CN102916414A - Direct current and alternating current limiting device - Google Patents
Direct current and alternating current limiting device Download PDFInfo
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- CN102916414A CN102916414A CN2012104395294A CN201210439529A CN102916414A CN 102916414 A CN102916414 A CN 102916414A CN 2012104395294 A CN2012104395294 A CN 2012104395294A CN 201210439529 A CN201210439529 A CN 201210439529A CN 102916414 A CN102916414 A CN 102916414A
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Abstract
The invention relates to a direct current and alternating current limiting device. The direct current and alternating current limiting device is composed of an electric reactor and a resistor connected in series, wherein the electric reactor is arranged inside the resistor; the electric reactor and the resistor are coaxially arranged inside and outside; the electric reactor is of a hollow structure, and is independently encapsulated in an insulating manner; the resistor is of a coil structure and is composed of resistors which are evenly distributed up and down, and each layer of resistors are vertically and coaxially arranged. Compared with the prior art, a small electric reactor and a small resistor are merged into a whole; the direct current and alternating current limiting device is simplified in device, high in reliability, low in investment cost, small in floor area of the device, relatively light in mass and convenient to install, and is an economical, reliable and practical neutral point impedance device of a transformer. The device and twice investment can be saved; the investment cost is saved; the floor area of the device is saved; the device is simple and reliable, and direct economic benefit is generated to the society.
Description
Technical field
The present invention relates to a kind of with transformer neutral point with the method that little reactance and small resistor unite two into one, especially relate to a kind of alternating-direct current current-limiting device.
Background technology
Present many 500kV transformer neutral points have been installed little reactance grounded device and have been come limiting short-circuit current.Because the transformer station of many early stage designs is reckoning without the impact of D.C. magnetic biasing originally, transformer neutral point existing space position is limited, can't install DC magnetic biasing suppression device additional when installing little reactance additional.Or at the other small resistor that installs additional again of existing little reactance.The idea that the little reactance of transformer neutral point and small resistor are united two into one proposes under these specified conditions, can satisfy simultaneously like this limiting short-circuit current and suppress the requirement of D.C. magnetic biasing.
Adopt alternating-direct current current-limiting device, can unite two into one little reactance and small resistor, make the plant area area little, cost of investment is low, easy for installation, be a kind of economy, reliable, practical transformer over-voltage and suppress the D.C. magnetic biasing device, solved simultaneously the problem of restriction single-phase short circuit current.The manufacture method that unites two into one can satisfy the ground protection requirement in the early stage design of the part transformer station limited situation in reservation place, can simplify again the design of newly-built transformer station, saves the investment budgey of relevant device, has significant economic results in society.
Summary of the invention
The purpose of this invention is to provide a kind of alternating-direct current current-limiting device that the little reactance of transformer neutral point and small resistor are united two into one, solve the existing problem of above-mentioned prior art, can simplify simultaneously equipment again, saved cost, improve device reliability, saved the plant area area.The present invention has saved twice investment of equipment, and society is produced direct economic benefit.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of alternating-direct current current-limiting device is made of reactor and the resistor of connecting, and described reactor is arranged in the resistor, and reactor and resistor are coaxial inside and outside the layout, wherein,
Reactor is hollow-core construction, adopts separately insulation to seal,
Resistor is the coil type structure, is made of uniform up and down resistance series connection, and each layer resistance is vertical coaxial arrangement.
The resistance that adopts in the described resistor is the resistance unit that is wound with inner coil and outer coil formation.
Described inner coil and outer coil are coaxial reverse coiling, are cancelled out each other in magnetic field, satisfy noninductive requirement and can bear heavy current impact.
Described inner coil and outer coil are obtained by the coiling of multiply flat conductor.
Described resistor coil is obtained by aluminium or the wire coiling that is higher than aluminium resistivity.
Described resistor adopts and can satisfy sealing separately of heavy current impact power impact.
The top of described resistor is provided with sealing of reinforced insulation performance and the insulation pseudobed that strengthens plant machinery intensity.
Described sealing as epoxy resin impregnated glass fibre sealed, and after sealing surface finish anti-aging, the anti-ultraviolet waterproof insulation coating of spraying.
Described resistor exit subnumber satisfies the quantity that the user regulates according to the D.C. magnetic biasing situation.
Resistance value and the stepping of described resistance arrange according to demand.
Compared with prior art, the present invention unites two into one little reactance and small resistor, simplified equipment, reliability is high, and cost of investment is low, and occupation area of equipment is few, quality is relatively light, easy for installation, be a kind of economy, reliable, practical transformer neutral point impedance means, can twice investment of saving equipment, save cost of investment, save occupation area of equipment, equipment is simple and reliable, and society has been produced direct economic benefit.
Description of drawings
Fig. 1 is structural representation of the present invention.
Among the figure, 1 is the resistor outlet terminal, and 2 is the resistor tap terminals, and 3 is the reactor input terminal, and 4 are the insulation pseudobed, and 5 is the resistor outer coil, and 6 is the resistor inner coil, and 7 is resistance unit, and 8 is reactor winding.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
A kind of alternating-direct current current-limiting device, its structure as shown in Figure 1, it mainly is comprised of resistor outlet terminal 1, resistor tap terminals 2, reactor input terminal 3, insulation pseudobed 4, resistance unit 7, reactor winding 8 etc.
The present invention adopts reactor winding 8 to be arranged in the resistor inner coil 6, reactor winding 8 and resistor inner coil 6 coupled in series; Resistor is comprised of some resistance units 7, resistance unit 7 is comprised of resistor outer coil 5 and resistor inner coil 6, resistor outer coil 5 and resistor inner coil 6 are coaxial reverse coiling, cancelled out each other in magnetic field, satisfy noninductive requirement and can bear heavy current impact resistor top and connect an insulation pseudobed 4, resistance coil gap and top adopt epoxy resin impregnated glass fibre to seal, and each resistance unit 7 is drawn respectively a resistor outlet terminal 1.
Resistance unit 7 adopts multiply flat type aluminum wire or other wire that is higher than aluminium resistivity to form with the positive and negative winding technology coiling without sensing mode, a resistor tap terminals 2 is drawn respectively in each unit, resistance coil gap and top adopt epoxy resin impregnated glass fibre to seal, in order to reinforced insulation performance and enhancing plant machinery intensity.Whole resistor resistance is made according to customer requirements.
The material that reactor winding 8 uses is identical with resistor, or use and the double material that melts of resistor material energy.Coil adopts the multiply continuous coiling to form, and whole coil adopts epoxy resin impregnated glass fibre to seal, and the reactor reactance value is fixed according to customer requirements.
The upper end of reactor winding 8 arranges a reactor input terminal 3, reactor winding 8 other ends are connected with resistor inner coil 6, the resistor upper unit arranges a lead-out wire terminal 1, and resistance unit 7 has respectively a leading-out terminal, can select the resistance value of different resistances.The lead-out wire terminal adopts copper aluminium (or with other material) transition row, and the upper perforate of transition row is convenient to be connected with other wire.
Among the present invention, resistor outer coil 5, resistor inner coil 6 and reactor winding 8 are air-cooled types.The little reactance of transformer neutral point and small resistor equipment can make device unite two into one after adopting the present invention, save cost, and equipment is simple, has effectively saved occupation area of equipment, has improved equipment dependability.
The present invention unites two into one reactor and resistor, and resistance coil adopts aluminium or other to be higher than the wire of aluminium resistivity, and coil winding adopts positive and negative noninductive segmentation coiling.Reactance coil adopts open-core type, and the aluminum conductor continuous coiling forms.Coil turn is definite according to resistance value and reactance value, and coil adopts epoxy resin impregnated glass fibre to seal, anti-aging, the anti-ultraviolet waterproof insulation coating of spraying after the insulating surface polishing.
Resistance coil of the present invention also can adopt other wire that is higher than aluminium resistivity or resistor disc or row, and coil winding can adopt other continous ways or the coiling of cake formula, also can fold the type coiling, and reactor winding also can adopt copper wire winding, but will guarantee the blending of bi-material.Insulating material also can adopt other high-temperature insulation material except with epoxy and the glass fibre.
In summary, after the little reactance of transformer neutral point and small resistor equipment adopted the present invention, the energy simplified apparatus was saved cost, saved and took up an area, and improved equipment dependability.Certainly, those skilled in the art in the art will be appreciated that, above-described embodiment only is that the present invention is described, and be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claim of the present invention the variation of above-described embodiment, modification etc.
Claims (10)
1. an alternating-direct current current-limiting device is characterized in that, this device is made of reactor and the resistor of series connection, and described reactor is arranged in the resistor, and reactor and resistor are coaxial inside and outside the layout, wherein,
Reactor is hollow-core construction, adopts separately insulation to seal,
Resistor is the coil type structure, is made of uniform up and down resistance series connection, and each layer resistance is vertical coaxial arrangement.
2. a kind of alternating-direct current current-limiting device according to claim 1 is characterized in that, the resistance that adopts in the described resistor is the resistance unit that is wound with inner coil and outer coil formation.
3. a kind of alternating-direct current current-limiting device according to claim 2 is characterized in that, described inner coil and outer coil are coaxial reverse coiling, is cancelled out each other in magnetic field, satisfies noninductive requirement and can bear heavy current impact.
4. according to claim 2 or 3 described a kind of alternating-direct current current-limiting devices, it is characterized in that, described inner coil and outer coil are obtained by the coiling of multiply flat conductor.
5. according to claim 2 or 3 described a kind of alternating-direct current current-limiting devices, it is characterized in that, described resistor coil is obtained by aluminium or the wire coiling that is higher than aluminium resistivity.
6. a kind of alternating-direct current current-limiting device according to claim 1 is characterized in that, described resistor adopts and can tolerate sealing separately of heavy current impact power impact.
7. a kind of alternating-direct current current-limiting device according to claim 1 is characterized in that, the top of described resistor is provided with sealing of reinforced insulation performance and the insulation pseudobed that strengthens plant machinery intensity.
8. according to claim 5 or 6 described a kind of alternating-direct current current-limiting devices, it is characterized in that, described sealing as epoxy resin impregnated glass fibre sealed, and after sealing surface finish anti-aging, the anti-ultraviolet waterproof insulation coating of spraying.
9. a kind of alternating-direct current current-limiting device according to claim 1 is characterized in that, described resistor exit subnumber satisfies the quantity that the user regulates according to the D.C. magnetic biasing situation.
10. a kind of alternating-direct current current-limiting device according to claim 1 is characterized in that, resistance value and the stepping of described resistance arrange according to demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104395294A CN102916414A (en) | 2012-11-06 | 2012-11-06 | Direct current and alternating current limiting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104395294A CN102916414A (en) | 2012-11-06 | 2012-11-06 | Direct current and alternating current limiting device |
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| CN102916414A true CN102916414A (en) | 2013-02-06 |
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| CN2012104395294A Pending CN102916414A (en) | 2012-11-06 | 2012-11-06 | Direct current and alternating current limiting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786436A (en) * | 2016-11-25 | 2017-05-31 | 国网四川省电力公司电力科学研究院 | A kind of converter power transformer neutral point installs the method that low reactance suppresses single-phase short circuit additional |
| CN109461570A (en) * | 2018-11-02 | 2019-03-12 | 珠海蓝瑞盟电气有限公司 | A kind of damping unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2306605Y (en) * | 1997-08-14 | 1999-02-03 | 张旭辉 | Excess current limiting wire-selecting apparatus for ground point of electric network |
| JP2007174879A (en) * | 2005-12-21 | 2007-07-05 | Oaks:Kk | Apparatus for reducing inrush current of transformer in flicker suppressor using reactor |
| CN201936729U (en) * | 2011-02-21 | 2011-08-17 | 华东电力试验研究院有限公司 | DC (direct current) bias magnetic suppressor |
| CN201946975U (en) * | 2011-02-23 | 2011-08-24 | 华东电力试验研究院有限公司 | Alternating-direct current current-limiting device |
| CN102420045A (en) * | 2010-09-28 | 2012-04-18 | 华东电力试验研究院有限公司 | Direct-current magnetic biasing suppressor |
-
2012
- 2012-11-06 CN CN2012104395294A patent/CN102916414A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2306605Y (en) * | 1997-08-14 | 1999-02-03 | 张旭辉 | Excess current limiting wire-selecting apparatus for ground point of electric network |
| JP2007174879A (en) * | 2005-12-21 | 2007-07-05 | Oaks:Kk | Apparatus for reducing inrush current of transformer in flicker suppressor using reactor |
| CN102420045A (en) * | 2010-09-28 | 2012-04-18 | 华东电力试验研究院有限公司 | Direct-current magnetic biasing suppressor |
| CN201936729U (en) * | 2011-02-21 | 2011-08-17 | 华东电力试验研究院有限公司 | DC (direct current) bias magnetic suppressor |
| CN201946975U (en) * | 2011-02-23 | 2011-08-24 | 华东电力试验研究院有限公司 | Alternating-direct current current-limiting device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786436A (en) * | 2016-11-25 | 2017-05-31 | 国网四川省电力公司电力科学研究院 | A kind of converter power transformer neutral point installs the method that low reactance suppresses single-phase short circuit additional |
| CN109461570A (en) * | 2018-11-02 | 2019-03-12 | 珠海蓝瑞盟电气有限公司 | A kind of damping unit |
| CN109461570B (en) * | 2018-11-02 | 2024-02-09 | 珠海蓝瑞盟电气有限公司 | Damping device |
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Application publication date: 20130206 |