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CN-119335136-B - Method, device and system for monitoring gas component polymerization curve of closed type switch equipment

CN119335136BCN 119335136 BCN119335136 BCN 119335136BCN-119335136-B

Abstract

The invention provides a method, a device and a system for monitoring a gas component polymerization curve of closed type switch equipment, and belongs to the technical field of monitoring. The method comprises the steps of collecting SF 6 gas decomposition product samples and sending the SF 6 gas decomposition product samples into a monitoring device, wherein the samples are mixed gas collected after fault events are simulated in a fault generating device filled with SF6 gas and conventional internal insulating media, analyzing decomposition components of each sample of a single fault event, determining concentration values of SO 2 、H 2 S, CO to obtain a decomposition component data time sequence, respectively performing curve polymerization to obtain an SO 2 polymerization curve, an H 2 S polymerization curve and a CO polymerization curve, establishing a corresponding relation between a time-varying condition of slope k of the curve and fault characteristics, storing the relation as a diagnosis reference model, collecting gas samples of detected equipment, sending the gas samples into the monitoring device, analyzing the decomposition components, performing curve polymerization, and comparing the obtained polymerization curve with the stored diagnosis reference models to obtain the fault type of the detected equipment.

Inventors

  • NIU BO
  • MA FEIYUE
  • ZHOU XIU
  • PAN LIANGLIANG
  • NI HUI
  • LU HONGJIAN
  • XU YUHUA
  • SUN SHANGPENG
  • XIE DONG

Assignees

  • 国网宁夏电力有限公司电力科学研究院
  • 国网宁夏电力有限公司
  • 国网宁夏电力有限公司超高压公司

Dates

Publication Date
20260505
Application Date
20241028

Claims (9)

  1. 1. The utility model provides a closed switchgear gas component polymerization curve monitoring devices, a serial communication port, including top cap (2) that connects gradually, equipment box (1), base (3), equipment box (1) is by U type panel beating frame (11), embedded case (12), assist solid heat abstractor (15), monitoring module (124), detection module (125), gas circuit module (126) are constituteed, U type panel beating frame (11), assist solid heat abstractor (15), embedded case (12) are from outside to inside set gradually and equal fixed mounting is on base (3), gas circuit module (126), detection module (125), monitoring module (124) connect gradually and all install in embedded case (12); One end of the gas path module (126) is connected with the air charging and discharging port of the detected equipment through an adapter, and the other end of the gas path module is connected with the detection module and is used for collecting a gas sample in the detected equipment and pumping the gas sample into the detection module (125); Providing a gas sensor in the detection module (125) for detecting decomposition component data of the gas sample, and transmitting the detection data to the monitoring module (124), the decomposition component data comprising a SO 2 、H 2 S, CO concentration value; the monitoring module (124) is used for recording a time sequence of the decomposed component data of the detected equipment, and further taking the period number n as a horizontal axis and three component concentration values as a vertical axis, respectively carrying out curve aggregation to obtain an SO 2 aggregation curve, an H 2 S aggregation curve and a CO aggregation curve; The monitoring module (124), the detection module (125) and the gas circuit module (126) generate a large amount of heat in the working process, and the auxiliary heat dissipation device (15) is used for dissipating heat of the monitoring module (124), the detection module (125) and the gas circuit module (126), so that the sensitivity of the gas sensor is prevented from being reduced due to heating, and the accuracy of data acquisition of the sensor is improved; The U-shaped sheet metal frame (11) comprises a left limiting plate, a rear radiating orifice plate (16) and a right limiting plate which are connected in sequence, wherein the rear radiating orifice plate (16) is provided with a radiating hole structure; The auxiliary heat dissipation device (15) comprises a left inner frame plate fixedly arranged on the inner surface of the left limiting plate, a right inner frame plate arranged on the inner surface of the right limiting plate, a heat extraction component support frame and a heat extraction component (154); The heat exhausting component (154) comprises a fixed plate (1541), rotating shafts (1543) fixedly connected to the upper parts of the left side and the right side of the fixed plate (1541), connecting blocks (1544) rotatably connected to the lower parts of the left side and the right side of the fixed plate (1541), adjusting hole rods (1545) connected to the tail ends of the connecting blocks (1544), a group of limiting jacks are formed in the adjusting hole rods (1545), guide sliding blocks (1549) are fixedly arranged on the adjusting hole rods (1545), N 2 air guide grooves (1546) are formed in the fixed plate (1541), a dust cover (1542) is arranged at an opening part of one side of the air guide grooves (1546) facing the rear radiating pore plate (16), fixing frames (1547) are arranged at an opening part of one side of the embedded box (12), and an electric control fan (1548) is arranged on each fixing frame (1547); The heat extraction assembly support frame is fixedly arranged between the left inner frame plate and the right inner frame plate, the heat extraction assembly support frame is of a hollow structure, N 1 heat extraction assembly mounting grooves are formed in the middle from top to bottom and used for mounting N 1 heat extraction assemblies (154), a pair of rotating shaft holes are formed in the upper parts of the inner surfaces of the left side and the right side of the heat extraction assembly mounting grooves, two rotating shafts (1543) of the heat extraction assemblies (154) are positioned on the same shaft line, the tail ends of the two rotating shafts are respectively connected in the rotating shaft holes of the heat extraction assembly mounting grooves in a rotating mode, N 1 penetrating grooves (153) are formed in the left hollow column (155) and the right hollow column (155) of the heat extraction assembly support frame respectively, the penetrating grooves (153) are formed in the left side and the right side of the heat extraction assembly mounting grooves respectively, bolt through holes are formed in the upper inner side walls of the penetrating grooves (153) from top to bottom, a guide sliding chute is formed in the left side and the right side walls of the penetrating grooves (153), the guide chute is formed in the shape of the guide slider (1549), two adjusting hole rods (1545) are respectively arranged in the penetrating grooves (153) on the left side and the right side of the heat extraction assembly mounting grooves respectively, and the two guide shafts (153) are respectively connected in the two sliding limiting rods (153) respectively; The limiting pull rod (152) comprises a pull ring (1521), a bending rod (1522) with a continuous right angle shape and a bolt assembly, wherein the pull ring (1521) is connected to the top of the bending rod (1522) and is positioned outside the hollow column (155), the bending rod (1522) comprises a vertical structure and a horizontal structure which are sequentially connected in a back-shape and repeatedly, the vertical structure is positioned at the side edge of the through groove (153), the horizontal structure is positioned below the through groove (153), and the through groove (153) is utilized for limiting and preventing the limiting pull rod (152) from dislocating from the hollow column (155); lifting the limit pull rod (152) upwards to enable each bolt to be separated from the adjusting hole rod (1545), adjusting each fixing plate (1541) to a required angle, then, dropping the limit pull rod (152) to enable each bolt to be clamped with the adjusting hole rod (1545) again, realizing alignment output of the fan machine (1548), enabling each fan machine (1548) to be connected to and independently controlled by a sub-controller, enabling the sub-controllers to be installed on the fixing plate (1541), and enabling each sub-controller to be connected to and intensively controlled by the monitoring module (124).
  2. 2. The closed switchgear gas composition polymerization curve monitoring device according to claim 1, wherein the monitoring module (124) is configured to: Analyzing the decomposition components of each sample of a single fault event, determining the concentration value of SO 2 、H 2 S, CO, and obtaining a decomposition component data time sequence, wherein the samples are mixed gas acquired after the fault event is simulated in a fault generating device filled with SF6 gas and a conventional internal insulating medium based on preset fault characteristics, and the fault event comprises different types of discharge faults and overheat faults at different temperatures under different voltage levels; Further, respectively carrying out curve polymerization by taking the period number n as a horizontal axis and three component concentration values as vertical axes to obtain an SO 2 polymerization curve, an H 2 S polymerization curve and a CO polymerization curve; And establishing a corresponding relation between the time-varying condition of the slope k of the curve and the fault characteristics, and storing the corresponding relation as a diagnosis reference model.
  3. 3. The device for monitoring the polymerization curve of the gas components of the closed type switch equipment according to claim 2, wherein the number N 1 of the heat extraction components (154) is more than or equal to 5, one side corresponds to the heat extraction holes formed in the box body (121), the other side corresponds to the rear heat dissipation pore plate (16) to form pumping discharge, the effect of rapidly guiding out heat is achieved, and the number N 2 of the electric control fan machines (1548) on the fixed plate (1541) is more than or equal to 3.
  4. 4. The closed type switchgear gas component polymerization curve monitoring device according to claim 3, wherein N 3 sliding rails (13) are horizontally arranged on the inner surface of the left supporting plate and the inner surface of the right supporting plate of the auxiliary and fixed heat dissipation device (15), and sliding pieces (14) are connected on the sliding rails (13) in a sliding manner; The embedded box (12) consists of a box body (121) and a sinking carrier (123) for placing each module, wherein the front side of the embedded box (12) is opened, the rear side plate is provided with a vent hole, and the embedded box comprises the following components: n 3 -1 wire harness reservation baffles (127) are arranged in the box body (121) from top to bottom to form N 3 placement grooves for placing the sinking carrier (123), and the left and right inner side walls of each placement groove are respectively provided with a side sliding groove (1211), and the positions of the inner side walls of the two placement grooves corresponding to the side sliding grooves (1211) are respectively provided with a sliding way (122); The sinking carrier (123) comprises a U-shaped groove frame body (1231) with an outer edge table structure, auxiliary moving rails (1232) are horizontally arranged on the left side and the right side of the U-shaped groove frame body (1231) and positioned below the outer edge table structure, connecting rods (1234) are fixedly connected to the rear sides of the two outer walls of the U-shaped groove frame body (1231), the connecting rods (1234) penetrate through sliding ways (122) and are fixedly connected with the surfaces of sliding pieces (14), and line clamping grooves (1233) are formed in the U-shaped groove frame body (1231); The device is arranged from top to bottom, a monitoring module (124) is arranged in a first sinking carrier, a detection module (125) is arranged in a second sinking carrier, and a gas circuit module is arranged in a third sinking carrier, wherein the gas circuit module is connected with the detection module (125) through a wire harness and the gas circuit is connected with the detection module (125), and the detection module (125) is connected with the monitoring module (124) through the wire harness; A groove (1271) is formed in the wire harness reserved partition board (127), a group of threading holes (1272) are formed in the surface of the groove (1271), a group of wire clamping frames (1273) are correspondingly arranged beside each threading hole (1272), a group of reset tension springs (1274) are fixedly arranged on the side wall of the groove (1271), the group of wire clamping frames (1273) are composed of fixed wire clamping frames and movable wire clamping frames, the wire harness or the air circuit pipeline sequentially penetrates through the threading holes (1272), the movable ends of the wire clamping frames, the reset tension springs (1274) and the movable wire clamping frames from below to form a U shape, and then the wire harness or the air circuit pipeline is connected to equipment through the wire clamping grooves (1233) or enters the upper wire harness reserved partition board (127), wherein the wire harness or the air circuit pipeline is fixed by the movable wire clamping frames, but the wire harness or the air circuit pipeline is allowed to be separated under the action of external force; When the sinking carrier (123) is pushed and pulled by external force, the connecting rod (1234) drives the sliding piece (14) to move along the horizontal direction under the supporting action of the auxiliary moving rail (1232), the sliding way (122) and the anti-drop sliding block (1212), so that the sinking carrier (123) is displaced to extend out of the placing groove or reset, when the sinking carrier (123) stretches out of the placing groove, the wire harness or the air channel pipeline drops from the movable wire clamp frame, the reset tension spring (1274) stretches, when the sinking carrier (123) resets into the placing groove, the reset tension spring (1274) resets, the wire harness or the air channel pipeline enters and is clamped to the movable wire clamp frame through the external force, and observation, overhaul and maintenance are conveniently carried out on the monitoring module (124), the detection module (125) and the air channel module (126).
  5. 5. The closed type switchgear gas component polymerization curve monitoring device according to claim 4, wherein the adapter is provided with two quick interfaces which are communicated, one quick interface is connected with a gas inlet of the gas circuit module (126), the other quick interface is connected with a gas charging and discharging port of the detected equipment through the adapter, and a filter is installed in the adapter and is used for filtering impurity particles; The gas circuit module (126) is provided with a gas pump and an electric control switch, the electric control switch is connected with the detection module (125) and controlled by the detection module (125), is positioned at the joint of the detection module (125) and is used for controlling the gas circuit on-off between the gas circuit module (126) and the detection module (125), and the gas pump is used for pumping the gas in the gas circuit into the detection module (125).
  6. 6. The closed type switchgear gas component polymerization curve monitoring device according to claim 5, wherein a roller with a brake is arranged on the lower surface of the base (3), the roller is of a one-way wheel or universal wheel type, and the electric control switch adopts an electromagnetic valve.
  7. 7. A method for monitoring a polymerization curve of a gas component of a closed switchgear, wherein an implementation main body is the apparatus for monitoring a polymerization curve of a gas component of a closed switchgear according to any one of claims 1 to 6, comprising the steps of: S1, collecting gas in detected equipment by a gas circuit module and sending collected samples into a detection module, wherein the collection period number n is more than 300, and the period interval time t is more than or equal to 1h and less than or equal to 2h; S2, analyzing the decomposition components of each sample by the detection module, determining the concentration value of SO 2 、H 2 S, CO, obtaining a time sequence of the decomposition component data, and inputting the time sequence to the monitoring module; Step S3, the monitoring module respectively carries out curve polymerization by taking the period number n as a horizontal axis and three component concentration values as vertical axes to obtain an SO 2 polymerization curve, an H 2 S polymerization curve and a CO polymerization curve; and S4, comparing the obtained aggregation curve with each stored diagnosis reference model by the monitoring module to obtain the fault type of the detected equipment.
  8. 8. The method for monitoring a polymerization curve of a gas component of a closed switching device according to claim 7, further comprising, before the step S1: S5, collecting SF6 gas decomposition product samples, wherein the samples are mixed gases collected after simulation of fault events in a fault generating device filled with SF6 gas and conventional internal insulating media based on preset fault characteristics, and the fault events comprise different types of discharge faults and overheat faults with different temperatures under different voltage levels; s6, analyzing the decomposition components of each sample of the single fault event, and determining the concentration value of SO 2 、H 2 S, CO to obtain a decomposition component data time sequence; Step S7, respectively performing curve polymerization by taking the period number n as a horizontal axis and three component concentration values as vertical axes to obtain an SO 2 polymerization curve, an H 2 S polymerization curve and a CO polymerization curve; and S8, establishing a corresponding relation between the time-varying condition of the slope k of the curve and the fault characteristic, and storing the corresponding relation as a diagnosis reference model.
  9. 9. The closed type switchgear gas component polymerization curve monitoring system comprises the closed type switchgear gas component polymerization curve monitoring device and inspected equipment according to any one of claims 1-6, wherein a gas circuit module (126) in the closed type switchgear gas component polymerization curve monitoring device is connected with a gas charging and discharging port of the inspected equipment through an adapter, and the closed type switchgear gas component polymerization curve monitoring device periodically collects mixed gas in the inspected equipment to conduct component analysis and real-time analyzes the fault type of the inspected equipment.

Description

Method, device and system for monitoring gas component polymerization curve of closed type switch equipment Technical Field The invention relates to the technical field of monitoring of gas insulation equipment, in particular to a method, a device and a system for monitoring a gas component polymerization curve of closed type switch equipment. Background SF6 gas has good chemical stability, excellent insulating property and arc extinguishing property, and is suitable for being used as insulating gas for filling the GIS of the closed type switch equipment. Because of some uncertain factors in the aspects of design, materials, process and maintenance of equipment, some defects possibly exist in the equipment, under the action of heat and electricity, the defects are continuously expanded, the insulation is continuously reduced until faults occur, and the safety of power production is affected. Under the conditions of partial discharge, overheat, poor contact and the like in SF6 gas insulation equipment, SF6 in the gas chamber can be decomposed and combined to generate various types of gases, the types and the generation rate of decomposition products are often closely related to the types of internal faults, and the SF6 component detection results can often represent the states and the fault conditions of the closed type switch equipment due to obvious diffusion coefficient differences of different gases. The real-time detection of SF6 components can be performed by chemical analysis, accurate chemical detection requires on-site sampling, laboratory inspection, and sampling and analysis usually still take a period of time after failure confirmation occurs. The time-space difference between the fault occurrence and the sample detection causes the component change in SF6 gas, which affects the accuracy of the detection result, and the real-time property of the data is greatly reduced due to the overlong analysis time, and meanwhile, the inspection process is very inconvenient. Disclosure of Invention In view of the above, the invention provides a method, a device and a system for monitoring a gas component polymerization curve of closed type switchgear, which support on-site inspection, rapidly detect the component content of SF6 gas decomposer of the equipment, rapidly diagnose the latent fault of the equipment according to a diagnosis model, and effectively improve the accuracy and the diagnosis efficiency of the latent fault diagnosis of SF6 electrical equipment. The technical scheme adopted by the embodiment of the invention for solving the technical problems is as follows: The utility model provides a closed switchgear gas component polymerization curve monitoring devices, top cap (2) that connects gradually, equipment box (1), base (3), equipment box (1) are by U type panel beating frame (11), embedded case (12), assist solid heat abstractor (15), monitoring module (124), detection module (125), gas circuit module (126) are constituteed, U type panel beating frame (11), assist solid heat abstractor (15), embedded case (12) are from outside to inside set gradually and all fixed mounting is on base (3), gas circuit module (126), detection module (125), monitoring module (124) connect gradually and all install in embedded case (12); One end of the gas path module (126) is connected with the air charging and discharging port of the detected equipment through an adapter, and the other end of the gas path module is connected with the detection module and is used for collecting a gas sample in the detected equipment and pumping the gas sample into the detection module (125); Providing a gas sensor in the detection module (125) for detecting decomposition component data of the gas sample, and transmitting the detection data to the monitoring module (124), the decomposition component data comprising a SO 2、H2 S, CO concentration value; the monitoring module (124) is used for recording a time sequence of the decomposed component data of the detected equipment, and further taking the period number n as a horizontal axis and three component concentration values as a vertical axis, respectively carrying out curve aggregation to obtain an SO 2 aggregation curve, an H 2 S aggregation curve and a CO aggregation curve; the gas sensor comprises a monitoring module (124), a detection module (125) and a gas circuit module (126), wherein a large amount of heat is generated in the working process, and an auxiliary heat dissipation device (15) is used for dissipating heat of the monitoring module (124), the detection module (125) and the gas circuit module (126), so that the sensitivity of the gas sensor is prevented from being reduced due to heating, and the accuracy of data acquisition of the sensor is improved. The monitoring module (124) is configured to: Analyzing the decomposition components of each sample of a single fault event, determining the concentration value of SO 2、H2 S, CO, and obtaining a decomposition componen