CN204303511U - A kind of single-phase pentastyle low noise converter transformer - Google Patents
A kind of single-phase pentastyle low noise converter transformer Download PDFInfo
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- CN204303511U CN204303511U CN201420789209.6U CN201420789209U CN204303511U CN 204303511 U CN204303511 U CN 204303511U CN 201420789209 U CN201420789209 U CN 201420789209U CN 204303511 U CN204303511 U CN 204303511U
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Abstract
The utility model discloses a kind of based on single-phase four-column type low noise converter transformer, utilize single-phase four-column type converter transformer to be connected with converter, carry out the conversion of alternating current-direct current.Described invention is connected by different winding switching forms by multiple single-phase four-column type converter transformer, is divided into two kinds of situations: the first situation is that three single-phase four-column type converter transformers form one group and connect, for back-to-back DC power transmission; The second situation is that six single-phase four-column type converter transformers are divided into two groups and connect, for extra-high voltage direct-current transmission.The Liang Ge iron core middle column of each transformer is wound with respectively 3 windings, outside iron core, winding is source side winding, and inner side winding is valve side winding, and middle winding is the Filter Winding of particular design, and it is directly connected that Filter Winding adopts triangle to connect.Single-phase four-column type low noise converter transformer of the present utility model effectively can reduce the noise of transformer, reduces harmonic wave.
Description
Technical field
The utility model relates to converter transformer field, particularly a kind of single-phase pentastyle low noise converter transformer for extra-high voltage direct-current transmission field.
Background technology
Over nearly 20 years, high voltage dc transmission technology and engineer applied thereof obtain develop rapidly in China, along with China's superhigh pressure, extra-high voltage direct-current transmission engineering continue to put into operation, in project construction process and actual moving process, also encounter many technical barriers in the urgent need to address.
In extra-high voltage direct-current transmission engineering, converter transformer generally can be transported or the restriction of setting height(from bottom), just must manage the height reducing iron core, in order to solve large-scale three-iron core column type transformer excessive height, make the problem of transport difficult, in order to make the magnetic flux in three-iron core column type keep balance after height reduction, original basis increasing by two iron cores, thus constitutes five-limb transformer.
The harmonic pollution of superhigh pressure and extra-high voltage DC transmission system and current conversion station existence thereof is serious, and still adopt at present and administer at converter transformer source side winding side installation passive filtration unit, though solution technique is ripe, effect is not satisfactory.And the AC harmonic that converter produces all flows through converter transformer, these harmonic frequencies are low, capacity large, cause converter transformer magnetic hysteresis flexible and produce noise.These noises are generally in the sensitiveer frequency band of the sense of hearing, and the conventional power transformer that therefore audible noise of converter transformer generation is not serious compared with harmonic pollution is complicated.
Carry out deep not enough for the research work of converter transformer vibration and noise aspect both at home and abroad, adopt traditional control measures, each current conversion station needs the extra fund input increasing tens million of unit, invests huge, and limited efficiency.Therefore, the mechanism produced from converter transformer vibration and noise and essence, systematically carry out the research work of reduction converter transformer vibration and noise to the cost of investment reducing DC converter station, improve the running environment of DC converter transformer, the environment friendly of General Promotion DC converter station, being conducive to the addressing of following UHVDC converter station, there is important theoretical research and engineer applied is worth to setting up environmentally friendly and energy-saving efficient DC converter station, significant.
Therefore, along with China's extra-high voltage direct-current transmission engineering and back-to-back DC networking project all-round construction and put into operation, in the urgent need to proposing a set of comprehensive effective solution that effectively can solve the problems such as the converter transformer vibration and noise existed in current DC transmission engineering is large, harmonic pollution is serious.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of single-phase pentastyle low noise converter transformer.
The technical scheme that the utility model adopts, its structure comprises five-limb transformer iron core return yoke (3) and (4), 3 iron core middle columns (1), (2), (5), (1) and (2) be wound with three windings respectively, described iron core middle column (1) outside winding (L1) is source side winding, inner side winding (L3) is valve side winding, and middle winding (L2) is Filter Winding; Described iron core middle column (2) outside winding (L4) be source side winding, inner side winding (L6) for valve side winding, middle winding (L5) be Filter Winding.
Further, described single-phase pentastyle low noise converter transformer, for extra-high voltage direct-current transmission engineering; Described single-phase its inner winding of pentastyle low noise converter transformer is divided into two groups by 6 single-phase pentastyle converter transformers and forms, and wherein 3 converter transformers are 1 group, and other 3 converter transformers are 1 group.Often organize transformer source side winding Y connection, valve side winding forms 2 different joint group y connections and d connection, and two groups of converter transformers are connected in parallel.
Wherein, described single-phase pentastyle low noise converter transformer, the Filter Winding of net side and valve side is all particular design, all connects into triangle, and corresponding connected between two, for reducing noise.
beneficial effect
The utility model is started with from converter transformer mechanism of noise generation, carries out triangle and connects to come effective filtering harmonic wave, reduce the noise of equipment by the Filter Winding of the inner particular design of converter transformer.Because this Filter Winding is made up of the zero impedance of particular design, electromotive force produced thus is almost nil, so corresponding magnetic flux decreases, magnetic flux density is also corresponding to be decreased, and noise lessens.The way structure being reduced noise by transformer itself is simple, and effective, economy is high.
Accompanying drawing explanation
Fig. 1 is single single-phase pentastyle low noise converter transformer schematic cross-section
Fig. 2 is for the single-phase pentastyle low noise converter transformer schematic cross-section in extra-high voltage direct-current transmission.
Fig. 3 is for the single-phase pentastyle low noise converter transformer winding connection schematic diagram in extra-high voltage direct-current transmission.
Label declaration: 1, transformer left iron core center pillar, 2, the right iron core middle column of transformer, 3, transformer left iron core return yoke, 4, the right iron core return yoke of transformer, 5, iron core inside transformer center pillar, L1, transformer left iron core center pillar source side winding, L2, transformer left iron core center pillar Filter Winding, column valve side winding in L3, transformer left iron core, L4, transformer right iron core middle column source side winding, L5, transformer right iron core middle column Filter Winding, L6, transformer right iron core middle column's valve side winding, A, B, C, a, b, c, a ', b ', c ' be winding draw port.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, a kind of based on single-phase pentastyle low noise converter transformer, comprise five-limb transformer iron core return yoke (3) and (4), 3 iron core middle columns (1), (2), (5), left (1) and right (2) is wound with three windings respectively, described iron core middle column (1) outside winding (L1) be source side winding, inner side winding (L3) for valve side winding, middle winding (L2) be Filter Winding; Described iron core middle column (2) outside winding (L4) be source side winding, inner side winding (L6) for valve side winding, middle winding (L5) be Filter Winding.
As shown in Figure 2, be made up of, be divided into two groups 6 single-phase pentastyle converter transformers, wherein 3 converter transformers are 1 group, and other 3 converter transformers are 1 group, and for extra-high voltage DC transmission system, two groups of converter transformers are connected in parallel; As shown in Figure 3, be source side winding Y connection, valve side winding forms 2 different joint group y connections and d connection to this inside transformer winding connection.
As shown in (a) in Fig. 3, in 3 converter transformers in the 1st group, outside the iron core middle column of iron core middle column (1) outside winding (L11) and other 2 single-phase pentastyle low noise converter transformers, winding is connected to Y shape, and each winding draws a phase, is connected with electrical network; Outside the iron core middle column of iron core middle column (2) outside winding (L14) and other 2 single-phase pentastyle low noise converter transformers, winding is connected to Y shape, each winding draws a phase, with iron core middle column (1) outside winding (L11) draw each be in parallel, access electrical network; In 3 converter transformers in the 2nd group, outside the iron core middle column of described iron core middle column (1) outside winding (L21) and other 2 single-phase pentastyle low noise converter transformers, winding is connected to Y shape, and each winding draws a phase, is connected with electrical network.Outside the iron core middle column of described iron core middle column (2) outside winding (L24) and other 2 single-phase pentastyle low noise converter transformers, winding is connected to Y shape, each winding draws a phase, with iron core middle column (1) outside winding (L21) draw each be in parallel, then in parallel with the 1st group of converter transformer source side winding, access electrical network.
As shown in (b) in Fig. 3, in 3 converter transformers in the 1st group, iron core middle column (1) median filter winding (L12) is connected to D-shaped with iron core middle column's median filter winding of other 2 single-phase pentastyle low noise converter transformers, each winding draws a phase, described iron core middle column (2) median filter winding (L15) is connected to D-shaped with iron core middle column's median filter winding of other 2 single-phase pentastyle low noise converter transformers, each winding draws a phase, iron core middle column (1) median filter winding (L12) is connected with the extraction of iron core middle column (2) median filter winding (L15) is corresponding, in 3 converter transformers in the 2nd group, iron core middle column (1) median filter winding (L22) is connected to D-shaped with iron core middle column's median filter winding of other 2 single-phase pentastyle low noise converter transformers, each winding draws a phase, iron core middle column (2) median filter winding (L25) is connected to D-shaped with iron core middle column's median filter winding of other 2 single-phase pentastyle low noise converter transformers, each winding draws a phase, iron core middle column (1) median filter winding (L22) is connected with the extraction of iron core middle column (2) median filter winding (L25) is corresponding, and then with the 1st group of converter transformer Filter Winding parallel connection.
As shown in (c) in Fig. 3, in 3 converter transformers in the 1st group, inside the iron core middle column of iron core middle column (1) inner side winding (L13) and other 2 single-phase pentastyle low noise converter transformers, winding is connected to y shape, and each winding draws a phase, is connected with rectifier.Inside the iron core middle column of described iron core middle column (2) inner side winding (L16) and other 2 single-phase pentastyle low noise converter transformers, winding is connected to y shape, each winding draws a phase, each is in parallel with iron core middle column (1) inner side winding (L13) draws, then is connected with rectifier.In 3 converter transformers in the 2nd group, inside the iron core middle column of iron core middle column (1) inner side winding (L23) and other 2 single-phase pentastyle low noise converter transformers, winding is connected to D-shaped, and each winding draws a phase, is connected with rectifier.Inside the iron core middle column of described iron core middle column (2) inner side winding (L26) and other 2 single-phase pentastyle low noise converter transformers, winding is connected to D-shaped, each winding draws a phase, with iron core middle column (1) inner side winding (L23) draw each be in parallel, and then in parallel with the 1st group of valve winding in converter transformer, then be connected with rectifier.
The utility model provides a kind of single-phase pentastyle low noise converter transformer, for extra-high voltage direct-current transmission engineering; Adopt particular design to the middle winding of converter transformer iron core middle column, by initiatively reducing transformer body noise from inside transformer, cost performance is high, and the Noise Method reducing equipment is easy, and economy is high.
Claims (3)
1. a single-phase pentastyle low noise converter transformer, is characterized in that: comprise five-limb transformer iron core return yoke (3) and (4), and 3 iron core middle columns (1), (2), (5), be wound with three windings in iron core middle column (1) and (2) respectively.
2. single-phase pentastyle low noise converter transformer according to claim 1, is characterized in that, described iron core middle column (1) outside winding (L1) be source side winding, inner side winding (L3) for valve side winding, middle winding (L2) be Filter Winding; Described iron core middle column (2) outside winding (L4) be source side winding, inner side winding (L6) for valve side winding, middle winding (L5) be Filter Winding, and Filter Winding be all zero impedance design.
3. according to claim 1 based on single-phase pentastyle low noise converter transformer, it is characterized in that, the inner winding connection mode of described single-phase pentastyle low noise converter transformer is formed by 6 single-phase pentastyle converter transformers connections, wherein 3 converter transformers are 1 group, other 3 converter transformers are 1 group, and two groups of converter transformers are connected in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420789209.6U CN204303511U (en) | 2014-12-15 | 2014-12-15 | A kind of single-phase pentastyle low noise converter transformer |
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| CN201420789209.6U CN204303511U (en) | 2014-12-15 | 2014-12-15 | A kind of single-phase pentastyle low noise converter transformer |
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| CN204303511U true CN204303511U (en) | 2015-04-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104376982A (en) * | 2014-12-15 | 2015-02-25 | 湖南华大紫光科技股份有限公司 | Single-phase five-post low-noise converter transformer and implementation method thereof |
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2014
- 2014-12-15 CN CN201420789209.6U patent/CN204303511U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104376982A (en) * | 2014-12-15 | 2015-02-25 | 湖南华大紫光科技股份有限公司 | Single-phase five-post low-noise converter transformer and implementation method thereof |
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Effective date of registration: 20210928 Address after: 410000 908, building 8, sunshine West Group, California, No. 38, Guyuan Road, Changsha high tech Development Zone, Changsha City, Hunan Province Patentee after: HUNAN HUADA ELECTRICIAN HI-TECH Co.,Ltd. Address before: 410205 No. 456, lushong Road, Lugu, Changsha high tech Development Zone, Changsha City, Hunan Province Patentee before: HUNAN HUADA UNISPLENDOUR TECHNIC Corp.,Ltd. |