CN107769369B - A kind of composite switch based on coupling negative pressure circuit - Google Patents
A kind of composite switch based on coupling negative pressure circuit Download PDFInfo
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- CN107769369B CN107769369B CN201711007803.XA CN201711007803A CN107769369B CN 107769369 B CN107769369 B CN 107769369B CN 201711007803 A CN201711007803 A CN 201711007803A CN 107769369 B CN107769369 B CN 107769369B
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- state
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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
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/547—Combinations of mechanical switches and static switches, the latter being controlled by the former
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
Abstract
The invention proposes a kind of composite switch circuit based on coupling negative pressure circuit, switching switch, switch protecting system and its control methods; wherein the composite switch circuit includes; mechanical switch branch, change of current branch, auxiliary solid-state switch branch and energy absorption branch, the change of current branch include main solid-state switch branch and coupling negative pressure circuit；Solid-state switch in the auxiliary solid-state switch branch includes the electronic power switch of reverse parallel connection；The main solid-state switch branch topology is full-bridge circuit, including electronic power switch/diode inverse parallel circuit and capacitor, the electronic power switch/diode inverse parallel circuit be in parallel with the capacitor.Of the invention has the characteristics that high reliablity based on the composite switch circuit, switching switch, switch protecting system for coupling negative pressure circuit, and easy to control.
Description
Technical field
The present invention relates to power electronics field more particularly to a kind of composite switch electricity based on coupling negative pressure circuit
Road, converting switch device and control method.
Background technique
Currently there is a kind of automatic charging type to force zero passage high voltage DC breaker (referring to patent CN105186443A), it is this
Breaker has used high-speed switch unit, energy-absorbing unit, mutual reactor unit, commutation capacitor unit and major loop disconnecting switch
Unit.Automatic charging type as shown in Figure 1 forces the physical circuit figure of zero passage high voltage DC breaker, the first disconnecting switch K1 with
High-speed switch CB, primary side winding L1, the second disconnecting switch K2 are sequentially connected in series, and energy-absorbing unit MOV is in parallel with high-speed switch CB, charging
Switch K3 and commutation capacitor C, vice-side winding L2 are sequentially connected in series, and one end is connect with high-speed switch CB input terminal, the other end and fast
Fast switch CB output end connection.
This automatic charging type forces zero passage high voltage DC breaker, and precharge device is small in size, the triggering of change of current branch is opened
Pass rate request is low, control is simple, can cut-off the fault current of either direction.It is low but there is circuit reliabilities, and
It is unfavorable for opening a sluice gate/shutting-brake control, switchs slower.
Summary of the invention
In order to solve the above technical problem, the present invention provides it is a kind of based on coupling negative pressure circuit composite switch circuit,
Switching switch, protection system and its control method.
The present invention provides a kind of composite switch circuits based on coupling negative pressure circuit, which is characterized in that
The composite switch circuit includes mechanical switch branch, change of current branch, auxiliary solid-state switch branch and energy absorption
Branch, the change of current branch include main solid-state switch branch and the concatenated coupling negative pressure circuit of the main solid-state switch branch,
In,
Solid-state switch in the auxiliary solid-state switch branch includes the electronic power switch of reverse parallel connection；
Solid-state switch in the main solid-state switch branch includes electronic power switch/diode inverse parallel circuit and electricity
Hold, the electronic power switch/diode inverse parallel circuit is in parallel with the capacitor.
Further, the mechanical switch branch, the change of current branch, the auxiliary solid-state switch branch and the energy are inhaled
Revenue and expenditure road is connected in parallel.
Further, the coupling negative pressure circuit includes coupling coil, thyristor and discharge capacity.
Further, the first winding of coupling coil of the coupling negative pressure circuit is located at the main solid-state switch branch；Institute
The second winding for stating coupling coil is located at the discharge capacity circuit, and the thyristor, discharge capacity with described second around
Group forming circuit.
Further, the discharge capacity is powered by DC power supply circuit.
Further, the mechanical switch branch includes mechanical switch；And/or
Solid-state in solid-state switch in the main solid-state switch branch only one or the main solid-state switch branch is opened
Closing has multiple, and is connected in series；And/or
Solid-state in solid-state switch in the auxiliary solid-state switch branch only one or the auxiliary solid-state switch branch is opened
Closing has multiple, and is connected in series；And/or
The energy absorption branch includes arrester.
Further, the electronic power switch includes but is not limited to thyristor, IGBT or IGCT.
The present invention also provides a kind of switching circuit control method, applied to as above any described based on coupling negative pressure electricity
The composite switch circuit on road, which is characterized in that
Main solid-state switch branch conducting is controlled, mechanical branch is controlled and disconnects；
Control the conducting of negative pressure circuit；
Main solid-state switch branch is controlled to disconnect.
Further, the contact of the mechanical switch in the mechanical switch branch, which reaches, effectively opens away from rear, control negative pressure
Circuit conducting.
Further, negative pressure circuit is connected by controlling the turn on thyristors in the negative pressure circuit.
Further, the contact gap of the mechanical switch in the mechanical switch branch is able to bear transient recovery voltage
When, it controls the main solid-state switching circuits and disconnects.
The present invention also provides a kind of switching circuit control method, applied to as above any described based on coupling negative pressure electricity
The composite switch circuit on road, which is characterized in that
Control the auxiliary solid-state switch branch conducting；
The mechanical switch branch conducting is controlled, the auxiliary solid-state switch branch is controlled and disconnects.
The present invention also provides a kind of automatic transfer switch devices, which is characterized in that the automatic transfer switch device packet
Include main switching switch block and standby switching switch block, wherein
The main switching switch block includes three as above any composite switch based on coupling negative pressure circuit
Circuit is respectively used in the A phase, B phase, C phase branch of three-phase electricity；
The standby switching switch block includes three as above any composite switch based on coupling negative pressure circuit
Circuit is respectively used in the A phase, B phase, C phase branch of three-phase electricity.
The present invention also provides a kind of power supply switch protecting systems, which is characterized in that
The power protection switching system includes:
Working power and backup power source；
Automatic transfer switch device as described above, main switching switch block and work in the automatic transfer switch device
Make power supply connection, standby switching switch block is connect with backup power source；
Monitoring system, the working condition for monitoring power supply and/or backup power source；
Control protection system controls the automatic transfer switch according to as above any switching circuit control method and fills
Middle main switching switch block and/or standby switching switch block separating brake are set, and/or according to switching circuit control method as described above
Main switching switch block and/or standby switching switch block in the automatic transfer switch device is controlled to close a floodgate.
Further, the monitoring system is also used to for the information of the working condition being sent to control protection system
System, the Control protection system according to the information control the automatic transfer switch device the main switching switch block with
Switch between standby switching switch block.
Further, the monitoring system also detects the switch closing and switch opening state of the automatic transfer switch, and will be described
The information of state feeds back to the Control protection system.
Composite switch circuit based on coupling negative pressure circuit, switching switch, protection system and its controlling party of the invention
Method, have the characteristics that low-loss, it is easy to control, can be switched fast, and reliable performance.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 shows automatic charging type in the prior art and forces zero passage high voltage DC breaker structural schematic diagram；
Fig. 2 shows the composite switch electrical block diagrams based on coupling negative pressure circuit of the embodiment of the present invention；
Fig. 3 shows the hybrid automatic transfer switch device knot according to an embodiment of the present invention based on coupling negative pressure circuit
Structure schematic diagram；
Fig. 4 shows dual power supply redundancy power supply system structural schematic diagram according to an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention clearly and completely illustrated, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Switching switch of the invention uses the composite switch circuit based on coupling negative pressure circuit.The embodiment of the present invention with
It is illustrated for switching switching circuit, but it should be recognized by those skilled in the art that without departing from base of the invention
In the case where present inventive concept, switching switch, all switching circuits that can be realized connecting and disconnecting of the circuit such as breaker, component, assembly unit,
The present invention can be achieved in equipment, system etc., and it is interior that these are all within the scope of protection of the present invention.
As shown in Fig. 2, the switching circuit includes the mechanical switch branch, change of current branch, auxiliary solid-state switch being connected in parallel
Branch and energy absorption branch.Wherein, the mechanical switch branch includes mechanical switch；Auxiliary solid-state switch branch include one or
Multiple concatenated solid-state switches as auxiliary solid-state switch, the solid-state switch are formed for two electronic power switch reverse parallel connections
Solid-state switch, the electronic power switch includes but is not limited to thyristor, insulated gate bipolar transistor IGBT, integrated door
Pole commutated thyristor IGCT etc., is illustrated by taking thyristor as an example, but be not limited to thyristor in embodiment, but any electric power
Electronic switch can be applied to the present invention；The change of current branch include main solid-state switch branch and with the main solid-state switch branch
Concatenated coupling negative pressure circuit, the main solid-state switch branch include one or more concatenated solid-states as main solid-state switch
Switch.Indicate can be with a solid-state switch or there are multiple to break for branch in Fig. 2 where main solid-state switch, auxiliary solid-state switch
Concatenated solid-state switch, it is not intended that the branch where solid-state switch electrically disconnects.
As shown in Fig. 2, the solid-state switch in the main solid-state switch branch include thyristor/diode inverse parallel circuit and
Capacitor, the thyristor/diode inverse parallel circuit are in parallel with the capacitor.The main solid-state switch includes multiple controllable brilliant locks
Pipe/diode inverse parallel circuit, for the sake of clarity, as illustratively, with the first controlled thyristor/diode in embodiment
Inverse parallel circuit, the second controlled thyristor/diode inverse parallel circuit, third controlled thyristor/diode inverse parallel circuit,
Four controlled thyristors/diode inverse parallel circuit distinguishes.First controlled thyristor/diode inverse parallel circuit and second can
Control thyristor/diode inverse parallel circuit is connected in series to form the first series circuit, third controlled thyristor/diode inverse parallel
Circuit and four controlled thyristors/diode inverse parallel circuit are connected in series to form the second series circuit, first series electrical
Road and the second series circuit are in parallel with a capacitor.
The present invention is not restricted to this four electricity of above-mentioned first to fourth controlled thyristor/diode inverse parallel circuit
Road.
It can also include the first controlled thyristor/diode inverse parallel circuit, third controlled thyristor/diode inverse parallel
Circuit and the capacitor, and the first controlled thyristor/diode inverse parallel circuit, third controlled thyristor/diode are instead simultaneously
Connection circuit and the capacitor parallel connection form the main solid-state switch.Further, can also have the controlled thyristors of multiple parallel connections/
Diode inverse parallel circuit is in parallel with the capacitor to form the main solid-state switch.
Can also include can also include the first controlled thyristor/diode inverse parallel circuit, the second controlled thyristor/bis-
Pole pipe inverse parallel circuit and the capacitor, and first controlled thyristor/diode inverse parallel circuit and described second can
Control thyristor/diode inverse parallel circuit connects to form the first series circuit, and first series circuit and the capacitor are in parallel
Form the main solid-state switch.
It can also include the first controlled thyristor/diode inverse parallel circuit, the second controlled thyristor/diode inverse parallel
Circuit, third controlled thyristor/diode inverse parallel circuit and the capacitor, and first controlled thyristor/diode
Inverse parallel circuit connects to form the first series circuit with second controlled thyristor/diode inverse parallel circuit, and described first
Series circuit, third controlled thyristor/diode inverse parallel circuit and the capacitor parallel connection form the main solid-state switch.
Further, may include in above-mentioned any first series circuit and/or the second series circuit three or three with
Upper concatenated controlled thyristor/diode inverse parallel circuit.
One end of the main solid-state switch branch is connect with a winding of coupling coil Ls, and the mutual inductor Ls's is another
A winding in the discharge capacity circuit, thus two windings of mutual inductor Ls make change of current branch with couple negative pressure circuit coupling
It closes；The coupling negative pressure circuit includes thyristor S, discharge capacity Cs and coupling coil Ls, the thyristor S, discharge capacity Cs
It is formed into a loop with the second winding of the coupling coil Ls.It is also the capacitor meanwhile in order to charge to the discharge capacity Cs
DC power supply circuit is arranged in Cs.The DC power supply circuit includes resistance Rs, telegraph key K, DC power supply DC, wherein the resistance
One end is connect with one end of the capacitor Cs, and the other end of the resistance is connect with the telegraph key K, the telegraph key K and described straight
The one end in galvanic electricity source connects, and the other end of the DC power supply is connect with the other end of the capacitor Cs.The energy absorption branch
Road mainly includes arrester, uses MOV (metal oxide varistor) Zinc-Oxide Arrester in embodiment, takes shelter from the thunder and absorb system
System absorbs the generated dump energy in the moving process of the mechanical switch, and then realizes and protect to the overvoltage of mechanical switch
Shield.The present invention is using MOV Zinc-Oxide Arrester as illustrative lightning-arrest absorption system, it is not limited to being kept away with MOV zinc oxide
Thunder device is all to absorb the energy absorption circuit of dump energy or system in branch and be used equally for this as lightning-arrest absorption system
Invention.The main solid-state switch branch, the auxiliary solid-state switch branch, the mechanical switch branch and the energy absorption branch
It is connected in parallel.
The switching circuit is when operating normally to establish the connection between power supply and load, in the mechanical switch branch
Mechanical switch closure, the main solid-state switch in the main solid-state switch branch disconnects, the auxiliary solid-state switch branch
The auxiliary solid-state switch in road disconnects, and electric current flows through the mechanical switch under this state.
The separating brake control process of composite switch circuit based on coupling negative pressure circuit described in embodiment is as follows: control institute
The main solid-state switch conducting in main solid-state switch branch is stated, such as is led by controlling the controlled thyristor in main solid-state switch
Conducting that is logical and realizing main solid-state switch, and send separating brake order to mechanical switch described in the mechanical switch branch and indicate institute
State mechanical switch separating brake.When the clearance between open contacts of the mechanical switch reach 2-3 millimeters (mm), it is believed that the mechanical switch has reached
It opens to effective away from the thyristor S controlled in the negative pressure circuit at this time is connected.At this point, the capacitor Cs and the mutual inductance
The winding of device forms oscillation, and forms a negative pressure in the change of current branch by the winding, and change of current branch is connected integrally
Pressure drop is lower than the mechanical switch arc voltage, so that impressed current is transferred to the change of current branch by the mechanical switch branch, this
Electric current transfer is completed in Shi Suoshu mechanical switch branch current zero passage blow-out.Between the mechanical switch separating brake moves to its contact
When gap is able to bear corresponding transient recovery voltage, controls the main solid-state switch and disconnect, the energy that route generates at this time is by institute
The MOV Zinc-Oxide Arrester stated in energy absorption branch absorbs, and main switching switching current drops to zero, and separating brake process is completed.
The separating brake control process of composite switch circuit based on coupling negative pressure circuit described in embodiment is as follows:
It is connected main solid-state switch, and mechanical switch is given to send out separating brake order, reach 2 in the clearance between open contacts of the mechanical switch~
When 3 millimeters (mm), the thyristor S conducting in negative pressure circuit is closed in control, and the capacitor Cs in negative pressure circuit and mutual inductor Ls is sent out at this time
Raw oscillation, and a negative pressure is coupled in change of current branch by the mutual inductor Ls, keep the change of current branch entirety conduction voltage drop low
In the arc voltage of the mechanical switch, so that impressed current is transferred to the change of current branch, the machine by the mechanical switch branch
Electric current transfer is completed in tool switching branches current over-zero blow-out.Moving to its contact gap in the mechanical switch separating brake can hold
When by corresponding transient recovery voltage, the main solid-state switch shutdown is controlled, such as controllable in main solid-state switch by controlling
Thyristor disconnects and realizes the shutdown of main solid-state switch, and route energy is absorbed by MOV at this time, and main switching switching current drops to
Zero.
The shutting-brake control process of composite switch circuit based on coupling negative pressure circuit described in embodiment is as follows:
Order of closing a floodgate is issued to the auxiliary solid-state switch of auxiliary solid-state switch branch, orders the auxiliary solid-state switch conducting, at this time
Electric current flows through the auxiliary solid-state switch branch.Then the mechanical switch closure in mechanical switch branch is controlled, electric current also can at this time
The mechanical switch is flowed through, the auxiliary solid-state switch being then turned off in above-mentioned auxiliary solid-state switch branch, electric current only passes through described at this time
Mechanical switch.
Embodiment additionally provides a kind of switch block, and which employs the above-mentioned composite switch electricity based on coupling negative pressure circuit
Road.For in three-phase alternating current system, the circuit of each phase is respectively adopted above-mentioned based on coupling negative pressure circuit the switch block
Composite switch circuit.As shown in figure 3, the switch block is negative based on coupling using above-mentioned in A phase, B phase, C phase respectively
The composite switch circuit of volt circuit: the A phase, B phase, C phase in main switching switch block is (for three with standby switching switch in figure
Phase line is distinguished, and A1, B1, C1 indicate A phase, B phase, C phase line) it has been all made of the above-mentioned composite switch based on coupling negative pressure circuit
Circuit；A phase, B phase, C phase in standby switching switch block is (for the triple line differentiation with main switching switch, A2, B2, C2 in figure
To indicate A phase, B phase, C phase line) equally it has been all made of the above-mentioned composite switch circuit based on coupling negative pressure circuit.
As shown in figure 3, embodiment additionally provides a kind of automatic transfer switch device, the automatic transfer switch device includes
Two above-mentioned switch blocks, switch based on one of them switch block, another be standby switching switch block.Course of normal operation
In, the main switching switch block conducting realizes that power supply provides electric current to the load by the main switching switch block；Institute
Standby switching switch block is stated to disconnect.It breaks down and needs power supply being switched to standby switching switch block from main switching switch block
When, the main switching switch block is disconnected by above-mentioned separating brake control process, and by described in the connection of above-mentioned shutting-brake control process
Standby switching switch block.
The present embodiment with dual power supply redundancy power supply system come illustrate it is above-mentioned based on coupling the hybrid of negative pressure circuit cut automatically
The control for changing switching device uses.But it should be clear that above-described embodiment based on coupling negative pressure circuit it is hybrid from
Dynamic converting switch device is not limited in dual power supply redundancy power supply system, more power supply redundancy power supply systems and general such as single
Electric supply system, electric system that switch can be used etc. can be used described in above-described embodiment based on coupling negative pressure electricity
The hybrid automatic transfer switch device on road.
Dual power supply redundancy power supply system structural schematic diagram according to an embodiment of the present invention as shown in Figure 4.The dual power supply
Power supply system includes power supply, Control protection system, automatic transfer switch device, load and is made of monitoring components such as sensors
Monitoring system, wherein power supply includes two sets of power supplys of working power and backup power source, the master in the automatic transfer switch device
Switching switch block is connect with working power, standby switching switch block is connect with backup power source.Dual power supply redundancy power supply system
The main switching switch block of working power branch road and/or the standby switching switch block of backup power source branch road can make in system
LC described in above-described embodiment based on solid-state switch vibrates forced commutation type combined type automatic transfer switch component.This implementation
Example is with the switching switch of working power branch road and the switching switch of backup power source branch road using above-mentioned based on coupling negative pressure
It is illustrated for the hybrid automatic transfer switch component of circuit.
Dual power supply redundancy power supply system is under normal power supply state, working power branch in the automatic transfer switch device
Main switching switch block in all switching circuits (switching circuit namely on A, B, C phase line) be in closed form
The electric power of state, working power is supplied to the load by the converting switch device；And in the automatic transfer switch device
All switching circuits (switching circuit namely on A, B, C phase line) in the standby switching switch block of backup power source branch are equal
It is in an off state, the backup power source does not provide electric power to the load.
The monitoring systems stay or the working condition for periodically monitoring entire power supply system, such as the abnormal feelings in system
Condition: the sensor monitoring in the working condition of the sensor monitoring power supply in working power branch, backup power source branch is standby
With the working condition of the sensor monitoring load in the working condition of power supply, load branch circuit.
When the monitoring system detection is to working power failure or excessive pressure drop, to Control protection system send it is corresponding therefore
Hinder signal.Control protection system judges work after receiving the expression working power out of order signal that monitoring system is sent
Make power supply failure, needs for power supply to be switched on backup power source from working power.At this point, the control in Control protection system
Unit sends separating brake order to the switching switch block of working power and sends life of closing a floodgate to the switching switch block of backup power source
Enable, so that the switching switch block for controlling working power disconnects, and control the switching switch block closure of backup power source with
The electrical connection between backup power source and load is established, to provide electric power by backup power source case load.
When normal operation, all mechanical switch in main switching switch block in A phase, B phase and C phase line are in closed form
State, the electric current in each phase line flow through respective mechanical switch and provide electric power to load.Monitor that working power is sent out in sensor
When raw failure, warning message is sent to Control protection system.Control after receiving the warning message, in Control protection system
The mechanical switch of main switching switch block of the unit into the automatic transfer switch device issues separating brake order, in the machinery
When switch contact is opened away from 2~3mm is reached, thyristor S conducting in negative pressure circuit is closed in control, and capacitor Cs and mutual inductor Ls vibrate, lead to
It crosses the mutual inductor Ls and couples a negative pressure in change of current branch, change of current branch entirety conduction voltage drop is made to be lower than mechanical switch arc voltage,
To which impressed current is transferred to change of current branch by mechanical switch branch, mechanical switch branch current zero passage blow-out is completed electric current and is turned
It moves.When the mechanical switch separating brake moves to contact gap and is able to bear corresponding transient recovery voltage, main solid-state switch is closed
Disconnected, route energy is absorbed by MOV at this time, and main switching switching current drops to zero；Simultaneously to the auxiliary solid-state switch of standby switching switch
Order of closing a floodgate is issued, then load is closed the mechanical switch of standby switching switch by standby switching switch power supply, and disconnect standby switching and open
The auxiliary solid-state switch closed.The making process of standby switching switch block is completed, and is opened to realize the switching in backup power source branch
The combined floodgate for closing device, so that standby working power powers to the load.
Electric power is provided to load from backup power source in the dual power supply redundancy power supply system to be switched to from working power to institute
The process of load offer electric power is provided and is switched to from working power to load offer electric power from backup power source to the load and is provided
The process of electric power is similar, and details are not described herein.
Sensor in load branch circuit can send the fault message monitored after monitoring that the load breaks down
To Control protection system.The Control protection system can close working power branch and backup power source according to the fault message
Switching switch block in branch is powered with disconnecting any power supply to the load.
The monitoring system detects switching simultaneously and cut-offs state, and status information feedback is returned the Control protection system,
To ensure to cut-off and be connected.
Control protection system to the control of other interconnection switches or receives other contacts and opens also according to received information realization
The status information of pass, and received all information are sent to remote computer, while letter can be received from remote computer
Breath, such as the related switching switch of control carry out the information of closure or openness.
Illustrated by taking three-phase alternating current as an example in embodiment, but it should be recognized by those skilled in the art that
In the case where basic inventive concept of the invention, switching circuit of the invention, switching device, system and its control method
It is not limited in the three-phase alternating current based on exemplary illustration purpose in specification, switching circuit of the invention, is at switching device
System and its control method are suitable for the including but not limited to system of direct current and alternating current.
It should be understood that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.Front and back two
Do not necessarily imply that it must is a kind of sequence successively executed between a step, as long as being able to solve technical problem of the invention
, and do not necessarily implied that between former and later two steps and centainly eliminate other steps unlisted in invention, and
Before main device, auxiliary device not necessarily indicate that main and auxiliary, the first device and the second device not necessarily indicate in specification
Sequence afterwards, is used only for distinguishing；Similarly, not necessarily meaning is a kind of direct electricity between each component, assembly unit of system
Gas connection, what specification indicated is only logical relation.Although the present invention is described in detail referring to the foregoing embodiments,
Those skilled in the art should understand that: it can still repair technical solution documented by foregoing embodiments
Change or equivalent replacement of some of the technical features；And these are modified or replaceed, and do not make corresponding technical solution
Essence departs from the spirit and scope of the technical scheme of various embodiments of the present invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (13)
1. a kind of composite switch circuit based on coupling negative pressure circuit, which is characterized in that
The composite switch circuit includes mechanical switch branch, change of current branch, auxiliary solid-state switch branch and energy absorption branch
Road, the change of current branch include main solid-state switch branch and the concatenated coupling negative pressure circuit of the main solid-state switch branch, wherein
Solid-state switch in the auxiliary solid-state switch branch includes the electronic power switch of reverse parallel connection；
Solid-state switch in the auxiliary solid-state switch branch has multiple, and is connected in series；
Solid-state switch in the main solid-state switch branch includes electronic power switch/diode inverse parallel circuit and capacitor, institute
It is in parallel with the capacitor to state electronic power switch/diode inverse parallel circuit, specifically: the first electronic power switch/diode
Inverse parallel circuit and the second electronic power switch/diode inverse parallel circuit are connected in series to form the first series circuit, third electricity
Power electronic switch/diode inverse parallel circuit and four electronic power switches/diode inverse parallel circuit are connected in series to form
Two series circuits, first series circuit and the second series circuit are in parallel with a capacitor；
Solid-state switch in the main solid-state switch branch has multiple, and is connected in series；
Wherein,
The mechanical switch branch, the change of current branch, the auxiliary solid-state switch branch and the energy absorption branch circuit parallel connection connect
It connects；
The coupling negative pressure circuit includes coupling coil, thyristor and discharge capacity, wherein
Second winding of the thyristor, discharge capacity and the coupling coil is formed into a loop；
The discharge capacity is provided with DC power supply circuit, and the DC power supply circuit includes resistance, telegraph key, DC power supply,
Described in one end of resistance connect with one end of the capacitor, the other end of the resistance is connect with the telegraph key, the telegraph key
It is connect with one end of the DC power supply, the other end of the DC power supply is connect with the other end of the capacitor；
The composite switch circuit is in making process:
Control the auxiliary solid-state switch branch conducting；
The mechanical switch branch conducting is controlled, the auxiliary solid-state switch branch is controlled and disconnects；
The composite switch circuit is used for during separating brake:
Main solid-state switch branch conducting is controlled, control mechanical switch branch disconnects；
Control the conducting of negative pressure circuit；
Main solid-state switch branch is controlled to disconnect.
2. composite switch circuit according to claim 1, which is characterized in that
The first winding of coupling coil of the coupling negative pressure circuit is located at the main solid-state switch branch；The of the coupling coil
Two windings are located at the discharge capacity circuit, and the thyristor, discharge capacity and second winding are formed into a loop.
3. composite switch circuit according to claim 1, which is characterized in that
The mechanical switch branch includes mechanical switch；And/or
The energy absorption branch includes arrester.
4. composite switch circuit according to claim 1, which is characterized in that
The electronic power switch includes but is not limited to thyristor, IGBT or IGCT.
5. a kind of switching circuit control method, applied to any mixing based on coupling negative pressure circuit of claim 1-4
Formula switching circuit, which is characterized in that
Main solid-state switch branch conducting is controlled, control mechanical switch branch disconnects；
Control the conducting of negative pressure circuit；
Main solid-state switch branch is controlled to disconnect.
6. switching circuit control method according to claim 5, which is characterized in that
The contact of mechanical switch in the mechanical switch branch, which reaches, effectively to be opened away from rear, control negative pressure circuit conducting.
7. switching circuit control method according to claim 5 or 6, which is characterized in that
Negative pressure circuit is connected by controlling the turn on thyristors in the negative pressure circuit.
8. switching circuit control method according to claim 5, which is characterized in that
When the contact gap of mechanical switch in the mechanical switch branch is able to bear transient recovery voltage, the master is controlled
Solid-state switching circuits disconnect.
9. a kind of switching circuit control method, applied to any mixing based on coupling negative pressure circuit of claim 1-4
Formula switching circuit, which is characterized in that
Control the auxiliary solid-state switch branch conducting；
The mechanical switch branch conducting is controlled, the auxiliary solid-state switch branch is controlled and disconnects.
10. a kind of automatic transfer switch device, which is characterized in that the automatic transfer switch device includes main switching switch block
With standby switching switch block, wherein
It is described it is main switching switch block include three as described in claim 1-4 is any based on couple negative pressure circuit it is hybrid
Switching circuit is respectively used in the A phase, B phase, C phase branch of three-phase electricity；
The standby switching switch block include three as described in claim 1-4 is any based on coupling the hybrid of negative pressure circuit
Switching circuit is respectively used in the A phase, B phase, C phase branch of three-phase electricity.
11. a kind of power supply switch protecting system, which is characterized in that
The power protection switching system includes:
Working power and backup power source；
Automatic transfer switch device as claimed in claim 10, the main switching switch block in the automatic transfer switch device
It is connect with working power, standby switching switch block is connect with backup power source；
Monitoring system, the working condition for monitoring power supply and/or backup power source；
Control protection system is opened according to any switching circuit control method control automatic switchover of claim 5-8
Close main switching switch block and/or standby switching switch block separating brake and/or switch according to claim 9 electricity in device
Road control method controls main switching switch block and/or standby switching switch block in the automatic transfer switch device and closes a floodgate.
12. power supply switch protecting system according to claim 11, which is characterized in that
The monitoring system is also used to for the information of the working condition being sent to the Control protection system, the control protection
System controls the automatic transfer switch device in the main switching switch block and standby switching switch block according to the information
Between switch.
13. power supply switch protecting system according to claim 11 or 12, which is characterized in that
The monitoring system also detects the switch closing and switch opening state of the automatic transfer switch, and the information of the state is fed back
To the Control protection system.
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| US11270854B2 (en) * | 2018-12-26 | 2022-03-08 | Eaton Intelligent Power Limited | Circuit protection devices, systems and methods for explosive environment compliance |
| US10903649B1 (en) * | 2019-07-25 | 2021-01-26 | Abb Schweiz Ag | Static transfer switch with turn off circuit |
| CN112383128A (en) * | 2020-09-17 | 2021-02-19 | 北京电力设备总厂有限公司 | Coupling negative pressure formula high voltage direct current breaker energy supply system |
| EP4303902A1 (en) * | 2021-03-30 | 2024-01-10 | Huawei Digital Power Technologies Co., Ltd. | Circuit breaker and power supply system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201369603Y (en) * | 2009-02-17 | 2009-12-23 | 泉州纪超电子有限公司 | Intelligent type dual-power switching circuit |
| CN204425031U (en) * | 2015-02-13 | 2015-06-24 | 国家电网公司 | A kind of intelligent diverter switch |
| CN106300301A (en) * | 2016-10-12 | 2017-01-04 | 清华大学 | Two-way mechanical formula dc circuit breaker based on change of current drive circuit and control method thereof |
| CN106300291A (en) * | 2016-08-27 | 2017-01-04 | 天津大学 | Hybrid high voltage DC breaker based on IGBT |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680411B (en) * | 2016-03-29 | 2018-04-06 | 中国人民解放军海军工程大学 | DC solid circuit breaker and breaking control method |
| CN106356834B (en) * | 2016-09-27 | 2018-05-11 | 西安交通大学 | A kind of magnetic coupling conversion type carry circuit and its application method |
-
2017
- 2017-10-25 CN CN201711007803.XA patent/CN107769369B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201369603Y (en) * | 2009-02-17 | 2009-12-23 | 泉州纪超电子有限公司 | Intelligent type dual-power switching circuit |
| CN204425031U (en) * | 2015-02-13 | 2015-06-24 | 国家电网公司 | A kind of intelligent diverter switch |
| CN106300291A (en) * | 2016-08-27 | 2017-01-04 | 天津大学 | Hybrid high voltage DC breaker based on IGBT |
| CN106300301A (en) * | 2016-10-12 | 2017-01-04 | 清华大学 | Two-way mechanical formula dc circuit breaker based on change of current drive circuit and control method thereof |
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