CN201417654Y - Strong thunder load arrester for overhead transmission line - Google Patents
Strong thunder load arrester for overhead transmission line Download PDFInfo
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- CN201417654Y CN201417654Y CN2009200855911U CN200920085591U CN201417654Y CN 201417654 Y CN201417654 Y CN 201417654Y CN 2009200855911 U CN2009200855911 U CN 2009200855911U CN 200920085591 U CN200920085591 U CN 200920085591U CN 201417654 Y CN201417654 Y CN 201417654Y
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Abstract
The utility model provides a strong thunder load arrester for an overhead transmission line. The strong thunder load arrester comprises an outer insulating cylinder (9) and a leading-out electrode connected with the outer insulating cylinder (9); a conductive spring (8), a gap unit, a transitional electrode (5) and a piezoresistor unit are installed in the cavity of the outer insulating cylinder from top to bottom; the gap unit is provided with a pair of gap electrodes (7) which are connected in series through a shunt resistor (6); the piezoresistor unit comprises a plurality of branch units connected in series, a low-voltage piezoresistive wafer (3) and an electrode slice (2) connected with the low-voltage piezoresistive wafer (3) in series are arranged in each branch unit, or a componentfor connecting an equalizing reactor (4) with the low-voltage piezoresistive wafer in parallel through the electrode slice is arranged; the two ends of the transitional electrode are respectively incontact with the electrode slices and the gap electrodes, so as to achieve the purpose of electric connection, connect the piezoresistor unit with the gap unit in series, and form an arrester body forrelieving the lightning current. The nominal discharge current value the arrester can bear is higher than 20kA, and the thunder endurance thereof is four to eight times of the thunder endurance of anordinary arrester.
Description
Technical field
The utility model relates to strong thunder and lightning load lightning arrester, particularly relates to the strong thunder and lightning load lightning arrester of a kind of 35kV of being used for and following electric pressure overhead transmission line.
Background technology
In the overhead transmission line of 35kV and following electric pressure, because the insulation level of circuit is not high, be struck by lightning because of lead easily or the line influence lightning overvoltage causes insulator arc-over, cause short circuit or fuse accident.For avoiding similar accident to produce, adopt modes such as insulator crossarm, increase creeping-increasing skirt to increase dielectric strength or increase lightning arrester over-voltage amplitude usually.
When adopting increase lightning arrester over-voltage amplitude to reduce short circuit accident, if choose the lightning arrester that nominal discharge current is 5kA by current respective standard or standard, practical experience shows, in southern area with more lightning activities or strong minefield, increase the technical indicator that lightning arrester does not have the operation of raising system, because the thunder and lightning load of lightning arrester is not enough, the maintenance workload and the investment for trnasforming urban land of lightning arrester have been increased on the contrary.Its reason is: in the overhead transmission line of 35kV and following electric pressure, for reducing investment outlay, transmission line does not have lightning conducter, and overhead transmission line may suffer direct lightning strike, and nominal discharge current is that the lightning arrester of 5kA damages because of bearing lightning current.
Therefore, be necessary at strong, the frequent characteristics of southern thunder and lightning, design the strong thunder and lightning load lightning arrester that a kind of nominal current is higher than 20kA, be applied in the overhead transmission line of 35kV and following electric pressure, when lead suffers direct lightning strike, lightning voltage on the restriction circuit, avoid causing short circuit or fuse accident, simultaneously, because the nominal discharge current level of lightning arrester improves, make it can bear corresponding thunder and lightning, avoid the damage of lightning arrester self, thereby reach the comparatively running technology index of the raising system of economy.
Summary of the invention
Technical problem to be solved in the utility model is: at present, be applied in Zinc-oxide piezoresistor in the lightning arrester of 35kV and following electric pressure and adopt the high voltage varistor of pressure sensitive voltage 4～5kV, nominal discharge current has only 5kA, the utility model provides a kind of overhead transmission line with strong thunder and lightning load lightning arrester, and this lightning arrester can be applied in the overhead transmission line of 35kV and following electric pressure and nominal discharge current can reach more than the 20kA.
The technical scheme that its technical problem that solves the utility model adopts is: comprise insulation urceolus, the extraction electrode, power spring, gap element and the piezo-resistance unit that link to each other with the insulation urceolus.In the inner chamber of insulation urceolus, power spring, gap element, transition electrode and piezo-resistance unit are installed from top to bottom, wherein: gap element is provided with a pair of clearance electrode, and they are connected by shunt resistance; The piezo-resistance unit is made up of a plurality of subdivisions that are connected in series, and in each subdivision, the electrode slice that is provided with the low voltage varistor sheet and connects with it perhaps is provided with by electrode slice the anti-parts in parallel with the low voltage varistor sheet of equal piezoelectricity.The two ends of described transition electrode reach the purpose that be electrically connected with clearance electrode by contacting with electrode slice respectively, are connected with gap element in the piezo-resistance unit, form the release main body of lightning current of lightning arrester.
The utility model compared with prior art, has following major advantage: the nominal discharge current value (this current value is higher than 20kA) that has improved lightning arrester greatly, its thunder and lightning ability to bear is 5 to 8 times of common lightning arrester, makes it can bear the thunder-strike current that may directly hit overhead wire.In the overhead transmission line of 35kV and following electric pressure, use, can avoid the short circuit that causes because of thunder and lightning or the generation of fuse accident, improve reliability of system operation.If having been built circuit, China south undergoes technological transformation, can not change respective design, only need the corresponding shaft tower of or often be struck by lightning circuit weak to install this lightning arrester additional in dielectric strength, can avoid the short circuit that causes because of thunder and lightning or the generation of fuse accident, both can improve the technical indicator of system stable operation, with respect to modes such as increasing insulator crossarm very big economic advantages arranged again.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the A-A cutaway view of Fig. 1.
Among the figure: 1. descend extraction electrode; 2. electrode slice; 3. low voltage varistor sheet; 4. all piezoelectricity is anti-; 5. transition electrode; 6. shunt resistance; 7. clearance electrode; 8. power spring; 9. insulation urceolus; 10. go up extraction electrode.
Embodiment
The strong thunder and lightning load lightning arrester that the utility model provides, its structure be as depicted in figs. 1 and 2: comprise insulation urceolus 9, the extraction electrode, power spring 8, gap element and the piezo-resistance unit that link to each other with insulation urceolus 9.In the inner chamber of insulation urceolus 9, power spring 8, gap element, transition electrode 5 and piezo-resistance unit are installed from top to bottom, wherein: gap element is provided with a pair of clearance electrode 7, and they are by shunt resistance 6 series connection; The piezo-resistance unit is made up of a plurality of subdivisions that are connected in series, and in each subdivision, is provided with the low voltage varistor sheet 3 and the electrode slice 2 of series connection with it, perhaps is provided with by electrode slice 2 parts that equal piezoelectricity anti-4 and low voltage varistor sheet 3 is in parallel.
The two ends of described transition electrode 5 reach the purpose that be electrically connected with clearance electrode 7 by contacting with electrode slice 2 respectively, are connected with gap element in the piezo-resistance unit, form the release main body of lightning current of lightning arrester.
Described low voltage varistor sheet 3, its pressure sensitive voltage≤2000V, nominal discharge current 〉=20kA.Low voltage varistor sheet 3 can be the soldering welding with being connected of electrode slice 2, also can utilize the conductivity of metal to contact connection.Low voltage varistor sheet 3 and the piezo-resistance unit that can satisfy system's working voltage requirement after electrode slice 2 is connected, such as: the pressure sensitive voltage that is applied in the lightning arrester of 10kV system should be not less than 18kV.
Described equal piezoelectricity anti-4 adopts resistor or high-voltage capacitor.All piezoelectricity anti-4 can be welded on the electrode slice 2.
Above-mentioned a pair of clearance electrode 7 forms gap element by shunt resistance 6 series connection, distance between the clearance electrode 7 determines after by experimental verification according to the working voltage of corresponding system and puncture voltage, such as: the clearance distance that is applied in the lightning arrester of 10kV system is about about 16mm.Described clearance electrode can be made by graphite or copper-tungsten material.
Described insulation urceolus 9 two ends are connected by bolt with extraction electrode 1 and last extraction electrode 10 respectively, form outer cover unit.The described outer cover unit lightning arrester of packing into is released after the main body of lightning current, following extraction electrode 1 reaches the purpose that is electrically connected with electrode slice 2 by contacting, last extraction electrode 10 reaches the purpose that be electrically connected with clearance electrode 7 by contacting by power spring 8, and the potential energy that utilizes power spring 8 to store guarantees that each device in the lightning arrester closely contacts.
The utility model is described in further detail below in conjunction with specific embodiment, but do not limit the utility model.
Embodiment 1: this lightning arrester is applied in 10kV overhead wire transmission line or transformer station, and low voltage varistor sheet 3 is selected the low voltage varistor sheet of diameter 52mm for use, its nominal varistor voltage 1000V, and nominal discharge current is greater than 30kA.By 18 low voltage varistor sheets 3 be composed in series the piezo-resistance unit, the pressure sensitive voltage of piezo-resistance unit is 18.4kV; Clearance electrode 7 adopts graphite material to make clearance distance 16.2mm, power-frequency sparkover voltage 26.7, impulse sparkover voltage 42kV.
Embodiment 2: except that clearance electrode 7 adopts the Cu alloy material of anti-electrolytic corrosion, other is identical with embodiment 1.
Claims (4)
1. an overhead transmission line is with strong thunder and lightning load lightning arrester, comprise insulation urceolus (9), the extraction electrode, power spring (8), gap element and the piezo-resistance unit that link to each other with insulation urceolus (9), it is characterized in that in the inner chamber of insulation urceolus (9), power spring (8), gap element, transition electrode (5) and piezo-resistance unit are installed from top to bottom, wherein: gap element is provided with a pair of clearance electrode (7), and they are connected by shunt resistance (6); The piezo-resistance unit is made up of a plurality of subdivisions that are connected in series, in each subdivision, the electrode slice (2) that is provided with low voltage varistor sheet (3) and connects with it perhaps is provided with by electrode slice (2) equal piezoelectricity anti-(4) and low voltage varistor sheet (3) parts in parallel; The two ends of described transition electrode (5) reach the purpose that be electrically connected with clearance electrode (7) by contacting with electrode slice (2) respectively, are connected with gap element in the piezo-resistance unit, form the release main body of lightning current of lightning arrester.
2. overhead transmission line as claimed in claim 1 is characterized in that: described low voltage varistor sheet (3), its pressure sensitive voltage≤2000V, nominal discharge current 〉=20kA with strong thunder and lightning load lightning arrester.
3. overhead transmission line as claimed in claim 1 is characterized in that: described equal piezoelectricity anti-(4) employing resistor or high-voltage capacitor with strong thunder and lightning load lightning arrester.
4. overhead transmission line as claimed in claim 1 is with strong thunder and lightning load lightning arrester, and it is characterized in that: clearance electrode (7) is made by graphite or copper-tungsten material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200855911U CN201417654Y (en) | 2009-05-08 | 2009-05-08 | Strong thunder load arrester for overhead transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200855911U CN201417654Y (en) | 2009-05-08 | 2009-05-08 | Strong thunder load arrester for overhead transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201417654Y true CN201417654Y (en) | 2010-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200855911U Expired - Lifetime CN201417654Y (en) | 2009-05-08 | 2009-05-08 | Strong thunder load arrester for overhead transmission line |
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| CN (1) | CN201417654Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200099A (en) * | 2010-03-26 | 2011-09-28 | 西门子公司 | Arrangement for directing a lightning current within a wind turbine |
| CN103078309A (en) * | 2013-01-06 | 2013-05-01 | 山西省电力公司大同供电分公司 | Device and method for buffering momentary wave overvoltage of power transmission line |
| CN103730216A (en) * | 2014-01-16 | 2014-04-16 | 国家电网公司 | 10KV wiring circuit lightning protection device |
| CN104051096A (en) * | 2013-05-03 | 2014-09-17 | 湖北文理学院 | Piezoresistor combination block |
| CN110189878A (en) * | 2018-04-11 | 2019-08-30 | 谭乔文 | A kind of surge protector MOV chip and preparation method thereof |
| CN111292907A (en) * | 2020-02-19 | 2020-06-16 | 湖南特诚成套电器有限公司 | Porcelain shell type zinc oxide lightning arrester and using method thereof |
-
2009
- 2009-05-08 CN CN2009200855911U patent/CN201417654Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200099A (en) * | 2010-03-26 | 2011-09-28 | 西门子公司 | Arrangement for directing a lightning current within a wind turbine |
| CN103078309A (en) * | 2013-01-06 | 2013-05-01 | 山西省电力公司大同供电分公司 | Device and method for buffering momentary wave overvoltage of power transmission line |
| CN103078309B (en) * | 2013-01-06 | 2015-11-04 | 山西省电力公司大同供电分公司 | Transmission line moment ripple overvoltage buffer unit and way to play for time |
| CN104051096A (en) * | 2013-05-03 | 2014-09-17 | 湖北文理学院 | Piezoresistor combination block |
| CN103730216A (en) * | 2014-01-16 | 2014-04-16 | 国家电网公司 | 10KV wiring circuit lightning protection device |
| CN110189878A (en) * | 2018-04-11 | 2019-08-30 | 谭乔文 | A kind of surge protector MOV chip and preparation method thereof |
| CN111292907A (en) * | 2020-02-19 | 2020-06-16 | 湖南特诚成套电器有限公司 | Porcelain shell type zinc oxide lightning arrester and using method thereof |
| CN111292907B (en) * | 2020-02-19 | 2022-02-11 | 湖南特诚成套电器有限公司 | Porcelain shell type zinc oxide lightning arrester and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Ailao Hi Tech Co. Ltd. Assignor: Wuhan Arrow Advanced Technology Co.,Ltd. Contract record no.: 2011990000629 Denomination of utility model: Strong thunder load arrester for overhead transmission line Granted publication date: 20100303 License type: Exclusive License Record date: 20110714 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100303 |
|
| CX01 | Expiry of patent term |