CN114843882B - Line lightning arrester - Google Patents
Line lightning arrester Download PDFInfo
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- CN114843882B CN114843882B CN202110133361.3A CN202110133361A CN114843882B CN 114843882 B CN114843882 B CN 114843882B CN 202110133361 A CN202110133361 A CN 202110133361A CN 114843882 B CN114843882 B CN 114843882B
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- arc extinguishing
- lightning
- energy
- discharge electrode
- driving device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/02—Means for extinguishing arc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
- H01B17/46—Means for providing an external arc-discharge path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/02—Means for extinguishing arc
- H01T1/08—Means for extinguishing arc using flow of arc-extinguishing fluid
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/02—Details
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a line arrester, which comprises an arc extinguishing cavity, wherein a grounding side discharge electrode and a high-voltage side discharge electrode are arranged in the arc extinguishing cavity in an up-down opposite mode, and a discharge gap is formed between the grounding side discharge electrode and the high-voltage side discharge electrode. The device also comprises an induction coil, wherein the induction coil is connected with a driving device, the driving device is connected with the arc extinguishing cavity, and the driving device can send arc extinguishing medium into the arc extinguishing cavity. When lightning strikes the arrester, the discharge gap discharges the lightning surge. The energy-taking coil takes energy from lightning surge and provides electric energy and starting signals for the driving device. The driving device drives the arc extinguishing medium to actively extinguish the power frequency arc between the discharge gaps, and finally, the dual functions of lightning surge relief and power frequency arc extinction are realized. The invention has simple structure and good universality, and solves the problem that the power frequency arc cannot be extinguished after the conventional gap type lightning arrester breaks down.
Description
Technical Field
The invention relates to the field of line lightning protection devices, in particular to a line lightning arrester.
Background
The tripping accident caused by lightning occupies a large proportion in the tripping accident of the power transmission line, and aiming at the lightning accident threat faced by the power transmission line, the tripping rate of the line is generally reduced by adopting a mode of installing a lightning arrester and the like. Conventional lightning arresters are divided into gap type lightning arresters and zinc oxide lightning arresters, the former cannot extinguish power frequency freewheels brought after gap breakdown, the conventional lightning arresters are applied independently, and the latter have the problems of small current passing capability, easy aging of key elements, leakage current, high manufacturing cost and the like. Particularly, in some special areas, such as a peninsula area in the south of the Rauzhou, the lightning current amplitude distribution is abnormally high, the number of times of back striking is large, and the conventional lightning arrester cannot ensure the safe and stable operation of the circuit. Therefore, the field of lightning safety of the power transmission line lacks a novel lightning arrester capable of overcoming the defects.
Disclosure of Invention
Aiming at the problems of the existing lightning arrester, the invention provides a line lightning arrester, which realizes the dual functions of lightning surge relief and power frequency arc extinction.
The invention adopts the following technical scheme:
a line arrester comprises an arc extinguishing cavity, and when lightning strikes the arrester, power frequency electric arcs in the arc extinguishing cavity are extinguished by utilizing lightning surge energy.
Preferably, the material of the arc extinguishing cavity is resin, silicon rubber, an epoxy plate, a bakelite plate, a diphenyl ether plate or an organic silicon plate.
Preferably, a ground side discharge electrode and a high voltage side discharge electrode are arranged in the arc extinguishing chamber in a vertically opposite manner, and a discharge gap is formed between the ground side discharge electrode and the high voltage side discharge electrode.
Preferably, the high-voltage side discharge electrode is connected with the high-voltage wire through a first wire, and the ground side discharge electrode is connected with the tower bracket through a second wire.
Preferably, the discharge gap discharges the lightning surge when the lightning strikes the arrester.
Preferably, an energy taking coil is arranged on the first wire, the energy taking coil is connected with a driving device, the driving device is connected with the arc extinguishing cavity, and the driving device can send arc extinguishing medium into the arc extinguishing cavity.
Preferably, the energy-taking coil takes energy from lightning surge to provide electric energy and a starting signal for the driving device.
Preferably, the induction coil extracts energy from the lightning surge and provides power and a start signal for the drive means.
Preferably, the energy-taking coil comprises a differential loop induction coil, an electric storage capacitor, a voltage stabilizing isolation circuit and a protection and regulation circuit, and can convert lightning surge into direct current.
Preferably, the arc extinguishing action of the driving device for releasing the arc extinguishing medium is triggered by lightning surge, and the reaction time is shorter than the tripping relay protection setting time of the power transmission system.
Preferably, the extinguishing medium is oil having good arc extinguishing characteristics.
Preferably, the oil is transformer oil No. 25 or transformer oil No. 40.
Preferably, the arc extinguishing medium is air.
Preferably, the arc extinguishing medium is sulfur hexafluoride.
The invention has the beneficial effects that:
according to the invention, the lightning surge energy discharged after the breakdown of the discharge gap is utilized to trigger the driving device to complete arc extinguishing work, so that the trouble that the power frequency arc cannot be extinguished after the breakdown of the conventional gap type lightning arrester is solved, the dual functions of the lightning surge discharge and the power frequency arc extinction are realized, the current passing capability is high, the cost is low, and the effect is good.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the structure of a line arrester.
Fig. 2 is a schematic diagram of the line arrestor implementation.
Fig. 3 is a schematic diagram of a differential loop induction coil.
Fig. 4 is a schematic diagram of the energy-extracting coil composition.
Fig. 5 is a multi-grid arc extinguishing structure.
Fig. 6 is a multi-segment microporous arc extinguishing structure.
Fig. 7 is a path bending arc extinguishing structure.
1. The high-voltage power supply comprises a tower support, 2, a high-voltage wire, 3, an arc extinguishing cavity, 4, a grounding side discharge electrode, 5, a high-voltage side discharge electrode, 6, a first wire, 7, a second wire, 8, an energy taking coil, 9 and a driving device.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Example 1
Referring to fig. 1 to 5, a line arrester is installed between a tower bracket 1 and a high voltage wire 2.
The line arrester comprises an arc extinguishing chamber 3, and when lightning strikes the arrester, the power frequency electric arc in the arc extinguishing chamber is extinguished by utilizing the energy of lightning surge.
The arc extinguishing chamber is beneficial to the internal structure of arc extinction, as shown in fig. 5, and is internally provided with a multi-grid structure.
The multi-grid arc extinguishing structure utilizes multi-metal grids to physically cut the arc, and is characterized in that a physical arc channel is stretched and rapidly cooled.
The arc extinguishing chamber is provided with a grounding side discharge electrode 4 and a high voltage side discharge electrode 5 which are vertically opposite to each other, and a discharge gap is formed between the grounding side discharge electrode and the high voltage side discharge electrode.
The arc extinguishing cavity is made of resin, silicon rubber, epoxy board, bakelite board, diphenyl ether board, organic silicon board, etc.
The high-voltage side discharge electrode 5 is connected to the high-voltage wire 2 via a first wire 6, and the ground side discharge electrode 4 is connected to the tower bracket 1 via a second wire 7.
An energy taking coil 8 is arranged on the first lead 6, the energy taking coil 8 is connected with a driving device 9, and the driving device is connected with the arc extinguishing cavity.
The energy-taking coil takes energy from lightning surge and provides electric energy and starting signals for the driving device.
The energy-taking coil comprises a differential loop induction coil, a storage capacitor, a voltage stabilizing isolation circuit and a protection and regulation circuit, and has the main functions of converting lightning surge into direct current, wherein I represents lightning current as shown in figure 3. The differential ring induction coil has a multi-ring multi-layer structure, is arranged near the high-voltage side discharge electrode in a non-contact mode, and achieves larger electricity taking efficiency under the condition of not disassembling the line down lead.
According to the parameter labeling of fig. 4, when the number of layers of the differential loop energy-taking coil is N, the induced electromotive force generated by the differential loop energy-taking coil is:
wherein the distance between the left and right sides of the coil and the lightning current channel is a respectively i 、b i The coil center is h, mu from the lead wire 0 Is vacuum permeability, mu 0 ＝4π×10 -7 H/m。
M is the mutual inductance between the wire loops, and the formula is as follows.
Where S is the integral coil area.
The driving device can send the arc extinguishing medium into the arc extinguishing cavity.
The arc extinguishing medium is oil with good arc extinguishing characteristics.
The oil is 25# transformer oil or 40# transformer oil.
The process of the lightning arrester for realizing the line lightning protection function is similar to that of a conventional lightning arrester, the insulation strength of the lightning arrester is smaller than that of a line insulator, when lightning stroke occurs, lightning surge preferentially leaks into the ground from the lightning arrester, and line tripping accidents caused by breakdown of the line insulator are prevented. The grounding side discharge electrode and the high voltage side discharge electrode of the lightning arrester form a discharge gap, and when lightning overvoltage occurs, the discharge gap is used for discharging lightning surge temporarily, so that the lightning protection function of the conventional gap type lightning arrester is realized. And also have the ability that utilizes the lightning surge energy to extinguish the power frequency electric arc, after the discharge gap breaks down, induction coil obtains energy through mutual inductance principle from the lightning surge, provides electric energy and start signal for drive arrangement, drive arrangement release have good electric arc extinguish characteristic oil actively extinguish the power frequency electric arc between the discharge gap, finally realize the dual function that lightning surge is released and power frequency electric arc extinguished.
The time for releasing the arc extinguishing medium by the driving device is smaller than the tripping relay protection setting time of the power transmission system.
Example 2
Referring to fig. 1 to 4 and 6, a line arrester is installed between a tower bracket 1 and a high voltage wire 2.
The line arrester comprises an arc extinguishing chamber 3, and when lightning strikes the arrester, the power frequency electric arc in the arc extinguishing chamber is extinguished by utilizing the energy of lightning surge.
The arc extinguishing chamber is favorable for the internal structure of arc extinction, and as shown in fig. 6, the arc extinguishing chamber is internally provided with a multi-section micropore structure.
The multistage micropore arc extinguishing structure is used for carrying out sectional treatment on the structure of the arc discharge main channel, so that the main arc is cut into a plurality of sections, then arc extinguishing mediums are used for independently blowing arcs of small sections, and the arc extinguishing difficulty is greatly reduced.
The arc extinguishing chamber is provided with a grounding side discharge electrode 4 and a high voltage side discharge electrode 5 which are vertically opposite to each other, and a discharge gap is formed between the grounding side discharge electrode and the high voltage side discharge electrode.
The arc extinguishing cavity is made of resin, silicon rubber, epoxy board, bakelite board, diphenyl ether board, organic silicon board, etc.
The high-voltage side discharge electrode 5 is connected to the high-voltage wire 2 via a first wire 6, and the ground side discharge electrode 4 is connected to the tower bracket 1 via a second wire 7.
An energy taking coil 8 is arranged on the first lead 6, the energy taking coil 8 is connected with a driving device 9, and the driving device is connected with the arc extinguishing cavity.
The energy-taking coil takes energy from lightning surge and provides electric energy and starting signals for the driving device.
The energy-taking coil comprises a differential loop induction coil, a storage capacitor, a voltage stabilizing isolation circuit and a protection and regulation circuit, and has the main function of converting lightning surge into direct current, as shown in figure 3. The differential ring induction coil has a multi-ring multi-layer structure, is arranged near the high-voltage side discharge electrode in a non-contact mode, and achieves larger electricity taking efficiency under the condition of not disassembling the line down lead.
According to the parameter labeling of fig. 4, when the number of layers of the differential loop energy-taking coil is N, the induced electromotive force generated by the differential loop energy-taking coil is:
wherein the distance between the left and right sides of the coil and the lightning current channel is a respectively i 、b i The coil center is h, mu from the lead wire 0 Is vacuum permeability, mu 0 ＝4π×10 -7 H/m。
M is the mutual inductance between the wire loops, and the formula is as follows.
Where S is the integral coil area.
The driving device can send the arc extinguishing medium into the arc extinguishing cavity.
The arc extinguishing medium is sulfur hexafluoride.
The process of the lightning arrester for realizing the line lightning protection function is similar to that of a conventional lightning arrester, the insulation strength of the lightning arrester is smaller than that of a line insulator, when lightning stroke occurs, lightning surge preferentially leaks into the ground from the lightning arrester, and line tripping accidents caused by breakdown of the line insulator are prevented. The grounding side discharge electrode and the high voltage side discharge electrode of the lightning arrester form a discharge gap, and when lightning overvoltage occurs, the discharge gap is used for discharging lightning surge temporarily, so that the lightning protection function of the conventional gap type lightning arrester is realized. And also have the ability that utilizes lightning surge energy to extinguish power frequency electric arc, after the discharge gap breaks down, induction coil obtains energy through mutual inductance principle from the lightning surge, provides electric energy and start signal for drive arrangement, drive arrangement release air initiative extinction power frequency electric arc between the discharge gap, finally realize the dual function that lightning surge was released and power frequency electric arc extinguished.
The time for releasing the arc extinguishing medium by the driving device is smaller than the tripping relay protection setting time of the power transmission system.
Example 3
Referring to fig. 1 to 4 and 7, a line arrester is installed between a tower bracket 1 and a high voltage wire 2.
The line arrester comprises an arc extinguishing chamber 3, and when lightning strikes the arrester, the power frequency electric arc in the arc extinguishing chamber is extinguished by utilizing the energy of lightning surge.
The arc extinguishing chamber has an internal structure which is beneficial to the extinction of the arc, and as shown in fig. 7, the arc extinguishing chamber has a path bending structure.
The path bending arc extinguishing structure artificially changes the arc form by bending the arc discharge main channel, so that the arc form is changed from the initial near linear deformation to the bending form, and arc extinguishing medium blows arcs to arc bending nodes from different directions, thereby improving the arc extinguishing capability.
The arc extinguishing chamber is provided with a grounding side discharge electrode 4 and a high voltage side discharge electrode 5 which are vertically opposite to each other, and a discharge gap is formed between the grounding side discharge electrode and the high voltage side discharge electrode.
The arc extinguishing cavity is made of resin, silicon rubber, epoxy board, bakelite board, diphenyl ether board, organic silicon board, etc.
The high-voltage side discharge electrode 5 is connected to the high-voltage wire 2 via a first wire 6, and the ground side discharge electrode 4 is connected to the tower bracket 1 via a second wire 7.
An energy taking coil 8 is arranged on the first lead 6, the energy taking coil 8 is connected with a driving device 9, and the driving device is connected with the arc extinguishing cavity.
The energy-taking coil takes energy from lightning surge and provides electric energy and starting signals for the driving device.
The energy-taking coil comprises a differential loop induction coil, a storage capacitor, a voltage stabilizing isolation circuit and a protection and regulation circuit, and has the main function of converting lightning surge into direct current, as shown in figure 3. The differential ring induction coil has a multi-ring multi-layer structure, is arranged near the high-voltage side discharge electrode in a non-contact mode, and achieves larger electricity taking efficiency under the condition of not disassembling the line down lead.
According to the parameter labeling of fig. 4, when the number of layers of the differential loop energy-taking coil is N, the induced electromotive force generated by the differential loop energy-taking coil is:
wherein the distance between the left and right sides of the coil and the lightning current channel is a respectively i 、b i The coil center is h, mu from the lead wire 0 Is vacuum permeability, mu 0 ＝4π×10 -7 H/m。
M is the mutual inductance between the wire loops, and the formula is as follows.
Where S is the integral coil area.
The driving device can send the arc extinguishing medium into the arc extinguishing cavity.
The arc extinguishing medium is air.
The process of the lightning arrester for realizing the line lightning protection function is similar to that of a conventional lightning arrester, the insulation strength of the lightning arrester is smaller than that of a line insulator, when lightning stroke occurs, lightning surge preferentially leaks into the ground from the lightning arrester, and line tripping accidents caused by breakdown of the line insulator are prevented. The grounding side discharge electrode and the high voltage side discharge electrode of the lightning arrester form a discharge gap, and when lightning overvoltage occurs, the discharge gap is used for discharging lightning surge temporarily, so that the lightning protection function of the conventional gap type lightning arrester is realized. And the device also has the capability of extinguishing the power frequency arc by utilizing the energy of the lightning surge, after the discharge gap breaks down, the induction coil acquires the energy from the lightning surge through the mutual inductance principle, provides electric energy and starting signals for the driving device, releases sulfur hexafluoride to actively extinguish the power frequency arc between the discharge gaps, and finally realizes the dual functions of lightning surge discharge and power frequency arc extinction.
The time for releasing the arc extinguishing medium by the driving device is smaller than the tripping relay protection setting time of the power transmission system.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (5)
1. The line lightning arrester is characterized by comprising an arc extinguishing cavity, wherein when lightning strikes the lightning arrester, a power frequency arc in the arc extinguishing cavity is extinguished by utilizing the energy of lightning surge;
the arc extinguishing cavity is made of resin, silicon rubber, an epoxy plate, a bakelite plate, a diphenyl ether plate or an organic silicon plate;
a grounding side discharge electrode and a high-voltage side discharge electrode are arranged in the arc extinguishing cavity in a vertically opposite mode, and a discharge gap is formed between the grounding side discharge electrode and the high-voltage side discharge electrode;
the high-voltage side discharge electrode is connected with the high-voltage wire through a first wire, and the grounding side discharge electrode is connected with the tower bracket through a second wire;
when lightning strikes the arrester, the discharge gap discharges the lightning surge;
an energy taking coil is arranged on the first lead, the energy taking coil is connected with a driving device, the driving device is connected with the arc extinguishing cavity, and the driving device can send arc extinguishing medium into the arc extinguishing cavity;
the energy-taking coil acquires energy from lightning surge and provides electric energy and a starting signal for the driving device;
the energy-taking coil comprises a differential ring induction coil, an electricity storage capacitor, a voltage stabilizing isolation circuit and a protection and regulation circuit, and can convert lightning surge into direct current;
the arc extinguishing action of the driving device for releasing the arc extinguishing medium is triggered by lightning surge, and the reaction time is less than the tripping relay protection setting time of the power transmission system.
2. A line arrester according to claim 1, characterized in that the extinguishing medium is oil with good arc extinguishing properties.
3. A line arrester according to claim 2, wherein the oil is transformer oil No. 25 or transformer oil No. 40.
4. A line arrester according to claim 1, characterized in that the extinguishing medium is air.
5. A line arrester according to claim 1, characterized in that the extinguishing medium is sulphur hexafluoride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110133361.3A CN114843882B (en) | 2021-02-01 | 2021-02-01 | Line lightning arrester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110133361.3A CN114843882B (en) | 2021-02-01 | 2021-02-01 | Line lightning arrester |
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| CN114843882A CN114843882A (en) | 2022-08-02 |
| CN114843882B true CN114843882B (en) | 2023-10-13 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202003781U (en) * | 2011-04-12 | 2011-10-05 | 王巨丰 | Constrained space jet gas arc-extinguishing lightning-protection gap device for 10-35 kV overhead transmission line |
| CN102486954A (en) * | 2010-12-02 | 2012-06-06 | 王巨丰 | Multi-interspace self-expanding strong-airflow arc extinguishing lightning protection device |
| CN110768231A (en) * | 2018-07-25 | 2020-02-07 | 中国石油化工股份有限公司 | Arc extinguishing device and method for power transmission and distribution line |
-
2021
- 2021-02-01 CN CN202110133361.3A patent/CN114843882B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486954A (en) * | 2010-12-02 | 2012-06-06 | 王巨丰 | Multi-interspace self-expanding strong-airflow arc extinguishing lightning protection device |
| CN202003781U (en) * | 2011-04-12 | 2011-10-05 | 王巨丰 | Constrained space jet gas arc-extinguishing lightning-protection gap device for 10-35 kV overhead transmission line |
| CN110768231A (en) * | 2018-07-25 | 2020-02-07 | 中国石油化工股份有限公司 | Arc extinguishing device and method for power transmission and distribution line |
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| CN114843882A (en) | 2022-08-02 |
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