High-frequency partial discharge sensor

Abstract

The utility model discloses a high-frequency partial discharge sensor, and the sensor comprises a first measurement part which comprises a first pedestal, an H-shaped structure disposed at one side of the first pedestal, a joint disposed in the H-shaped structure, and a first half magnet disposed in the first pedestal; the second measuring part comprises a second base, the second base is connected with the first base, a second half magnet is installed in the second base, and a connecting block is installed on one side of the second base; the fixing part comprises a fixing component, and the fixing component is installed at one end of the connecting block. According to the utility model, the ultra-microcrystalline material with high magnetic conductivity is used as the magnetic core of the sensor, so that the detection capability of micro current signals is improved, partial discharge signals under different frequencies can be effectively detected, meanwhile, a non-intrusive detection method is adopted, direct electrical connection with a detected cable is not needed, and the cost is reduced. Partial discharge detection can be carried out without power failure.

Description

Technical Field

[0001] This utility model relates to the field of partial discharge detection, and in particular to a high-frequency partial discharge sensor. Background Technology

[0002] With the continuous development of power systems and the improvement of voltage levels, coil insulation damage in power equipment has gradually become a major factor affecting the stable operation of large generators. Traditional power equipment maintenance methods rely on periodic shutdowns for inspection. While this method can detect and repair potential faults, it also brings problems such as long downtime and high maintenance costs. In order to reduce maintenance costs and improve equipment operating efficiency, there is an increasing tendency to adopt online monitoring technology to monitor the insulation degradation of equipment in real time.

[0003] Partial discharge is one of the important indicators of insulation aging. Its detection technology is mainly based on various physical phenomena generated by partial discharge. The insulation condition is evaluated by monitoring the physical quantities of these phenomena. During the partial discharge process of a generator, electrical pulses and electromagnetic radiation are generated, which can cause local overheating. Due to its high sensitivity and simplicity, the pulse current detection method has become the main means of partial discharge detection. In this method, high-frequency current sensing technology is particularly critical, requiring the sensor to have a wide bandwidth and high sensitivity. Therefore, a high-frequency partial discharge sensor is proposed. Utility Model Content

[0004] In view of the problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the technical problem of low sensitivity in the prior art that this utility model aims to solve is this problem.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-frequency partial discharge sensor, comprising,

[0007] The first measuring component includes a first base, an H-shaped structure located on one side of the first base, a connector located inside the H-shaped structure, and a first half magnet located inside the first base.

[0008] The second measuring component includes a second base connected to the first base, a second half magnet installed inside the second base, and a connecting block installed on one side of the second base;

[0009] A fixing component, including a fixing member, which is mounted on one end of the connecting block.

[0010] In a preferred embodiment of the high-frequency partial discharge sensor described in this utility model, a first pressure plate is installed on the top of the first base, and a first receiving groove is installed at one end of the top of the first base.

[0011] In a preferred embodiment of the high-frequency partial discharge sensor described in this utility model, a first upper cover plate is installed above the first pressure plate.

[0012] In a preferred embodiment of the high-frequency partial discharge sensor described in this utility model, a knob is installed on one side of the first base.

[0013] In a preferred embodiment of the high-frequency partial discharge sensor described in this utility model, one end of the second base is connected to the knob, and a second groove is provided on one side of the top of the second base.

[0014] In a preferred embodiment of the high-frequency partial discharge sensor described in this utility model, a second pressure plate is installed on the top of the second base, and a second upper cover plate is installed on the top of the second pressure plate.

[0015] In a preferred embodiment of the high-frequency partial discharge sensor described in this utility model, one end of the first base is connected to a connecting strap, and one side of the connecting strap is connected to a buckle.

[0016] In a preferred embodiment of the high-frequency partial discharge sensor described in this utility model, the buckle is used in conjunction with the fixing component.

[0017] As a preferred embodiment of the high-frequency partial discharge sensor described in this utility model, the inner walls of the first base and the second base are respectively provided with semi-circular slots.

[0018] In a preferred embodiment of the high-frequency partial discharge sensor described in this utility model, one end of the connector is equipped with a metal pin, and the other end of the connector is equipped with a wiring socket.

[0019] The beneficial effects of this invention are as follows: using high-permeability microcrystalline material as the sensor core improves the detection capability of small current signals, ensuring that partial discharge signals at different frequencies can be effectively detected, thus improving the sensitivity and accuracy of detection. At the same time, the non-invasive detection method eliminates the need for direct electrical connection with the cable under test, allowing partial discharge detection to be performed without power interruption. The device has a compact structure, making it easy to carry and install, effectively expanding its application range. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort. Among them:

[0021] Figure 1 A three-dimensional structural schematic diagram of a high-frequency partial discharge sensor according to an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of a high-frequency partial discharge sensor according to an embodiment of this utility model;

[0023] Figure 3 This is an exploded structural diagram of a high-frequency partial discharge sensor according to one embodiment of the present invention. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0027] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0028] Example 1

[0029] Reference Figure 1 This embodiment provides a high-frequency partial discharge sensor, including,

[0030] The first measuring component 100 includes a first base 101, an H-shaped structure 102 located on one side of the first base 101, a connector 103 located inside the H-shaped structure 102, a metal pin installed at one end of the connector 103 for receiving the generated current, a wiring socket installed at the other end of the connector 103 for connecting other devices to monitor the current generated by this device, a first half magnet 104 located inside the first base 101, a knob 108 installed on one side of the first base 101 for easy installation of a second base 201 and for the second base 201 to rotate around the knob 108, a first pressure plate 105 installed on the top of the first base 101 to fix the first half magnet 104 and prevent it from shaking during use, a first top cover plate 106 installed above the first pressure plate 105, and a first groove 107 installed at one end of the top of the first base 101 to achieve docking and prevent the problem of reverse installation direction.

[0031] Example 2

[0032] Reference Figure 2 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs from the previous embodiment in that it provides a second measuring component 200. The second measuring component 200 works in conjunction with the first measuring component 100 and includes a second base 201. The second base 201 works in conjunction with the first base 101. One end of the second base 201 is connected to a knob 108. A second groove 205 is provided on one side of the top of the second base 201. The second groove 205 mates with the first groove 107, avoiding reverse installation and facilitating installation. Bolts are installed to connect the second base 201 to the first base 101. A second half magnet 202 is installed inside the second base 201. The second half magnet 202 works in conjunction with the first half magnet 104. A second pressure plate 203 is installed on the top of the second base 201 to fix the second half magnet 202 and prevent it from shaking inside the device. A second upper cover plate 206 is installed on the top of the second pressure plate 203 to protect the bottom. A connecting block 204 is installed on one side of the second base 201.

[0033] The present invention has the following working process: In use, the signal conditioner and the signal amplifier are directly connected through the connector 103, and then connected to the measuring device. At the same time, the second measuring component 200 is rotated, and the cable to be measured is placed inside the first measuring component 100. At the same time, the second measuring component 200 is closed. When the cable being measured generates an electrical pulse, a current will be formed in the second half magnet 202 and the first half magnet 104, and then conducted to the measuring device through the connector 103 on one side of the second half magnet 202 and the first half magnet 104.

[0034] Example 3

[0035] Reference Figure 1-2 This is the third embodiment of the present invention. This embodiment is based on the previous embodiment, and differs from the previous embodiment in that: this embodiment provides a high-frequency partial discharge sensor and a water collection well cover mechanism, combining the first and second embodiments.

[0036] The specific fixing component 300 includes a fixing member 301, which is installed at one end of the connecting block 204. One end of the first base 101 is connected to a connecting strap 302. The connecting strap 302 is flexible, making it easy for personnel to remove the buckle 303 and change its position. One side of the connecting strap 302 is connected to a buckle 303, which works in conjunction with the fixing member 301 to fix the first base 101 and the second base 201, preventing separation during monitoring. The inner walls of the first base 101 and the second base 201 are respectively provided with semi-circular slots, which facilitate the placement of the cables to be measured inside. The first half magnet 104 and the second half magnet 202 are made of high-permeability microcrystalline material. The high-permeability microcrystalline material improves the detection capability of small current signals, ensuring that partial discharge signals at different frequencies can be effectively detected, improving the sensitivity and accuracy of detection. At the same time, a non-invasive detection method is adopted.

[0037] The present invention has the following working process: When the measuring cable is placed between the first base 101 and the second base 201, the buckle 303 can be connected to the fixing member 301 to prevent the first base 101 and the second base 201 from opening on their own. At this time, the personnel can take the first base 101 and the second base 201 and move them to the position where the cable needs to be measured, and then monitor the cable. When it is necessary to remove the device, the buckle 303 and the fixing member 301 can be opened. At this time, the second base 201 can be rotated to remove the device from the cable.

[0038] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0039] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to the implementation of the present invention) may be omitted.

[0040] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high frequency partial discharge sensor characterized by: Including, The first measuring component (100) comprises a first base (101), an H-shaped structure (102) on one side of the first base (101), a joint (103) inside the H-shaped structure (102), and a first half magnet (104) inside the first base (101); The second measuring component (200) comprises a second base (201) connected with the first base (101), a second half magnet (202) installed inside the second base (201), and a connecting block (204) installed on one side of the second base (201); The fixing component (300) comprises a fixing member (301) installed at one end of the connecting block (204).

2. The high frequency partial discharge sensor of claim 1, wherein: A first pressing plate (105) is installed on the top of the first base (101), and a first connecting groove (107) is installed at one end of the top of the first base (101).

3. The high frequency partial discharge sensor of claim 2, wherein: A first upper cover plate (106) is installed above the first pressing plate (105).

4. The high frequency partial discharge sensor of claim 3, wherein: A knob (108) is installed on one side of the first base (101).

5. The high frequency partial discharge sensor of claim 4, wherein: One end of the second base (201) is connected with the knob (108), and a second connecting groove (205) is arranged on one side of the top of the second base (201).

6. The high frequency partial discharge sensor of claim 5, wherein: A second pressing plate (203) is installed on the top of the second base (201), and a second upper cover plate (206) is installed on the top of the second pressing plate (203).

7. The high frequency partial discharge sensor of claim 6, wherein: A connecting belt (302) is connected at one end of the first base (101), and a buckle (303) is connected on one side of the connecting belt (302).

8. The high frequency partial discharge sensor of claim 7, wherein: The buckle (303) is used in cooperation with the fixing member (301).

9. The high frequency partial discharge sensor of claim 8, wherein: Half-circular grooves are arranged on the inner walls of the first base (101) and the second base (201), respectively.

10. The high frequency partial discharge sensor of claim 9, wherein: A metal contact pin is installed at one end of the joint (103), and a wire socket is installed at the other end of the joint (103).

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