CN102543398B - Transformer for realizing voltage change through changeover of leads - Google Patents
Transformer for realizing voltage change through changeover of leads Download PDFInfo
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- CN102543398B CN102543398B CN201010605120.6A CN201010605120A CN102543398B CN 102543398 B CN102543398 B CN 102543398B CN 201010605120 A CN201010605120 A CN 201010605120A CN 102543398 B CN102543398 B CN 102543398B
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Abstract
The invention relates to a transformer for realizing voltage change through changeover of leads. The transformer comprises a high voltage bushing, low voltage bushings, a high voltage neutral point bushing, an oil storage cabinet, an oil tank, a box cover, a cooling device and a tap-changer without excitation, wherein a three-phase three-column iron core structure is arranged in the oil tank; the three-phase three-column iron core is sleeved with a low voltage winding I, a high voltage winding, a voltage adjusting winding and a low voltage winding II from inside to outside respectively; the low voltage winding I is connected in series with the low voltage winding II; the low voltage winding I is wound leftwards; the low voltage winding II is wound rightwards; the two low voltage windings are connected end to head; the head part of the low voltage winding II is arranged at the upper end; and two low voltage windings are connected with a power generator by three low voltage bushings through changeover of the leads at the upper and lower parts. According to the invention, two low voltages are realized through changeover of two sets of leads, so that the two low voltages can be guaranteed to be connected with the power generator, and the technical parameters, the field external limitations, the foundation bearings and the weight requirements of the transformer in the prior art are satisfied at the same time.
Description
Technical field
The present invention relates to technical field of transformer manufacturing, specifically a kind of changing-over by lead-in wire realizes the transformer that voltage changes.
Background technology
External transformer, as the power transmission and transforming equipment of power industry, is mostly applied to the occasions such as electric power increase-volume or spare transformer, and its transportation and installing is often subject to limitting outside place, the restriction of basic load-bearing and technical parameter etc.If employing conventional structure, is meeting under the condition of original transformer technology parameter, will cause transformer weight to increase, can not meet the requirement of on-the-spot basic load-bearing; Overall dimension increases simultaneously, can not meet the requirement of on-the-spot outer limit.Realize the change of two kinds of voltages of low pressure, need to draw six sleeve pipes, complex structure, cost is high.Therefore need to adopt special structure to realize the change of voltage, will meet simultaneously and, limit and the requirement of basic load-bearing in the place outside.The transformer that at present utilizes lead-in wire changing-over and realize two kinds of voltage transitions there is not yet report.
Summary of the invention
For above shortcomings part in prior art, the technical problem to be solved in the present invention is to provide outside a kind of technical parameter that simultaneously meets original transformer, place and limits, basic load-bearing, and the changing-over by lead-in wire realizes the transformer that voltage changes.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
The present invention realizes by the changing-over of lead-in wire the transformer that voltage changes, there is bushing, low-tension bushing, high pressure neutral bushing, oil conservator, fuel tank, case lid, cooling device and off circuit tap changer, three-phase three-column core construction is set in fuel tank, on three-phase three-column iron core, be respectively installed with from inside to outside low pressure I winding, high pressure winding, pressure regulation winding and low pressure II winding, low pressure I winding and low pressure II windings in series, low pressure I winding be left around to, low pressure II winding be right around to, two low pressure winding first and last are connected, low pressure II Winding tap is in upper end, by the changing-over that bottom goes between and top goes between, by three low-tension bushings, be connected with generator.
Described three-phase three-column iron core is by three core limbs, four three-phase transformer closed magnetic circuits that iron yoke piece becomes, there is upper and lower folder and upper and lower folder web, on upper and lower folder web, by connector, be connected with upper and lower magnetic screen respectively, with upper and lower folder common ground.Upper and lower magnetic screen is embedded.
Bushing is drawn from high pressure winding overhang; High pressure neutral bushing is positioned at low-pressure side near off circuit tap changer, and high pressure neutral bushing is vertically drawn directly and is connected with neutral point lead-in wire; The low-pressure side level that low-tension bushing is positioned at fuel tank is drawn with original transformer enclosed busbar and is connected, and low-tension bushing is connected with the low-voltage lead that low pressure Winding tap is drawn.
Oil conservator is positioned at the fuel tank top opposite side relative with bushing, is parallel to transformer long axis direction extending shaft and stretches out; Cooling device centralized arrangement is in the high-low pressure both sides of fuel tank, parallel with transformer long axis direction; Off circuit tap changer is positioned on the major axis center line of transformer; Bushing is directly drawn from fuel tank top; High pressure neutral bushing be arranged in low-pressure side with away from bushing direction; On fuel tank, have low pressure rising seat, this low pressure rising seat is cylinder mode, and end and the fuel tank of its inwall are affixed, and outer end is a low pressure rising upper flange, connecting sealed bus flange.
The present invention has following beneficial effect and advantage:
1. the present invention realizes two kinds of voltages of low pressure by carrying out changing-over between two covers lead-in wires, both can guarantee that two kinds of voltages of low pressure were connected with generator, meet outside the technical parameter, place of original transformer simultaneously limit, basic load-bearing and weight requirement.
2. the present invention is installed embedded magnetic screen additional in device body iron yoke cushion block inside, can make leakage field along the walking of silicon steel sheet rolling direction, and most of leakage field is introduced to main flux, and the loss that leakage field produces significantly reduces.
3. a low pressure rising seat level of the present invention is drawn, and has also avoided local overheating when meeting requirement of strength.
4. of the present invention research and development successfully had larger breakthrough in the design of spare transformer, met outside the technical parameter, place of original transformer limit, the load-bearing on basis, meet to greatest extent user's requirement.
Accompanying drawing explanation
Fig. 1 is transformer front view of the present invention;
Fig. 2 is the lateral plan of transformer of the present invention;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 A is nameplate winding connection schematic diagram of the present invention;
Fig. 4 B is winding connection schematic diagram of the present invention;
Fig. 5 is low-voltage lead changing-over schematic diagram of the present invention ();
Fig. 6 is low-voltage lead changing-over schematic diagram of the present invention (two);
Fig. 7 is fuel tank low-pressure side front view of the present invention;
Fig. 8 is that Fig. 7 mesolow rising seat is strengthened an iron layout partial enlarged drawing.
Wherein, 1 is transformer body; 2 is bushing; 3 is low-tension bushing; 4 is high pressure neutral bushing; 5 is oil conservator; 6 is fuel tank; 7 is cooling device; 8 is upper clamping piece; 9 is lower clamping piece; 10 is top iron yoke cushion block; 11 is bottom iron yoke cushion block; 12 is top magnetic screen; 13 is bottom magnetic screen; 14 is upper clamping piece web; 15 is lower clamping piece web; 16 is low pressure rising seat; 17 is closed bus flange; 18 is a low pressure rising seat upper flange; 19 is bottom lead-in wire; 20 is top lead-in wire; 21 is low pressure rising seat reinforcement iron; 22 is low pressure winding I; 23 low pressure winding II; 24 is low pressure II winding end head; 25 is off circuit tap changer; 26 is low pressure winding I end head.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Fig. 1～2, the present invention realizes by the changing-over of lead-in wire the transformer that voltage changes, there is bushing, low-tension bushing, high pressure neutral bushing, oil conservator, fuel tank, case lid, cooling device and off circuit tap changer, the interior three-phase three-column core construction that arranges of fuel tank 6, on three-phase three-column iron core, be respectively installed with from inside to outside low pressure winding I 22, high pressure winding, pressure regulation winding and low pressure winding II 23, low pressure winding I 22 is connected with low pressure winding II 23, low pressure winding I 22 be left around to, low pressure winding II 23 be right around to, two low pressure winding first and last are connected, low pressure winding II 23 is lifted one's head in upper end, by bottom, go between 19 and the changing-over of top lead-in wire 20, by three low-tension bushings 3, realizing two kinds of voltages of 13.8kV and 18kV is connected with generator.
In the present embodiment, low pressure winding I 22 end 26(13.8kV), in lower end, by bottom, go between and 19 form corner connections, then connect low-tension bushing 3, connection 13.8kV generator; A low pressure winding II end 24(4.2kV), in upper end, by top, go between and 20 form corner connections, then connect low-tension bushing 3, connection 18kV generator.
In the present embodiment, bushing 2 is directly vertically drawn from high pressure winding overhang; Oil conservator is positioned at the fuel tank top opposite side relative with bushing, is parallel to transformer long axis direction extending shaft and stretches out; Cooling device 7 centralized arrangement are in the both sides of fuel tank 6, parallel with transformer body 1 long axis direction, guaranteeing that under the prerequisite of external insulation distance, transformer body 1 integral layout is reasonable, outer limit size reduction makes the supporting construction of oil conservator 5, cooling device 7 more reliable simultaneously.Low-voltage lead is connected with external generator by low-tension bushing 3, the adjustment that the electric energy that generator sends passes through transformer by high-tension cable to 138kV electrical network conveying capacity.
Core construction adopts three-phase three-column structure, is become the closed magnetic circuit of this three-phase transformer by three core limbs and four iron yoke pieces.Adopt iron-core draw-board, folder and feet to guarantee the mechanical strength under clamping, the lifting of device body, compression and the short-circuit condition of lamination simultaneously.On folder from top to bottom web 14,15 unshakable in one's determination, by bolt, be connected with top, bottom magnetic screen 12,13 respectively.
Low pressure rising seat 16 is cylinder mode, and the end of its inwall and fuel tank 6 are affixed, and outer end is a low pressure rising seat upper flange 18, connecting sealed bus flange 17.
On described fuel tank 6, establish and strengthen iron 21, strengthen iron along the seat circumference that raises, material is low magnetic steel.
As shown in Figures 1 to 3, in the present invention, bushing 2 is directly drawn from fuel tank 6 tops; High pressure neutral bushing 4 be arranged in low-pressure side with away from bushing 2 directions; Oil conservator 5 is positioned at the fuel tank top opposite side relative with bushing 2, is parallel to transformer long axis direction extending shaft and stretches out; Cooling device 7 centralized arrangement are in the high and low pressure side of transformer 1, parallel with transformer 1 long axis direction; Guaranteeing that under the prerequisite of external insulation distance, transformer 1 integral layout is reasonable, outer limit size reduction makes the supporting construction of oil conservator 5, cooling device 7 more reliable simultaneously.
As shown in Fig. 4 A, 4B, 5,6, the interior three-phase three-column iron core that arranges of fuel tank 6, is respectively installed with high pressure winding, low pressure winding I 22(13.8kV on three-phase three-column iron core), pressure regulation winding, low pressure winding II 23(4.2kV); Low pressure winding I end 26 is in lower end, and by bottom, go between and 19 form corner connections, then by low-tension bushing 3, connection 13.8kV generator; A low pressure winding II end 24(4.2kV), in upper end, two low pressure windings in series connect, and by top, go between and 20 form corner connections, then by low-tension bushing 3, connection 18kV generator.While being transformed into 18kV by 13.8kV, bottom lead-in wire 19 need be untied, and changing-over goes between 20 to top.
As shown in Figure 2, embedded top, bottom magnetic screen 12,13 are housed in Double layer iron yoke cushion block 10,11, top, bottom magnetic screen 12,13 connect firmly by ground strip and upper and lower folder web 14,15, with folder common ground.
As shown in Figure 7,8, fuel tank 6 low-pressure sides have low pressure rising seat 16, are welded with low pressure rising seat and strengthen iron 21, and rising seat bottom reinforcement iron is drop-down, guarantees not produce local overheating.
Claims (10)
1. the changing-over by lead-in wire realizes the transformer that voltage changes, there is bushing, low-tension bushing, high pressure neutral bushing, oil conservator, fuel tank, case lid, cooling device and off circuit tap changer, it is characterized in that: fuel tank arranges three-phase three-column core construction in (6), on three-phase three-column iron core, be respectively installed with from inside to outside low pressure I winding (22), high pressure winding, pressure regulation winding and low pressure II winding (23), low pressure I winding (22) is connected with low pressure II winding (23), low pressure I winding (22) be left around to, low pressure II winding (23) be right around to, two low pressure winding first and last are connected, low pressure winding I end head (26) is in lower end, by bottom go between (19) form corner connection, connect again low-tension bushing (3), connect generator, low pressure winding II end head (24) is in upper end, by top go between (20) form corner connection, then connect low-tension bushing (3), connection generator.
2. by the changing-over by lead-in wire claimed in claim 1, realize the transformer that voltage changes, it is characterized in that: described three-phase three-column core construction becomes three-phase transformer closed magnetic circuit by three core limbs and four iron yoke pieces, there is upper and lower folder (8,9) and upper and lower folder web (14,15), on upper and lower folder web (14,15), by connector, be connected with upper and lower magnetic screen (12,13) respectively, with upper and lower folder (8,9) common ground.
3. by the changing-over by lead-in wire claimed in claim 2, realize the transformer that voltage changes, it is characterized in that: upper and lower magnetic screen (12,13) is for embedded.
4. by the changing-over by lead-in wire claimed in claim 1, realize the transformer that voltage changes, it is characterized in that: bushing (2) is drawn from high pressure winding overhang; High pressure neutral bushing (4) is positioned at low-pressure side near off circuit tap changer (25), and high pressure neutral bushing (4) is vertically drawn directly and is connected with neutral point lead-in wire; The low-pressure side level that low-tension bushing (3) is positioned at fuel tank (6) is drawn with original transformer enclosed busbar and is connected, and the low-voltage lead that low-tension bushing (3) is drawn with low pressure Winding tap is connected.
5. by the changing-over by lead-in wire claimed in claim 1, realize the transformer that voltage changes, it is characterized in that: oil conservator (5) is positioned at fuel tank (6) the top opposite side relative with bushing (2), is parallel to transformer long axis direction and stretches out along major axis.
6. by the changing-over by lead-in wire claimed in claim 1, realize the transformer that voltage changes, it is characterized in that: cooling device (7) centralized arrangement is in the high-low pressure both sides of fuel tank, parallel with transformer long axis direction.
7. by the changing-over by lead-in wire claimed in claim 1, realize the transformer that voltage changes, it is characterized in that: off circuit tap changer (25) is positioned on the major axis center line of transformer.
8. by the changing-over by lead-in wire claimed in claim 1, realize the transformer that voltage changes, it is characterized in that: bushing (2) is directly drawn from fuel tank (6) top.
9. by the changing-over by lead-in wire claimed in claim 1, realize the transformer that voltage changes, it is characterized in that: high pressure neutral bushing (4) be arranged in low-pressure side with away from bushing (2) direction.
10. by the changing-over by lead-in wire claimed in claim 1, realize the transformer that voltage changes, it is characterized in that: on fuel tank (6), there is low pressure rising seat (16), this low pressure rising seat (16) is cylinder mode, the end of its inwall and fuel tank (6) are affixed, outer end is a low pressure rising seat upper flange (18), connecting sealed bus flange (17).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010605120.6A CN102543398B (en) | 2010-12-24 | 2010-12-24 | Transformer for realizing voltage change through changeover of leads |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010605120.6A CN102543398B (en) | 2010-12-24 | 2010-12-24 | Transformer for realizing voltage change through changeover of leads |
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| CN102543398A CN102543398A (en) | 2012-07-04 |
| CN102543398B true CN102543398B (en) | 2014-03-12 |
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| CN201010605120.6A Active CN102543398B (en) | 2010-12-24 | 2010-12-24 | Transformer for realizing voltage change through changeover of leads |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449016B (en) * | 2016-08-31 | 2018-03-02 | 芜湖金牛电气股份有限公司 | Novel transformer and case become |
| CN110060848A (en) * | 2019-05-20 | 2019-07-26 | 保定天威保变电气股份有限公司 | A kind of converter power transformer improves the structure and its method of upper yoke lower part electric field |
| CN112259327A (en) * | 2020-10-30 | 2021-01-22 | 常州东芝变压器有限公司 | 1000kV high-voltage winding split double-coil oil-immersed power transformer |
| CN113325209A (en) * | 2020-12-02 | 2021-08-31 | 吴江变压器有限公司 | Design method of temporary sleeve outgoing line for transformer test |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599346A (en) * | 2009-04-15 | 2009-12-09 | 江苏华鹏变压器有限公司 | A kind of low-loss high-impedance electric power transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS586292B2 (en) * | 1978-11-13 | 1983-02-03 | 株式会社東芝 | transformer |
| JPS5718310A (en) * | 1980-07-08 | 1982-01-30 | Hitachi Ltd | Transformer |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599346A (en) * | 2009-04-15 | 2009-12-09 | 江苏华鹏变压器有限公司 | A kind of low-loss high-impedance electric power transformer |
Non-Patent Citations (2)
| Title |
|---|
| JP昭55-65414A 1980.05.16 |
| JP昭57-18310A 1982.01.30 |
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Effective date of registration: 20170614 Address after: 271219 Shandong city of Xintai province Xinwen Industrial Park No. 6 Liang Zhai Patentee after: Shandong TBEA Shenyang transformer electrical equipment Co. Ltd. Address before: 110144 Shenyang economic and Technological Development Zone, Liaoning Road, No. 32 Patentee before: TBEA Shenyang Transformer (Group) Co., Ltd. |
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