CN113419145A - Real GIS three-station switch air gap discharge simulation test system device and method - Google Patents

Abstract

The invention discloses a device and a method for simulating a real GIS three-station switch air gap discharge test system, which comprises an air cavity, an infrared camera, a pulse collector, a pressure monitor interface and a switch blade, wherein a copper mesh is installed on the surface of the outer side of the air cavity, a grounding electrode and the pressure monitor interface are installed on the air cavity, an operating handle is connected with a threaded rod, the threaded rod is connected with an adjusting air gap through internal threads, a positioning sleeve is installed on the left side of the adjusting air gap, a rotating handle is installed on the positioning sleeve, a three-way switch, a closing joint and a ground wire joint are installed on a positioning frame, electrode interfaces are installed on the inner sides of the closing joint and the ground wire joint, and an installation groove is formed in the inner side of the three-way switch. The real GIS three-station switch air gap discharge simulation test system device is provided with an infrared camera capable of observing the discharge state in all directions, a shell of the device and a copper mesh are connected to a grounding electrode to be grounded together, and an electrode probe is used for puncturing a metal block to measure the potential by rotating a handle to adjust.

Description

Real GIS three-station switch air gap discharge simulation test system device and method

Technical Field

The invention relates to the technical field of high-voltage electrical tests, in particular to a test system device and a test method for simulating real GIS three-station switch air gap discharge.

Background

At present, in the field of electrical engineering, a GIS (enclosed gas insulated switchgear) three-position switch has the characteristics of compact structure, reliable connection and the like and is widely applied. The three-position switch is usually positioned in a closed air chamber at the side of an outgoing line and a bus, metal components in the area are numerous, operating mechanisms are mutually associated and complex, the three-position switch is used as an isolating switch and a fast grounding connection center, the operation is frequent, air gaps are easily generated between a metal link and an operating solid insulator, even holes exist in the solid insulator due to poor process, the defects account for 30% of the GIS equipment failure rate in operation, and GIS partial discharge and even breakdown are caused in the three-position switch air chamber.

The three-position switch and the two-position load switch represent that only the on-off position and the off-off position exist; the three position load switch indicates that it has a closed position, an open position and a grounded position. The severing and the isolation are different. The cut-off only indicates that the circuit is disconnected and the load is cut off; isolation does not only involve a cut-off state, but also indicates that the break between the power supply side and the load side is large, and a three-position switch is often used in a fully-closed combined electrical appliance (GIS) or a composite electrical appliance (PASS), and is not a separate product.

The project aims to provide a GIS three-station switch adjustable air gap discharge test system device and method, which are used for electric power scientific researchers to research and determine the characteristics of the defects, further train the practitioners to master the detection key points, and have important significance for timely discovering and processing the air gap discharge defects in a three-station switch closed air chamber in a production field.

At present, a real GIS three-station switch air gap discharge test system device and a real GIS three-station switch air gap discharge test method which can be simulated are not available at home and abroad, the invention establishes a solid GIS three-station model, opens a top plate, adds a piston type air gap discharge interval at a connecting piece, is provided with a pulse acquisition device, outputs a discharge signal from inside to outside, simultaneously monitors the internal test progress by a 360-degree infrared camera, forms a GIS three-station switch air gap discharge test system device with internal and external linkage and visual measurement double lines, and completes the monitoring and management method of a closed-loop test system.

Therefore, a real GIS three-position switch air gap discharge simulation test system device and a real GIS three-position switch air gap discharge simulation test method are provided so as to solve the problems.

Disclosure of Invention

The invention aims to provide a test system and a test method for simulating real GIS three-position switch air gap discharge, so as to solve the problem that the GIS equipment is easy to break down due to the three-position switch in the current market, which is provided by the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a test system device for simulating real GIS three-station switch air gap discharge comprises an air cavity, an infrared camera, a pulse collector, a pressure monitor interface and a switch blade, wherein a copper mesh is installed on the surface of the outer side of the air cavity, a grounding electrode and the pressure monitor interface are installed on the air cavity, a video monitor is installed above the air cavity, the infrared camera is installed on the inner side of the video monitor, an operating handle is connected with a threaded rod, the threaded rod is connected with an adjusting air gap through internal threads, the tail end of the threaded rod is connected with a piston, a positioning sleeve is installed on the left side of the adjusting air gap, a rotating handle is installed on the positioning sleeve, an electrode probe is installed on the inner side of the positioning sleeve, the pulse collector is installed below the electrode probe and is connected with a BNC-N external interface, a three-way switch, a closing joint and a ground wire joint are installed on a positioning frame, and the inner sides of the closing joint and the ground wire joint are provided with electrode interfaces, the inner side of the three-way switch is provided with a mounting groove, an adjusting gear and a switch blade are arranged in the mounting groove, and the switch blade is provided with a transmission gear.

Preferably, the air cavity is filled with SF6 gas, the copper mesh is connected with the grounding electrode and the device shell, and the grounding electrode is connected with the ground wire connector through the positioning frame.

Preferably, the video monitoring device is connected with a 360-degree infrared camera, a sealing ring is installed at the joint of the BNC-N external interface and the air cavity, and the fixed pressure air gap adopts an epoxy resin air cavity wrapping mode.

Preferably, the operating handle drives the threaded rod and the adjusting air gap to form a rotating structure, and the threaded rod drives the piston through the internal thread to form a movable structure.

Preferably, the piston is sleeved with a sealing ring, the electrode interface and the switch blade are made of copper alloy materials with high conductivity, and the positioning frame is made of insulating materials.

Preferably, the three-way switch, the closing joint and the ground joint are located on the same straight line, and the distance between the three-way switch and the closing joint and the ground joint is less than one third of the length of the switch blade.

Preferably, the adjusting gear is meshed with the transmission gear to form a fixed structure, the transmission gear drives the switch blade to form a sliding structure inside the three-way switch, and the adjusting gear is connected with an electric motor through a rotating shaft.

Preferably, the positioning sleeve and the rotary handle are fixedly connected through a clamping groove, the rotary handle forms a rotary structure on the positioning sleeve, and the rotary handle drives the threaded rod and the electrode probe to form a telescopic structure through the internal thread.

A test method for simulating real GIS three-station switch air gap discharge comprises the following steps:

A. designing and manufacturing a GIS three-station switch air gap discharge test system capable of being simulated;

B. establishing discharge of an internal fixed air gap in different states of three stations and in a virtual connection state of a metal part contact;

C. the test system is in a video monitoring and signal acquisition 'double-receiving mode', and the discharge process of the test system is monitored without dead angles.

Compared with the prior art, the invention has the beneficial effects that: the test system device simulates the air gap discharge of a real GIS three-station switch;

1. the infrared camera is arranged to observe the discharge state in all directions, the device shell and the copper mesh are connected to a grounding electrode to be grounded together, the electrode probe is used for adjusting the puncture measuring potential of the metal block through rotating the handle, so that the contact with the inside of the device is avoided, and the safety is ensured;

2. the three-way switch is provided with an adjusting gear, the adjusting gear drives a switch blade to move, switching of a switch-on position, a switch-off position and a grounding position is realized, the virtual connection state of the contact can be accurately controlled, and the smooth discharge test is ensured;

3. the operation rotating handle is arranged to adjust the adjusting air gap, the operation rotating handle drives the threaded rod to drive the piston to move through the internal thread, so that the pressure in the air cavity can be adjusted conveniently, the discharging condition under different states can be detected, and the detection range of the device is improved.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic view of the main section structure of the present invention;

FIG. 3 is a schematic view of an air gap adjusting structure according to the present invention;

FIG. 4 is a schematic view of an electrode probe according to the present invention;

fig. 5 is a schematic diagram of a three-way switch according to the present invention.

In the figure: 1. an air cavity; 2. adjusting an air gap; 3. a three-way switch; 4. monitoring a video; 5. a copper mesh; 6. a ground electrode; 7. an infrared camera; 8. a pulse collector; 9. a BNC-N external interface; 10. operating the rotating handle; 11. an electrode probe; 12. fixing a pressure air gap; 13. a metal block; 14. a closing connector; 15. a ground wire connector; 16. a positioning frame; 17. a pressure monitor interface; 18. a piston; 19. an internal thread; 20. a threaded rod; 21. an electrode interface; 22. mounting grooves; 23. an adjusting gear; 24. a switch blade; 25. a transmission gear; 26. a positioning sleeve; 27. the grip is rotated.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a test system device for simulating real GIS three-station switch air gap discharge comprises an air cavity 1, an adjusting air gap 2, a three-way switch 3, a video monitor 4, a copper mesh 5, a grounding electrode 6, an infrared camera 7, a pulse collector 8, a BNC-N external interface 9, an operating handle 10, an electrode probe 11, a fixed pressure air gap 12, a metal block 13, a closing joint 14, a ground wire joint 15, a positioning frame 16, a pressure monitor interface 17, a piston 18, an internal thread 19, a threaded rod 20, an electrode interface 21, an installation groove 22, an adjusting gear 23, a switch blade 24, a transmission tooth 25, a positioning sleeve 26 and a rotating handle 27, wherein the copper mesh 5 is arranged on the outer side surface of the air cavity 1, the grounding electrode 6 and the pressure monitor interface 17 are arranged on the air cavity 1, the video monitor 4 is arranged above the air cavity 1, the infrared camera 7 is arranged on the inner side of the video monitor 4, the operating handle 10 is connected with the threaded rod 20, the threaded rod 20 is connected with an adjusting air gap 2 through an internal thread 19, the tail end of the threaded rod 20 is connected with a piston 18, a positioning sleeve 26 is installed on the left side of the adjusting air gap 2, a rotary handle 27 is installed on the positioning sleeve 26, an electrode probe 11 is installed on the inner side of the positioning sleeve 26, a pulse collector 8 is installed below the electrode probe 11, the pulse collector 8 is connected with a BNC-N external connector 9, a three-way switch 3, a closing connector 14 and a ground wire connector 15 are installed on a positioning frame 16, an electrode connector 21 is installed on the inner sides of the closing connector 14 and the ground wire connector 15, an installation groove 22 is formed in the inner side of the three-way switch 3, an adjusting gear 23 and a switch blade 24 are arranged in the installation groove 22, and a transmission tooth 25 is formed in the switch blade 24.

The air cavity 1 is filled with SF6 gas, the copper mesh 5 is connected with the grounding electrode 6 and the device shell, and the grounding electrode 6 is connected with the ground wire connector 15 through the positioning frame 16.

The video monitoring device 4 is connected with a 360-degree infrared camera 7, a sealing ring is installed at the joint of the BNC-N external interface 9 and the air cavity 1, the fixed pressure air gap 12 adopts an epoxy resin air cavity wrapping mode, the structure is convenient for effectively observing the internal electric arc or corona discharge condition, and the normal pressure air gap discharge characteristic of the solid insulation connecting piece is simulated.

The operating handle 10 drives the threaded rod 20 and the adjusting air gap 2 to form a rotating structure, and the threaded rod 20 drives the piston 18 through the internal thread 19 to form a movable structure, so that the pressure in the air cavity 1 can be conveniently adjusted to detect the discharge condition under different states.

The piston 18 is sleeved with a sealing ring, the electrode interface 21 and the switch blade 24 are made of copper alloy materials with higher conductivity, and the positioning frame 16 is made of insulating materials, so that the sealing performance and the safety of the whole device are ensured.

The three-way switch 3, the closing joint 14 and the ground wire joint 15 are located on the same straight line, the distance between the three-way switch 3 and the closing joint 14 and the ground wire joint 15 is smaller than one third of the length of the switch blade 24, and the structure ensures that the switch blade 24 can be tightly connected with the closing joint 14 and the ground wire joint 15 and ensures good contact.

Adjusting gear 23 constitutes fixed knot with the meshing of driving gear 25 and constructs, and driving gear 25 drives switch blade 24 and constitutes sliding construction in three-way switch 3 is inside, and adjusting gear 23 is connected with electric motor through the pivot, and the regulation of switch blade 24 is realized to above-mentioned structure, is convenient for accurate control switch-on position, branch floodgate position and ground connection position's switching and control contact virtual state of connecing.

The positioning sleeve 26 and the rotary handle 27 are fixedly connected through a clamping groove, the rotary handle 27 forms a rotary structure on the positioning sleeve 26, the rotary handle 27 drives the threaded rod 20 and the electrode probe 11 to form a telescopic structure through the internal thread 19, the structure avoids the contact with the inside of the device when the electrode probe 11 is adjusted, and the safety is guaranteed.

A test method for simulating real GIS three-station switch air gap discharge comprises the following steps:

A. designing and manufacturing a simulated GIS three-station switch air gap discharge test system, wherein the system device is butted at the outer side of a section of specially designed GIS three-station switch back plate, the internal air cavity 1 has the normal pressure of 0.5MPa, the three stations can achieve three states of isolation switching-off, grounding and switching-on, and simultaneously realize virtual connection of contacts in each state;

B. the method comprises the following steps of establishing discharge of an internal fixed air gap in different states of three stations and in a virtual connection state of a metal part contact, puncturing the metal part through a metal electrode contactor to obtain an electrode potential, and mechanically operating to control an external air gap module to realize generation of different discharge pulse energies;

C. the test system is in a video monitoring 4 and signal acquisition 'double-receiving mode', the discharge process of the test system is monitored without dead angles, in order to effectively overcome electromagnetic field interference, a side-pulling copper mesh 5 is adopted outside a cavity of the device system for wrapping, and finally the test system, a discharge cathode and a shell are grounded to a total grounding electrode 6.

The working principle is as follows: when the test system device and the method for simulating the air gap discharge of the real GIS three-station switch are used, firstly, in order to meet the actual working condition that the operation of the test system is closer to the GIS equipment, a special GIS three-station interval with an independent air cavity 1 is manufactured and is butted at a high-voltage end, the three-station interval drainage metal piece can be in three working states of isolation brake-off, grounding and switch-on, the position of the metal piece can be slowly finely adjusted by comparison, the discharge pulse of the air cavity 1 when a contact is in virtual connection is simulated, the pressure is monitored by a pressure monitor, the pressure of the GIS three-station interval air cavity 1 is ensured to be consistent with the pressure in normal working conditions, reliable and stable pressure guarantee is provided for the test system, a fixed air gap with the same pressure as the atmospheric pressure is arranged on the drainage metal piece in the middle of the three stations, an epoxy resin air cavity wrapping mode is adopted, and the normal-pressure air gap discharge characteristic of a solid insulation connecting piece is simulated, in addition, a metal electrode contactor is punctured into a middle metal part to obtain an electrode potential, the electrode potential is connected with an upper polar plate of an air gap module, different pressure switching is realized by a mechanical operation device boosting an adjustable air gap, the discharge pulse characteristic of a basin-type insulator is simulated to be generated, a rotary video probe is arranged at the upper part of an air cavity 1 of the test system, the intensity of internal discharge is clearly checked through an external lens, meanwhile, a pulse acquisition period is arranged at the lower part of the air cavity 1 to effectively obtain various air gap discharge pulses of three stations, the discharge pulses are transmitted to the outside of the tank body through a universal BNC-N interface, a video monitor 4 and a signal acquisition module are arranged in a shielding sleeve to realize the simplicity and the high efficiency of a 'double receiving mode', the electromagnetic field interference is effectively overcome, a side-pulling copper mesh 5 is adopted at the outside of a cavity of the device system to wrap the device, and finally the side-pulling copper mesh 5 is grounded with a discharge cathode and a shell to a total grounding electrode 6 to simulate the voltage of a real GIS three-station switch to be connected to a power grid, operating a three-station switch to enter a virtual connection state, discharging a cavity of a three-station air cavity 1, acquiring a pulse and sending a discharge signal by a BNC-N external interface 9, further acquiring and analyzing, effectively observing an internal arc or corona discharge condition by a video monitoring 4 module, operating the three stations to be in a closing state, simulating a normal-pressure air gap discharge characteristic of a solid insulation connecting piece under the action of high voltage by a fixed pressure air gap 12 on a drainage metal piece in the middle of the three stations, operating an electrode probe 11 as a metal electrode contactor, operating a rotating handle 10 and an adjusting air gap 2, adjusting a puncture measuring potential by the electrode probe 11 through a rotating handle 27 to avoid contact with the inside of the device, adjusting the adjusting air gap 2 by the operating handle 10, driving a threaded rod 20 to drive a piston 18 to move through an internal thread 19 by the operating handle 10, simulating the generation of a basin-type insulator discharge pulse characteristic under a certain set pressure, similarly, the pulse collector 8 and the BNC-N external interface 9 send out a discharge signal to obtain and analyze, and the video monitoring module 4 effectively observes the internal arc or corona discharge condition to complete a series of works, and the content not described in detail in the present specification belongs to the prior art known to those skilled in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims (9)

1. The utility model provides a three station switch air gap discharge test system devices of real GIS of simulation, includes air cavity (1), infrared camera (7), pulse collector (8), pressure monitor interface (17) and switch blade (24), its characterized in that: the surface mounting of the outer side of the air cavity (1) is provided with a copper mesh (5), the air cavity (1) is provided with a grounding electrode (6) and a pressure monitor interface (17), a video monitor (4) is arranged above the air cavity (1), an infrared camera (7) is arranged on the inner side of the video monitor (4), the operating handle (10) is connected with a threaded rod (20), the threaded rod (20) is connected with an adjusting air gap (2) through an internal thread (19), the tail end of the threaded rod (20) is connected with a piston (18), the left side of the adjusting air gap (2) is provided with a positioning sleeve (26), the positioning sleeve (26) is provided with a rotary handle (27), the inner side of the positioning sleeve (26) is provided with an electrode probe (11), a pulse collector (8) is arranged below the electrode probe (11), and the pulse collector (8) is connected with a BNC-N external interface (9), three-way switch (3), combined floodgate joint (14) and ground wire joint (15) are installed to locating rack (16), and combined floodgate joint (14) and ground wire joint (15) inboard install electrode interface (21), mounting groove (22) have been seted up to three-way switch (3) inboard, and are provided with adjusting gear (23) and switch blade (24) in mounting groove (22), and have seted up driving tooth (25) on switch blade (24).

2. The device of claim 1 for simulating real GIS three-position switch air gap discharge test system, which is characterized in that: SF6 gas is filled in the air cavity (1), the copper mesh (5) is connected with the grounding electrode (6) and the device shell, and the grounding electrode (6) is connected with the ground wire connector (15) through the positioning frame (16).

3. The device of claim 1 for simulating real GIS three-position switch air gap discharge test system, which is characterized in that: the video monitoring device is characterized in that the video monitoring device (4) is connected with a 360-degree infrared camera (7), a sealing ring is installed at the joint of the BNC-N external interface (9) and the air cavity (1), and the fixed pressure air gap (12) adopts an epoxy resin air cavity wrapping mode.

4. The device of claim 1 for simulating real GIS three-position switch air gap discharge test system, which is characterized in that: the operating handle (10) drives the threaded rod (20) and the adjusting air gap (2) to form a rotating structure, and the threaded rod (20) drives the piston (18) through the internal thread (19) to form a movable structure.

5. The device of claim 1 for simulating real GIS three-position switch air gap discharge test system, which is characterized in that: the piston (18) is sleeved with a sealing ring, the electrode interface (21) and the switch blade (24) are both made of copper alloy materials with higher conductivity, and the positioning frame (16) is made of insulating materials.

6. The device of claim 1 for simulating real GIS three-position switch air gap discharge test system, which is characterized in that: the three-way switch (3), the closing joint (14) and the ground wire joint (15) are positioned on the same straight line, and the distance between the three-way switch (3) and the closing joint (14) and the ground wire joint (15) is less than one third of the length of the switch blade (24).

7. The device of claim 1 for simulating real GIS three-position switch air gap discharge test system, which is characterized in that: adjusting gear (23) and driving gear (25) meshing constitution fixed knot construct, and driving gear (25) drive switch blade (24) inside constitution sliding construction in three-way switch (3), adjusting gear (23) are connected with electric motor through the pivot.

8. The device of claim 1 for simulating real GIS three-position switch air gap discharge test system, which is characterized in that: the positioning sleeve (26) and the rotary handle (27) are fixedly connected through a clamping groove, the rotary handle (27) forms a rotary structure on the positioning sleeve (26), and the rotary handle (27) drives the threaded rod (20) and the electrode probe (11) to form a telescopic structure through the arrangement of the internal thread (19).

9. The method for simulating the real GIS three-position switch air gap discharge test according to the claims 1-8, comprising the following steps:

A. designing and manufacturing a GIS three-station switch air gap discharge test system capable of being simulated;

B. establishing discharge of an internal fixed air gap in different states of three stations and in a virtual connection state of a metal part contact;

C. the test system is in a video monitoring (4) and signal acquisition 'double-receiving mode', and the discharge process of the test system is monitored without dead angles.

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