A sensor structure and measurement method for partial discharge measurement in GIS

Abstract

This invention relates to the technical field of power equipment testing, and discloses a sensor structure and measurement method for partial discharge measurement of GIS (Gas Insulator for Geological Components). The sensor structure is used for protruding basin-type insulators of GIS and includes a metal shield, an ultra-high frequency (UHF) sensor, and a telescopic airbag. Two slide rails extend from the metal shield on the basin-type insulator, with limiting portions at the distal ends of the slide rails. First sliders, slidably connected to the slide rails, are located on both sides of the UHF sensor. A second slider is mounted on the telescopic airbag between the first slider and the limiting portions. The telescopic airbag pushes the UHF sensor along the slide rails, causing it to contact the basin-type insulator. Through the semi-enclosed structure of the metal shield on the basin-type insulator, combined with the compression from the telescopic airbag from another direction and the vertical fixation of the guide rails, the UHF sensor can be firmly fixed.

Description

Technical Field

[0001] This invention relates to the technical field of power equipment testing, and in particular to a sensor structure and measurement method for partial discharge measurement in GIS. Background Technology

[0002] GIS (Gas Insulated Switchgear) is sealed with a gaseous medium that has strong insulating properties. Compared with ordinary air insulation, it can significantly shorten the distance between charged parts and save floor space, and therefore it is widely used.

[0003] GIS (Gas Insulated Switchgear) aging is prone to insulation failures, with early manifestations mainly being partial discharge. Partial discharge easily leads to insulation degradation and is a characteristic quantity characterizing the insulation condition. Detecting partial discharge in GIS can identify potential defects early, improving operational reliability. Ultra-high frequency (UHF) methods have become the primary method for detecting partial discharge in GIS due to their high anti-interference and sensitivity. Specifically, UHF methods diagnose partial discharge by detecting the electromagnetic wave signals emitted by nanosecond-level discharge pulses in GIS. The main detection component used in UHF methods for detecting nanosecond-level discharge pulse radiation in GIS is the sensor. Sensors for partial discharge measurement are divided into built-in and external sensors. Built-in sensors inevitably cause distortion of the original electromagnetic field inside the GIS, increasing the risk of partial discharge. Secondly, this built-in structure requires openings in the GIS chamber wall, inevitably increasing the risk of leakage. Therefore, research is gradually shifting towards external sensors.

[0004] Existing technology discloses an external UHF sensor for GIS (Gas Insulation System), publication number CN214895632U. The mounting base of this external UHF sensor includes a connecting seat that connects the mounting plate to the sensor body. The mounting base is equipped with a bidirectional threaded rod, a rotating rod, and other transmission structures. The connecting seat and mounting base are fixed together through the locking and engaging of a locking block and a locking slot. The mounting base remains on the GIS equipment, while the connecting seat is quickly detached along with the sensor body. In this design, the entire structure involves rigid contact, and some parts need to remain on the GIS equipment. Repeated use can easily lead to a loose fit between the sensor and the GIS mounting surface, resulting in gaps and affecting the reception accuracy of the UHF signal.

[0005] Therefore, optimizing the assembly and disassembly structure of external sensors to reduce installation gaps has become an urgent technical problem to be solved. Summary of the Invention

[0006] The technical problem to be solved by this invention is: how to optimize the disassembly and assembly structure of external sensors to reduce installation gaps.

[0007] To address the aforementioned technical problems, this invention provides a sensor structure and measurement method for partial discharge measurement in GIS.

[0008] In a first aspect, the present invention provides a sensor structure for measuring partial discharge in GIS (Gas Insulator for Geological Survey). The sensor structure is used for a protruding basin-type insulator in GIS. The sensor structure includes: a metal shielding cover, the metal shielding cover having an open bottom surface and open side surfaces, the metal shielding cover being disposed on the basin-type insulator, two slide rails extending from both sides of the open side surfaces away from the open side surfaces, and a limiting part being provided at one end of the slide rails away from the open side surfaces; an ultra-high frequency (UHF) sensor, the UHF sensor having first sliders on both sides, the first sliders being slidably connected to the slide rails; and a telescopic airbag, the telescopic airbag having a second slider, the second slider being slidably connected to the slide rails, and the second slider being installed between the first sliders and the limiting part. The telescopic airbag is used to push the UHF sensor to slide along the slide rails, so that the UHF sensor abuts against the basin-type insulator.

[0009] In one embodiment, the basin-type insulator includes an insulator body and a gate conductor, the gate conductor spanning across the insulator body and spaced apart from the insulator body, and a metal shield covering the insulator body; the sensor structure also includes two U-shaped metal covers, the two U-shaped metal covers respectively wrapping the two columns of the gate conductor, and the two U-shaped metal covers are detachably connected to the metal shield.

[0010] In one embodiment, the metal shielding cover is provided with a vertical groove, and the U-shaped metal cover is provided with a folded edge. The folded edge faces in the opposite direction to the vertical groove. The folded edge is inserted into the vertical groove to fix the U-shaped metal cover on the metal shielding cover.

[0011] In one embodiment, the height of the U-shaped metal cover is greater than or equal to the height of the ultra-high frequency sensor, and the position of the U-shaped metal cover in the height direction corresponds to that of the ultra-high frequency sensor.

[0012] In one embodiment, the first slider and the ultra-high frequency sensor are detachably connected, and the second slider and the telescopic airbag are detachably connected.

[0013] In one embodiment, the base of the telescopic airbag is provided with a through hole, and a sliding shaft is slidably inserted into the through hole. The two second sliders are the two ends of the sliding shaft extending out of the through hole.

[0014] In one embodiment, the telescopic airbag is a manual airbag, which includes an airbag body, a pressure relief valve, and a spherical airbag. A second slider is disposed on the airbag body, and the manual airbag is connected to the airbag body. The pressure relief valve is disposed on the airbag body or on the passage between the spherical airbag and the airbag body.

[0015] In one embodiment, the metal shield is a sheet metal part, and the slide rail is a strip-shaped hole stamped on the sheet metal part.

[0016] In one embodiment, the telescopic airbag is equipped with a safety valve.

[0017] A second aspect of the present invention provides a measurement method for partial discharge measurement in GIS, the measurement method being used in the sensor structure provided in the first aspect of the present invention, the measurement method comprising: S1, placing a metal shielding cover on a basin-type insulator; S2, assembling an ultra-high frequency sensor and a telescopic airbag on a slide rail of the metal shielding cover; S3, inflating the telescopic airbag to push the ultra-high frequency sensor against the basin-type insulator; and S4, acquiring and analyzing data from the ultra-high frequency sensor.

[0018] Compared with existing technologies, the sensor structure and measurement method for partial discharge measurement in GIS according to embodiments of the present invention have the following advantages: Compared with multi-faceted disassembly and assembly structures, the present invention uses a semi-enclosed metal shielding cover to cover the basin-type insulator, eliminating the need for multi-directional limiting and fixing structures, retaining only the slide rail and slider as moving parts, and using a telescopic airbag as a power component, which only requires controlling the inflation and deflation of air, without the need to tighten bolts or complex gear reversing mechanisms. Not only is disassembly and assembly convenient, but due to the characteristics of the telescopic airbag, the UHF sensor is always subjected to thrust. Even if repeated disassembly and assembly causes slight deformation of the metal shielding cover, the UHF sensor and the basin-type insulator can always maintain a small installation gap, making it difficult to have the gap problem caused by rigid fit in existing technologies, and the measurement accuracy is more stable and accurate. Attached Figure Description

[0019] Figure 1 This is an assembly schematic diagram of a sensor structure for partial discharge measurement in GIS, as exemplarily shown in an embodiment of the present invention.

[0020] Figure 2 This is an exploded view of a sensor structure for partial discharge measurement in GIS, as exemplarily shown in an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of a metal shielding cover for a sensor structure used in GIS partial discharge measurement, as exemplarily shown in an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of a disc insulator suitable for a sensor structure used in GIS partial discharge measurement, as exemplarily shown in an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of a sensor structure equipped with a U-shaped metal cover, as exemplarily shown in an embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the structure of a U-shaped metal cover for a sensor structure used in GIS partial discharge measurement, as exemplarily shown in an embodiment of the present invention.

[0025] Figure 7This is a schematic diagram of the structure of an ultra-high frequency sensor for partial discharge measurement in GIS, as exemplarily shown in an embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram of the structure of a telescopic airbag for measuring partial discharge in GIS, as exemplarily shown in an embodiment of the present invention.

[0027] Figure 9 This is a schematic diagram of a manual airbag structure for a sensor structure used in GIS partial discharge measurement, as exemplarily shown in an embodiment of the present invention.

[0028] Figure 10 This is a schematic flowchart illustrating a measurement method for partial discharge measurement in GIS, as exemplarily shown in an embodiment of the present invention.

[0029] Figure label: 1. Sensor structure; 2. Basin-type insulator; 11. Metal shield; 12. Ultra-high frequency sensor; 13. Telescopic airbag; 14. U-shaped metal cover; 21. Insulator body; 22. Gate-type conductor; 111. Open bottom surface; 112. Open side surface; 113. Slide rail; 114. Vertical slide groove; 115. Clearance groove; 121. First slider; 122. Blind hole; 131. Through hole; 132. Sliding shaft; 133. Airbag body; 134. Pressure relief valve; 135. Spherical airbag; 141. Folded edge; 221. Column; 1131. Limiting part; 1321. Second slider. Detailed Implementation

[0030] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0031] It should be understood that although the terms first, second, third, etc., may be used in this invention to describe various sliders, these sliders should not be limited to these terms. These terms are only used to distinguish sliders of the same type from each other. For example, a first slider may also be referred to as a second slider without departing from the scope of this invention, and similarly, a second slider may also be referred to as a first slider. Depending on the context, the word "if" as used herein can be interpreted as "when," "when," or "in response to determination."

[0032] For ease of understanding, the three-dimensional directions are labeled in any of the accompanying drawings of this invention, and the same label in different drawings represents the same direction. For example, the X direction points to the direction of the open side 112, which is also the direction of extension of the slide rail 113 and the direction of contraction of the telescopic airbag 13; the opposite direction of X points to the direction of extension of the telescopic airbag 13; the Y direction points to the width direction of the metal shield 11; the Z direction points to the top; the opposite direction of the Z direction points to the direction of the open bottom surface 111, which also points to the GIS equipment body.

[0033] Compared to ordinary air insulation, GIS (Gas Insulated Switchgear) is sealed with a gaseous medium with strong insulating properties, which greatly shortens the distance between charged parts and saves floor space. As a result, GIS has been widely used.

[0034] As GIS ages, it is prone to insulation failures, with partial discharge being the primary early symptom. Detecting partial discharge allows for early detection of the problem. Ultra-high frequency (UHF) methods, with their excellent anti-interference capabilities and sensitivity, have become the mainstream approach. Their principle is to diagnose partial discharge by detecting the electromagnetic wave signals radiated by nanosecond-level discharge pulses within the GIS.

[0035] Sensors that capture this electromagnetic wave signal are divided into two categories: built-in and external. The mainstream built-in type requires openings in the GIS gas chamber wall, which increases the risk of gas leakage. Therefore, current research is gradually moving towards external types. In the existing patent with publication number CN214895632U, multiple transmission components such as bushings, limiting rods, bidirectional threaded rods, limiting blocks, driven gears, movable threaded sleeves, moving rods, sliding rods, rotating rods, drive gears, return springs, locking blocks, locking slots, and sliding grooves are used to realize the assembly and disassembly of the sensor, making the structure extremely complex. In these structures, the mounting base of the external GIS UHF sensor has a connecting seat inside, which connects the mounting plate and the sensor body. The mounting base is equipped with bidirectional threaded rods, rotating rods, and other transmission structures. Through the locking and engaging of locking blocks and locking slots, the connecting seat and the mounting base are fixed. The mounting base remains on the GIS equipment, while the connecting seat is quickly disassembled along with the sensor body. In this scheme, the entire structure is in rigid contact, and some parts of the structure need to remain on the GIS equipment. After repeated use, the sensor may not fit tightly with the GIS mounting surface, resulting in gaps and affecting the reception accuracy of UHF signals.

[0036] Therefore, the present invention aims to optimize the disassembly and assembly structure of external sensors and reduce installation gaps caused by repeated use.

[0037] like Figure 1 Assembly drawings and Figure 2As shown in the exploded view, a preferred embodiment of the present invention provides a sensor structure 1 for partial discharge measurement of GIS. The sensor structure 1 is used for the protruding basin-type insulator 2 of GIS. The sensor structure 1 includes a metal shield 11, an ultra-high frequency sensor 12, and a telescopic airbag 13.

[0038] The metal shield 11 includes an open bottom surface 111 and an open side surface 112. The metal shield 11 is placed on the basin insulator 2. Two slide rails 113 extend from both sides of the open side surface 112 away from the open side surface 112. A limiting part 1131 is provided at the end of the slide rail 113 away from the open side surface 112.

[0039] The ultra-high frequency sensor 12 has a first slider 121 on both sides, and the first slider 121 is slidably connected to the slide rail 113.

[0040] The telescopic airbag 13 is provided with a second slider 1321, which is slidably connected to the slide rail 113. The second slider 1321 is installed between the first slider 121 and the limiting part 1131. The telescopic airbag 13 is used to push the ultra-high frequency sensor 12 to slide along the slide rail 113, so that the ultra-high frequency sensor 12 abuts against the basin insulator 2.

[0041] This invention does not limit the specific dimensions of the metal shield 11. It is understood that the metal shield 11 in this invention is designed to limit the movement of the ultra-high frequency sensor 12, fixing it to the basin-type insulator 2. Therefore, the size of the metal shield 11 is slightly larger than that of the basin-type insulator 2, and as close as possible to the size of the basin-type insulator 2 to reduce swaying. This adaptive dimensional modification is a conventional method; therefore, the size of the metal shield 11 does not limit the scope of protection of this invention, and any dimensional changes made based on this should also fall within the scope of protection of this invention.

[0042] The semi-enclosed metal shield 11 has two open sides, namely the open bottom surface 111 and the open side surface 112. The open bottom surface 111 is used to cover the basin insulator 2, while the open side surface 112 is used for the UHF sensor 12 to approach and measure. Through the semi-enclosed structure of the metal shield 11 on the basin insulator 2, combined with the compression from the telescopic airbag 13 from the other direction, the UHF sensor 12 can be firmly and horizontally fixed. Due to the characteristics of the telescopic airbag, the UHF sensor is always subjected to thrust. Even if the metal shield is slightly deformed due to repeated disassembly and reassembly, a small installation gap can always be maintained between the UHF sensor and the basin insulator, and the gap problem caused by the rigid fit in the prior art is unlikely to occur.

[0043] Since the slide rail 113 vertically fixes the first slider 121 of the UHF sensor 12, and the slide rail 113 is located on the metal shield 11, the UHF sensor 12 is also restricted in the vertical direction. Therefore, the UHF sensor 12 is fully fixed. Such a full fixation is only applicable to the telescopic airbag 13 power component. There is no complicated gear reversal or transmission structure. The structure is simple and easy to disassemble and assemble.

[0044] Moreover, due to the characteristics of its metal material, the metal shield 11 can significantly reduce the leakage of electromagnetic wave signals from the basin insulator 2 while surrounding it.

[0045] It is understood that what is shown is the protruding part of the basin insulator 2, and not the complete structure of the basin insulator 2. In order to simplify the description and facilitate understanding of the scheme, the protruding part is referred to as basin insulator 2 in this invention, and the structure of other parts of basin insulator 2 is not limited.

[0046] In some GIS equipment with such a prominent structure, this part is usually the location where two electrical components are insulated and isolated, and the two electrical components need to share the same ground, such as... Figure 4 As shown, a basin-type insulator 2 may include an insulator body 21 and a portal wire 22. The portal wire 22 is straddling the insulator body 21 and is spaced apart from the insulator body 21. It is understood that the portal wire 22 is used to conduct a specified structure of two electrical components (such as a grounding component), and its surface has insulating properties.

[0047] In this structure, the insulator body 21 serves as the object to be measured, and therefore the metal shield 11 is placed over the insulator body 21. However, when current flows through the portal wire 22, electromagnetic waves are generated due to the principle of electromagnetic induction. These electromagnetic waves are obviously not the signals that need to be measured. Since the metal shield 11 is fixed on the insulator body 21, it does not provide adequate protection for the surrounding portal wire 22, which will affect the measurement accuracy of the ultra-high frequency sensor 12.

[0048] To solve this technical problem, in one embodiment of the present invention, as follows: Figure 5 As shown, the metal shield 11 is mounted on the insulator body 21; the sensor structure 1 also includes two U-shaped metal covers 14, which respectively wrap around the two columns 221 of the gate conductor 22, and the two U-shaped metal covers 14 are detachably connected to the metal shield 11.

[0049] By setting up a U-shaped metal cover 14, the metal shield 11 can be used to wrap around the gate-type conductor 22, reducing its magnetic field leakage and improving the accuracy of the measurement.

[0050] Furthermore, the presence of the two U-shaped metal covers 14 fixes the Y direction and the opposite direction of Y. Even if the metal shielding cover 11 is not dimensionally accurate due to wear during production or use, and wobbles in the Y direction, the two U-shaped metal covers 14 can still play a fixing role, reducing assembly abnormalities caused by gaps, and making the metal shielding cover 11 of the present invention more applicable.

[0051] The connection between the U-shaped metal cover 14 and the metal shield 11 can adopt a conventional structure such as screw connection.

[0052] In embodiments of the present invention, such as Figure 6 As shown in the enlarged view, the metal shield 11 is provided with a vertical groove 114, and the U-shaped metal cover 14 is provided with a folded edge 141. The orientation of the folded edge 141 is opposite to the orientation of the vertical groove 114. The folded edge 141 is inserted into the vertical groove 114 to fix the U-shaped metal cover 14 on the metal shield 11.

[0053] With this folded edge 141 structural design, combined with the characteristics of the column 221 structure of the portal wire 22, assembly can be quickly achieved simply by sliding up and down. Compared with screw connection, this sliding connection reduces the use of at least four screws, thus reducing installation and disassembly time.

[0054] It is understandable that the vertical groove 114 can be either an additional structure fixed to the metal shield 11, or it can be obtained by cutting and bending the side metal sheet of the metal shield 11. That is, the vertical groove 114 can be obtained by deforming a part of the structure of the metal shield 11. The cutting and deformation of the metal shield 11 will create a hollow in the original part. However, since the U-shaped metal cover 14 has a folded edge 141, the hollow at the vertical groove 114 will be blocked by the folded edge 141. Therefore, there is no need to worry about the leakage of electromagnetic signals in the insulator body 21.

[0055] To achieve better metal shielding, the height of the U-shaped metal cover 14 can be greater than the height of the vertical groove 114, in order to reduce the generation of perforated gaps.

[0056] Furthermore, since the U-shaped metal cover is intended to reduce the influence of the electromagnetic induction signal of the gate wire 22 on the ultra-high frequency sensor 12, in one embodiment of the present invention, the height of the U-shaped metal cover 14 is greater than or equal to the height of the ultra-high frequency sensor 12, and the U-shaped metal cover 14 corresponds to the position of the ultra-high frequency sensor 12 in the height direction.

[0057] By matching the position and size, there is no need to use a long U-shaped metal cover 14. Only the main affected parts need to be covered, which reduces the use of materials, lowers the production cost, and is conducive to promoting the sensor structure 1 of the present invention.

[0058] Furthermore, it is understood that in this invention, since the top surface of the metal shield 11 is closed, the ultra-high frequency sensor 12 can be shielded simply by adjusting the length of the top surface in the X direction, thereby reducing the influence of the transverse portion of the gate wire 22 in the Y direction on the measurement.

[0059] Of course, based on other considerations, in other embodiments, a groove can also be provided on the top surface of the metal shield 11, and a corresponding U-shaped metal cover 14 can be assembled to form an all-round electromagnetic shield for the gate-type conductor 22.

[0060] Some GIS basin-type insulators 2 have a boss structure on the protruding part, such as Figure 3 As shown, in this embodiment of the invention, a clearance groove 115 can be provided on the metal shield 11, and the position of the clearance groove 115 corresponds to the position of the boss structure of the basin insulator 2.

[0061] It is understandable that in this invention, the metal shielding cover 11 needs to be installed before the first slider 121 and the second slider 1321 are installed on the slide rail 113. Since the spacing of the slide rail 113 is fixed, a corresponding disassembly and assembly structure needs to be designed.

[0062] Since the main structure of the metal shield 11 is usually a thin metal plate, in some cost-effective solutions, no other additional structure is needed. When installing the first slider 121 and the second slider 1321, the two slide rails 113 can be directly pried open, and after the first slider 121 and the second slider 1321 are inserted, the slide rails 113 will return to their original position due to their own elasticity. At this time, inflating the telescopic airbag 13 can fix the UHF sensor 12. During disassembly, after deflating the telescopic airbag 13, the first slider 121 and the second slider 1321 can be directly removed by prying open the two slide rails 113.

[0063] While this method of utilizing the material's own deformation is convenient and quick, after repeated bending over a long period of time, the slide rail 113 is prone to metal fatigue, which can cause the slide rail 113 to fail to fully reset, resulting in the first slider 121 or the second slider 1321 coming off.

[0064] To reduce the occurrence of this situation, in one embodiment of the present invention, the first slider 121 and the ultra-high frequency sensor 12 are detachably connected, and the second slider 1321 and the telescopic airbag 13 are detachably connected.

[0065] By making the first slider 121 and the second slider 1321 detachable, the slide rail 113 can be bent or even removed during installation and disassembly, thus reducing the possibility of metal fatigue.

[0066] Specifically, such as Figure 7As shown, in an exemplary disassembly and assembly structure, a blind hole 122 can be provided on the sensor body, and a first slider 121 is provided on the protrusion that cooperates with the blind hole 122, thereby realizing the detachable connection between the first slider 121 and the ultra-high frequency sensor 12.

[0067] Furthermore, the present invention also provides a disassembly structure for the second slider 1321 of the telescopic airbag 13, specifically, as follows: Figure 8 In one embodiment, the base of the telescopic airbag 13 is provided with a through hole 131, a sliding shaft 132 is slidably inserted into the through hole 131, and two second sliders 1321 are the two ends of the sliding shaft 132 extending out of the through hole 131.

[0068] This structure enables the two sliders to be integrally formed, allowing for simultaneous assembly and disassembly, thus increasing the convenience of assembly and disassembly, and also reducing fatigue deformation of the metal shield 11.

[0069] Furthermore, in a further embodiment, an anti-slip coating or anti-slip texture may be provided between the sliding shaft 132 and the through hole 131 to increase the reliability of the assembly and reduce the risk of the sliding shaft 132 coming off by itself.

[0070] In this invention, the telescopic airbag 13 can be inflated or deflated by any inflation / deflation device, such as an electric air pump, which inflates when rotating in the forward direction and deflates when rotating in the reverse direction, thereby achieving the extension and retraction of the telescopic airbag 13.

[0071] However, for GIS equipment, external power supply inevitably creates other circuits, and wherever there is a circuit, an electromagnetic field will inevitably be generated. Therefore, in one embodiment of the present invention, in order to reduce the impact on the ultra-high frequency sensor 12, such as... Figure 2 and Figure 9 As shown, the telescopic airbag 13 can be a manual airbag. The manual airbag includes an airbag body 133, a pressure relief valve 134, and a spherical airbag 135. The second slider 1321 is provided on the airbag body 133. The manual airbag is connected to the airbag body 133. The pressure relief valve 134 is provided on the airbag body 133 or in the passage between the spherical airbag 135 and the airbag body 133.

[0072] Since the manual airbag does not contain any circuitry, it will not affect the measurement results. The manual airbag is equipped with a one-way valve (not shown in the figure), which can continuously squeeze to supply air to the telescopic airbag 13. When it needs to be removed, the pressure relief valve 134 can be manually opened to release the air.

[0073] It is understood that the present invention does not impose specific limitations on the size and style of the manual airbag, and the size and style in the accompanying drawings are merely exemplary. Depending on different design requirements, manual airbags of various sizes and styles can be used.

[0074] In this invention, "manual airbag" refers to any kind of manually supplied air device, which can refer to either squeezing the airbag by hand or stepping on the airbag by foot, both of which fall within the protection scope of this invention.

[0075] In any of the above embodiments, the metal shield 11 can be a sheet metal part, and the slide rail 113 is a strip hole stamped on the sheet metal part.

[0076] Based on the description of any of the above embodiments of the present invention, it can be understood that the function and shape of the metal shielding cover 11 can be achieved by using a sheet metal structure. Using a sheet metal structure can shorten the processing time, effectively reduce the production cost of the sensor structure 1, and help the production and promotion of actual products.

[0077] Since the slide rail 113 is a sliding component, it has low precision requirements, so it can also be directly manufactured by stamping, which further reduces production costs.

[0078] Furthermore, in practical applications, the telescopic airbag 13 may be over-pressurized due to improper operation. In order to reduce mechanical damage to the ultra-high frequency sensor 12 or the insulator body 21, in one embodiment of the present invention, a safety valve may be provided on the telescopic airbag 13.

[0079] The safety valve will automatically release pressure when the pressure exceeds the set pressure. The set pressure is determined by the physical structure of the safety valve. Different insulator structures and different UHF sensors 12 have different pressure-bearing capacities. Therefore, the selection of the safety valve also depends on the actual needs.

[0080] Accordingly, the present invention also provides a measurement method for partial discharge measurement in GIS, such as... Figure 10 As shown, the measurement method is used in sensor structure 1 of any embodiment of the present invention, and the measurement method includes: S1. Cover the basin-type insulator 2 with the metal shield 11.

[0081] S2. Assemble the ultra-high frequency sensor 12 and the telescopic airbag 13 on the slide rail 113 of the metal shield 11.

[0082] S3. Inflate the telescopic airbag 13 so that the telescopic airbag 13 pushes the ultra-high frequency sensor 12 against the basin insulator 2.

[0083] S4. Acquire and parse the data from the UHF sensor 12.

[0084] For details on acquiring and parsing the data from the UHF sensor 12, please refer to the existing technical solutions; this invention will not elaborate further.

[0085] It is understood that the measurement method of the present invention includes all the technical features of the sensor structure of this application. Any embodiment, combination of embodiments, and extension of the sensor structure in the present invention are applicable to the measurement method of the present invention. Correspondingly, the beneficial effects of any embodiment, combination of embodiments, and extension of the sensor structure in the present invention are also applicable to the measurement method of the present invention. Since the sensor structure part of the present invention has been described in detail, it will not be repeated here.

[0086] This invention discloses a sensor structure 1 and a measurement method for partial discharge measurement in GIS. Its core lies in achieving efficient and safe sealing and flexible cooperation by optimizing the layout and disassembly structure of the metal shield 11 and the ultra-high frequency sensor 12.

[0087] Specifically, the metal shield 11 adopts a semi-enclosed structure, and the horizontal fixation of the basin insulator 2 is achieved through the sliding connection between the slide rail 113 and the slider, while reducing electromagnetic signal leakage and improving measurement accuracy.

[0088] The slide rail 113 is manufactured using sheet metal stamping technology, which ensures structural stability and reduces production costs. The assembly and disassembly of the telescopic airbag 13 are achieved by the slide rail 113 and the slider sliding up and down, avoiding metal fatigue problems caused by traditional connection methods such as screws.

[0089] In addition, the connection between the U-shaped metal cover 14 and the metal shield 11 adopts a conventional screw structure, but the disassembly and assembly process is simplified by a sliding connection, which further reduces the assembly complexity.

[0090] The telescopic airbag 13 can be manually inflated and deflated without an external power source, and is equipped with a safety valve to handle pressure changes and ensure the reliability of measurement data. The overall structure balances sealing, ease of assembly and disassembly, and cost optimization, providing an innovative solution for the efficient operation of GIS equipment.

[0091] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A sensor structure for partial discharge measurement in GIS, characterized in that, The sensor structure (1) is used for the GIS protruding basin insulator (2), and the sensor structure (1) includes: A metal shield (11) is provided, which includes an open bottom surface (111) and an open side surface (112). The metal shield (11) is installed on the basin insulator (2). Two slide rails (113) extend from both sides of the open side surface (112) away from the open side surface (112). A limiting part (1131) is provided at one end of the slide rail (113) away from the open side surface (112). An ultra-high frequency sensor (12) is provided with first sliders (121) on both sides of the ultra-high frequency sensor (12), and the first sliders (121) are slidably connected to the slide rail (113); A telescopic airbag (13) is provided with a second slider (1321). The second slider (1321) is slidably connected to the slide rail (113), and the second slider (1321) is installed between the first slider (121) and the limiting part (1131). The telescopic airbag (13) is used to push the ultra-high frequency sensor (12) to slide along the slide rail (113) so that the ultra-high frequency sensor (12) abuts against the basin insulator (2).

2. The sensor structure according to claim 1, characterized in that, The basin-type insulator (2) includes an insulator body (21) and a gate conductor (22). The gate conductor (22) spans across the insulator body (21) and is spaced apart from the insulator body (21). The metal shield (11) covers the insulator body (21). The sensor structure (1) also includes two U-shaped metal covers (14). The two U-shaped metal covers (14) respectively wrap around the two columns (221) of the gate conductor (22), and the two U-shaped metal covers (14) are detachably connected to the metal shield (11).

3. The sensor structure according to claim 2, characterized in that, The metal shield (11) is provided with a vertical groove (114), and the U-shaped metal cover (14) is provided with a folded edge (141). The orientation of the folded edge (141) is opposite to that of the vertical groove (114). The folded edge (141) is inserted into the vertical groove (114) to fix the U-shaped metal cover (14) on the metal shield (11).

4. The sensor structure according to claim 2, characterized in that, The height of the U-shaped metal cover (14) is greater than or equal to the height of the ultra-high frequency sensor (12), and the position of the U-shaped metal cover (14) corresponds to that of the ultra-high frequency sensor (12) in the height direction.

5. The sensor structure according to claim 1, characterized in that, The first slider (121) and the ultra-high frequency sensor (12) are detachably connected, and the second slider (1321) and the telescopic airbag (13) are detachably connected.

6. The sensor structure according to claim 5, characterized in that, The base of the telescopic airbag (13) is provided with a through hole (131), and a sliding shaft (132) is slidably inserted into the through hole (131). The two second sliders (1321) are the two ends of the sliding shaft (132) extending from the through hole (131).

7. The sensor structure according to claim 1, characterized in that, The telescopic airbag (13) is a manual airbag, which includes an airbag body (133), a pressure relief valve (134), and a spherical airbag (135). The second slider (1321) is located on the airbag body (133). The manual airbag is connected to the airbag body (133). The pressure relief valve (134) is located on the airbag body (133) or in the passage between the spherical airbag (135) and the airbag body (133).

8. The sensor structure according to claim 1, characterized in that, The metal shield (11) is a sheet metal part, and the slide rail (113) is a strip hole stamped on the sheet metal part.

9. The sensor structure according to claim 1, characterized in that, The telescopic airbag (13) is equipped with a safety valve.

10. A measurement method for partial discharge measurement in GIS, characterized in that, The measurement method is used in the sensor structure (1) as described in any one of claims 1-9, and the measurement method includes: S1. Place the metal shield (11) over the basin insulator (2); S2. Assemble the ultra-high frequency sensor (12) and the telescopic airbag (13) on the slide rail (113) of the metal shield (11); S3. Inflate the telescopic airbag (13) so that the telescopic airbag (13) pushes the ultra-high frequency sensor (12) against the basin insulator (2); S4. Acquire and parse the data from the ultra-high frequency sensor (12).

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