Switch cabinet partial discharge remote on-line monitoring device

Abstract

The utility model belongs to the technical field of power equipment monitoring, and particularly relates to a switch cabinet partial discharge remote online monitoring device, which comprises an insulating mounting seat, an integrated sensor assembly, a shielding signal transmission assembly and a remote signal interface, the insulating mounting base is of an annular structure, an elastic fixing clamp is arranged on the inner side, and a mounting flange and a grounding terminal are arranged on the outer side. According to the utility model, the problems of low integration level, insufficient electromagnetic shielding, unreliable sensor fixation, easy environmental influence on signal transmission lines and the like existing in traditional switch cabinet partial discharge monitoring are effectively solved. And through integrated design and unified shielding cable transmission, the installation complexity is obviously reduced. The multi-layer shielding structure greatly improves the anti-interference capability and reduces signal distortion. The reliable fixing mode ensures the long-term stable operation of the sensor, and guarantees the detection precision. And the perfect waterproof and environmental protection design reduces the influence of environmental factors on signal transmission.

Description

Technical Field

[0001] This utility model relates to the field of power equipment monitoring technology, specifically a remote online monitoring device for partial discharge of switchgear. Background Technology

[0002] Switchgear is a crucial power distribution device in power systems, and its internal insulation performance directly affects the safety of system operation. Partial discharge is a major cause of insulation aging, and traditional detection methods often rely on offline testing or manual inspections, which cannot provide real-time monitoring of the equipment's status.

[0003] Existing online monitoring devices have the following drawbacks: low integration of sensors and signal processing units, requiring separate wiring, increasing installation complexity, lack of effective electromagnetic shielding structure, and susceptibility to external interference leading to signal distortion. Therefore, it is necessary to develop a remote online monitoring device for partial discharge of switchgear. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0006] A remote online monitoring device for partial discharge in switchgear includes an insulating mounting base, an integrated sensor assembly, a shielded signal transmission assembly, and a remote signal interface;

[0007] The insulating mounting base is a ring structure with an elastic fixing clip on the inner side and a mounting flange and grounding terminal on the outer side.

[0008] The integrated sensor assembly includes three ultrasonic sensors, one ultra-high frequency sensor, and a temperature sensor evenly distributed along the circumference. The ultrasonic sensors are fixedly connected to the mounting base via an insulating connecting rod. The ultra-high frequency sensor is built into the central through hole of the mounting base, and the temperature sensor is embedded on the outside of the mounting base.

[0009] The shielded signal transmission component includes a metal shielding layer covering the sensor signal line and an insulating outer sheath. One end of the metal shielding layer is connected to a grounding terminal, and the other end is connected to a remote signal interface through a waterproof connector.

[0010] The remote signal interface includes an aviation socket and a surge arrester, with the surge arrester connected in parallel between the signal pins of the aviation socket.

[0011] As a preferred embodiment of the remote online monitoring device for partial discharge of switchgear described in this utility model, at least two elastic fixing clips are provided, and they are symmetrically arranged about the insulating mounting base. The inner side of the elastic fixing clip is provided with anti-slip teeth.

[0012] In a preferred embodiment of the remote online monitoring device for partial discharge of switchgear described in this utility model, the insulating connecting rod is provided with a through optical fiber channel.

[0013] As a preferred embodiment of the remote online monitoring device for partial discharge of switchgear described in this utility model, the outer surface of the mounting base is provided with an annular heat dissipation groove, and the temperature sensor is located inside the heat dissipation groove.

[0014] As a preferred embodiment of the remote online monitoring device for partial discharge of switchgear described in this utility model, the metal shielding layer is made of copper braided mesh with a thickness of not less than 0.15mm.

[0015] As a preferred embodiment of the remote online monitoring device for partial discharge of switchgear described in this utility model, the mounting flange is provided with three waist-shaped mounting holes, and the included angle between adjacent mounting holes is 120°.

[0016] The beneficial effects of this invention are: it effectively solves the problems of low integration, insufficient electromagnetic shielding, unreliable sensor fixing, and susceptibility of signal transmission lines to environmental influences in traditional switchgear partial discharge monitoring. Through integrated design and unified shielded cable transmission, installation complexity is significantly reduced. The multi-layer shielding structure greatly improves anti-interference capabilities and reduces signal distortion. Reliable fixing methods ensure long-term stable sensor operation and guarantee detection accuracy. Comprehensive waterproof and environmental protection design reduces the impact of environmental factors on signal transmission. Overall, it reduces the false alarm rate, extends the maintenance cycle, and provides a safe, economical, and efficient condition monitoring solution for power systems, effectively ensuring the stable operation of the system. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. 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 creative effort. Among them:

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the shielded signal transmission component of this utility model;

[0020] Figure 3 This is a schematic diagram of the remote signal interface of the shielded signal transmission component of this utility model. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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 showing 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, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0025] Please see Figures 1-3 The diagram shown is a structural schematic of an embodiment of the remote online monitoring device for partial discharge in a switchgear according to this utility model. Please refer to [link / reference]. Figures 1-3 This paper provides a detailed introduction to a remote online monitoring device for partial discharge in switchgear.

[0026] A remote online monitoring device for partial discharge in switchgear includes an insulating mounting base 100, an integrated sensor assembly 200, a shielded signal transmission assembly 300, and a remote signal interface 400.

[0027] The insulating mounting base 100 has a ring structure, with an elastic fixing clip 101 on the inner side and a mounting flange 102 and a grounding terminal 103 on the outer side.

[0028] The integrated sensor assembly 200 includes three ultrasonic sensors 201, one ultra-high frequency sensor 202, and a temperature sensor 203 evenly distributed along the circumference. The ultrasonic sensors 201 are fixedly connected to the mounting base 100 through an insulating connecting rod 204. The ultra-high frequency sensor 202 is built into the central through hole of the mounting base 100. The temperature sensor 203 is embedded on the outside of the mounting base 100.

[0029] The shielded signal transmission component 300 includes a metal shielding layer 301 that wraps the sensor signal line and an insulating outer sheath 302. One end of the metal shielding layer 301 is connected to the grounding terminal 103, and the other end is connected to the remote signal interface 400 through a waterproof connector 303.

[0030] The remote signal interface 400 includes an aviation socket 401 and a surge arrester 402. The surge arrester 402 is connected in parallel between the signal pins of the aviation socket 401. The remote signal interface 400 also includes a signal conditioning module, which includes an amplification circuit and a filtering circuit. The signal conditioning module is integrated into the remote interface. The amplification circuit boosts the microvolt-level signal to the volt level, and the filtering circuit filters out noise to ensure signal quality.

[0031] Furthermore, at least two elastic fixing clips 101 are provided, symmetrically arranged about the insulating mounting base 100. The inner side of each elastic fixing clip 101 is provided with anti-slip teeth, and the annular structure design of the insulating mounting base 100 facilitates its installation on the switchgear busbar. The elastic fixing clips 101 grip the busbar with pre-tightening force, and the anti-slip teeth 101a increase friction, enabling tool-free and rapid installation.

[0032] Furthermore, the insulating connecting rod 204 has a through-fiber channel inside, which enables optical signal transmission and avoids electromagnetic interference. The ultra-high frequency sensor 202 is built into the central through hole and directly couples to the busbar electric field signal.

[0033] Furthermore, the outer surface of the mounting base 100 is provided with an annular heat dissipation groove 104, and the temperature sensor 203 is located inside the heat dissipation groove 104.

[0034] Furthermore, the metal shielding layer 301 is made of copper braided mesh with a thickness of not less than 0.15 mm, and the metal shielding layer 301 is conducive to suppressing external interference signals.

[0035] Furthermore, the mounting flange 102 is provided with three waist-shaped mounting holes 105, and the included angle between adjacent mounting holes 105 is 120°. The mounting holes 105 of the mounting flange 102 are used for mounting on the switch cabinet.

[0036] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A remote online monitoring device for partial discharge in switchgear, characterized in that, It includes an insulating mounting base (100), an integrated sensor assembly (200), a shielded signal transmission assembly (300), and a remote signal interface (400); The insulating mounting base (100) has a ring structure, with an elastic fixing clip (101) on the inner side and a mounting flange (102) and a grounding terminal (103) on the outer side; The integrated sensor assembly (200) includes three ultrasonic sensors (201) evenly distributed along the circumference, one ultra-high frequency sensor (202) and a temperature sensor (203). The ultrasonic sensors (201) are fixedly connected to the mounting base (100) through an insulating connecting rod (204). The ultra-high frequency sensor (202) is built into the central through hole of the mounting base (100). The temperature sensor (203) is embedded on the outside of the mounting base (100). The shielded signal transmission assembly (300) includes a metal shielding layer (301) covering the sensor signal line and an insulating outer sheath (302). One end of the metal shielding layer (301) is connected to the grounding terminal (103), and the other end is connected to the remote signal interface (400) through a waterproof connector (303). The remote signal interface (400) includes an aviation socket (401) and a surge arrester (402), the surge arrester (402) being connected in parallel between the signal pins of the aviation socket (401).

2. The remote online monitoring device for partial discharge of switchgear according to claim 1, characterized in that: At least two elastic fixing clips (101) are provided and are symmetrically arranged about the insulating mounting base (100). The inner side of the elastic fixing clip (101) is provided with anti-slip teeth.

3. The remote online monitoring device for partial discharge of switchgear according to claim 1, characterized in that: The insulating connecting rod (204) has a through optical fiber channel inside.

4. The remote online monitoring device for partial discharge of switchgear according to claim 1, characterized in that: The mounting base (100) has an annular heat dissipation groove (104) on its outer surface, and the temperature sensor (203) is located inside the heat dissipation groove (104).

5. The remote online monitoring device for partial discharge of switchgear according to claim 1, characterized in that: The metal shielding layer (301) is made of copper braided mesh with a thickness of not less than 0.15 mm.

6. The remote online monitoring device for partial discharge of switchgear according to claim 1, characterized in that: The mounting flange (102) is provided with three waist-shaped mounting holes (105), and the included angle between adjacent mounting holes (105) is 120°.

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