CN105185589A - 35kV high-voltage power capacitor - Google Patents
35kV high-voltage power capacitor Download PDFInfo
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- CN105185589A CN105185589A CN201510345318.8A CN201510345318A CN105185589A CN 105185589 A CN105185589 A CN 105185589A CN 201510345318 A CN201510345318 A CN 201510345318A CN 105185589 A CN105185589 A CN 105185589A
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Abstract
The invention relates to a power capacitor in a 500kV substation reactive power compensation system, and specifically relates to a 35kV high-voltage power capacitor unit. The 35kV high-voltage power capacitor unit comprises an aluminum foil upper electrode plate and an aluminum foil lower electrode plate, and a plurality of flush insulation films are arranged between the aluminum foil upper electrode plate and the aluminum foil lower electrode plate. The aluminum foil upper electrode plate is arranged to the left and staggered from the insulation films, and is folded upward at the right end. The aluminum foil lower electrode plate is arranged to the right and staggered from the insulation films, and is folded upward at the left end. The strength of the maximum electric field acting on the electrodes and the polypropylene films is reduced effectively, and partial discharge of the capacitor unit is inhibited.
Description
Technical field
The present invention relates to the power capacitor in 500kV Substation Reactive-power Compensation system, specifically relate to a kind of 35kV high-voltage power capacitor.
Background technology
35kV the parallel power condenser is for the important device in the reactive compensation system of 500kV transformer station; Because reactive power compensator each in 35kV system is thrown, cut operation comparatively frequently, the parallel power condenser therefore in 500kV transformer station often bears switching overvoltage effect.Capacitor faults is caused to take place frequently, in the fault of all capacitors, bulge is that accounting example is maximum, general fuel tank varies with temperature and to expand and contraction is normal phenomenon, but when inner, partial discharge occurs, and insulating oil produces a large amount of gas, tank wall will be made to be out of shape, form obvious bulge phenomenon, the capacitor that bulge occurs can not be repaired, and can only pull down and more renew capacitor unit.
Capacitor unit is selected higher in work field intensity, and these low-quality products run under high electric field, very easily cause the fault of bulge and the action of component breakdown fuse.Actual motion shows, the position that capacity cell punctures is many in electrode edge, turning and lead-in wire and pole plate contact position, and pleat Tewo position appears in element.These local electric field strength and current density all higher, easily there is partial discharge or cross thermal burn insulation.In addition, the too high or switch of working voltage is restriked the switching overvoltage caused, and also will produce partial discharge.
Traditional not flanging hidden foil-type foil electrode, due to may loose contact between lead wire and foil electrode, and lead wire place and electrode edge electric field be concentrated, and easily partial discharge occur at lead wire place and electrode edge region; The capacitor unit that existing capacitor uses is when bearing overvoltage, and the electric-field intensity distribution that capacitor unit bears is uneven, easily partial discharge phenomenon occurs.Long-play will cause capacitor faults, directly affects effective operation of reactive compensation system.
Summary of the invention
Object of the present invention is the problems referred to above solving prior art, provide a kind of 35kV high-voltage power capacitor, the maximum field intensity that capacitor unit bears can be effectively reduced, make the Electric Field Distribution of capacitor even, can suppression capacitor partial discharge phenomenon significantly, reduce the occurrence probability that capacitor generating unit damages fault, thus improve the useful life of capacitor, to achieve these goals, the technical solution used in the present invention is as follows:
A kind of 35kV high-voltage power capacitor, it is characterized in that: comprise aluminium foil electric pole plate and aluminium foil lower electrode plate, and the concordant insulation film of some layers is provided with between described aluminium foil electric pole plate and aluminium foil lower electrode plate, described aluminium foil electric pole plate staggers with insulation film left and places, and it is upward folded at right-hand member, described aluminium foil lower electrode plate staggers with insulation film to the right and places, and upward folded at left end.
Preferably, described insulation film is three layers, is respectively ground floor insulation film, second layer insulation film and third layer insulation film from top to bottom, and the thickness of ground floor insulation film and third layer insulation film is 12 μm, and the thickness of second layer insulation film is 9 μm.
Preferably, described ground floor insulation film, second layer insulation film and third layer insulation film are polypropylene film.
Preferably, described aluminium foil electric pole plate and aluminium foil lower electrode plate are 5.3 ~ 5.5 μm.
Preferably, described aluminium foil electric pole plate is 15mm ~ 16mm in the length that right-hand member is upward folded, and the flanging width of foil electrode is 15mm ~ 16mm.
In sum, the present invention is owing to have employed above technical scheme, the present invention has following beneficial effect: when power capacitor unit is when bearing overvoltage, the electric-field intensity distribution of capacitor unit electrode and polypropylene film is even, reducing effect is in the maximum field intensity of electrode and polypropylene film effectively, the generation of capacitor unit partial discharge phenomenon can be suppressed or reduce simultaneously, to this, use this 35kV power capacitor effectively will reduce unit and damage rate of breakdown, simultaneously also extend life-span of 35kV power capacitor.
Accompanying drawing explanation
In order to be illustrated more clearly in example of the present invention or technical scheme of the prior art, introduce doing accompanying drawing required in embodiment or description of the prior art simply below, apparently, accompanying drawing in the following describes is only examples more of the present invention, to those skilled in the art, do not paying under creationary prerequisite, other accompanying drawing can also obtained according to these accompanying drawings.
Fig. 1 is the structure chart of a kind of 35kV high-voltage power capacitor of the present invention.
In figure: 1-aluminium foil electric pole plate, 2-ground floor edge film, 3-second layer edge film, 4-third layer edge film, 5-aluminium foil lower electrode plate, 6-foil electrode plate flanging place, 7-foil electrode panel edges overlapping position.
Embodiment
Below in conjunction with the accompanying drawing in example of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of 35kV high-voltage power capacitor unit, comprise aluminium foil electric pole plate 1 and aluminium foil lower electrode plate 5, and the concordant insulation film of some layers is provided with between described aluminium foil electric pole plate and aluminium foil lower electrode plate, described aluminium foil electric pole plate 1 staggers with insulation film left and places, and it is upward folded at right-hand member, described aluminium foil lower electrode plate 5 staggers with insulation film to the right and places, and upward folded at left end, described aluminium foil electric pole plate and aluminium foil lower electrode plate are 5.3 ~ 5.5 μm; Described aluminium foil electric pole plate is 15mm ~ 16mm in the length that right-hand member is upward folded, and the flanging width of foil electrode is 15mm ~ 16mm.
In the invention process, described insulation film is three layers, be respectively ground floor insulation film 2, second layer insulation film 3 and third layer insulation film 4 from top to bottom, described aluminium foil electric pole plate 1, ground floor insulation film 2, second layer insulation film 3 and third layer insulation film 4 and aluminium foil lower electrode plate 5 form the entirety of a close contact, and described ground floor insulation film, second layer insulation film and third layer insulation film are polypropylene film; The thickness of described ground floor insulation film 2 and third layer insulation film 3 is 12 μm, and the thickness of second layer insulation film 3 is 9 μm.
Three-layer polypropylene film is set between aluminium foil electric pole plate 1 and aluminium foil lower electrode plate 5, along with the increase of foil electrode electrode thickness, upper foil electrode pole plate 1 and polypropylene film stagger projection, the stagger maximum field strength at projection and foil electrode plate flanging place of lower foil electrode pole plate 5 and polypropylene film reduces gradually, and the maximum field strength of foil electrode panel edges overlapping position 7 increases gradually, the increase of foil electrode plate thickness makes the curved surface at foil electrode pole plate edge 7 and foil electrode flanging place 6 be tending towards smooth, so the Electric Field Distribution at projection and flanging place is improved, capacitor working region is goed deep into along with the increase of foil electrode electrode thickness in the tip of foil electrode panel edges overlapping position 7, causes the increase of its surface electric field intensity, the thickness of aluminium foil is between 5.3 to 5.5 μm time, and the electric field strength of foil electrode plate projection, foil electrode flanging place 6 and foil electrode panel edges overlapping position 7 is minimum, and capacitor has best partial discharge performance.
Foil electrode pole plate flanging length can directly affect pole plate coincident place field strength distribution, foil electrode panel edges overlapping position 7 maximum field strength reduces along with the increase of flanging length, when the flanging length of foil electrode pole plate is in the scope of 15mm to 16mm, the maximum field intensity of foil electrode panel edges overlapping position 7 is minimum, also save most material simultaneously, thinner polypropylene screen can reduce film local, pole plate flanging place maximum field strength, suppress the distortion of pole plate fringe field, but field intensity on the film of capacitor unit working region can be caused so larger.When first and third layer polypropylene film thickness is 15 μm and the second polypropylene film thickness is 9 μm, the field intensity on the film of capacitor working region just in time can be avoided to increase, both reduced even pole plate fringe field, reduce thin film work field intensity again.
35kV high-voltage power capacitor unit manufacture method of the present invention is as follows:
By upward folded for the left end 15mm place of aluminium foil lower electrode plate, successively polypropylene film placed on foil electrode, and stagger left, the foil electrode of lower floor is made to reserve a right projection, again the superiors' foil electrode is placed on polypropylene film, staggers left, and upward folded at right-hand member.Then whole capacitor unit winding is flattened, be made into capacitor unit, make multiple such capacitor unit, they are in parallel or be connected in series by Internal fuse, form an overall capacitor element, again with assemblings such as case shell, binding post, sleeve pipes, just can be made into the high-voltage power capacitor of a 35kV.
The foregoing is only the preferred embodiment of invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a 35kV high-voltage power capacitor, it is characterized in that: comprise aluminium foil electric pole plate and aluminium foil lower electrode plate, and the concordant insulation film of some layers is provided with between described aluminium foil electric pole plate and aluminium foil lower electrode plate, described aluminium foil electric pole plate staggers with insulation film left and places, and it is upward folded at right-hand member, described aluminium foil lower electrode plate staggers with insulation film to the right and places, and upward folded at left end.
2. a kind of 35kV high-voltage power capacitor according to claim 1, it is characterized in that: described insulation film is three layers, be respectively ground floor insulation film, second layer insulation film and third layer insulation film from top to bottom, the thickness of ground floor insulation film and third layer insulation film is 12 μm, and the thickness of second layer insulation film is 9 μm.
3. a kind of 35kV high-voltage power capacitor according to claim 2, is characterized in that: described ground floor insulation film, second layer insulation film and third layer insulation film are polypropylene film.
4. a kind of 35kV high-voltage power capacitor according to claim 1, is characterized in that: described paper tinsel electric pole plate and aluminium foil lower electrode plate are 5.3 ~ 5.5 μm.
5. a kind of 35kV high-voltage power capacitor according to claim 1, is characterized in that: described aluminium foil electric pole plate is 15mm ~ 16mm in the length that right-hand member is upward folded, the flanging width of foil electrode is 15mm ~ 16mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510345318.8A CN105185589A (en) | 2015-06-19 | 2015-06-19 | 35kV high-voltage power capacitor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510345318.8A CN105185589A (en) | 2015-06-19 | 2015-06-19 | 35kV high-voltage power capacitor |
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| CN105185589A true CN105185589A (en) | 2015-12-23 |
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| CN201510345318.8A Pending CN105185589A (en) | 2015-06-19 | 2015-06-19 | 35kV high-voltage power capacitor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298236A (en) * | 2016-09-22 | 2017-01-04 | 上海思源电力电容器有限公司 | A kind of internal tandem type capacitive component of power capacitor |
| CN107369552A (en) * | 2017-09-15 | 2017-11-21 | 宁波博恩电气有限公司 | A kind of capacitor |
| CN107610931A (en) * | 2017-09-15 | 2018-01-19 | 宁波博恩电气有限公司 | The manufacture method of reactive-load compensation capacitor |
| CN110415935A (en) * | 2019-06-03 | 2019-11-05 | 清华大学 | A High Frequency and High Voltage Transformer with Chamfered Winding |
| CN113314343A (en) * | 2021-05-28 | 2021-08-27 | 西安西电电力电容器有限责任公司 | Self-healing capacitor element wound by folding metallized film and processing method |
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| WO2003005386A1 (en) * | 2001-07-04 | 2003-01-16 | Paul Lenworth Mantock | Buffer capacitor |
| US20050277021A1 (en) * | 2004-06-14 | 2005-12-15 | Matsushita Electric Industrial Co., Ltd. | Electrochemical element |
| CN201270200Y (en) * | 2008-09-25 | 2009-07-08 | 合阳电力电容器制造有限责任公司 | Electric power capacitance element |
| CN103077827A (en) * | 2011-10-25 | 2013-05-01 | 上虞电力电容器有限公司 | Internal tandem-type capacity cell of foil-type power capacitor |
| CN205069384U (en) * | 2015-06-19 | 2016-03-02 | 广西电网有限责任公司电力科学研究院 | Anti highly compressed power capacitor component |
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2015
- 2015-06-19 CN CN201510345318.8A patent/CN105185589A/en active Pending
Patent Citations (5)
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| WO2003005386A1 (en) * | 2001-07-04 | 2003-01-16 | Paul Lenworth Mantock | Buffer capacitor |
| US20050277021A1 (en) * | 2004-06-14 | 2005-12-15 | Matsushita Electric Industrial Co., Ltd. | Electrochemical element |
| CN201270200Y (en) * | 2008-09-25 | 2009-07-08 | 合阳电力电容器制造有限责任公司 | Electric power capacitance element |
| CN103077827A (en) * | 2011-10-25 | 2013-05-01 | 上虞电力电容器有限公司 | Internal tandem-type capacity cell of foil-type power capacitor |
| CN205069384U (en) * | 2015-06-19 | 2016-03-02 | 广西电网有限责任公司电力科学研究院 | Anti highly compressed power capacitor component |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106298236A (en) * | 2016-09-22 | 2017-01-04 | 上海思源电力电容器有限公司 | A kind of internal tandem type capacitive component of power capacitor |
| CN107369552A (en) * | 2017-09-15 | 2017-11-21 | 宁波博恩电气有限公司 | A kind of capacitor |
| CN107610931A (en) * | 2017-09-15 | 2018-01-19 | 宁波博恩电气有限公司 | The manufacture method of reactive-load compensation capacitor |
| CN110415935A (en) * | 2019-06-03 | 2019-11-05 | 清华大学 | A High Frequency and High Voltage Transformer with Chamfered Winding |
| CN113314343A (en) * | 2021-05-28 | 2021-08-27 | 西安西电电力电容器有限责任公司 | Self-healing capacitor element wound by folding metallized film and processing method |
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Application publication date: 20151223 |