CN2497415Y - Dry-type high-voltage current transformer - Google Patents
Dry-type high-voltage current transformer Download PDFInfo
- Publication number
- CN2497415Y CN2497415Y CN 01207404 CN01207404U CN2497415Y CN 2497415 Y CN2497415 Y CN 2497415Y CN 01207404 CN01207404 CN 01207404 CN 01207404 U CN01207404 U CN 01207404U CN 2497415 Y CN2497415 Y CN 2497415Y
- Authority
- CN
- China
- Prior art keywords
- layer
- current transformer
- electric stress
- earth electrode
- type high
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004804 winding Methods 0.000 claims abstract description 10
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 6
- 230000004888 barrier function Effects 0.000 claims description 27
- 230000007704 transition Effects 0.000 claims description 8
- 239000011810 insulating material Substances 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 239000003989 dielectric material Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 13
- 230000005684 electric field Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000004020 conductor Substances 0.000 abstract description 2
- 239000012774 insulation material Substances 0.000 abstract description 2
- 230000008030 elimination Effects 0.000 abstract 2
- 238000003379 elimination reaction Methods 0.000 abstract 2
- 239000004945 silicone rubber Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 34
- 239000007787 solid Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 239000011229 interlayer Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009422 external insulation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Insulating Of Coils (AREA)
Abstract
The utility model discloses a dry typed high pressure current transformator which comprises a current conductor 1, an insulation layer 3, an electric stress elimination layer 4, an insulation sealed tube 5, a silicone rubber umbrella skirt 6, an earth electrode 7, a case body 9 and a secondary winding 10, etc. The utility model is characterized in that the electric stress elimination layer 4 made of high dielectric constant insulation material is tightly arranged on the outside of the insulation layer 3 and is tightly connected with the earth electrode 7. The structure improves the electric field distribution and enhances the flashover voltage of the current transformator. The pattern of the current transformator is a full-dry typed structure which has no leaking and fire dangers; and the utility model has simple structure and is suitable for mechanized production.
Description
The utility model relates to a kind of high-tension current inductor, particularly adopts solid insulation, is used for the Dry Type High Tension Current Transformer of outdoor or indoor transformer station.
At present, 35kV and above high-tension current inductor, its main insulation mainly contains three kinds: oil-impregnated paper insulation (filling type), sulphur hexafluoride (SF
6) insulation (gas-filled type), solid insulation (dry type).Filling type and gas-filled type current transformer cause seepage easily, pollute, and oil-filled mutual inductor also sets off an explosion and fire easily, for guaranteeing safe operation, need test every year, overhaul, and maintenance workload is big.For Dry Type High Tension Current Transformer has appearred in head it off, disclose a kind of like this Dry Type High Tension Current Transformer such as the Chinese utility model patent specification of the CN2362184Y of on February 2nd, 2000 bulletin.What this high-tension current inductor adopted is " U " font structure, and its major advantage is not have oil, no gas (SF
6), no porcelain, volume is little, in light weight, pollution flashover voltage is high, be convenient to installation and maintenance, reliable.This also just Dry Type High Tension Current Transformer the advantage that should possess.This current transformer is made up of conductive cores, electrode layer, insulating barrier, oversheath etc., it is characterized in that alternately looping insulating barrier, electrode layer are until end layer electrode successively outside conductive cores, and oversheath is fixed on outside the layer electrode layer of end.This type current transformer is owing to utilize capacitance structure to force all to press, efficiently solve high-tension current inductor along face voltage skewness problem, increased substantially creeping discharge voltage.Yet, when this current transformer is manufactured, need in insulating barrier, embed the metal foil electrode that is called as capacitance plate by pre-designed position, the insulation thickness between every two-layer capacitance plate is different, has only a few tenths of a mm usually.Like this, need to embed a lot of capacitance plates in the whole current transformer insulation, for example the nearly tens layers of 110kV current transformer makes insulation system quite complicated to layers up to a hundred, and this just is unfavorable for the mechanization production of current transformer.
The purpose of this utility model is to overcome the shortcoming of above prior art, and a kind of Dry Type High Tension Current Transformer is provided, and this high-tension current inductor adopts the total solids insulated with material, does not insert capacitance plate in the insulating barrier, and is simple in structure, is suitable for mechanization production.
For achieving the above object, the utility model Dry Type High Tension Current Transformer coats Ampereconductors by transition zone with solid insulating layer, the electric stress eliminating layer that the outer close installation of insulating barrier is made with the high-k solid insulating material, the electric stress eliminating layer be in earthy earth electrode and closely link to each other, utilize the bigger axial electric capacity of electric stress eliminating layer, force the insulating surface Potential distribution to trend towards even distribution, need not in insulating barrier, to wrap into capacitance plate and can improve near the purpose of the Electric Field Distribution current transformer Electric Field Distribution, particularly earth electrode equally with regard to having reached like this.
After installing the electric stress eliminating layer, insulating barrier and electric stress eliminating layer are coated and seal, install secondary winding, according to the requirement of external insulation leakage distance the silicon rubber full skirt is installed at last with the insulated enclosure material.
Adopt said structure, owing to need not to insert capacitance plate in the insulating barrier, some premium insulation materials (such as epoxy resin) that are difficult to be used for to make capacitive current transformer can be used for making the insulating barrier of the utility model high-tension current inductor, then with the electric stress eliminating layer closely cover install and get final product.
From the above, the utility model Dry Type High Tension Current Transformer is made up of Ampereconductors, transition zone, insulating barrier, insulated enclosure pipe, silicon rubber full skirt, earth electrode etc.Be characterized in: it also comprises the electric stress eliminating layer of being made by high dielectric constant insulating material, and this electric stress eliminating layer closely is installed in the outside of insulating barrier, its root and earth electrode close-coupled.
Further improve as of the present utility model, the two ends of earth electrode are outside and the close-coupled with it that bell mouth shape extends to the root of electric stress eliminating layer.After adopting this structure, more help improving near the Electric Field Distribution of earth electrode.
Further improve as of the present utility model, the coaxial pipe that the electric stress eliminating layer is made by n (n 〉=1) floor height permittivity dielectric material is formed, and the dielectric constant of every layer of pipe equates or increases successively from inside to outside.The length of the coaxial pipe of n layer is successively decreased from inside to outside successively, every layer of pipe and earth electrode close-coupled.After adopting this structure, the dielectric constant difference of different insulative medium is little, a little less than the surface charge build-up effect, helps guaranteeing that solid insulation does not puncture because of the interface charge accumulation.
In sum, the utility model has the advantages that: adopt solid material to make fully, do not insert capacitance plate in the insulating barrier, simple in structure, few to the kind restriction of solid insulating material, be suitable for mechanization production.
Below in conjunction with accompanying drawing the utility model is described in further detail.
The utility model Dry Type High Tension Current Transformer is made up of Ampereconductors 1, transition zone 2, insulating barrier 3, electric stress eliminating layer 4, insulated enclosure pipe 5, silicon rubber full skirt 6, earth electrode 7, flange 8, casing 9 and secondary winding 10 etc.Ampereconductors 1, transition zone 2, insulating barrier 3, electric stress eliminating layer 4, insulated enclosure pipe 5, earth electrode 7 etc. constitute a winding, and its basic configuration is " U " font.Ampereconductors 1 can adopt red copper bar or copper pipe, and its outer transition zone 2 can be selected different materials for use according to the mechanical performance of insulating barrier 3, the rigidity tubing that if the mechanical strength of insulating barrier 3 is relatively poor, that transition zone 2 can adopt is non-magnetic, have the semiconductive coating; If the mechanical strength of insulating barrier 3 is enough, transition zone 2 can adopt semiconductive material directly to contact with the outer surface of Ampereconductors 1 and the inner surface of insulating barrier 3.Insulating barrier 3 should be selected the high material of dielectric strength for use.Closely install electric stress eliminating layer 4 outside the insulating barrier 3, electric stress eliminating layer 4 is made by the insulating material of high-k, its shape is an asymmetric spindle as shown in the figure, or tubular (being called stress tube), or spindle (being called stress cone) waits other shape; As shown in the figure, stress-relieving interlayer 4 can be shorter than insulating barrier 3, not necessarily will extend to the end of insulating barrier 3.The root of stress-relieving interlayer 4 and earth electrode 7 close-coupled.Earth electrode 7 snugly fits into the middle part (i.e. the latter half of " U " font) of insulating barrier 3.Insulating barrier 3 and stress-relieving interlayer 4 outsides with insulated enclosure pipe 5 with its coating and sealing, insulated enclosure pipe 5 adopts soft material, such as heat-shrink tube or cold shrink tube, also can adopt hard material liner elastomeric material certainly, such as pouring into electro-insulating rubber in the expoxy glass fiber tube.Silicon rubber full skirt 6 is installed according to the requirement of external insulation leakage distance in insulated enclosure pipe 5 outsides.Secondary winding 10 is sleeved on two posts of a winding, and one time winding is fixed on the casing 9 by flange 8.
Further improve as of the present utility model, the two ends of earth electrode 7 are the outside that bell mouth shape extends to the root of electric stress eliminating layer 4, the root close-coupled of the horn mouth of earth electrode 7 and electric stress eliminating layer 4.Near the current transformer of this structure, earth electrode Electric Field Distribution is more even.
Further improve as of the present utility model, electric stress eliminating layer 4 can combine with the coaxial pipe that n (n 〉=1) floor height permittivity dielectric material is made, and the dielectric constant of every layer of pipe equates or increases successively from inside to outside.The length of the coaxial pipe of n layer is successively decreased from inside to outside successively, every layer of pipe and earth electrode 7 close-coupled.The current transformer of this structure, the dielectric constant difference of different insulative medium is little, a little less than the surface charge build-up effect, can guarantee that solid insulation does not puncture because of the interface charge accumulation.
The utility model is not limited to above-mentioned execution mode; no matter on its shape or structure, do any variation; everyly utilize high dielectric constant material to make the electric stress eliminating layer closely to be installed in insulating barrier outside, and the Dry Type High Tension Current Transformer of the root of electric stress eliminating layer and the making of earth electrode close-coupled all drops within the utility model protection range.In addition; the insulated enclosure pipe prolonged downwards and the earth electrode of " U " shape structure Lower Half is all coated; flange is installed on outside the insulated enclosure pipe; with conductor connecting flange and earth electrode; perhaps stress-relieving interlayer is pushed down, perhaps do not used casing, and adopt synthetic resin that winding, a secondary winding are cast into one with flange; all be a kind of distortion of the present utility model, all think within the utility model protection range.
Claims (4)
1. Dry Type High Tension Current Transformer, it is made up of Ampereconductors (1), transition zone (2), insulating barrier (3), insulated enclosure pipe (5), silicon rubber full skirt (6), earth electrode (7), flange (8), casing (9) and secondary winding (10) etc.It is characterized in that: it also comprises the electric stress eliminating layer of being made by high dielectric constant insulating material (4), and described electric stress eliminating layer (4) closely is installed in the outside of insulating barrier (3), the root of described electric stress eliminating layer (4) and earth electrode (7) close-coupled.
2. Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: the two ends of earth electrode (7) are the outside that bell mouth shape extends to the root of electric stress eliminating layer (4).
3. Dry Type High Tension Current Transformer as claimed in claim 1 is characterized in that: the coaxial pipe that electric stress eliminating layer (4) is made by n (n 〉=1) floor height permittivity dielectric material is formed, and the dielectric constant of every layer of pipe equates or increases successively from inside to outside.
4. Dry Type High Tension Current Transformer as claimed in claim 3 is characterized in that: the length of the coaxial pipe of n (n 〉=1) layer is successively decreased from inside to outside successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01207404 CN2497415Y (en) | 2001-03-05 | 2001-03-05 | Dry-type high-voltage current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01207404 CN2497415Y (en) | 2001-03-05 | 2001-03-05 | Dry-type high-voltage current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2497415Y true CN2497415Y (en) | 2002-06-26 |
Family
ID=33627808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01207404 Expired - Lifetime CN2497415Y (en) | 2001-03-05 | 2001-03-05 | Dry-type high-voltage current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2497415Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632827A (en) * | 2013-12-16 | 2014-03-12 | 沈阳华德海泰电器有限公司 | Plug type current transformer |
| CN103680901A (en) * | 2012-09-25 | 2014-03-26 | 成都博课启睿科技有限公司 | Double-shielded dry type mutual inductor |
| CN103680898A (en) * | 2012-09-25 | 2014-03-26 | 成都博课启睿科技有限公司 | Fixed three-phase gas-insulated transformer |
| CN103680900A (en) * | 2012-09-25 | 2014-03-26 | 成都博课启睿科技有限公司 | Double-shielded gas insulation mutual inductor |
-
2001
- 2001-03-05 CN CN 01207404 patent/CN2497415Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103680901A (en) * | 2012-09-25 | 2014-03-26 | 成都博课启睿科技有限公司 | Double-shielded dry type mutual inductor |
| CN103680898A (en) * | 2012-09-25 | 2014-03-26 | 成都博课启睿科技有限公司 | Fixed three-phase gas-insulated transformer |
| CN103680900A (en) * | 2012-09-25 | 2014-03-26 | 成都博课启睿科技有限公司 | Double-shielded gas insulation mutual inductor |
| CN103632827A (en) * | 2013-12-16 | 2014-03-12 | 沈阳华德海泰电器有限公司 | Plug type current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANDONG QILIN ELECTRIC DEPARTMENT ELECTRIC POWER Free format text: FORMER OWNER: FANG JING Effective date: 20050812 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20050812 Address after: 255086 Qi Lin Industrial Zone, Zibo Development Zone, Shandong, China Patentee after: Shandong Chilintec Electric Equipment Manufacture Co., Ltd. Address before: 100011, Beijing, Xicheng District six shop kang District 12 Building No. 3-103 Patentee before: Fang Jing |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110305 Granted publication date: 20020626 |