CN220474453U - Variable voltage transformer - Google Patents
Variable voltage transformer Download PDFInfo
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- CN220474453U CN220474453U CN202321823435.7U CN202321823435U CN220474453U CN 220474453 U CN220474453 U CN 220474453U CN 202321823435 U CN202321823435 U CN 202321823435U CN 220474453 U CN220474453 U CN 220474453U
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Abstract
A variable voltage transformer relates to the technical field of transformers. The variable voltage transformer comprises a basic section and a voltage regulating section. The basic section comprises a first basic section, a second basic section and a third basic section, and the first basic section, the second basic section and the third basic section can be connected in series or in parallel. The voltage regulating section is connected with the basic section and comprises a plurality of connectors, and the connectors can be connected or disconnected through a voltage regulating switch. The variable voltage transformer can realize the voltage of various variable power grids in a mode of adding the voltage regulating sections for supplementing or removing turns through a plurality of basic sections connected in series and parallel, has wide voltage coverage range, and can effectively control the cost of the transformer.
Description
Technical Field
The utility model relates to the technical field of transformers, in particular to a variable voltage transformer.
Background
In the power system, according to different requirements of variable network voltages in various countries, in order to ensure that the output variable voltage meets the rated value of the power network, the transformer windings are required to be connected in series and parallel to meet the requirements of the variable network. For example: the transformer of the variable voltage combination of 20-10/0.4kV is respectively provided with 3 tapping points, and the 20kV level tapping voltages are 21kV, 20kV and 19kV respectively; 10 The voltage of the kV-level switching is 10.5 kV, 10 kV and 9.5 kV respectively.
The inventor researches and discovers that the existing connection mode is that a basic section and a voltage regulating section are connected in series to form a combination, and then a plurality of combinations are connected in series and parallel, so that the connection mode can only realize 20-10 kV voltage conversion, has larger limitation, and is obviously insufficient for dealing with various international variable network voltages only by using a simple series-parallel conversion mode.
Disclosure of Invention
The utility model aims to provide a variable voltage transformer which can realize conversion of a larger range of voltage so as to meet the requirement of variable voltage of a power grid.
Embodiments of the utility model are implemented as follows:
the present utility model provides a variable voltage transformer comprising:
the basic section comprises a first basic section, a second basic section and a third basic section, and the first basic section, the second basic section and the third basic section can be connected in series or in parallel;
the voltage regulating section is connected with the basic section and comprises a plurality of connectors, and any two of the connectors can be connected or disconnected through a voltage regulating switch.
In an alternative embodiment, the first basic section is provided with a joint a and a joint B on both sides, the second basic section is provided with a joint C and a joint D on both sides, and the third basic section is provided with a joint E and a joint D on both sidesF, the voltage regulating section comprises a first voltage regulating section and a second voltage regulating section, the first voltage regulating section comprises a GH section, a HI section and an IJ section which are divided by a joint G, a joint H, a joint I and a joint J, the second voltage regulating section comprises a KL section, a LM section and an MX section which are divided by a joint K, a joint L, a joint M and a joint X, the joint A is a coil power line, the joint X is a coil tail line, the joint F is connected with the joint G, and the number of turns of the basic section is N 1 The number of turns of the GH segment is N 2 The HI section turns number is N 3 The turns of the IJ section is N 4 The number of turns of the KL segment is N 5 The number of turns of the LM section is N 6 The number of turns of the MX section is N 7 。
In an alternative embodiment, the joint B is connected to the joint C, and the joint D is connected to the joint F, wherein the first base section, the second base section, and the third base section are connected in series.
In an alternative embodiment, when the connector J and the connector L are connected, the variable voltage transformer is rated and the output voltage is:
V 1 =(N 1 ×3+N 2 +N 3 +N 4 +N 6 +N 7 )× Vt，
vt is the transformer turn potential.
In an alternative embodiment, the connector J is connected to the connector K, the variable voltage transformer is at maximum and the output voltage is:
V 2 =(N 1 ×3+N 2 +N 3 +N 4 + N 5 +N 6 +N 7 )× Vt，
vt is the transformer turn potential.
In an alternative embodiment, the connector I and the connector L are connected, the variable voltage transformer is at a minimum gear and the output voltage is:
V 3 =(N 1 ×3+N 2 +N 3 +N 6 +N 7 )× Vt，
vt is the transformer turn potential.
In an alternative embodiment, the joint a, the joint C and the joint E are connected in sequence, and the joint B, the joint D and the joint F are connected in sequence, in which case the first basic segment, the second basic segment and the third basic segment are connected in parallel.
In an alternative embodiment, the connector H is connected to the connector M, the variable voltage transformer is rated and the output voltage is:
V 4 =(N 1 +N 2 + N 7 )× Vt，
vt is the transformer turn potential.
In an alternative embodiment, the connection G and the connection M are connected, the variable voltage transformer is a second gear and the output voltage is:
V 5 =(N 1 + N 7 )× Vt，
vt is the transformer turn potential.
In an alternative embodiment, the connection G and the connection X are connected, the variable voltage transformer is in third gear and the output voltage is:
V 6 =N 1 × Vt，
vt is the transformer turn potential.
The embodiment of the utility model has the beneficial effects that:
the utility model can realize the voltage of various variable power grids in a mode of connecting a plurality of basic sections in series and connecting with each other and adding the voltage regulating section for supplementing or removing the turns, has wide voltage coverage range and can effectively control the cost of the transformer.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a variable voltage transformer according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the connection of basic segments in series according to an embodiment of the present utility model;
fig. 3 is a schematic diagram of connection of basic segments in parallel according to an embodiment of the present utility model.
Icon: 100-variable voltage transformers; 10-basic section; 11-a first basic segment; 12-a second basic segment; 13-a third basic segment; 20-a pressure regulating section; 21-a first pressure regulating section; 22-a second pressure regulating section.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, fig. 1 is a schematic diagram of a primary winding of a variable voltage transformer 100 according to the present embodiment. The present embodiment provides a variable voltage transformer 100 including a base section 10 and a voltage regulating section 20. The basic segment 10 comprises a first basic segment 11, a second basic segment 12 and a third basic segment 13, which can be connected in series or in parallel between the first basic segment 11, the second basic segment 12 and the third basic segment 13. The voltage regulating section 20 is connected with the base section 10, and the voltage regulating section 20 includes a plurality of joints, which can be turned on or off by a voltage regulating switch. Specifically, any two joints of the voltage regulating section can be connected, and partial short circuit of the voltage regulating section can be realized so as to adjust the number of turns.
Specifically, in the present embodiment, the first base section 11 is provided with the joint a and the joint B on both sides, the second base section 12 is provided with the joint C and the joint D on both sides, the third base section 13 is provided with the joint E and the joint F on both sides, the pressure regulating section 20 includes the first pressure regulating section 21 and the second pressure regulating section 22, and the first pressure regulating section 21 includes the joint G, the joint H, the jointThe GH section, HI section and IJ section divided by the joint I and the joint J, the second voltage regulating section 22 comprises a KL section, an LM section and an MX section divided by the joint K, the joint L, the joint M and the joint X, the joint A is a coil power wire, the joint X is a coil tail wire, the joint F is connected with the joint G, and the number of turns of the basic section 10 is N 1 GH segment turns N 2 The HI section turns to N 3 The number of turns of IJ segment is N 4 KL segment turns of N 5 The number of turns of LM segment is N 6 The number of turns of MX section is N 7 . Wherein N is 1 =489 turns, N 2 =13 turns, N 3 =14 turns, N 4 =39 turns, N 5 =39 turns, N 6 =14 turns, N 7 =12 turns.
In this embodiment, the transformer secondary side voltage is 0.4kV, the secondary side turns are 18 turns, the vector group is Dyn11 (Dyn 1), and the transformer turn potential vt=0.4/30.5/18≡ 0.01283 kv=12.83V/turn.
Referring to fig. 2, joint B is connected to joint C, and joint D is connected to joint F. At this time, the first basic section 11, the second basic section 12 and the third basic section 13 are connected in series, and three gear positions of different connection modes of the voltage regulating section 20 are described below:
when the joint J is connected with the joint L, the rated gear of 20kV voltage is adopted, and the output voltage is as follows:
V 1 = (N 1 ×3+N 2 +N 3 +N 4 +N 6 +N 7 )× Vt
= (489×3+13+14+39+14+12) turns×vt=1559 turns×vt V/turns
=1559 turns×12.83V/turn
≈20000V
When the joint J is connected with the joint K, the maximum voltage of 20kV is obtained, and the output voltage is as follows:
V 2 =(N 1 ×3+N 2 +N 3 +N 4 + N 5 +N 6 +N 7 )× Vt
= (489×3+13+14+39+39+14+12) turns×vt=1598 turns×vt V/turns
=1598 turns×12.83V/turn
≈20500V
When the joint I and the joint L are connected, the minimum gear of 20kV voltage is adopted, and the output voltage is as follows:
Ve=(N 1 ×3+N 2 +N 3 +N 6 +N 7 )× Vt
= (489×3+13+14+14+12) turns×vt=1520 turns×vt V/turn
=1520 turns×12.83V/turn
≈19500V
Referring to fig. 3, the joint a, the joint C and the joint E are sequentially connected, the joint B, the joint D and the joint F are sequentially connected, at this time, the first basic section 11, the second basic section 12 and the third basic section 13 are connected in parallel, and three kinds of gears of different connection modes of the voltage regulating section 20 are described below:
when the joint H and the joint M are connected, the rated gear with the voltage of 6.6kV is adopted, and the output voltage is as follows:
V 4 =(N 1 +N 2 + N 7 )× Vt
= (489+13+12) turns×vt=514 turns×vt V/turn
=514 turns×12.83V/turn
≈6600V
When the joint G and the joint M are connected, the second gear with the voltage of 6.6kV is adopted, and the output voltage is as follows:
V 5 =(N 1 + N 7 )× Vt
= (489+12) turns×vt=514 turns×vt V/turn
=501 turns×12.83V/turn
≈6435V
When the joint G is connected with the joint X, the third gear with the voltage of 6.6kV is adopted, and the output voltage is as follows:
V 6 =N 1 × Vt
=489 turns×vt
=489 turns×12.83V/turn
≈6270V
It should be noted that, the above is only a part of the gear positions of the variable voltage transformer 100 provided by the present utility model, and the output voltage can be changed by adjusting the serial-parallel connection mode of the basic section 10 and the wiring mode of the voltage regulating section 20 according to specific needs when in use.
The working principle and process of the variable voltage transformer 100 provided by the utility model are as follows:
when the system voltage is 20kV, the connection B and the connection C are connected through the switch, and the connection D and the connection F are connected, that is, the first basic section 11, the second basic section 12 and the third basic section 13 are connected in series. Meanwhile, the wiring mode of the voltage regulating section 20 is adjusted, and the number of turns of the voltage regulating section 20 is changed to obtain different gears when 20kV is obtained.
When the system voltage is 6.6kV, the joint A, the joint C and the joint E are sequentially connected through the switch, the joint B, the joint D and the joint F are sequentially connected, namely the first basic section 11, the second basic section 12 and the third basic section 13 are connected in parallel, and meanwhile, the wiring mode of the voltage regulating section 20 is adjusted to change the number of turns of the voltage regulating section 20 so as to obtain different gears of the 6.6kV voltage
The variable voltage transformer 100 provided by the utility model has the beneficial effects that:
the utility model can realize the voltage of various variable power grids in a mode of connecting a plurality of basic sections 10 in series and parallel and externally adding the voltage regulating section 20 for supplementing or removing turns, has wide voltage coverage range and can effectively control the cost of the transformer.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A variable voltage transformer, the variable voltage transformer comprising:
the basic section comprises a first basic section, a second basic section and a third basic section, and the first basic section, the second basic section and the third basic section can be connected in series or in parallel;
the voltage regulating section is connected with the basic section and comprises a plurality of connectors, and any two of the connectors can be connected or disconnected through a voltage regulating switch.
2. The variable voltage transformer of claim 1, wherein the first base section is provided with a joint a and a joint B on both sides, the second base section is provided with a joint C and a joint D on both sides, the third base section is provided with a joint E and a joint F on both sides, the voltage regulating section comprises a first voltage regulating section and a second voltage regulating section, the first voltage regulating section comprises a GH section, a HI section and a IJ section divided by a joint G, a joint H, a joint I and a joint J, the second voltage regulating section comprises a KL section, a LM section and a MX section divided by a joint K, a joint L, a joint M and a joint X, the joint a is a coil power line, the joint X is a coil tail, the joint F and the joint G are connected, the base section is N turns 1 The number of turns of the GH segment is N 2 The HI section turns number is N 3 The turns of the IJ section is N 4 The number of turns of the KL segment is N 5 The number of turns of the LM section is N 6 The number of turns of the MX section is N 7 。
3. A variable voltage transformer according to claim 2, wherein the joint B is connected to the joint C, and the joint D is connected to the joint F, while the first, second and third basic segments are connected in series.
4. A variable voltage transformer according to claim 3, wherein when the junction J and the junction L are connected, the variable voltage transformer is rated and the output voltage is:
V 1 =(N 1 ×3+N 2 +N 3 +N 4 +N 6 +N 7 )× Vt，
vt is the transformer turn potential.
5. A variable voltage transformer according to claim 3, wherein the junction J and the junction K are connected, the variable voltage transformer being at maximum and the output voltage being:
V 2 =(N 1 ×3+N 2 +N 3 +N 4 + N 5 +N 6 +N 7 )× Vt，
vt is the transformer turn potential.
6. A variable voltage transformer according to claim 3, wherein the connection I and the connection L are connected, the variable voltage transformer being at a minimum gear and the output voltage being:
V 3 =(N 1 ×3+N 2 +N 3 +N 6 +N 7 )× Vt，
vt is the transformer turn potential.
7. A variable voltage transformer according to claim 2, wherein the joint a, the joint C and the joint E are connected in sequence, and the joint B, the joint D and the joint F are connected in sequence, while the first basic section, the second basic section and the third basic section are connected in parallel.
8. The variable voltage transformer of claim 7 wherein the junction H and the junction M are connected, the variable voltage transformer being rated and the output voltage being:
V 4 =(N 1 +N 2 + N 7 )× Vt，
vt is the transformer turn potential.
9. The variable voltage transformer of claim 7 wherein the connection G and the connection M are connected, the variable voltage transformer being a second gear and the output voltage being:
V 5 =(N 1 + N 7 )× Vt，
vt is the transformer turn potential.
10. The variable voltage transformer of claim 7 wherein the connection G and the connection X are connected, the variable voltage transformer being third gear and the output voltage being:
V 6 =N 1 × Vt，
vt is the transformer turn potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321823435.7U CN220474453U (en) | 2023-07-11 | 2023-07-11 | Variable voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321823435.7U CN220474453U (en) | 2023-07-11 | 2023-07-11 | Variable voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220474453U true CN220474453U (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321823435.7U Active CN220474453U (en) | 2023-07-11 | 2023-07-11 | Variable voltage transformer |
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| Country | Link |
|---|---|
| CN (1) | CN220474453U (en) |
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- 2023-07-11 CN CN202321823435.7U patent/CN220474453U/en active Active
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