CN202977126U - Power transformer winding structure for eliminating harmonic wave - Google Patents
Power transformer winding structure for eliminating harmonic wave Download PDFInfo
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- CN202977126U CN202977126U CN 201220588456 CN201220588456U CN202977126U CN 202977126 U CN202977126 U CN 202977126U CN 201220588456 CN201220588456 CN 201220588456 CN 201220588456 U CN201220588456 U CN 201220588456U CN 202977126 U CN202977126 U CN 202977126U
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Abstract
The utility model relates to a power transformer winding structure for eliminating harmonic wave, and the structure comprises a three-phase primary coil and a three-phase secondary coil; the secondary coil is divided into an upper secondary winding and a lower secondary winding which are symmetric; the windings of the secondary coil are connected in a Z shape; the tail end of a Z-shaped connection three-phase neutral point is provided with a short-circuit winding; the tail end of the Z-shaped connection three-phase neutral point is respectively connected with the upper end, lower end and middle end of the short-circuit winding; and the short-circuit winding is formed by winding a shielded conductor. According to the power transformer winding structure for eliminating harmonic wave, the multiple harmonic wave of the transformer can be eliminated and suppressed by changing the structure and the connecting method of the windings, so that the impact of secondary side harmonic wave to a primary side power grid is greatly improved, and the power grid quality of the power transformer is improved.
Description
Technical field
The utility model belongs to the transformer technology field, relates to a kind of transformer winding structure and connection of Eliminate highter harmonic.
Background technology
At present, the qualities of power supply such as harmonic pollution in electric power net have three important indicators: voltage stability, wave distortion and transition shock pulse, the technical scheme of common harmonic carcellation is many, active power filtering harmonic elimination, passive filtering harmonic elimination, having externally increases device for eliminating harmonic, also have a kind of mode at the inner increase of transformer device for eliminating harmonic, because considering Cost Problems, all be not widely used in harmonic wave control.Above-mentioned device for eliminating harmonic is because cost is high, and occupied ground and economic serviceability etc. can not reach desirable harmonic elimination and energy-saving effect, and it is not very desirable causing harmonic elimination effect and economy.
The utility model content
The purpose of this utility model is in order to solve above-mentioned the deficiencies in the prior art, a kind of winding construction of novel harmonic carcellation is provided, can realize in the transformer manufacture process, the high order harmonic component of transformer be manufactured and designed, to realize the needs of high-quality mains supply.
The technical scheme that the technical problem that the utility model solves adopts is:
a kind of winding structure for power transformer of harmonic carcellation, comprise three-phase primary winding and three-phase secondary coil, it is characterized in that secondary coil divides up and down two parts symmetrical secondary winding, between the winding of above-mentioned secondary coil, (Z-type connects and claims again the meander configuration connection for Z-type connects, transformer Z-type connection is the secondary side winding of every phase to be divided into the two halves of equal turn numbers, every phase upper half connect with lower half paraphase of an other phase, form a new winding), above-mentioned Z-type connects connection three-phase neutral point end and is provided with the short circuit winding, Z-type connect to connect upper with the short circuit winding respectively of three-phase neutral point end, be connected with middle-end down.
The three-phase secondary coil adopts Z-type wiring (perhaps claiming the meander configuration wiring), be each phase coil respectively on two magnetic posts, the zero sequence magnetic flux that two phase windings produce is cancelled out each other, thereby the zero sequence impedance of Z-type grounding transformer is very little, no-load loss is low, and transformer capacity can be utilized more than 90%.The principle that the Z-type wiring reduces zero sequence impedance is: each phase at the grounding transformer tri-phase iron core has two windings that the number of turn is identical, connects respectively different phase voltages.When the grounding transformer line end added the positive and negative sequence voltage of three-phase, the magnetic potential that produces on each iron core column of grounding transformer was the vector sum of two-phase winding magnetic potential.Composite magnetic power on three iron core column differs 120 °, is one group of three-phase equilibrium amount.The three-phase magnetic flux can form flux path mutually on three iron core column, magnetic resistance is little, magnetic flux is large, induced potential is large, presents very large excitation impedance.When grounding transformer three-phase line end adds residual voltage, the magnetic potential equal and opposite in direction that two windings on each iron core column produce, opposite direction, synthetic magnetic potential is zero, there is no the zero sequence magnetic flux on the tri-phase iron core post.The zero sequence magnetic flux can only form the closed-loop path by shell and surrounding medium, and magnetic resistance is very large, and the zero sequence magnetic flux is very little, so zero sequence impedance is also very little.The winding of secondary coil connects connection three-phase neutral point end at Z-type and is provided with the short circuit winding, realizes the magnetic flux stack, then eliminates by this magnetic potential that winding produces.Adopt said structure, can realize the effect of eliminating transformer harmonic wave.
During concrete enforcement, the short circuit winding adopts the shielded conductor coiling to form.The short circuit winding of shielded conductor can effectively suppress negative-sequence current, can utilize again the ampere-turn equilibrium effect of winding to carry out filtering, makes transformer-supplied be coordinated comprehensive solution to the improvement of harmful humorous wave interference.
As preferably, above-mentioned three-phase primary winding is that the △ type connects (△ type connection claims again triangle corner connection line, and the three-phase Motor Winding Same Name of Ends is connected with non-same polarity, and phase voltage is line voltage).
The utility model power transformer harmonic elimination technology, can suppress 3 times of subharmonic and eliminate 5,7,17,19 times of subharmonic, first and second winding coupled magnetic flux and the secondary side winding circulation of simultaneously can the reduced harmonic electric current and causing thus, reduce the stray loss of transformer, can greatly improve the secondary side harmonic wave to the impact that its primary side electrical network causes, further improve and improved the power grid quality of power transformer.
The beneficial effects of the utility model are: the utility model is by changing winding construction and connection, can eliminate and suppress the multiple-harmonic of transformer, improve greatly the secondary side harmonic wave to the impact that the primary side electrical network causes, improved and improved the power grid quality of power transformer.
Description of drawings
Below in conjunction with drawings and Examples, utility model is further illustrated.
Fig. 1 is the syndeton schematic diagram of the utility model embodiment.
In figure: 1, primary winding 2, secondary coil 3, short circuit winding 21, secondary winding.
Embodiment
In Fig. 1, a kind of winding structure for power transformer of harmonic carcellation, comprise three-phase primary winding 1 and three-phase secondary coil 2, three-phase primary winding 1 connects for the △ type, 2 minutes up and down two parts symmetrical secondary windings 21 of secondary coil, between the secondary winding 21 of secondary coil 2, for Z-type connects, Z-type connects connection three-phase neutral point end and is provided with short circuit winding 3, Z-type connects connection three-phase neutral point end and is connected with the upper and lower and middle-end of short circuit winding 3 respectively, and short circuit winding 3 adopts the shielded conductor coilings to form.Three-phase secondary coil 1 adopts the Z-type wiring, be that each phase coil is respectively on two magnetic posts, the zero sequence magnetic flux that two phase windings produce is cancelled out each other, thereby the zero sequence impedance of Z-type grounding transformer is very little, the winding of secondary coil connects connection three-phase neutral point end at Z-type and is provided with the short circuit winding, realize the magnetic flux stack, then eliminate by this magnetic potential that winding produces.Adopt said structure, can realize the effect of eliminating transformer harmonic wave.The short circuit winding 3 of shielded conductor can effectively suppress negative-sequence current, can utilize again the ampere-turn equilibrium effect of winding to carry out filtering, makes transformer-supplied be coordinated comprehensive solution to the improvement of harmful humorous wave interference.
The utility model power transformer harmonic elimination technology, can suppress 3 times of subharmonic and eliminate 5,7,17,19 times of subharmonic, first and second winding coupled magnetic flux and the secondary side winding circulation of simultaneously can the reduced harmonic electric current and causing thus, reduce the stray loss of transformer, can greatly improve the secondary side harmonic wave to the impact that its primary side electrical network causes, further improve and improved the power grid quality of power transformer.
At last, it is also to be noted that, what more than enumerate is only specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from disclosed content of the present utility model all should be thought protection range of the present utility model.
Claims (3)
1. the winding structure for power transformer of a harmonic carcellation, comprise three-phase primary winding and three-phase secondary coil, it is characterized in that secondary coil divides up and down two parts symmetrical secondary winding, connect for Z-type between the winding of above-mentioned secondary coil, above-mentioned Z-type connects connection three-phase neutral point end and is provided with the short circuit winding, and Z-type connects connection three-phase neutral point end and is connected with the upper and lower and middle-end of short circuit winding respectively.
2. the winding structure for power transformer of a kind of harmonic carcellation according to claim 1, is characterized in that the short circuit winding adopts the shielded conductor coiling to form.
3. the winding structure for power transformer of a kind of harmonic carcellation according to claim 1 and 2, is characterized in that above-mentioned three-phase primary winding is that the △ type connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220588456 CN202977126U (en) | 2012-11-09 | 2012-11-09 | Power transformer winding structure for eliminating harmonic wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220588456 CN202977126U (en) | 2012-11-09 | 2012-11-09 | Power transformer winding structure for eliminating harmonic wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202977126U true CN202977126U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220588456 Expired - Lifetime CN202977126U (en) | 2012-11-09 | 2012-11-09 | Power transformer winding structure for eliminating harmonic wave |
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| CN (1) | CN202977126U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105261466A (en) * | 2015-10-20 | 2016-01-20 | 天津市天传鑫丰电气科技发展有限公司 | Novel magnetic-control adjustable reactor |
| CN106712026A (en) * | 2017-04-06 | 2017-05-24 | 湖南行知聚能源科技发展有限公司 | Harmonic monitoring and suppression system for large amount of nonlinear load users |
| CN109755005A (en) * | 2019-02-20 | 2019-05-14 | 上海电机学院 | The automatic power transformer system for inhibiting negative sequence voltage |
| CN112816840A (en) * | 2021-01-29 | 2021-05-18 | 国网陕西省电力公司电力科学研究院 | Cable line alternating current voltage withstand test method and system based on three-phase shunt reactor |
| CN114068156A (en) * | 2021-11-19 | 2022-02-18 | 广东福德电子有限公司 | Improved grounding transformer used as substation transformer |
-
2012
- 2012-11-09 CN CN 201220588456 patent/CN202977126U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105261466A (en) * | 2015-10-20 | 2016-01-20 | 天津市天传鑫丰电气科技发展有限公司 | Novel magnetic-control adjustable reactor |
| CN105261466B (en) * | 2015-10-20 | 2018-05-01 | 天津市天传鑫丰电气科技发展有限公司 | Magnetic control REgulatable reactor |
| CN106712026A (en) * | 2017-04-06 | 2017-05-24 | 湖南行知聚能源科技发展有限公司 | Harmonic monitoring and suppression system for large amount of nonlinear load users |
| CN109755005A (en) * | 2019-02-20 | 2019-05-14 | 上海电机学院 | The automatic power transformer system for inhibiting negative sequence voltage |
| CN109755005B (en) * | 2019-02-20 | 2020-09-01 | 上海电机学院 | Power transformer system capable of automatically restraining negative sequence voltage |
| CN112816840A (en) * | 2021-01-29 | 2021-05-18 | 国网陕西省电力公司电力科学研究院 | Cable line alternating current voltage withstand test method and system based on three-phase shunt reactor |
| CN112816840B (en) * | 2021-01-29 | 2023-07-21 | 国网陕西省电力公司电力科学研究院 | Cable line alternating-current withstand voltage test method and system based on three-phase shunt reactor |
| CN114068156A (en) * | 2021-11-19 | 2022-02-18 | 广东福德电子有限公司 | Improved grounding transformer used as substation transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Jiangshan City, Zhejiang city in Quzhou Province, the 324100 park open source road No. 1 Patentee after: KERUN ELECTRIC POWER TECHNOLOGY Co.,Ltd. Address before: 324100, 27, North Road, Jiangdong District, Jiangshan Economic Development Zone, Zhejiang, Quzhou Patentee before: ZHEJIANG KERUN POWER EQUIPMENT Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 324100 Jiangshan City, Quzhou, Zhejiang province Kaiyuan Road 1 Patentee after: KERUN INTELLIGENT CONTROL Co.,Ltd. Address before: 324100 Jiangshan City, Quzhou, Zhejiang province Kaiyuan Road 1 Patentee before: KERUN ELECTRIC POWER TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |
|
| CX01 | Expiry of patent term |