Generator rotor grounding protection rotor voltage acquisition device

Abstract

The utility model discloses a generator rotor grounding protection rotor voltage acquisition device, which comprises an insulating plate and at least two brush carriers arranged on the insulating plate and used for contacting with a slip ring of a generator, the insulating plate is arranged to be mounted on a generator shell, and the brush carriers are distributed on two opposite sides of the insulating plate. According to the generator rotor grounding protection rotor voltage acquisition device, the distance between the carbon brush and the grounding body is enlarged, the problem of protection misoperation caused by attachment of carbon powder and greasy dirt on the brush holder is greatly reduced, the reliability of system operation is improved, and the operation risk is reduced.

Description

Technical Field

[0001] This utility model relates to a generator rotor grounding protection rotor voltage acquisition device. Background Technology

[0002] Rotor grounding protection is an important protection for the insulation of the generator rotor to ground. If the resistance of the rotor winding of the generator set is low or a single grounding fault develops into a two-point grounding fault, the generator will suffer irreversible damage and endanger the stability of the power grid. Therefore, all generator sets need to be equipped with rotor grounding protection.

[0003] Chinese Patent Application No. 202311105810.9 discloses a generator rotor grounding protection device, method, and system, relating to the field of power automation technology. The device includes a first protection module, a second protection module, and a control module. The first protection module connects the generator rotor winding to the generator shaft, and the second protection module also connects to the generator rotor winding to the generator shaft. The control module is connected to both the first and second protection modules and controls whether the first and second protection modules output square wave voltage to the rotor winding based on the collected operating status of the first and second protection modules.

[0004] The aim is to provide an improved rotor voltage acquisition device for generator rotor grounding protection, particularly regarding how to avoid maloperation of rotor grounding protection during voltage acquisition, thereby preventing significant safety hazards to system operation. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a generator rotor grounding protection rotor voltage acquisition device, with the purpose of improving the safety of voltage acquisition.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a generator rotor grounding protection rotor voltage acquisition device, including an insulating plate and a brush holder disposed on the insulating plate and used to contact the generator slip ring. The insulating plate is configured to be installed on the generator housing, and at least two brush holders are provided, and the brush holders are distributed on opposite sides of the insulating plate.

[0007] Two brush holders are provided.

[0008] The insulating plate is detachably connected to the generator housing.

[0009] The insulating plate is connected to the generator housing by bolts, and the insulating plate is provided with mounting holes for the bolts to pass through.

[0010] The insulating board is made of epoxy resin.

[0011] The dimensions of the insulating board are 300mm*200mm*10mm.

[0012] The generator rotor grounding protection rotor voltage acquisition device of this utility model increases the distance between the carbon brush and the grounding body, and at the same time greatly reduces the problem of protection malfunction caused by carbon powder and oil stains adhering to the brush holder, thereby improving the reliability of system operation and reducing operational risks. Attached Figure Description

[0013] This manual includes the following figures, which illustrate the following:

[0014] Figure 1 This is a schematic diagram of the generator rotor grounding protection rotor voltage acquisition device of this utility model;

[0015] The markings in the diagram are: 1. Brush holder; 2. Insulating plate; 3. Mounting hole. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0017] like Figure 1 As shown, this utility model provides a generator rotor grounding protection rotor voltage acquisition device, including an insulating plate 2 and a brush holder 1 disposed on the insulating plate 2 and used to contact the generator slip ring. The insulating plate 2 is configured to be installed on the generator housing. At least two brush holders 1 are provided, and the brush holders 1 are distributed on opposite sides of the insulating plate 2.

[0018] Specifically, such as Figure 1 As shown, in this embodiment, the insulating plate 2 has insulating properties and is a rectangular plate. Two brush holders 1 are arranged on the insulating plate 2, with a certain distance between them. The two brush holders 1 are distributed on opposite sides of the insulating plate 2. The two brush holders 1 are fixed to the front and back sides of the insulating plate 2. The distance between the two brush holders 1 is determined according to the distance between the generator rotor slip rings. Then, the insulating plate 2 is fixed to the generator housing, ensuring reliable contact between the brush holders 1 and the slip rings. Because the distance between the two brush holders 1 is relatively large, the problem of protection malfunction caused by carbon powder adhesion generated by carbon brush grinding is avoided, thus improving the reliability of protection.

[0019] The insulating plate 2 is detachably connected to the generator housing for easy assembly and disassembly. In this embodiment, the insulating plate 2 is connected to the generator housing by bolts. The insulating plate 2 is provided with mounting holes 3 for the bolts to pass through. There are two mounting holes 3, which are arranged sequentially along the width direction of the insulating plate 2.

[0020] In this embodiment, the insulating board 2 is made of epoxy resin.

[0021] In this embodiment, the insulating plate 2 has dimensions of 300mm*200mm*10mm, a length of 300mm, a width of 200mm, and a thickness of 10mm. Two brush holders 1 are arranged along the length of the insulating plate 2.

[0022] Compared with existing rotor voltage acquisition devices, the generator rotor grounding protection rotor voltage acquisition device provided by this utility model increases the distance between the carbon brush and the grounding body, while greatly reducing the protection malfunction caused by carbon powder and oil stains adhering to the brush holder 1, improving the reliability of system operation and reducing operational risks.

[0023] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A generator rotor grounding protection rotor voltage acquisition device, characterized in that: It includes an insulating plate and brush holders disposed on the insulating plate for contact with generator slip rings. The insulating plate is configured for mounting on the generator housing. At least two brush holders are provided, and the brush holders are distributed on opposite sides of the insulating plate.

2. The generator rotor grounding protection rotor voltage acquisition device according to claim 1, characterized in that: Two brush holders are provided.

3. The generator rotor grounding protection rotor voltage acquisition device according to claim 1, characterized in that: The insulating plate is detachably connected to the generator housing.

4. The generator rotor grounding protection rotor voltage acquisition device according to claim 3, characterized in that: The insulating plate is connected to the generator housing by bolts, and the insulating plate is provided with mounting holes for the bolts to pass through.

5. The generator rotor grounding protection rotor voltage acquisition device according to any one of claims 1 to 4, characterized in that: The insulating board is made of epoxy resin.

6. The generator rotor grounding protection rotor voltage acquisition device according to any one of claims 1 to 4, characterized in that: The dimensions of the insulating board are 300mm*200mm*10mm.

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