CN209266165U - A kind of grid-connected photovoltaic power generation dry type transformer winding structure - Google Patents
A kind of grid-connected photovoltaic power generation dry type transformer winding structure Download PDFInfo
- Publication number
- CN209266165U CN209266165U CN201822228530.8U CN201822228530U CN209266165U CN 209266165 U CN209266165 U CN 209266165U CN 201822228530 U CN201822228530 U CN 201822228530U CN 209266165 U CN209266165 U CN 209266165U
- Authority
- CN
- China
- Prior art keywords
- group
- winding
- low pressure
- pressure winding
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Coils Of Transformers For General Uses (AREA)
Abstract
A kind of grid-connected photovoltaic power generation dry type transformer winding structure, iron core are located at innermost layer, and low pressure winding is in the outside of iron core, and high-voltage winding is in the outside of low pressure winding；Axial two width of low pressure winding two are to being split into four independent windings；First group of low pressure winding and second group of low pressure winding are located at low pressure winding top, and third group low pressure winding and the 4th group of low pressure winding are located at low pressure winding lower part, and first group of high-voltage winding is located at high-voltage winding top, and second group of high-voltage winding is located at high-voltage winding lower part.Second group of low pressure winding and the 4th group of low pressure winding are located at the outside of first group of low pressure winding and third group low pressure winding.Low-pressure side short circuit current can be effectively inhibited, can be reduced investment outlay on selecting equipment.When high-voltage winding and low pressure winding are run simultaneously, which passes through that impedance is identical with the short-circuit impedance value of common transformer, and when low-pressure side short at one end, larger due to dividing impedance, short circuit current is smaller.
Description
Technical field
It is especially that a kind of grid-connected photovoltaic power generation is become with dry type the utility model relates to transformer winding structure technical field
Depressor winding construction.
Background technique
Currently, in photovoltaic power generation and inversion transformation technique, since inverter output voltage is low, it is necessary to will be inverse by step-up transformer
Become device output voltage to be promoted to the voltage class that can satisfy grid-connected requirement.Due to being limited by electronic component power, photovoltaic
Photovoltaic inversion device applied by grid-connected power station is usually no more than 500kW.So boosting transformer for photovoltaic power generation is generally more
Using low pressure winding axial direction quadripartion structure, this structure can satisfy a step-up transformer can connect four inversions simultaneously
Device.The every phase coil of the step-up transformer of such structure divides upper and lower part, and there are high-voltage coil and low-voltage coil, i.e., every 8 lines of phase in every part again
Circle, every transformer totally 24 coils.It takes up a large area, the disadvantages such as manufacturing cost is high, and production efficiency is low.
However, the analysis found that, existing grid-connected photovoltaic power generation is had the following disadvantages with dry type transformer winding structure；
First, taking up a large area, second, manufacturing cost is high；Third, production efficiency is low.
Utility model content
Therefore, in order to solve above-mentioned deficiency, the utility model provides a kind of grid-connected photovoltaic power generation dry-type transformer herein
Winding construction.
A kind of grid-connected photovoltaic power generation dry type transformer winding structure, including first group of high-voltage winding, 5, second groups of high voltage windings
Group 6,7, first groups of iron core, 17, second groups of low pressure winding low pressure winding 18, third group low pressure winding 19 and the 4th group of low pressure winding
4；First group of low pressure winding, 17, second groups of low pressure windings 18, third group low pressure winding 19 and the 4th group of low pressure winding 4 are individually defeated
Enter, is exported after first group of high-voltage winding 5 and second group of 6 parallel connection of high-voltage winding；Iron core 7 is located at innermost layer, and low pressure winding is in iron core 7
Outside, high-voltage winding is in the outside of low pressure winding；Axial two width of low pressure winding two are to being split into four independent windings；First group
Low pressure winding 17 and second group of low pressure winding 18 are located at low pressure winding top, third group low pressure winding 19 and the 4th group of low pressure winding
4 are located at low pressure winding lower part, and first group of high-voltage winding 5 is located at high-voltage winding top, and second group of high-voltage winding 6 is located at high-voltage winding
Lower part.Second group of low pressure winding 18 and the 4th group of low pressure winding 4 are located at first group of low pressure winding 17 and third group low pressure winding 19
Outside.
Optimization, 19, the 4th groups of first group of low pressure winding, 17, second groups of low pressure windings 18, third group low pressure winding low pressure
The primary cable specification of winding 4 is identical with the number of turns.
Optimization, 19, the 4th groups of first group of low pressure winding, 17, second groups of low pressure windings 18, third group low pressure winding low pressure
The transformer capacity of winding 4 is identical.
Optimization, the high-voltage conducting wires specification and the number of turns and structure of first group of high-voltage winding 5 and second group of high-voltage winding 6 are complete
It is identical.
Optimization, first group of high-voltage winding 5 is identical with the transformer pool-size of second group of high-voltage winding 6.
The utility model patent has the advantage that
1. low-pressure side short circuit current can be effectively inhibited, can reduce investment outlay on selecting equipment.High-voltage winding and low pressure
When winding is run simultaneously, the structure transformer to pass through impedance identical with the short-circuit impedance value of common transformer, work as low pressure
When the short at one end of side, since division impedance is larger, short circuit current is smaller.
2. can be adjusted according to the needs first group of low pressure winding 1 and second group of low pressure winding 2 or third group low pressure winding 3
With the 4th group of position of the low pressure winding 4 relative to first group of high-voltage winding 5 and second group of high-voltage winding 6, increase first group of low pressure
Winding 1 and second group of low pressure winding 2 or the division impedance between third group low pressure winding 3 and the 4th group of low pressure winding 4, reduce
Mutual inductance.
3. designing and manufacturing technology difficulty to substantially reduce, the production efficiency of product is improved.
4. effectively reducing the height of iron core 7, to reduce the whole height of transformer, improves transformer and stablize
Property.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment 1-2；
Fig. 2 is the structural schematic diagram of the utility model embodiment 1-2；
Serial number as shown in the figure: insulating layer 3, the 4th group of 4, first groups of low pressure winding, 5, second groups of high-voltage winding high-voltage winding 6,
Iron core 7, iron core 8, the 5th group of low pressure winding 9, the 6th group of low pressure winding 10, the 7th group of low pressure winding 11, the 8th group of low pressure winding
12, third group high-voltage winding 13, the 4th group of high-voltage winding 14, the 5th group of high-voltage winding 15, the 6th group 16, first groups of high-voltage winding
17, second groups of low pressure windings 18 of low pressure winding, third group low pressure winding 19.
Specific embodiment
The utility model is described in detail below in conjunction with attached drawing 1- Fig. 2, to the skill in the utility model embodiment
Art scheme is clearly and completely described, it is clear that and the described embodiments are only a part of the embodiments of the utility model, and
The embodiment being not all of.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creativeness
Every other embodiment obtained, fall within the protection scope of the utility model under the premise of labour；In addition, term " first ",
" second ", " third " " upper and lower, left and right " etc. are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Meanwhile in the description of the present invention, unless otherwise clearly defined and limited, term " connected ", " connection " should do broad sense
Understand, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be mechanical connection, it can also
To be to be electrically connected；It can be directly connected, it can also be indirectly connected through an intermediary.For the ordinary skill people of this field
For member, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Embodiment 1
Grid-connected photovoltaic power generation dry type transformer winding structure, shown in Fig. 1-2, including first group 5, second groups of high-voltage winding
High-voltage winding 6,7, first groups of iron core, 17, second groups of low pressure winding low pressure winding 18, third group low pressure winding 19 and the 4th group are low
Press winding 4；First group of low pressure winding, 17, second groups of low pressure windings 18, third group low pressure winding 19 and the 4th group of low pressure winding 4 are
It individually enters, is exported after first group of high-voltage winding 5 and second group of 6 parallel connection of high-voltage winding.
Iron core 7 is located at innermost layer, and low pressure winding is in the outside of iron core 7, and high-voltage winding is in the outside of low pressure winding；Low pressure around
Axial two width of group two are to being split into four independent windings；First group of low pressure winding 17 and second group of low pressure winding 18 be located at low pressure around
Group top, third group low pressure winding 19 and the 4th group of low pressure winding 4 are located at low pressure winding lower part, and first group of high-voltage winding 5 is located at
High-voltage winding top, second group of high-voltage winding 6 are located at high-voltage winding lower part.Second group of low pressure winding 18 and the 4th group of low pressure winding
4 are located at the outside of first group of low pressure winding 17 and third group low pressure winding 19.
First group of low pressure winding, 17, second groups of low pressure windings 18, third group low pressure winding 19, the 4th groups of low pressure windings 4
Primary cable specification is identical with the number of turns.
First group of low pressure winding, 17, second groups of low pressure windings 18, third group low pressure winding 19, the 4th groups of low pressure windings 4
Transformer capacity is identical.
First group of high-voltage winding 5 and the high-voltage conducting wires specification of second group of high-voltage winding 6 are identical with the number of turns with structure.
First group of high-voltage winding 5 is identical with the transformer pool-size of second group of high-voltage winding 6.
Embodiment 2
Grid-connected photovoltaic power generation dry type transformer winding structure, mesolow are two axial two width to splitted construction, it is wrapped
Include first group of high-voltage winding, 5, second groups of high-voltage windings 6,7, first groups of iron core, 17, second groups of low pressure winding low pressure winding 18,
Three groups of low pressure windings 19 and the 4th group of low pressure winding 4.First group of low pressure winding, 17, second groups of low pressure windings 18, third group low pressure
Winding 19 and the 4th group of low pressure winding 4 are to individually enter, and are exported after first group of high-voltage winding 5 and second group of 6 parallel connection of high-voltage winding.
Grid-connected photovoltaic power generation dry type transformer winding structure in the present embodiment includes iron core 7, is sleeved on 7 outside of iron core
Be first group of low pressure winding 17 and third group low pressure winding 19, second group of low pressure winding 18 and the 4th group of low pressure winding 4 are
19 outside of one group of low pressure winding 17 and third group low pressure winding, first group of high-voltage winding 5 and second group of high-voltage winding 6 are at second group
The outside of low pressure winding 18 and the 4th group of low pressure winding 4, first group of low pressure winding 17 are low with 19, second groups of third group low pressure winding
Pressure winding 18 and the 4th group of low pressure winding 4 and first group of high-voltage winding 5 and second group of high-voltage winding 6 are axial direction double bundle row
Cloth, and first group of low pressure winding, 17, second groups of low pressure windings 18 and first group of high-voltage winding 5 are arranged in axial top, first
Group low pressure winding 17,19, second groups of low pressure windings 18 of third group low pressure winding, mutually insulated between the 4th group of low pressure winding 4, and
Electrically mutually indepedent, but there is magnetic connection.First group of high-voltage winding 5 and second group of high-voltage winding 6 are mutually juxtaposed output.Due to
Reactance height and third group low pressure between first group of low pressure winding, 17, second groups of low pressure windings 18 and first group of high-voltage winding 5
Reactance height between winding 19, the 4th group of low pressure winding 4 and second group of high-voltage winding 6 is equal, so high-voltage winding and low pressure
There is good ampere-turn equilibrium relationship between winding, reduce leakage field.
Grid-connected photovoltaic power generation dry type transformer winding structure has good craftsmanship and efficiency, effectively reduces iron core
7 height improves transformer overall stability, reduces the whole manufacture difficulty and cost of product.
Grid-connected photovoltaic power generation dry type transformer winding structure is due to using axial two width of low pressure two to splitted construction shape
Formula, when all low pressure winding parallel runnings, and when high-voltage winding also uses parallel way to run, then in high-voltage winding and
The impedance measured between low pressure winding is to pass through impedance.Therefore, when in four groups of low pressure windings one group of low pressure winding open circuit,
Other low pressure winding operations, under this method of operation, then 3/4ths can be generated between high-voltage winding and low pressure winding
Pass through impedance；When wherein two groups of low pressure windings are opened a way, other low pressure windings are run, under this method of operation, then in high pressure
It can be generated between winding and low pressure winding and partly pass through impedance；When wherein three groups of low pressure windings are opened a way, other low pressure windings are run,
Under this method of operation, then can generate a quarter between high-voltage winding and low pressure winding passes through impedance.Low pressure is two axis
To two width to the larger anti-short circuit capability for improving transformer of splitted construction form.
First group of low pressure winding 1 and second group of low pressure winding 18 are relative to first group of high-voltage winding 5, position in the axial direction
Nearly identical, i.e., the position relative to the magnetic flux leakage of first group of high-voltage winding 5 is identical, half relative to high-voltage winding
Pass through impedance be it is identical, in this way when transformer load is run, circulation will not be generated between two high-voltage windings in parallel.Together
Relative to second group of high-voltage winding 6, position in the axial direction is almost complete for sample third group low pressure winding 19 and the 4th group of low pressure winding 4
Exactly the same, i.e., the position relative to the magnetic flux leakage of second group of high-voltage winding 6 is identical, partly passes through resistance relative to high-voltage winding
It is identical for resisting, and in this way when transformer load is run, will not generate circulation between two high-voltage windings in parallel.
First group of low pressure winding 17 is identical as the coil turn of second group of low pressure winding 18.Certainly, first group of low pressure winding
17 can also be different with the coil turn of second group of low pressure winding 18.
Third group low pressure winding 19 is identical as the 4th group of coil turn of low pressure winding 4.Certainly, third group low pressure winding 19
It can also be different with the coil turn of the 4th group of low pressure winding 4.
First group of high-voltage winding 5 is identical as the number of turns of the second high-voltage winding 6.Certainly, first group of high-voltage winding 5 and second group
The number of turns of high-voltage winding 6 can also be different.
Three-phase voltage increasing transformer of the grid-connected photovoltaic power generation with dry type transformer winding structure especially suitable for photovoltaic power generation
Electrical power trans mission/distribution system in.
The utility model patent has the advantage that
1. low-pressure side short circuit current can be effectively inhibited, can reduce investment outlay on selecting equipment.High-voltage winding and low pressure
When winding is run simultaneously, the structure transformer to pass through impedance identical with the short-circuit impedance value of common transformer, work as low pressure
When the short at one end of side, since division impedance is larger, short circuit current is smaller.
2. can be adjusted according to the needs first group of low pressure winding 17 and second group of low pressure winding 18 or third group low pressure around
Group 19 and the 4th group of position of the low pressure winding 4 relative to first group of high-voltage winding 5 and second group of high-voltage winding 6 increase first group
Low pressure winding 17 and second group of low pressure winding 18 or between third group low pressure winding 19 and the 4th group of low pressure winding 4 division resistance
It is anti-, reduce mutual inductance.
3. designing and manufacturing technology difficulty to substantially reduce, the production efficiency of product is improved.
4. effectively reducing the height of iron core 7, to reduce the whole height of transformer, improves transformer and stablize
Property.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (5)
1. a kind of grid-connected photovoltaic power generation dry type transformer winding structure, which is characterized in that including first group of high-voltage winding (5),
Second group of high-voltage winding (6), iron core (7), first group of low pressure winding (17), second group of low pressure winding (18), third group low pressure around
Group (19) and the 4th group of low pressure winding (4)；First group of low pressure winding (17), second group of low pressure winding (18), third group low pressure around
Group (19) and the 4th group of low pressure winding (4) are to individually enter, and first group of high-voltage winding (5) and second group of high-voltage winding (6) are in parallel
After export；
Iron core (7) is located at innermost layer, and low pressure winding is in the outside of iron core (7), and high-voltage winding is in the outside of low pressure winding；Low pressure around
Axial two width of group two are to being split into four independent windings；First group of low pressure winding (17) and second group of low pressure winding (18) are located at low
Winding top is pressed, third group low pressure winding (19) and the 4th group of low pressure winding (4) are located at low pressure winding lower part, first group of high voltage winding
Group (5) is located at high-voltage winding top, and second group of high-voltage winding (6) is located at high-voltage winding lower part；
Second group of low pressure winding (18) and the 4th group of low pressure winding (4) be located at first group of low pressure winding (17) and third group low pressure around
The outside of group (19).
2. grid-connected photovoltaic power generation dry type transformer winding structure according to claim 1, which is characterized in that first group low
Press winding (17), second group of low pressure winding (18), third group low pressure winding (19), the 4th group of low pressure winding (4) primary cable
Specification is identical with the number of turns.
3. grid-connected photovoltaic power generation dry type transformer winding structure according to claim 1, which is characterized in that first group low
The transformer of winding (17), second group of low pressure winding (18), third group low pressure winding (19), the 4th group of low pressure winding (4) is pressed to hold
It measures identical.
4. grid-connected photovoltaic power generation dry type transformer winding structure according to claim 1, which is characterized in that first group high
Press winding (5) and the high-voltage conducting wires specification of second group of high-voltage winding (6) identical with the number of turns with structure.
5. grid-connected photovoltaic power generation dry type transformer winding structure according to claim 1, which is characterized in that first group high
Press winding (5) identical with the transformer pool-size of second group of high-voltage winding (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822228530.8U CN209266165U (en) | 2018-12-28 | 2018-12-28 | A kind of grid-connected photovoltaic power generation dry type transformer winding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822228530.8U CN209266165U (en) | 2018-12-28 | 2018-12-28 | A kind of grid-connected photovoltaic power generation dry type transformer winding structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209266165U true CN209266165U (en) | 2019-08-16 |
Family
ID=67583724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822228530.8U Expired - Fee Related CN209266165U (en) | 2018-12-28 | 2018-12-28 | A kind of grid-connected photovoltaic power generation dry type transformer winding structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209266165U (en) |
-
2018
- 2018-12-28 CN CN201822228530.8U patent/CN209266165U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105719799B (en) | A kind of transformer with split winding | |
| CN1971778B (en) | Single-phase self-coupling on-load voltage-regulating transformer | |
| CN103337344B (en) | Double-split epoxy resin insulation dry type boosting transformer for wind power and photovoltaic power generation | |
| CN203232785U (en) | Dry-type transformer | |
| CN102035361A (en) | Voltage regulation device | |
| CN204117774U (en) | A kind of transformer with split winding | |
| CN206516457U (en) | A kind of photovoltaic inversion double division boosting dry-type transformers of conjugation-type | |
| CN209266165U (en) | A kind of grid-connected photovoltaic power generation dry type transformer winding structure | |
| CN205723093U (en) | A kind of 220kV SCOTT balance traction transformer winding construction | |
| CN101388280B (en) | Multi-stage dry voltage regulating transformer | |
| CN201219060Y (en) | Multi-tap dry-type voltage-regulating transformer | |
| CN102801240B (en) | Alternating current motor wave winding and transpositional connection method thereof | |
| CN206628348U (en) | A kind of foil cast winding of unilateral four terminals of axial split | |
| CN102420043B (en) | Single-phase high-impedance auto-transformer | |
| CN208806133U (en) | A kind of four circuit photovoltaic power generation dry-type transformers | |
| CN207572220U (en) | Quadripartion combined transformer | |
| CN108335867A (en) | A kind of photovoltaic inversion double division boosting dry-type transformers of conjugation-type | |
| CN207489617U (en) | A kind of dry-type transformer of tape insulation pad briquetting | |
| CN106205975A (en) | A kind of transformator balanced coil structure | |
| CN207587495U (en) | The transformer of hot pipe cooling dry type | |
| CN203026330U (en) | Four-split transformer | |
| CN207367763U (en) | Ocean platform changes input Multiple coil dry-type transformer with 6-10kV twin voltages | |
| CN201869105U (en) | Voltage regulator | |
| CN112185656A (en) | Self-coupling on-load tap changer | |
| CN201838436U (en) | Double-voltage oil-immersed transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190816 Termination date: 20191228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |