CN114360975A - Quick circuit breaker for low-frequency power transmission system - Google Patents
Quick circuit breaker for low-frequency power transmission system Download PDFInfo
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- CN114360975A CN114360975A CN202210032451.8A CN202210032451A CN114360975A CN 114360975 A CN114360975 A CN 114360975A CN 202210032451 A CN202210032451 A CN 202210032451A CN 114360975 A CN114360975 A CN 114360975A
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- contact
- circuit breaker
- moving
- hydraulic spring
- power transmission
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
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Abstract
The invention provides a quick circuit breaker for a low-frequency power transmission system, which belongs to the technical field of circuit breakers and comprises a shell and a hydraulic spring mechanism, wherein a static contact assembly and a moving contact assembly are sequentially arranged in the shell, the moving contact assembly comprises a moving contact supporting seat, a moving arc contact is arranged at the central position of one end, close to the static contact assembly, of the moving contact supporting seat, one side, far away from the static contact assembly, of the moving arc contact is in transmission connection with the output end of the hydraulic spring mechanism through a transmission mechanism, a control valve is arranged on the hydraulic spring mechanism and used for controlling the working state of an oil circuit of the hydraulic spring mechanism, a repulsion mechanism is in transmission connection with the control valve, and the repulsion mechanism is used for changing the working state of the control valve. The invention has the advantages that the opening time of the quick breaker can be greatly shortened, and the quick breaker can be ensured to effectively cut off the low-frequency fault current.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to a quick circuit breaker for a low-frequency power transmission system.
Background
Due to the deepening of the current energy crisis and the urgent need of environmental protection, renewable energy and clean energy are increasingly paid attention by countries in the world. However, since renewable energy sources such as wind power generation and hydroelectric power generation are usually located at a relatively remote place and the rotational speed of the prime mover is low, they are suitable for low-frequency power generation. Meanwhile, low-frequency power transmission has the advantages of reducing reactance, improving transmission capacity and the like, and the low-frequency power transmission technology provides a feasible way for grid-connected operation of new energy. However, the biggest difference between low-frequency power transmission and traditional power-frequency alternating current power transmission is the change of the current period, and the whole wave period is changed from the original 20ms to 66.7 ms. Therefore, in the process of opening and closing the circuit breaker of the low-frequency power transmission system, the time from generation to extinction of the electric arc is prolonged, and the arc extinguishing capability of the arc extinguishing chamber is reduced along with the lengthening of the arc burning time, so that even the long arc can not be opened and closed. Therefore, it is desirable to provide a low frequency circuit breaker capable of greatly reducing the arcing time of the circuit breaker.
Disclosure of Invention
The invention solves the technical problem of providing a quick circuit breaker which is suitable for a low-frequency power transmission system and can greatly reduce the arcing time of the circuit breaker, thereby ensuring that the circuit breaker can effectively cut off low-frequency fault current.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the utility model provides a quick circuit breaker for low frequency transmission system, its includes casing and hydraulic spring mechanism, static contact subassembly and moving contact subassembly have set gradually in the casing, the moving contact subassembly includes the moving contact supporting seat, the central point department of putting of the one end that is close to static contact subassembly on the moving contact supporting seat is provided with the moving arc contact, move on the arc contact keep away from one side of static contact subassembly through drive mechanism with hydraulic spring mechanism's output transmission is connected, the last control valve that is provided with of hydraulic spring mechanism, the control valve is used for controlling hydraulic spring mechanism oil circuit operating condition, the last drive connection of control valve has repulsion force mechanism, repulsion force mechanism is used for changing the operating condition of control valve. Like this because the operating device among this quick circuit breaker has adopted hydraulic spring mechanism, and this quick circuit breaker in hydraulic spring mechanism's oil circuit directly controls through repulsion mechanism, it has shortened mechanical delay time greatly to shorten whole quick circuit breaker's separating brake time by a wide margin, and reduced this quick circuit breaker's arcing time by a wide margin, thereby ensured that this quick circuit breaker can effectively break to low frequency fault current.
Furthermore, the static contact component comprises a static contact supporting seat which is fixedly arranged on the shell, a static arc contact is arranged at the central position of one end of the static contact supporting seat, which is close to the moving contact component, and the static arc contact and the moving arc contact are arranged oppositely; the inner circumference of one end of the static contact supporting seat, which is close to the moving contact component, is provided with the annular static main contact, and the rear end of the static contact supporting seat is provided with the gas outlet channel.
Furthermore, the static contact supporting seat and the moving contact supporting seat are coaxially arranged, a pneumatic arc extinguish chamber is communicated between the static contact supporting seat and the moving contact supporting seat, and the solid content time is greatly shortened through the pneumatic arc extinguish chamber.
Furthermore, the end parts of the movable arc contact and the static arc contact are both provided with high-temperature resistant materials, so that the service lives of the movable arc contact and the static arc contact are prolonged.
Furthermore, an insulating sleeve is arranged between the shell and the static contact supporting seat, and an insulating sleeve is arranged between the shell and the moving contact supporting seat, so that the whole circuit breaker is safer in use.
Furthermore, an insulating sleeve is sleeved on the outer side of the output end of the hydraulic spring mechanism, and the output end of the hydraulic spring mechanism is protected through the insulating sleeve.
Furthermore, the repulsion mechanism is a bidirectional repulsion mechanism or a unidirectional repulsion mechanism, so that the hydraulic spring mechanism can be ensured to be capable of reacting quickly, and the static arc contact and the moving arc contact can be contacted or separated quickly.
According to the technical scheme, the invention has the following advantages: the operating mechanism in the rapid circuit breaker provided by the invention adopts the hydraulic spring mechanism, and the oil circuit of the hydraulic spring mechanism in the rapid circuit breaker is directly controlled by the repulsion mechanism, so that the mechanical delay time is greatly shortened, the opening time of the whole rapid circuit breaker is greatly shortened, the arcing time of the rapid circuit breaker is greatly reduced, and the rapid circuit breaker can be ensured to effectively break low-frequency fault current.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural view of a control valve and a repulsive force mechanism in the present invention.
In the figure: 1. static contact supporting seat, 2, shell, 3, static arc contact, 4, air-compression type arc extinguish chamber, 5, moving arc contact, 6, moving contact supporting seat, 7, transmission mechanism, 8, output end, 9, hydraulic spring mechanism, 10, insulating sleeve, 11, moving contact component, 12, static main contact, 13, static contact component, 14, repulsion mechanism, 15, piston rod, 16, control valve, 17 and oil way.
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.
As shown in fig. 1 and 2, the present invention provides a fast circuit breaker for a low-frequency power transmission system, which includes a housing 2, a static contact assembly 13 and a moving contact assembly 11 are sequentially disposed in the housing 2, and a pneumatic arc extinguish chamber 4 is disposed between the static contact assembly 13 and the moving contact assembly 11. Specifically, the fixed contact assembly 13 includes a fixed contact support base 1, the fixed contact support base 1 is fixedly mounted on the housing 2 through an insulating sleeve 10, a fixed arc contact 3 is arranged at a central position of one end of the fixed contact support base 1 close to the movable contact assembly 11, an annular fixed main contact 12 is arranged on an inner circumference of one end of the fixed contact support base 1 close to the movable contact assembly 11, and an air outlet channel is arranged at a rear end of the fixed contact support base 1. The moving contact component 11 comprises a moving contact supporting seat 6, the moving contact supporting seat 6 is fixedly mounted on the shell 2 through an insulating sleeve 10, the static contact supporting seat 1 and the moving contact supporting seat 6 are coaxially arranged, two ends of the pneumatic arc extinguish chamber 4 are respectively communicated with the static contact supporting seat 1 and the moving contact supporting seat 6, a moving arc contact 5 is arranged at the central position of one end of the moving contact supporting seat 6 close to the static contact component 13, the moving arc contact 5 is arranged opposite to the static arc contact 3, and the static arc contact 3 and the moving arc contact 5 are both positioned inside the pneumatic arc extinguish chamber 4; the ends of the moving arc contact 5 and the static arc contact 3 are both provided with high temperature resistant materials.
In addition, the invention also comprises a hydraulic spring mechanism 9, wherein an output end 8 of the hydraulic spring mechanism 9 is in transmission connection with the moving arc contact 5 through a transmission mechanism 7, and the hydraulic spring mechanism 9 can control the moving arc contact 5 to move towards the direction close to the static arc contact 3 or away from the static arc contact 3, so that the moving arc contact 5 is contacted with or separated from the static arc contact 3. In addition, preferably, an insulating sleeve 10 is sleeved outside the output end 8 of the hydraulic spring mechanism 9, so that the safety of the whole circuit breaker is improved. Furthermore, the hydraulic spring mechanism 9 is provided with a control valve 16, the control valve 16 is used for controlling the working state of an oil path 17 of the hydraulic spring mechanism 9, a repulsion mechanism 14 is in transmission connection with the control valve 16, the repulsion mechanism 14 is used for driving the movement of a piston rod 15 on the control valve 16, namely the repulsion mechanism 14 is used for changing the working state of the control valve 16, and the repulsion mechanism 14 is a two-way repulsion mechanism or a one-way repulsion mechanism.
The working process of the quick circuit breaker for the low-frequency power transmission system provided by the invention is as follows: when fault current is generated in a low-frequency system, the phase selection opening device sends an opening signal to a control module of the repulsion mechanism 14 at preset setting time according to the received circuit signal; at this time, the control module of the repulsion mechanism 14 controls the coil in the repulsion mechanism 14 to discharge after receiving the opening signal, and drives the repulsion disc in the repulsion mechanism 14 to move through the generated electromagnetic repulsion; meanwhile, as the repulsion disc is fixedly connected with the piston rod of the control valve 16, the repulsion disc can drive the piston rod 15 on the control valve 16 to move, so that the working state of the control valve 16 is changed, the working state of the oil way 17 in the hydraulic spring mechanism 9 is changed, and the switching of high and low oil pressure in the oil way 17 of the hydraulic spring mechanism 9 is realized; when the oil path 17 in the hydraulic spring mechanism 9 is changed, the output end 8 of the hydraulic spring mechanism 9 moves along with the oil path, and the motion of the output end 8 of the hydraulic spring mechanism 9 is transmitted to the movable contact assembly through the transmission mechanism 7, so that the movable contact assembly is driven to move along with the motion of the output end 8 of the hydraulic spring mechanism 9, and the opening or closing motion is realized.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a quick circuit breaker for low frequency transmission system, its characterized in that, includes casing and hydraulic spring mechanism, static contact subassembly and moving contact subassembly have set gradually in the casing, the moving contact subassembly includes the moving contact supporting seat, the central point department of putting of the one end that is close to static contact subassembly on the moving contact supporting seat is provided with the moving arc contact, move on the arc contact keep away from one side of static contact subassembly through drive mechanism with hydraulic spring mechanism's output transmission is connected, the last control valve that is provided with of hydraulic spring mechanism, the control valve is used for controlling hydraulic spring mechanism oil circuit operating condition, the last transmission connection of control valve has repulsion mechanism, repulsion mechanism is used for changing the operating condition of control valve.
2. The fast circuit breaker for a low-frequency power transmission system according to claim 1, wherein the fixed contact assembly comprises a fixed contact support base, the fixed contact support base is fixedly mounted on the housing, a fixed arc contact is arranged at a central position of one end of the fixed contact support base, which is close to the movable contact assembly, and the fixed arc contact is arranged opposite to the movable arc contact; the inner circumference of one end of the static contact supporting seat, which is close to the movable contact component, is provided with an annular static main contact, and the rear end of the static contact supporting seat is provided with an air outlet channel.
3. The fast circuit breaker for a low-frequency power transmission system according to claim 2, wherein the fixed contact support and the movable contact support are coaxially arranged, and a pneumatic arc-extinguishing chamber is communicated between the fixed contact support and the movable contact support.
4. Fast circuit breaker for low frequency power transmission systems according to claim 3, characterized in that the ends of the moving and stationary arcing contacts are each provided with a high temperature resistant material.
5. The fast circuit breaker for a low frequency power transmission system according to claim 3, characterized in that an insulating sleeve is provided between said housing and said stationary contact support base, and an insulating sleeve is provided between said housing and said movable contact support base.
6. Quick circuit breaker for low frequency transmission systems according to any of claims 1 to 5, characterized in that the output side of said hydraulic spring mechanism is sheathed with an insulating sheath.
7. Fast circuit breaker for a low frequency power transmission system according to claim 6, characterized in that the repulsion mechanism is a two-way repulsion mechanism.
8. Fast circuit breaker for a low frequency power transmission system according to claim 6, characterized in that the repulsion mechanism is a unidirectional repulsion mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210032451.8A CN114360975A (en) | 2022-01-12 | 2022-01-12 | Quick circuit breaker for low-frequency power transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210032451.8A CN114360975A (en) | 2022-01-12 | 2022-01-12 | Quick circuit breaker for low-frequency power transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114360975A true CN114360975A (en) | 2022-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210032451.8A Pending CN114360975A (en) | 2022-01-12 | 2022-01-12 | Quick circuit breaker for low-frequency power transmission system |
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| Country | Link |
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| CN (1) | CN114360975A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112392789A (en) * | 2020-10-26 | 2021-02-23 | 平高集团有限公司 | Hydraulic control valve, hydraulic operating mechanism using same and circuit breaker |
| CN112503044A (en) * | 2020-03-20 | 2021-03-16 | 国网上海市电力公司 | Hydraulic control valve and hydraulic operating mechanism |
| CN113593993A (en) * | 2021-06-17 | 2021-11-02 | 国网浙江省电力有限公司 | Arc extinguish chamber and tank type circuit breaker |
| CN214624784U (en) * | 2020-12-30 | 2021-11-05 | 南方电网科学研究院有限责任公司 | Operating mechanism and circuit breaker for quickly cutting off circuit |
-
2022
- 2022-01-12 CN CN202210032451.8A patent/CN114360975A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503044A (en) * | 2020-03-20 | 2021-03-16 | 国网上海市电力公司 | Hydraulic control valve and hydraulic operating mechanism |
| CN112392789A (en) * | 2020-10-26 | 2021-02-23 | 平高集团有限公司 | Hydraulic control valve, hydraulic operating mechanism using same and circuit breaker |
| CN214624784U (en) * | 2020-12-30 | 2021-11-05 | 南方电网科学研究院有限责任公司 | Operating mechanism and circuit breaker for quickly cutting off circuit |
| CN113593993A (en) * | 2021-06-17 | 2021-11-02 | 国网浙江省电力有限公司 | Arc extinguish chamber and tank type circuit breaker |
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