CN103680878A - 20kV and 35kV high-voltage dual-voltage transformer - Google Patents
20kV and 35kV high-voltage dual-voltage transformer Download PDFInfo
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- CN103680878A CN103680878A CN201310739647.1A CN201310739647A CN103680878A CN 103680878 A CN103680878 A CN 103680878A CN 201310739647 A CN201310739647 A CN 201310739647A CN 103680878 A CN103680878 A CN 103680878A
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Abstract
The invention discloses a 20kV and 35kV high-voltage dual-voltage transformer. High-voltage windings comprise a first winding, a second winding and a third winding, wherein the ratio of the number of turns of the first winding, to the number of turns of the second winding, and to the number of turns of the third winding is 15:15:5, the two ends of the first winding are connected with an A1 end and an A3 end respectively, the two ends of the second winding are connected with an A2 end and an A4 end respectively, and the two ends of the third winding are connected with an X end and the A4 end respectively; the transformer further comprises a dual-voltage switch with two stations, and the dual-voltage switch is connected with the A1 end, the A2 end, the A3 end and the A4 end at the first station and connected with the A2 end and the A3 end at the second station. According to the 20kV and 35kV high-voltage dual-voltage transformer, a power grid of two power distribution voltages of 20kV and 35 kV can be supported by one set of equipment, and therefore the 20kV and 35kV high-voltage dual-voltage transformer can work before or after the power grid is transformed and does not need to be replaced, and capital is saved.
Description
Technical field
The present invention relates to field transformer, particularly a kind of transformer of supporting 20kV and two kinds of distribution voltages of 35kV.
Background technology
What the medium voltage distribution network system of China mainly adopted at present is 35kv electric pressure.And adopt 20kV distribution voltage can improve power supply capacity, minimizing land seizure amount, reduce construction investment, reduce the wastage and improve quality of voltage.Construction and enforcement along with national city net, the upgrading of rural power grids, add the development of each large electrical network, and developed area has 20kV operation of power networks (as Jiangsu and zhejiang and other places district).But some unit and regional former 35kV electric power system are still needed a period of time to 20kV transition, are badly in need of again transformer, can only first use 35kV transformer in the transitional period, are replaced by 20kV transformer after transition completes again, and this has just caused the significant wastage of fund.
Summary of the invention
The object of the present invention is to provide the two voltage transformers of a kind of 20kV and 35kV high pressure, can between 20kV and two kinds of distribution voltages of 35kV, switch, thus saving fund.
Technical scheme of the present invention is as follows:
The two voltage transformers of 20kV and 35kV high pressure, its high pressure winding comprises the first winding, the second winding, the tertiary winding; The number of turn ratio of described the first winding, the second winding, the tertiary winding is 15:15:5; The two ends of described the first winding connect respectively A1 end and A3 end, and the two ends of described the second winding connect respectively A2 end and A4 end, and the two ends of the described tertiary winding connect respectively X end and A4 end; Also comprise a dual voltage switch with two stations, described dual voltage switch connects A1 end and A2 end, A3 end and A4 end at the first station, and described dual voltage switch connects A2 end and A3 end at the second station.
Useful technique effect of the present invention is:
The present invention can realize the electrical network that an equipment is supported 20kV and two kinds of distribution voltages of 35kV, thereby can work and needn't change in electric network reconstruction front and back, has realized the saving of fund.
Advantage of the present invention will provide in embodiment description partly below, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the winding diagram that the present invention is operated in 20kV.
Fig. 2 is the winding diagram that the present invention is operated in 35kV.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
As shown in Figure 1 and Figure 2, the present invention becomes three part w1, w2, w3 by high voltage winding component.The number of turn ratio of this three parts winding is w1:w2:w3=15:15:5.One end of winding w1 connects A1 end, and the other end connects A3 end.One end of winding w2 connects A2 end, and the other end connects A4 end.One end of winding w3 connects X end, and the other end connects A4 end.Also comprise a dual voltage switch K with two stations, dual voltage switch K connects A1 end and A2 end at the first station, and A3 end and A4 end; At the second station, connect A2 end and A3 end.
Design basic ideas of the present invention are that high pressure winding adopts two kinds of structures of series, parallel simultaneously, and can between cascaded structure and parallel-connection structure, switch.As shown in Figure 1, when transformer need to be operated in 20kV, dual voltage switch K is switched to the first station, adopts winding w1 and winding w2 parallel connection then to connect with winding w3, has been both 15(15)+5=20kV.As shown in Figure 2, when transformer need to be operated in 35kV, dual voltage switch K is switched to the second station, adopts winding w1, winding w2, winding w3 series connection, has been both 15+15+5=35kV.The low-pressure section that can guarantee like this transformer is constant.
Insulation system of the present invention is dressed to high voltage, to meet whole design of transformer instructions for use.The parameter of switch, voltage withstand class need meet all service requirements.High-voltage connection Cross section Design is pressed low-voltage and high-current and is selected.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive or associate without departing from the basic idea of the present invention, within all should thinking and being included in protection scope of the present invention.
Claims (1)
1. the two voltage transformers of 20kV and 35kV high pressure, is characterized in that, high pressure winding comprises the first winding, the second winding, the tertiary winding; The number of turn ratio of described the first winding, the second winding, the tertiary winding is 15:15:5; The two ends of described the first winding connect respectively A1 end and A3 end, and the two ends of described the second winding connect respectively A2 end and A4 end, and the two ends of the described tertiary winding connect respectively X end and A4 end; Also comprise a dual voltage switch with two stations, described dual voltage switch connects A1 end and A2 end, A3 end and A4 end at the first station, and described dual voltage switch connects A2 end and A3 end at the second station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310739647.1A CN103680878A (en) | 2013-12-30 | 2013-12-30 | 20kV and 35kV high-voltage dual-voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310739647.1A CN103680878A (en) | 2013-12-30 | 2013-12-30 | 20kV and 35kV high-voltage dual-voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103680878A true CN103680878A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310739647.1A Pending CN103680878A (en) | 2013-12-30 | 2013-12-30 | 20kV and 35kV high-voltage dual-voltage transformer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07211559A (en) * | 1994-01-12 | 1995-08-11 | Nariisa Imoto | Winding ratio variable transformer |
| EP1436820A1 (en) * | 2001-09-19 | 2004-07-14 | Metal Manufactures Limited | Improved transformer winding |
| CN201838436U (en) * | 2010-06-23 | 2011-05-18 | 福州天宇电气股份有限公司 | Double-voltage oil-immersed transformer |
| CN202120730U (en) * | 2011-06-24 | 2012-01-18 | 武汉振源电力设备有限公司 | Double voltage switching structure of dry-type transformer |
| CN202473566U (en) * | 2012-03-29 | 2012-10-03 | 天津天能变压器有限公司 | 6kV-10kV dual-voltage conversion input dry type power distribution transformer |
| CN202633003U (en) * | 2012-04-16 | 2012-12-26 | 湖南湘能变压器有限责任公司 | Dual voltage amorphous alloy transformer |
| CN203690075U (en) * | 2013-12-30 | 2014-07-02 | 国能子金电器(苏州)有限公司 | 20kV and 35kV high-voltage double-voltage transformer |
-
2013
- 2013-12-30 CN CN201310739647.1A patent/CN103680878A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07211559A (en) * | 1994-01-12 | 1995-08-11 | Nariisa Imoto | Winding ratio variable transformer |
| EP1436820A1 (en) * | 2001-09-19 | 2004-07-14 | Metal Manufactures Limited | Improved transformer winding |
| CN201838436U (en) * | 2010-06-23 | 2011-05-18 | 福州天宇电气股份有限公司 | Double-voltage oil-immersed transformer |
| CN202120730U (en) * | 2011-06-24 | 2012-01-18 | 武汉振源电力设备有限公司 | Double voltage switching structure of dry-type transformer |
| CN202473566U (en) * | 2012-03-29 | 2012-10-03 | 天津天能变压器有限公司 | 6kV-10kV dual-voltage conversion input dry type power distribution transformer |
| CN202633003U (en) * | 2012-04-16 | 2012-12-26 | 湖南湘能变压器有限责任公司 | Dual voltage amorphous alloy transformer |
| CN203690075U (en) * | 2013-12-30 | 2014-07-02 | 国能子金电器(苏州)有限公司 | 20kV and 35kV high-voltage double-voltage transformer |
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Application publication date: 20140326 |