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

Abstract

The invention 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 invention, 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] The invention relates to a Q reduction device for a dry-type air-core reactor and the dry-type air-core reactor, belonging to the technical field of reactors. Background Art

[0002] In AC power systems, such as dry-type air-core reactors (hereinafter referred to as "reactors"), filters are usually used to prevent harmonics from entering the system. The filter is usually a capacitor, which is connected in parallel to the system and can also provide reactive power compensation as part of a static reactive power system (SVC, StaticVarCompensator). 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 need for a high or low quality factor is adjusted according to the actual needs of the system.

[0003] The method of reducing the Q value used by existing reactors is mainly achieved by adding resistors or directly using low-Q value reactors, but the above implementation methods all have certain limitations: the method of adding resistors relies too much on the performance of the resistors, and once damage occurs, it will affect the use of dry-type air-core reactors; the use of low-Q value reactors will limit the use scenarios of the reactor, so a Q reduction device that can stably adjust the Q value is needed. Summary of the invention

[0004] Therefore, an object of the present invention is to provide a Q-reducing device for a dry-type air-core reactor and a dry-type air-core reactor, so as to stably control the Q value of the reactor.

[0005] In order to achieve the above object, the present invention provides a Q reduction device for a dry-type air-core reactor, comprising:

[0006] A frame body, comprising at least two Q-reducing plates connected to each other;

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

[0008] Furthermore, the frame includes four pieces of the 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 via the axial grooves.

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

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

[0012] Furthermore, a groove matching the frame body is provided on the top of the star-shaped frame.

[0013] In a second aspect, the present invention further provides a dry-type air-core reactor, using the Q reduction device provided in the first aspect, comprising:

[0014] Reactor body;

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

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

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

[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 piece.

[0020] By adopting the above technical scheme, a Q reduction device for a dry-type air-core reactor and a dry-type air-core reactor provided in an embodiment of the present invention adopt a plurality of Q reduction plates connected to each other, and the connection method can be adjusted in quantity and structure according to the structure of the star frame of the dry-type reactor so as to be fixed on the top of the star frame, thereby increasing the harmonic stray loss of the dry-type air-core reactor during use, thereby achieving stable control of the Q reduction process. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 A schematic diagram of the structure of a Q reduction device provided by the present invention;

[0023] Figure 3 A schematic structural diagram of another Q-reducing device provided by the present invention.

[0024] In the figure: 1. frame; 2. Q-reducing plate; 3. connecting piece; 4. star frame; 5. central connecting shaft; 6. reactor body; 7. supporting column insulator; 8. insulating supporting column; 9. insulating connector; 10. bottom fixing piece. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below through the accompanying drawings and specific implementation methods. Generally, the method of reducing the Q value of a dry-type air-core reactor is mainly by adding a resistor or using a low-Q value reactor; however, the above Q reduction method is overly dependent on the performance of the resistor and the reactance, so a Q reduction device with a more stable Q reduction is needed.

[0026] Embodiment 1

[0027] like Figures 1 to 3 As shown, the present invention provides a Q reduction device for a dry-type air-core reactor, comprising:

[0028] The frame 1 includes at least two Q-reducing plates 2 connected to each other. 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 pieces of the 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 plates 2 are fixedly connected to the central connecting shaft 5 through the axial grooves; or the frame 1 is a quadrilateral frame formed by splicing four pieces of the Q-reducing plates 2. The function of the frame 1 is to make the dry-type air-core reactor generate eddy current loss under the action of the magnetic field, and to adjust the harmonic stray loss of the dry-type air-core reactor by adjusting the number and structure of the Q-reducing plates 2. This adjustment can be an increase or decrease, for example, by increasing the Q-reducing plates 2 to reduce the quality factor Q.

[0030] The connecting piece 3 corresponds to the Q-reducing plate 2 one by one, the top end face is fixedly connected to the Q-reducing plate 2, and the bottom end face is fixedly connected to the top of the star frame 4 to which the dry-type air-core reactor belongs. During the fixing process, a groove matching the frame 1 is provided on the top of the star frame 4. In an optional embodiment, the Q-reducing plate 2 and the connecting piece 3 are an integral structure, and the connecting piece 3 is fixedly connected to the star frame 4 by bolts through a through hole. After fixing, the frame 1 and the star frame 4 are at the same potential.

[0031] A Q reduction device for a dry-type air-core reactor provided in an embodiment of the present invention adopts a plurality of Q reduction plates connected to each other. The connection method can be adjusted in quantity and structure according to the structure of the star frame of the dry-type reactor to achieve the goal of being fixed on the top of the star frame, thereby increasing the harmonic stray loss of the dry-type air-core reactor during use, thereby achieving stable control of the Q reduction process.

[0032] Embodiment 2

[0033] The embodiment of the present invention provides a dry-type air-core reactor based on the first embodiment. Figure 1 As shown, including:

[0034] Reactor body 6;

[0035] A star frame 4 is fixed to the top of the reactor body 6, and a Q reduction device is fixed on the top of the star frame 4;

[0036] At least three support column insulators 7, the support column insulators 7 are fixedly connected to the reactor body 6. The support column insulators 7 include insulating support columns 8, which can be made of insulating ceramics to play an insulating role; insulating connectors 9 and bottom fixing members 10;

[0037] The insulating support column 8 is fixedly connected to the reactor body 6;

[0038] 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 the required strength for supporting the dry-type air-core reactor.

[0039] A dry-type air-core reactor provided in an embodiment of the present invention adopts the same technical concept as the Q-reducing device for a dry-type air-core reactor provided in the aforementioned embodiment and achieves the same technical effect, which will not be described in detail here.

[0040] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. A Q reduction device for a dry-type air-core reactor, characterized in that: include: The frame (1) comprises at least two Q-reducing plates (2) connected to each other; The connecting piece (3) corresponds to the Q-reducing plate (2) one by one, the top end surface is fixedly connected to the Q-reducing plate (2), and the bottom end surface is 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 reactor according to claim 1, characterized in that: The frame (1) comprises 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) via the axial grooves.

3. The Q reduction device for dry-type air-core reactor according to claim 1, characterized in that: The frame (1) is a quadrilateral frame formed by splicing four pieces of Q-reducing plates (2).

4. The Q reduction device for dry-type air-core reactor according to claim 1, characterized in that: The Q-reducing plate (2) and the connecting plate (3) are an integral structure, and the connecting plate (3) is fixedly connected to the star frame (4) via a through hole by means of bolts.

5. The Q reduction device for dry-type air-core reactor according to claim 1, characterized in that: The top of the star-shaped frame (4) is provided with a groove matching the frame body (1).

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

7. The dry-type air-core reactor according to claim 6, characterized in that: The support column insulator (7) comprises 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 piece (10).

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