CN112986763B - Experimental device for research GIS discharge position detects influence to decomposed gas - Google Patents
Experimental device for research GIS discharge position detects influence to decomposed gas Download PDFInfo
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- CN112986763B CN112986763B CN202110191648.1A CN202110191648A CN112986763B CN 112986763 B CN112986763 B CN 112986763B CN 202110191648 A CN202110191648 A CN 202110191648A CN 112986763 B CN112986763 B CN 112986763B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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Abstract
The invention relates to the field of online monitoring of discharged decomposed gas in a GIS, in particular to an experimental device for researching the influence of a GIS discharge position on the detection of the decomposed gas, and solves the technical problems of simulating corona discharge at different axial and tangential positions in the GIS and the generation and diffusion of the decomposed gas. Corona discharge is caused by the point and plate electrodes, the axial position of the discharge model can be adjusted by the grounding sliding frame, the discharge model is arranged in the defect model positioning holes with different angles, the change of tangential discharge positions can be realized, and the sampling valve is utilized to detect the decomposed gas at different discharge positions.
Description
Technical Field
The invention relates to the field of online monitoring and insulation diagnosis of discharged decomposed gas in a GIS, in particular to an experimental device for researching the influence of a GIS discharge position on the detection of the decomposed gas.
Background
The on-line monitoring technology of the discharge decomposed gas is mature day by day, and the technology is widely applied to a Gas Insulated Switch (GIS). The technology can judge the type of insulation fault and the discharge intensity of the equipment through gas components in the GIS, and can provide a basis for the operation and maintenance of the GIS equipment. However, as the power transmission level increases, the size of the GIS equipment also gradually increases. When discharge defects exist in the GIS, the generated decomposed gas is difficult to diffuse quickly in the GIS cavity. And the distribution of the decomposed gas in the cavity and the concentration of the gas detected from the sampling port of the equipment are different due to different discharge positions, which can cause interference to the insulation diagnosis of the equipment. However, the diffusion process of the decomposed gas is generally ignored in the existing research, the discharge position cannot be changed in the existing experimental device, and the air tightness of the device can be damaged due to the large number of holes.
To sum up, when studying the influence of the discharge position on the detection of the decomposed gas in the GIS, a high-voltage experimental device which can simulate different axial and tangential discharge positions, and has a small number of holes and good sealing performance is needed.
Disclosure of Invention
Aiming at the requirements on an experimental device when the influence of a discharge position on the detection of the decomposed gas in the GIS is researched, the experimental device for researching the influence of the discharge position of the GIS on the detection of the decomposed gas is designed, the experimental device has few openings and good sealing property, and can realize corona discharge and the detection experiment of the decomposed gas at different positions.
The technical scheme adopted by the invention for solving the problems is as follows:
the utility model provides an experimental apparatus for research GIS discharge position detects influence to decomposed gas which characterized in that: the device comprises a high-voltage sleeve, a reducing end cover, a barrel-shaped cavity wall, a sampling valve and a tail end cover plate; the high-voltage sleeve is connected with the wall of the barrel-shaped cavity through a variable-diameter end cover, the sampling valve is welded in the middle of the wall of the barrel-shaped cavity, and the tail end cover plate is connected with the wall of the barrel-shaped cavity through a tail end cover plate fixing bolt; 4 axial T-shaped sliding grooves are evenly arranged on the inner side of the wall of the barrel-shaped cavity along the tangential direction, the included angle between each T-shaped sliding groove is 90 degrees, four sliding contacts are evenly arranged on the grounding sliding frame along the tangential direction, the included angle between every two sliding contacts is 90 degrees, the grounding sliding frame is arranged in the wall of the barrel-shaped cavity body through the sliding contacts and the T-shaped sliding groove, and axial position adjustment is carried out, the edges of the grounding sliding frame and the sliding contact are rounded, 12 defect model positioning holes are evenly distributed on the grounding sliding frame along the tangential direction, the included angle of each defect model positioning hole is 30 degrees, the defect models are arranged on the grounding sliding frame through the defect model positioning holes in different directions, and tangential direction adjustment is carried out, the high-voltage conducting rod is connected with the central conductor of the basin-type insulator, and a spherical conducting rod end part shielding cover is arranged at the end part of the high-voltage conducting rod.
At above-mentioned experimental apparatus of research GIS discharge position to decomposition gas detection influence, high voltage bushing passes through basin formula insulator and complex basin formula insulator connecting bolt and links to each other with the reducing end cover.
In the experimental device for researching the influence of the GIS discharge position on the detection of the decomposed gas, the reducing end cover is connected with the wall of the barrel-shaped cavity through the reducing end cover fixing bolt.
In the experimental device for researching the influence of the GIS discharge position on the detection of the decomposed gas, the tail end cover plate is connected with the wall of the barrel-shaped cavity through the tail end cover plate fixing bolt.
In the experimental device for researching the influence of the GIS discharge position on the detection of the decomposed gas, the sampling valve comprises a valve, a barometer and a sampling port; the air pressure meter is installed through the screw thread in the valve upper end, the sampling port has been seted up on the sampling valve left side, and the air circuit intercommunication of air pressure meter and sampling port and test device is by the valve control.
In the experimental device for researching the influence of the GIS discharge position on the detection of the decomposed gas, the defect model comprises a defect model fixing rod, an end conductor, a flat electrode, a sharp electrode, a defect model electrode frame, a defect model high-voltage end connecting rod and a defect model high-voltage end sleeve; the material of defect model electrode frame is epoxy, defect model electrode frame top is equipped with the tip conductor to link to each other between the plate electrode, the hexagon through-hole has been seted up to the tip conductor, defect model dead lever runs through in the hexagon through-hole and the defect model locating hole of tip conductor, sharp electrode mounting is in defect model electrode frame lower extreme to link to each other with defect model high voltage end sleeve through defect model high voltage end connecting rod, sharp electrode and plate electrode can initiate corona discharge, defect model high voltage end sleeve suit realizes electrical connection on the high voltage conducting rod to axial slip can carry out.
In the experimental device for researching the influence of the GIS discharge position on the detection of the decomposed gas, the high-voltage sleeve, the reducing end cover, the barrel-shaped cavity wall and the basin-type insulator are sealed by the O-shaped sealing ring.
The invention has the beneficial effects that: 1. the experimental device can simulate corona discharge at different axial and tangential positions in the GIS; 2. the experimental device is provided with only one sampling valve, has few openings and good air tightness, and can provide interface support for detecting the decomposed gas; 3. the high-voltage sleeve, the variable-diameter end cover, the barrel-shaped cavity wall and the basin-type insulator of the experimental device are sealed through the O-shaped sealing ring, so that the air tightness of the experimental device is enhanced, and the influence of impurities on decomposition and gas detection is reduced; 4. the edges of the grounding sliding frame and the sliding contact of the experimental device are processed by fillets, and the end part of the high-voltage conducting rod is provided with the shielding cover, so that the interference of the background partial discharge of the device on the discharge intensity measurement of the defect model can be inhibited; 5. the experimental device can be used for researching the influence of the discharge position in the GIS on the detection result of the concentration of the decomposed gas.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is an exploded schematic view of fig. 1.
Fig. 3 is a schematic view of the structure and assembly structure of the discharge model.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
With reference to fig. 1, fig. 2 and fig. 3, the experimental device for studying the influence of the GIS discharge position on the detection of the decomposed gas disclosed by the invention is characterized in that: the device comprises a high-voltage sleeve 1, a reducing end cover 2, a barrel-shaped cavity wall 3, a sampling valve 4, a tail end cover plate 5, a basin-type insulator 2-1, a T-shaped chute 2-2, a grounding sliding frame 2-3, a sliding contact 2-4, a defect model 2-5, a defect model positioning hole 2-6, a high-voltage conducting rod 2-7, a conducting rod end shielding cover 2-8, a basin-type insulator connecting bolt 2-12, a reducing end cover fixing bolt 2-13 and a tail end cover plate fixing bolt 2-14.
The high-voltage bushing 1 is connected with a variable-diameter end cover 2 through a basin-type insulator 2-1 and basin-type insulator connecting bolts 2-12, the variable-diameter end cover 2 is connected with a barrel-shaped cavity wall 3 through variable-diameter end cover fixing bolts 2-13, the sampling valve 4 is welded in the middle of the barrel-shaped cavity wall 3, the tail end cover plate 5 is connected with the barrel-shaped cavity wall 3 through tail end cover plate fixing bolts 2-14, 4 axial T-shaped sliding grooves 2-2 are uniformly arranged on the inner side of the barrel-shaped cavity wall 3 along the tangential direction, the included angle between each T-shaped sliding groove 2-2 is 90 degrees, four sliding contacts 2-4 are uniformly arranged on the grounding sliding frame 2-3 along the tangential direction, the included angle between each sliding contact 2-4 is 90 degrees, the grounding sliding frame 2-3 is arranged in the barrel-shaped cavity wall 3 through the sliding contacts 2-4 and the T-shaped sliding grooves 2-2, and axial position adjustment is carried out, 12 defect model positioning holes 2-6 are uniformly distributed in the grounding carriage 2-3 along the tangential direction, the included angle of each defect model positioning hole 2-6 is 30 degrees, the defect models 2-5 are installed on the grounding carriage 2-3 through the defect model positioning holes 2-6 in different directions and subjected to tangential direction adjustment, the high-voltage conducting rod 2-7 is connected with a central conductor of the basin-shaped insulator 2-1, and the end part of the high-voltage conducting rod 2-7 is provided with a spherical conducting rod end part shielding cover 2-8.
The edges of the grounding sliding frame 2-3 and the sliding contact 2-4 are rounded, so that the corona discharge of the equipment is prevented. The high-voltage bushing 1, the reducing end cover 2, the barrel-shaped cavity wall 3 and the basin-type insulator 2-1 are sealed through an O-shaped sealing ring. Only one sampling valve 4 is arranged, so that the number of holes of the device is reduced, and the air tightness of the device is further improved.
The sampling valve 4 consists of a valve 2-9, a barometer 2-10 and a sampling port 2-11, the barometer 2-10 is installed at the upper end of the valve 2-9 through threads, the sampling port 2-11 is formed in the left side of the sampling valve 4, and the barometer 2-10, the sampling port 2-11 and the gas circuit of the testing device are communicated and controlled by the valve 2-9.
The defect model 2-5 is composed of a defect model fixing rod 3-1, a flat plate electrode 3-2, an end conductor 3-3, a defect model electrode frame 3-4, a sharp electrode 3-5, a defect model high-voltage end connecting rod 3-6 and a defect model high-voltage end sleeve 3-7, wherein the defect model electrode frame 3-4 is made of epoxy resin, the end conductor 3-3 is arranged at the top end of the defect model electrode frame 3-4 and is connected with the flat plate electrode 3-2, a hexagonal through hole is formed in the end conductor 3-3, the defect model fixing rod 3-1 penetrates through the hexagonal through hole of the end conductor 3-3 and a defect model positioning hole 2-6, the sharp electrode 3-5 is arranged at the lower end of the defect model electrode frame 3-4, and the high-voltage end connecting rod 3-6 of the defect model is connected with a high-voltage end sleeve 3-7 of the defect model, the sharp electrode 3-5 and the flat electrode 3-2 can initiate corona discharge, and the high-voltage end sleeve 3-7 of the defect model is sleeved on the high-voltage conducting rod 2-7 to realize electrical connection and can axially slide.
The experimental device comprises the following use procedures:
firstly, the experimental device is completely assembled according to the above description;
disassembling the tail end cover plate 5;
adjusting the axial position of the grounding sliding frame 2-3 according to the experimental requirement;
selecting a proper defect model positioning hole 2-6 according to the experiment requirement, and fixing the tangential position of the defect model 2-5 through a defect model fixing rod 3-1;
fifthly, mounting and disassembling the tail end cover plate 5;
sixthly, opening the valves 2 to 9, vacuumizing and inflating the device through the sampling valve 4, and monitoring the air pressure of the device through a barometer 2 to 10;
connecting the experimental device to an experimental system to perform a corona discharge experiment;
and eighthly, detecting the decomposed gas in the device through a sampling port 2-11 at intervals.
The above embodiments are merely illustrative of the present patent and do not limit the scope of the patent, and those skilled in the art can make modifications to the parts thereof without departing from the spirit and scope of the patent.
Claims (6)
1. The utility model provides an experimental apparatus for research GIS discharge position detects influence to decomposed gas which characterized in that: comprises a high-voltage sleeve (1), a reducing end cover (2), a barrel-shaped cavity wall (3), a sampling valve (4) and a tail end cover plate (5); the high-voltage sleeve (1) is connected with the barrel-shaped cavity wall (3) through a reducing end cover (2), the sampling valve (4) is welded in the middle of the barrel-shaped cavity wall (3), and the tail end cover plate (5) is connected with the barrel-shaped cavity wall (3) through tail end cover plate fixing bolts (2-14);
4 axial T-shaped sliding grooves (2-2) are uniformly arranged on the inner side of the barrel-shaped cavity wall (3) along the tangential direction, an included angle between each two T-shaped sliding grooves (2-2) is 90 degrees, four sliding contacts (2-4) are uniformly arranged on a grounding sliding frame (2-3) along the tangential direction, an included angle between each two sliding contacts (2-4) is 90 degrees, the grounding sliding frame (2-3) is installed in the barrel-shaped cavity wall (3) through the sliding contacts (2-4) and the T-shaped sliding grooves (2-2) and is subjected to axial position adjustment, the edges of the grounding sliding frame (2-3) and the sliding contacts (2-4) are subjected to fillet treatment, 12 defect model positioning holes (2-6) are uniformly arranged on the grounding sliding frame (2-3) along the tangential direction, and the included angle of each defect model positioning hole (2-6) is 30 degrees, the defect model (2-5) is installed on a grounding sliding frame (2-3) through defect model positioning holes (2-6) in different directions and is subjected to tangential direction adjustment, a high-voltage conducting rod (2-7) is connected with a central conductor of a basin-type insulator (2-1), a spherical conducting rod end shielding cover (2-8) is arranged at the end of the high-voltage conducting rod (2-7), and the defect model (2-5) comprises a defect model fixing rod (3-1), a flat electrode (3-2), an end conductor (3-3), a defect model electrode frame (3-4), a sharp electrode (3-5), a defect model high-voltage end connecting rod (3-6) and a defect model high-voltage end sleeve (3-7); the defect model electrode frame (3-4) is made of epoxy resin, the top end of the defect model electrode frame (3-4) is provided with an end conductor (3-3) and is connected with the flat plate electrode (3-2), the end conductor (3-3) is provided with a hexagonal through hole, the defect model fixing rod (3-1) penetrates through the hexagonal through hole of the end conductor (3-3) and the defect model positioning hole (2-6), the sharp electrode (3-5) is installed at the lower end of the defect model electrode frame (3-4) and is connected with the defect model high-voltage end sleeve (3-7) through the defect model high-voltage end connecting rod (3-6), the sharp electrode (3-5) and the flat plate electrode (3-2) can initiate corona discharge, and the defect model high-voltage end sleeve (3-7) is sleeved on the high-voltage conducting rod (2-7) to realize solid discharge Now electrically connected and can slide axially.
2. The experimental device for researching the influence of the GIS discharge position on the detection of the decomposed gas as claimed in claim 1, wherein the high-voltage bushing (1) is connected with the variable-diameter end cover (2) through a basin insulator (2-1) and a matched basin insulator connecting bolt (2-12).
3. The experimental device for researching the influence of the GIS discharge position on the detection of the decomposed gas as claimed in claim 1, wherein the reducing end cap (2) is connected with the barrel-shaped cavity wall (3) through reducing end cap fixing bolts (2-13).
4. The experimental device for researching the influence of the GIS discharge position on the detection of the decomposed gas as claimed in claim 1, wherein the tail end cover plate (5) is connected with the barrel-shaped cavity wall (3) through tail end cover plate fixing bolts (2-14).
5. The experimental device for researching the influence of the GIS discharge position on the detection of the decomposed gas as claimed in claim 1, wherein the sampling valve (4) comprises a valve (2-9), a barometer (2-10) and a sampling port (2-11); the upper end of the valve (2-9) is provided with a barometer (2-10) through threads, the left side of the sampling valve (4) is provided with a sampling port (2-11), and the barometer (2-10) and the sampling port (2-11) are communicated with the gas circuit of the testing device and controlled by the valve (2-9).
6. The experimental device for researching the influence of the GIS discharge position on the detection of the decomposed gas according to claim 1, wherein the high-voltage sleeve (1), the variable-diameter end cover (2), the barrel-shaped cavity wall (3) and the basin-type insulator (2-1) are sealed through an O-shaped sealing ring.
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2021
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