Ultrahigh frequency partial discharge detection device for GIS equipment
By setting up physical isolation plates and sealing structures in the UHF partial discharge detection device, the problem of noise interference between low-frequency signals and UHF signals is solved, improving the accuracy of the signal and the device's waterproof and dustproof capabilities.
Patent Information
- Application Number
- CN202522309506.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-10-31
AI Technical Summary
Existing UHF partial discharge detection devices are easily affected by noise interference from low-frequency signals during use, causing signal waveform distortion and affecting the detection accuracy of UHF signals.
The isolator employs a physical isolation plate and power supply components. It is physically isolated by setting different partitions of the UHF signal processing board in the physical isolator. The isolation is achieved by setting the isolation grooves in the physical isolation plate and sealing it with silicone sealing rings and potting compound.
It effectively reduces interference between UHF signal processing boards, avoids noise interference from low-frequency signals to UHF signals, and improves signal accuracy and the waterproof and dustproof rating of the detection device.
Smart Images
Figure CN223637645U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to discharge detection technical field especially relates to a kind of UHF partial discharge detection device for GIS equipment. BACKGROUND
[0002] GIS equipment is also called gas insulated metal-enclosed switchgear, which is characterized by all or part of special gas (usually sulfur hexafluoride) as insulation medium to replace air at normal pressure. This type of equipment is widely used in high-voltage, ultra-high voltage and extra-high voltage power transmission and transformation occasions due to its compact structure, high reliability and long maintenance interval.
[0003] During the operation of GIS equipment, partial discharge is the main cause of insulation failure, so it is necessary to effectively monitor the internal discharge activity during operation. One of the commonly used detection methods is UHF measurement method, which is achieved by installing a UHF partial discharge detection device on the outside of the flange of the GIS equipment basin-type insulator.
[0004] However, the existing UHF partial discharge detection device has a poor internal structure design, and when in use, the UHF signal is disturbed by noise from the low-frequency signal, causing signal waveform distortion. In view of this, the applicant believes that it is necessary to improve the internal structure of the existing UHF partial discharge detection device to avoid the above noise interference problem. SUMMARY
[0005] The technical problem to be solved by the utility model is how to improve the internal structure of the existing UHF partial discharge detection device to minimize or completely avoid the noise interference problem caused by the low-frequency signal inside the detection device to the UHF signal.
[0006] The technical solution adopted by the utility model to solve its technical problem is to provide a UHF partial discharge detection device for GIS equipment, which comprises:
[0007] A housing is divided into a lower accommodating cavity and an upper accommodating cavity inside the housing;
[0008] A UHF PCB antenna is arranged in the lower accommodating cavity;
[0009] A power supply assembly is arranged in the upper accommodating cavity;
[0010] A signal processing PCB board is arranged in the upper accommodating cavity, which comprises a UHF signal processing board and a low-frequency communication board;
[0011] The upper accommodating cavity is further provided with a physical isolation plate, and the surface of the physical isolation plate is provided with an isolation groove matched with different partitions of the UHF signal processing plate.
[0012] Further, the low-frequency communication plate and the UHF signal processing plate are arranged in parallel and one above the other in the upper accommodating cavity.
[0013] Further, the UHF signal processing plate and the low-frequency communication plate are connected as a whole, and the element surfaces of the two are arranged away from each other.
[0014] Further, the UHF signal processing plate comprises an ultrasonic wave processing area and a UHF processing area.
[0015] Further, the ultrasonic wave processing area comprises an ultrasonic wave signal processing area and an ultrasonic wave preamplification area; the isolation groove comprises a first isolation groove and a second isolation groove, which are respectively used for accommodating the ultrasonic wave signal processing area and the ultrasonic wave preamplification area.
[0016] The UHF processing area comprises a logarithmic detection area, an intermediate frequency filtering area, a local oscillator area, and a preamplification and mixing processing area; the isolation groove further comprises a third isolation groove, a fourth isolation groove, a fifth isolation groove, and a sixth isolation groove, which are respectively used for accommodating the logarithmic detection area, the intermediate frequency filtering area, the local oscillator area, and the preamplification and mixing processing area.
[0017] Further, the shell comprises a shell bottom box and a shell cover plate.
[0018] The shell bottom box is provided with a transverse partition plate, which divides the inner cavity of the shell bottom box into the lower accommodating cavity and the upper accommodating cavity.
[0019] The shell cover plate is closed and combined on the upper accommodating cavity of the shell bottom box, and the shell cover plate and the shell bottom box are separable.
[0020] Further, the physical isolation plate is arranged on the upper surface of the transverse partition plate, the isolation groove is arranged on the upper surface of the physical isolation plate, and the physical isolation plate is made of aluminum alloy material.
[0021] Further, the upper accommodating cavity is provided with a vertical partition plate, which divides the upper accommodating cavity into a left upper accommodating cavity and a right upper accommodating cavity; the power supply assembly is arranged in the left upper accommodating cavity, and the signal processing PCB plate is arranged in the right upper accommodating cavity.
[0022] Further, the shell cover plate and the shell bottom box are sealed by a silica gel sealing ring.
[0023] Further, the bottom of the lower accommodating cavity is waterproofly sealed by pouring sealant.
[0024] The utility model discloses beneficial effect lies in:
[0025] (1) by setting up the physical isolation board, and let the each partition of ultra high frequency signal processing board is inserted into the different isolation recesses of physical isolation board respectively, can effectively isolate the different partitions of ultra high frequency signal processing board respectively, prevents the interference problem between the different partitions of ultra high frequency signal processing board, and avoids the noise interference problem of low frequency signal to ultra high frequency signal.
[0026] (2) the shell cover plate and the shell bottom box are sealed by a silica gel sealing ring, and the bottom of the lower accommodating cavity is waterproofly sealed by pouring sealant, which can ensure that the ultra high frequency partial discharge detection device has a high waterproof and dustproof level to adapt to outdoor weather changes. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 is the appearance structure diagram of the ultra high frequency partial discharge detection device for GIS equipment provided by the utility model;
[0028] Figure 2 is Figure 1 the exploded view of
[0029] Figure 3 is the display diagram when the signal processing PCB board is separated from the upper accommodating cavity in the utility model;
[0030] Figure 4 is the independent view of the signal processing PCB board in the utility model;
[0031] Figure 5 is Figure 1 the longitudinal section view of DETAILED DESCRIPTION
[0032] The utility model will be further introduced in detail in combination with specific embodiment, but the implementation mode of the utility model is not limited to this.
[0033] Referring to Figures 1 to 5 , the utility model provides a kind of ultra high frequency partial discharge detection device for GIS equipment, it includes: shell 100, ultra high frequency PCB antenna 200, power supply component 300, signal processing PCB board 400.
[0034] Referring to Figure 5 , the shell 100 is formed with lower accommodating cavity 1a and upper accommodating cavity 1b in division.
[0035] Referring toFigure 5 The UHF PCB antenna 200 is arranged in the lower accommodating cavity 1a.
[0036] Referring to Figure 2 , Figure 3 and Figure 5 , the power supply assembly 300 is arranged in the upper accommodating cavity 1b.
[0037] Referring to Figure 2 , Figure 3 and Figure 5 , the signal processing PCB board 400 is arranged in the upper accommodating cavity 1b. Referring to Figure 3 , the signal processing PCB board 400 comprises a UHF signal processing board 410 and a low-frequency communication board 420.
[0038] In the upper accommodating cavity 1b, a physical isolation plate 500 is further arranged, referring to Figure 3 , the surface of the physical isolation plate 500 is provided with isolation grooves matched with different partitions of the UHF signal processing board 410, the UHF signal processing board 410 is buckled on the physical isolation plate 500, and different partitions are respectively placed in different isolation grooves.
[0039] In a preferred embodiment, referring to Figure 3 , the low-frequency communication board 420 and the UHF signal processing board 410 are arranged in parallel and one above the other in the upper accommodating cavity 1b. In this arrangement, the low-frequency communication board 420 and the UHF signal processing board 410 are placed flat in the upper accommodating cavity 1b, so the thickness requirement of the upper accommodating cavity 1b is not high, and the overall thickness of the detection device can be reduced.
[0040] Further, the UHF signal processing board 410 and the low-frequency communication board 420 are connected as a whole, and the element surfaces of the two are arranged away from each other.
[0041] Referring to Figure 4 , the UHF signal processing board 410 comprises an ultrasonic processing area 4a and a UHF processing area 4b.
[0042] Referring to Figure 4 , the ultrasonic processing area 4a comprises an ultrasonic signal processing area 411 and an ultrasonic pre-amplification area 412. Figure 3 The isolation grooves comprise a first isolation groove 510 and a second isolation groove 520, which are respectively used to accommodate the ultrasonic signal processing area 411 and the ultrasonic pre-amplification area 412.
[0043] Referring to Figure 4The UHF processing area 4b includes a logarithmic detection area 413, an intermediate frequency filtering area 414, a local oscillation area 415, and a pre-amplification and mixing processing area 416. Figure 3 The isolation grooves further include a third isolation groove 530, a fourth isolation groove 540, a fifth isolation groove 550, and a sixth isolation groove 560, which are respectively used for accommodating the logarithmic detection area 413, the intermediate frequency filtering area 414, the local oscillation area 415, and the pre-amplification and mixing processing area 416.
[0044] By arranging the physical isolation plate 500 and placing the various areas of the UHF signal processing plate 410 in different isolation grooves of the physical isolation plate 500, the various areas are physically isolated in the respective grooves, which can prevent interference between different areas of the UHF signal processing plate 410 and avoid noise interference caused by low-frequency signals on the UHF signals.
[0045] In a preferred embodiment, referring to Figure 1 and Figure 2 The shell 100 includes a shell bottom box 110 and a shell cover plate 120. The shell bottom box 110 and the shell cover plate 120 are both made of aluminum alloy and are pressure-cast.
[0046] Referring to Figure 5 The shell bottom box 110 is provided with a transverse partition plate 111, which divides the inner cavity of the shell bottom box 110 into the lower accommodating cavity 1a and the upper accommodating cavity 1b. Generally, the transverse partition plate 111 is integrally formed with the shell bottom box 110, and the transverse partition plate 111 is provided with a slot 111a (see Figure 5 ) so that the UHF PCB antenna 200 can be connected to the signal processing PCB plate 400 in the upper accommodating cavity 1b to transmit signals.
[0047] The shell cover plate 120 is closed and covered on the upper accommodating cavity 1b of the shell bottom box 110 by means of detachable screws 140, and the shell cover plate 120 can be separated from the shell bottom box 110 by detaching the screws 140. The shell cover plate 120 and the shell bottom box 110 are sealed by a silica gel sealing ring 130 to prevent water vapor from entering the shell 100 through the gap between the two. Referring to Figure 2 The silica gel sealing ring 130 is fixedly arranged on the lower surface of the shell cover plate 120, and the top surface of the shell bottom box 110 is provided with a groove 113 matched with the silica gel sealing ring 130. When the shell cover plate 120 is closed on the shell bottom box 110, the silica gel sealing ring 130 is embedded in the groove 113 to seal the gap between the two.
[0048] In addition, the bottom of the lower accommodating cavity 1a is waterproofly sealed by the potting glue 600. The potting glue 600 is epoxy resin potting glue. After being sealed by the potting glue 600, water vapor can be prevented from entering the lower accommodating cavity 1a where the UHF PCB antenna 200 is located.
[0049] After being sealed by the silica gel sealing ring 130 and the potting glue 600, the waterproof and dustproof levels of the UHF partial discharge detection device can be greatly improved, and the outdoor long-term adaptability can be improved.
[0050] The height of the lower accommodating cavity 1a is between 20 mm and 80 mm, so as to ensure that a high enough cavity structure is formed at the back of the UHF PCB antenna 200, which is beneficial to signal reflection to the antenna part, prevents signal back radiation, isolates external interference, and improves impedance matching.
[0051] In a preferred embodiment, referring to Figure 3 and Figure 5 , the physical isolation plate 500 is arranged on the upper surface of the transverse partition plate 111, the isolation groove is arranged on the upper surface of the physical isolation plate 500, and the physical isolation plate 500 is made of aluminum alloy. The elements of the UHF signal processing plate 410 face downward and are invertedly buckled on the physical isolation plate 500, and the low-frequency communication plate 420 is located above the UHF signal processing plate 410 and the elements thereof face upward.
[0052] In addition, referring to Figure 2 , Figure 3 and Figure 5 , the upper accommodating cavity 1b is provided with a vertical partition plate 112, which divides the upper accommodating cavity 1b into a left upper accommodating cavity 1b1 and a right upper accommodating cavity 1b2. The power supply assembly 300 is arranged in the left upper accommodating cavity 1b1, and the signal processing PCB plate 400 is arranged in the right upper accommodating cavity 1b2. The vertical partition plate 112 is provided with a corresponding notch 1121 for the power supply line of the power supply assembly 300 to pass through and be connected to the signal processing PCB plate 400.
[0053] In addition, the outer wall of the shell bottom box 110 is further provided with a detection device switch button 710, a Lora antenna interface 720, and an ultrasonic interface 730 at a position corresponding to the right upper accommodating cavity 1b2.
[0054] In a preferred embodiment, referring to Figure 1 , the bottom of the shell bottom box 110 is in an arc structure 114, and the arc structure 114 is provided with an ear plate 115 at both ends.
[0055] The arc-shaped structure 114 can make the ultrahigh frequency partial discharge detection device of the utility model adapt to the flange of the pot-type insulator of the GIS equipment, and the setting of the lug plate 115 is conducive to fixing the ultrahigh frequency partial discharge detection device on the flange through the corresponding hoop structure. The above only is the preferred implementation manner of the utility model and is not used for limiting the utility model, and for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A device for detecting ultra-high frequency partial discharge of GIS equipment, characterized in that, The utility model relates to a kind of high-frequency signal processing device, including: A shell (100) is formed with lower accommodating cavity (1a) and upper accommodating cavity (1b) in the shell (100) is divided; Ultra-high frequency PCB antenna (200) is arranged in the lower accommodating cavity (1a); Power supply assembly (300) is arranged in the upper accommodating cavity (1b); Signal processing PCB board (400) is arranged in the upper accommodating cavity (1b), and it includes ultra-high frequency signal processing board (410) and low-frequency communication board (420); Wherein, the upper accommodating cavity (1b) is also provided with physical isolation board (500), the surface of the physical isolation board (500) is matched with the different partitions of the ultra-high frequency signal processing board (410) and is provided with matching isolation groove, the ultra-high frequency signal processing board (410) is buckled on the physical isolation board (500), and different partitions are respectively placed in different isolation grooves.
2. The ultra-high frequency partial discharge detection device for GIS equipment according to claim 1, characterized in that, The low-frequency communication board (420) and the ultra-high frequency signal processing board (410) are parallel to each other and arranged one above the other in the upper accommodating cavity (1b).
3. The device according to claim 2, characterized in that, The ultra-high frequency signal processing board (410) and the low-frequency communication board (420) are connected as a whole, and the element faces of the two are arranged away from each other.
4. The device according to any one of claims 1 to 3, characterized in that, The ultra-high frequency signal processing board (410) includes ultrasonic processing area (4a) and ultra-high frequency processing area (4b).
5. The ultra-high frequency partial discharge detection device for GIS equipment according to claim 4, characterized in that, The ultrasonic processing area (4a) includes ultrasonic signal processing area (411), ultrasonic preamplification area (412);The isolation groove includes first isolation groove (510) and second isolation groove (520), and the two are respectively used to accommodate ultrasonic signal processing area (411) and ultrasonic preamplification area (412) placed therein; The ultra-high frequency processing area (4b) includes logarithmic detection area (413), intermediate frequency filter area (414), local oscillation area (415), preamplification and mixing processing area (416);The isolation groove further includes third isolation groove (530), fourth isolation groove (540), fifth isolation groove (550) and sixth isolation groove (560), and the four are respectively used to accommodate logarithmic detection area (413), intermediate frequency filter area (414), local oscillation area (415) and preamplification and mixing processing area (416) placed therein.
6. The ultra-high frequency partial discharge detection device for GIS equipment according to claim 1, characterized in that, The shell (100) includes shell bottom box (110) and shell cover plate (120); The shell bottom box (110) is provided with transverse partition (111), and the inner cavity of shell bottom box (110) is divided into the lower accommodating cavity (1a) and the upper accommodating cavity (1b); The shell cover plate (120) is closed and combined on the upper accommodating cavity (1b) of the shell bottom box (110), and the shell cover plate (120) and the shell bottom box (110) are separable.
7. The device according to claim 6, characterized in that, The physical isolation plate (500) is arranged on the upper surface of the transverse partition plate (111), the isolation groove is arranged on the upper surface of the physical isolation plate (500), and the physical isolation plate (500) is made of an aluminum alloy material.
8. The ultra-high frequency partial discharge detection device for GIS equipment according to claim 6, characterized in that, A vertical partition plate (112) is arranged in the upper accommodating cavity (1b) and divides the upper accommodating cavity (1b) into a left upper accommodating cavity (1b1) and a right upper accommodating cavity (1b2); wherein the power supply assembly (300) is arranged in the left upper accommodating cavity (1b1), and the signal processing PCB (400) is arranged in the right upper accommodating cavity (1b2).
9. The ultra-high frequency partial discharge detection device for GIS equipment according to claim 6, characterized in that, The shell cover plate (120) and the shell bottom box (110) are sealed by a silica gel sealing ring (130).
10. The ultra-high frequency partial discharge detection device for GIS equipment according to claim 1, characterized in that, The bottom of the lower accommodating cavity (1a) is waterproofly sealed by potting glue (600).