CN200997333Y - Dry high-voltage current mutual inductor of capacitant insulating - Google Patents
Dry high-voltage current mutual inductor of capacitant insulating Download PDFInfo
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- CN200997333Y CN200997333Y CN 200720002306 CN200720002306U CN200997333Y CN 200997333 Y CN200997333 Y CN 200997333Y CN 200720002306 CN200720002306 CN 200720002306 CN 200720002306 U CN200720002306 U CN 200720002306U CN 200997333 Y CN200997333 Y CN 200997333Y
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Abstract
The utility model relates to a dry capacitance-insulation and high-voltage current mutual inductor, which comprises a base provided with a secondary winding and a base support that comprises a U-shaped tubular structure composed by the primary winding. The device is characterized in that the U-shaped tubular structure comprises a mechanical reinforced layer, a primary winding tubular external conductor layer, a capacitance multi-layer voltage dividing main insulation layer, a sealing insulation layer and the sleeve umbrella side layer from inside outward; the two U-shaped ends of the primary winding are respectively provided with and wiring-in and wiring-out terminals and the base is provided with the wiring terminal of the secondary winding.
Description
Affiliated technical field
The utility model relates to a kind of high-tension current inductor, particularly adopts capacitor type insulating, is used for the Dry Type High Tension Current Transformer of outdoor or indoor transformer station.
Background technology
At present, for solving the seepage oil problem of 35kV and above filling type high-tension current inductor, the domestic high-tension current inductor that the dry type capacitor type insulating occurred adopting discloses this Dry Type High Tension Current Transformer such as CN2362184Y that announces respectively on February 2nd, 2000 and on September 13rd, 2000 and the Chinese utility model patent specification of CN2396494Y.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.Yet this current transformer also has its technical weak point, adopts solid conducting rod (single hop) such as its winding conductor, and its kelvin effect is more serious, is unsuitable for big current conditions.And, its winding will pass from " the tubulose rigid backbone made from steel alloy or other non-magnet_conductible material " endoporus, its sectional area obviously can be restricted, and promptly rated primary current can not be too big, and this often can not satisfy the requirement that present substation capacity constantly enlarges.In fact, monotropic more less than current transformer consumption, winding of most customer requirements can change current ratio by connection in series-parallel, and two in the market no-load voltage ratio dry-type current transformers all adopt many wires to penetrate in the alloy pipe, change current ratio by its connection in series-parallel.But this structure can not make full use of original just comparatively narrow and small steel tube inner hole, is difficult to make big electric current, two no-load voltage ratio dry-type current transformer.Accompanying drawing 1 is winding conductor of prior art dry-type current transformer (4 leads) poling schematic diagram.As can be seen from the figure, steel duct has greatly, and sectional area does not use, in this case, the sectional area that wants to increase lead just must add the diameter of big steel pipe, will increase the consumption (because the consumption of insulating material and diameter square be directly proportional) of insulating material so greatly, reduce cost performance of product.Simultaneously, when instrument transformer passes through the system short-circuit electric current, exist sizable electric power between these 4 leads, damage is wrapped in the section insulation 2 above them easily, thereby its dynamic and thermal stability performance is also relatively poor.
Summary of the invention
The purpose of this utility model is to improve the shortcoming of prior art, and a kind of dry type capacitor type insulating high-tension current inductor is provided.
A winding conductor of this high-tension current inductor is that profile curves one group of coaxial pipe " U " font, that be sleeved on successively (innermost layer can be solid pole) with mechanical strengthening course, because the pipe conductor does not have serious kelvin effect, therefore save non-ferrous metal, and coaxial arrangement can make full use of the space, there is not interactional electric power between coaxial conductor, therefore make the dry-type current transformer of big electric current, two no-load voltage ratios easily, can solve the problem of existing dry-type current transformer dynamic thermal stability difference simultaneously.
The technical scheme in the invention for solving the technical problem is: a kind of dry type capacitor type insulating high-tension current inductor, comprise the casing that is provided with secondary winding and base and by the U-shaped tubular structure that winding constitutes that comprises of base support, it is characterized in that the U-shaped tubular structure is from the inside to the outside by comprising mechanical strengthening course, the outer section of a winding tubulose conductor layer, the multistage dividing potential drop main insulating layer of capacitor type, the sealed insulation layer, sheath full skirt layer is nested with together and constitutes, two terminations at the U-shaped of a winding are respectively equipped with into, outlet terminal is provided with the binding post of secondary winding on base.
The utility model tubulose outer section conductor layer of the copper layer of copper coating stainless steel pipe as a winding, stainless steel layer is as mechanical strengthening course, a winding inner segment conductor (copper pipe or copper rod) that is enclosed with section insulation is penetrated the endoporus of copper coating stainless steel pipe, the coaxial pipe of this group (innermost layer can be solid pole) is curved " U " font.Outside " U " font tubulose, make one deck semi-conductive buffer layer on the section conductor layer, make overall structure carry out the transition to insulator from conductor from inside to outside; Make the capacitor type main insulating layer then.The capacitor type main insulating layer alternately is made of thin film dielectric material and capacitance plate; These capacitance plates are made by metal forming or semiconductive film.After the capacitor type main insulating layer completes; with organic combined insulated pipe with its good seal; and make reinforced layer in the bottom of " U " of good seal shape structure, in order to reduce because " U " shape structure self gravitation and fastening force is installed is delivered to pressure on the main insulating layer is protected insulating barrier.Winding of " U " shape (being called winding assembly one time) bottom of carrying out insulation and good seal is with secondary coil, and secondary coil is installed in the casing, and one time winding assembly is fixed on the cabinet base, and the part of stretching out casing is stained with the silicone rubber jacket of band full skirt.
Do not meet the rated current requirement in that the copper layer cross section of copper coating stainless steel pipe is long-pending, or stainless steel layer is not when meeting mechanical reinforcement requirement, can adopt following replacement scheme: use the satisfactory copper pipe of sectional area as the outer section of tubulose conductor layer, with the satisfactory stainless steel tube of intensity as mechanical reinforcement pipe, and it is assembled into one, Alloy instead of Copper coating stainless steel pipe.
If a not segmentation of winding then can be together in parallel inner segment conductor and the outer section of tubulose conductor layer as one section use; Also can cancel the inner segment conductor, keep the outer section of tubulose conductor layer, this is that the waste non-ferrous metal increases cost because inner segment conductor kelvin effect serious when contact rod (particularly use solid) under the same rated current, adopt bigger cross-sectional area of conductor long-pending.When not having the inner segment conductor, the utility model also has a tangible advantage than prior art, that is: eddy-current heating is few.This be because, stainless steel tube can not be fully magnetic conduction not, prior art penetrates its endoporus with Ampereconductors, stainless steel tube can generate heat because of eddy current effect, particularly when electric current greatly the time.The sectional area that suitably increases Ampereconductors also can head it off, but can increase cost.Take into account above-mentioned kelvin effect and eddy current effect, the utility model current transformer can suitably reduce the consumption of non-ferrous metal.
From the above, the utility model is further characterized in that described mechanical strengthening course is a hollow tube, wherein is equipped with winding inner segment conductor one time; Reinforced layer is established in the bottom of described U-shaped tubular structure, and described reinforced layer is tubulose or works the annular groove shape of holding a winding effect of U-shaped tubulose; The outer section of described winding tubulose conductor layer outer wrapping semiconductor buffer layer; Be provided with the section insulation layer between described inner segment conductor and mechanical strengthening course, described section insulation layer is wrapped on the inner segment conductor; Two terminations of the U type of a described winding are respectively equipped with the splicing ear that winding tubulose conductive layer and inner segment conductor are connected into parallel connection or be connected in series; Same end splicing ear is connected to form winding tubulose conductive layer by conducting strip and the inner segment conductor is connected in parallel; Or different ends are connected in series being connected to form winding tubulose conductive layer and inner segment conductor between winding tubulose conductive layer and inner segment conductor across two terminals of U type by conducting strip; Be respectively equipped with rainhat on two terminations of described U type, wherein the terminal that is connected in series of each termination stretches out rainhat towards another termination, describedly stretches out rainhat into and out of line terminals; Two terminations of described U-shaped are across being provided with the strip cap that hides rain retaining ash; Described mechanical strengthening course is a stainless steel tube, and the outer section of a winding tubulose conductor layer is that copper overlays on and realizes on the stainless steel tube or be copper pipe; The multistage dividing potential drop main insulating layer of described capacitor type alternately is made of thin film dielectric material and capacitance plate, and described capacitance plate is made by metal forming or semiconductive film; Described sealed insulation layer is organic combined insulated sealed tube; Described sheath full skirt layer stretches out the periphery of casing part at the sealed insulation layer for the silicone rubber jacket secure bond of band full skirt.
The beneficial effects of the utility model are: profile is " U " font, be sleeved on together winding conductor of coaxial pipe (innermost layer can be solid pole) shape successively has the advantage that kelvin effect is weak, the cross section utilance is high, and there is not interactional electric power between coaxial conductor, therefore saved non-ferrous metal, make the dry-type current transformer of big electric current, two no-load voltage ratios easily, improved the dynamic thermal stability of dry-type current transformer simultaneously.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Accompanying drawing 1 is a winding conductor poling of a prior art dry-type current transformer schematic diagram.
Accompanying drawing 3 is the utility model dry-type current transformer tape insulation and winding assembly schematic diagram of good seal " U " shape.
Accompanying drawing 4 is the utility model dry-type current transformer (a time winding divides two sections) schematic diagrames.
Accompanying drawing 5 is the utility model dry-type current transformer (winding is a single hop) schematic diagrames.
1. alloy pipes among the figure, 2. section insulation, 3. a winding conductor (electric wire), 4. Lang Fei space, cross section, 11. a winding inner segment conductor (pipe or pole), 12. section insulations, 13. mechanical enhancement layers, 14. the outer section of winding tubulose conductor layer, 15. the semi-conductive buffer layer, 16. capacitor type main insulating layers, 17. sealed insulation layers, 18. bottom reinforced layer, 19. rain cover, 20. into and out of line terminals, 21. intersegmental terminals in parallel, 22. intersegmental series terminal, 23. the parallel conductance sheet, 24. series connection conducting strips, 25. sheath full skirt layers, 26. secondary coil, 27. casings and base.
Embodiment
Fig. 2 is winding conductor of the utility model dry-type current transformer and mechanical strengthening course schematic cross-section.In Fig. 2, a winding inner segment conductor (11) can be copper pipe or copper rod, and its sectional area is determined according to size of current; The coated outside section insulation (12) of inner segment conductor (11), its dielectric strength is 5kV; Machinery strengthening course (13) and the copper coating stainless steel pipe of tubulose outer section conductor layer (14) for being combined with each other; If amassing, the copper layer cross section of copper coating stainless steel pipe do not meet the rated current requirement, or stainless steel layer is not when meeting mechanical reinforcement requirement, can adopt following replacement scheme: use the satisfactory copper pipe of sectional area as the outer section of tubulose conductor layer (14), with the satisfactory stainless steel tube of intensity as mechanical strengthening course (13), and it is assembled into one, Alloy instead of Copper coating stainless steel pipe; A winding inner segment conductor (11) that will be enclosed with section insulation (12) penetrates the endoporus of mechanical strengthening course (13), has so just finished the assembling of one group of coaxial pipe (innermost layer can be solid pole).
Fig. 3 is the utility model dry-type current transformer tape insulation and winding assembly schematic diagram of good seal " U " shape.Among Fig. 3, innermost layer partly is the above-mentioned one group of coaxial pipe (innermost layer can be solid pole) that is curved " U " font.Section conductor layer (14) is gone up and is made one deck semi-conductive buffer layer (15) outside " U " font tubulose, makes capacitor type main insulating layer (16) then.The capacitor type main insulating layer alternately is made of thin film dielectric material and capacitance plate; These capacitance plates are made by metal forming or semiconductive film.After capacitor type main insulating layer (16) completes, with organic combined insulated sealed tube (17) with its good seal, and make the bottom reinforced layer (18) of fiberglass in the bottom of " U " of good seal shape structure, described reinforced layer is tubulose or works the annular groove shape of holding a winding effect of U-shaped tubulose, in order to reduce the pressure that main insulation is born.So just finished the winding of " U " shape (being called winding assembly one time) that has capacitor type main insulation and good seal.
Fig. 4 is the utility model dry-type current transformer (a time winding divides two sections) schematic diagram.An above-mentioned winding assembly is fixed on the cabinet base (27), in a winding assembly bottom suit secondary winding (26) and be fixed in the casing (27); Stretch out the part suit of casing and the silicone rubber jacket full skirt layer (25) of secure bond band full skirt; The top of a winding assembly is installed into, outlet binding post (20), also, series wiring terminal (21,22), also, the series connection conducting strip (23,24), rain cover (19) on the back cover, the utility model dry type that so just completed capacitor type insulating high-tension current inductor.
Among Fig. 4, two sections Primary Conductor of current transformer link together by intersegmental terminal in parallel (21) and parallel conductance sheet (23), are in the parallel running state.When two sections conductor series operations of needs, parallel conductance sheet (23) is unloaded, with series connection conducting strip (24) intersegmental series terminal (22) is coupled together then, thereby constitute the series operation mode.
When a not segmentation of winding, can adopt mode shown in Figure 4, inner segment, the outer section of tubulose conductor layer are together in parallel as one section use, do not need intersegmental series terminal (22), intersegmental series connection conducting strip (24).So just being equivalent to a winding is single hop.The current transformer that also can to take the mode shown in the accompanying drawing 5 to make winding be single hop.
Fig. 5 is the utility model dry-type current transformer (winding is a single hop) schematic diagram.Among Fig. 5, winding assembly is actual to be exactly cancellation inner segment conductor (11) and section insulation (12) among Fig. 3, and all the other are constant.Winding assembly of this simplification and casing and base (27), secondary winding (26), silicone rubber jacket (25), turnover line terminals (20), rainhat (19) etc. are fitted together the utility model dry-type current transformer that so just completed (winding is a single hop).Also can hide the grey strip cap of rain retaining across being provided with, with the shading wind and rain dust in two terminations of U-shaped.
Copper pipe described in this specification, copper rod etc. play electric action, can use aluminium substitution.
In sum, the utility model can utilize simple structural design, makes that this novel product effect is remarkable, and performance significantly improves, and significantly increase useful life.High-tension current inductor is the dry type insulation, does not have oil, no gas, and is safe and reliable, saves non-ferrous metal, improves dynamic thermal stability.Obviously the utility model is a kind of novelty, progress and the new design with good practicality.The above is specific embodiments of the invention and the know-why used, if the equivalence of doing according to conception of the present invention changes, when the function that it produced does not exceed spiritual that specification and accompanying drawing contain yet, all should be within the scope of the invention, explanation hereby.
Claims (10)
1, a kind of dry type capacitor type insulating high-tension current inductor, comprise the base that is provided with secondary winding and by the U-shaped tubular structure that winding constitutes that comprises of base support, it is characterized in that the U-shaped tubular structure is from the inside to the outside by comprising that mechanical strengthening course, the outer section of winding tubulose conductor layer, the multistage dividing potential drop main insulating layer of capacitor type, sealed insulation layer, a sheath full skirt layer are nested with together and constitute, two terminations at the U-shaped of a winding are respectively equipped with into and out of line terminals, are provided with the binding post of secondary winding on base.
2, dry type capacitor type insulating high-tension current inductor according to claim 1 is characterized in that described mechanical strengthening course is a hollow tube, wherein is equipped with winding inner segment conductor one time.
3, dry type capacitor type insulating high-tension current inductor according to claim 2 is characterized in that being provided with the section insulation layer between described inner segment conductor and mechanical strengthening course, and described section insulation layer is wrapped on the inner segment conductor.
4, dry type capacitor type insulating high-tension current inductor according to claim 1 is characterized in that the outer section of described winding tubulose conductor layer outer wrapping semiconductor buffer layer.
5, according to claim 1 or 2 or 3 or 4 described dry type capacitor type insulating high-tension current inductors, it is characterized in that reinforced layer is established in the bottom of described U-shaped tubular structure, described reinforced layer is tubulose or works the annular groove shape of holding a winding effect of U-shaped tubulose.
6, dry type capacitor type insulating high-tension current inductor according to claim 5, two terminations that it is characterized in that the U type of a described winding are respectively equipped with the splicing ear that winding tubulose conductive layer and inner segment conductor are connected into parallel connection or be connected in series; Same end splicing ear is connected to form winding tubulose conductive layer by conducting strip and the inner segment conductor is connected in parallel; Or different ends are connected in series being connected to form winding tubulose conductive layer and inner segment conductor between winding tubulose conductive layer and inner segment conductor across two terminals of U type by conducting strip.
7, dry type capacitor type insulating high-tension current inductor according to claim 6, it is characterized in that being respectively equipped with rainhat on two terminations of described U type, wherein the terminal that is connected in series of each termination stretches out rainhat towards another termination, describedly stretches out rainhat into and out of line terminals.
8, dry type capacitor type insulating high-tension current inductor according to claim 5, two terminations that it is characterized in that described U-shaped are across being provided with the strip cap that hides rain retaining ash.
9, according to claim 1,2 or 3 or 4 described dry type capacitor type insulating high-tension current inductors, it is characterized in that described mechanical strengthening course is a stainless steel tube, the outer section of a winding tubulose conductor layer is that copper overlays on and realizes on the stainless steel tube or be copper pipe.
10, dry type capacitor type insulating high-tension current inductor according to claim 9 is characterized in that the multistage dividing potential drop main insulating layer of described capacitor type alternately is made of thin film dielectric material and capacitance plate, and described capacitance plate is made by metal forming or semiconductive film; Described sealed insulation layer is organic combined insulated sealed tube; Described sheath full skirt layer stretches out the periphery of casing part at the sealed insulation layer for the silicone rubber jacket secure bond of band full skirt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720002306 CN200997333Y (en) | 2007-01-30 | 2007-01-30 | Dry high-voltage current mutual inductor of capacitant insulating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200720002306 CN200997333Y (en) | 2007-01-30 | 2007-01-30 | Dry high-voltage current mutual inductor of capacitant insulating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200997333Y true CN200997333Y (en) | 2007-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200720002306 Expired - Lifetime CN200997333Y (en) | 2007-01-30 | 2007-01-30 | Dry high-voltage current mutual inductor of capacitant insulating |
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| Country | Link |
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| CN (1) | CN200997333Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049121A (en) * | 2014-07-02 | 2014-09-17 | 杭州务实科技有限公司 | Electronic type voltage transformer capacitance voltage dividing structure |
-
2007
- 2007-01-30 CN CN 200720002306 patent/CN200997333Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049121A (en) * | 2014-07-02 | 2014-09-17 | 杭州务实科技有限公司 | Electronic type voltage transformer capacitance voltage dividing structure |
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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: BEIJING SIFANG JIBAO ENGINEERING TECHNOLOGY CO., L Owner name: BEIJING SIFANG JIBAO AUTOMATION CO., LTD. Free format text: FORMER OWNER: BEIJING DIANKE SIWEI POWER TECHNOLOGY CO., LTD. Effective date: 20110913 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100070 FENGTAI, BEIJING TO: 100085 HAIDIAN, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110913 Address after: 100085, No. four, 9 street, Beijing, Haidian District Co-patentee after: Beijing Sifang Jibao Engineering Technology Co., Ltd. Patentee after: Beijing Sifang Jibao Automation Co., Ltd. Address before: 100070 Beijing science and Technology Park of Fengtai District Baolong apartment 2-2818 Patentee before: Beijing Dianke Siwei Power Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20071226 |