, a fan 6, a bearing seat 7 and a controller 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments and features of the embodiments described below can be combined with one another without conflict.
Examples
Referring to fig. 1-2, fig. 1-2 are schematic diagrams illustrating a method for eliminating small gap discharge according to an embodiment of the present disclosure. The method for eliminating the small gap discharge comprises a first stabilizing frame, a second stabilizing frame and a driving mechanism, wherein the first stabilizing frame is slidably mounted on the first discharge element 2, the second stabilizing frame is slidably mounted on the second stabilizing frame, the first stabilizing frame and the second stabilizing frame both slide along the direction from the first discharge element 2 to the second discharge element 3, the plasma jet generating device 5 is connected between the first stabilizing frame and the second stabilizing frame, and the driving mechanism is used for driving the plasma jet generating device 5 to move along the direction from the first discharge element 2 to the second discharge element 3.
In detail, a cavity is arranged inside the housing 1, and the housing 1 may be an integrally formed sealing structure and made of an insulating material. Wherein the cavity accommodates the first discharge element 2, the second discharge element 3 and the plasma jet device. First discharge 2 and second discharge 3 wear to locate shell 1 both ends respectively to relative interval sets up, forms the discharge gap. One end of the first discharging part 2 extending out of the shell 1 is electrically connected with the transformer, and one end of the second discharging part 3 extending out of the shell 1 is grounded. The one end that first discharge 2 stretched into the inside of shell 1 and the one end that second discharge 3 stretched into the inside of shell 1 set up coaxially and are close to each other to form the discharge gap. The plasma is installed between the first discharging part 2 and the second discharging part 3, is used for emitting plasma jet, and acts on a discharging gap between the first discharging part 2 and the second discharging part 3. The power supply of the plasma jet device is arranged outside the shell 1, the joint of the shell 1 is sealed, and the cavity is filled with non-air insulating gas, such as nitrogen, so as to further prevent the influence of the external environment. The first discharge element 2 and the second discharge element 3 are conventional, and are not specifically limited herein, and the first discharge element 2 may employ a rod gap or a ball gap, and the second discharge element 3 may employ a rod gap or a ball gap.
Optionally, the plasma jet generating device 5 includes a ground electrode plate, a high-voltage electrode plate, an insulating layer, and a teflon tube. The grounding electrode plate and the high-voltage electrode plate are coaxially arranged, jet holes are formed in the centers of the grounding electrode plate and the high-voltage electrode plate, and the insulating layer is arranged between the grounding electrode plate and the high-voltage electrode plate. High voltage is generated between the grounding electrode plate and the high voltage electrode plate through the radio frequency power supply, insulating gas is punctured, gas molecules can be ionized in a short time, and plasma jet is formed.
Optionally, the plasma jet generating device 5 may be adjusted by means of a sliding rail 4, a lead screw, a thread matching, and the like, so that the plasma jet generating device 5 radially reciprocates along the distance from the first discharging part 2 to the second discharging part 3. Optionally, the slide rail 4 is a linear slide rail 4 and is installed inside the housing, a sliding direction of the slide rail 4 is set along the first discharge element 2 to the second discharge element 3, and is parallel to the first discharge element 2 and the second discharge element 3, wherein the slide rail 4 may be installed on the housing 1. Optionally, the movement of the plasma-jet generating device 5 is regulated by a controller 8. Alternatively, the controller 8 may drive the plasma jet generating device 5 to slide by controlling the stepping motor. The controller 8 may be disposed inside the housing 1 or outside the housing. Optionally, the sliding rail 4 may be mounted on the first discharge element 2/the second discharge element 3 and disposed along the axial direction of the first discharge element 2/the second discharge element 3, so as to prevent the discharge protection effect from being reduced or even failed due to the deviation of the first discharge element 2/the second discharge element 3. Optionally, the number of the slide rails 4 is two, and the two slide rails 4 are correspondingly mounted on the first discharge element 2 and the second discharge element 3 one by one, so that the plasma jet device is respectively matched with the two slide rails 4 in a sliding manner.
During the use, remove along first discharge 2 to second discharge 3 through plasma jet generating device 5 for be close to or keep away from first discharge 2, correct plasma jet generating device 5's position, prevent to cause plasma jet generating device 5 mistake to move because of assembly, transportation reason, improve plasma jet generating device 5's the discharge protection effect. And through adjusting plasma jet generating device 5 to be close to or keep away from first discharge 2, can adjust the voltage protection threshold value, be adapted to different requirements, reduce the cost to prevent that too big voltage impact from damaging transformer and protection piece simultaneously, causing unnecessary loss, thereby play increase of service life's effect. Optionally, the position of the plasma jet device is debugged, so that the protection of voltage impact with different sizes can be realized, and the requirements of transformers with different specifications are met. For example, when approaching the first discharging part 2 gradually, the better the voltage shock preventing effect is, so that the moving range of the plasma jet device is set, and further the slide rail 4 may be set. The specific moving range may refer to a distance between the first discharge element 2 and the second discharge element 3, and a midpoint position of the first discharge element 2 and the second discharge element 3. And the testing can be performed by connecting transformers with different specifications, so that the product quality detection and use are facilitated.
In some embodiments of the present invention, the method for eliminating small gap discharge includes a first stabilizer slidably mounted on the first discharge element 2, a second stabilizer slidably mounted on the second stabilizer, the first stabilizer and the second stabilizer both slidably move along the direction from the first discharge element 2 to the second discharge element 3, the plasma jet generating device 5 is connected between the first stabilizer and the second stabilizer, and a driving mechanism for driving the plasma jet generating device 5 to move along the direction from the first discharge element 2 to the second discharge element 3.
Optionally, the first stabilizing frame is slidably mounted on the first discharge element 2 through a slide rail 4, and the second stabilizing frame is mounted on the second discharge element 3 through a slide rail 4. Alternatively, the plasma-jet generating device 5 is driven by a step-and-click.
In some embodiments of the present invention, the method for eliminating small gap discharge further includes the following steps: it is determined whether or not the resistance of the plasma jet generator 5 to move in the direction from the first discharge element 2 to the second discharge element 3 is large, and if so, the first discharge element 2 or the second discharge element 3 is displaced.
Whether the first discharge element 2 or the second discharge element 3 is cheap or not is judged by judging the resistance when the plasma jet generating device 5 moves in the direction from the first discharge element 2 to the second discharge element 3. Optionally, when the resistance becomes larger to a specific threshold, the equipment can be overhauled, so that the positions of the first discharging part 2 and the second discharging part 3 are debugged, and the discharging protection effect is maintained conveniently.
In some embodiments of the present invention, whether the resistance is increased is determined by the magnitude of the power of the driving mechanism and the moving speed of the plasma jet generating device 5.
In detail, the movement of the plasma jet is controlled by the magnitude of the power output by the stepping motor, and the controller 8 is in communication connection with the driving mechanism, so that the magnitude of the power output is changed, and the movement speed of the plasma jet generating device 5 is detected by the sensor, so that the magnitude of the movement resistance of the plasma jet generating device 5 is judged. In detail, the controller 8 is in communication connection with the sensor, so that the moving speed is obtained, and the resistance change of the plasma jet generating device 5 in moving is judged according to the power change and the moving speed. Alternatively, the resistance increases when the moving speed is constant while the power is increased, and the resistance increases when the moving speed is decreased while the power is constant.
In some embodiments of the present invention, the method for eliminating small gap discharge includes two angle detection devices, and the two angle detection devices are respectively used for detecting the offset angles of the first discharge element 2 and the second discharge element 3.
In detail, the angle detection device, such as an angular velocity sensor or a level gauge, can further detect the offset angle of the first discharge element 2 and the second discharge element 3, thereby further improving the maintenance efficiency. Optionally, be equipped with the alarm, controller 8 is through the resistance size that detects the plasma efflux and remove to utilize the alarm to remind people to overhaul, and according to angle detection device's detection angle, can adjust and fix first discharge 2 and second discharge 3.
In some embodiments of the invention, the housing 1 is pivotally connected to the inside of the cabinet.
In detail, the shell 1 can be rotatably connected inside the inflating cabinet through the bearing seat 7, the position of the shell 1 can be further adjusted, static electricity or other signal interference is prevented, and a wire is conveniently arranged during installation. Wherein, the length direction of first discharge 2 and the length direction one of second discharge 3 are located the collinear, and the emission direction of first discharge 2 is unanimous with length direction, and the emission direction of second discharge 3 is unanimous with length direction, and the radiation direction of first discharge 2 and second discharge 3 sets up in opposite directions. The length direction of the plasma jet generating device 5 is perpendicular to the length direction of the first discharge part 2/the second discharge part 3, and the length direction of the plasma jet generating device 5 is consistent with the radiation direction. The first discharge element 2 and the second discharge element 3 are rotatable around the circumference of the plasma jet generating device 5 by means of a bearing support 7.
In some embodiments of the present invention, when a voltage signal conducted between the first discharge element 2 and the second discharge element 3 is weak during an installation test, the voltage signal is increased by adjusting a rotation angle of the housing 1.
Optionally, the test is completed by connecting the transformer to the test voltage, and the housing 1 can be fixedly mounted after the test.
In some embodiments of the present invention, the plasma jet generating device 5 is controlled to be located at a midpoint between the first discharge element 2 and the second discharge element 3, and then the rotation angle of the housing 1 is adjusted.
In detail, when judging that the first discharge part 2 and the second discharge part 3 deviate, the controller 8 debugs the positions of the first discharge part 2 and the second discharge part 3 by moving the plasma jet generating device 5 to the middle point between the first discharge part 2 and the second discharge part 3, thereby ensuring the stability of discharge protection and improving the installation efficiency.
In some embodiments of the present invention, the axial direction of the first discharge element 2 is arranged along the direction from the first discharge element 2 to the second discharge element 3, and the axial direction of the second discharge element 3 coincides with the axial direction of the first discharge element 2.
The axial direction of the first discharge element 2 and the axial direction of the second discharge element 3 are located on the same straight line, so that a discharge gap is formed between the first discharge element 2 and the second discharge element 3.
In some embodiments of the present invention, the method for eliminating small gap discharge includes a fan 6, an air outlet of the fan 6 faces between the first discharge element 2 and the second discharge element 3, and the plasma jet generating device 5 is installed at the air outlet of the fan 6.
Wherein, the fan 6 sprays plasma jet along with the insulating gas flow; when the transformer is subjected to overvoltage and high voltage appears at two ends of the discharge gap, the gap can be broken down immediately due to the conductivity of plasma.
It will be appreciated that the arrangement shown in figure 2 is merely illustrative and that the interior of the housing 1 may also include more or fewer components than shown in figure 1 or have a different configuration than that shown in figure 1. The components shown in fig. 1 may be implemented in hardware, software, or a combination thereof.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
To sum up, the method for eliminating small gap discharge provided by the embodiment of the present application:
according to the embodiment of the application, the first discharging part 2 is connected to the transformer, the second discharging part 3 is grounded, and the first discharging part 2 is connected to the transformer, so that a discharging gap is generated between the first discharging part 2 and the second discharging part 3, and a voltage protection effect is achieved on the transformer; acting on the discharge gaps through the plasma jet generating device 5, forming plasma jet between the discharge gaps by using the plasma jet generating device 5, when the transformer is subjected to overvoltage, higher voltage appears at two ends of the discharge gaps, and the discharge gaps are immediately conducted by using the conductivity of the plasma jet generating device 5; the first discharge part 2 and the second discharge part 3 are arranged in the shell 1, so that the formed discharge gap is in a sealed environment, the breakdown of the discharge gap is not influenced by external environmental factors, the dispersity of the breakdown voltage of the discharge gap caused by the change of the environmental factors is eliminated, the reliability of the neutral point protection discharge gap is effectively improved, the misoperation and the transformer damage of the discharge gap under overvoltage are avoided, the use of electronic equipment such as an air inflation cabinet is met, and the air inflation device is suitable for various complicated and severe environments such as plateau, sea and the like; through adjustable between plasma jet generating device 5 along first discharge 2 to second discharge 3 to can debug when relative maloperation takes place for first discharge 2 and second discharge 3, all can reach the effect of stable discharge protection under the condition of difference, and prolong the life of first discharge 2 and second discharge 3. The invention can solve the problem of larger dispersity caused by air serving as an insulating medium, further cause misoperation of a protection device and damage of a transformer, and reduce power consumption damage caused by misoperation of the first discharging part 2 and the second discharging part 3.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. A method for eliminating small-gap discharge is characterized by comprising a shell, wherein a plasma jet generating device, a first discharging piece and a second discharging piece are arranged in the shell in an opposite mode, a discharge gap is formed between the first discharging piece and the second discharging piece, the plasma jet generating device acts on the discharge gap and is adjustably connected to the shell along the space between the first discharging piece and the second discharging piece, one end of the first discharging piece extends out of the shell and is used for being connected into a transformer, and the second discharging piece extends out of the shell and is used for being grounded; the plasma jet generating device comprises a first stabilizing frame, a second stabilizing frame and a driving mechanism, wherein the first stabilizing frame is slidably mounted on the first discharging piece, the second stabilizing frame is slidably mounted on the second discharging piece, the first stabilizing frame and the second stabilizing frame both slide along the direction from the first discharging piece to the second discharging piece, the plasma jet generating device is connected between the first stabilizing frame and the second stabilizing frame, and the driving mechanism is used for driving the plasma jet generating device to move along the direction from the first discharging piece to the second discharging piece; judging whether the resistance of the plasma jet generating device moving along the direction from the first discharging part to the second discharging part is increased, and if so, enabling the first discharging part or the second discharging part to shift; and judging whether the resistance is increased or not according to the power of the driving mechanism and the moving speed of the plasma jet generating device.
2. The method of claim 1, comprising two angle detectors for detecting the offset angles of the first and second discharge elements, respectively.
3. The method of eliminating small gap discharges of claim 1, wherein said housing is pivotally attached to the interior of the gas-filled cabinet.
4. The method of claim 3, wherein the voltage signal is increased by adjusting a rotation angle of the housing when the voltage signal conducted between the first discharge element and the second discharge element is weak during the mounting test.
5. The method of claim 4, wherein the plasma jet generating device is controlled to adjust the rotation angle of the housing after the plasma jet generating device is positioned at the midpoint of the first discharge element and the second discharge element.
6. The method of claim 1, wherein an axial direction of the first discharge element is arranged along a direction from the first discharge element to a second discharge element, and an axial direction of the second discharge element is coincident with an axial direction of the first discharge element.
7. The method of claim 1, further comprising a blower having an outlet opening facing between the first discharge element and the second discharge element, wherein the plasma jet generator is mounted at the outlet opening of the blower.
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| JP2007250755A (en) * | 2006-03-15 | 2007-09-27 | Hitachi High-Technologies Corp | Plasma processing device |
| CN101479900A (en) * | 2006-05-12 | 2009-07-08 | 能量脉冲科技有限公司 | Composite spark plug |
| CN202995532U (en) * | 2011-04-22 | 2013-06-12 | 德塞拉股份有限公司 | Electronic device with electronic assembly and electrohydrodynamic fluid mover |
| CN112310814A (en) * | 2020-11-19 | 2021-02-02 | 西安热工研究院有限公司 | Totally-enclosed controllable transformer neutral point protection discharge gap |
| CN112736884A (en) * | 2020-12-22 | 2021-04-30 | 西安交通大学 | Surge protector with active field breakdown overvoltage protection gap |
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| CN113991629A (en) | 2022-01-28 |
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