CN114093712A - Quick vacuum circuit breaker and control system thereof - Google Patents
Quick vacuum circuit breaker and control system thereof Download PDFInfo
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- CN114093712A CN114093712A CN202111333954.0A CN202111333954A CN114093712A CN 114093712 A CN114093712 A CN 114093712A CN 202111333954 A CN202111333954 A CN 202111333954A CN 114093712 A CN114093712 A CN 114093712A
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- 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
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- 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
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Abstract
The invention relates to a quick vacuum circuit breaker and a control system thereof, which are applied to a 500KV transmission line, wherein the quick vacuum circuit breaker comprises at least 3 unit modules which are connected in series, each unit module comprises two groups of circuit breaker components which are connected in series, each group of circuit breaker components at least comprises a first main circuit breaker, a second main circuit breaker and a voltage-sharing capacitor which are connected in parallel, the first main circuit breaker is also connected in series with a first current-sharing reactor and then connected in parallel with the voltage-sharing capacitor, and the second main circuit breaker is also connected in series with a second current-sharing reactor and then connected in parallel with the voltage-sharing capacitor. The quick vacuum circuit breaker adopts the three series unit modules and the unit modules consisting of the two parallel and two series four main circuit breakers to form the multi-break series quick vacuum circuit breaker, the on-off time of the quick vacuum circuit breaker is reduced to 10ms, and the technical problems that the on-off time of a switch of the existing circuit breaker is 40ms, and the stability and the power transmission capacity of a 500kV power transmission line power system cannot be met are solved.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a quick vacuum circuit breaker and a control system thereof.
Background
In the actual operation of a power grid of a power system, the power transmission capacity of an alternating current transmission line is mainly limited by two aspects, namely the thermal stability constraint of the line; another aspect is transient stability constraints for the power system, including transient power angle stability constraints, transient voltage stability constraints, and transient frequency stability constraints.
At present, 500kV alternating current lines (such as West and east power transmission alternating current channels) in the power grid range of the power transmission capacity of an alternating current transmission line have more conditions that the transient stability limit is lower than the thermal stability limit. For example: in the summer mode calculation of the peak-to-peak degree in 2018, the thermal stability limit of the Guangdong alternating current inlet is 9300MW, during double-line maintenance, the transient voltage instability of a Sterculia station after the main transformer failure of mountain flower N-2 and sagitta mountain is limited, the transient stability limit of the Guangdong alternating current inlet is 6300MW, and the power transmission capacity of a line has a larger promotion space. When large-capacity power plants in regional power grids such as Guangdong and Guangxi are sent out, transient instability of the power grid is easily caused after a power system fails, for example: in the calculation of the peak-to-peak summer mode in 2018, when the longriver first line is overhauled, in order to avoid instability of a power angle of a longbeach power plant after the N-1 fault of a 500kV longhorizon line, the output of the longbeach power plant is limited to be not more than 3000 MW. For the case where the transient stability limit is lower than the thermal stability limit, the power transmission capability of the ac transmission line is determined by the transient stability limit.
The transient stability of the power system refers to the capability of each generator to keep synchronous operation and transition to a new state or recover to obtain an original stable operation state after the power system is subjected to large interference. One key reason for the low transient stability limit is that the isolation of the 500kV transmission line fault takes longer, which accelerates the deterioration of the transient stability characteristic of the system in the fault and recovery process, and weakens the power transmission capability of the transmission line and the stability of the power system to a certain extent. Therefore, reducing the fault isolation time of the 500kV power transmission line is of great significance to enhancing the power transmission capacity of the power transmission line and improving the safety and stability of a power grid. According to the provision of the fault clearing time of the power system in the southern power grid safety and stability calculation and analysis guide (hereinafter referred to as the guide), for a 500kV high-voltage alternating-current transmission line, the quick protection fault clearing time adopted in simulation calculation is considered according to 90ms at the near fault point side and 100ms at the far fault point side, except a certain margin, the quick protection fault clearing time comprises 40ms of on-off time of a switch, and the total time of detection, judgment and exit time of relay protection faults is about 35 ms.
Based on the fault clearing time specified in the current guide rule, the power transmission capacity of a 500kV alternating-current transmission line in a power grid area of a power system is greatly limited. The requirement of the technical specification of the on-off time of the 550kV alternating current circuit breaker for the network access of the current power system is lower than 60ms, and the on-off time of the circuit breaker of most manufacturers can reach about 40ms according to the current circuit breaker manufacturing process and the technical level. In order to reduce the fault clearing time of the power system and further improve the transient stability limit of the power system, a breaker with short breaking time needs to be designed.
Disclosure of Invention
The embodiment of the invention provides a rapid vacuum circuit breaker and a control system thereof, which are used for solving the technical problem that the stability and the power transmission capacity of a 500kV power transmission line power system cannot be met due to the fact that the switch on-off time of an existing circuit breaker is 40 ms.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
the utility model provides a quick vacuum circuit breaker, is applied to on the 500KV transmission line, this quick vacuum circuit breaker includes 3 at least series connection's unit module, every the unit module includes two sets of series connection's circuit breaker subassembly, every group the circuit breaker subassembly includes parallel connection's first main circuit breaker, second main circuit breaker and voltage-sharing capacitance at least, first main circuit breaker still with after first reactance series connection that flow equalizes with voltage-sharing capacitance is parallelly connected, second main circuit breaker still with after the reactance series connection that flow equalizes with the second with voltage-sharing capacitance is parallelly connected.
Preferably, the first main circuit breaker and the second main circuit breaker are both provided with a fast repulsion mechanism, the fast repulsion mechanism comprises a vacuum arc extinguish chamber, a movable conductive rod, a switching-off coil, a repulsion disc and a switching-on coil, the vacuum arc extinguish chamber is provided with a movable contact and a fixed contact, the movable contact of the vacuum arc extinguish chamber is connected with the movable conductive rod, the movable conductive rod is rigidly connected with the repulsion disc, and the switching-off coil and the switching-on coil are respectively arranged on the repulsion disc; the moving contact and the static contact of the vacuum arc extinguish chamber are respectively connected with two ends of a power transmission line, and the closing coil or the opening coil is connected with the voltage-sharing capacitor.
Preferably, the fast repulsive force mechanism includes a switching element connected to the voltage-equalizing capacitor.
Preferably, the quick repulsive force mechanism comprises spring elements arranged on two sides of the movable conducting rod, one end of each spring element is fixedly connected with the movable conducting rod, and the other end of each spring element is fixed on the shell of the first main circuit breaker or the second main circuit breaker.
Preferably, the quick repulsive force mechanism comprises a buffer, and the buffer is arranged right below the movable conducting rod and is positioned below the opening coil or the closing coil.
Preferably, an insulating pull rod is further arranged on the movable conducting rod.
Preferably, the capacitance value of the voltage-sharing capacitor is not more than 1000 pF.
The invention also provides a control system of the rapid vacuum circuit breaker, which is applied to a 500KV power transmission line and comprises a control module for controlling the rapid vacuum circuit breaker to operate and a power supply module for supplying power to a voltage-sharing capacitor in the rapid vacuum circuit breaker.
Preferably, the control module comprises an acquisition command submodule, a discharge submodule and an execution submodule;
the command acquisition sub-module is used for acquiring command information of switching on or switching off of the rapid vacuum circuit breaker;
the discharge submodule is used for controlling the voltage-sharing capacitor to discharge to a switching-off coil or a switching-on coil of the rapid vacuum circuit breaker according to the command information;
the execution submodule is used for controlling the switching-on coil or the switching-off coil to generate pulse current according to the discharge of the discharge submodule, and the pulse current controls the movement of a repulsion plate of the rapid vacuum circuit breaker so as to drive a movable conducting rod of the rapid vacuum circuit breaker to move.
Preferably, the time required for the execution submodule to control the opening coil or the closing coil to generate the pulse current is 5ms to 10 ms.
According to the technical scheme, the embodiment of the invention has the following advantages: this quick vacuum circuit breaker and control system thereof, be applied to on the 500KV transmission line, this quick vacuum circuit breaker includes 3 at least series connection's unit module, every unit module includes two sets of series connection's circuit breaker subassembly, every group circuit breaker subassembly includes parallel connection's first main circuit breaker, second main circuit breaker and voltage-sharing capacitance at least, first main circuit breaker still with first reactance series connection that flow equalizes after parallelly connected with voltage-sharing capacitance, second main circuit breaker still with second reactance series connection that flow equalizes after parallelly connected with voltage-sharing capacitance. The quick vacuum circuit breaker adopts the three series unit modules and the unit modules consisting of the two parallel and two series four main circuit breakers to form the multi-break series quick vacuum circuit breaker, the on-off time of the quick vacuum circuit breaker is reduced to 10ms, and the technical problems that the on-off time of a switch of the existing circuit breaker is 40ms, and the stability and the power transmission capacity of a 500kV power transmission line power system cannot be met are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic view of a fast vacuum circuit breaker according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a fast repulsive force mechanism in the fast vacuum circuit breaker according to the embodiment of the present invention;
fig. 3 is a schematic model view of a fast repulsive force mechanism in the fast vacuum circuit breaker according to the embodiment of the present invention;
fig. 4 is a block diagram of a control system of a fast vacuum circuit breaker according to an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below 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.
In the description of the embodiments of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience in describing the embodiments of the present invention and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.
In the embodiments of the present application, unless otherwise specifically stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.
The embodiment of the application provides a quick vacuum circuit breaker and a control system thereof, which are applied to a 500KV power transmission line and used for solving the technical problems that the switch on-off time of the existing circuit breaker is 40ms, and the stability and the power transmission capacity of a 500kV power transmission line power system cannot be met.
The first embodiment is as follows:
fig. 1 is a schematic diagram of a fast vacuum circuit breaker according to an embodiment of the present invention.
The embodiment of the invention provides a quick vacuum circuit breaker, which is applied to a 500KV transmission line and comprises at least 3 unit modules 10 connected in series, wherein each unit module 10 comprises two groups of circuit breaker assemblies 11 connected in series, each group of circuit breaker assemblies 11 at least comprises a first main circuit breaker, a second main circuit breaker and a voltage-sharing capacitor which are connected in parallel, the first main circuit breaker is connected with a first current-sharing reactor in series and then connected with the voltage-sharing capacitor in parallel, and the second main circuit breaker is connected with a second current-sharing reactor in series and then connected with the voltage-sharing capacitor in parallel.
It should be noted that, as shown in fig. 1, the fast vacuum circuit breaker includes 3 unit modules 10, two sets of circuit breaker assemblies 11 connected in series are disposed on each unit module 10, each circuit breaker assembly 11 includes first main circuit breakers QF 11-QF 61, second main circuit breakers QF 12-QF 62 and equalizing capacitors C11-C61, and the unit modules 10 in a two-in-two series structure are formed. In this embodiment, the first main breakers QF11 to QF61 are respectively connected in series with a first current sharing reactance L11 to L61, and the second main breakers QF12 to QF62 are respectively connected in series with a second current sharing reactance L12 to L62. Wherein, every main circuit breaker all connects in series a reactance that flow equalizes, when mainly every main circuit breaker of this quick vacuum circuit breaker breaks, is used for balancing the electric current on two fractures of every main circuit breaker. Two main circuit breakers in each group of circuit breaker assembly 11 are connected in parallel and then connected in parallel with the voltage-sharing capacitor, and are mainly used for balancing the voltage on the fracture of each main circuit breaker when each main circuit breaker of the quick vacuum circuit breaker is switched on and off.
In the embodiment of the present application, when the fast vacuum circuit breaker is in a closed state, the contact resistance of each main circuit breaker is 10-6Omega level, even if the contact resistances of two main breakers connected in parallel differ by a few micro-ohms, then 10-6The contact resistance difference of the order of Ω also has a great influence on the distribution of the rated current and the short-circuit current over the two parallel main breakers. It is therefore necessary to provide in series in each branch of the parallel main circuit breaker a large impedance, i.e. a current-sharing reactance, which is large enough to overwhelm the differential resistances of the contact resistors themselves, which have an effect on the shunt currents, in order to balance the rated currents of the two parallel main circuit breakers during normal operation of the fast vacuum circuit breaker and to balance the breaking currents of the break of each parallel main circuit breaker when the fast vacuum circuit breaker has a short-circuit fault.
It should be noted that the resistance of each current sharing reactance needs to be much larger than the contact resistance of each main breaker. The two sets of series connected circuit breaker assemblies 11 may optionally be connected by copper bars.
In the embodiment of the present application, the capacitance value of each voltage-sharing capacitor is not greater than 1000pF, and the fracture voltage-sharing setting of the two sets of series-connected circuit breaker assemblies 11 of the rapid vacuum circuit breaker is realized.
It should be noted that, in the following description,the vacuum gap between the contacts of the main circuit breaker has good insulation and voltage resistance, the breakdown voltage of the vacuum gap and the opening distance generally form a linear relation, but the insulation of the vacuum gap with large opening distance has a saturation effect formula of Ub＝k·sαUnder a large vacuum gap is described, wherein UbThe breakdown voltage of the vacuum gap, s, and α are constants between 0.4 and 0.7, which are related to the contact material and the processing technique of the main breaker. When the vacuum gaps of the two groups of circuit breaker assemblies are connected in series, the relationship between the breakdown voltage and the vacuum gaps is U under the ideal conditiondouble＝2k·sαThe breakdown voltage equivalent to a single vacuum gap can also be: u shapesingle＝k·(2s)α. The maximum value K of the double vacuum gap insulation performance improvement under the ideal condition can be obtained by the two relations2Comprises the following steps:
therefore, when the vacuum gaps of n groups of breaker assemblies are connected in series, the maximum value Kn of the improvement of the insulation performance of the vacuum gaps is as follows:
in the formula of UnSeries breakdown voltage, U, for vacuum gaps of n sets of breaker assembliessingleThe series connection of the vacuum gaps for n sets of breaker assemblies is equivalent to the breakdown voltage of a single vacuum gap. Therefore, the unit module 10 of the rapid vacuum circuit breaker of the present application adopts two sets of serially connected breaker assemblies to fully utilize the excellent insulation characteristic of the small-opening-distance vacuum gap, and effectively improve the voltage withstanding level of the rapid vacuum circuit breaker.
In the embodiment of the present application, the main circuit breaker of each group of circuit breaker assemblies 11 is connected in series with the current equalizing reactor and then connected in parallel with the voltage equalizing capacitor, so as to balance the voltage division on the break of each main circuit breaker and realize the voltage equalizing distribution on the break of each main circuit breaker.
It should be noted that, the voltage-sharing effect of the voltage-sharing capacitor should satisfy the following formula:
in the formula of UtotalIs the total voltage at the break of the rapid vacuum interrupter.
It should be noted that the voltage-sharing capacitance is not greater than 1000pF, so as to ensure the voltage-sharing effect and prevent the reduction of the breaking performance of the main circuit breaker; the adopted voltage-sharing capacitor can resist short-time voltage impact, and enough voltage-withstanding allowance is reserved, so that the explosion phenomenon of the voltage-sharing capacitor is prevented when the main circuit breaker is subjected to short-time overvoltage.
The invention provides a quick vacuum circuit breaker, which is applied to a 500KV transmission line and comprises at least 3 unit modules connected in series, wherein each unit module comprises two groups of circuit breaker assemblies connected in series, each group of circuit breaker assemblies at least comprises a first main circuit breaker, a second main circuit breaker and a voltage-sharing capacitor which are connected in parallel, the first main circuit breaker is also connected in series with a first current-sharing reactor and then connected in parallel with the voltage-sharing capacitor, and the second main circuit breaker is also connected in series with a second current-sharing reactor and then connected in parallel with the voltage-sharing capacitor. The quick vacuum circuit breaker adopts the three series unit modules and the unit modules consisting of the two parallel and two series four main circuit breakers to form the multi-break series quick vacuum circuit breaker, the on-off time of the quick vacuum circuit breaker is reduced to 10ms, and the technical problems that the on-off time of a switch of the existing circuit breaker is 40ms, and the stability and the power transmission capacity of a 500kV power transmission line power system cannot be met are solved.
Fig. 2 is a schematic structural diagram of a fast repulsive mechanism in a fast vacuum circuit breaker according to an embodiment of the present invention, and fig. 3 is a schematic model diagram of the fast repulsive mechanism in the fast vacuum circuit breaker according to the embodiment of the present invention.
As shown in fig. 2, in an embodiment of the present invention, the first main circuit breaker and the second main circuit breaker are both provided with a fast repulsion mechanism 20, the fast repulsion mechanism 20 includes a vacuum arc-extinguishing chamber 21, a moving conductive rod 22, an opening coil 23, a repulsion coil 24 and a closing coil 25, the vacuum arc-extinguishing chamber 24 is provided with a moving contact and a fixed contact, the moving contact of the vacuum arc-extinguishing chamber 24 is connected with the moving conductive rod 22, the moving conductive rod 22 is rigidly connected with the repulsion coil 24, and the opening coil 23 and the closing coil 25 are respectively disposed on the repulsion coil 24; the moving contact and the static contact of the vacuum arc extinguish chamber 21 are respectively connected with two ends of a power transmission line, and the closing coil 23 or the opening coil 25 is connected with the voltage-sharing capacitor C.
It should be noted that, the pre-charged equalizing capacitor C discharges to the opening coil 23 or the closing coil 24 (as shown in a of fig. 3) to generate a pulse current lasting for several milliseconds, the opening coil 23 or the closing coil 24 generates an alternating magnetic field under the action of the pulse current, meanwhile, the repulsion plate 24 (as shown in b of fig. 3) generates power magnetism due to the induction of eddy current, the repulsion plate 24 moves rapidly under the action of lorentz repulsion force, the moving contact of the vacuum interrupter 21 is driven by the moving conductive rod 22 to act, and thus, the rapid opening and closing of the branch circuit of the rapid vacuum circuit breaker is realized. In the present embodiment, the repulsive disc 24 is made of metal.
As shown in fig. 2, in the present embodiment, the quick repulsive force mechanism 20 includes a switching element K connected to a voltage-equalizing capacitor C.
The switching element K may be a circuit breaker, or may be a switch having a closed circuit, such as a mechanical switch or a control switch.
In the embodiment of the present application, the fast repulsion mechanism 20 includes spring elements 26 disposed on both sides of the moving conductive rod 22, one end of the spring element 26 is fixedly connected to the moving conductive rod 22, and the other end of the spring element 26 is fixed to a housing 27 of the first main breaker or the second main breaker.
The spring element 26 may be a spring or a member having an elastic function. In this embodiment, the two sides of the movable conducting rod 22 of the fast repulsion mechanism 20 are both provided with spring elements 26 for limiting the moving amplitude of the two sides of the movable conducting rod 22, and also for making the movable conducting rod 22 in a stable state, so as to realize that the main circuit breaker of the fast vacuum circuit breaker has a bistable function.
In the embodiment of the present application, the fast repulsion mechanism includes a buffer 28, and the buffer 28 is disposed directly below the moving conductive rod 22 and below the opening coil 23 or the closing coil 25.
It should be noted that the buffer 28 is mainly used to limit the displacement of the conductive rod 22 moving downward and buffer the impact force of the quick repulsive mechanism.
In the embodiment of the present application, an insulating pull rod 29 is further disposed on the movable conductive rod 22.
In the embodiment of the application, each main breaker in the quick vacuum breaker adopts an advanced permanent magnet maintaining, double-coil bistable state and direct-acting type quick repulsion mechanism of eddy repulsion force, the action is reliable, the switching-off and switching-on speeds are high, and the overall structure of the main breaker is simple.
Example two:
fig. 4 is a block diagram of a control system of a fast vacuum circuit breaker according to an embodiment of the present invention.
As shown in fig. 2 and 4, the embodiment of the present invention further provides a control system for a fast vacuum circuit breaker, which is applied to a 500KV transmission line, and includes a control module 30 for controlling the operation of the fast vacuum circuit breaker and a power module 40 for supplying power C to a voltage-sharing capacitor in the fast vacuum circuit breaker.
In the embodiment of the present application, the control module 30 includes an acquisition command submodule 31, a discharge submodule 32, and an execution submodule 33;
the acquisition command submodule 31 is configured to acquire command information for switching on or switching off the fast vacuum circuit breaker;
the discharging submodule 32 is used for controlling the voltage-sharing capacitor to discharge to a switching-off coil or a switching-on coil of the rapid vacuum circuit breaker according to the command information;
and the execution submodule 33 is used for controlling the switching-on coil or the switching-off coil to generate pulse current according to the discharge of the discharge submodule 32, and controlling the movement of a repulsive force disc of the rapid vacuum circuit breaker through the pulse current so as to drive the movable conducting rod of the rapid vacuum circuit breaker to move.
It should be noted that, after the control system of the fast vacuum circuit breaker obtains the command of switching on or switching off of the fast vacuum circuit breaker through the obtaining command submodule 31, the discharging submodule 32 controls the voltage-sharing capacitor of the fast vacuum circuit breaker to discharge to the switching on coil or the switching off coil of the fast vacuum circuit breaker, so as to generate a pulse current within 10ms of duration, and the pulse current makes the eddy current disk in the pulse magnetic field in the switching on coil or the switching off coil and the repulsion disk of the fast vacuum circuit breaker receive strong thrust due to the induced eddy current, and drives the moving contact of the vacuum arc-extinguishing chamber in the main circuit breaker to complete the switching on or switching off action, so as to reduce the switching on or off of the fast vacuum circuit breaker to within 10 ms.
In the embodiment of the present invention, the time required for the execution submodule 33 to control the opening coil or the closing coil to generate the pulse current is 5ms to 10 ms.
It should be noted that the fast vacuum circuit breaker in the control system of the second embodiment is described in detail in the first embodiment, and the content of the fast vacuum circuit breaker is not described in detail in the second embodiment.
Illustratively, a computer program may be partitioned into one or more modules/units, which are stored in a memory and executed by a processor to accomplish the present application. One or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of a computer program in a terminal device.
The terminal device may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor, a memory. Those skilled in the art will appreciate that the terminal device is not limited and may include more or fewer components than those shown, or some components may be combined, or different components, e.g., the terminal device may also include input output devices, network access devices, buses, etc.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage may be an internal storage unit of the terminal device, such as a hard disk or a memory of the terminal device. The memory may also be an external storage device of the terminal device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the terminal device. Further, the memory may also include both an internal storage unit of the terminal device and an external storage device. The memory is used for storing computer programs and other programs and data required by the terminal device. The memory may also be used to temporarily store data that has been output or is to be output.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a quick vacuum circuit breaker, is applied to on the 500KV transmission line, its characterized in that, this quick vacuum circuit breaker includes 3 at least series connection's unit module, every unit module includes two sets of series connection's circuit breaker subassembly, every group the circuit breaker subassembly includes first main circuit breaker, second main circuit breaker and the voltage-sharing capacitance of parallel connection at least, first main circuit breaker still with first reactance series connection that flow equalizes after with voltage-sharing capacitance is parallelly connected, second main circuit breaker still with second reactance series connection after with voltage-sharing capacitance is parallelly connected.
2. The fast vacuum circuit breaker according to claim 1, wherein the first main circuit breaker and the second main circuit breaker are both provided with fast repulsion mechanisms, each fast repulsion mechanism comprises a vacuum arc-extinguishing chamber, a moving conductive rod, a separating brake coil, a repulsion disc and a closing coil, the vacuum arc-extinguishing chamber is provided with a moving contact and a fixed contact, the moving contact of the vacuum arc-extinguishing chamber is connected with the moving conductive rod, the moving conductive rod is rigidly connected with the repulsion disc, and the separating brake coil and the closing coil are respectively arranged on the repulsion disc; the moving contact and the static contact of the vacuum arc extinguish chamber are respectively connected with two ends of a power transmission line, and the closing coil or the opening coil is connected with the voltage-sharing capacitor.
3. Fast vacuum circuit breaker according to claim 2, characterized in that said fast repulsion means comprise a switching element connected to said voltage equalizing capacitance.
4. The fast vacuum circuit breaker according to claim 2, wherein the fast repulsive force mechanism comprises spring elements disposed at both sides of the moving conductive rod, one end of the spring element is fixedly connected to the moving conductive rod, and the other end of the spring element is fixed to a housing of the first main breaker or the second main breaker.
5. The fast vacuum circuit breaker according to claim 2, wherein the fast repulsive force mechanism includes a buffer disposed directly below the moving conductive rod and below the opening coil or the closing coil.
6. The quick vacuum circuit breaker according to claim 2, characterized in that said moving conductive rod is further provided with an insulating pull rod.
7. Fast vacuum interrupter as claimed in claim 1, characterized in that the capacitance value of the voltage-sharing capacitor is not more than 1000 pF.
8. A control system for a fast vacuum circuit breaker, applied to a 500KV transmission line, comprising a control module for controlling the operation of the fast vacuum circuit breaker according to any one of claims 2-7 and a power supply module for supplying power to a voltage-sharing capacitor in the fast vacuum circuit breaker.
9. The control system of the quick vacuum circuit breaker according to claim 8, wherein the control module includes a get command submodule, a discharge submodule, and an execution submodule;
the command acquisition sub-module is used for acquiring command information of switching on or switching off of the rapid vacuum circuit breaker;
the discharge submodule is used for controlling the voltage-sharing capacitor to discharge to a switching-off coil or a switching-on coil of the rapid vacuum circuit breaker according to the command information;
the execution submodule is used for controlling the switching-on coil or the switching-off coil to generate pulse current according to the discharge of the discharge submodule, and the pulse current controls the movement of a repulsion plate of the rapid vacuum circuit breaker so as to drive a movable conducting rod of the rapid vacuum circuit breaker to move.
10. The control system of the fast vacuum circuit breaker according to claim 9, wherein the time required for the executive submodule to control the opening coil or the closing coil to generate the pulse current is 5ms to 10 ms.
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| CN117498284A (en) * | 2023-10-26 | 2024-02-02 | 武汉大学 | Series compensation capacitor device based on short-circuit fault current intelligent self-driving |
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