Q-reducing device for dry-type air-core reactor and dry-type air-core reactor

Abstract

The utility model discloses a Q-reducing device for a dry-type air-core reactor and the dry-type air-core reactor, and the Q-reducing device comprises a frame body which comprises at least two Q-reducing plates which are connected with each other; and the connecting sheets are in one-to-one correspondence with the Q-reducing plates, the top end surfaces of the connecting sheets are fixedly connected with the Q-reducing plates, and the bottom end surfaces of the connecting sheets are fixedly connected with the top of the star-shaped frame to which the dry-type air-core reactor belongs. According to the Q-reducing device for the dry-type air-core reactor provided by the embodiment of the utility model, a plurality of Q-reducing plates are connected with one another, and the number and the structure of the connecting mode can be adjusted according to the structure of a star-shaped frame of the dry-type air-core reactor, so that the Q-reducing device can be fixed at the top of the star-shaped frame; and therefore, the harmonic stray loss of the dry-type air-core reactor can be increased in the use process, and stable control of the Q-reducing process can be achieved.

Description

Technical Field

[0001] This utility model relates to a Q-reduction device for dry-type air-core reactors and a dry-type air-core reactor, belonging to the field of reactor technology. Background Technology

[0002] In AC power systems, such as dry-type air-core reactors (hereinafter referred to as "reactors"), filters are typically used to prevent harmonics from entering the system. These filters are usually capacitors connected in parallel to the system and can also provide reactive power compensation or serve as part of the static var compensator (SVC). The types of parallel filters used include single-tuned (high Q), bandpass (low Q), and high-damping filters, where Q represents the quality factor. The required level of the quality factor is adjusted according to the actual needs of the system.

[0003] In the high-frequency circuit module and mounting structure of the high-frequency circuit published in patent publication number (JP3468674B2), a first dielectric cut-off hole is opened in the third dielectric layer at a position opposite to the strip resonant line. A metal plate is provided to block the first dielectric cut-off hole to change the electromagnetic environment of the resonant line and prevent the Q value from decreasing due to dielectric loss. That is, the above patent discloses changing the Q value by means of a metal plate. The existing methods for reducing the Q value of reactors are mainly achieved by adding resistors or directly using low-Q reactors. However, the above methods have certain limitations: adding resistors is too dependent on the performance of the resistors, and damage will affect the use of dry-type air-core reactors; using low-Q reactors will limit the application scenarios of the reactor. Therefore, a Q-reduction device that can stably adjust the Q value is needed. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a Q-reduction device for dry-type air-core reactors and a dry-type air-core reactor, so as to stabilize and control the Q value of the reactor.

[0005] To achieve the above objectives, this utility model provides a Q-reduction device for dry-type air-core reactors, comprising:

[0006] The frame consists of at least two interconnected Q-reducing plates;

[0007] The connecting piece corresponds one-to-one with the Q-reducing plate, with its top end face fixedly connected to the Q-reducing plate and its bottom end face fixedly connected to the top of the star-shaped frame to which the dry-type air-core reactor belongs.

[0008] Furthermore, the frame includes four of the aforementioned Q-reducing plates and a central connecting shaft;

[0009] The central connecting shaft is provided with four axial grooves, and the Q-reducing plate is fixedly connected to the central connecting shaft through the axial grooves.

[0010] Furthermore, the frame is a quadrilateral frame formed by splicing four pieces of the reduced Q-plate material.

[0011] Furthermore, the Q-reducing plate and the connecting piece are an integral structure, and the connecting piece is fixedly connected to the star-shaped frame by bolts through through holes.

[0012] Furthermore, the top of the star-shaped frame is provided with a groove that matches the frame body.

[0013] Secondly, this utility model also provides a dry-type air-core reactor, which applies the Q-reduction device provided in the first aspect, including:

[0014] Reactor body;

[0015] A star-shaped bracket is fixed to the top of the reactor body, and a Q-reduction device is fixed to the top of the star-shaped bracket;

[0016] At least three support column insulators are fixedly connected to the reactor body.

[0017] Furthermore, the support column insulator includes an insulating support column, an insulating connector, and a bottom fixing component;

[0018] The insulating support column is fixedly connected to the reactor body;

[0019] The bottom of the support column insulator is fixedly connected to the bottom fixing member.

[0020] By adopting the above technical solution, the present invention provides a Q-reduction device and a dry-type air-core reactor for a dry-type air-core reactor. Multiple Q-reduction plates are interconnected. The connection method can be adjusted in terms of quantity and structure according to the structure of the star-shaped frame of the dry-type reactor, so as to fix it on the top of the star-shaped frame. This increases the harmonic stray loss of the dry-type air-core reactor during use, thereby achieving stable control of the Q-reduction process. Attached Figure Description

[0021] Figure 1 A schematic diagram of the connection between a Q-reduction device and a dry-type air reactor provided by this utility model;

[0022] Figure 2 A schematic diagram of the structure of a Q-reduction device provided by this utility model;

[0023] Figure 3 This is a schematic diagram of another Q-reduction device provided by this utility model.

[0024] In the diagram: 1. Frame; 2. Q-reducing plate; 3. Connecting piece; 4. Star frame; 5. Central connecting shaft; 6. Reactor body; 7. Support column insulator; 8. Insulating support column; 9. Insulating connector; 10. Bottom fixing component. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Typically, the Q value of a dry-type air-core reactor is reduced by adding a resistor or using a low-Q reactor; however, these methods rely excessively on the performance of the resistor and reactor, thus requiring a more stable Q-reduction device.

[0026] Example 1

[0027] like Figures 1 to 3 As shown, this utility model provides a Q-reduction device for dry-type air-core reactors, comprising:

[0028] The frame 1 includes at least two interconnected Q-reducing plates 2; it should be noted that the frame 1 can be adjusted according to the structure of the dry-type air-core reactor.

[0029] For example, the frame 1 may include four Q-reducing plates 2 and a central connecting shaft 5; the central connecting shaft 5 has four axial grooves, and the Q-reducing plates 2 are fixedly connected to the central connecting shaft 5 through the axial grooves; or the frame 1 may be a quadrilateral frame formed by splicing four Q-reducing plates 2. The function of the frame 1 is to induce eddy current losses in the dry-type air-core reactor under the action of a magnetic field. By adjusting the number and structure of the Q-reducing plates 2, the harmonic stray losses of the dry-type air-core reactor can be adjusted. This adjustment can be by increasing or decreasing, for example, by increasing the number of Q-reducing plates 2 to reduce the quality factor Q.

[0030] In the high-frequency circuit module and high-frequency circuit mounting structure disclosed in patent publication number (JP3468674B2), a first dielectric cut-off hole is opened in the third dielectric layer at a position opposite to the strip resonant line. A metal plate is provided to block the first dielectric cut-off hole in order to change the electromagnetic environment of the resonant line and prevent the Q value from decreasing due to dielectric loss. That is, the above patent discloses the change of Q value by changing the metal plate.

[0031] The Q-reducing plate is the same as the aforementioned patent. It is a conductive metal plate installed in a specific location to change the electromagnetic field distribution and introduce controllable losses. That is, the metal conductor will change the field distribution in the alternating electromagnetic field and affect the Q value of the system through effects such as eddy currents and mirror currents.

[0032] Connecting piece 3 corresponds one-to-one with the Q-reduction plate 2. Its top end face is fixedly connected to the Q-reduction plate 2, and its bottom end face is fixedly connected to the top of the star-shaped frame 4 to which the dry-type air-core reactor belongs. During the fixing process, the top of the star-shaped frame 4 has a groove matching the frame body 1. In an optional embodiment, the Q-reduction plate 2 and the connecting piece 3 are an integral structure, and the connecting piece 3 is fixedly connected to the star-shaped frame 4 with bolts through a through hole. After fixing, the frame body 1 and the star-shaped frame 4 are at the same potential.

[0033] The present invention provides a Q-reduction device for dry-type air-core reactors, which uses multiple Q-reduction plates connected to each other. The connection method can be adjusted in terms of quantity and structure according to the structure of the star-shaped frame of the dry-type reactor to achieve the goal of fixing it to the top of the star-shaped frame. This increases the harmonic stray loss of the dry-type air-core reactor during use, thereby achieving stable control of the Q-reduction process.

[0034] Example 2

[0035] Based on Embodiment 1, this utility model embodiment provides a dry-type air-core reactor, such as... Figure 1 As shown, it includes:

[0036] Reactor body 6;

[0037] A star-shaped bracket 4 is fixed to the top of the reactor body 6, and a Q-reduction device is fixed to the top of the star-shaped bracket 4;

[0038] At least three support column insulators 7 are fixedly connected to the reactor body 6. Each support column insulator 7 includes an insulating support column 8, which may be made of insulating ceramic to provide insulation; an insulating connector 9; and a bottom fixing member 10.

[0039] The insulating support column 8 is fixedly connected to the reactor body 6;

[0040] The bottom of the support column insulator 7 is fixedly connected to the bottom fixing member 10. The bottom fixing member 10 is usually made of metal to ensure that it has the strength required to support the dry-type air-core reactor.

[0041] The dry-type air-core reactor provided in this embodiment of the present invention has the same technical concept and achieves the same technical effect as the Q-reduction device for dry-type air-core reactors provided in the aforementioned embodiment, and will not be described again here.

[0042] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A Q-reduction device for dry-type air-core reactors, characterized in that, include: The frame (1) includes at least two interconnected Q-reducing plates (2); The connecting piece (3) corresponds one-to-one with the Q-reducing plate (2), with its top end face fixedly connected to the Q-reducing plate (2) and its bottom end face fixedly connected to the top of the star frame (4) to which the dry-type air-core reactor belongs.

2. The Q-reduction device for dry-type air-core reactors as described in claim 1, characterized in that: The frame (1) includes four Q-reducing plates (2) and a central connecting shaft (5); The central connecting shaft (5) is provided with four axial grooves, and the Q-reducing plate (2) is fixedly connected to the central connecting shaft (5) through the axial grooves.

3. The Q-reduction device for dry-type air-core reactors as described in claim 1, characterized in that: The frame (1) is a quadrilateral frame formed by splicing together four pieces of the Q-reducing plate (2).

4. The Q-reduction device for dry-type air-core reactors as described in claim 1, characterized in that: The Q-reducing plate (2) and the connecting piece (3) are an integral structure. The connecting piece (3) is fixedly connected to the star-shaped frame (4) through the through hole using bolts.

5. The Q-reduction device for dry-type air-core reactors as described in claim 1, characterized in that: The star-shaped frame (4) has a groove on its top that matches the frame body (1).

6. A dry-type air-core reactor, employing the Q-reduction device according to any one of claims 1-5, characterized in that, include: Reactor body (6); A star-shaped frame (4) is fixed to the top of the reactor body (6), and a Q-reduction device is fixed to the top of the star-shaped frame (4); At least three support column insulators (7) are fixedly connected to the reactor body (6).

7. The dry-type air-core reactor as described in claim 6, characterized in that, The support column insulator (7) includes an insulating support column (8), an insulating connector (9), and a bottom fixing member (10); The insulating support column (8) is fixedly connected to the reactor body (6); The bottom of the support column insulator (7) is fixedly connected to the bottom fixing member (10).

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