CN205211561U - High pressure star angular transformation on -load voltage -regulating transformer's winding wiring structure - Google Patents
High pressure star angular transformation on -load voltage -regulating transformer's winding wiring structure Download PDFInfo
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Abstract
The utility model relates to a high pressure star angular transformation on -load voltage -regulating transformer's winding wiring structure belongs to transformer equipment technical field. Technical scheme is: iron core, balancing winding (1), low voltage winding (2), high voltage winding two (3), regulating winding (4), switch over winding (5), one (6) from interior to exterior of high voltage winding arranges in proper order, high voltage winding two (3), regulating winding (4), switch over winding (5), high voltage winding no. 1 forms high voltage winding unit (8), no load switch (7) set up the end at the high voltage winding unit. The utility model discloses the high -pressure side can realize that angle joint mode, star connect mode of connections such as non - directly grounded of neutral point and directly grounded, and the low tension side can realize that the star connects the mode of connection of non - directly grounded of neutral point and directly grounded to each item performance of each mode of connection third harmonic route, zero phase -sequence impedance stability and symmetrical serviceability down more than this structure transformer satisfies trend direction exchange under each mode of connection.
Description
Technical field
The utility model relates to a kind of winding connection structure of high pressure variable star angle on-load tap-changing transformer, belongs to technical field of transformer equipment.
Background technology
Line voltage grade is more, and connected mode is different, and in prior art, same transformer can not be general under different electric pressures and connected mode, causes the waste of the not easy and resource of operation.
Utility model content
The utility model object is to provide a kind of winding connection structure of high pressure variable star angle on-load tap-changing transformer, and high pressure can connect the internal conversion with corner connection by star, realizes switching on the electrical network of two kinds of electric pressures; And by access and the disconnection of switching winding, realize the coupling of two line voltage grades, namely the electrical network of 4 kinds of electric pressures can be mated in high-pressure side; Normal on-load voltage regulation all can be carried out again in the basis of above function, to adapt to voltage ripple of power network.High-pressure side can realize corner connection mode, star connects neutral point indirect earthing and the direct mode of connection such as ground connection, low-pressure side can realize star and connect neutral point indirect earthing and the directly grounded mode of connection, and this structure transformer meets the properties of triple-frequency harmonics path, zero sequence impedance stability and symmetrical operation ability thereof under above each mode of connection, under meeting each mode of connection, direction of tide exchanges, and solves the problems referred to above existed in background technology.
The technical solution of the utility model is: a kind of winding connection structure of high pressure variable star angle on-load tap-changing transformer, comprise iron core, balance winding, low pressure winding, high pressure winding two, tap-changing windings, switching winding, high pressure winding one and no load switch, described iron core, balance winding, low pressure winding, high pressure winding two, tap-changing windings, switching winding, high pressure winding one are arranged in order from the inside to the outside, high pressure winding two, tap-changing windings, switching winding, high pressure winding one form high pressure winding element, and no load switch is arranged on the end of high pressure winding element.
Described high pressure winding element, balance winding, low pressure winding, no load switch are all three-phase.
The beneficial effects of the utility model are: adopt a kind of brand-new Multifunction apparatus body structure to design, high pressure can connect the internal conversion with corner connection by star, realizes switching on the electrical network of two kinds of electric pressures; And by access and the disconnection of switching winding, realize the coupling of two line voltage grades, namely the electrical network of 4 kinds of electric pressures can be mated in high-pressure side; Normal on-load voltage regulation all can be carried out again in the basis of above function, to adapt to voltage ripple of power network.High-pressure side can realize corner connection mode, star connects neutral point indirect earthing and the direct mode of connection such as ground connection, low-pressure side can realize star and connect neutral point indirect earthing and the directly grounded mode of connection, and this structure transformer meets the properties of triple-frequency harmonics path, zero sequence impedance stability and symmetrical operation ability thereof under above each mode of connection, under meeting each mode of connection, direction of tide exchanges.
Accompanying drawing explanation
Fig. 1 is elementary diagram of the present utility model;
In figure: balance winding 1, low pressure winding 2, high pressure winding 23, tap-changing windings 4, switching winding 5, high pressure winding 1, no load switch 7, high pressure winding element 8.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is described in further detail.
A kind of winding connection structure of high pressure variable star angle on-load tap-changing transformer, comprise iron core, balance winding 1, low pressure winding 2, high pressure winding 23, tap-changing windings 4, switch winding 5, high pressure winding 1 and no load switch 7, described iron core, balance winding 1, low pressure winding 2, high pressure winding 23, tap-changing windings 4, switching winding 5, high pressure winding 1 are arranged in order from the inside to the outside, high pressure winding 23, tap-changing windings 4, switching winding 5, high pressure winding 1 form high pressure winding element 8, and no load switch 7 is arranged on the end of high pressure winding element 8.
Described high pressure winding element 8, balance winding 1, low pressure winding 2, no load switch 7 are all three-phase.
In actual applications, connect the conversion with corner connection to realize high-pressure side star, introduce a no load switch 7 at every phase high voltage winding group end, serve as diverter switch, every phase winding end is connected to position 71 respectively.The position 72 of every phase S3 switch is all drawn and is connected to a bit, and this point can select direct ground connection or non_direct ground, when every phase switch is all in position 72, can form the mode of connection that three-phase star connects; Every phase head end respectively order is connected to the position 73 of out-phase switch, so when every phase switch is all in position 73, can form corresponding corner connection mode.
All being applicable to the electrical network of two kinds of electric pressures for realizing high pressure, between high pressure winding 1 and tap-changing windings 4, accessing one switch winding 5, adjust loaded switch to control it by no load switch or thickness and whether be serially connected with high pressure winding 1 end.When diverter switch is in position 12, switches winding 5 and do not access loop, when diverter switch is in position 13, switches winding 5 and access loop.Realize the number of turn adjusting high pressure winding significantly in this way, thus realize under the electrical network of two kinds of electric pressures, significantly adjusting high pressure, to adapt to line voltage.
On-load voltage regulation winding 4, between switching winding 5 and high pressure winding 23, can reduce the insulating requirements of winding all insulation to on-load voltage regulating switch, and it is general under the mode of connection of star angle to meet same on-load voltage regulating switch during corner connection mode.
When adopting Y in the system that electric pressure is lower, y, YN, y or Y, during yn connection, namely have side non_direct ground, the existence of third harmonic voltage and residual voltage is affected making the ability of transformer output waveform and asymmetric operation in this case, the line style distribution of zero sequence impedance etc. also can be influenced, therefore the utility model structure introduces balance winding 1, provides path, improve this structure to the properties under the different mode of connection and applicability to triple-frequency harmonics and zero sequence fluxes.
Claims (2)
1. the winding connection structure of a high pressure variable star angle on-load tap-changing transformer, it is characterized in that: comprise iron core, balance winding (1), low pressure winding (2), high pressure winding two (3), tap-changing windings (4), switch winding (5), high pressure winding one (6) and no load switch (7), described iron core, balance winding (1), low pressure winding (2), high pressure winding two (3), tap-changing windings (4), switch winding (5), high pressure winding one (6) is arranged in order from the inside to the outside, high pressure winding two (3), tap-changing windings (4), switch winding (5), high pressure winding one (6) forms high pressure winding element (8), no load switch (7) is arranged on the end of high pressure winding element (8).
2. the winding connection structure of a kind of high pressure variable star angle on-load tap-changing transformer according to claim 1, is characterized in that: described high pressure winding element (8), balance winding (1), low pressure winding (2), no load switch (7) are all three-phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521096838.1U CN205211561U (en) | 2015-12-28 | 2015-12-28 | High pressure star angular transformation on -load voltage -regulating transformer's winding wiring structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521096838.1U CN205211561U (en) | 2015-12-28 | 2015-12-28 | High pressure star angular transformation on -load voltage -regulating transformer's winding wiring structure |
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| Publication Number | Publication Date |
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| CN205211561U true CN205211561U (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521096838.1U Active CN205211561U (en) | 2015-12-28 | 2015-12-28 | High pressure star angular transformation on -load voltage -regulating transformer's winding wiring structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108305762A (en) * | 2017-12-20 | 2018-07-20 | 国网北京市电力公司 | Capacitance-adjustable transformer and changing pressure operation method |
| CN109637787A (en) * | 2017-10-09 | 2019-04-16 | 特变电工衡阳变压器有限公司 | Transformer excitation flow zero-sequence component suppressing method and inhibition device and transformer |
-
2015
- 2015-12-28 CN CN201521096838.1U patent/CN205211561U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109637787A (en) * | 2017-10-09 | 2019-04-16 | 特变电工衡阳变压器有限公司 | Transformer excitation flow zero-sequence component suppressing method and inhibition device and transformer |
| CN108305762A (en) * | 2017-12-20 | 2018-07-20 | 国网北京市电力公司 | Capacitance-adjustable transformer and changing pressure operation method |
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