A GIS disconnector gas chamber state detection and early warning device

Abstract

The utility model relates to the field of GIS internal detection early warning technology, and disclose a kind of detection early warning device of GIS disconnecting switch gas chamber state, to solve the shortcoming of not easy from different aspects of physical signal to early warn the operating state of key position of prior art.The utility model is through ultrasonic sensor and ultrahigh frequency sensor synergic monitoring partial discharge, infrared sensor accurate detection contact temperature, vibration sensor capture nearby mechanical vibration of insulating sleeve, SF6 gas parameter sensor integrated monitoring gas concentration / humidity / pressure, realize the multi-angle dynamic coverage of electrical and mechanical state to gas chamber core area;With the conduction reinforcement design of vibration sensor elastic gasket and silicone grease, the anti-interference structure of ultrahigh frequency sensor metal box grounding, the signal optimization of each sensor exclusive filter circuit and the multidirectional adjustment function of infrared sensor guide bracket, the sensitivity and accuracy of monitoring data are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of GIS internal detection and early warning technology, and in particular to a detection and early warning device for the status of the air chamber of a GIS isolation switch. Background Technology

[0002] Gas-insulated switchgear (GIS) is widely used in power systems due to its small footprint and excellent insulation performance. As the core component of GIS, the SF6 gas state, partial discharge, temperature and mechanical vibration parameters inside the disconnector switch directly affect the safety of equipment operation.

[0003] Chinese Patent Publication No. CN218995540U discloses an online monitoring system for internal defects of GIS based on the operating status of disconnect switches. The system uses a multi-source physical signal joint detection device composed of ultrasonic sensors, pulse current sensors, and optical sensors to perform comprehensive, effective, and reliable detection of internal defects in GIS equipment.

[0004] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: The above devices mainly use partial discharge at key locations inside the GIS shell and the light signals generated by the discharge as the main monitoring source. Although the monitoring purpose is achieved, since the detection source is the discharge signal itself, there will be no early warning when the discharge signal is not fully manifested. That is, the detection signal information of key locations inside the GIS shell is not diverse enough, and the early warning feedback is not flexible enough. Therefore, there is room for improvement. Utility Model Content

[0005] The technical problem to be solved by this utility model is that the existing technology is not easy to predict the operating status of key locations from physical signals from different aspects. To this end, we propose a detection and early warning device for the status of the air chamber of a GIS disconnect switch.

[0006] To achieve the above objectives, this application adopts the following technical solution: a detection and early warning device for the gas chamber status of a GIS disconnector switch, comprising a detection box installed on the GIS body, the detection box being connected to an insulating bracket welded to the GIS body by bolts, a control processor and multiple audible and visual alarms being installed inside the detection box, a guide bracket being installed at the top of the detection box, an infrared sensor being fixed on the guide bracket, an ultrasonic sensor, an ultra-high frequency sensor, and a vibration sensor being installed on the outer wall of the GIS body, the detection points of the ultrasonic sensor, ultra-high frequency sensor, and infrared sensor being relative to the contact points in the GIS body, the vibration sensor being located near the insulating sleeve on the GIS body, a connecting pipe being fixed on the other side of the GIS body, an SF6 gas parameter sensor being embedded inside the connecting pipe, the output terminals of the ultrasonic sensor, ultra-high frequency sensor, vibration sensor, infrared sensor, and SF6 gas parameter sensor being signal-connected to the input terminal of the control processor, and the output terminal of the control processor being signal-connected to the input terminal of the audible and visual alarms.

[0007] Preferably, an elastic pad is fixed to the bottom of the vibration sensor, the contact surface between the elastic pad and the GIS body is filled with silicone grease, and support plates are fixed to both sides of the vibration sensor, the support plates are fixedly connected to the GIS body by bolts.

[0008] Preferably, the UHF sensor is externally equipped with a metal box, and the metal box and the GIS main body are grounded together.

[0009] Preferably, a sealing sleeve is fixed to the outer end of the connecting pipe, and sealing flanges are fixed to the contact surfaces of the sealing sleeve and the connecting pipe. The sealing flanges are connected by bolts, and sealing plugs are filled at the connection points between the sealing sleeve and the wires on the SF6 gas parameter sensor.

[0010] Preferably, the SF6 gas parameter sensor integrates SF6 concentration, humidity and pressure detection functions, and the output terminal of the SF6 gas parameter sensor is equipped with a signal amplification circuit.

[0011] Preferably, the output terminal of the ultra-high frequency sensor is provided with an ultra-high frequency signal filtering circuit, the output terminal of the vibration sensor is provided with a low frequency filtering circuit, and the output terminal of the ultrasonic sensor is provided with a bandpass filtering circuit.

[0012] Preferably, the guide bracket includes a lead screw A fixed on the detection box, the lead screw A is installed inside the transverse bracket, a slide plate is fitted on the lead screw A, the slide plate and the transverse bracket are slidably connected, a longitudinal support rod is fixed at the top of the slide plate, a lead screw B passes through the interior of the longitudinal support rod, a connecting sleeve is fitted on the exterior of the lead screw B, one side of the connecting sleeve extends to the exterior of the longitudinal support rod, and the infrared sensor and the connecting sleeve are snapped together.

[0013] The technical effects and advantages of this utility model are as follows: This invention achieves multi-angle dynamic coverage of the electrical and mechanical status of the core area of ​​the gas chamber by using ultrasonic and UHF sensors to collaboratively monitor partial discharge, infrared sensors to accurately detect contact temperature, vibration sensors to capture mechanical vibrations near the insulating sleeve, and SF6 gas parameter sensors to integrate and monitor gas concentration / humidity / pressure. Combined with the vibration sensor's elastic gasket and silicone grease conduction enhancement design, the UHF sensor's metal box grounding anti-interference structure, signal optimization of dedicated filter circuits for each sensor, and the multi-directional adjustment function of the infrared sensor's guide bracket, the sensitivity and accuracy of the monitoring data are significantly improved. The control processor reduces the risk of false triggering through multi-parameter threshold comparison and cross-analysis, the audible and visual alarm provides real-time warnings, and the SF6 sensor's sealed design ensures the gas chamber's airtightness. Overall, this invention achieves comprehensive perception, accurate judgment, and timely warning of the GIS gas chamber's operating status, effectively improving equipment operation safety and maintenance reliability. Attached Figure Description

[0014] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the insulating support distribution of this utility model; Figure 3 This is a three-dimensional structural diagram of the fixed push plate distribution of this utility model; Figure 4 This is a three-dimensional structural diagram of the sealing sleeve of this utility model; Figure 5 This is a three-dimensional structural diagram of the elastic gasket of this utility model; Figure 6 This is a three-dimensional structural diagram of the horizontal support distribution of this utility model; Figure 7 This is a three-dimensional structural diagram of the connecting sleeve distribution of this utility model.

[0015] Legend: 1. Detection box; 11. Control processor; 12. Audible and visual alarm; 13. Insulating bracket; 2. GIS main body; 3. Ultrasonic sensor; 4. UHF sensor; 41. Metal box; 5. Vibration sensor; 51. Elastic gasket; 52. Support plate; 6. Infrared sensor; 61. Horizontal bracket; 62. Lead screw A; 63. Slide plate; 64. Longitudinal support rod; 65. Lead screw B; 66. Connecting sleeve; 7. SF6 gas parameter sensor; 71. Connecting pipe; 72. Sealing sleeve; 73. Sealing plug; 74. Sealing flange. Detailed Implementation

[0016] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0017] Reference Figures 1-6 As shown, this utility model provides a technical solution: a detection and early warning device for the status of a GIS disconnector switch gas chamber, including a detection box 1 installed on the GIS body 2. The detection box 1 is connected to an insulating bracket 13 welded to the GIS body 2 by bolts. The detection box 1 contains a control processor 11 and multiple audible and visual alarms 12. A guide bracket is installed at the top of the detection box 1, and an infrared sensor 6 is fixed on the guide bracket. The infrared sensor 6 integrates a temperature compensation algorithm, which corrects the measured value based on the preset thermal conductivity parameter of the GIS body 2 shell material, ensuring the accuracy of contact temperature monitoring. Ultrasonic... The detection points of the wave sensor 3, UHF sensor 4, vibration sensor 5, ultrasonic sensor 3, UHF sensor 4, and infrared sensor 6 are located relative to the contact points in the GIS body 2. The vibration sensor 5 is located near the insulating sleeve on the GIS body 2. A connecting pipe 71 is fixed on the other side of the GIS body 2. An SF6 gas parameter sensor 7 is embedded inside the connecting pipe 71. The output terminals of the ultrasonic sensor 3, UHF sensor 4, vibration sensor 5, infrared sensor 6, and SF6 gas parameter sensor 7 are connected to the input terminal of the control processor 11. The output terminal of the control processor 11 is connected to the input terminal of the audible and visual alarm 12.

[0018] The ultrasonic sensor 3 and the ultra-high frequency sensor 4 work together to reduce partial discharge in the GIS body 2. Simultaneously, the infrared sensor 6 is used to further monitor the internal temperature of the GIS body 2, including the discharge and temperature at the contact points, to determine the operating status of the GIS body 2. The vibration sensor 5, due to the proximity and connection between the insulating sleeve and the contacts, monitors the mechanical vibration at that location to further monitor the working status of the core contact area in the GIS body 2. The SF6 gas parameter sensor 7 monitors the SF6 gas level inside the GIS body 2, further ensuring the safety of the core positions such as the contacts within the GIS body 2. This multi-angle dynamic monitoring is achieved. Combined with the audible and visual alarm 12, real-time warnings of the operating status are provided, further reducing the possibility of false triggering based on multi-angle monitoring.

[0019] Reference Figure 4 As shown in this embodiment: an elastic pad 51 is fixed to the bottom of the vibration sensor 5, the contact surface between the elastic pad 51 and the GIS body 2 is filled with silicone grease, and support plates 52 are fixed to both sides of the vibration sensor 5. The support plates 52 are fixedly connected to the GIS body 2 by bolts.

[0020] The elastic gasket 51 and silicone grease are used together to further promote the transmission of vibration near the insulating sleeve, thereby increasing the monitoring sensitivity of the vibration sensor 5 and improving the detection effect.

[0021] Reference Figure 5 As shown, the UHF sensor 4 is externally equipped with a metal box 41, and the metal box 41 and the GIS main body 2 are grounded together.

[0022] The metal box 41 and grounding are used to avoid interference from external electromagnetic fields on the UHF sensor 4, thereby improving the accuracy of real-time monitoring.

[0023] Reference Figure 2 , Figure 3 As shown, a sealing sleeve 72 is fixed to the outer end of the connecting pipe 71. Sealing flanges 74 are fixed to the contact surfaces of the sealing sleeve 72 and the connecting pipe 71. The sealing flanges 74 are connected by bolts. Sealing plugs 73 are filled at the connection points between the sealing sleeve 72 and the wires on the SF6 gas parameter sensor 7.

[0024] By using the sealing sleeve 72 and sealing flange 74, the airtightness of the gas inside the GIS main body 2 is further improved, preventing gas from leaking out from the connection gap between the connecting pipe 71 and the SF6 gas parameter sensor 7, and ensuring the safety of SF6 gas filling inside the GIS main body 2.

[0025] Reference Figure 6 As shown, the SF6 gas parameter sensor 7 integrates SF6 concentration, humidity and pressure detection functions, and the output terminal of the SF6 gas parameter sensor 7 is equipped with a signal amplification circuit.

[0026] The integrated design of the SF6 gas parameter sensor 7 allows for the detection of the SF6 gas filling status in the GIS main body 2 from multiple angles. Changes in the SF6 gas level can be detected by the audible and visual alarm 12 to provide early warning and prevent instability and danger in the operation of the GIS main body 2 due to gas shortage.

[0027] Reference Figure 1 As shown, the output terminal of the ultra-high frequency sensor 4 is equipped with an ultra-high frequency signal filtering circuit, the output terminal of the vibration sensor 5 is equipped with a low frequency filtering circuit, and the output terminal of the ultrasonic sensor 3 is equipped with a bandpass filtering circuit.

[0028] By using different types of filter circuits in conjunction with the series connection of the corresponding ultra-high frequency sensor 4, vibration sensor 5 and ultrasonic sensor 3, each component can accurately monitor the frequency signal, prevent mutual interference, and improve the stability of the data signal.

[0029] Reference Figure 1 , Figure 7 As shown, the guide bracket includes a lead screw A62 fixed on the detection box 1. The lead screw A62 is installed inside the transverse bracket 61. A slide plate 63 is sleeved on the lead screw A62. The slide plate 63 and the transverse bracket 61 are slidably connected. A longitudinal support rod 64 is fixed to the top of the slide plate 63. A lead screw B65 passes through the interior of the longitudinal support rod 64. A connecting sleeve 66 is sleeved on the exterior of the lead screw B65. One side of the connecting sleeve 66 extends to the exterior of the longitudinal support rod 64. The infrared sensor 6 and the connecting sleeve 66 are fixed by snap-fit.

[0030] Screw A62 is used to move the slide plate 63 laterally, and screw B65 is used to move the connecting sleeve 66 longitudinally. With the cooperation of the two, the position of the infrared sensor 6 can be adjusted in multiple directions to ensure that the monitoring position of the infrared sensor 6 can accurately correspond to the core contact area in the GIS main body 2.

[0031] Working principle: The operator uses ultrasonic sensor 3 to capture the 20kHz-200kHz ultrasonic signals generated by the discharge in the GIS body 2 and converts them into electrical signals. This is combined with ultra-high frequency sensor 4 receiving the 300MHz ultrasonic pulses generated by the discharge and converting them into electrical signals, which are then sent to control processor 11 for processing. Simultaneously, vibration sensor 5 transmits vibration signals from near the insulating sleeve to control processor 11, SF6 gas parameter sensor 7 transmits signals such as the SF6 gas concentration in the GIS body 2 to control processor 11, and infrared sensor 6 transmits temperature signals from the contact area in the GIS body 2 to control processor 11. The control processor 11 then processes the partial discharge signals... The system compares the real-time parameters of the signal, vibration signal, gas signal, and temperature signal with the preset corresponding parameter values ​​to determine if there is an abnormality. At the same time, the control processor 11 performs cross-analysis of the parameters of the ultrasonic sensor 3, UHF sensor 4 and vibration sensor 5, ultrasonic sensor 3, UHF sensor 4 and infrared sensor 6, ultrasonic sensor 3, UHF sensor 4 and SF6 gas parameter sensor 7, and vibration sensor 5, infrared sensor 6 and SF6 gas parameter sensor 7. This cross-analysis is then used to control the activation of the relative audible and visual alarm 12. The system can also preliminarily determine whether the change in the state of the contact area in the GIS main body 2 is caused by a mechanical fault, circuit abnormality, or abnormal SF6 gas concentration, so that relevant personnel can conduct timely inspections.

[0032] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A detection and early warning device for the status of a GIS disconnector switch chamber, characterized in that: The system includes a detection box installed on the GIS main body. The detection box is connected to an insulating bracket welded to the GIS main body by bolts. The detection box contains a control processor and multiple audible and visual alarms. A guide bracket is installed at the top of the detection box, and an infrared sensor is fixed on the guide bracket. An ultrasonic sensor, an ultra-high frequency sensor, and a vibration sensor are respectively installed on the outer wall of the GIS main body. The detection points of the ultrasonic sensor, ultra-high frequency sensor, and infrared sensor are located relative to the contact points in the GIS main body. The vibration sensor is located near the insulating sleeve on the GIS main body. A connecting pipe is fixed to the other side of the GIS main body. An SF6 gas parameter sensor is embedded inside the connecting pipe. The output terminals of the ultrasonic sensor, ultra-high frequency sensor, vibration sensor, infrared sensor, and SF6 gas parameter sensor are connected to the input terminal of the control processor. The output terminal of the control processor is connected to the input terminal of the audible and visual alarms.

2. The detection and early warning device for the status of the GIS disconnector switch chamber according to claim 1, characterized in that: An elastic pad is fixed to the bottom of the vibration sensor. The contact surface between the elastic pad and the GIS body is filled with silicone grease. Support plates are fixed to both sides of the vibration sensor. The support plates are fixedly connected to the GIS body by bolts.

3. The detection and early warning device for the status of the GIS disconnector switch chamber according to claim 1, characterized in that: The ultra-high frequency sensor is externally equipped with a metal box, and the metal box and the GIS main body are grounded together.

4. The detection and early warning device for the status of the GIS disconnector switch chamber according to claim 1, characterized in that: A sealing sleeve is fixed to the outer end of the connecting pipe, and sealing flanges are fixed to the contact surfaces of the sealing sleeve and the connecting pipe. The sealing flanges are connected by bolts, and a sealing plug is filled at the connection between the sealing sleeve and the wire on the SF6 gas parameter sensor.

5. The detection and early warning device for the status of the GIS disconnector switch chamber according to claim 1, characterized in that: The SF6 gas parameter sensor integrates SF6 concentration, humidity and pressure detection functions, and the output terminal of the SF6 gas parameter sensor is equipped with a signal amplification circuit.

6. The detection and early warning device for the status of the GIS disconnector switch chamber according to claim 1, characterized in that: The output terminal of the ultra-high frequency sensor is equipped with an ultra-high frequency signal filtering circuit, the output terminal of the vibration sensor is equipped with a low frequency filtering circuit, and the output terminal of the ultrasonic sensor is equipped with a bandpass filtering circuit.

7. The detection and early warning device for the status of the GIS disconnector gas chamber according to claim 1, characterized in that: The guide bracket includes a transverse bracket and a lead screw A fixed on the detection box. The lead screw A is installed inside the transverse bracket, and a sliding plate is fitted on the lead screw A. The sliding plate and the transverse bracket are slidably connected. A longitudinal support rod is fixed to the top of the sliding plate. A lead screw B passes through the interior of the longitudinal support rod. A connecting sleeve is fitted on the exterior of the lead screw B. One side of the connecting sleeve extends to the exterior of the longitudinal support rod. The infrared sensor and the connecting sleeve are fixed by snap-fit.

Images