CN107481823B - Lightning-proof tripping self-arc-extinguishing parallel gap system for power distribution network - Google Patents
Lightning-proof tripping self-arc-extinguishing parallel gap system for power distribution network Download PDFInfo
- Publication number
- CN107481823B CN107481823B CN201710855575.5A CN201710855575A CN107481823B CN 107481823 B CN107481823 B CN 107481823B CN 201710855575 A CN201710855575 A CN 201710855575A CN 107481823 B CN107481823 B CN 107481823B
- Authority
- CN
- China
- Prior art keywords
- extinguishing
- arc
- self
- parallel gap
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- 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
- H01B17/48—Means for obtaining improved distribution of voltage; Protection against arc discharges over chains or other serially-arranged insulators
-
- 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
- H01T1/04—Means for extinguishing arc using magnetic blow-out
-
- 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
- H01T4/08—Overvoltage arresters using spark gaps structurally associated with protected apparatus
-
- 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
- H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention overcomes the defect of the prior line lightning protection measures and provides a novel power distribution network lightning protection tripping self-extinguishing arc parallel gap system. The invention comprises a voltage detection unit, a control unit, two metal electrodes and a self-extinguishing unit. The two metal electrodes are respectively and electrically connected with two ends of the insulator, and the voltage detection unit is arranged on the metal electrodes. The signal output end of the voltage detection unit is connected with the signal input end of the control unit, and the signal output end of the control unit is connected with the self-extinguishing unit. The parallel gap adjusting device is wide in application range, the distance of the parallel gap can be adjusted for different distribution lines, and the lines with different relay protection parameters can be flexibly adjusted. Second, the energy of the arc extinction comes from lightning, and no additional energy is required to be taken from the line or otherwise. Finally, the switching time of the coil can be flexibly adjusted according to the different lightning overvoltage, so that the tripping of the circuit is not caused while the releasing of the lightning overvoltage is ensured.
Description
Technical Field
The invention relates to the field of lightning protection tripping, in particular to a self-arc-extinguishing parallel gap system for lightning protection tripping of a power distribution network.
Background
With the deep progress of the construction of the national intelligent power grid, power supply enterprises and power users have higher requirements on the power supply safety and reliability of the power distribution network. Because the distribution network is directly related to the quality and economic benefits of the power supply. Lightning is taken as a powerful natural disaster which cannot be restrained, not only threatens the life safety of human beings, but also causes equipment such as power transmission and distribution lines, electrical equipment and the like to be possibly damaged, so that reasonable lightning protection measures are taken to have important significance.
The measures such as installation of lightning conductor, installation of lightning arrester, installation of parallel protection gap and the like which are frequently adopted by the line lightning protection measures can meet the basic requirements of lightning protection. However, the application of the lightning conductor to the wiring is limited to a certain extent, and the lightning conductor is installed only within a range of 1 to 2 km from and to the line. The lightning arrester can meet the requirement of releasing lightning, however, the discharging process is completely uncontrolled, and when the lightning arrester is damaged, the phenomenon of current leakage exists. The parallel gap is formed by installing a pair of metal electrodes in parallel at two ends of the insulator string to form a protection gap, and the gap can be discharged preferentially under the impact of direct lightning strike or induced lightning current, so that the insulator string is protected from arc flashover, and the circuit has no permanent fault. But the lightning trip-out rate of the line is increased, and the power frequency arc needs to be cut off through automatic reclosing.
Disclosure of Invention
The invention overcomes the defect of the prior line lightning protection measures and provides a novel power distribution network lightning protection tripping self-extinguishing arc parallel gap system. The parallel gap adjusting device is wide in application range, the distance of the parallel gap can be adjusted for different distribution lines, and the lines with different relay protection parameters can be flexibly adjusted. Second, the energy of the arc extinction comes from lightning, and no additional energy is required to be taken from the line or otherwise. Finally, the switching time of the coil can be flexibly adjusted according to the different lightning overvoltage, so that the line tripping is not caused while the lightning overvoltage is released fastest.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides a power distribution network lightning protection tripping operation self-extinguishing arc parallel gap system, which comprises a voltage detection unit, a control unit, two metal electrodes and a self-extinguishing arc unit,
the signal output end of the voltage detection unit is connected with the signal input end of the control unit;
the two metal electrodes are respectively and electrically connected with the two ends of the insulator;
the self-arc extinguishing unit comprises two magnetic blowing coils, an arc extinguishing grid cover, an arc extinguishing grid and a metal rod, wherein,
the two magnetic blowing coils are respectively arranged on the two metal electrodes, and the magnetic blowing coils are electrically connected with the metal electrodes;
the bottom end of the metal rod is grounded;
the arc extinguishing gate cover is fixedly connected to the metal rod;
the arc-extinguishing gate is arranged on the inner side of the arc-extinguishing gate cover, and the metal contact of the arc-extinguishing gate is fixed towards the metal electrode.
The signal output end of the control unit is connected with the magnetic blowing coil;
the voltage detection unit is arranged on the metal electrode.
The working process of the invention is as follows:
when a lightning accident occurs, the two metal electrodes are connected with the two ends of the insulator in parallel to form a parallel gap, and the parallel gap is earlier than the insulator to generate arc flashover. The voltage detection unit arranged on the metal electrode detects arc flashover generated by the metal electrode and transmits a detection signal to the control unit. The control unit controls the magnetic blow-off coil to be put into use, and the magnetic blow-off coil generates a magnetic field to elongate the electric arc by utilizing energy provided by the flashover current. The arc moves away from the insulator and enters the arc extinguishing grid. The arc is divided into several segments and the arc is extinguished. The arc-extinguishing gate cover shields the electric arc entering the arc-extinguishing gate and prevents the electric arc from going forward in the arc-extinguishing gate.
In a preferred embodiment, the signal output of the voltage detection unit is connected to the signal input of the control unit by means of an optical output element in an optically isolated manner. The use of a photo-electric isolation connection prevents an arc flashover from entering the control unit, resulting in damage to the control unit.
In a preferred embodiment, the control unit comprises a light receiving element, a microprocessor and a switching unit, wherein,
the light receiving element is used as a signal input end of the control unit, and a signal output end of the light receiving element is electrically connected with the microprocessor;
the microprocessor is electrically connected with the switch unit.
In a preferred embodiment, the microprocessor is a single-chip microcomputer. The singlechip has the characteristics of low power consumption and low cost.
In a preferred scheme, the switch unit comprises a thyristor, a control electrode of the thyristor is electrically connected with the microprocessor, an anode of the thyristor is electrically connected with one end of the magnetic blowing coil, and a cathode of the thyristor is electrically connected with the other end of the magnetic blowing coil. The thyristor can rapidly control the on/off state through the signal of the singlechip, so that the magnetic blowing coil is immediately put into use after the metal electrode generates arc flashover, and the arc extinguishing effect is achieved.
In a preferred embodiment, the two magnetic blowout coils are wound around the two metal electrodes, respectively. By flowing the flashover current of the metal electrode, a magnetic field is generated to achieve the arc extinguishing effect.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
1. the metal electrode distance adjusting device is wide in application range, and can adjust the distance of the metal electrode for different distribution lines and flexibly adjust different relay protection parameters.
2. The energy of the magnetic blow-out is from the lightning, without the need to additionally draw energy from the line or in other ways.
3. The switching time of the magnetic blowing coil is flexibly adjusted according to the different lightning overvoltage, so that the line tripping is not caused while the lightning overvoltage is released fastest.
Drawings
Fig. 1 is a structural connection diagram of an embodiment of the present invention.
Description of the reference numerals: 1. the device comprises an insulator, a magnetic blowing coil, a metal electrode, an arc extinguishing gate cover, an arc extinguishing gate, a control unit, a voltage detection unit and a metal rod, wherein the insulator is arranged in the magnetic blowing coil, the metal electrode is arranged in the magnetic blowing coil, the arc extinguishing gate cover is arranged in the magnetic blowing coil, the control unit is arranged in the magnetic blowing coil, the voltage detection unit is arranged in the magnetic blowing coil, and the voltage detection unit is arranged in the magnetic blowing coil.
Fig. 2 is a connection diagram of a control unit structure according to an embodiment of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions;
it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, a lightning strike-proof tripping self-extinguishing arc parallel gap system of a power distribution network comprises a voltage detection unit 7, a light output element, a control unit 6, two metal electrodes 3, two magnetic blowing coils 2, an arc extinguishing grid cover 4, an arc extinguishing grid 5 and a metal rod 8, wherein,
the control unit 6 comprises a light receiving element, a single chip microcomputer and a thyristor, as shown in fig. 2.
The connection relation of the components is as follows:
the voltage detection unit 7 is arranged on the metal electrode 3;
the signal output end of the voltage detection unit 7 is electrically connected with the signal input end of the light output element;
the signal output end of the light output element is connected with the signal input end of the light receiving element in a photoelectric isolation way;
the signal output end of the light receiving element is electrically connected with the singlechip;
the control electrode of the thyristor is electrically connected with the single chip microcomputer, the anode of the thyristor is electrically connected with one end of the magnetic blowing coil 2, and the cathode of the thyristor is electrically connected with the other end of the magnetic blowing coil 2;
the two magnetic blowing coils 2 are respectively wound on the two metal electrodes 3;
the two metal electrodes 3 are respectively and electrically connected with the two ends of the insulator 1;
the bottom end of the metal rod 8 is grounded;
the arc extinguishing gate cover 4 is fixedly connected to the metal rod 8;
the arc extinguishing grid 5 is arranged on the inner side of the arc extinguishing grid cover 4, and the metal contact of the arc extinguishing grid 5 is fixed towards the metal electrode 3.
The embodiment specifically implements the following steps:
when a lightning accident occurs, the two metal electrodes 3 and the two ends of the insulator 1 are connected in parallel to form a parallel gap, and the parallel gap is earlier than the insulator to generate arc flashover. The voltage detection unit 7 arranged on the metal electrode 3 detects arc flashover generated by the metal electrode 3, and transmits detection signals to the singlechip through photoelectric isolation connection. The singlechip controls the thyristor to determine the input time of the magnetic blowing coil. When the thyristor is closed, the magnetic blow-off coil forms a complete loop, and the arc is elongated by generating a magnetic field using the energy provided by the flashover current. The arc moves away from the insulator 1 and into the arc chute 5. The arc is divided into several segments and the arc is extinguished. The arc chute boot 4 shields the arc entering the arc chute 5 from continuing within the arc chute 5.
The same or similar reference numerals correspond to the same or similar components;
the terms describing the positional relationship in the drawings are merely illustrative, and are not to be construed as limiting the present patent;
it is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (6)
1. The utility model provides a power distribution network lightning protection tripping operation self-extinguishing arc parallel gap system, which is characterized in that the system comprises a voltage detection unit, a control unit, two metal electrodes and a self-extinguishing arc unit, wherein,
the signal output end of the voltage detection unit is connected with the signal input end of the control unit;
the two metal electrodes are respectively and electrically connected with the two ends of the insulator;
the self-arc extinguishing unit comprises two magnetic blowing coils, an arc extinguishing grid cover, an arc extinguishing grid and a metal rod, wherein,
the two magnetic blowing coils are respectively arranged on the two metal electrodes, and the magnetic blowing coils are electrically connected with the metal electrodes;
the bottom end of the metal rod is grounded;
the arc extinguishing gate cover is fixedly connected to the metal rod;
the arc-extinguishing gate is arranged on the inner side of the arc-extinguishing gate cover, and the metal contact of the arc-extinguishing gate is fixed towards the metal electrode;
the signal output end of the control unit is connected with the magnetic blowing coil;
the voltage detection unit is arranged on the metal electrode.
2. The lightning protection tripping self-extinguishing parallel gap system for power distribution network according to claim 1, wherein the signal output end of the voltage detection unit is connected with the signal input end of the control unit in a photoelectric isolation way through an optical output element.
3. The lightning protection trip self-extinguishing parallel gap system of power distribution network according to claim 2, wherein the control unit comprises a light receiving element, a microprocessor and a switch unit, wherein,
the light receiving element is used as a signal input end of the control unit, and a signal output end of the light receiving element is electrically connected with the microprocessor;
the microprocessor is electrically connected with the switch unit.
4. A lightning protection tripping self-extinguishing parallel gap system for a power distribution network according to claim 3, wherein the microprocessor is a single chip microcomputer.
5. The lightning protection tripping self-extinguishing parallel gap system for power distribution network according to claim 3 or 4, wherein the switching unit comprises a thyristor, a control electrode of the thyristor is electrically connected with the microprocessor, an anode of the thyristor is electrically connected with one end of the magnetic blowing coil, and a cathode of the thyristor is electrically connected with the other end of the magnetic blowing coil.
6. The lightning protection tripping self-extinguishing parallel gap system for power distribution network according to claim 5, wherein the two magnetic blowing coils are respectively wound on the two metal electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710855575.5A CN107481823B (en) | 2017-09-20 | 2017-09-20 | Lightning-proof tripping self-arc-extinguishing parallel gap system for power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710855575.5A CN107481823B (en) | 2017-09-20 | 2017-09-20 | Lightning-proof tripping self-arc-extinguishing parallel gap system for power distribution network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107481823A CN107481823A (en) | 2017-12-15 |
| CN107481823B true CN107481823B (en) | 2023-08-01 |
Family
ID=60587121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710855575.5A Active CN107481823B (en) | 2017-09-20 | 2017-09-20 | Lightning-proof tripping self-arc-extinguishing parallel gap system for power distribution network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107481823B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110854681B (en) * | 2019-11-02 | 2021-06-22 | 绿能电力科技有限公司 | Power electrical transformer with lightning protection |
| CN113054534B (en) * | 2021-02-24 | 2022-04-15 | 云南电网有限责任公司德宏供电局 | Method for improving arc extinguishing efficiency of multi-cavity structure by using magnetic field |
| CN114744488B (en) * | 2022-03-17 | 2023-09-29 | 广东电网有限责任公司 | Arc blowing type lightning protection device for power distribution network |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000834A (en) * | 2006-12-22 | 2007-07-18 | 西安交通大学 | Current-limiting arc-control device of medium-voltage large current DC circuit breaker |
| CN102263376A (en) * | 2010-05-25 | 2011-11-30 | 王巨丰 | Gas arc extinguishing apparatus |
| CN204144200U (en) * | 2014-08-17 | 2015-02-04 | 中国船舶重工集团公司第七一二研究所 | DC circuit breaker magnetic blow-out device |
| WO2015070517A1 (en) * | 2013-11-13 | 2015-05-21 | 王巨丰 | Multi-gap self-inflating strong-airflow protective device for lightning protection by longitudinal-blast arc extinguishing |
| CN207149330U (en) * | 2017-09-20 | 2018-03-27 | 广东电网有限责任公司湛江供电局 | A kind of anti-lightning strike tripping operation self arc parallel connection gaps system of power distribution network |
-
2017
- 2017-09-20 CN CN201710855575.5A patent/CN107481823B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101000834A (en) * | 2006-12-22 | 2007-07-18 | 西安交通大学 | Current-limiting arc-control device of medium-voltage large current DC circuit breaker |
| CN102263376A (en) * | 2010-05-25 | 2011-11-30 | 王巨丰 | Gas arc extinguishing apparatus |
| WO2015070517A1 (en) * | 2013-11-13 | 2015-05-21 | 王巨丰 | Multi-gap self-inflating strong-airflow protective device for lightning protection by longitudinal-blast arc extinguishing |
| CN204144200U (en) * | 2014-08-17 | 2015-02-04 | 中国船舶重工集团公司第七一二研究所 | DC circuit breaker magnetic blow-out device |
| CN207149330U (en) * | 2017-09-20 | 2018-03-27 | 广东电网有限责任公司湛江供电局 | A kind of anti-lightning strike tripping operation self arc parallel connection gaps system of power distribution network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107481823A (en) | 2017-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102486954B (en) | Multi-interspace self-expanding strong-airflow arc extinguishing lightning protection device | |
| CN201478816U (en) | Air blowing and variable gap arc extinguishing lightning protection gap device | |
| CN107481823B (en) | Lightning-proof tripping self-arc-extinguishing parallel gap system for power distribution network | |
| CN102856021A (en) | Follow current-free arc lightening-protection gap protection device | |
| CN102263376A (en) | Gas arc extinguishing apparatus | |
| CN202003781U (en) | Constrained space jet gas arc-extinguishing lightning-protection gap device for 10-35 kV overhead transmission line | |
| CN108023275B (en) | Outdoor arrester with adjustable gap | |
| CN101159368A (en) | Air blast arc-quenching lightning protection inter space device | |
| CN102737795A (en) | 10-35kV overhead transmission line constraint space injection gas arc extinguishing lightning protection gap apparatus | |
| CN202093903U (en) | Constraint space injection air flow arc extinguishing lightning protection gap device | |
| CN202651781U (en) | Neutral point integrated grounding complete device | |
| CN209785676U (en) | novel air gap lightning arrester | |
| CN112117746B (en) | Method and system for eliminating span central flashover and power frequency insulation strength loss | |
| CN207149330U (en) | A kind of anti-lightning strike tripping operation self arc parallel connection gaps system of power distribution network | |
| CN105610127A (en) | Water flow protective gap and lightning arrester parallel connection protection system for 110kV transformer neutral point | |
| CN102592757B (en) | Constraint space jet-stream wind arc extinguishing lightning protection clearance apparatus | |
| CN209184242U (en) | It is a kind of to dispatch controllable power network neutral point earthing or grounding means | |
| CN207664440U (en) | A kind of outdoor arrester of adjustable clearance | |
| CN202042294U (en) | Multi-gap self-expansion strong airflow arc extinction lightning-protection protecting device | |
| CN201163703Y (en) | Strong gas flow arc extinguishing lightning protection clearance apparatus | |
| CN103474183B (en) | The even pressure type degree of depth suppresses power frequency continued flow electric arc lightning protection inter space device | |
| CN207265416U (en) | A kind of 10kV exchanges overhead transmission line arc blowing type lightning protection device | |
| CN109038531A (en) | It is a kind of to dispatch controllable power network neutral point earthing or grounding means and its control method | |
| CN112117070B (en) | Full-span insulation matching method and device for eliminating span central direct flashover | |
| CN203595776U (en) | Lightning stroke fault protection and monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |