CN208225684U - A kind of outgoing line device of power transformer balance winding - Google Patents
A kind of outgoing line device of power transformer balance winding Download PDFInfo
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- CN208225684U CN208225684U CN201820917213.4U CN201820917213U CN208225684U CN 208225684 U CN208225684 U CN 208225684U CN 201820917213 U CN201820917213 U CN 201820917213U CN 208225684 U CN208225684 U CN 208225684U
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- transformer
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- phase coil
- extraction tube
- box cover
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Abstract
The application discloses a kind of outgoing line device of power transformer balance winding, including transformer A phase extraction tube, transformer B phase extraction tube, transformer box cover, transformer A phase coil, transformer B phase coil and transformer C phase coil, the transformer A phase extraction tube and the transformer B phase extraction tube are respectively in the top side of the transformer box cover, the transformer A phase coil, the transformer B phase coil and the transformer C phase coil are separately positioned on the bottom of the transformer box cover, the present apparatus can easily measure the D.C. resistance of winding in transformer manufacturing factory, it can be tested at the scene, and do not have to worry when external short circuit occurs for balance winding to damage caused by transformer.The circulating current that can also be added in current transformer measurement closing triangle is reduced costs using the form for only using the extraction of two casings, while be can avoid external short circuit and being damaged caused by voltage device, and the anti-short circuit capability of transformer is enhanced.
Description
Technical field
This application involves power transformer technical fields more particularly to a kind of power transformer to balance the traditional thread binding out of winding
It sets.
Background technique
Power transformer is the device for changing alternating voltage using the principle of electromagnetic induction, and main member is primary line
Circle, secondary coil and iron core, the major function of power transformer have voltage transformation, current transformation, impedance transformation, isolation, pressure stabilizing
Deng.
With the rapid development of electric system, with the rapid development of electric system, in order to improve the power supply matter of transformer
Amount and reduction zero sequence leakage magnetic flux generated hot-spot phenomenon in transformer device structure part, are saving transformer manufacturing cost
Simultaneously, it is ensured that transformer can it is economical, reliably and securely run.Therefore delta connection balance winding transformer (especially
In high-power transformer) internal application be it is essential, delta windings can be used as balance winding in transformer to be made
With the three-phase voltage symmetry of Transformer, voltage harmonic component and current harmonics component depend on three-phase transformer
The magnetic connection of connection type, iron core determines that can transformer obtain change in magnetic flux density corresponding with grid voltage change
All higher hamonic waves of required exciting current, if three-phase transformer winding is star-like connection, neutral point and three phase supply
The neutral point of power grid connects, and zero-sequence current is only flowed in primary side, and transformer is in free state.If in the winding of star-like connection
Property point does not connect (or earth-free) with the neutral point of three phase supply power grid, since the current harmonics of 3N (N=1,2,3 ...) cannot be
Pass through in first winding, therefore, the balance winding as triangle connection can provide for 3N (N=1,2,3 ...) subharmonic current
Access improves induced electromotive force waveform, and then guarantees the output voltage of transformer close to sine wave, it is ensured that power supply quality is prevented
Only the protective relaying maloperation in electric system is made, and avoids unnecessary loss.
Utility model content
The application provides a kind of outgoing line device of power transformer balance winding, and the present apparatus can be in transformer manufacturing manufacturer
Just the D.C. resistance of winding is measured, and can also be tested at the scene, and does not have to worry that outside occurs for balance winding
To damage caused by transformer when short-circuit.The circulating current in current transformer measurement closing triangle can also be added simultaneously
It using the form for only using the extraction of two casings, reduces costs, while can avoid external short circuit and being damaged caused by voltage device,
Enhance the anti-short circuit capability of transformer.
A kind of outgoing line device of power transformer balance winding, including transformer A phase extraction tube, transformer B phase are drawn
Casing, transformer box cover, transformer A phase coil, transformer B phase coil and transformer C phase coil.
The transformer A phase extraction tube and the transformer B phase extraction tube are respectively on the top of the transformer box cover
Portion side, the transformer A phase coil, the transformer B phase coil and the transformer C phase coil are separately positioned on the change
The bottom of depressor case lid.
Preferably, the transformer A phase coil includes that its mutually starting at one end is arranged ap and its other end to be arranged in
Mutually last head xp.
The transformer B phase coil includes that its mutually starting at one end is arranged bp and to be arranged in the phase end head of its other end
yp。
The transformer C phase coil includes that mutually starting for one end is arranged in cp and to be arranged in the phase end head of its other end
zp。
Preferably, the phase end head xp of the transformer A phase coil and the transformer C phase coil cp that mutually starts are connect.
Mutually end head zp and the transformer B phase coil bp that mutually starts are connect for the transformer C phase coil.
The transformer A phase coil mutually start ap with the transformer B phase coil mutually end head yp is drawn respectively.
Preferably, the ap that mutually starts of the transformer A phase coil leads to the top of the transformer box cover, with the change
Depressor A phase extraction tube is connected.
Preferably, the phase end head yp of the transformer B phase coil leads to the top of the transformer box cover, with the change
Depressor B phase extraction tube is connected.
As can be seen from the above technical solutions, a kind of the application power transformer balance winding to be protected is traditional thread binding out
It sets, which is characterized in that including transformer A phase extraction tube, transformer B phase extraction tube, transformer box cover, transformer A phase line
Circle, transformer B phase coil and transformer C phase coil；The transformer A phase extraction tube and the transformer B phase extraction tube
Respectively in the top side of the transformer box cover, the transformer phase coil, the transformer phase coil and the transformer
Phase coil is separately positioned on the bottom of the transformer box cover.It balances winding and connects into open-delta in inside transformer, it will
Its both ends being open is drawn by two casings, the two terminals are shorted by when use with copper bar, passes through grounding copper bar or cable
It is directly accessed grounded screen.This outgoing line device not only can easily measure the direct current of winding in transformer manufacturing factory
Resistance, and can also be tested at the scene, and do not have to worry when external short circuit occurs for balance winding to damage caused by transformer
Wound.The circulating current in current transformer measurement closing triangle can also be added simultaneously, and two sets are only used using this structure
Pipe is drawn, and is reduced costs, while be can avoid external short circuit and being damaged caused by transformer, and the resistance to shorting energy of transformer is enhanced
Power.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the outgoing line device structural schematic diagram that a kind of power transformer provided by the present application balances winding.
It illustrates: 1- transformer A phase extraction tube, 2- transformer B phase extraction tube, 3- transformer box cover, 4- transformation
Device A phase coil, 5- transformer B phase coil, 6- transformer C phase coil.
Specific embodiment
The basic principle of transformer is electromagnetism perception, and the substantially former of its work is now illustrated by taking single-phase two-winding transformer as an example
Reason, when first side winding adds voltage A, the electric current flowed through is B, just generates alternating flux C in the core, these magnetic fluxs are known as
Main flux, under the action of it, it is E1, E2, induced potential e=4.44fnCm that two sides winding, which is respectively induced potential,.
Subharmonic channel can be improved in balance winding in transformer, improves perceptual EMF waveform, while can also mention
The ability of high transformer unbalanced load with burning voltage neutral point, while can improve the zero sequence impedance of transformer, balance around
The mode of connection of group is also different therewith in the effect of Transformer.The effect of balance winding is substantially that magnetic potential balance is made
With transformer is exactly the energy transmission for realizing first and second side by magnetic potential balance effect.
The application proposes a kind of outgoing line device of power transformer balance winding, including transformer A phase extraction tube thus
1, transformer B phase extraction tube 2, transformer box cover 3, transformer A phase coil 4, transformer B phase coil 5 and transformer C phase coil
6。
The transformer A phase extraction tube 1 and the transformer B phase extraction tube 2 are respectively in the transformer box cover 3
Top side, the transformer A phase coil 4, the transformer B phase coil 5 and the transformer C phase coil 6 are separately positioned on
The bottom of the transformer box cover 3.
Preferably, the transformer A phase coil 4 includes that its mutually starting at one end is arranged ap and its other end to be arranged in
Mutually last head xp.
Preferably, the transformer B phase coil 5 includes that its mutually starting at one end is arranged bp and its other end to be arranged in
Mutually last head yp.
Preferably, the transformer C phase coil 6 includes that mutually starting for one end is arranged in cp and its other end to be arranged in
Mutually last head zp.
Preferably, the phase end head xp of the transformer A phase coil 4 and 6 phase of transformer C the phase coil cp that starts are connect.
Preferably, the 6 phase end head zp of transformer C phase coil and 5 phase of transformer B the phase coil bp that starts are connect.
Preferably, 4 phase of the transformer A phase coil ap and 5 phase end head yp of the transformer B phase coil that starts draws respectively
Out.
Preferably, the ap that mutually starts of the transformer A phase coil 4 leads to the top of the transformer box cover 3, and described
Transformer A phase extraction tube 1 is connected, and in general assembly and casing connection, the two terminals are shorted by when use with copper bar, passes through
Grounding copper bar or cable are directly accessed grounded screen.
Preferably, the phase end head yp of the transformer B phase coil 5 leads to the top of the transformer box cover 3, and described
Transformer B phase extraction tube 2 is connected, and in general assembly and casing connection, the two terminals are shorted by when use with copper bar, passes through
Grounding copper bar or cable are directly accessed grounded screen.
Referring to Fig. 1, for a kind of outgoing line device structural schematic diagram of power transformer balance winding provided by the present application, balance
Winding connects into open-delta in inside transformer, and draws at the both ends of its opening, when use first with copper bar by this two
A terminal is shorted, and the sectional area of copper bar is chosen by the sectional area not less than sleeved conducting rod, no matter because transformer is just
Under normal operating condition, still run other windings and break down phenomenon, caused by zero-sequence component electric current only in the triangles
Dredging, balance winding to the size of earth-current are determined over the ground and to the capacitor of other windings by balance winding, in order to avoid
The influence of electric potential floating, open delta will be directly accessed grounded screen by grounding copper bar or cable after outside is shorted, for it
The selection of sectional area only considers that its mechanical strength is sufficient.
As can be seen from the above technical solutions, a kind of the application power transformer balance winding to be protected is traditional thread binding out
It sets, which is characterized in that including transformer A phase extraction tube 1, transformer B phase extraction tube 2, transformer box cover 3, transformer A phase
Coil 4, transformer B phase coil 5 and transformer C phase coil 6；The transformer A phase extraction tube 1 and the transformer B coupling
Casing 2 is respectively in the top side of the transformer box cover 3, the transformer A phase coil 4, the transformer B phase coil 5 out
The bottom of the transformer box cover 3 is separately positioned on the transformer C phase coil 6.Winding is balanced to connect in inside transformer
At open-delta, the both ends that are open are drawn by two casings, the two terminals are shorted by when use with copper bar, are passed through
Grounding copper bar or cable are directly accessed grounded screen.This outgoing line device not only can easily be measured in transformer manufacturing factory
The D.C. resistance of winding, and can also be tested at the scene, and do not have to worry when external short circuit occurs for balance winding to transformation
Damage caused by device.The circulating current in current transformer measurement closing triangle can also be added simultaneously, using this structure
It only uses two casings to draw, reduce costs, while can avoid external short circuit and being damaged caused by transformer, enhance transformer
Anti-short circuit capability.
It is practical new to will readily occur to this after considering specification and practicing utility model disclosed herein by field technical staff
Other embodiments of type.This application is intended to cover any variations, uses, or adaptations of the utility model, these changes
Type, purposes or adaptive change follow the general principle of the utility model and including the undocumented this technologies of the utility model
Common knowledge or conventional techniques in field.The description and examples are only to be considered as illustrative, the utility model it is true
Positive scope and spirit are indicated by the following claims.
It should be understood that the utility model is not limited to the accurate knot for being described above and being shown in the accompanying drawings
Structure, and various modifications and changes may be made without departing from the scope thereof.The scope of the utility model is only wanted by appended right
It asks to limit.
Claims (5)
1. a kind of outgoing line device of power transformer balance winding, which is characterized in that including transformer A phase extraction tube (1), become
Depressor B phase extraction tube (2), transformer box cover (3), transformer A phase coil (4), transformer B phase coil (5) and transformer C phase
Coil (6)；
The transformer A phase extraction tube (1) and the transformer B phase extraction tube (2) are respectively in the transformer box cover (3)
Top side, the transformer A phase coil (4), the transformer B phase coil (5) and the transformer C phase coil (6) point
It She Zhi not be in the bottom of the transformer box cover (3).
2. a kind of outgoing line device of power transformer balance winding according to claim 1, which is characterized in that the transformation
Device A phase coil (4) includes that its mutually starting at one end is arranged ap and to be arranged in the phase end head xp of its other end；
The transformer B phase coil (5) includes that its mutually starting at one end is arranged bp and to be arranged in the phase end head yp of its other end；
The transformer C phase coil (6) includes that mutually starting for one end is arranged in cp and to be arranged in the phase end head zp of its other end.
3. a kind of outgoing line device of power transformer balance winding according to claim 2, which is characterized in that the transformation
The phase end head xp of device A phase coil (4) and the transformer C phase coil (6) cp that mutually starts are connect；
Mutually end head zp and the transformer B phase coil (5) bp that mutually starts are connect for the transformer C phase coil (6)；
The transformer A phase coil (4) mutually start ap with the transformer B phase coil (5) mutually end head yp is drawn respectively.
4. a kind of outgoing line device of power transformer balance winding according to claim 2, which is characterized in that the transformation
The ap that mutually starts of device A phase coil (4) leads to the top of the transformer box cover (3), with the transformer A phase extraction tube
(1) it is connected.
5. a kind of outgoing line device of power transformer balance winding according to claim 2, which is characterized in that the transformation
The phase end head yp of device B phase coil (5) leads to the top of the transformer box cover (3), with the transformer B phase extraction tube
(2) it is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820917213.4U CN208225684U (en) | 2018-06-13 | 2018-06-13 | A kind of outgoing line device of power transformer balance winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820917213.4U CN208225684U (en) | 2018-06-13 | 2018-06-13 | A kind of outgoing line device of power transformer balance winding |
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| Publication Number | Publication Date |
|---|---|
| CN208225684U true CN208225684U (en) | 2018-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820917213.4U Active CN208225684U (en) | 2018-06-13 | 2018-06-13 | A kind of outgoing line device of power transformer balance winding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899178A (en) * | 2018-06-13 | 2018-11-27 | 卧龙电气银川变压器有限公司 | A kind of outgoing line device of power transformer balance winding |
| CN111337750A (en) * | 2020-02-11 | 2020-06-26 | 深圳供电局有限公司 | Method and device for synchronously testing direct resistance of three-phase winding of cable outgoing type transformer |
-
2018
- 2018-06-13 CN CN201820917213.4U patent/CN208225684U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108899178A (en) * | 2018-06-13 | 2018-11-27 | 卧龙电气银川变压器有限公司 | A kind of outgoing line device of power transformer balance winding |
| CN111337750A (en) * | 2020-02-11 | 2020-06-26 | 深圳供电局有限公司 | Method and device for synchronously testing direct resistance of three-phase winding of cable outgoing type transformer |
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