Low-loss high-impedance power transformer

Abstract

The invention discloses a low-loss high-impedance power transformer which comprises a voltage transformation assembly, the voltage transformation assembly comprises a second shell, a power transformer body is arranged in the second shell, a driving box is embedded in the second shell and located on the ground and underground, and a ball reciprocating lead screw and a driving motor are arranged in the driving box; one end of a driving motor shaft is connected with one end of the ball reciprocating screw, and an impedance assembly is arranged at one end of the second shell; the impedance assembly comprises a first shell located at one end of the second shell, a heat dissipation and dust removal assembly is arranged on one side of the first shell, and an opening is formed in the other side of the first shell; the heat dissipation and dust removal assembly comprises a box body fixed to one side of the first shell, the bottom of the first shell is connected with the ball reciprocating lead screw, and an electric reactor is arranged in the first shell and electrically connected with the power transformer body. According to the device, the power transformer main body and the reactor can be maintained conveniently while independent heat dissipation of the power transformer main body and the reactor is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of power transformers, in particular to a low-loss high-impedance power transformer. Background Art

[0002] A power transformer is a static electrical device that is used to convert a certain value of AC voltage (current) into another or several different values ​​of voltage (current) with the same frequency. The power transformer is a key device for voltage conversion in the power system. It realizes energy transfer between different voltage levels through the principle of electromagnetic induction. The main function of the transformer is to receive electrical energy from a power station or a higher-level power grid, and then convert it into a voltage level suitable for a specific load or the next-level power grid. This process is essential to ensure the efficient operation of the power system and the stability of power supply. Power transformers are widely used in power stations, substations and distribution networks. They can increase or decrease voltage as needed, optimize power transmission efficiency and reduce line losses.

[0003] At present, there are some limitations in the practical application of power transformers, especially in their use with reactors. Reactors are reactive compensation devices that prevent rapid changes in current by introducing inductive loads, thereby improving the stability of the power system and reducing voltage fluctuations. However, for the convenience of wiring, power transformers are usually arranged in parallel with reactors. Although this layout simplifies the installation process, it also brings challenges in maintenance and heat dissipation. Since the spacing between the two is usually fixed, this limits the convenience of maintenance from the back of the transformer and reactor, increasing the difficulty and risk of maintenance work. In addition, the close distance between the transformer and the reactor will also affect their heat dissipation effect, which may cause the equipment to overheat and affect the operating efficiency and service life of the power transformer and reactor. Therefore, how to improve the maintenance convenience and heat dissipation performance of the equipment while ensuring the stability of the power system is a problem that needs to be solved in the current design and application of power transformers.

[0004] In view of this, a low-loss high-impedance power transformer is needed. Summary of the invention

[0005] The shortcomings of the prior art are: at present, power transformers are usually used in conjunction with reactors, which can prevent current changes. In order to facilitate wiring, power transformers and reactors are usually arranged in parallel in the longitudinal direction, and the distance between the power transformer and the reactor is fixed, which makes it inconvenient to perform maintenance work from the back of the power transformer and the reactor. At the same time, the distance between the two is too close, which affects the heat dissipation effect of the power transformer and the reactor. In view of the above shortcomings, the present invention provides a low-loss high-impedance power transformer, which can be embedded in the ground by a drive box, and a ball reciprocating screw is arranged inside the drive box. The ball reciprocating screw can drive the first shell to move linearly, thereby expanding the distance between the first shell and the second shell, making it more convenient for the staff to operate, and by arranging a heat dissipation and dust removal component on one side of the first shell, the airflow fan can be used to drive the flow of air inside the first shell to achieve the purpose of rapid heat dissipation, thereby ensuring the stability of the reactor and the power transformer body during operation, ensuring that the power transformer body and the reactor dissipate heat separately, and at the same time, it is convenient to perform maintenance work on the power transformer body and the reactor. The specific technical scheme is as follows:

[0006] A low-loss high-impedance power transformer comprises a transformer assembly, the transformer assembly comprises a second shell, a power transformer body is arranged inside the second shell, the second shell is located above ground, a drive box is embedded underground, a ball reciprocating screw and a drive motor are arranged inside the drive box, one end of the drive motor shaft is connected to one end of the ball reciprocating screw, and an impedance assembly is arranged at one end of the second shell;

[0007] The impedance component comprises a first shell located at one end of a second shell, the bottom of the first shell is connected to the ball reciprocating screw, a reactor is arranged inside the first shell, and the reactor is electrically connected to the power transformer body.

[0008] Preferably, a heat dissipation and dust removal component is provided on one side of the first shell, and an opening is provided on the other side of the first shell;

[0009] The heat dissipation and dust removal assembly includes a box body fixed on one side of a first shell body, an electrostatic electrode plate and a dust collecting electrode plate are fixedly connected to the inner wall of the box body, the electrostatic electrode plate is located on one side of the dust collecting electrode plate, a first isolation net is provided on one side of the dust collecting electrode plate, an air flow fan is provided on one side of the first isolation net, a meandering channel is provided on one side of the air flow fan, a diverter plate is connected to one side of the meandering channel, and the meandering channel is made of insulating rubber material.

[0010] Preferably, an opening is provided at the top of the first isolation net, a collecting box is inserted into the opening, an electric cylinder is fixedly connected to one side of the first isolation net, one end of the electric cylinder is connected to the collecting box, and the collecting box is located on the bottom side of the dust collecting electrode plate.

[0011] Preferably, an opening is provided at the top of the collection box, a scraper is provided on the top side of the opening, an adsorption fan is fixedly connected to the inner wall of the collection box, and a second isolation net is provided on the top of the adsorption fan.

[0012] Preferably, a support block is fixedly connected to the inner wall of the collection box, and adsorption cotton is arranged on the top of the support block, and the material of the adsorption cotton is sponge.

[0013] Preferably, both ends of the first shell are provided with openings, a first door body is hingedly connected to the inner side of the opening at one end of the first shell, a lower partition is fixedly connected to the inner side of the opening at the other end of the first shell, a slot is provided on the inner side of the opening at the other end of the first shell, an upper partition is inserted into the slot, the upper partition is located on the top of the lower partition, and notches are provided on the upper partition and the lower partition, and the positions of the notches correspond to each other.

[0014] Preferably, both ends of the second shell are provided with openings, and a second door body is hingedly connected to the inner side of one end opening.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) This device ensures that the power transformer body and the reactor are cooled separately, and can also facilitate maintenance work on the power transformer body and the reactor.

[0017] (2) The device embeds a drive box underground, and a ball reciprocating screw is arranged inside the drive box. The ball reciprocating screw can drive the first shell to move linearly, thereby expanding the distance between the first shell and the second shell, making it more convenient for the staff to operate.

[0018] (3) The device disposes a heat dissipation and dust removal assembly on one side of the first shell, and uses an air flow fan to drive the flow of air inside the first shell to achieve the purpose of rapid heat dissipation, thereby ensuring the stability of the reactor and the power transformer body during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0020] Figure 1 A top view of a low-loss high-impedance power transformer according to the present invention;

[0021] Figure 2 It is a front view of a first shell of a low-loss high-impedance power transformer of the present invention;

[0022] Figure 3It is a front view of a first shell of a low-loss high-impedance power transformer of the present invention;

[0023] Figure 4 A cross-sectional view of a box of a low-loss high-impedance power transformer of the present invention;

[0024] Figure 5 A cross-sectional view of a collecting box of a low-loss high-impedance power transformer of the present invention;

[0025] Figure 6 The present invention is a front view of a second shell of a low-loss high-impedance power transformer.

[0026] In the figure: 1. drive motor; 2. drive box; 3. ball reciprocating screw; 4. impedance component; 41. first door body; 42. first shell body; 43. upper partition; 44. heat dissipation and dust removal component; 441. electrostatic electrode plate; 442. box body; 443. dust collecting electrode plate; 444. collecting box; 445. electric cylinder; 446. diverter plate; 447. first isolation net; 448. air flow fan; 449. circular channel; 4410. scraper; 4411. adsorption cotton; 4412. support block; 4413. second isolation net; 4414. adsorption fan; 45. lower partition; 46. reactor; 5. transformer component; 51. second shell body; 52. second door body; 53. power transformer body. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0029] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Example 1

[0032] A low-loss high-impedance power transformer comprises a transformer assembly 5, the transformer assembly 5 comprises a second shell 51, a power transformer body 53 is arranged inside the second shell 51, both ends of the second shell 51 are provided with openings, and a second door 52 is hinged inside the opening at one end; this structure facilitates the repair and maintenance of the power transformer body 53 inside the second shell 51; and an upper partition 43 and a lower partition 45 are also arranged inside the opening at the other end of the second shell 51 to facilitate repair and wiring work; the second shell 51 is located on the ground, and a drive box 2 is embedded underground, and a drive box 2 is arranged inside The ball reciprocating screw 3 and the driving motor 1, one end of the driving motor 1 shaft is connected to one end of the ball reciprocating screw 3, and an impedance component 4 is provided at one end of the second housing 51; the ball reciprocating screw 3 is composed of a fixed seat, a threaded rod, and a screw slide, and the top of the screw slide is fixed to the bottom of the first housing 42, so that the driving motor 1 drives the threaded rod of the ball reciprocating screw 3 to rotate, and the threaded rod drives the screw slide and the first housing 42 to move during the rotation process, so as to adjust the distance between the second housing 51 and the first housing 42, so as to provide a larger operating space when servicing the second housing 51 and the first housing 42;

[0033] The impedance component 4 includes a first shell 42 located at one end of the second shell 51, a heat dissipation and dust removal component 44 is provided on one side of the first shell 42, an opening is provided on the other side of the first shell 42, and a first isolation net 447 is also provided inside the opening on the other side of the first shell 42 to intercept external dust and prevent dust from entering the first shell 42;

[0034] The heat dissipation and dust removal component 44 includes a box body 442 fixed on one side of the first shell body 42, and an electrostatic electrode plate 441 and a dust collecting electrode plate 443 are fixedly connected to the inner wall of the box body 442, and the electrostatic electrode plate 441 is located on one side of the dust collecting electrode plate 443, and a first isolation net 447 is arranged on one side of the dust collecting electrode plate 443, and an air flow fan 448 is arranged on one side of the first isolation net 447, and a meander channel 449 is arranged on one side of the air flow fan 448, and a diverter plate 446 is connected to one side of the meander channel 449, and the meander channel 449 is made of insulating rubber material; this structure can absorb and collect dust in the air by arranging the electrostatic electrode plate 441 and the dust collecting electrode plate 443, and prevent dust from entering the first shell body 42; through the airflow The fan 448 can drive the flow of air, and use the air flow to drive the heat inside the first shell 42 to dissipate in time, so as to achieve the purpose of heat dissipation; an opening is provided at the top of the first isolation net 447, and a collection box 444 is inserted in the opening; an electric cylinder 445 is fixedly connected to one side of the first isolation net 447, and one end of the electric cylinder 445 is connected to the collection box 444, and the collection box 444 is located on the bottom side of the dust collecting electrode plate 443; this structure can push the collection box 444 to move horizontally through the electric cylinder 445, and the collection box 444 can clean up the dust on the dust collecting electrode plate 443 during the movement; an opening is provided at the top of the collection box 444, and a scraper 4410 is provided on the top side of the opening. The scraper 4410 is made of insulating rubber, and the scraper 4410 is moved in the collection box 444 through the scraper 4410 During the process, the dust on the dust collecting electrode plate 443 can be scraped off, and the inner wall of the collection box 444 is fixedly connected to the adsorption fan 4414, and the top of the adsorption fan 4414 is provided with a second isolation net 4413; this structure can adsorb and collect the dust on the dust collecting electrode plate 443 through the adsorption fan 4414, so as to achieve the purpose of cleaning the dust on the dust collecting electrode plate 443 and ensure the adsorption effect of the dust collecting electrode plate 443; the inner wall of the collection box 444 is fixedly connected to the support block 4412, and the top of the support block 4412 is provided with adsorption cotton 4411, and the material of the adsorption cotton 4411 is sponge; this structure can adsorb dust and prevent the dust from being raised again by arranging the adsorption cotton 4411, so as to achieve the purpose of collecting dust; the support block 4412 can The first shell 42 is provided with an opening at both ends, a first door 41 is hingedly connected to the inner side of the opening at one end of the first shell 42, a lower partition 45 is fixedly connected to the inner side of the opening at the other end of the first shell 42, a slot is provided at the inner side of the opening at the other end of the first shell 42, an upper partition 43 is inserted into the slot, the upper partition 43 is located at the top of the lower partition 45, and notches are provided on the upper partition 43 and the lower partition 45, and the notches are located correspondingly; in this structure, the lower partition 45 is fixed to the first shell 42 by bolts and can be removed; the upper partition 43 can be separated from the lower partition 45 by sliding, which is convenient for repairing and wiring the reactor 46;The bottom of the first housing 42 is connected to the ball reciprocating screw 3, and a reactor 46 is arranged inside the first housing 42. The reactor 46 is electrically connected to the power transformer body 53, and the reactor 46 and the power transformer body 53 are connected in series. The reactor 46 and the power transformer body 53 are connected in series. The reactor 46 limits the rate of change of the AC current through its inductance. When the current tries to change quickly, the reactor 46 will generate a back electromotive force, thereby hindering the change of the current. Therefore, the reactor 46 has a current limiting function, achieving the purpose of reactive power compensation, and can reduce the flow of reactive power in the power grid, thereby indirectly reducing the loss of the line and the transformer, and then achieving low loss and high impedance of the power transformer body 53. ;

[0035] Working principle: When using the low-loss high-impedance power transformer, if the reactor 46 and the power transformer body 53 inside the first shell 42 and the second shell 51 need to be repaired, the drive motor 1 can be started to drive the ball reciprocating screw 3 to rotate, and the ball reciprocating screw 3 drives the distance between the first shell 42 and the second shell 51 to expand, and then the first door body 41, the second door body 52 and the upper partition 43 on the first shell 42 and the second shell 51 are opened, and the reactor 46 and the power transformer body 53 inside the first door body 41 and the second door body 52 are exposed, and maintenance work can be carried out. During the operation of the device, the airflow fan 448 drives the external air to enter Inside the box 442, after the air enters the box 442, the electrostatic electrode plate 441 on the inner wall of the box 442 electrostatically processes the dust in the air, and then the dust is electrostatically adsorbed when passing through the dust collecting electrode plate 443, and then the air passes through the first isolation net 447 and enters the inside of the circular channel 449, and then is evenly diverted from the diverter plate 446 to enter the inside of the first shell 42. When the dust on the dust collecting electrode plate 443 needs to be cleaned, the electric cylinder 445 is started, and the electric cylinder 445 pushes the collection box 444. During the startup process of the collection box 444, the scraper 4410 scrapes the dust on the dust collecting electrode plate 443 and is adsorbed into the adsorption cotton 4411 for collection, and waits for the adsorption cotton 4411 to be taken out and replaced.

[0036] In summary, the present invention embeds a drive box underground, and a ball reciprocating screw is arranged inside the drive box. The ball reciprocating screw can drive the first shell to move linearly, thereby expanding the distance between the first shell and the second shell, making it more convenient for the staff to operate. In addition, a heat dissipation and dust removal component is arranged on one side of the first shell, and an air flow fan can be used to drive the flow of air inside the first shell to achieve the purpose of rapid heat dissipation, thereby ensuring the stability of the reactor and the power transformer main body during operation, ensuring that the power transformer main body and the reactor dissipate heat separately, and also facilitating the maintenance of the power transformer main body and the reactor.

[0037] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A low-loss high-impedance power transformer, comprising a transformer assembly (5), the transformer assembly (5) comprising a second housing (51), a power transformer body (53) being arranged inside the second housing (51), Features: The second shell (51) is located above ground, and a drive box (2) is embedded underground; a ball reciprocating screw (3) and a drive motor (1) are arranged inside the drive box (2); one end of the shaft of the drive motor (1) is connected to one end of the ball reciprocating screw (3); an impedance component (4) is arranged at one end of the second shell (51); the impedance component (4) comprises a first shell (42) located at one end of the second shell (51); the bottom of the first shell (42) is connected to the ball reciprocating screw (3); and a reactor (46) is arranged inside the first shell (42).

2. A low-loss high-impedance power transformer according to claim 1, It is characterized in that A heat dissipation and dust removal assembly (44) is provided on one side of the first shell (42), and an opening is provided on the other side of the first shell (42).

3. A low-loss high-impedance power transformer according to claim 2, It is characterized in that The heat dissipation and dust removal component (44) comprises a box body (442) fixed on one side of the first shell body (42); an electrostatic electrode plate (441) and a dust collecting electrode plate (443) are fixedly connected to the inner wall of the box body (442); the electrostatic electrode plate (441) is located on one side of the dust collecting electrode plate (443); a first isolation net (447) is provided on one side of the dust collecting electrode plate (443); an air flow fan (448) is provided on one side of the first isolation net (447); a meandering channel (449) is provided on one side of the air flow fan (448); a diverter plate (446) is connected to one side of the meandering channel (449); and the meandering channel (449) is made of insulating rubber material.

4. A low-loss high-impedance power transformer according to claim 1, It is characterized in that An opening is provided at the top of the first isolation net (447), a collection box (444) is inserted into the opening, an electric cylinder (445) is fixedly connected to one side of the first isolation net (447), one end of the electric cylinder (445) is connected to the collection box (444), and the collection box (444) is located at the bottom side of the dust collecting electrode plate (443).

5. A low-loss high-impedance power transformer according to claim 1, It is characterized in that The collection box (444) has an opening at the top, a scraper (4410) is arranged on the top side of the opening, an adsorption fan (4414) is fixedly connected to the inner wall of the collection box (444), and a second isolation net (4413) is arranged on the top of the adsorption fan (4414).

6. A low-loss high-impedance power transformer according to claim 1, It is characterized in that The inner wall of the collection box (444) is fixedly connected to a support block (4412), and an adsorption cotton (4411) is arranged on the top of the support block (4412), and the material of the adsorption cotton (4411) is sponge.

7. A low-loss high-impedance power transformer according to claim 1, It is characterized in that Both ends of the first shell (42) are provided with openings, a first door body (41) is hingedly connected to the inner side of the opening at one end of the first shell (42), a lower partition (45) is fixedly connected to the inner side of the opening at the other end of the first shell (42), a slot is provided on the inner side of the opening at the other end of the first shell (42), an upper partition (43) is inserted into the slot, and the upper partition (43) is located on the top of the lower partition (45).

8. A low-loss high-impedance power transformer according to claim 7, It is characterized in that The upper partition plate (43) and the lower partition plate (45) are both provided with notches, and the positions of the notches correspond to each other.

9. A low-loss high-impedance power transformer according to claim 1, It is characterized in that The reactor (46) is electrically connected to the power transformer body (53).

10. A low-loss high-impedance power transformer according to claim 1, It is characterized in that Both ends of the second shell (51) are provided with openings, and a second door (52) is hingedly connected to the inner side of the opening at one end.

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