CN220121619U - Transformer and Hua type preassembled transformer substation - Google Patents

Abstract

The utility model relates to a transformer and a Chinese type preassembled transformer substation, wherein the transformer comprises an iron core and a coil wound outside the iron core; the coil is wound around the axial direction of the iron core, and the cross section of the iron core is elliptical along the direction intersecting with the axial direction of the iron core. The traditional transformer adopts a round coil structure, the cross section of the needed iron core also needs to be round, but when the transformer is formed in a lamination mode, the cross section can be close to the round shape only when the number of laminations is larger, so that great difficulty is brought to iron core manufacture, and the production cost is increased. In the transformer provided by the utility model, the cross section of the iron core is of an ellipse-like shape, the iron core is not required to be molded by a plurality of lamination sheets, the number of the lamination sheets required in the lamination process is less, the iron core is simpler to manufacture, and the cost is lower. Meanwhile, the similar oval iron core and coil structure has good short circuit resistance, and the product quality of the transformer is guaranteed.

Description

Transformer and Hua type preassembled transformer substation

Technical Field

The utility model relates to the technical field of new energy power generation, in particular to a transformer and a Hua type preassembled transformer substation.

Background

The box-type transformer substation, also called prefabricated substation or prefabricated substation, is a prefabricated indoor and outdoor compact type power distribution equipment of factory, which is integrated according to a certain wiring scheme, i.e. the functions of transformer voltage reduction, low-voltage power distribution and the like are organically combined together, and is installed in a steel structure box which is dampproof, rust-proof, dustproof, rat-proof, fireproof, antitheft, heat-insulating, totally-enclosed and movable, and is particularly suitable for urban network construction and transformation, and is a brand-new transformer substation which grows up after the civil engineering of the transformer substation. The box-type transformer substation is suitable for mines, factory enterprises, oil and gas fields, wind power stations and photovoltaic power stations, replaces original civil engineering power distribution houses and power distribution stations, and becomes a novel complete power transformation and distribution device.

The box-type transformer station can be classified into a combination transformer (beauty transformer), a high voltage/low voltage pre-installed transformer station (warrior transformer), and a high voltage/low voltage pre-installed transformer station (euro transformer) according to types. In the related art, the novel energy wind power generation and the photovoltaic power generation adopt the Hua type preassembled transformer substation for power transportation, but the transformer in the traditional Hua type preassembled transformer substation adopts a circular coil structure, so that the manufacturing cost is high.

Disclosure of Invention

Based on the above, it is necessary to provide a transformer and a pre-installed transformer substation for solving the problem that the manufacturing cost of the transformer in the conventional pre-installed transformer substation is high.

A transformer which is arranged in a Hua type preassembled transformer substation and comprises an iron core and a coil wound outside the iron core;

the coil is wound around the axial direction of the iron core, and the cross section of the iron core is elliptical along the direction intersecting with the axial direction of the iron core.

The traditional transformer adopts a round coil structure, the cross section of the needed iron core also needs to be round, but when the transformer is formed in a lamination mode, the cross section can be close to the round shape only when the number of laminations is larger, so that great difficulty is brought to iron core manufacture, and the production cost is increased. In the transformer provided by the utility model, the cross section of the iron core is of an ellipse-like shape, the iron core is not required to be molded by a plurality of lamination sheets, the number of the lamination sheets required in the lamination process is less, the iron core is simpler to manufacture, and the cost is lower. Meanwhile, the similar oval iron core and coil structure has good short circuit resistance, and the product quality of the transformer is guaranteed.

In one embodiment, the coil comprises a low voltage coil wound with aluminum foil.

In one embodiment, the coil comprises a high voltage coil wound with an aluminum alloy wire.

In one embodiment, the aluminum alloy wire is wrapped with heat-resistant paper.

In one embodiment, the coil comprises a low voltage coil and a high voltage coil, and the transformer further comprises a main air channel structure;

the low-voltage coil is sleeved outside the iron core, the high-voltage coil is sleeved outside the low-voltage coil, and the main air channel structure is sleeved between the low-voltage coil and the high-voltage coil;

the main channel structure comprises insulating paper, and the breakdown voltage of the insulating paper ranges from 70kv/mm to 78kv/mm.

In one embodiment, the insulating paper is resistant to temperatures of 120 ℃.

In one embodiment, the insulating paper is TUF-Flex dispensing paper.

A Hua style preassembled transformer station comprises the transformer.

In one embodiment, the transformer further comprises a low-voltage cabinet and a high-voltage cabinet, wherein the low-voltage cabinet and the transformer are arranged on the same side of the high-voltage cabinet.

In one embodiment, the high-voltage cabinet is a high-voltage five-in-one vacuum circuit breaker cabinet and comprises a vacuum circuit breaker, an isolating switch, a grounding switch, a current transformer and a lightning arrester.

Drawings

Fig. 1 is a schematic diagram of a transformer according to an embodiment of the utility model.

Fig. 2 is a schematic diagram of the structure of the iron core and the coil in the transformer shown in fig. 1.

Fig. 3 is a schematic structural diagram of a chinese prefabricated substation according to an embodiment of the present utility model.

Reference numerals illustrate: 200. a Hua style preassembled transformer station; 210. a high-voltage cabinet; 230. a low-voltage cabinet; 100. a transformer; 10. an iron core; 30. a coil; 32. a low voltage coil; 34. a high voltage coil; 50. a main air channel structure; 52. insulating paper; 54. and (5) supporting bars.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1-2, according to some embodiments of the present utility model, a transformer 100 is provided in a pre-installed transformer substation 200, and includes a core 10 and a coil 30 wound around the core 10. The coil 30 is wound around the core 10 in the axial direction, and the cross section of the core 10 is elliptical in the direction intersecting the core 10 in the axial direction.

It is understood that an ellipse-like shape refers to a shape that approximates an ellipse. The cross section of the iron core required by the traditional circular coil structure is required to be circular, but when the iron core is formed in a lamination mode, the cross section can be more similar to the circular shape as the number of laminations is increased, so that great difficulty is brought to iron core manufacture, and the production cost is increased. In the transformer 100 provided by the utility model, the cross section of the iron core 10 is in an elliptical shape, the iron core 10 is not required to be formed by a plurality of lamination sheets, the number of the lamination sheets required in the lamination process is small, and the iron core 10 is simpler to manufacture and has lower cost. Meanwhile, the structure of the elliptical iron core 10 and the coil 30 has better short circuit resistance.

According to some embodiments of the present utility model, the coil 30 includes a low-voltage coil 32, and the low-voltage coil 32 is wound by aluminum foil, so that the low-voltage coil has better economical performance under the condition of ensuring the electric power performance.

According to some embodiments of the present utility model, the coil 30 includes a high voltage coil 34, and the high voltage coil 34 is wound by an aluminum alloy wire, so that the high voltage coil has better economical performance under the condition of ensuring the electric power performance.

Further, the aluminum alloy wire is wrapped with heat-resistant paper, the heat-resistant paper has good electrical insulation performance, and the heat-resistant paper is wrapped outside the aluminum alloy wire to improve the insulation performance of the high-voltage coil 34.

According to some embodiments of the present utility model, the coil 30 includes a low voltage coil 32 and a high voltage coil 34, the transformer 100 further includes a main air channel structure 50, the low voltage coil 32 is sleeved outside the iron core 10, the high voltage coil 34 is sleeved outside the low voltage coil 32, and the main air channel structure 50 is sleeved between the low voltage coil 32 and the high voltage coil 34 for insulating the high voltage coil 34 from the low voltage coil 32. The main channel structure 50 comprises insulating paper 52, and the breakdown voltage of the insulating paper 52 ranges from 70kv/mm to 78kv/mm, so that the insulating paper has better insulating performance.

Specifically, the main air channel structure 50 includes two insulating paper layers 52 and a supporting strip 54 disposed between the two insulating paper layers 52, the insulating paper layers 52 are disposed at intervals by the supporting strip 54, and the three layers enclose to form a main air channel, so as to insulate the low-voltage coil 32 from the high-voltage coil 34.

Further, the insulating paper 52 has good heat resistance when resisting the temperature of 120 ℃, and can ensure that the temperature of the coil 30 is continuously below 120 ℃ and the electrical property is stable. Furthermore, the heat-resistant insulating paper 52 can prolong the service life of the transformer 100 and improve the product quality of the transformer 100.

Optionally, the insulating paper 52 is TUF-Flex adhesive tape, specifically Wei Deman TUF-Flex adhesive tape, which is a novel insulating paper specially used for interlayer insulation of the low-voltage coil 32 of the distribution transformer 100, and its extremely high mechanical properties can bear the impact of various forces in the winding process, and the TUF-Flex insulating paper 52 with thinner thickness and higher mechanical strength can effectively reduce the average turnover length of the winding of the coil 30 and the size of the coil 30, thereby reducing the usage of other high-cost raw materials (such as copper wires, iron cores 10, oil tanks, transformer 100 oil, etc.).

Still alternatively, the thickness of the insulating paper 52 is 0.035-0.078, such as the thickness of the insulating paper 52 is 0.038, 0.051 and 0.076.

According to some embodiments of the present utility model, the transformer 100 further includes a high-voltage oil passage provided in the high-voltage coil 34, and a low-voltage oil passage provided in the low-voltage coil 32, the low-voltage oil passage and the high-voltage oil passage being made of DPE insulating paper. The DPE insulating paper is made of 100% pure natural wood fiber, is novel insulating paper specially used for insulating between the high-voltage coil 34 and the high-voltage coil 32 of the distribution transformer, and has a temperature resistance grade of 130C in mineral oil and a temperature grade of 140C in vegetable oil. The DPE insulating paper has high electrical properties, short drying time, fast wetting speed, high heat-resistant level, etc. characteristics that can optimize the overall performance of the transformer 100.

According to some embodiments of the present utility model, the present utility model provides a transformer 100, which includes an iron core 10 and a coil 30, wherein the coil 30 is wound outside the iron core 10, and the coil 30 and the iron core 10 cooperate to perform voltage conversion operation. Wherein the coil 30 is wound around the axial direction of the core 10, and the cross section of the core 10 is oval-like along the direction intersecting the axial direction of the core 10, so that the number of laminations required for the oval-like section core 10 is smaller and the cost is lower than that of the conventional circular-section core. Meanwhile, the structure of the elliptical iron core 10 and the coil 30 has better short circuit resistance.

And, coil 30 includes low-voltage coil 32 and high-voltage coil 34, and low-voltage coil 32 cover is located outside the iron core 10, and low-voltage coil 32 is located outside to high-voltage coil 34 cover, and low-voltage coil 32 adopts the aluminium foil coiling, and high-voltage coil 34 adopts aluminum alloy wire coiling, can guarantee the electric property of coil 30, improves economic performance simultaneously, reduces the cost of transformer 100 manufacturing. In addition, the transformer 100 further includes a main air channel structure 50, the main air channel structure 50 is sleeved between the low-voltage coil 32 and the high-voltage coil 34, and is used for insulating and isolating the low-voltage coil 32 and the high-voltage coil 34, and the insulating paper 52 of the main air channel structure 50 is TUF-Flex adhesive tape, so that the high-temperature resistance, the mechanical strength and the insulation resistance are better, and the product quality of the transformer 100 can be improved.

Referring to fig. 1-3, according to some embodiments of the present utility model, a warrior preassembled transformer substation 200 is provided, which includes the transformer 100 according to any of the above embodiments, wherein the transformer 100 includes an iron core 10 and a coil 30 wound around the iron core 10. The coil 30 is wound around the core 10 in the axial direction, and the cross section of the core 10 is elliptical in the direction intersecting the core 10 in the axial direction.

The cross section of the iron core 10 required by the conventional circular coil 30 is required to be circular, but when the iron core is formed by lamination, the cross section can be more similar to the circular shape only when the number of laminations is larger, which brings great difficulty to the manufacture of the iron core 10 and increases the production cost. In the transformer 100 provided by the utility model, the cross section of the iron core 10 is in an elliptical shape, the iron core 10 is not required to be formed by a plurality of lamination sheets, the number of the lamination sheets required in the lamination process is small, and the iron core 10 is simpler to manufacture and has lower cost. Meanwhile, the structure of the elliptical iron core 10 and the coil 30 has better short circuit resistance.

Further, the warrior pre-installed transformer substation 200 further includes a low-voltage cabinet 230 and a high-voltage cabinet 210, and the low-voltage cabinet 230 and the transformer 100 are disposed on the same side of the high-voltage cabinet 210. That is, the low-voltage cabinet 230 and the transformer 100 are arranged outside the high-voltage cabinet 210 side by side, so that the low-voltage cabinet 230 and the high-voltage cabinet 210 form an L-shaped structure, and the transformer 100 is arranged at the opening of the L-shaped structure, so that the whole warfarin-type preassembled transformer substation 200 is compact in structure and prevented from being oversized.

Specifically, the high-voltage cabinet 210 is a high-voltage five-in-one vacuum circuit breaker cabinet, and comprises a vacuum circuit breaker, a disconnecting switch, a grounding switch, a current transformer and a lightning arrester, so that the warfarin-type pre-installed transformer substation 200 has the functions of overload, undervoltage, short circuit protection and the like, and can protect lines and equipment from being damaged due to faults.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The transformer is characterized by being arranged in a Hua type preassembled transformer substation and comprising an iron core and a coil wound outside the iron core;

the coil is wound around the axial direction of the iron core, and the cross section of the iron core is elliptical along the direction intersecting with the axial direction of the iron core.

2. The transformer of claim 1, wherein the coil comprises a low voltage coil wound with aluminum foil.

3. The transformer of claim 1, wherein the coil comprises a high voltage coil wound with an aluminum alloy wire.

4. A transformer according to claim 3, wherein the aluminium alloy wire is wrapped with heat resistant paper.

5. The transformer of claim 1, wherein the coil comprises a low voltage coil and a high voltage coil, the transformer further comprising a main air path structure;

the low-voltage coil is sleeved outside the iron core, the high-voltage coil is sleeved outside the low-voltage coil, and the main air channel structure is sleeved between the low-voltage coil and the high-voltage coil;

the main channel structure comprises insulating paper, and the breakdown voltage of the insulating paper ranges from 70kv/mm to 78kv/mm.

6. The transformer of claim 5, wherein the insulating paper is resistant to temperatures of 120 ℃.

7. The transformer of claim 6, wherein the insulating paper is TUF-Flex-point-glued paper.

8. A pre-installed substation of the type described in any of the preceding claims 1-7, characterized by comprising a transformer.

9. The warfarin-type preassembled transformer substation of claim 8 further comprising a low-voltage cabinet and a high-voltage cabinet, the low-voltage cabinet and the transformer being disposed on a same side of the high-voltage cabinet.

10. The warfarin-type preassembled transformer substation of claim 9, wherein the high-voltage cabinet is a high-voltage five-in-one vacuum circuit breaker cabinet comprising a vacuum circuit breaker, a disconnecting switch, a grounding switch, a current transformer and a lightning arrester.