CN1207567A

CN1207567A - Dry self-healing high-voltage power capacitor

Info

Publication number: CN1207567A
Application number: CN 98114201
Authority: CN
Inventors: 王毅; 常淑云; 刘雪厚; 吴波; 罗少鹏; 侯成革
Original assignee: JINZHOU POWER CAPACITOR CO Ltd
Current assignee: JINZHOU POWER CAPACITOR CO Ltd
Priority date: 1998-07-29
Filing date: 1998-07-29
Publication date: 1999-02-10
Anticipated expiration: 2018-07-29
Also published as: CN1114219C

Abstract

A dry-type self-healing high-voltage power capacitor can run down reliably and has flamproof and explosion-proof functions while voltage breakdown. It includes a casing, several dry-type self-healing capacitance cells connected electrically and terminals connected. The capacitance cells include reel cell, sprayed golden layer and electrode wire. The flamproof and explosion-proof materials is stuffed into the casing and inner fuse surrounded with the quartz sand is put in the capacitance cell and connected with the capacitance cell in series.

Description

Dry self-healing high-voltage power capacitor

The present invention relates to a kind of dry self-healing high-voltage power capacitor.

Traditional high-voltage capacitor is oil immersion aluminium foil electrode product.Because there is seepage inevitably in the existence of impregnation oils, even the danger of burning; Add and adopt hermetically sealed shell, may explode sometimes.Therefore, cause very burden for installation and use, especially be unsuitable for the higher occasion of security requirement.

In order to address the above problem, a kind of dry self-healing high-voltage power capacitor has appearred in recent years, it places several self-healing capacity cells through being electrically connected in the enclosure, potting resin in the enclosure, the metal slide block is housed on contact conductor, the gas that produces when component wear makes shell deformation, and the pulling slide block makes capacitor break away from operation.The problem of its existence is: 1, when integral body is used resin-encapsulated, even adopt vacuum encapsulation process, because the complicated emptying bubble fully of interior shape causes partial discharge bigger.2, whole with after the resin-encapsulated, if from slide block at a distance during component wear, energy is lower, causes slide block to be failure to actuate, and makes the protective device can not action message.

The object of the present invention is to provide a kind of electric pressure height, can be reliable out of service after puncturing and have a dry self-healing high-voltage power capacitor that does not fire explosion prevention function.

The present invention is achieved in that it comprises shell, realizes several dry-type self-healing capacity cells that are electrically connected and the terminal that is connected with capacity cell by lead through lead, said capacity cell comprises by rolling the element body that element, gilding layer, contact conductor constitute, its special character is to be filled with the explosion-proof filler that do not fire in the enclosure, in capacity cell, be placed with the interior fuse of connecting with capacity cell, be filled with quartz sand around interior fuse, the metalized film in the said capacity cell is for many string films and constitute inner series electric capacity.

Above-mentioned dry self-healing high-voltage power capacitor is set with shielding cap on the upper and lower gilding layer in capacity cell, fall to prevent gilding layer glue.

Above-mentioned dry self-healing high-voltage power capacitor is set with heat-shrink tube on said lead and contact conductor, to improve local discharging level and insulating capacity.

Above-mentioned dry self-healing high-voltage power capacitor is placed with fin in the enclosure, and said capacity cell is fixed on the fin.

Advantage of the present invention:

1, owing to the capacity cell of this capacitor inside is made up of inner series electric capacity, therefore, its electric pressure height, rated voltage is higher than 1000V, thereby has reduced the series connection quantity of whole set of pieces, has greatly improved the reliability of capacitor.

2, place in the capacity cell in fuse and be filled with quartz sand with arc extinguishing effect, when capacity cell punctures, can be out of service reliably, and the generation of the phenomenon of avoiding restriking.

3, be full of the compressible explosion-proof filler that do not fire in the space of whole casing, made the unit inner air,, also can not burn even temperature surpasses polyacrylic burning-point almost by emptying.In addition, the explosion-proof filler that do not fire can absorb most energy, therefore, can not blast.

4, on gilding layer, be set with shielding cap, gilding layer is played a protective role, and can further reduce loss, minimizing capacitance loss, the anti-ability of shoving of raising.

5, suit heat-shrinkable tube on whole leads and contact conductor has improved local discharging level and insulating capacity greatly.

6, because capacity cell is fixed on the fin, perfect heat-dissipating, temperature rise are low.

7, because this capacitor is a dry construction, therefore, volume is little, in light weight, non-maintaining.

The drawing explanation:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the A portion cutaway view Amplified image of Fig. 1;

Fig. 3 is that the E of B portion of Fig. 1 is to enlarged drawing;

Fig. 4 is the structural representation of capacity cell among Fig. 1;

Fig. 5 is the expansion schematic diagram that rolls element (three inner series electric capacity) among Fig. 4;

Fig. 6 is that Fig. 4 is the expansion schematic diagram that rolls element (two inner series electric capacity);

Fig. 7 is a C portion cutaway view Amplified image among Fig. 4;

Fig. 8 is a D portion cutaway view Amplified image among Fig. 4;

Provide embodiments of the invention below in conjunction with accompanying drawing;

As Fig. 1,2, shown in 3, the present invention has a shell 2, at shell 2 tops terminal 1 is installed, in shell 2, be placed with the capacity cell 4 that several are electrically connected by lead 9 realizations, and capacity cell 4 is placed on the fin 5 and it is fixing to pass through adhesive tape 11, said fin 5 is stuck on the sidewall of shell 2, in shell 2, be filled with vermiculite or perlite 6, and separate with shell 2 tops by the division board 3 that is installed on shell 2 sidewalls, on lead 9, be set with heat-shrinkable tube 10, be placed with metal connecting piece 8 in the junction of lead 9, on metal connecting piece 8, be set with double-deck heat-shrinkable tube 7.

Said capacity cell structure is shown in Fig. 4-8, it have a skeleton 43 ', skeleton 43 ' on roll element 43, the said element 43 that rolls comprises metalized film 431, aluminium foil 432 and polypropylene film 433, constitute main capacitance and aluminium foil electric capacity respectively, metalized film 431 wherein is many string films, be that electric isolating bar 431A is arranged on the coating, making coating is the multistage pole plate, two coating constitute the pole plate of many group series connection, coating constitutes three groups of pole plates among Fig. 5, and coating constitutes two groups of pole plates among Fig. 6, thereby forms inner series electric capacity.Skeleton 43 ' in be placed with in fuse 44 (also can be placed in the element shell), and be filled with quartz sand 45, use rubber cushion 41 at skeleton 43 ' two ends, 46 seal, fuse 44 is connected on the electrode of this element 4 in said, roll element 43 on, gilding layer 47 is arranged on the lower surface, make main capacitance and the parallel connection of aluminium foil electric capacity, and draw two contact conductors 40, on contact conductor 40, be set with heat-shrink tube 401, to improve insulation and local discharging level, will be soaked with one deck oil film with the element body surface that upper-part constitutes again, on gilding layer 47, be set with shielding cap 48, be placed on again in the shell 49, fill can material-resin 42 therebetween.

According to the requirement of electric pressure, through calculating, the metalized film 431 in the above-mentioned capacity cell 4 can have several electric isolating bars that staggers mutually, to form many string datas structure.

Claims

1, a kind of dry self-healing high-voltage power capacitor, comprise shell, realize forming several dry-type self-healing capacity cells that are electrically connected and the terminal that is connected with capacity cell by lead through lead, said capacity cell comprises by rolling the element body that element, gilding layer, contact conductor constitute, it is characterized in that, be filled with the explosion-proof filler that do not fire in the enclosure, in capacity cell, be placed with the interior fuse of connecting with capacity cell, around interior fuse, be filled with quartz sand, and the metalized film in the capacity cell is many string films and constitutes inner series electric capacity.

2, dry self-healing high-voltage power capacitor according to claim 1 is characterized in that, is set with shielding cap on the upper and lower gilding layer in capacity cell.

3, dry self-healing high-voltage power capacitor according to claim 1 and 2 is characterized in that, is set with heat-shrink tube on said lead and contact conductor.

4, dry self-healing high-voltage power capacitor according to claim 1 is characterized in that, is placed with fin in the enclosure, and said capacity cell is fixed on the fin.