CN105990066B - Dc circuit breaker, direct current interruption equipment and control method - Google Patents
Dc circuit breaker, direct current interruption equipment and control method Download PDFInfo
- Publication number
- CN105990066B CN105990066B CN201510044109.XA CN201510044109A CN105990066B CN 105990066 B CN105990066 B CN 105990066B CN 201510044109 A CN201510044109 A CN 201510044109A CN 105990066 B CN105990066 B CN 105990066B
- Authority
- CN
- China
- Prior art keywords
- controllable
- current
- circuit breaker
- control
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
A kind of dc circuit breaker of present invention offer, direct current interruption equipment and control method, the dc circuit breaker include：Controllable, around the coil windings and control unit for being located at the controllable periphery；Wherein, the both ends of the coil windings are respectively electrically connected to the output end of controllable electric power；Described control unit is electrically connected with the controllable electric power, the output current for controlling the controllable electric power to the coil windings；The controllable, for in the coil windings by curent change by change conductivity.The dc circuit breaker and direct current interruption equipment provided through the invention accurately continuously adjusts the conductivity of the controllable by the electric current in control coil winding, to effectively reduce electric arc, improves the stability and reliability of direct current interruption.
Description
Technical field
The present invention relates to a kind of power electronics field more particularly to dc circuit breaker, direct current interruption equipment and controls
Method.
Background technology
With more and more D.C. high voltage transmissions (high-voltage direct current, abbreviation HVDC) system
Development, it is anticipated that the high-voltage direct current power grid of interconnection will be widely used.But in practical applications, since DC current does not have
Natural zero-crossing point, therefore when electric current is turned off, cannot achieve natural arc extinguishing.
In this regard, Fig. 1 is a kind of existing structural schematic diagram of dc circuit breaker, as shown in Figure 1, when normally, switch
K3It disconnects, dc circuit breaker is not activated, and all electric currents flow through switch K2, while power supply UdcFor capacitance C2Charging.Based on the direct current
Breaker, as switch K2When shutdown, corresponding arc voltage is begun to ramp up, in switch K2Shut-off contact be turned off after one
In timing section, switch K is controlled3It is connected, then capacitance C2Backward voltage pass through inductance L2It is applied to switch K2Electric arc, with enhancing
Oscillation.When superimposed current zero passage, switch K is controlled2Shutdown, then the energy in inductance gradually will be transferred to capacitance C2, until capacitance
C2Voltage be higher than varistor MOV2Rated voltage, correspondingly, varistor MOV2It starts to work, to absorb energy, finally
So that electric current is gradually decreased to zero, then switch K is controlled3Shutdown.But under D.C. high voltage transmission scene, since electric current disconnected
The energy generated in journey is high, therefore can not disperse energy all in feed(er) reactor by varistor.
Invention content
In view of this, the present invention proposes a kind of dc circuit breaker, direct current interruption equipment and control method, for solving height
The problem of can not reliably carrying out direct current interruption under pressure direct current transportation scene.
A kind of embodiment according to the present invention proposes a kind of dc circuit breaker, including：One controllable, including one
A hollow insulator and connection terminal set on hollow insulator both ends；The both ends of one coil windings, coil windings are electric respectively
It is connected to the output end of a controllable electric power；One control unit, control unit are electrically connected with controllable electric power, controllable for controlling
Output current of the power supply to coil windings；Be filled with magnetorheological fluid in wherein hollow insulator, the conductivity of magnetorheological fluid with
In coil windings by electric current variation by change.
The dc circuit breaker that the above embodiment provides is by controlling output of the controllable electric power to the coil windings
Electric current accurately continuously controls the conductivity of magnetorheological fluid, to effectively reduce electric arc, improves the stabilization of direct current interruption
Property and reliability.
A kind of advantageous embodiment according to the present invention, the dc circuit breaker further include：One the first controllable switch,
One end of first controllable switch is electrically connected with the connection terminal of controllable one end, the other end of the first controllable switch and controllable list
The connection terminal of first other end is electrically connected, and the control terminal of the first controllable switch is electrically connected with control unit, in control unit
Control under on or off.By the way that first controllable switch in parallel with controllable is arranged, when needing that current path is made to be in
When normally state, it is in the conduction state that control unit can control the first controllable switch, forms short circuit path, to effectively
The heat for reducing loss and generating.
A kind of advantageous embodiment according to the present invention, the dc circuit breaker further include：One the second controllable switch,
Second controllable switch is connected with controllable, and the control terminal of the second controllable switch is electrically connected with control unit, for single in control
On or off under the control of member.By setting and concatenated second controllable switch of controllable, when needing direct current interruption,
Control unit is by adjusting the electric current in coil windings, by the current reduction in access where dc circuit breaker to less than certain value
Later, the second controllable switch is turned off, is complete switched off to realize, improves the reliability of direct current interruption.
A kind of advantageous embodiment according to the present invention, the dc circuit breaker further include：One Overvoltage protecting unit,
One end of Overvoltage protecting unit is electrically connected with controllable connection terminal, the other end of Overvoltage protecting unit and controllable list
Another connection terminal electrical connection of member.By the way that Overvoltage protecting unit is arranged, can absorb in the dc circuit breaker in entire work
Make the energy generated in the process, realize overload protection, to further reliablely and stablely realize direct current interruption.
A kind of advantageous embodiment according to the present invention, the hollow insulator are the cylinder of hollow insulation.To
Make Distribution of Magnetic Field around hollow insulator evenly, to optimize the on state characteristic of controllable.
The present invention also provides a kind of direct current interruption equipment, including：Current sensor, disconnecting switch, processor, Yi Jiru
The preceding dc circuit breaker；The current sensor is connected with the disconnecting switch and the dc circuit breaker, for measuring
Flow through the electric current of the dc circuit breaker；The processor is electrically connected with the current sensor and described control unit respectively,
For the electric current for detecting the current sensor measurement be more than preset load current value when, control described control unit by
The output current of decrescence small controllable electric power, so that the conductivity of magnetorheological fluid is gradually reduced；The processor is also isolated with described
Switch electrical connection is additionally operable to when the electric current for detecting the current sensor measurement is less than preset safe current value, control
The disconnecting switch shutdown.
Direct current interruption equipment provided by the invention by controlling the output current of the controllable electric power to the coil windings,
The conductivity for accurately continuously adjusting magnetorheological fluid is detecting the electric current for flowing through dc circuit breaker less than preset safe current
When value, controls the disconnecting switch shutdown and improve direct current interruption to effectively reduce electric arc on the basis of realizing direct current interruption
Stability and reliability.
The present invention also provides a kind of control methods for controlling foregoing direct current interruption equipment conducting, including：
Processor controls the disconnecting switch conducting；The output current of control unit control controllable electric power makes its increase, so that magnetorheological
The conductivity of liquid increases, until the electric current that current sensor measurement obtains increases to preset operating current.
The control method for controlling foregoing direct current interruption equipment conducting that embodiments of the present invention provide, energy
Enough realize the conducting of direct current interruption equipment.
Embodiments of the present invention additionally provide a kind of control for controlling foregoing direct current interruption equipment shutdown
Method, including：The output current that controllable electric power is controlled in the first moment control unit is gradually reduced, so that the conductance of magnetorheological fluid
Rate is gradually reduced, until after the electric current that current sensor measurement obtains decreases below preset safe current value, processor control
Disconnecting switch processed shutdown, first moment be when the electric current of current sensor measurement is more than preset load current value when
It carves.
The control method disconnected for controlling foregoing direct current interruption equipment that embodiments of the present invention provide, energy
It is enough to effectively reduce electric arc on the basis of realizing direct current interruption, improve the stability and reliability of direct current interruption.
Dc circuit breaker, direct current interruption equipment and the control method that embodiments of the present invention provide, including controllable,
Around the coil windings and control unit for being located at the controllable periphery, coil windings are electrically connected to controllable electric power, with it is described can
The control unit for controlling power electric connection, it is accurate continuous by controlling output current of the controllable electric power to the coil windings
Ground adjusts the conductivity of the controllable, to effectively reduce electric arc, improves the stability and reliability of direct current interruption.
Description of the drawings
Detailed description of the present invention embodiment below with reference to accompanying drawings, in attached drawing：
Fig. 1 is a kind of existing structural schematic diagram of existing dc circuit breaker；
Fig. 2 is the structural schematic diagram for the dc circuit breaker that the embodiment of the present invention one provides；
Fig. 3 is magnetorheological fluid in the embodiment of the present invention one with the Particle Distribution state change map of changes of magnetic field；
Fig. 4 is the structural schematic diagram of dc circuit breaker provided by Embodiment 2 of the present invention；
Fig. 5 is the structural schematic diagram for the dc circuit breaker that the embodiment of the present invention three provides；
Fig. 6 is the structural schematic diagram for the direct current interruption equipment that the embodiment of the present invention four provides；
Fig. 7 is the structural schematic diagram for the direct current interruption equipment that the embodiment of the present invention five provides；
Fig. 8 is the flow signal of the control method for controlling the direct current interruption equipment conducting in the embodiment of the present invention
Figure；
Fig. 9 is the flow signal for controlling the control method that the direct current interruption equipment disconnects in the embodiment of the present invention
Figure.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, further to the present invention by the following examples
It is described in detail.
Fig. 2 is the structural schematic diagram for the dc circuit breaker that the embodiment of the present invention one provides, as shown in Fig. 2, dc circuit breaker 1
Including：One controllable 11, controllable 11 include a hollow insulator 111 and the connection set on hollow insulator both ends
Terminal 112,113；One coil windings 12, the both ends of coil windings 12 are respectively electrically connected to the output of a controllable electric power 14
End；One control unit 13, control unit 13 are electrically connected with controllable electric power 14, for controlling controllable electric power 14 to coil windings 12
Output current；Magnetorheological fluid 114 is filled in wherein hollow insulator, the conductivity of magnetorheological fluid 114 is with coil windings
In by electric current variation by change.
Specifically, dc circuit breaker 1 can be applied in any power transmission or electric power distribution system, such as apply
In high-voltage direct current or middle straightening streaming system, for working as the over proof value of electric current or the other needs in the system applied
Its internal electric current of quick-speed turning on-off when the case where drop-out current occurs, to protect system not to be damaged.
It is appreciated that the magnetorheological fluid of conductivity, energy can be changed with the curent change in coil windings by setting
Enough realize to the conduction state of dc circuit breaker accurately control and adjust.In practical applications, control unit can root
According to preset controlling curve, the conductivity of magnetorheological fluid, i.e., the conductivity of the described controllable so that controllable is in spy are controlled
Reach suitable resistance at the time of determining, by being gradually reduced the conductivity of controllable, effectively avoids generating excessive arc energy
Amount, to be reliably achieved direct current interruption.It should be noted that the scheme based on the present embodiment, during direct current interruption, by
It accurately can continuously change in the conductivity of controllable, therefore negatively affected caused by electrical arcing can be effectively reduced.
Specifically, magnetorheological fluid (Magnetorheological Fluid, abbreviation MR fluid) is generally applied to machinery
Field, therefore at present the research of the material is limited to how to reinforce it respectively mostly to shearing force intensity, and to the conductance of the material
Rate rarely has research.And this programme dexterously applies magnetorheological fluid in dc circuit breaker, is made to effectively reduce electrical arcing
At negative effect, also, the controllable in this programme is not related to mechanical moving structure, because being lost without moving,
Good reliability and can Reusability, service life is long, while also having electromagnetic response time quickly, can rapid cut-off current.
Specifically, in order to which controllable to be electrically connected with other elements, the both ends of the hollow insulator are respectively equipped with connection
Terminal, the connection terminal can be made of an electrically conducting material.
Wherein, magnetorheological fluid is a kind of SMART FLUID in carrying object, usually oily state fluid, its main feature is that, it is magnetorheological
The conductivity of liquid can change with the variation of surrounding magnetic field.Specifically, Fig. 3 be the embodiment of the present invention one in magnetorheological fluid with
The Particle Distribution state change map of changes of magnetic field, as shown in figure 3, under normal circumstances, the magnetic particle in magnetorheological fluid is random
It is suspended in carrier oil to distribution, referring specifically to the first from left figure in Fig. 3, the conductivity of magnetorheological fluid is very low at this time, can be approximate
For state of insulation, wherein the magnetic particle is usually micron, nano level sphere or spheroid.When there are external magnetic field,
Under magnetic fields, the magnetic particle in the magnetorheological fluid, for example, 0.1-10 microns of magnetic particle, the effect in magnetic field
Under will gradually change distribution distribution, referring specifically to the second from left figure in Fig. 3, arrow indicates the direction of magnetic field line, magnetic current in figure
The magnetic particle become in liquid will gradually tend to arrange along the magnetic line of force under magnetic fields, the conductivity and apparent viscosity of magnetorheological fluid
It can gradually increase, ultimately form the distribution as shown in one figure of the right side in Fig. 3, i.e., the magnetic particle in magnetorheological fluid is along magnetic
The line of force arranges, correspondingly, the conductivity and its apparent viscosity of the magnetorheological fluid are very high at this time, becomes viscoelastic solid, can be approximate
For conduction state.
Optionally, in order to make the Distribution of Magnetic Field around hollow insulator 111 evenly, to optimize the conducting of controllable 11
Characteristic, hollow insulator 111 are specifically as follows the cylinder of hollow insulation.
Specifically, in the present embodiment, in order to which the conductivity to the magnetorheological fluid controls, to control direct current interruption
The working condition of device, the coil windings around the hollow insulator can be provided a controllable electric power, the controllable electric power and control
Unit connects, specifically, the controllable electric power can be controlled power of direct current.Correspondingly, control unit can be by described in control
The current strength that controllable electric power is exported to coil windings realizes that the magnetic field intensity generated to the coil windings controls, in turn
Control the conductivity of the magnetorheological fluid under the magnetic fields that the coil windings generate.That is, being based on this implementation
The scheme of example, the current strength that control unit exports by adjusting controllable electric power to coil windings adjust the coil windings production
Raw magnetic field intensity, and then the continuous conductivity for being accurately controlled magnetorheological fluid.
Correspondingly, be based on the dc circuit breaker provided in this embodiment, when needing to control the dc circuit breaker conducting
When, the corresponding control method that is connected includes：The output current for controlling controllable electric power 14 increases, until the electricity in dc circuit breaker 1
Stream increases to preset operating current.Wherein, operating current is in normal work shape for the system applied when dc circuit breaker
When under state, pass through the current value of the DC circuit device.
Correspondingly, be based on the dc circuit breaker provided in this embodiment, when needing to control the dc circuit breaker shutdown
When, the corresponding control method that turns off includes：The output current of control controllable electric power 14 is gradually reduced, so that in dc circuit breaker 1
Electric current be gradually reduced.
Dc circuit breaker provided in this embodiment, including controllable, around be located at the coil of the controllable periphery around
Group and control unit, coil windings are electrically connected to controllable electric power, and the control unit being electrically connected with the controllable electric power passes through control
The controllable electric power accurately continuously adjusts the conductivity of the controllable to the output current of the coil windings, to
Electric arc is effectively reduced, the stability and reliability of direct current interruption are improved.
Fig. 4 is the structural schematic diagram of dc circuit breaker provided by Embodiment 2 of the present invention, as shown in figure 4, according to aforementioned
Dc circuit breaker described in one embodiment one, dc circuit breaker 1 further include：One Overvoltage protecting unit 15, Overvoltage protecting unit
15 one end is electrically connected with a connection terminal 112 of controllable 11, the other end and controllable of Overvoltage protecting unit 15
11 another connection terminal 113 is electrically connected.The Overvoltage protecting unit 15 in parallel with controllable 11.
Overvoltage protecting unit 15 is in parallel with controllable 11.Overvoltage protecting unit 15 can absorb dc circuit breaker and work
The energy generated in the process realizes overvoltage protection.
Optionally, Overvoltage protecting unit 15 can be realized by numerous embodiments, for example, rheostat, capacitance etc. have
The component of energy absorption.Specifically, in the present embodiment, Overvoltage protecting unit 15 may include the pressure-sensitive electricity of metal oxide
It hindering (Metal Oxide Varistor, abbreviation MOV), MOV is a kind of votage limit type protection device, using the nonlinear characteristic of MOV,
When overvoltage appears in two interpolars of MOV, MOV can by voltage clamping to a relatively-stationary voltage value, to protection with
Its device in parallel is not damaged by overvoltage, realizes energy absorption.Specifically, one end of MOV can be connected to connecting pin
Son 112, the other end is connected to connection terminal 113.MOV is small and to absorb the characteristic of energy preferable, therefore can be more reliably
Realize direct current cutout open circuit.
Dc circuit breaker provided in this embodiment can be absorbed disconnected in the direct current by the way that Overvoltage protecting unit 15 is arranged
The energy that road device generates in whole work process realizes overload protection, to further reliablely and stablely realize direct current interruption.
Fig. 5 is the structural schematic diagram for the dc circuit breaker that the embodiment of the present invention three provides, as shown in figure 5, according to aforementioned
Dc circuit breaker described in one embodiment, dc circuit breaker 1 further include：
One the first controllable switch 16, one end of the first controllable switch 16 and a connection terminal 112 of controllable 11
Electrical connection, the other end of the first controllable switch 16 are electrically connected with another connection terminal 113 of controllable 11, the first controllable switch
16 control terminal is electrically connected with control unit 13, for the on or off under the control of control unit 13.First controllable switch
16 is in parallel with controllable 11.
In practical applications, although the conductivity of the magnetorheological fluid 114 in controllable 11 reaches under magnetic fields
When maximum value, still there is non-zero impedance, therefore by high current, it would be possible to lead to the energy that can not ignore
Loss, while the problem of how radiating can be also brought.In this regard, in the present embodiment, it is in parallel with controllable 11 by being arranged
First controllable switch 16, when needing that current path is made to be in normally state, it is controllable that control unit 13 can control first
Switch 16 is in the conduction state, to form short circuit, correspondingly, electric current can be directly connected by the first controllable switch 16, from
And effectively reduce the heat of loss and generation.
Specifically, in normal operation, electric current flows through the first controllable switch 16 in the conduction state, when direct current is disconnected
When access where the device of road needs shutdown, then control unit 13 controls the shutdown of the first controllable switch 16, current to flow a current through
Controllable 11 in the conduction state.It should be noted that while the first controllable switch 16 turns off, due to controllable
11 in impedance be in the on-state non-zero, correspondingly, certain voltage can be generated on the first controllable switch 16.Cause
This, the first controllable switch 16 needs quickly turn off, to reduce the pressure and electric arc that generate.Later, control unit 13 by by
Current strength decrescence in small coil windings 12, to reduce the magnetic field of the generation of coil windings 12, gradually to increase controllable
11 impedance, correspondingly, the electric current flowed through on 1 place access of dc circuit breaker will be gradually reduced.
Correspondingly, be based on the dc circuit breaker provided in this embodiment, when needing to control the dc circuit breaker conducting
When, the corresponding control method that is connected includes：The conducting of the first controllable switch 16 is controlled, and the output current for controlling controllable electric power 14 increases
Greatly, until the electric current in dc circuit breaker 1 increases to preset operating current.Wherein, operating current is when dc circuit breaker institute
When the system of application is under normal operating conditions, pass through the current value of the DC circuit device.
Correspondingly, be based on the dc circuit breaker provided in this embodiment, when needing to control the dc circuit breaker shutdown
When, the corresponding control method that turns off includes：Control the shutdown of the first controllable switch 16, and control the output current of controllable electric power 14 by
It is decrescence small, so that the electric current in dc circuit breaker 1 is gradually reduced.
Dc circuit breaker provided in this embodiment, by the way that first controllable switch 16 in parallel with controllable 11 is arranged, when
When needing that current path is made to be in normally state, control unit 13 can control the first controllable switch 16 and be on shape
State forms short circuit path, to effectively reduce the heat of loss and generation.
Fig. 6 is the structural schematic diagram for the dc circuit breaker that the embodiment of the present invention four provides, as shown in fig. 6, according to aforementioned
Dc circuit breaker described in one embodiment, the dc circuit breaker further include：One the second controllable switch 17, the second controllable switch
17 connect with controllable 11, and the control terminal of the second controllable switch 17 is electrically connected with control unit 13, in control unit 13
Control under on or off.With 11 concatenated second controllable switch 17 of controllable, the second controllable switch 17 is also single with control
Member 11 is electrically connected, for the on or off under the control of control unit 13.
Specifically, one end of the second controllable switch 17 is connected to the connection terminal 112 of controllable 11, and the other end can connect
The terminal for being used to be electrically connected with peripheral circuit element to dc circuit breaker 1, the terminal is for the dc circuit breaker 1 to be electrically connected to
The specified location for the electric system (not shown) applied, on main line.
In practical applications, the conductivity of the magnetorheological fluid in controllable 11 can reach minimum in no magnetic fields
Value, but it possibly can not be complete switched off, that is to say, that still there may be smaller electric current to pass through.In this regard, in the present embodiment, leading to
Setting and 11 concatenated second controllable switch 17 of controllable are crossed, when needing to carry out direct current interruption, is passed through in control unit 13
The electric current in coil windings 12 is adjusted, the conductivity of controllable 11 is adjusted to be below certain value, thus by dc circuit breaker 1
Current reduction in the access of place is to less than after certain value, and control unit 13 controls the shutdown of the second controllable switch 17, to complete
The fully closed current path that breaks.
Correspondingly, be based on the dc circuit breaker provided in this embodiment, when needing to control the dc circuit breaker conducting
When, the corresponding control method that is connected includes：The conducting of the second controllable switch 17 is controlled, and the output current for controlling controllable electric power 14 increases
Greatly, until the electric current in dc circuit breaker 1 increases to preset operating current.
Correspondingly, be based on the dc circuit breaker provided in this embodiment, when needing to control the dc circuit breaker shutdown
When, the corresponding control method that turns off includes：The output current of control controllable electric power 14 is gradually reduced, so that in dc circuit breaker 1
Electric current be gradually decrease to less than after certain value, control the second controllable switch 17 shutdown.
Dc circuit breaker provided in this embodiment, by setting with 11 concatenated second controllable switch 17 of controllable, when
It, will be in access where dc circuit breaker in control unit 13 by adjusting the electric current in coil windings 12 when needing direct current interruption
Current reduction to less than after certain value, turn off the second controllable switch 17, complete switched off to realize, improve direct current interruption
Reliability.
Fig. 7 is the structural schematic diagram for the direct current interruption equipment that the embodiment of the present invention five provides, as shown in fig. 7, the direct current
Switchgear includes：Current sensor 2, disconnecting switch 3, processor 4 and the direct current interruption as described in aforementioned any embodiment
Device 1.Current sensor 2 is connected with disconnecting switch 3 and dc circuit breaker 1, for measuring the electric current for flowing through dc circuit breaker 1；Place
Device 4 is managed, is electrically connected respectively with current sensor 2 and control unit 13, for detecting that the electric current that current sensor 2 measures is big
When preset load current value, control control unit 13 is gradually reduced the output current of controllable electric power 14, so that magnetorheological fluid
114 conductivity is gradually reduced；Processor 4 is also electrically connected with disconnecting switch 3, is additionally operable to detecting the measurement of current sensor 2
Electric current be less than preset safe current value when, control disconnecting switch 3 turn off.
Wherein, load current value is used to limit the range of safety operation for the electric system that dc circuit breaker is applied, specifically
, if the electric current in access where dc circuit breaker is more than the load current value, the electrical part in the electric system can be caused
Damage.
Wherein, safe current value is for limiting the current range that can carry out direct current interruption safely, specifically, in access
Electric current less than DC channel is turned off after the safe current value, can be to avoid the generation of electrical arcing.
Controller 4 can be any type of control device, for example, micro-control unit (Micro Control Unit, letter
Claim MCU), programmable controller, digital signal processor etc..
Based on the direct current interruption equipment provided in this embodiment, Fig. 8 is described straight for controlling in the embodiment of the present invention
The flow diagram of the control method of switchgear conducting is flowed, as shown in figure 8, when needing to control the dc circuit breaker conducting
When, the corresponding control method that is connected includes：101, processor control disconnecting switch 3 is connected；102, control unit 13 controls controllably
The output current of power supply 14 makes its increase, so that the conductivity of magnetorheological fluid 114 increases, is obtained until current sensor 2 measures
Electric current increase to preset operating current.
Wherein, operating current is when the system that dc circuit breaker is applied is under normal operating conditions, by described
The current value of DC circuit device.
Specifically, the both ends of current sensor 2, the entire cascaded structure constituted with disconnecting switch 3 and dc circuit breaker 1 are set
There is connection terminal, which is used to be connected to the specified location of applied electric system (not shown), such as main
On circuit, for when the over proof value of the electric current in the system applied or other need drop-out current the case where occur when
Its internal electric current of quick-speed turning on-off, to protect system not to be damaged.
Based on the direct current interruption equipment provided in this embodiment, Fig. 9 is described straight for controlling in the embodiment of the present invention
The flow diagram of the control method of switchgear shutdown is flowed, as shown in figure 9, when needing to control the dc circuit breaker shutdown
When, for example, when detecting in the circuit that dc circuit breaker 1 is applied, when electric current is more than load current value, corresponding shutdown control
Method includes：103, the output current that controllable electric power is controlled in the first moment control unit is gradually reduced, so that magnetorheological fluid
Conductivity is gradually reduced, until after the electric current that current sensor measurement obtains decreases below preset safe current value, processing
Device control disconnecting switch shutdown, the first moment be current sensor measurement electric current be more than preset load current value when
It carves.
Wherein, load current value is used to limit the range of safety operation for the electric system that dc circuit breaker is applied, specifically
, if the electric current in access where dc circuit breaker is more than the load current value, the electrical part in the electric system can be caused
Damage.Wherein, safe current value is that can carry out the current range of direct current interruption safely, specifically, the electric current in access is low
DC channel is turned off after the safe current value, it can be to avoid the generation of electrical arcing.
Direct current interruption equipment provided in this embodiment, including current sensor, disconnecting switch, processor and direct current are disconnected
Road device, the dc circuit breaker include controllable, around the coil windings and control unit for being located at the controllable periphery, line
Circle winding is electrically connected to controllable electric power, and the control unit being electrically connected with the controllable electric power, control unit is by can described in control
Output current of the power supply to the coil windings is controlled, the conductivity of the controllable is accurately continuously adjusted, to effectively subtract
Small electric arc improves the stability and reliability of direct current interruption.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (7)
1. a kind of dc circuit breaker, including：
One controllable, including a hollow insulator and the connection terminal set on hollow insulator both ends；
One coil windings, the both ends of coil windings are respectively electrically connected to the output end of a controllable electric power；With
One control unit, control unit are electrically connected with controllable electric power, for controlling output electricity of the controllable electric power to coil windings
Stream；
One end of one the first controllable switch, the first controllable switch is electrically connected with the connection terminal of controllable one end, and first can
The other end of control switch is electrically connected with the connection terminal of the controllable other end, the control terminal and control unit of the first controllable switch
Electrical connection is used on or off under the control of the control unit,
Be filled with magnetorheological fluid in wherein hollow insulator, the conductivity of magnetorheological fluid in coil windings by electric current
Change and changes.
2. dc circuit breaker according to claim 1, the dc circuit breaker further include：
One the second controllable switch, the second controllable switch are connected with controllable, and the control terminal of the second controllable switch and control are single
Member electrical connection, on or off under the control of the control unit.
3. dc circuit breaker according to claim 1 or 2, the dc circuit breaker further include：
One Overvoltage protecting unit, one end of Overvoltage protecting unit are electrically connected with controllable connection terminal, and overvoltage is protected
The other end of shield unit is electrically connected with another connection terminal of controllable.
4. dc circuit breaker according to claim 1 or 2, hollow insulator is the cylinder of hollow insulation.
5. a kind of direct current interruption equipment, including：Current sensor, disconnecting switch, processor and any one of such as claim 1-4
The dc circuit breaker, wherein：
The current sensor is connected with the disconnecting switch and the dc circuit breaker, and the direct current interruption is flowed through for measuring
The electric current of device；
The processor is electrically connected with the current sensor and described control unit respectively, for detecting the electric current biography
When the electric current that sensor measures is more than preset load current value, control described control unit is gradually reduced the output electricity of controllable electric power
Stream, so that the conductivity of magnetorheological fluid is gradually reduced；
The processor is also electrically connected with the disconnecting switch, is additionally operable to detecting that the electric current of the current sensor measurement is low
When preset safe current value, the disconnecting switch shutdown is controlled.
6. a kind of control method for controlling direct current interruption equipment conducting as claimed in claim 5, the method includes：
Processor controls the disconnecting switch conducting；With
The output current of control unit control controllable electric power makes its increase, so that the conductivity of magnetorheological fluid increases, until electric current
The electric current that sensor measurement obtains increases to preset operating current.
7. a kind of control method for controlling direct current interruption equipment shutdown as claimed in claim 5, the method includes：
The output current that controllable electric power is controlled in the first moment control unit is gradually reduced, so that the conductivity of magnetorheological fluid is gradual
Reduce, until after the electric current that current sensor measurement obtains decreases below preset safe current value, processor control isolation
Switch OFF, first moment be current sensor measurement electric current be more than preset load current value when at the time of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510044109.XA CN105990066B (en) | 2015-01-28 | 2015-01-28 | Dc circuit breaker, direct current interruption equipment and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510044109.XA CN105990066B (en) | 2015-01-28 | 2015-01-28 | Dc circuit breaker, direct current interruption equipment and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105990066A CN105990066A (en) | 2016-10-05 |
| CN105990066B true CN105990066B (en) | 2018-08-10 |
Family
ID=57036485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510044109.XA Active CN105990066B (en) | 2015-01-28 | 2015-01-28 | Dc circuit breaker, direct current interruption equipment and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105990066B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108535140B (en) * | 2018-04-09 | 2019-11-12 | 福州大学 | A kind of magnetorheological fluid response characteristics testing device and its method |
| CN112447440A (en) * | 2020-11-10 | 2021-03-05 | 安徽合凯电气科技股份有限公司 | Medium-voltage zero-crossing control module |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6157095A (en) * | 1998-12-04 | 2000-12-05 | Delphi Technologies, Inc. | Control circuit for inductive loads |
| FR2930655B1 (en) * | 2008-04-29 | 2013-02-08 | Commissariat Energie Atomique | EFFORT RETURN INTERFACE WITH ENHANCED SENSATION |
| CN104037025A (en) * | 2014-07-01 | 2014-09-10 | 重庆材料研究院有限公司 | Magnetic control time-delay device |
-
2015
- 2015-01-28 CN CN201510044109.XA patent/CN105990066B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6157095A (en) * | 1998-12-04 | 2000-12-05 | Delphi Technologies, Inc. | Control circuit for inductive loads |
| FR2930655B1 (en) * | 2008-04-29 | 2013-02-08 | Commissariat Energie Atomique | EFFORT RETURN INTERFACE WITH ENHANCED SENSATION |
| CN104037025A (en) * | 2014-07-01 | 2014-09-10 | 重庆材料研究院有限公司 | Magnetic control time-delay device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105990066A (en) | 2016-10-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10229794B2 (en) | Circuit breaker for interrupting DC current using magnetic field | |
| EP3156874B1 (en) | Voltage-clamping circuit | |
| EP2999075A1 (en) | Power supply with surge voltage protection | |
| CN101860035A (en) | Reactive compensation system of thyristor controlled magnetically controlled reactor | |
| EP3906572B1 (en) | Systems and methods for regulating a power draw from an induction power harvester (iph) | |
| CN105990066B (en) | Dc circuit breaker, direct current interruption equipment and control method | |
| US10218170B2 (en) | Current-limiting device utilizing a superconductor for a current-limiting operation | |
| US9633811B2 (en) | Circuit breaker for hierarchically controlling short-circuit current and trips | |
| CN105745724B (en) | The short-circuit device of electric device and system for eliminating the electric arc in device | |
| CN104377695A (en) | Series capacitor compensation device, power transmission circuit and TRV suppressing method | |
| CN103337850A (en) | High-voltage DC gas breaker with wide current range | |
| EP2601658B1 (en) | A core | |
| CN108736747A (en) | A kind of high-power medium voltage DC source device and control method | |
| CN205028881U (en) | U type fuse | |
| CN205069547U (en) | Parameter circuit breaker that short -circuit current hierarchical control was threaded off | |
| WO2013139382A1 (en) | Current control apparatus | |
| CN107783035A (en) | Test load, generator loading experimental rig and its load test method | |
| CN117957736A (en) | Apparatus and method for breaking high voltage direct current with fuse and oscillating current overload system | |
| CN207457439U (en) | A kind of 500KA dynamical thermal stability test loop apparatus using coaxial cable system | |
| CN118572637A (en) | Superconductor current limiting device and aircraft comprising such a device | |
| AU2014246683B2 (en) | Adjustable voltage-clamping circuit | |
| KR20120097359A (en) | Power saver for power quality | |
| CN203179795U (en) | Solution circuit for non-synchronized parallel relays | |
| CN203205823U (en) | Three-phase voltage regulator with load protection device | |
| CN110070999A (en) | Circuit-breaker sub-assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |