CN2400881Y - Dry voltage transformer - Google Patents
Dry voltage transformer Download PDFInfo
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- CN2400881Y CN2400881Y CN 99255044 CN99255044U CN2400881Y CN 2400881 Y CN2400881 Y CN 2400881Y CN 99255044 CN99255044 CN 99255044 CN 99255044 U CN99255044 U CN 99255044U CN 2400881 Y CN2400881 Y CN 2400881Y
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Abstract
The utility model relates to a dry voltage transformer, which is composed of a capacitor voltage divider and an electronic power amplifier. The utility model is characterized in that either of the high-voltage capacitor and the low voltage capacitor of the voltage divider is a set of concentric circle capacitor screen which is orderly wrapped with an insulating tape and is fixed on the same rigid tubular electrode, and the outermost layer is an organic insulating outer sheath and a shed; the leading wires of both ends of the low-voltage capacitor are coupled in the power amplifier, driving a voltage meter and a relaying protection device. The utility model has the advantages of no oil, no porcelain, no SF6, small size, light weight, high pollution flashover voltage, convenient maintenance, safe operation, etc. The utility model can be used for the voltage measurement and the relay protection of electric network, so the reliability of the electric network can be enhanced, and the utility model is favorable for environmental protection.
Description
The utility model relates to a kind of novel dry-type voltage inductor, belongs to the High-Voltage Electrical Appliances field.
At present, the voltage transformer that is used for high voltage measuring and relay protection of power system on the market, home and abroad has two types, and a kind of is electromagnetic potential transformer, and another kind is a capacitance type potential transformer.
The electromagnetic potential transformer of 35kV and above electric pressure, the overwhelming majority are oil-filled insulator tubular type voltage transformer, and it is to pack into and constitute in the oil-overflow porcelain bushing being entangled in high-tension coil on the iron core and low-voltage coil.There is following several shortcoming in this voltage transformer: the 1. easy leakage of oil of oil-filled equipment, and contaminated environment is also caught fire easily, is exploded, and causes casualties and device damage; 2. for preventing that equipment from making moist, need to insulate every year preventive trial and oiling are tested, and maintenance workload is big; 3. China's environmental pollution is serious at present, though the leakage of porcelain bushing can't be avoided the pollution flashover generation than apart from bigger, further increases and leaks than the real difficulty that belongs to of distance.4. China 66kV electrical network mostly is small current neutral grounding system, and electromagnetic potential transformer excites ferro resonance probably, causes interior many voltage transformers to damage or blast on a large scale.Also has a kind of electromagnetic potential transformer, be to be entangled in high-tension coil on the iron core and low-voltage coil to pack into and constitute in the porcelain bushing that is full of SF6 gas, gas permeation may take place in it, the personnel that cause poison, contaminated environment, also needing every year to detect and leakage detection work, and cost an arm and a leg, is 3 times of filling type voltage transformer price.
Another kind of capacitance type potential transformer is used in 110kV and the above electrical network more, it is actually a voltage divider, its high-voltage arm is a high-voltage capacitor, be to constitute in packing capacitor body into the high voltage porcelain bushing pipe oil-filled, its low-voltage arm is the resonant tank that is formed in parallel by an intermediate voltage capacitor and reactor.This capacitance type potential transformer exists some major defects of the electromagnetic potential transformer of oil-filled porcelain bushing equally.
In recent years, domestic invention has also been promoted a kind of novel high-pressure wall bushing (patent No. is 93240259.3), it is the condenser bushing that does not have oil, no porcelain, all makes with organic insulating material, with organic insulation film band successively with several from inside to outside gradually the concentric circles tubular capacitance plate of shortening closely be fixed on the rigid tubular electrode.This year the domestic a kind of novel dry-type current transformer (number of patent application is 99201400.X) of also having invented, be that above-mentioned high-voltage wall bushing is curved " U " type, as a winding of current transformer, and at a plurality of secondary winding formation of the ground connection position suit of " U " type bottom dry-type current transformer.Utilize the capacitor core of novel high-pressure wall bushing or the capacitor core of a winding of dry-type current transformer to make high-voltage capacitance, continue to hold the several layers capacitance plate again and make low-voltage capacitance, can constitute the novel dry-type voltage inductor of capacitance-voltage-distributing type.
The purpose of this utility model provides a kind of novel dry-type voltage inductor; it can carry out voltage measurement and provide voltage signal for protective relaying device; the function that also has wall bushing or current transformer simultaneously is no porcelain, do not have oil, fire prevention, explosion-proof, anti-pollution flashover, volume are little, the novel dry-type voltage inductor of light weight, moderate cost.
This dry-type voltage inductor, comprise high-voltage capacitance 1, low-voltage capacitance 2, electronic type power amplifier 3, it is characterized in that high-voltage capacitance 1 is several concentric circles tubular capacitance plates that shorten gradually from inside to outside, and closely be fixed on the tubulose rigid electrode 4 successively by organic insulation film band, low-voltage capacitance 2 also is made up of one group of cylindric capacitance plate that organic insulation film band closely is fixed on high-voltage capacitance 1 outside successively, organic insulation oversheath 5 closely is fixed on the outside of whole high-voltage capacitance 1 and low-voltage capacitance 2, organic insulation full skirt 6 is fixed on outside the oversheath 5, and draw measurement terminal 7 from high-voltage capacitance 1 and low-voltage capacitance 2 connection places, draw earth terminal 8 from the other end of low-voltage capacitance 2.
The low-voltage capacitance 2 of dry-type voltage inductor, be to be formed in parallel with a plurality of cylindric electric capacity that organic insulation film band is done insulation and closely is fixed on high-voltage capacitance 1 outside, its capacitance can directly be imported electronic type power amplifier 3 much larger than the capacitance of high-voltage capacitance 1 from the voltage signal that takes out between measurement terminal 7 and the earth terminal 8.
The tubulose rigid electrode of dry-type voltage inductor can be " one " font or " U " shape.
The utlity model has following advantage:
1. there are not oil, no porcelain, no SF6 gas owing to this voltage transformer, therefore, ne-leakage, free from environmental pollution, help fire prevention, explosion-proof, anti-pollution flashover.
2. this voltage transformer does not have oil, no SF6 gas, has reduced maintenance workloads such as test, maintenance, has alleviated working strength of workers.
3. this voltage transformer does not have iron core, can not cause the ferro resonance of system, can prevent because ferro resonance causes the large tracts of land accident of electrical network.
4. because this voltage transformer surface voltage is evenly distributed and organic insulation oversheath and full skirt hydrophobicity are strong, pollution flashover voltage helps preventing that far above the voltage transformer of prior art electrical network generation pollution flashover from causing large-area power-cuts.
5. the voltage ratio of dry-type voltage inductor is not influenced by temperature and changes in atmospheric, and is very stable.
6. after penetrating carrying object in the rigid electrode of the voltage divider of forming by high-voltage capacitance and low-voltage capacitance, when if rigid electrode is shaped as " one " word, this dry-type voltage inductor can be used as high-voltage wall bushing simultaneously, forms the combined electrical apparatus of voltage transformer and high-voltage wall bushing; When rigid electrode was shaped as " U " font, dry-type voltage inductor can be formed the combined electrical apparatus of dry-type voltage inductor and high voltage dry-type current transformer as a winding of high voltage dry-type current transformer.All there is current transformer in each transformer station, and all there is wall bushing in each indoor transformer station, has used this utility model can save High-Voltage Electrical Appliances, has not only reduced the floor space of transformer station but also reduced cost.
Embodiment of the present utility model is referring to following each figure.
Fig. 1 is a principle schematic.
Fig. 2 is the structural representation of being made up of high-voltage capacitance and low-voltage capacitance.Among the figure: 1-high-voltage capacitance 2-low-voltage capacitance 3-electronic type power amplifier 4-rigid electrode 5-oversheath 6-full skirt 7-measurement terminal 8-earth electrode
For example, desire is made the dry-type voltage inductor of a 110kV, can follow these steps to carry out:
1. choose a diameter of phi 50 earlier, the stainless steel tube of length 3500 is made rigid electrode 4, with surface grinding.
2. make high-voltage capacitance 1: on rigid electrode 4, hold earlier the about 1mm of insulation belt, lay the aluminium foil capacitance plate then, hold the about 1mm of insulating tape again, re-lay aluminum foil screen.Every screen length shortens 40mm gradually, until the 25th screen.
3. on the 25th screen, twine lead and this connecting wire is connected to measurement terminal 7 by insulated tube.
4. make low-voltage capacitance 2: hold 6 again at high-voltage capacitance 1 outermost layer and shield the capacitance plate of same length, it is together in parallel, an end and the 25th screen connect, and the other end connects with earth electrode 8.
5. make oversheath 5 and full skirt 6: with heat-shrink tube with integral body parcel and fixing, sticking then full skirt several, make and leak than apart from reaching customer requirements.
6. measurement terminal 7 and earth terminal 8 are inserted electronic type power amplifier 3 through shielding conductor.
Claims (3)
1. novel dry-type voltage inductor, comprise high-voltage capacitance (1), low-voltage capacitance (2), electronic type power amplifier (3), it is characterized in that high-voltage capacitance (1) is several concentric circles tubular capacitance plates that shorten gradually from inside to outside, and closely be fixed on successively on the tubulose rigid electrode (4) by organic insulation film band, low-voltage capacitance (2) also is made up of one group of cylindric capacitance plate that organic insulation film band closely is fixed on high-voltage capacitance (1) outside successively, organic insulation oversheath (5) closely is fixed on the outside of whole high-voltage capacitance (1) and low-voltage capacitance (2), organic insulation full skirt (6) is fixed on outside the oversheath (5), and draw measurement terminal (7) from high-voltage capacitance (1) and low-voltage capacitance (2) connection place, draw earth terminal (8) from the other end of low-voltage capacitance.
2. according to the described dry-type voltage inductor of claim (1), it is characterized in that low-voltage capacitance (2) is to be formed in parallel with a plurality of cylindric electric capacity that organic insulation film band is done insulation and closely is fixed on high-voltage capacitance (1) outside, its capacitance is much larger than the capacitance of high-voltage capacitance (1), from the direct input power amplifier (3) of the voltage signal that takes out between measurement terminal (7) and the earth terminal (8).
3. according to claim (1) and the described dry-type voltage inductor of claim (2), it is characterized in that tubulose rigid electrode (4) can be " one " font or " U " shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99255044 CN2400881Y (en) | 1999-11-24 | 1999-11-24 | Dry voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99255044 CN2400881Y (en) | 1999-11-24 | 1999-11-24 | Dry voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2400881Y true CN2400881Y (en) | 2000-10-11 |
Family
ID=34038485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99255044 Expired - Fee Related CN2400881Y (en) | 1999-11-24 | 1999-11-24 | Dry voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2400881Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998496A (en) * | 2011-09-14 | 2013-03-27 | 北京瑞恒超高压电器研究所 | Series capacitor anti-interference layer structure and manufacturing method thereof |
| CN103093943A (en) * | 2011-11-01 | 2013-05-08 | 江苏思源赫兹互感器有限公司 | Transformer bushing |
| CN103208360A (en) * | 2013-03-21 | 2013-07-17 | 许继集团有限公司 | Electronic-type current-voltage-combined transformer for GIS (gas insulated switchgear) |
| CN113809743A (en) * | 2021-10-13 | 2021-12-17 | 恒通泰隆有限公司 | Overhead alternating current line power taking device |
-
1999
- 1999-11-24 CN CN 99255044 patent/CN2400881Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998496A (en) * | 2011-09-14 | 2013-03-27 | 北京瑞恒超高压电器研究所 | Series capacitor anti-interference layer structure and manufacturing method thereof |
| CN102998496B (en) * | 2011-09-14 | 2015-07-15 | 北京瑞恒超高压电器研究所(普通合伙) | Series capacitor anti-interference layer structure and manufacturing method thereof |
| CN103093943A (en) * | 2011-11-01 | 2013-05-08 | 江苏思源赫兹互感器有限公司 | Transformer bushing |
| CN103208360A (en) * | 2013-03-21 | 2013-07-17 | 许继集团有限公司 | Electronic-type current-voltage-combined transformer for GIS (gas insulated switchgear) |
| CN103208360B (en) * | 2013-03-21 | 2016-04-20 | 许继集团有限公司 | A kind of GIS electronic current-voltage combination transformer |
| CN113809743A (en) * | 2021-10-13 | 2021-12-17 | 恒通泰隆有限公司 | Overhead alternating current line power taking device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING STATE ELECTRICITY SIHWEI ELECTRIC POWER TE Free format text: FORMER NAME OR ADDRESS: SIWEI POWER TECHNOLOGY CO., LTD., ACADEMY OF POWER SCIENCE, LANGFANG DEVELOPMENT |
|
| CP03 | Change of name, title or address |
Address after: Dong Ji Lu 101500 Beijing Miyun Industrial Development Zone No. 2 Patentee after: Beijing Sowell Electric Power Technology Co., Ltd. Address before: 100085 Beijing Qinghe China EPRI Patentee before: Siwei Electric Power Technology Co., Ltd., Electric Power Inst., Lanfang Develop |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |