CN202093119U - Built-in partial discharge monitoring sensor for transformer - Google Patents
Built-in partial discharge monitoring sensor for transformer Download PDFInfo
- Publication number
- CN202093119U CN202093119U CN2011201573661U CN201120157366U CN202093119U CN 202093119 U CN202093119 U CN 202093119U CN 2011201573661 U CN2011201573661 U CN 2011201573661U CN 201120157366 U CN201120157366 U CN 201120157366U CN 202093119 U CN202093119 U CN 202093119U
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- flange
- cup
- transformer
- oil tank
- fuel tank
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Abstract
A built-in partial discharge monitoring sensor for a transformer belongs to the technical field of detection. The technical scheme is that the built-in partial discharge sensor comprises an oil tank flange, an annular outer flange, a cup-shaped window and an ultrahigh frequency sensor, wherein the oil tank flange is fixed on the outer wall of a transformer oil tank, the central hole of the oil tank flange is opposite to a detection hole in the wall of the transformer oil tank, the outer diameter of the cup-shaped window is matched with the diameter of the central hole of the oil tank flange, a cup opening is provided with an outward flanging, the bottom of the cup-shaped window is extended into the transformer oil tank through the central hole of the oil tank flange, the outer flange is coaxially connected with the oil tank flange by a bolt, a groove matched with the flanging of the cup opening of the cup-shaped window is arranged on the opposite surface of the outer flange and the oil tank flange, and the ultrahigh frequency sensor is arranged in the cup-shaped window and is fixedly connected with the outer flange by a connecting plate. The ultrahigh frequency sensor receives ultrahigh frequency electromagnetic wave generated due to partial discharge inside the transformer oil tank, is not influenced by outside interference and the shading of oil tank walls, thus having high detection sensitivity.
Description
Technical field
The utility model relates to a kind of built-in ultra-high frequency signal sensor that the partial discharges fault of transformer inside is monitored of being used for, and belongs to the detection technique field.
Background technology
Power transformer adopts the oil immersed type composite insulation structure usually, and along with power system development, electric pressure improves constantly, and shelf depreciation has become the main cause of electric power transformer insulated deterioration.Therefore, it is significant to the safe and stable operation of guaranteeing power equipment effectively to detect partial discharges fault.
At present, the detection method of shelf depreciation mainly contains pulse current method, supercritical ultrasonics technology, vapor-phase chromatography and ultrahigh frequency method.Pulse current method and supercritical ultrasonics technology are subjected to external interference easily and sensitivity is lower; There is very big time delay in vapor-phase chromatography, can not reflect catastrophic discontinuityfailure; The uhf electromagnetic wave that the ultrahigh frequency method produces by the inner shelf depreciation of receiving transformer is realized the detection of shelf depreciation.Ultrahigh frequency detection method detection frequency band commonly used is 500-1500MHz, and on-site noise is usually less than 400MHz, thereby can avoid well disturbing, and owing to detect bandwidth, sensitivity is also than other method height.In addition, different with other method, the discharge pulse waveform of the more approaching reality of waveform that the ultrahigh frequency method records can be studied the essential characteristic of the inner shelf depreciation of transformer more all sidedly.But existing uhf sensor can only be put the uhf electromagnetic wave of generation in transformer tank external body office of acceptance, and owing to the shielding action of transformer-cabinet to uhf electromagnetic wave, the ultrahigh frequency method can't obtain desirable detection sensitivity at present.Therefore, how to overcome the shielding of transformer-cabinet, the detection sensitivity that the uhf electromagnetic wave of generation is put in raising office becomes the relevant technologies personnel emphasis of research at present.
The utility model content
The purpose of this utility model is to provide a kind of can effectively overcome the shielding of transformer-cabinet to uhf electromagnetic wave, and monitoring sensor is put in the built-in transformer office that the detection sensitivity of uhf electromagnetic wave is significantly improved.
Problem described in the utility model realizes with following technical proposals:
Monitoring sensor is put in a kind of built-in transformer office, comprise the fuel tank flange in the formation, the ring-type outside flange, cup-shaped forms and uhf sensor, described fuel tank flange is fixed on the outer wall of oil tank of transformer, and its center pit is relative with exploration hole on the transformer oil tank wall, the center bore of the external diameter of described cup-shaped forms and fuel tank flange is complementary and rim of a cup is provided with outside flange, its bottom is stretched in the oil tank of transformer through the center pit of fuel tank flange, described outside flange is connected with the fuel tank flange is coaxial by bolt, the opposite face of itself and fuel tank flange is provided with the groove that the rim of a cup flange with the cup-shaped forms is complementary, and described uhf sensor is installed in the cup-shaped forms and is affixed by web joint and outside flange.
Monitoring sensor is put in above-mentioned built-in transformer office, comprise pick-up dipole, electrode conductor and IO interface in the formation of described uhf sensor, the front end of described pick-up dipole is positioned at cup-shaped forms inner bottom part, its rear end is connected with IO interface through electrode conductor, the outside of described electrode conductor is disposed with ceramic insulating layer and metal shell, and described metal shell is connected with web joint with locknut by its outside ring gasket.
Monitoring sensor is put in above-mentioned built-in transformer office, and the center pit of outside flange is provided with protecting cover, and described protecting cover is connected with outside flange by bolt.
Monitoring sensor is put in above-mentioned built-in transformer office, is provided with the sealing plain cushion between the rim of a cup flange of fuel tank flange and cup-shaped forms.
The utility model is inserted cup-shaped forms inside with uhf sensor, and the cup-shaped forms are extend into oil tank of transformer inside, make uhf sensor in oil tank of transformer, receive the uhf electromagnetic wave of local discharge generation, so just can not be subjected to the extraneous interference and the shielding of oil tank wall, thereby have very high detection sensitivity.Protecting cover on the outside flange is used to shield the interference of external signal, also has dustproof, waterproof and protective effect simultaneously.The seepage that the sealing plain cushion can prevent transformer oil is set between cup-shaped forms and fuel tank flange, guarantees the sealing of detection window.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of uhf sensor.
Each label is among the figure: 1, fuel tank flange; 2, outside flange; 3, cup-shaped forms; 4, protecting cover; 5, uhf sensor; 6, web joint; 7, sealing plain cushion; 8, transformer oil tank wall; 9, transformer oil; 10, pick-up dipole; 11, electrode conductor; 12, ceramic insulating layer; 13, metal shell; 14, ring gasket; 15, locknut; 16, IO interface.
Embodiment
Referring to Fig. 1, Fig. 2, the utility model is made up of fuel tank flange 1, ring-type outside flange 2, sealing plain cushion 7, cup-shaped forms 3, protecting cover 4 and uhf sensor 5.Be provided with ceramic insulating layer 12 in the metal shell 13 of uhf sensor 5, ceramic insulating layer 12 the insides are connecting an electrode conductor 11, and electrode conductor 11 upper ends are threaded.After putting ring gasket 14 on the threaded metal shell 13, be assembled on the web joint 6, utilize locknut 15 with its locking, constitute the sealed insulation device that a cover has high sealing, high insulation.Install IO interface 16 again, and pick-up dipole 10 is fixed to electrode conductor 11 front ends has just constituted receiving trap.During assembling cup-shaped forms 3 are embedded in the groove of ring-type outside flange 2, utilize fastening bolt that outside flange 2 and fuel tank flange 1 are linked together, sealing plain cushion 7 is installed between the rim of a cup flange of fuel tank flange 1 and ring-type outside flange 2 and cup-shaped forms 3, is prevented leakage of oil between ring-type outside flange 2 and the fuel tank flange 1, oil impregnate; Simultaneously also prevent oil seepage in cup-shaped forms 3, guarantee positive confinement.Web joint 6 with uhf sensor 5 is fixed on the outside flange 2 then, and makes the signal receiving end of uhf sensor 5 stretch into cup-shaped forms 3 bottoms.Utilize fastening bolt that protecting cover 4 is fixed on the ring-type outside flange 2 at last, play shielding and protective action.
The material of cup-shaped forms 3 can adopt teflon, also can be that other is heat-resisting, corrosion-resistant, physical strength is high, the material of good insulation preformance.
Cup-shaped forms 3 of the present utility model are insinuated in the oil tank of transformer, have solved the shielding problem of transformer-cabinet, have also got rid of external interference simultaneously, and detection sensitivity is improved greatly.This device and same life-span of transformer consubstantiality can be changed when overhaul.Be installed in charged for replacement, maintenances at any time such as its inner transformer partial discharge monitoring sensor, monitoring arrangement.
Claims (4)
1. monitoring sensor is put in a built-in transformer office, it is characterized in that, it comprises fuel tank flange (1), ring-type outside flange (2) and cup-shaped forms (3) and uhf sensor (5); Described fuel tank flange (1) is fixed on the outer wall of oil tank of transformer, and its center pit is relative with exploration hole on the transformer oil tank wall (8), the center bore of the external diameter of described cup-shaped forms (3) and fuel tank flange (1) is complementary and rim of a cup is provided with outside flange, its bottom is stretched in the oil tank of transformer through the center pit of fuel tank flange (1), described outside flange (2) is by bolt and coaxial connection of fuel tank flange (1), and the opposite face of itself and fuel tank flange (1) is provided with the corresponding groove of rim of a cup flange with cup-shaped forms (3); Described uhf sensor (5) is installed in the cup-shaped forms (3) also affixed by web joint (6) and outside flange (2).
2. put monitoring sensor according to the described built-in transformer of claim 1 office, it is characterized in that, comprise pick-up dipole (10) in the formation of described uhf sensor (5), electrode conductor (11) and IO interface (16), the front end of described pick-up dipole (10) is positioned at cup-shaped forms (3) inner bottom part, its rear end is connected with IO interface (16) through electrode conductor (11), the outside of described electrode conductor (11) is disposed with ceramic insulating layer (12) and metal shell (13), and described metal shell (13) is connected with web joint (6) with locknut (15) by its outside ring gasket (14).
3. put monitoring sensor according to claim 1 or 2 described built-in transformer offices, it is characterized in that the center pit of outside flange (2) is provided with protecting cover (4), described protecting cover (4) is connected with outside flange (2) by bolt.
4. put monitoring sensor according to the described built-in transformer of claim 3 office, it is characterized in that, between the rim of a cup flange of fuel tank flange (1) and cup-shaped forms (3), be provided with sealing plain cushion (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201573661U CN202093119U (en) | 2010-12-31 | 2011-05-17 | Built-in partial discharge monitoring sensor for transformer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020694532 | 2010-12-31 | ||
| CN201020694532.7 | 2010-12-31 | ||
| CN2011201573661U CN202093119U (en) | 2010-12-31 | 2011-05-17 | Built-in partial discharge monitoring sensor for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202093119U true CN202093119U (en) | 2011-12-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201573661U Expired - Fee Related CN202093119U (en) | 2010-12-31 | 2011-05-17 | Built-in partial discharge monitoring sensor for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202093119U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709037A (en) * | 2012-06-20 | 2012-10-03 | 湖北省电力公司电力试验研究院 | Transformer with built-in transducer |
| CN104267323A (en) * | 2014-10-14 | 2015-01-07 | 国家电网公司 | Main partial discharge detection device based on built-in UHF sensor |
| CN105510775A (en) * | 2015-11-27 | 2016-04-20 | 广东电网有限责任公司电力科学研究院 | Installation method of ultrahigh-frequency sensor |
| CN106405340A (en) * | 2015-07-30 | 2017-02-15 | 上海欧秒电力监测设备有限公司 | GIS fault indication system based on partial discharge sensor |
| CN107064766A (en) * | 2017-02-27 | 2017-08-18 | 厦门理工学院 | A kind of partial discharge monitoring Cap for tin body |
| CN108051710A (en) * | 2017-12-04 | 2018-05-18 | 重庆臻远电气有限公司 | In gas-insulating and fully-enclosed combined electrical apparatus can charged for replacement monitoring device |
| CN108318790A (en) * | 2018-03-16 | 2018-07-24 | 深圳供电局有限公司 | Built-in SF6 gas-insulated transformer partial discharge monitoring system |
| CN108878123A (en) * | 2018-06-01 | 2018-11-23 | 中国电力科学研究院有限公司 | The distribution transformer of built-in arrester |
| CN111175315A (en) * | 2019-12-25 | 2020-05-19 | 深圳供电局有限公司 | Camera device for observing inside of oil-immersed transformer |
-
2011
- 2011-05-17 CN CN2011201573661U patent/CN202093119U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709037A (en) * | 2012-06-20 | 2012-10-03 | 湖北省电力公司电力试验研究院 | Transformer with built-in transducer |
| CN102709037B (en) * | 2012-06-20 | 2016-08-17 | 国家电网公司 | A kind of transformator possessing built-in sensors |
| CN104267323A (en) * | 2014-10-14 | 2015-01-07 | 国家电网公司 | Main partial discharge detection device based on built-in UHF sensor |
| CN104267323B (en) * | 2014-10-14 | 2017-02-22 | 国家电网公司 | Main partial discharge detection device based on built-in UHF sensor |
| CN106405340A (en) * | 2015-07-30 | 2017-02-15 | 上海欧秒电力监测设备有限公司 | GIS fault indication system based on partial discharge sensor |
| CN105510775A (en) * | 2015-11-27 | 2016-04-20 | 广东电网有限责任公司电力科学研究院 | Installation method of ultrahigh-frequency sensor |
| CN107064766A (en) * | 2017-02-27 | 2017-08-18 | 厦门理工学院 | A kind of partial discharge monitoring Cap for tin body |
| CN108051710A (en) * | 2017-12-04 | 2018-05-18 | 重庆臻远电气有限公司 | In gas-insulating and fully-enclosed combined electrical apparatus can charged for replacement monitoring device |
| CN108318790A (en) * | 2018-03-16 | 2018-07-24 | 深圳供电局有限公司 | Built-in SF6 gas-insulated transformer partial discharge monitoring system |
| CN108878123A (en) * | 2018-06-01 | 2018-11-23 | 中国电力科学研究院有限公司 | The distribution transformer of built-in arrester |
| CN108878123B (en) * | 2018-06-01 | 2021-07-06 | 中国电力科学研究院有限公司 | Distribution transformer with built-in lightning arrester |
| CN111175315A (en) * | 2019-12-25 | 2020-05-19 | 深圳供电局有限公司 | Camera device for observing inside of oil-immersed transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20160517 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |