CN112509858B - Double-break interlocking quick switch for integrated series compensation current limiting device - Google Patents
Double-break interlocking quick switch for integrated series compensation current limiting device Download PDFInfo
- Publication number
- CN112509858B CN112509858B CN202011518631.4A CN202011518631A CN112509858B CN 112509858 B CN112509858 B CN 112509858B CN 202011518631 A CN202011518631 A CN 202011518631A CN 112509858 B CN112509858 B CN 112509858B
- Authority
- CN
- China
- Prior art keywords
- vacuum arc
- extinguishing chamber
- series compensation
- fracture vacuum
- repulsion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/46—Interlocking mechanisms
- H01H33/50—Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention provides a double-break interlocking rapid switch for an integrated series compensation current limiting device and a working method thereof, and the switch is characterized in that: the repulsion mechanism comprises a first coil of a repulsion mechanism, a second coil of the repulsion mechanism, a repulsion plate, a transmission rod fixedly connected with the repulsion plate, a first insulation pull rod fixedly connected with one side of the transmission rod, a second insulation pull rod fixedly connected with the other side of the transmission rod, a first fracture vacuum arc-extinguishing chamber fixedly connected with the first insulation pull rod and a second fracture vacuum arc-extinguishing chamber fixedly connected with the second insulation pull rod. The repulsion plate drives the first fracture vacuum arc-extinguishing chamber to realize the switching-off operation and can drive the second fracture vacuum arc-extinguishing chamber to switch on the switch to realize the interlocking of the electrical structure under the action of the first coil or the second coil. The double-fracture interlocking rapid switch can economically and flexibly realize the development of a compact integrated series compensation current limiting device by connecting a series compensation branch and a current limiting branch which are formed by the fractures of the vacuum arc-extinguishing chambers in series or in parallel.
Description
Technical Field
The invention relates to the technical field of rapid vacuum switches, in particular to a double-break interlocking rapid vacuum switch for an integrated series compensation current limiting device.
Background
With the rapid development of the scale of the electric power system in China, the short-circuit current of the power grid of each voltage class rises year by year, the safe and stable operation of the electric power system and equipment is seriously influenced, and meanwhile, the reduction range of the terminal voltage of the line is easily overlarge due to the existence of the stray inductance or the distributed capacitance of the line in long-distance power transmission/distribution, and the power supply quality of the electric power system is seriously influenced. The development of the rapid switch type current limiter technology provides an economic and effective solution for limiting the short-circuit current of the power grid; meanwhile, the development of a line series compensation technology or a flexible controllable series compensation technology provides an effective solution for the lifting of the terminal voltage of the power grid line and the improvement of the power supply quality.
In addition, the traction system accelerates in both the high speed and heavy load directions. The power supply system has serious voltage loss at the tail end of a line and remarkable dynamic and thermal stability impact of short-circuit current, and particularly seriously threatens the safe and stable operation of the system and equipment in sections such as heavy-load lines, long and large ramps and the like. Under the normal operation condition, the voltage of the traction network is increased, so that the motor locomotive can safely and reliably operate; meanwhile, the impact of short-circuit current on various electrical equipment such as a traction transformer is reduced under the condition of short-circuit fault, and the key technical problems to be solved urgently are quick development and safe and stable operation of a traction power supply system.
The development of the series compensation current limiting device technology integrates the advantages of the current limiter technology and the series compensation technology, can realize the quick limitation of the short-circuit current of the system while obviously reducing the voltage loss at the tail end of the line, and is a research hotspot at home and abroad at the present stage. The existing series resonance type, saturated reactor type and other series compensation type current limiter devices control the matching of capacitive reactance and inductive reactance of the device through a power electronic switch, a quick switch or a vacuum trigger switch and the like so as to achieve the purpose of voltage compensation or current limitation, have the problems of large operation loss, high resonance overvoltage, low short-circuit current limiting rate and the like respectively, and are difficult to realize large-scale manufacturing and large-scale popularization.
The fast vacuum switch type series compensation and current limiting device can provide an effective technical scheme for solving the problems, however, the existing fast switch type series compensation current limiting device still lacks a fast vacuum switch product with double-fracture interlocking. Patents CN201611260519.9 and CN201810113010.4 propose integrated series compensation current limiting devices based on a fast vacuum switch respectively for the problems existing in the past series compensation and current limiting devices, and the fast vacuum switch adopted by the devices is a single-break switch; patent CN201810058287.1 proposes an interlocking vacuum switch and a series compensation current limiting device and method applied thereto, the interlocking vacuum switch adopted is a three-station vacuum arc-extinguishing chamber, and experimental studies show that a movable conductive ring and a movable auxiliary contact arranged inside the arc-extinguishing chamber are easily damaged in the fast switching on/off operation process.
Disclosure of Invention
In order to solve the problems, the invention provides a double-break interlocking rapid switch for an integrated series compensation current limiting device, which solves the problems that a power electronic switch type series compensation current limiting device is large in operation loss, a series resonance type series compensation current limiting device is high in resonance overvoltage, the short-circuit current limiting rate of a saturated reactor type series compensation current limiting device is difficult to improve and the like on one hand, and on the other hand, the double-break interlocking rapid vacuum switch can efficiently utilize the electromagnetic driving force of a rapid repulsion mechanism on the premise of not increasing an additional driving coil and an energy storage device, so that the electrical and structural interlocking of two vacuum breaks is realized.
In order to achieve the purpose, the invention adopts the following technical scheme:
the double-break interlocking fast switch for the integrated series compensation current limiting device comprises a mechanism box, a first coil of a repulsion mechanism, a second coil of the repulsion mechanism, a repulsion plate, a transmission rod, a first insulating pull rod, a second insulating pull rod, a first fracture vacuum arc-extinguishing chamber and a second fracture vacuum arc-extinguishing chamber, wherein the first coil of the repulsion mechanism, the second coil of the repulsion mechanism and the repulsion plate are arranged in the mechanism box; under the action of a first coil of the repulsion mechanism or a second coil of the repulsion mechanism, the repulsion plate drives the transmission rod, the first insulating pull rod and the second insulating pull rod to realize the opening operation of the first fracture vacuum arc-extinguishing chamber and simultaneously drives the closing operation of the second fracture vacuum arc-extinguishing chamber to realize the electrical interlocking function;
the first insulation pull rod and the first fracture vacuum arc-extinguishing chamber are arranged in the first insulation sleeve, the static end of the first fracture vacuum arc-extinguishing chamber is fixedly and electrically connected with the first sleeve wire inlet flange, and the movable end of the first fracture vacuum arc-extinguishing chamber is fixedly and electrically connected with the first sleeve wire outlet flange through flexible connection; the first insulating sleeve is fixedly connected with the mechanism box through a first supporting sleeve; the second insulation pull rod and the second fracture vacuum arc-extinguishing chamber are arranged in the second insulation sleeve, the static end of the second fracture vacuum arc-extinguishing chamber is fixedly and electrically connected with the second sleeve wire inlet flange, the movable end of the second fracture vacuum arc-extinguishing chamber is fixedly and electrically connected with the second sleeve wire outlet flange through flexible connection, and the second insulation sleeve is fixedly connected with the mechanism box through the second support sleeve;
the first insulating sleeve is connected with the first supporting sleeve, the first sleeve inlet flange and the first sleeve outlet flange in a sealing manner; the first support sleeve is connected with the mechanism box in a sealing manner; similarly, the second insulating sleeve is connected with the second supporting sleeve, the second sleeve inlet flange and the second sleeve outlet flange in a sealing manner; the second support sleeve is connected with the mechanism box in a sealing manner;
the switching-on or switching-off holding force of the first fracture vacuum arc-extinguishing chamber or the second fracture vacuum arc-extinguishing chamber is provided by a bistable spring fixed on the mechanism box through a connecting rod and a transmission rod which are rotationally connected with the bistable spring. A hollow buffer and a hollow stopper are coaxially arranged on the first coil of the repulsion mechanism;
the mechanism box is connected with the double-break interlocking quick switch control box through an insulating support sleeve. The first coil of the repulsion mechanism, the second coil of the repulsion mechanism and a connecting lead of the mechanism controller are arranged in the insulating support sleeve; the first energy storage capacitor, the second energy storage capacitor and the mechanism controller are arranged in the switch control box.
The first fracture vacuum arc-extinguishing chamber and the current-limiting component are connected in series to form a current-limiting branch, the second fracture vacuum arc-extinguishing chamber and the series compensation component can be connected in series to form a series compensation branch, and then the current-limiting branch and the series compensation branch are connected in parallel to form an integrated series compensation current-limiting device; when the system normally operates, the first fracture vacuum arc-extinguishing chamber keeps a brake-separating state, the second fracture vacuum arc-extinguishing chamber keeps a switch-on state, and the integrated series compensation current-limiting device works in a low-loss series compensation operation state; when the system has short-circuit fault, the first fracture vacuum arc-extinguishing chamber executes closing operation, the second fracture vacuum arc-extinguishing chamber executes breaking operation, and the integrated series compensation current-limiting device works in a current-limiting operation state;
meanwhile, the first fracture vacuum arc-extinguishing chamber and the current-limiting assembly are connected in parallel to form a current-limiting branch, the second fracture vacuum arc-extinguishing chamber and the series compensation assembly are connected in parallel to form a series compensation branch, and then the current-limiting branch and the series compensation branch are connected in series to form an integrated series compensation current-limiting device; when the system normally operates, the first fracture vacuum arc-extinguishing chamber keeps a switching-on state, the second fracture vacuum arc-extinguishing chamber keeps a switching-off state, and the integrated series compensation current limiting device works in a low-loss series compensation operation state; when the system has short-circuit fault, the first fracture vacuum arc-extinguishing chamber executes the breaking state, the second fracture vacuum arc-extinguishing chamber executes the closing operation, and the integrated series compensation current-limiting device works in the current-limiting operation state.
The switching-on or switching-off holding force of the first fracture vacuum arc-extinguishing chamber or the second fracture vacuum arc-extinguishing chamber is provided by a bistable spring fixed on the mechanism box through a connecting rod and a transmission rod which are rotationally connected; the electromagnetic repulsion force generated by the repulsion mechanism first coil to the repulsion plate is provided by a mechanism controller connected with the repulsion mechanism first coil through the control discharge of the first energy storage capacitor to the repulsion mechanism first coil; the electromagnetic repulsion force generated by the repulsion mechanism second coil to the repulsion plate is provided by the mechanism controller through the control discharge of the second energy storage capacitor to the repulsion mechanism second coil.
When the repulsion plate moves to be close to the first coil of the repulsion mechanism or the second coil of the repulsion mechanism, the movement speed is reduced through the hollow buffer, and meanwhile, the repulsion plate is prevented from damaging the first coil of the repulsion mechanism or the second coil of the repulsion mechanism through the hollow limiter.
Considering the requirement of the system on the rapidity of short-circuit current limitation, when an integrated series compensation current limiting device topological scheme formed by connecting a current limiting branch and a series compensation branch in parallel is adopted, the executed closing operation of a first fracture vacuum arc-extinguishing chamber connected with a current limiting assembly has a higher speed characteristic than the executed breaking operation of the first fracture vacuum arc-extinguishing chamber, and the speed characteristic can be realized by adjusting an included angle alpha between a connecting rod and a transmission rod when the first fracture vacuum arc-extinguishing chamber is in a brake-off state so as to enable the included angle alpha to be larger than an included angle beta between the connecting rod and the transmission rod when the first fracture vacuum arc-extinguishing chamber is in a switch-on state; when the topological scheme of the integrated series compensation current limiting device formed by connecting the current limiting branch and the series compensation branch in series is adopted, the breaking operation executed by the first fracture vacuum arc-extinguishing chamber connected with the current limiting assembly in parallel has higher speed characteristic than the closing operation executed by the first fracture vacuum arc-extinguishing chamber, and the speed characteristic can be realized by adjusting the included angle alpha between the connecting rod and the transmission rod when the first fracture vacuum arc-extinguishing chamber is in a breaking state so as to enable the included angle alpha to be smaller than the included angle beta between the connecting rod and the transmission rod when the first fracture vacuum arc-extinguishing chamber is in a closing state.
The included angle alpha between the connecting rod and the transmission rod or the included angle beta between the connecting rod and the transmission rod is closely related to the ratio of the length l of the connecting rod to the switching-on/off stroke s of the first fracture vacuum arc-extinguishing chamber, and the following relational expression is satisfied:
in the formula, d is the distance from the central line of the bistable spring to the connecting center point of the connecting rod and the transmission rod when the first fracture vacuum arc-extinguishing chamber is in a closing state.
The invention provides a double-break interlocking rapid vacuum switch for an integrated series compensation current limiting device and a working method thereof, which have the advantages that the problems of large operation loss of a power electronic switch type series compensation current limiting device, high resonance overvoltage of a series resonance type series compensation current limiting device, difficulty in improving the short-circuit current limiting rate of a saturated reactor type series compensation current limiting device and the like are solved, and on the other hand, the electromagnetic driving force of a rapid repulsion mechanism can be efficiently utilized to realize the electrical and structural interlocking of two vacuum breaks on the premise of not increasing additional driving coils and energy storage devices. In addition, the double-break interlocking rapid vacuum switch is easy to realize the electrical series-parallel connection of the current-limiting branch and the series compensation branch, provides a basis for economically and flexibly realizing the development of the compact integrated series compensation current-limiting device, and is more convenient for the large-scale manufacture and the large-scale popularization of the integrated series compensation current-limiting device.
Drawings
Fig. 1 is a schematic structural view of a double-break interlocking rapid vacuum switch for an integrated series compensation current limiting device.
Fig. 2 is an electrical topological diagram of a double-break interlocking fast switching integrated series compensation current limiting device with a series compensation branch and a current limiting branch connected in parallel.
Fig. 3 is an electrical topological diagram of a double-break interlocking fast switching integrated series compensation current limiting device in which a series compensation branch and a current limiting branch are connected in series.
Fig. 4 is a schematic diagram of an included angle between a connecting rod and a transmission rod when a vacuum arc extinguish chamber needs to perform closing operation and needs higher speed characteristic than that of breaking operation.
Detailed Description
The following takes a specific embodiment of a 31.5kV double-break interlocking fast switch as an example, and further introduces the double-break interlocking fast switch for the integrated series compensation current limiting device provided by the invention with reference to the accompanying drawings.
Fig. 1 shows a 31.5kV double-break interlocking fast vacuum switch for an integrated series compensation current limiting device, which comprises a mechanism box 105, a first coil 101 of a repulsion mechanism, a second coil 102 of the repulsion mechanism and a repulsion disc 103 which are arranged in the mechanism box 105, a transmission rod 104 fixedly connected with the repulsion disc, a first insulating pull rod 201 fixedly connected with one side of the transmission rod 104, a second insulating pull rod 301 fixedly connected with the other side of the transmission rod 104, a first break vacuum arc-extinguishing chamber 202 fixedly connected with the first insulating pull rod 201, and a second break vacuum arc-extinguishing chamber 302 fixedly connected with the second insulating pull rod 301. Under the action of the first coil 101 or the second coil 102 of the repulsion mechanism, the repulsion plate 103 drives the transmission rod 104, the first insulation pull rod 201 and the second insulation pull rod 301 to realize the switching-off operation of the first vacuum interrupter 202, and simultaneously can drive the switching-on operation of the second vacuum interrupter 302 to realize the interlocking structure of the electrical performance.
Typical structural and electrical parameters of the components of the 31.5kV double break interlocking fast switch shown in fig. 1 are as follows: the first fracture vacuum arc-extinguishing chamber 202 and the first fracture vacuum arc-extinguishing chamber 302 adopt commercial vacuum arc-extinguishing chambers with rated voltage of 40.5kV, rated current of 2500A and rated short-circuit breaking current of 31.5kA, and the rated contact opening distance in the opening state of the commercial vacuum arc-extinguishing chambers is 20 mm; the first coil 101 and the second coil 201 of the repulsion mechanism are prepared by adopting an epoxy pouring process, and the outer diameter of the first coil is 220mm, the inner diameter of the first coil is 80mm, and the height of the first coil is 15 mm; the repulsion plate 103 and the transmission rod 104 are made of modulated aluminum alloy materials, and the outer diameter of the repulsion plate is 220 mm; the mechanism box 105 is made of cast aluminum, and is internally provided with a first coil 101 of a repulsion mechanism, a second coil 201 of the repulsion mechanism, a repulsion plate 103, a bistable spring 105 and other components. The first insulating pull rod 201 and the second insulating pull rod 301 are made of insulating rubber dipping tubes with the diameter phi of 50mm and the length of 450 mm; the first insulating sleeve 402 and the second insulating sleeve 502 are silicon rubber insulating sleeves with rated voltage of 40.5 kV. The first insulation pull rod 201 and the first fracture vacuum arc-extinguishing chamber 202 are arranged inside the first insulation sleeve 402, the static end of the first fracture vacuum arc-extinguishing chamber 202 is fixedly and electrically connected with a first sleeve wire inlet flange 401, the movable end of the first fracture vacuum arc-extinguishing chamber 202 is fixedly and electrically connected with a first sleeve wire outlet flange 404 through a first flexible connection 403, and the first insulation sleeve 402 is fixedly connected with the mechanism box 105 through a first support sleeve 405; the second insulating pull rod 301 and the second fracture vacuum arc-extinguishing chamber 302 are arranged inside the second insulating sleeve 502, the static end of the second fracture vacuum arc-extinguishing chamber 302 is fixedly and electrically connected with the second sleeve wire inlet flange 501, the movable end of the second fracture vacuum arc-extinguishing chamber 302 is fixedly and electrically connected with the second sleeve wire outlet flange 504 through a second flexible connection 503, and the second insulating sleeve 502 is fixedly connected with the mechanism box 105 through a second supporting sleeve 505. In order to meet the waterproof requirement of outdoor application, the first insulating sleeve 402 is fixedly connected with the first supporting sleeve 405, the first sleeve inlet flange 401 and the first sleeve outlet flange 404 in an O-ring sealing manner; similarly, the second insulating sleeve 502 is connected with the second supporting sleeve 505, the second sleeve inlet flange 501 and the second sleeve outlet flange 504 in a sealing manner by adopting O-shaped rings; the connection of the first support sleeve 405 and the second support sleeve 505 to the mechanism housing 105 is also sealed with respective O-rings.
In order to ensure the reliable action and maintenance of the integrated series compensation current limiting device, the closing or opening maintaining force of the first vacuum interrupter 202 or the second vacuum interrupter 302 is provided by a bistable spring 107 fixed on the mechanism box 105 through a connecting rod 106 and a transmission rod 104 which are rotatably connected. The bistable spring component adopts an A series of standardized disc spring components with the outer diameter phi of 45, and each disc spring adopts a series connection mode. When the double-break interlocking fast vacuum switch is operated, when the repulsion plate 103 moves to be close to the first coil 101 or the second coil 102 of the repulsion mechanism, in order to prevent the repulsion plate 103 from impacting and colliding the first coil 101 or the second coil 102 of the repulsion mechanism, the movement speed of the repulsion plate is reduced through the hollow buffer 108 coaxially arranged with the first coil 101 of the repulsion mechanism, and meanwhile, the hollow stopper 109 coaxially arranged with the first coil 101 of the repulsion mechanism is used for preventing the repulsion plate 103 from impacting and colliding the first coil 101 or the second coil 102 of the repulsion mechanism. In this embodiment, finally, when the first vacuum interrupter 202 or the second vacuum interrupter 302 is kept in a closing state, the air gaps between the repulsion plate and the first coil 101 and between the repulsion plate and the second coil 102 of the repulsion mechanism are respectively 1.0 mm.
The double break interlocking fast vacuum switch shown in fig. 1, the mechanism box 105 and the first insulating sleeve 402 and the second insulating sleeve 502 fixedly connected with the mechanism box are connected with the switch control box 602 through the 40.5kV insulating support sleeve 601, so as to realize high voltage isolation. Wherein, the connection wires of the first coil 101 and the second coil 102 of the repulsion mechanism and the mechanism controller 110 are arranged inside the insulating support sleeve 601; the first energy storage capacitor 112, the second energy storage capacitor 111 and the mechanism controller 110 are disposed inside the switch control box 602. When the fracture interlocking fast vacuum switch is operated, the electromagnetic repulsion of the first coil 101 of the repulsion mechanism to the repulsion plate 103 is realized by the mechanism controller 110 through discharging the first energy storage capacitor 112. The electromagnetic repulsion of the repulsion mechanism second coil 102 against the repulsion disc 103 is achieved by the mechanism controller 110 through the discharge of the second energy storage capacitor 111.
Fig. 2 shows an electrical topology of a double-break interlocking fast switching type integrated series compensation current limiting device in which a series compensation branch and a current limiting branch are connected in parallel, wherein a first break vacuum interrupter 202 and a second break vacuum interrupter 302 are 31.5kV double-break interlocking fast vacuum switches provided by the present invention. The first fracture vacuum arc-extinguishing chamber 202 and the current-limiting component 701 are connected in series to form a current-limiting branch, the second fracture vacuum arc-extinguishing chamber 302 and the series compensation component 702 are connected in series to form a series compensation branch, and then the current-limiting branch and the series compensation branch are connected in parallel to form an integrated series compensation current-limiting device. When the system normally operates, the first fracture vacuum arc-extinguishing chamber 202 keeps a brake-separating state, the second fracture vacuum arc-extinguishing chamber 302 keeps a brake-closing state, and the integrated series compensation current-limiting device works in a low-loss series compensation operation state; when the system has a short-circuit fault, the first fracture vacuum arc-extinguishing chamber 202 executes a closing operation, the second fracture vacuum arc-extinguishing chamber 302 executes a breaking operation, and the integrated series compensation current limiting device works in a current limiting operation state.
Fig. 3 shows an electrical topology of a double-break interlocking fast switching type integrated series compensation current limiting device in which a series compensation branch and a current limiting branch are connected in series, and similarly, the first break vacuum interrupter 202 and the second break vacuum interrupter 302 are the 31.5kV double-break interlocking fast vacuum switch provided by the present invention. The first fracture vacuum arc-extinguishing chamber 202 can be connected with the current-limiting component 701 in parallel to form a current-limiting branch, the second fracture vacuum arc-extinguishing chamber 302 can be connected with the series compensation component 702 in parallel to form a series compensation branch, and then the current-limiting branch is connected with the series compensation branch in series to form an integrated series compensation current-limiting device. When the system normally operates, the first fracture vacuum arc-extinguishing chamber 202 keeps a switching-on state, the second fracture vacuum arc-extinguishing chamber 302 keeps a switching-off state, and the integrated series compensation current limiting device works in a low-loss series compensation operation state; when the system has a short-circuit fault, the first fracture vacuum arc-extinguishing chamber 202 executes a breaking state, the second fracture vacuum arc-extinguishing chamber 302 executes a closing operation, and the integrated series compensation current-limiting device works in a current-limiting operation state.
Considering the requirement of the system on the rapidity of short-circuit current limitation, when an integrated series compensation current limiting device topological scheme formed by connecting a current limiting branch and a series compensation branch in parallel is adopted, the closing operation executed by the first fracture vacuum arc-extinguishing chamber 202 has a higher speed characteristic than the breaking operation executed by the closing operation; when the topology scheme of the integrated series compensation current limiting device formed by connecting the current limiting branch and the series compensation branch in series is adopted, the breaking operation executed by the first fracture vacuum arc-extinguishing chamber 202 has a higher speed characteristic than the closing operation executed by the first fracture vacuum arc-extinguishing chamber. Under different integrated series compensation current limiting device schemes, the first fracture vacuum arc-extinguishing chamber 202 has higher speed characteristics required by closing or breaking, and can provide different acting forces during the closing or breaking process of the bistable spring 107 by adjusting the initial included angle between the connecting rod 106 and the transmission rod 104, so that the requirements of high closing speed characteristics or high breaking speed characteristics are finally met.
Fig. 4 is a schematic diagram showing an included angle between a connecting rod and a transmission rod when a closing operation of the vacuum arc-extinguishing chamber needs to be performed and a higher speed characteristic is needed compared with a breaking operation. When the first breaking vacuum interrupter 202 is in the opening state, an included angle α between the connecting rod 106 and the transmission rod 104 needs to be larger than an included angle β between the connecting rod 106 and the transmission rod 104 when the first breaking vacuum interrupter 202 is in the closing state. The angle α or the angle β is closely related to the ratio of the length of the connecting rod 106 and the opening distance of the first vacuum interrupter 202. For this embodiment, the length of the connecting rod 106 is selected to be 60mm, the opening distance of the first interrupter 602 is 20mm, and the distance from the center line position of the bistable spring 107 to the closing position of the first interrupter is 15 mm. Therefore, when an integrated series compensation current limiting device topological scheme formed by connecting the current limiting branch and the series compensation branch in parallel is adopted, the included angle alpha is 85 degrees, and the included angle beta is 75.5 degrees. Similarly, when the first breaking vacuum interrupter 202 requires a higher breaking operation speed characteristic than the closing operation, the included angle α needs to be smaller than the included angle β.
Claims (5)
1. Integration string benefit current-limiting device is with two break interlocking fast switch, its characterized in that: the mechanism comprises a mechanism box (105), a first coil (101) of a repulsion mechanism, a second coil (102) of the repulsion mechanism and a repulsion disc (103) which are arranged in the mechanism box (105), a transmission rod (104) fixedly connected with the repulsion disc, a first insulating pull rod (201) fixedly connected with one side of the transmission rod (104), a second insulating pull rod (301) fixedly connected with the other side of the transmission rod (104), a first fracture vacuum arc-extinguishing chamber (202) fixedly connected with the first insulating pull rod (201), and a second fracture vacuum arc-extinguishing chamber (302) fixedly connected with the second insulating pull rod (301); under the action of a first coil (101) or a second coil (102) of the repulsion mechanism, the repulsion plate (103) drives the transmission rod (104), the first insulating pull rod (201) and the second insulating pull rod (301) to realize the opening operation of the first fracture vacuum arc-extinguishing chamber (202), and simultaneously drives the second fracture vacuum arc-extinguishing chamber (302) to close, so that the electrical interlocking function is realized;
the first insulation pull rod (201) and the first fracture vacuum arc-extinguishing chamber (202) are arranged inside the first insulation sleeve (402), the static end of the first fracture vacuum arc-extinguishing chamber (202) is fixedly and electrically connected with the first sleeve wire inlet flange (401), and the movable end of the first fracture vacuum arc-extinguishing chamber (202) is fixedly and electrically connected with the first sleeve wire outlet flange (404) through the first flexible connection (403); the first insulating sleeve (402) is fixedly connected with the mechanism box (105) through a first supporting sleeve (405); the second insulation pull rod (301) and the second fracture vacuum arc-extinguishing chamber (302) are arranged in the second insulation sleeve (502), the static end of the second fracture vacuum arc-extinguishing chamber (302) is fixedly and electrically connected with the second sleeve wire inlet flange (501), the movable end of the second fracture vacuum arc-extinguishing chamber (302) is fixedly and electrically connected with the second sleeve wire outlet flange (504) through a second flexible connection (503), and the second insulation sleeve (502) is fixedly connected with the mechanism box (105) through a second support sleeve (505);
the first insulating sleeve (402) is connected with the first supporting sleeve (405), the first sleeve inlet flange (401) and the first sleeve outlet flange (404) in a sealing manner; the connection between the first support sleeve (405) and the mechanism box (105) adopts sealing connection; similarly, the second insulating sleeve (502) is connected with the second supporting sleeve (505), the second sleeve wire inlet flange (501) and the second sleeve wire outlet flange (504) in a sealing manner; the connection between the second support sleeve (505) and the mechanism box adopts sealing connection;
the closing or opening holding force of the first fracture vacuum arc-extinguishing chamber (202) or the second fracture vacuum arc-extinguishing chamber (302) is provided by a bistable spring (107) fixed on a mechanism box (105) through a connecting rod (106) and a transmission rod (104) which are rotationally connected with the bistable spring; a hollow buffer (108) and a hollow stopper (109) are coaxially arranged on the first coil (101) of the repulsion mechanism;
the mechanism box (105) is connected with a double-break interlocking quick switch control box (602) through an insulating support sleeve (601); the first coil (101) of the repulsion mechanism, the second coil (102) of the repulsion mechanism and a connecting lead of the mechanism controller (110) are arranged in an insulating support sleeve (601); the first energy storage capacitor (112), the second energy storage capacitor (111) and the mechanism controller (110) are arranged in the switch control box (602);
the first fracture vacuum arc-extinguishing chamber (202) is connected with the current-limiting component (701) in series to form a current-limiting branch, the second fracture vacuum arc-extinguishing chamber (302) can be connected with the series compensation component (702) in series to form a series compensation branch, and then the current-limiting branch is connected with the series compensation branch in parallel to form an integrated series compensation current-limiting device; when the system normally operates, the first fracture vacuum arc-extinguishing chamber (202) keeps a brake-separating state, the second fracture vacuum arc-extinguishing chamber (302) keeps a switch-on state, and the integrated series compensation current-limiting device works in a low-loss series compensation operation state; when a system has a short-circuit fault, the first fracture vacuum arc-extinguishing chamber (202) executes closing operation, the second fracture vacuum arc-extinguishing chamber (302) executes breaking operation, and the integrated series compensation current-limiting device works in a current-limiting operation state;
meanwhile, the first fracture vacuum arc-extinguishing chamber (202) is connected with the current-limiting assembly (701) in parallel to form a current-limiting branch, the second fracture vacuum arc-extinguishing chamber (302) is connected with the series compensation assembly (702) in parallel to form a series compensation branch, and then the current-limiting branch is connected with the series compensation branch in series to form an integrated series compensation current-limiting device; when the system normally operates, the first fracture vacuum arc-extinguishing chamber (202) keeps a switching-on state, the second fracture vacuum arc-extinguishing chamber (302) keeps a switching-off state, and the integrated series compensation current limiting device works in a low-loss series compensation operation state; when the system has short-circuit fault, the first fracture vacuum arc-extinguishing chamber (202) executes the breaking state, the second fracture vacuum arc-extinguishing chamber (302) executes the closing operation, and the integrated series compensation current-limiting device works in the current-limiting operation state.
2. The integrated double-break interlocking fast switch for the series compensation current-limiting device according to claim 1, characterized in that: the electromagnetic repulsion force generated by the first coil (101) of the repulsion mechanism to the repulsion disc (103) is provided by a mechanism controller (110) connected with the first coil (101) of the repulsion mechanism through the controlled discharge of the first energy storage capacitor (112) to the first coil (101) of the repulsion mechanism; the electromagnetic repulsion force generated by the repulsion mechanism second coil (102) to the repulsion plate (103) is provided by the mechanism controller (110) through the control discharge of the second energy storage capacitor (111) to the repulsion mechanism second coil (102).
3. The integrated double-break interlocking fast switch for the series compensation current limiting device and the working method thereof according to claim 1 are characterized in that: when the repulsion plate (103) moves to be close to the first coil (101) or the second coil (102) of the repulsion mechanism, the movement speed is reduced through the hollow buffer (108), and meanwhile, the impact of the repulsion plate (103) on the first coil (101) or the second coil (102) of the repulsion mechanism is prevented from being damaged through the hollow stopper (109).
4. The integrated double-break interlocking fast switch for the series compensation current-limiting device according to claim 1, characterized in that: considering the requirement of the system on the rapidity of short-circuit current limitation, when an integrated series compensation current limiting device topological scheme formed by connecting a current limiting branch and a series compensation branch in parallel is adopted, the closing operation executed by a first fracture vacuum arc-extinguishing chamber (202) connected in series with a current limiting component (701) has a higher speed characteristic than the opening operation executed by the first fracture vacuum arc-extinguishing chamber, and the speed characteristic is realized by adjusting an included angle alpha between a connecting rod (106) and a transmission rod (104) when the first fracture vacuum arc-extinguishing chamber (202) is in a switching-off state, so that the included angle alpha is larger than an included angle beta between the connecting rod (106) and the transmission rod (104) when the first fracture vacuum arc-extinguishing chamber (202) is in a switching-on state; when an integrated series compensation current limiting device topological scheme formed by connecting a current limiting branch and a series compensation branch in series is adopted, a breaking operation executed by a first fracture vacuum arc-extinguishing chamber (202) connected with a current limiting assembly (701) in parallel has higher speed characteristics than a closing operation executed by the first fracture vacuum arc-extinguishing chamber, and the speed characteristics are realized by adjusting an included angle alpha between a connecting rod (106) and a transmission rod (104) when the first fracture vacuum arc-extinguishing chamber (202) is in a breaking state so as to enable the included angle alpha to be smaller than an included angle beta between the connecting rod (106) and the transmission rod (104) when the first fracture vacuum arc-extinguishing chamber (202) is in a closing state.
5. The integrated double-break interlocking fast switch for the series compensation current-limiting device of claim 4, wherein: an included angle alpha between the connecting rod (106) and the transmission rod (104) or an included angle beta between the connecting rod (106) and the transmission rod (104) is closely related to the ratio of the length l of the connecting rod (106) to the switching-on/off stroke s of the first fracture vacuum arc-extinguishing chamber (202), and the following relational expression is satisfied:
wherein d is the distance from the central line of the bistable spring (107) to the connecting center point of the connecting rod (106) and the transmission rod (104) when the first fracture vacuum arc-extinguishing chamber is in a closing state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011518631.4A CN112509858B (en) | 2020-12-21 | 2020-12-21 | Double-break interlocking quick switch for integrated series compensation current limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011518631.4A CN112509858B (en) | 2020-12-21 | 2020-12-21 | Double-break interlocking quick switch for integrated series compensation current limiting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112509858A CN112509858A (en) | 2021-03-16 |
| CN112509858B true CN112509858B (en) | 2021-10-19 |
Family
ID=74922795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011518631.4A Active CN112509858B (en) | 2020-12-21 | 2020-12-21 | Double-break interlocking quick switch for integrated series compensation current limiting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112509858B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117498284B (en) * | 2023-10-26 | 2024-04-05 | 武汉大学 | Series compensation capacitor device based on short-circuit fault current intelligent self-driving |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5466902A (en) * | 1993-11-23 | 1995-11-14 | Abb Power T&D Company Inc. | Switch operator and interlock mechanism |
| CN201282091Y (en) * | 2008-10-28 | 2009-07-29 | 国网武汉高压研究院 | High voltage and ultra-high voltage high-current circuit breaker |
| CN203165794U (en) * | 2013-04-01 | 2013-08-28 | 四川华仪电器有限公司 | Fast dual-power transfer switch |
| CN105551882A (en) * | 2015-12-25 | 2016-05-04 | 大连理工大学 | Horizontally-arranged DC vacuum circuit breaker based on linkage current transfer |
| CN106655132A (en) * | 2016-12-30 | 2017-05-10 | 安徽徽电科技股份有限公司 | Series compensation current-limiting integrated device |
| CN108133862A (en) * | 2018-01-19 | 2018-06-08 | 西安交通大学 | A kind of series compensation type current-limiting apparatus and method for interlocking vacuum switch and application |
| CN108199361A (en) * | 2018-02-05 | 2018-06-22 | 安徽徽电科技股份有限公司 | A kind of high pressure self-shield string mends current limiting system |
| CN208796900U (en) * | 2018-08-29 | 2019-04-26 | 浙江紫光电器有限公司 | A kind of switching acceleration mechanism of vacuum circuit breaker |
| CN110085475A (en) * | 2019-05-14 | 2019-08-02 | 上海电力学院 | Vacuum interrupter Double-coil type structure of contact terminal in mechanical high-voltage dc circuit breaker |
| CN111490518A (en) * | 2020-04-20 | 2020-08-04 | 华电智网（天津）科技有限公司 | Hybrid energy-saving high-speed current limiting device |
-
2020
- 2020-12-21 CN CN202011518631.4A patent/CN112509858B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5466902A (en) * | 1993-11-23 | 1995-11-14 | Abb Power T&D Company Inc. | Switch operator and interlock mechanism |
| CN201282091Y (en) * | 2008-10-28 | 2009-07-29 | 国网武汉高压研究院 | High voltage and ultra-high voltage high-current circuit breaker |
| CN203165794U (en) * | 2013-04-01 | 2013-08-28 | 四川华仪电器有限公司 | Fast dual-power transfer switch |
| CN105551882A (en) * | 2015-12-25 | 2016-05-04 | 大连理工大学 | Horizontally-arranged DC vacuum circuit breaker based on linkage current transfer |
| CN106655132A (en) * | 2016-12-30 | 2017-05-10 | 安徽徽电科技股份有限公司 | Series compensation current-limiting integrated device |
| CN108133862A (en) * | 2018-01-19 | 2018-06-08 | 西安交通大学 | A kind of series compensation type current-limiting apparatus and method for interlocking vacuum switch and application |
| CN108199361A (en) * | 2018-02-05 | 2018-06-22 | 安徽徽电科技股份有限公司 | A kind of high pressure self-shield string mends current limiting system |
| CN208796900U (en) * | 2018-08-29 | 2019-04-26 | 浙江紫光电器有限公司 | A kind of switching acceleration mechanism of vacuum circuit breaker |
| CN110085475A (en) * | 2019-05-14 | 2019-08-02 | 上海电力学院 | Vacuum interrupter Double-coil type structure of contact terminal in mechanical high-voltage dc circuit breaker |
| CN111490518A (en) * | 2020-04-20 | 2020-08-04 | 华电智网（天津）科技有限公司 | Hybrid energy-saving high-speed current limiting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112509858A (en) | 2021-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108133862B (en) | Interlocking vacuum switch and series compensation type current limiting device and method applied by same | |
| CN105280431A (en) | Grounding switch capable of extinguishing arc quickly through electromagnetic reluctance tension | |
| CN217061898U (en) | Direct current breaker and rapid mechanical switching equipment in flexible direct current power grid thereof | |
| CN112509858B (en) | Double-break interlocking quick switch for integrated series compensation current limiting device | |
| CN201877351U (en) | Vacuum switching tube | |
| CN108448551B (en) | Alternating current limiter and current limiting method thereof | |
| CN101599391B (en) | Novel single-fracture single-cylinder self energy high pressure sulfur hexafluoride breaker arc extinguish chamber | |
| CN1128893A (en) | Transient restoring voltage control method, and gas insulation switch used in this method | |
| CN2488165Y (en) | Vacuum circuit breaker | |
| CN116936298A (en) | Direct current breaker and quick mechanical switching device in flexible direct current power grid thereof | |
| CN201465887U (en) | Switching switch of high voltage reactive compensation capacitor | |
| CN201266574Y (en) | High-voltage vacuum breaker for back-to-back double explosion chambers | |
| CN2746507Y (en) | 126 KV single fracture outdoor high-voltage vacuum circuit breaker | |
| CN202758806U (en) | Vacuum circuit breaker | |
| CN202487484U (en) | Indoor high pressure vacuum breaker | |
| CN201812736U (en) | Bipolar vacuum circuit breaker for gas-insulated metal-enclosed switching device | |
| CN100370564C (en) | Single-break-port breaker of 550 KV voltage grade | |
| CN114267559B (en) | A quick switch formula fault current limiting device for superhigh pressure system | |
| CN218771292U (en) | Current limiting device | |
| CN216648094U (en) | Large-current line selection device | |
| CN203134693U (en) | A linkage blowing and spraying arc extinguishing air switch contact mechanism | |
| CN201549440U (en) | Novel single fracture and singlecylinder arc extinguish chamber of self-energized type high pressure sulfur hexafluoride breaker | |
| CN110676696B (en) | Ultra-fast high-power vacuum switch with composite trigger gap | |
| CN114583677B (en) | Direct current breaker based on mechanical switch series connection and direct current switching-on and switching-off method | |
| CN204258314U (en) | For the high reliability switching circuit of the parallel power condenser reactive power compensator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |