CN108879620A - Dc circuit breaker and its application method based on the transfer of mechanical switch arc voltage - Google Patents
Dc circuit breaker and its application method based on the transfer of mechanical switch arc voltage Download PDFInfo
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- CN108879620A CN108879620A CN201810819005.5A CN201810819005A CN108879620A CN 108879620 A CN108879620 A CN 108879620A CN 201810819005 A CN201810819005 A CN 201810819005A CN 108879620 A CN108879620 A CN 108879620A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims abstract description 149
- 238000002955 isolation Methods 0.000 claims description 28
- 239000003990 capacitor Substances 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 12
- 230000007423 decrease Effects 0.000 claims description 9
- 230000006870 function Effects 0.000 claims description 9
- 230000000875 corresponding effect Effects 0.000 claims description 5
- 238000004880 explosion Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 3
- 230000008033 biological extinction Effects 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 2
- 230000001934 delay Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 15
- 230000008901 benefit Effects 0.000 description 6
- 238000010891 electric arc Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
Abstract
Disclose a kind of dc circuit breaker based on the transfer of mechanical switch arc voltage and using method, dc circuit breaker includes main current loop, transfer current branch and energy consuming circuitry, and main current loop, transfer current branch and energy consuming circuitry are in parallel, and the main current loop is composed in series by being isolated with high speed machine disconnecting switch S1 and transfer with high speed machine switch S2；First power semiconductor (A1) is connected with the second power semiconductor (A2), and the third power semiconductor (A3) is connected with the 4th power semiconductor (A4)；Power semiconductor (A5) is connected between first end point and the second endpoint, buffer circuit (A6) is connected between third endpoint and the 4th endpoint, energy consuming circuitry is made of in series and parallel one or more MOV, and energy consuming circuitry is connected between the third endpoint and the 4th endpoint.
Description
Technical field
The present invention relates to technical field of electric equipment, in particular to the direct current interruption based on the transfer of mechanical switch arc voltage
Device and its application method.
Background technique
The hybrid circuit-breaker being made of high speed machine switch with power semiconductor is big with discharge capacity, turns off speed
The advantages that degree is fast, current limiting capacity is strong, has become the research hotspot that hicap cut-offs field.Function is controlled entirely using having
The hybrid dc circuit breaker scheme of power semiconductor breaking current has breaking speed compared to other hybrid schemes
Faster, more conducively disjunction rated current the advantages of.But when using full-control type power semiconductor breaking current, it usually needs
Full-control type power semiconductor is connected with mechanical switch realizes electric current transfer, and specified through-flow loss is high, constrain its promote with
Using.
For Traditional DC breaker after the completion of disjunction, mechanical switch needs to be resistant to shutdown voltage, due to mechanical breaker medium
Dielectric strength restores insufficient, is easy to happen repeated breakdown and disjunction is caused to fail.
Capacitator charging circuit in traditional transfer circuit is connected directly with major loop, is not isolated, interrupting process fills
Power supply and major loop can interfere, and very high for the resistance to pressure request of major loop charge power supply, and it is unreliable to cut-off.
Disclosed above- mentioned information are used only for enhancing the understanding to background of the present invention in the background section, it is thus possible to
Information comprising not constituting the prior art known to a person of ordinary skill in the art in home.
Summary of the invention
In view of the deficiency of the prior art or defect, the purpose of the present invention is give reality by the following technical programs
It is existing.
An aspect of of the present present invention, it is a kind of based on mechanical switch arc voltage transfer dc circuit breaker include principal current return
Road, transfer current branch and energy consuming circuitry, and main current loop, transfer current branch and energy consuming circuitry are in parallel,
The main current loop is by isolation high speed machine disconnecting switch S1 and transfer high speed machine switch S2 series connection group
At；
The transfer current branch one or more solid-state switch is composed in series, and the solid-state switch is partly led by the first power
Body device, the second power semiconductor, third power semiconductor, the 4th power semiconductor, the 5th power are partly led
Body device and buffer circuit composition, wherein：
First power semiconductor is connected with the second power semiconductor, the third power semiconductor
It connects with the 4th power semiconductor；Have between first power semiconductor and second power semiconductor
There is first end point；There is the second endpoint between the third power semiconductor and the 4th power semiconductor；Institute
Stating has third endpoint between the first power semiconductor and the third power semiconductor；Second power is partly led
There is the 4th endpoint between body device and the 4th power semiconductor；The power semiconductor is connected to described
Between end point and second endpoint, buffer circuit is connected between the third endpoint and the 4th endpoint,
Energy consuming circuitry is made of in series and parallel one or more MOV, and energy consuming circuitry is connected to the third endpoint and described
Between four endpoints.
In the dc circuit breaker based on the transfer of mechanical switch arc voltage, the isolation is isolated with high speed machine
Switch S1 and/or transfer high speed machine switch S2 includes that one or more high speed machine switch is series-parallel, and the isolation is used
High speed machine switch S1 is to have arc disjunction or thick-less vane, and the transfer is empty with the arc-chutes medium of high speed machine switch S2
Gas, SF6, N2 or H2.
In the dc circuit breaker based on the transfer of mechanical switch arc voltage, the isolation is isolated with high speed machine
Switch S1 and/or transfer high speed machine switch S2 is that the high speed machine based on electromagnetic repulsion force is switched, driven based on high-speed motor
Mechanical switch or based on explosion driving high speed machine switch, isolation is SF6 with the arc-chutes medium of high speed machine switch S1
Or vacuum.
In the dc circuit breaker based on the transfer of mechanical switch arc voltage, the first power semiconductor device
Part, the second power semiconductor, third power semiconductor or the 4th power semiconductor are uncontrollable or have partly
The one-way conduction power semiconductor or combinations thereof of function is controlled, the 5th power semiconductor is with switch off current energy
The all-controlling power electronics device of power.
In the dc circuit breaker based on the transfer of mechanical switch arc voltage, buffer circuit is connected to described first
Between endpoint and second endpoint, energy consuming circuitry is connected between the first end point and second endpoint.
In the dc circuit breaker based on the transfer of mechanical switch arc voltage, the buffer circuit is by capacitor, electricity
The group of resistance or one or more of power semiconductor is combined into, and the power semiconductor is not control or the list of half control
To conducting power semiconductor.
It is described based on mechanical switch arc voltage transfer dc circuit breaker in, the buffer circuit include capacitor,
Resistance and power semiconductor, the capacitor is in series with a resistor, and the power semiconductor is in parallel with a resistor.
It is described based on mechanical switch arc voltage transfer dc circuit breaker in, the buffer circuit include capacitor and
Resistance, the capacitor are in series with a resistor.
It is described based on mechanical switch arc voltage transfer dc circuit breaker in, under normal operating conditions, electric current from
The main current circuit flows through, the first power semiconductor, the second power semiconductor, third in solid-state switching circuits
Power semiconductor, the 4th power semiconductor, the 5th power semiconductor are in off state, the transfer electricity
Stream branch does not have electric current to pass through；
When system is cut-off, the high speed machine switch in the main current circuit carries out separating brake movement,
Since high speed machine switch is there are mechanical delay, when separating brake movement is made, the high speed machine switch contact still in
Closed state；Power half in the transfer current branch is determined by the current amplitude and change rate that measure the main current circuit
Whether conductor device acts and corresponding action sequence.
According to another aspect of the present invention, a kind of dc circuit breaker based on the transfer of mechanical switch arc voltage
Application method includes the following steps：
In the first step, when system operates normally, electric current is all flowed through from main current circuit, and short circuit event occurs for system
Barrier, main current circuit electric current are begun to ramp up, and when being more than system short-circuit threshold value, transfer high speed machine switch S2 first starts to move
Make or isolation is moved at the same time with high speed machine switch S1 and transfer high speed machine switch S2；
In the second step, after transfer starting the arc between high speed machine switch S2 contact, in control conducting solid-state switching circuits
Power semiconductor open, transfer current branch conducting utilizes main current circuit transfer high speed machine switch S2
Arc voltage pass through the electric current of main circuit to transfer current branch fast transfer；
In third step, when main circuit current is fully transferred to transfer current branch, control isolation high speed machine every
It leaves and closes S1 separating brake, separating brake, main circuit are electric simultaneously alternatively, isolation is with high speed machine switch S1 and transfer high speed machine switch S2
Arc extinction and mechanical breaker is formed when stream is fully transferred to transfer current branch, between isolation high speed machine switch S1 contact；
In four steps, when dielectric insulation intensity is resistant to cut-off electricity enough between the contact of high speed machine disconnecting switch S1
Pressure controls power semiconductor shutdown in solid-state switching circuits, and electric current is shifted to buffer circuit, when buffer circuit voltage is more than
The on state threshold voltage of energy consuming circuitry MOV, energy consuming circuitry conducting；Electric current starts to shift to energy consuming circuitry；
In the 5th step, electric current is fully transferred to energy consuming circuitry, and the voltage at breaker both ends reaches peak at this time, is
Breaker both ends overvoltage peak value in interrupting process；Hereafter, the electric current in energy consuming circuitry will be begun to decline, the electricity at breaker both ends
Pressure also starts slowly to decline, when system power is less than the minimum conducting electric current of energy consuming circuitry；Energy consuming circuitry is closed, energy consuming circuitry
Both end voltage declines rapidly, and the electric current in energy consuming circuitry is zero, and breaker cut-offs completion, and the voltage at breaker both ends is reduced to system
Voltage.
The advantages of invention, is as follows：Main current circuit only exists mechanical switch, and unregulated power electronic device is through-flow, no on-state damage
Consumption is not necessarily to cooling measure；It is real respectively using high speed machine switch and high speed machine disconnecting switch by optimizing Topology Structure Design
The fast transfer and tolerance disjunction voltage of existing electric current, greatly reduce the design requirement of single mechanical switch, are conducive to breaker
Project Realization.
The above description is only an overview of the technical scheme of the present invention, in order to make technological means of the invention clearer
Understand, reach the degree that those skilled in the art can be implemented in accordance with the contents of the specification, and in order to allow the present invention
Above and other objects, features and advantages can be more clearly understood, illustrated below with a specific embodiment of the invention
Explanation.
Detailed description of the invention
By reading the detailed description in hereafter preferred embodiment, various other advantages and benefits of the present invention
It will become apparent to those of ordinary skill in the art.Figure of description only for the purpose of illustrating preferred embodiments,
And it is not to be construed as limiting the invention.It should be evident that drawings discussed below is only some embodiments of the present invention,
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Other attached drawings.And throughout the drawings, identical component is presented with like reference characters.
In the accompanying drawings：
Fig. 1 is the structure of the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
Schematic diagram；
When Fig. 2 is the dc circuit breaker work according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
Structural schematic diagram；
Fig. 3 is the disjunction of the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
Transfer circuit current signature schematic diagram when electric current；
Fig. 4 (a) to Fig. 4 (e) each circuital current flow direction when being breaker breaking current according to an embodiment of the invention
Figure；
Fig. 5 is the disjunction of the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
Current curve figure in each circuit when electric current；
Fig. 6 is the structure of the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
Schematic diagram；
Fig. 7 is the structure of the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
Schematic diagram；
Fig. 8 is the structure of the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
Schematic diagram；
Fig. 9 is the structure of the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
Schematic diagram；
Figure 10 is the knot of the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
Structure schematic diagram；
Figure 11 is the knot of the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
Structure schematic diagram；
Figure 12 (a) to Figure 12 (c) is according to an embodiment of the invention based on the straight of mechanical switch arc voltage transfer
Flow the structural schematic diagram of the buffer circuit of breaker；
Figure 13 is making for the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
With the step schematic diagram of method.
Below in conjunction with drawings and examples, the present invention will be further explained.
Specific embodiment
1 to Figure 13 specific embodiment that the present invention will be described in more detail below with reference to accompanying drawings.Although being shown in attached drawing
Specific embodiments of the present invention, it being understood, however, that may be realized in various forms the reality of the invention without that should be illustrated here
Example is applied to be limited.On the contrary, providing these embodiments is to be able to thoroughly understand the present invention, and can will be of the invention
Range is fully disclosed to those skilled in the art.
It should be noted that having used some vocabulary in the specification and claims to censure specific components.Ability
Field technique personnel it would be appreciated that, technical staff may call the same component with different nouns.This specification and right
It is required that not in such a way that the difference of noun is as component is distinguished, but with the difference of component functionally as differentiation
Criterion."comprising" or " comprising " as mentioned throughout the specification and claims are an open language, therefore should be solved
It is interpreted into " including but not limited to ".Specification subsequent descriptions are to implement better embodiment of the invention, so the description be with
For the purpose of the rule of specification, the range that is not intended to limit the invention.Protection scope of the present invention is when the appended right of view
It is required that subject to institute's defender.
In order to facilitate understanding of embodiments of the present invention, it is done by taking several specific embodiments as an example below in conjunction with attached drawing further
Explanation, and each attached drawing does not constitute the restriction to the embodiment of the present invention.
Fig. 1 is that the structure of the dc circuit breaker based on the transfer of mechanical switch arc voltage of one embodiment of the present of invention is shown
It is intended to, the embodiment of the present invention will be specifically described in conjunction with Fig. 1.
As shown in Figure 1, a kind of dc circuit breaker based on the transfer of mechanical switch arc voltage includes main current loop, transfer
Current branch and energy consuming circuitry, and main current loop, transfer current branch and energy consuming circuitry are in parallel,
The main current loop is by isolation high speed machine disconnecting switch S1 and transfer high speed machine switch S2 series connection group
At；
The transfer current branch one or more solid-state switch is composed in series, and the solid-state switch is partly led by the first power
Body device A1, the second power semiconductor A2, third power semiconductor A3, the 4th power semiconductor A4, the 5th
Power semiconductor A5 and buffer circuit A6 composition, wherein：
The first power semiconductor A1 connects with the second power semiconductor A2, the third power semiconductor
Device A3 connects with the 4th power semiconductor A4；The first power semiconductor A1 and second power semiconductor
There is first end point between device A2；Between the third power semiconductor A3 and the 4th power semiconductor A4
With the second endpoint；There is third end between the first power semiconductor A1 and the third power semiconductor A3
Point；There is the 4th endpoint between the second power semiconductor A2 and the 4th power semiconductor A4；The function
Rate semiconductor devices A5 is connected between the first end point and second endpoint, and buffer circuit A6 is connected to the third end
Between point and the 4th endpoint,
Energy consuming circuitry is made of in series and parallel one or more MOV, and energy consuming circuitry is connected to the third endpoint and described
Between four endpoints.
For a further understanding of the present invention, Fig. 2 is according to an embodiment of the invention based on mechanical switch arc voltage
Structural schematic diagram when the dc circuit breaker work of transfer, being shifted based on mechanical switch arc voltage for the present embodiment are hybrid
Dc circuit breaker, in order to better illustrate breaker breaking course, this gives circuit breaker currents to flow from left to right
Structural schematic diagram, as shown in Figure 2.
The main current circuit is by the isolation series connection of high speed machine disconnecting switch S1 and transfer high speed machine switch S2
Composition, the isolation are composed in parallel with high speed machine disconnecting switch S1 and transfer with high speed machine switch S2 by one or more.
The transfer circuit is made of in series and parallel one or more solid-state switches；Solid-state switch is by the first power semiconductor A1,
Two power semiconductor A2, third power semiconductor A3, the 4th power semiconductor A4, the 5th power semiconductor device
Part A5, buffer circuit A6 composition.The energy consuming circuitry is made of in series and parallel one or more MOV.
The isolation high speed machine switch S1 can be to have arc disjunction or thick-less vane, and arc-chutes medium is SF6 or vacuum；
The arc-chutes medium of the transfer high speed machine switch S2 is air, SF6 or vacuum.
The connection relationship of the solid-state switching circuits is：The first power semiconductor A1 and the second power semiconductor
Device A2 series connection, the third power semiconductor A3 connect with the 4th power semiconductor A4；First power half
There is first end point between conductor device A1 and the second power semiconductor A2；The third power semiconductor A3
There is the second endpoint between the 4th power semiconductor A4；
There is third endpoint between the first power semiconductor A1 and the third power semiconductor A3；Institute
Stating has the 4th endpoint between the second power semiconductor A2 and the 4th power semiconductor A4；The power is partly led
Body device A5 is connected between the first end point and second endpoint.The buffer circuit A6 and energy consuming circuitry MOV has more
Kind connection implementation, buffer circuit A6 be connected between the first end point and second endpoint or the third endpoint and
Between 4th endpoint, energy consuming circuitry MOV is connected between the first end point and second endpoint or the third end
Between point and the 4th endpoint.
The first power semiconductor A1, the second power semiconductor A2, third power semiconductor A3,
Four power semiconductor A4 are uncontrollable or one-way conduction power semiconductor with half control function or combinations thereof, including
But it is not limited to Power Diode Pumped, any one or any number of combinations in thyristor.The 5th power semiconductor device
Part A5 is the all-controlling power electronics device with switch off current ability, including but not limited in IGCT, IGBT, IEGT and GTO
Any one or any number of combinations.
The isolation and transfer high speed machine switch are switched for the high speed machine based on electromagnetic repulsion force, are driven based on high-speed motor
Dynamic mechanical switch or the high speed machine switch based on explosion driving.
The buffer circuit is combined by the group of one or more of capacitor C, resistance R, power semiconductor D, institute
Stating power semiconductor D is not control or the one-way conduction power semiconductor of half control.
The connection relationship of the buffer circuit is：The capacitor C connects with resistance R, the power semiconductor D and electricity
Resistance R parallel connection or the capacitor C connect with resistance R, are not necessarily to the power semiconductor D.
Under normal operating conditions, electric current is flowed through from the main current circuit；At this point, the first power in solid-state switching circuits
Semiconductor devices A1, the second power semiconductor A2, third power semiconductor A3, the 4th power semiconductor A4,
5th power semiconductor A5 is in off state, and the transfer circuit does not have electric current to pass through；
When system is cut-off, the high speed machine switch in the main current circuit carries out separating brake movement,
Since high speed machine switch is there are mechanical delay, when separating brake movement is made, the high speed machine switch contact still in
Closed state；Power semiconductor in the transfer circuit is determined by the current amplitude and change rate that measure the main current circuit
Whether device acts and corresponding action sequence.
It is of the present invention based on mechanical switch arc voltage transfer dc circuit breaker preferred embodiment in, it is described every
Include one or more high speed machine switch series from high speed machine disconnecting switch S1 and/or transfer high speed machine switch S2
Parallel connection, the isolation high speed machine switch S1 are to have arc disjunction or thick-less vane, and the transfer is with high speed machine switch S2's
Arc-chutes medium is air, SF6, N2 or H2.
It is of the present invention based on mechanical switch arc voltage transfer dc circuit breaker preferred embodiment in, it is described every
From with high speed machine disconnecting switch S1 and/or transfer high speed machine switch S2 be based on electromagnetic repulsion force high speed machine switch,
Mechanical switch based on high-speed motor driving or the high speed machine switch based on explosion driving, isolation is with high speed machine switch S1's
Arc-chutes medium is SF6 or vacuum.
In the preferred embodiment of dc circuit breaker of the present invention based on the transfer of mechanical switch arc voltage, described the
One power semiconductor A1, the second power semiconductor A2, third power semiconductor A3 or the 4th power semiconductor
Device A4 is uncontrollable or one-way conduction power semiconductor with half control function or combinations thereof, and the 5th power is partly led
Body device A5 is the all-controlling power electronics device with switch off current ability.
In the preferred embodiment of dc circuit breaker of the present invention based on the transfer of mechanical switch arc voltage, buffering electricity
Road A6 is connected between the first end point and second endpoint, and energy consuming circuitry is connected to the first end point and described second
Between endpoint.
It is described slow in the preferred embodiment of dc circuit breaker of the present invention based on the transfer of mechanical switch arc voltage
The group for rushing one or more of electric routing capacitance C, resistance R or power semiconductor D is combined into, the power semiconductor device
Part D is not control or the one-way conduction power semiconductor of half control.
It is described slow in the preferred embodiment of dc circuit breaker of the present invention based on the transfer of mechanical switch arc voltage
Rushing circuit includes capacitor C, resistance R and power semiconductor D, and the capacitor C connects with resistance R, the power semiconductor device
Part D is in parallel with resistance R.
It is described slow in the preferred embodiment of dc circuit breaker of the present invention based on the transfer of mechanical switch arc voltage
Rushing circuit includes capacitor C and resistance R, and the capacitor C connects with resistance R.
In the preferred embodiment of dc circuit breaker of the present invention based on the transfer of mechanical switch arc voltage, normal work
Make under state, electric current is flowed through from the main current circuit, the first power semiconductor A1, the second function in solid-state switching circuits
Rate semiconductor devices A2, third power semiconductor A3, the 4th power semiconductor A4, the 5th power semiconductor A5
It is in off state, the transfer current branch does not have electric current to pass through；
When system is cut-off, the high speed machine switch in the main current circuit carries out separating brake movement,
Since high speed machine switch is there are mechanical delay, when separating brake movement is made, the high speed machine switch contact still in
Closed state；Power half in the transfer current branch is determined by the current amplitude and change rate that measure the main current circuit
Whether conductor device acts and corresponding action sequence.
Fig. 3 is the disjunction of the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
Transfer circuit current signature schematic diagram when electric current, each branch current mark of transfer circuit when Fig. 3 also shows breaking current,
Middle i1 is the electric current for flowing through main current circuit, and i2 is the electric current for flowing through transfer circuit, and i3 is the electric current for flowing through circuit A5, and i4 is stream
Electric current through buffer circuit A6, i5 are the electric current for flowing through energy consuming circuitry A7.
Each branch current direction in transfer circuit when Fig. 4 (a) to Fig. 4 (e) shows breaking current, it is specific for it is corresponding from
Each branch current direction at t0 to t6 each moment.Fig. 5 shows the current curve of each branch when breaking current.Specific behaviour
It include the following aspects as step：
When system operates normally, electric current is all flowed through from main current circuit；
Short trouble occurs for t0 moment, system, and main current circuit electric current is begun to ramp up.When electric current is more than system short-circuit threshold value
When, control system movement, high speed machine starts to act, when the presence due to mechanical delay, lift one's head still in closed state；
T1 moment, mechanical contact pull open, and electric arc is generated between fracture, and the electric current for flowing through main current circuit turns to transfer circuit
It moves；
T2 moment, main circuit current are wholly or largely transferred to transfer circuit；Transfer circuit bears whole short circuit currents,
And short circuit current is gradually increasing, control high speed machine disconnecting switch is opened；
The t3 moment, when dielectric insulation is restored to tolerance system overvoltage enough, control between the contact of high speed machine disconnecting switch
Power semiconductor A5 is turned off in solid-state switching circuits processed, and electric current is shifted to buffer circuit A6；
T4 moment, buffer circuit A6 voltage are more than energy consuming circuitry on state threshold voltage, energy consuming circuitry A7 conducting；Electric current starts
It is shifted to energy consuming circuitry；
T5 moment, electric current are fully transferred to energy consuming circuitry, and the voltage at breaker both ends reaches peak at this time, to cut-off
Breaker both ends overvoltage peak value in journey；Hereafter, the electric current in energy consuming circuitry will be begun to decline, and the voltage at breaker both ends is also opened
Begin slowly to decline, when system power is less than the minimum conducting electric current of energy consuming circuitry；Energy consuming circuitry is closed, energy consuming circuitry both ends electricity
Pressure decline rapidly；
At the t6 moment, the electric current in energy consuming circuitry is zero, and breaker cut-offs completion, and the voltage at breaker both ends is reduced to system electricity
Pressure.
The high speed machine transfer or disconnecting switch are that the high speed machine based on electromagnetic repulsion force is switched, driven based on high-speed motor
Dynamic mechanical switch or the high speed machine switch based on explosion driving.
The power semiconductor that there is full control function include in IGBT, IGCT, IEGT and GTO any one or
Any number of combination of person.
Fig. 6 to Figure 11, which is shown, uses the devices such as specific device IGBT, IGCT, IEGT, thyristor, diode as power
The specific implementation of the specific connection type of the circuits such as semiconductor devices and primary circuit, buffer circuit in magnetic coupling shift module
Example.
Figure 12 (a) to Figure 12 (c) gives the situation of the buffer circuit various combination.
In addition to situation shown in figure, present invention does not require the circuit in breaker is completely symmetrical.
Figure 13 is making for the dc circuit breaker according to an embodiment of the invention based on the transfer of mechanical switch arc voltage
With the step schematic diagram of method, a kind of application method of the dc circuit breaker based on the transfer of mechanical switch arc voltage includes following
Step：
In first step S1, when system operates normally, electric current is all flowed through from main current circuit, and short circuit event occurs for system
Barrier, main current circuit electric current are begun to ramp up, and when being more than system short-circuit threshold value, transfer high speed machine switch S2 first starts to move
Make or isolation is moved at the same time with high speed machine switch S1 and transfer high speed machine switch S2；
In second step S2, after transfer starting the arc between high speed machine switch S2 contact, control conducting solid-state switching circuits
In power semiconductor A5 open, transfer current branch conducting is opened using main current circuit transfer with high speed machine
The arc voltage for closing S2 passes through the electric current of main circuit to transfer current branch fast transfer；
In third step S3, when main circuit current is fully transferred to transfer current branch, isolation high speed machine is controlled
Disconnecting switch S1 separating brake, alternatively, isolation high speed machine switch S1 and transfer high speed machine switch S2 while separating brake, main circuit
It arc extinction and is formed mechanical disconnected when electric current is fully transferred to transfer current branch, between isolation high speed machine switch S1 contact
Mouthful；
In the fourth step s 4, when between the contact of high speed machine disconnecting switch S1 dielectric insulation intensity be resistant to cut-off enough
Voltage controls power semiconductor A5 shutdown in solid-state switching circuits, and electric current is shifted to buffer circuit A6, when buffer circuit electricity
Pressure is more than the on state threshold voltage of energy consuming circuitry MOV, energy consuming circuitry conducting；Electric current starts to shift to energy consuming circuitry；
In the 5th step S5, electric current is fully transferred to energy consuming circuitry, and the voltage at breaker both ends reaches peak at this time,
For breaker both ends overvoltage peak value in interrupting process；Hereafter, the electric current in energy consuming circuitry will be begun to decline, breaker both ends
Voltage also starts slowly to decline, when system power is less than the minimum conducting electric current of energy consuming circuitry；Energy consuming circuitry is closed, energy consumption electricity
Road both end voltage declines rapidly, and the electric current in energy consuming circuitry is zero, and breaker cut-offs completion, and the voltage at breaker both ends, which is reduced to, is
System voltage.
In the present invention, when breaker needs drop-out current, the high speed machine switch by controlling main current circuit is pulled open
Electric arc is generated, while the power semiconductor of transfer circuit is acted by certain timing, transfer circuit is connected, can significantly improve
The reliability cut-off.Main current circuit does not have power electronic devices, and without through-flow loss, transfer circuit is without recharged capacitance etc.
Accessory power supply improves reliable breaking.
Although embodiment of the present invention is described in conjunction with attached drawing above, the invention is not limited to above-mentioned
Specific embodiments and applications field, above-mentioned specific embodiment are only schematical, directiveness, rather than restricted
's.Those skilled in the art are under the enlightenment of this specification and in the range for not departing from the claims in the present invention and being protected
In the case where, a variety of forms can also be made, these belong to the column of protection of the invention.
Claims (10)
1. it is a kind of based on mechanical switch arc voltage transfer dc circuit breaker, the dc circuit breaker include main current loop,
Transfer current branch and energy consuming circuitry, and main current loop, transfer current branch and energy consuming circuitry are in parallel, it is characterised in that：
The main current loop is composed in series by being isolated with high speed machine disconnecting switch S1 and transfer with high speed machine switch S2；
The transfer current branch one or more solid-state switch is composed in series, and the solid-state switch is by the first power semiconductor device
Part (A1), the second power semiconductor (A2), third power semiconductor (A3), the 4th power semiconductor (A4),
5th power semiconductor (A5) and buffer circuit (A6) composition, wherein：
First power semiconductor (A1) is connected with the second power semiconductor (A2), the third power semiconductor
Device (A3) is connected with the 4th power semiconductor (A4)；First power semiconductor (A1) and second power
There is first end point between semiconductor devices (A2)；The third power semiconductor (A3) and the 4th power semiconductor
There is the second endpoint between device (A4)；First power semiconductor (A1) and the third power semiconductor
(A3) there is third endpoint between；Second power semiconductor (A2) and the 4th power semiconductor (A4) it
Between have the 4th endpoint；The power semiconductor (A5) is connected between the first end point and second endpoint, delays
Circuit (A6) is rushed to be connected between the third endpoint and the 4th endpoint,
Energy consuming circuitry is made of in series and parallel one or more MOV, and energy consuming circuitry is connected to the third endpoint and the 4th end
Between point.
2. the dc circuit breaker according to claim 1 based on the transfer of mechanical switch arc voltage, it is characterised in that：It is preferred that
, isolation high speed machine disconnecting switch S1 and/or transfer high speed machine switch S2 includes one or more high speed
Mechanical switch is series-parallel, and the isolation high speed machine switch S1 is to have arc disjunction or thick-less vane, and high speed machine is used in the transfer
The arc-chutes medium of tool switch S2 is air, SF6, N2 or H2.
3. the dc circuit breaker according to claim 1 based on the transfer of mechanical switch arc voltage, it is characterised in that：It is described
Isolation is that the high speed machine based on electromagnetic repulsion force is opened with high speed machine disconnecting switch S1 and/or transfer with high speed machine switch S2
It closes, the mechanical switch based on high-speed motor driving or the high speed machine switch based on explosion driving, isolation are switched with high speed machine
The arc-chutes medium of S1 is SF6 or vacuum.
4. the dc circuit breaker according to claim 1 based on the transfer of mechanical switch arc voltage, it is characterised in that：It is described
First power semiconductor (A1), the second power semiconductor (A2), third power semiconductor (A3) or the 4th function
Rate semiconductor devices (A4) is uncontrollable or one-way conduction power semiconductor with half control function or combinations thereof, described the
Five power semiconductors (A5) are the all-controlling power electronics device with switch off current ability.
5. the dc circuit breaker according to claim 1 based on the transfer of mechanical switch arc voltage, it is characterised in that：Buffering
Circuit (A6) is connected between the first end point and second endpoint, and energy consuming circuitry is connected to the first end point and described
Between second endpoint.
6. the dc circuit breaker according to claim 1 based on the transfer of mechanical switch arc voltage, it is characterised in that：It is described
Buffer circuit is combined by the group of one or more of capacitor (C), resistance (R) or power semiconductor (D), the power
Semiconductor devices (D) is not control or the one-way conduction power semiconductor of half control.
7. the dc circuit breaker according to claim 1 based on the transfer of mechanical switch arc voltage, it is characterised in that：It is described
Buffer circuit includes capacitor (C), resistance (R) and power semiconductor (D), and the capacitor (C) is connected with resistance (R), described
Power semiconductor (D) is in parallel with resistance (R).
8. the dc circuit breaker according to claim 1 based on the transfer of mechanical switch arc voltage, it is characterised in that：It is described
Buffer circuit includes capacitor (C) and resistance (R), and the capacitor (C) is connected with resistance (R).
9. the dc circuit breaker according to claim 1 based on the transfer of mechanical switch arc voltage, it is characterised in that：Normally
Under working condition, electric current is flowed through from the main current circuit, the first power semiconductor (A1) in solid-state switching circuits,
Two power semiconductors (A2), third power semiconductor (A3), the 4th power semiconductor (A4), the 5th power half
Conductor device (A5) is in off state, and the transfer current branch does not have electric current to pass through；
When system is cut-off, the high speed machine switch in the main current circuit carries out separating brake movement, due to
The high speed machine switch is there are mechanical delay, and when separating brake movement is made, the high speed machine switch contact is still in closure
State；Power semiconductor in the transfer current branch is determined by the current amplitude and change rate that measure the main current circuit
Whether device acts and corresponding action sequence.
10. a kind of use of the described in any item dc circuit breakers based on the transfer of mechanical switch arc voltage of claim 1-9
Method comprising following steps：
In first step (S1), when system operates normally, electric current is all flowed through from main current circuit, and short circuit event occurs for system
Barrier, main current circuit electric current are begun to ramp up, and when being more than system short-circuit threshold value, transfer high speed machine switch S2 first starts to move
Make or isolation is moved at the same time with high speed machine switch S1 and transfer high speed machine switch S2；
In second step (S2), after transfer starting the arc between high speed machine switch S2 contact, in control conducting solid-state switching circuits
Power semiconductor (A5) open, transfer current branch conducting is opened using main current circuit transfer with high speed machine
The arc voltage for closing S2 passes through the electric current of main circuit to transfer current branch fast transfer；
In third step (S3), when main circuit current is fully transferred to transfer current branch, control isolation high speed machine every
It leaves and closes S1 separating brake, separating brake, main circuit are electric simultaneously alternatively, isolation is with high speed machine switch S1 and transfer high speed machine switch S2
Arc extinction and mechanical breaker is formed when stream is fully transferred to transfer current branch, between isolation high speed machine switch S1 contact；
In four steps (S4), when dielectric insulation intensity is resistant to cut-off electricity enough between the contact of high speed machine disconnecting switch S1
Pressure controls power semiconductor (A5) shutdown in solid-state switching circuits, and electric current is shifted to buffer circuit (A6), works as buffer circuit
Voltage is more than the on state threshold voltage of energy consuming circuitry MOV, energy consuming circuitry conducting；Electric current starts to shift to energy consuming circuitry；
In the 5th step (S5), electric current is fully transferred to energy consuming circuitry, and the voltage at breaker both ends reaches peak at this time, is
Breaker both ends overvoltage peak value in interrupting process；Hereafter, the electric current in energy consuming circuitry will be begun to decline, the electricity at breaker both ends
Pressure also starts slowly to decline, when system power is less than the minimum conducting electric current of energy consuming circuitry；Energy consuming circuitry is closed, energy consuming circuitry
Both end voltage declines rapidly, and the electric current in energy consuming circuitry is zero, and breaker cut-offs completion, and the voltage at breaker both ends is reduced to system
Voltage.
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| CN201810819005.5A CN108879620B (en) | 2018-07-25 | 2018-07-25 | Direct current breaker based on mechanical switch arc voltage transfer and use method thereof |
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| CN201810819005.5A CN108879620B (en) | 2018-07-25 | 2018-07-25 | Direct current breaker based on mechanical switch arc voltage transfer and use method thereof |
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| CN112421589A (en) * | 2020-12-01 | 2021-02-26 | 平高集团有限公司 | Hybrid direct current breaker with graded turn-off |
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