CN106855449B - High-voltage vacuum circuit breaker arc extinguish chamber vacuum degree detection system based on magnetic control discharge theory - Google Patents
High-voltage vacuum circuit breaker arc extinguish chamber vacuum degree detection system based on magnetic control discharge theory Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 57
- 238000012545 processing Methods 0.000 claims abstract description 56
- 230000005684 electric field Effects 0.000 claims abstract description 44
- 239000003990 capacitor Substances 0.000 claims abstract description 24
- 238000013500 data storage Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000004880 explosion Methods 0.000 claims abstract description 5
- 150000002500 ions Chemical class 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 7
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- 238000005259 measurement Methods 0.000 description 1
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
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- G01L21/30—Vacuum gauges by making use of ionisation effects
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Abstract
Based on magnetic control theory high pressure vacuum circuit breaker explosion chamber vacuum degree detecting system that discharges, its characterized in that: the system comprises a micro-processing system (1), an electric field high-voltage generation module (2), a magnetic field coil (3), a first IGBT module (4), a second IGBT module (5), a first IGBT driving module (6), a second IGBT driving module (7), an arc extinguishing chamber (8), a magnetic field capacitor (9), a voltage detection module (10), an electric field high-voltage driving module (11), a current detection module (12), a control panel (13), a display screen (14), a display driving unit (15), a data storage module (16), a communication module (17), a printer (18) and a capacitor charging module (19), wherein the accurate detection of the vacuum degree is realized by utilizing a magnetic discharge theory, and compared with a spark metering method and a leakage current method, the system has the advantages of high detection precision, good reliability, stability and the like, and meanwhile, the long-term storage of the vacuum degree data is realized by utilizing the data storage module, so that the development foundation of the subsequent vacuum degree state evaluation technology is laid.
Description
Technical Field
The invention belongs to the technical field of vacuum degree inspection, and particularly relates to a vacuum degree detection system for an arc extinguish chamber of a high-voltage vacuum circuit breaker based on a magnetic control discharge theory.
Background
Vacuum refers to a space where gas is thin, and a state where absolute pressure is lower than normal atmospheric pressure may be referred to as a vacuum state. Depending on the vacuum pressure rangeThe vacuum degree is divided into five areas of rough vacuum, low vacuum, high vacuum, ultrahigh vacuum and extremely high vacuum in China. The pressure of the vacuum circuit breaker is 1.01X10 -2 Pa～1.33×10 -5 Pa, belongs to the region of high vacuum. As the vacuum degree of the arc extinguishing chamber is reduced, the breaking capacity of the high-voltage vacuum circuit breaker is continuously reduced, and if the breaking capacity of the high-voltage vacuum circuit breaker exceeds a certain threshold value, rated or fault current cannot be broken due to the loss of the breaking capacity of the high-voltage vacuum circuit breaker, so that the safety of a power system is seriously threatened. The vacuum degree detection of the arc extinguishing chamber of the high-voltage vacuum circuit breaker is divided into two types, namely off-line detection and on-line detection, the on-line detection has high requirements on environment, and the reliability and the stability of the detection result are low due to the limitation of the technical level. At present, the off-line detection mainly comprises a spark meter method and a leakage current method, and only can be judged qualitatively, and the detection precision is low and the reliability is poor.
Disclosure of Invention
The invention aims to:
the invention provides a vacuum degree detection system for an arc extinguish chamber of a high-voltage vacuum circuit breaker based on a magnetic control discharge theory, and aims to solve the problems existing in the past.
The technical scheme is as follows:
a vacuum degree detection system of an arc extinguishing chamber of a high-voltage vacuum circuit breaker based on a magnetic control discharge theory comprises a micro-processing system, an electric field high-voltage generation module, a magnetic field coil, a first IGBT module, a second IGBT module, a first IGBT driving module, a second IGBT driving module, an arc extinguishing chamber, a magnetic field capacitance voltage detection module, an electric field high-voltage driving module, a current detection module, a control panel, a display screen, a display driving unit, a data storage module, a communication module, a printer and a capacitor charging module, wherein the control end of the electric field high-voltage generation module is connected with the signal output end of the electric field high-voltage driving module, the output end of the electric field high-voltage generation module is connected with the dynamic and static contact of the arc extinguishing chamber through the electric field high-voltage driving module, the control end of the electric field high-voltage driving module is connected with the signal output end of the micro-processing system, the signal input end of the electric field high-voltage driving module is connected with the signal output end of the micro-processing system, the two ends of the magnetic field coil are connected with the positive and negative ends of the magnetic field capacitance through the first IGBT module, the measurement end of the voltage detection module is connected with the positive and negative ends of the magnetic field capacitance, the signal output end of the voltage detection module is connected with the positive and negative ends of the signal of the magnetic field capacitance, the signal output end of the signal detection module is connected with the signal output end of the micro-processing system, the signal output end of the IGBT driving module is connected with the signal output end of the micro-processing system, the signal output end of the micro-processing module is connected with the signal output end of the signal output module, the signal output end of the micro-processing module, and the signal output end of the micro-processing module is connected with the signal output end of the pulse module, and the pulse module is connected with the signal output end of the pulse module, the signal output end of the control panel is connected with the signal input end of the micro-processing system, the signal input end of the display screen is connected with the signal output end of the micro-processing system through the display driving unit, the signal input end of the data storage module is connected with the signal output end of the micro-processing system, the signal input end of the printer is connected with the signal output end of the micro-processing system through the communication unit, and the capacitor charging module is connected with the magnetic field capacitor.
The magnetic field coil is arranged outside the arc extinguishing chamber through a fixing frame, and the fixing frame comprises a supporting box, an upper V-shaped supporting clamp, a lower V-shaped supporting clamp and an adjusting screw; limiting slide ways are arranged at two ends of the supporting box and are strip-shaped slide ways arranged along the length direction of the supporting box;
the upper V-shaped supporting clamp comprises an upper clamping arm and an upper follower arm, and the upper clamping arm is connected with the upper follower arm through a torsion spring to form a V-shaped structure; the lower V-shaped supporting clamp comprises a lower clamping arm and a lower follower arm, and the lower clamping arm is connected with the lower follower arm through another torsion spring to form a V-shaped structure; the two torsion springs are sleeved on the movable roller, a rolling shaft is arranged in the center of the movable roller, and two ends of the rolling shaft extend into the limit slideway and move along the limit slideway when in use;
the upper follower arm is movably connected with the lower follower arm through a movable shaft, the movable shaft is connected with a pulling rod with threads, and the pulling rod penetrates through the supporting box along the direction perpendicular to the limiting slideway and is in threaded fit with the supporting box through threads;
a vertical fixing pressing piece for pressing the sensor in the vertical direction is arranged at the front part of the upper clamping arm;
a plurality of limiting grooves for inserting the vertical rods for vertically fixing the pressing sheets are formed in the upper clamping arm at one time along the length direction of the upper clamping arm.
When the high-voltage vacuum circuit breaker arc-extinguishing chamber is in an on-off state, a pulse electric field high voltage is applied between the moving contact and the fixed contact through an electric field high voltage generating module, a magnetic field coil is arranged at the outer side of the arc-extinguishing chamber, and a large current is conducted to the magnetic field coil, so that a pulse magnetic field synchronous with the high voltage is generated in the arc-extinguishing chamber, charged ions in the arc-extinguishing chamber do spiral motion under the action of the pulse strong magnetic field and the strong electric field, and collide and ionize with residual gas molecules, and the generated ion current is in proportion to the density of the residual gas, namely the vacuum degree.
In the method, after a control system is electrified, a control panel sends a detection instruction to a micro-processing system, the micro-processing system sends a control instruction to charge a magnetic field capacitor, the voltage of the magnetic field capacitor is detected through a voltage detection module and fed back to the micro-processing system, the micro-processing system compares the detected voltage value preset value, a stop instruction is sent when the detected voltage value reaches a preset value, the micro-processing system stops charging the magnetic field capacitor, the micro-processing system sends the control instruction to control an electric field high-voltage generation module and a magnetic field coil to respectively output a high-voltage pulse and a strong electric field, the arc extinguishing chamber begins to discharge under the combined action of the strong electric field and the strong magnetic field, the generated ion current is sent to the micro-processing system through a current detection module, the micro-processing system calculates to obtain the vacuum degree value of the arc extinguishing chamber of the high-voltage vacuum circuit breaker, the vacuum degree value is displayed on a display screen, and meanwhile data is stored and printed through a data storage module and a printer.
The invention provides a vacuum degree detection system for an arc extinguish chamber of a high-voltage vacuum circuit breaker based on a magnetic control discharge theory, which utilizes the magnetic discharge theory to realize accurate detection of vacuum degree, has the advantages of high detection precision, good reliability, stability and the like compared with a spark metering method and a leakage current method, and simultaneously utilizes a data storage module to realize long-term storage of vacuum degree data so as to lay a foundation for development of a follow-up vacuum degree state evaluation technology.
Description of the drawings:
FIG. 1 is a connection diagram of a vacuum degree detection system of an arc extinguishing chamber of a high-voltage vacuum circuit breaker based on a magnetic control discharge theory;
FIG. 2 is a schematic structural view of a fixing frame;
fig. 3 is an enlarged view of a portion a of fig. 2.
1. A micro-processing system; 2. an electric field high voltage generation module; 3. a magnetic field coil; 4. An IGBT module; 5. An IGBT module; 6. an IGBT driving module; 7. an IGBT driving module; 8. an arc extinguishing chamber; 9. a magnetic field capacitance; 10. a voltage detection module; 11. an electric field high voltage driving module; 12. a current detection module; 13. a control panel; 14. a display screen; 15. a display driving unit; 16. a data storage module; 17. a communication module; 18. a printer; 19. and a capacitor charging module.
The specific embodiment is as follows:
the invention provides a vacuum degree detection system of an arc extinguishing chamber of a high-voltage vacuum circuit breaker based on a magnetic control discharge theory, which comprises a micro-processing system 1, an electric field high-voltage generation module 2, a magnetic field coil 3, a first IGBT module 4, a second IGBT module 5, a first IGBT driving module 6, a second IGBT driving module 7, an arc extinguishing chamber 8, a magnetic field capacitor 9 voltage detection module 10, an electric field high-voltage driving module 11, a current detection module 12, a control panel 13, a display screen 14, a display driving unit 15, a data storage module 16, a communication module 17, a printer 18 and a capacitor charging module 19, wherein the control end of the electric field high-voltage generation module 2 is connected with the signal output end of the electric field high-voltage driving module 11, the output end of the electric field high-voltage generation module 2 is connected with the dynamic contact of the arc extinguishing chamber 8 through the electric field high-voltage driving module 11, the control end of the electric field high-voltage driving module 11 is connected with the signal output end of the micro-processing system 1, the signal input end of the electric field high-voltage driving module 11 is connected with the signal output end of the micro-processing system 1, the two ends of the magnetic field coil 3 are connected with the signal output end of the micro-processing system 1 through the positive and negative end of the IGBT module 9, the positive and negative end of the detection module 10 of the first IGBT module 9 is connected with the positive and negative end of the signal detection module 6, the positive and negative end of the signal output end of the signal detection module 5 is connected with the signal output end of the first IGBT module 6, the signal 6 of the signal detection module 5 is connected with the signal output end of the signal output module 5, and the signal input end of the micro-output module 6 is connected with the signal input end of the signal input module 6 of the signal input module, the signal input end of the second IGBT driving module 7 is respectively connected with the signal output end of the micro-processing system 1, the measuring end of the current detection module 12 is connected with the arc extinguishing chamber 8, the signal output end of the current detection module 12 is connected with the signal input end of the micro-processing system 1, the signal output end of the control panel 13 is connected with the signal input end of the micro-processing system 1, the signal input end of the display screen 14 is connected with the signal output end of the micro-processing system 1 through the display driving unit 15, the signal input end of the data storage module 16 is connected with the signal output end of the micro-processing system 1, the signal input end of the printer 18 is connected with the signal output end of the micro-processing system 1 through the communication unit 17, and the capacitor charging module 19 is connected with the magnetic field capacitor 9.
The magnetic field coil 3 is arranged outside the arc extinguishing chamber 8 through a fixing frame, and the fixing frame comprises a supporting box 111), an upper V-shaped supporting clamp, a lower V-shaped supporting clamp and an adjusting screw 888; the two ends of the supporting box 111 are provided with limiting slide ways 666, and the limiting slide ways 666 are strip-shaped slide ways arranged along the length direction of the supporting box 111;
the upper V-shaped supporting clamp comprises an upper clamping arm 333 and an upper follower arm 333-1, and the upper clamping arm 333 and the upper follower arm 333-1 are connected through a torsion spring to form a V-shaped structure; the lower V-shaped supporting clamp comprises a lower clamping arm 222 and a lower follower arm 222-1, and the lower clamping arm 222 and the lower follower arm 222-1 are connected through another torsion spring 444 to form a V-shaped structure; the two torsion springs are sleeved on the movable roller, a rolling shaft 555 is arranged in the center of the movable roller, and two ends of the rolling shaft 555 extend into the limit slide 666 and move along the limit slide 666 when in use;
the upper follower arm 333-1 is movably connected with the lower follower arm 222-1 through a movable shaft 777, the movable shaft 777 is connected with a pulling rod 888 with threads 999, and the pulling rod 888 passes through the support box 111 along the direction perpendicular to the limit slideway 666 and is in threaded fit with the support box 111 through the threads 999;
a vertical fixing presser 000 for pressing the sensor in a vertical direction is provided at a front portion of the upper clamp arm 333;
a plurality of limit grooves 001 into which the vertical rods of the vertical fixing press piece 000 are inserted are provided at one time in the length direction of the upper clamp arm 333.
When the fixing frame is used, the pulling rod 888 is screwed inwards (i.e. in the upper right direction in the figure) so that the upper clamping arm 333 and the lower clamping arm 222 are outwards opened, then the upper clamping arm 333 and the lower clamping arm 222 are respectively arranged on the upper surface and the lower surface of the tested device, the sensor is arranged at the bottom of the vertical fixing pressing piece 000, then the pulling rod 888 is screwed reversely, the upper clamping arm 333 and the lower clamping arm 222 are inwards folded and gradually clamp the tested object, the operation of tightly contacting the sensor with the tested object is completed, and the action of screwing the pulling rod 888 is repeated when the sensor is dismounted or replaced.
The plurality of limit grooves 001 are arranged, so that the positions of the vertical fixing press pieces 000 can be adjusted, the vertical fixing press pieces have better adaptability, and the positions can be adjusted according to different conditions.
Based on the working principle of a vacuum degree detection system of an arc extinguish chamber of a magnetic control discharge theory high-voltage vacuum circuit breaker: when the high-voltage vacuum circuit breaker explosion chamber 8 is in an on-off state, a pulse electric field high voltage is applied between the moving contact and the fixed contact through the electric field high voltage generation module 2, meanwhile, the magnetic field coil 3 is arranged outside the explosion chamber 8, and a large current is conducted to the magnetic field coil 8, so that a pulse magnetic field synchronous with the high voltage is generated in the explosion chamber 8. Under the action of the pulse strong magnetic field and the strong electric field, charged ions in the arc extinguishing chamber 8 do spiral motion and collide with residual gas molecules for ionization, and the generated ion current is in proportion to the residual gas density, namely the vacuum degree.
The working process of the vacuum degree detection system of the high-voltage vacuum circuit breaker arc extinguish chamber based on the magnetic control discharge theory comprises the following steps: after the control system is electrified, the control panel 13 sends a detection instruction to the micro-processing system 1, the micro-processing system 1 sends a control instruction to charge the magnetic field capacitor 9, the voltage of the magnetic field capacitor 9 is detected through the voltage detection module 10 and fed back to the micro-processing system 1, the micro-processing system 1 compares the detected voltage value preset value, and when the detected voltage value reaches a preset value, a stop instruction is sent to stop charging the magnetic field capacitor 9. The micro-processing system 1 sends a control instruction to control the electric field high-voltage generation module 2 and the magnetic field coil 3 to respectively output a high-voltage pulse and a strong electric field, the arc extinguish chamber 8 is under the combined action of the strong electric field and the strong magnetic field, the arc extinguish chamber 8 begins to discharge, the generated ion current is sent to the micro-processing system 1 through the current detection module 12, the micro-processing system 1 obtains the vacuum degree value of the arc extinguish chamber 8 of the high-voltage vacuum circuit breaker through calculation, the vacuum degree value is displayed on the display screen 14, and meanwhile, the data are stored and printed through the data storage module 16 and the printer 18.
Claims (5)
1. Based on magnetic control theory high pressure vacuum circuit breaker explosion chamber vacuum degree detecting system that discharges, its characterized in that: the system comprises a micro-processing system (1), an electric field high voltage generation module (2), a magnetic field coil (3), a first IGBT module (4), a second IGBT module (5), a first IGBT driving module (6), a second IGBT driving module (7), an arc extinguishing chamber (8), a magnetic field capacitor (9), a voltage detection module (10), an electric field high voltage driving module (11), a current detection module (12), a control panel (13), a display screen (14), a display driving unit (15), a data storage module (16), a communication module (17), a printer (18) and a capacitor charging module (19), wherein the signal input end of the electric field high voltage generation module (2) is connected with the signal output end of the electric field high voltage driving module (11), the output end of the electric field high voltage generation module (2) is connected with the movable contact of the arc extinguishing chamber (8), the control end of the electric field high voltage driving module (11) is connected with the signal output end of the micro-processing system (1), the two ends of the magnetic field coil (3) are connected with the positive and negative ends of the magnetic field capacitor (9) through the first IGBT module (4), the voltage detection module (10) is connected with the signal output end of the micro-processing system (10), the positive and negative ends of the second IGBT driving module (7) are connected with the positive and negative ends of the capacitor charging module (19) through the IGBT module (5), the signal output end of the first IGBT driving module (6) is connected with the control signal input end of the first IGBT module (4), the signal output end of the second IGBT driving module (7) is connected with the control signal input end of the second IGBT module (5), the signal input ends of the first IGBT driving module (6) and the second IGBT driving module (7) are respectively connected with the signal output end of the micro-processing system (1), the measuring end of the current detection module (12) is connected with the signal input end of the arc extinguishing chamber (8), the signal output end of the current detection module (12) is connected with the signal input end of the micro-processing system (1), the signal output end of the control panel (13) is connected with the signal input end of the micro-processing system (1), the signal input end of the display screen (14) is connected with the signal output end of the micro-processing system (1) through the display driving unit (15), the signal input end of the data storage module (16) is connected with the signal output end of the micro-processing system (1) through the printer (17), and the signal input end of the magnetic field communication module (19) is connected with the capacitor charging module (19).
2. The magnetron discharge theory-based high-voltage vacuum circuit breaker arc extinguishing chamber vacuum degree detection system according to claim 1, wherein: the magnetic field coil (3) is arranged outside the arc extinguishing chamber (8) through a fixing frame, and the fixing frame comprises a supporting box (111), an upper V-shaped supporting clamp, a lower V-shaped supporting clamp and an adjusting screw; limiting slide ways (666) are arranged at two ends of the supporting box (111), and the limiting slide ways (666) are strip-shaped slide ways arranged along the length direction of the supporting box (111);
the upper V-shaped supporting clamp comprises an upper clamping arm (333) and an upper follower arm (333-1), and the upper clamping arm (333) and the upper follower arm (333-1) are connected through a torsion spring to form a V-shaped structure; the lower V-shaped supporting clamp comprises a lower clamping arm (222) and a lower follower arm (222-1), and the lower clamping arm (222) and the lower follower arm (222-1) are connected through another torsion spring (444) to form a V-shaped structure; the two torsion springs are sleeved on the movable roller, a rolling shaft (555) is arranged in the center of the movable roller, and two ends of the rolling shaft (555) extend into the limit slide way (666) and move along the limit slide way (666) when in use;
the upper follower arm (333-1) is movably connected with the lower follower arm (222-1) through a movable shaft (777), the movable shaft (777) is connected with a pulling rod (888) with threads (999), and the pulling rod (888) penetrates through the supporting box (111) along the direction perpendicular to the limiting slide way (666) and is in threaded fit with the supporting box (111) through the threads (999);
a vertical fixing pressing piece (000) for pressing the sensor in a vertical direction is provided at the front of the upper click arm (333).
3. The magnetron discharge theory-based high-voltage vacuum circuit breaker arc extinguishing chamber vacuum degree detection system according to claim 2, wherein: a plurality of limiting grooves (001) for inserting the vertical rods of the vertical fixing press pieces (000) are sequentially arranged on the upper clamping arm (333) along the length direction of the upper clamping arm.
4. The working method of the detection system implemented by the high-voltage vacuum circuit breaker arc extinguish chamber vacuum degree detection system based on the magnetic control discharge theory is characterized in that: when an arc extinguishing chamber (8) of the high-voltage vacuum circuit breaker is in an on-off state, a pulse electric field high voltage is applied between a moving contact and a fixed contact through an electric field high voltage generating module (2), a magnetic field coil (3) is arranged at the outer side of the arc extinguishing chamber (8), and a large current is applied to the magnetic field coil (3), so that a pulse magnetic field synchronous with the high voltage is generated in the arc extinguishing chamber (8), charged ions in the arc extinguishing chamber (8) do spiral motion under the action of the pulse strong magnetic field and the strong electric field, collide with residual gas molecules and ionize, and the generated ion current is in proportion with the density of the residual gas, namely the vacuum degree.
5. The method of operation of a detection system according to claim 4, wherein: in the method, after a control system is electrified, a control panel (13) sends a detection instruction to a micro-processing system (1), the micro-processing system (1) sends a control instruction to charge a magnetic field capacitor (9), a voltage detection module (10) detects the voltage of the magnetic field capacitor (9) and feeds the voltage back to the micro-processing system (1), the micro-processing system (1) compares the detected voltage value with a preset value, a stop instruction is sent when the detected voltage value reaches the preset value, the micro-processing system (1) stops charging the magnetic field capacitor (9), the micro-processing system (1) sends the control instruction to control an electric field high-voltage generation module (2) and a magnetic field coil (3) to respectively output a high-voltage pulse and a strong electric field, so that the arc extinguishing chamber (8) starts to discharge under the combined action of the strong electric field and the strong magnetic field, the generated ion current is sent to the micro-processing system (1) through a current detection module (12), the micro-processing system (1) obtains a vacuum degree value of the high-voltage vacuum circuit breaker arc extinguishing chamber (8) through calculation, and the micro-processing system (1) is displayed on a display screen (14) and simultaneously stores and prints data through a data storage module (16) and a printer (18).
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| CN110534376A (en) * | 2019-10-09 | 2019-12-03 | 保定市鑫通电器设备有限公司 | Vacuum tube vacuum-degree monitoring device method and monitoring method in load ratio bridging switch |
| CN111982394A (en) * | 2020-08-20 | 2020-11-24 | 西门子爱克斯射线真空技术(无锡)有限公司 | Vacuum degree measuring device, method and system of X-ray tube |
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