CN201307768Y - Special lightning protection wave trapper for a power distribution transformer - Google Patents
Special lightning protection wave trapper for a power distribution transformer Download PDFInfo
- Publication number
- CN201307768Y CN201307768Y CNU2008200293676U CN200820029367U CN201307768Y CN 201307768 Y CN201307768 Y CN 201307768Y CN U2008200293676 U CNU2008200293676 U CN U2008200293676U CN 200820029367 U CN200820029367 U CN 200820029367U CN 201307768 Y CN201307768 Y CN 201307768Y
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Abstract
The utility model relates to a special lightning protection wave trapper for a power distribution transformer, which is mainly used for the lightning protection protection of the small-capacity outdoor power distribution transformers, and not only can effectively reduce the gradient of steep wave over voltage, but also can remarkably reduce the amplitude of the lightning wave which invades the transformer. The special lightning protection wave trapper for a power distribution transformer mainly comprises an inductance L, a discharging gap J, a current-limit resistor R and an insulation shell K. The special lightning protection wave trapper has the advantages: 1. through the reasonable parameters design, the amplitude and the gradient of the invaded lightning wave can be effectively reduced; being cooperated with the traditional lightning protection device, the transformer can be prevented from being damaged by the lightning, thereby remarkably improving the running reliability of the electric power device.
Description
Technical field
The utility model relates to the special-purpose lightning protection trap of a kind of distribution transformer, is mainly used in the lightning protection of outdoor terminal distribution transformer, belongs to power supply, distribution field.
Background technology
In the terminal distribution system, 10kV and 35kV electrical network and distribution transformer (distribution transforming) in occupation of and consequence, the distribution of distribution line ground is wide greatly, the insulation level of circuit and equipment is far below ultra-high-tension power transmission line.At thunderstorm season, not only thunder and lightning is attacked the accident that distribution line (direct lightning strike) can cause circuit and equipment directly, and near the thunderbolt circuit during other object, the frequent on the line induction thunder that produces also can cause the accident of circuit and equipment.Therefore, the damage to crops caused by thunder accident of minimizing distribution transformer is important measures that improve the power system power supply reliability.
The lightning protection of distribution transformer should comprise two aspect contents: the overvoltage protection of (1) main insulation, main purpose are the amplitudes of the lightning voltage of restriction invasion distribution transforming, and major measure is lightning arrester to be installed, to be reduced earth resistance to distribution transforming.Generally adopt at present.(2) overvoltage protection of Transformer Winding vertical (circle/interlayer) insulation; main purpose is to reduce the steepness of the lightning voltage of invasion distribution transforming; prevent that big steep wave overvoltage of wave head time very short (being about 0.1～1.0 μ s), steepness from damaging the circle/layer insulation of transformer; but still do not have effective privacy protection equipment so far, this is the problem that mainly solves of the utility model just.
The content of utility model
The purpose of this utility model is to overcome the shortcoming described in the background technology, provide a kind of simple in structure, can effectively reduce the amplitude of invading ripple and the special-purpose lightning protection trap of distribution transformer of steepness, reduce the damage to crops caused by thunder accident of distribution transformer.
The purpose of this utility model realizes by following approach: inductance, insulated support, iron core, current-limiting resistance sheet and sparking electrode are sealed in the special-purpose lightning protection trap of a kind of distribution transformer of formation in the insulation crust by reasonable structural design, and the space between its inside is filled fixing by insulating packing; Inductance is fixed on outside the insulated support; Iron core, current-limiting resistance sheet, sparking electrode are fixed within the insulated support.The high-pressure side sleeve pipe that the special-purpose lightning protection trap of distribution transformer is serially connected in distribution transformer exports, and makes it between zinc oxide arrester and distribution transformer inlet.When thunder and lightning is invaded the ripple arrival, the open circuit reflection takes place before the special-purpose lightning protection trap of distribution transformer, incident wave and reflected wave just can move zinc oxide arrester after superposeing under lower incident voltage, thereby have limited the amplitude of invading ripple; In addition, the steep wave of refraction is by after the inductance, and its steepness of wave edge reduces greatly, makes be evenly distributed of overvoltage in winding inside, thereby has reduced the circle/interlayer overvoltage of winding effectively, has avoided the insulation breakdown and the short circuit of winding turns/interlayer; Because winding and the lead-in wire gap flash-over characteristic under sloping wave head overvoltage is better than steep wave head flash-over characteristic, thereby effectively prevents the discharge accident of internal clearance and lead-in wire.
When the lightning overvoltage amplitude of invading was high especially, the special-purpose lightning protection trap of distribution transformer internal clearance J action inserted current-limiting resistance R, further limits the overvoltage that is distributed on the Transformer Winding.Yet under normal conditions, the lightning overvoltage amplitude can be not high especially, so sparking electrode, current-limiting resistance sheet can be omitted in some concrete enforcement.
Description of drawings
Fig. 1 is an electrical schematic diagram of the present utility model.
Fig. 2 is the utility model overall structure schematic diagram.
Fig. 3 is the utility model typical case's using method and protection philosophy figure.
In the accompanying drawing, 1. insulation crust, 2. inductance, 3. insulated support, 4. sparking electrode, 5. iron core, 6. current-limiting resistance sheet, 7. insulating packing, 8. inductance coil lead-in wire, 9. external connection terminal, 10. reflected wave, 11. incident waves, 12. refracted wave, the special-purpose lightning protection trap of 13. distribution transformers, 14. zinc oxide arrester MOA1,15. zinc oxide arrester MOA2,16. distribution transformers, 17. conductor resistances and earth resistance sum R=4～10 Ω.
Embodiment
1. Fig. 1 represents electrical schematic diagram of the present utility model, and generally speaking, thunder and lightning invasion ripple is by the reflection and the refraction of inductance L, and its amplitude and steepness all obtain restriction; Served as voltage magnitude when high especially, the special-purpose lightning protection trap of distribution transformer internal clearance J action inserts current-limiting resistance R, and restriction is distributed in the overvoltage on the Transformer Winding.
2. Fig. 2 represents overall structure schematic diagram of the present utility model, and insulating packing (7) internal fixation has inductance (2), insulated support (3), iron core (5), current-limiting resistance sheet (6); Inductance is connected on the sparking electrode (4) by inductance coil lead-in wire (8); All be closed in the insulation crust (1); Be connected by between external connection terminal (9) and zinc oxide arrester and the distribution transformer.
3. Fig. 3 represents using method of the present utility model and protection philosophy; the action routine and the principle of this device are as follows: the high-pressure side sleeve pipe that the special-purpose lightning protection trap of distribution transformer (13) is serially connected in distribution transformer (16) exports, and makes it between zinc oxide arrester MOA1 (14) and distribution transformer (16) inlet.When thunder and lightning is invaded the ripple arrival, in the reflection of the preceding generation open circuit of the special-purpose lightning protection trap of distribution transformer (13), after incident wave (11) and reflected wave (10) stack, zinc oxide arrester MOA1 (14) just can be moved under lower incident voltage, thereby limited the amplitude of invading ripple; In addition, the steep wave of refraction is by after the inductance, and its steepness of wave edge reduces greatly, makes be evenly distributed of overvoltage in winding inside, thereby has reduced the circle/interlayer overvoltage of winding effectively, has avoided the insulation breakdown and the short circuit of winding turns/interlayer.
Claims (2)
1. the special-purpose lightning protection trap of a distribution transformer, it is characterized in that being provided with in insulation crust (1) inductance (2), insulated support (3), sparking electrode (4), iron core (5) and current-limiting resistance sheet (6), the space between them is filled fixing by insulating packing (7).
2. the special-purpose lightning protection trap of distribution transformer according to claim 1 is characterized in that described sparking electrode (4), iron core (5), current-limiting resistance sheet (6) are fixed in the insulated support (3), and inductance (2) is fixed on outside the insulated support (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200293676U CN201307768Y (en) | 2008-06-16 | 2008-06-16 | Special lightning protection wave trapper for a power distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200293676U CN201307768Y (en) | 2008-06-16 | 2008-06-16 | Special lightning protection wave trapper for a power distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201307768Y true CN201307768Y (en) | 2009-09-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200293676U Expired - Fee Related CN201307768Y (en) | 2008-06-16 | 2008-06-16 | Special lightning protection wave trapper for a power distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201307768Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904213A (en) * | 2012-10-24 | 2013-01-30 | 深圳市雷博斯科技有限公司 | Lightning protection structure for counterattack shunting of transformer |
| CN103151126A (en) * | 2013-03-12 | 2013-06-12 | 郑越 | Over-voltage protector used for 220V or 380V alternating-current power system |
| CN103474940A (en) * | 2013-09-28 | 2013-12-25 | 成都星河科技产业有限公司 | Comprehensive lightning protection system of electric transmission lines of high tower of power grid |
| CN104659776A (en) * | 2014-12-04 | 2015-05-27 | 国家电网公司 | Lightning counterattack protection device |
| CN105119259A (en) * | 2015-07-24 | 2015-12-02 | 中国石油化工股份有限公司 | Direct lightning protection system |
| CN106786448A (en) * | 2016-09-29 | 2017-05-31 | 国家电网公司 | A kind of overvoltage protection for variable impedance transformer |
| CN109524187A (en) * | 2019-01-25 | 2019-03-26 | 陈达 | A kind of arrester and integrated circuit with front-end protection circuit |
| CN110137907A (en) * | 2019-05-29 | 2019-08-16 | 广西电网有限责任公司电力科学研究院 | A kind of inhibition over-voltage protector suitable for 10kV distribution transformer |
| WO2020011040A1 (en) * | 2018-07-09 | 2020-01-16 | 王雪燕 | Self-energy-consuming type circuit integrated lightning protection apparatus |
| CN113782321A (en) * | 2021-09-26 | 2021-12-10 | 云南电网有限责任公司红河供电局 | Method and device for restraining forward and reverse transformation overvoltage of distribution transformer |
-
2008
- 2008-06-16 CN CNU2008200293676U patent/CN201307768Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904213A (en) * | 2012-10-24 | 2013-01-30 | 深圳市雷博斯科技有限公司 | Lightning protection structure for counterattack shunting of transformer |
| CN102904213B (en) * | 2012-10-24 | 2016-06-29 | 深圳市雷博斯科技有限公司 | A kind of lightning protection structure of transformator counterattack shunting |
| CN103151126A (en) * | 2013-03-12 | 2013-06-12 | 郑越 | Over-voltage protector used for 220V or 380V alternating-current power system |
| CN103151126B (en) * | 2013-03-12 | 2015-09-30 | 郑越 | For the overvoltage protector of 220V or 380V AC electric power systems |
| CN103474940B (en) * | 2013-09-28 | 2016-01-13 | 成都星河科技产业有限公司 | A kind of electrical network high tower power transmission line comprehensive lightning-protection system |
| CN103474940A (en) * | 2013-09-28 | 2013-12-25 | 成都星河科技产业有限公司 | Comprehensive lightning protection system of electric transmission lines of high tower of power grid |
| CN104659776A (en) * | 2014-12-04 | 2015-05-27 | 国家电网公司 | Lightning counterattack protection device |
| CN105119259A (en) * | 2015-07-24 | 2015-12-02 | 中国石油化工股份有限公司 | Direct lightning protection system |
| CN106786448A (en) * | 2016-09-29 | 2017-05-31 | 国家电网公司 | A kind of overvoltage protection for variable impedance transformer |
| WO2020011040A1 (en) * | 2018-07-09 | 2020-01-16 | 王雪燕 | Self-energy-consuming type circuit integrated lightning protection apparatus |
| CN109524187A (en) * | 2019-01-25 | 2019-03-26 | 陈达 | A kind of arrester and integrated circuit with front-end protection circuit |
| CN110137907A (en) * | 2019-05-29 | 2019-08-16 | 广西电网有限责任公司电力科学研究院 | A kind of inhibition over-voltage protector suitable for 10kV distribution transformer |
| CN113782321A (en) * | 2021-09-26 | 2021-12-10 | 云南电网有限责任公司红河供电局 | Method and device for restraining forward and reverse transformation overvoltage of distribution transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI SUXIAN SWITCH CO., LTD. Free format text: FORMER OWNER: LANHE ELECTRIC ENGINEERING CO., LTD., SHAANXI Effective date: 20120503 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 710075 XI AN, SHAANXI PROVINCE TO: 200240 MINHANG, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120503 Address after: 200240 Shanghai city Minhang District Jianchuan Road No. 951 Building 5 floor 2 room 2002 Patentee after: Sahnghai Speed Limit Switch Co.,Ltd. Address before: Mi Jia Qiao old village labor Road 710075 Shaanxi city of Xi'an Province, No. 123 Patentee before: Lanhe Electric Engineering Co., Ltd., Shaanxi |
|
| DD01 | Delivery of document by public notice |
Addressee: Wang Sumei Document name: Notification of Passing Examination on Formalities |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20140616 |
|
| EXPY | Termination of patent right or utility model |