CN106300237A - A kind of magnetic field impulse transfer type is without arc dc circuit breaker - Google Patents
A kind of magnetic field impulse transfer type is without arc dc circuit breaker Download PDFInfo
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- CN106300237A CN106300237A CN201610854493.4A CN201610854493A CN106300237A CN 106300237 A CN106300237 A CN 106300237A CN 201610854493 A CN201610854493 A CN 201610854493A CN 106300237 A CN106300237 A CN 106300237A
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- transfer
- chopper
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
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- Emergency Protection Circuit Devices (AREA)
Abstract
The disclosure discloses a kind of magnetic field impulse transfer type without arc dc circuit breaker, including main current circuit, transfer current circuit and overvoltage limiting circuit；Wherein, main current circuit, transfer current circuit and overvoltage limiting circuit are in parallel；Main current circuit includes the conducting control that can block main current circuit reverse current, it is achieved electric current cut-offs without arc, and this conducting control is made up of the power semiconductor reverse parallel connection with one-way conduction function；Transfer current circuit is a kind of bridge circuit, including the conducting control of the resistance to voltage levels improving circuit；Simultaneously, described transfer current circuit only unidirectional have with one group and can realize two-way disjunction to electric current by turn-off capacity power semiconductor, relative to existing design, minimum save 50% unidirectional have can turn-off capacity power semiconductor, effectively reduce chopper volume and manufacturing cost.
Description
Technical field
The disclosure belongs to mesohigh field of circuit breakers, is specifically related to a kind of magnetic field impulse transfer type without arc dc circuit breaker.
Background technology
The hybrid circuit-breaker being made up of with power semiconductor high speed machine switch has that discharge capacity is big, it is fast to turn off
The advantages such as degree is fast, have become as hicap and cut-off the study hotspot in field.Use the power semiconductor with full control function
The hybrid dc circuit breaker scheme of device breaking current has breaking speed faster compared to other scheme, more conducively disjunction volume
The advantage determining electric current.But when using full-control type power semiconductor disjunction bidirectional current, its electric current commutating circuit generally needs
Two-way full-control type power semiconductor cut-off current, control complexity is wanted with relatively costly, to constrain its promotion and application.
Additionally, typical zero current type structure dc circuit breaker utilizes and is connected on the recharged capacitance in transfer current circuit
The reverse pulse current that electric discharge produces resists the electric current in high speed machine switch, and then creates one in high speed machine switchs
Current zero-crossing point.This simple in construction, reliable, but after cut-offfing end, recharged capacitance voltage is equal to system voltage, to electric capacity
The charhing unit of charging must be able to bear higher system voltage, adds the manufacturing cost of charhing unit, difficulty and volume, becomes
For limiting one of reason of this kind of dc circuit breaker popularization.
Summary of the invention
The deficiency existed for above-mentioned prior art or defect, the purpose of the disclosure is to provide a kind of magnetic field impulse transfer type
Dc circuit breaker without arc, described chopper includes main current circuit, transfer current circuit, overvoltage limiting circuit；
Described main current circuit is for by the electric current under normal operating conditions；
Described transfer current circuit is for when there is short-circuit current, it is achieved short-circuit current is from main current circuit
Transfer；
Described overvoltage limiting circuit is for when short circuit current reaches threshold value, the disconnection of described transfer current circuit, dissipating
The energy of short-circuit current.
Specifically, described transfer current circuit includes circuit 1, circuit 2, circuit 3, circuit 4, circuit 5, circuit 6, when described
When short trouble occurs in chopper place Circuits System, or form the first transfer current branch road, or form the second transfer electricity
Stream branch road；
Described first transfer current branch road includes circuit 3, circuit 6, circuit 5, circuit 2；
Described second transfer current branch road includes circuit 4, circuit 6, circuit 5, circuit 1；
Wherein:
Described circuit 3, circuit 2, circuit 6 are turned on or off for control the second transfer current branch road, described circuit 4,
Circuit 1, circuit 6 control being turned on or off of the second transfer current branch road, and described circuit 6, reach threshold value at short circuit current
Time disconnect；
Described circuit 5, for discharging when being short-circuited fault, to accelerate main current circuit to the first transfer current branch road
Or the second transfer current branch road transfer.
Preferably, described circuit 1 is connected with circuit 2, and described circuit 3 is connected with circuit 4, and described circuit 5 is gone here and there with circuit 6
Connection；
Circuit 1 after series connection and circuit 2 with connect after circuit 3 in parallel with circuit 4；
Circuit 1 after series connection is in parallel with main current circuit with circuit 2；
Circuit 5 after series connection is connected the junction between circuit 1 and circuit 2 with circuit 6 one end, and the other end connects circuit 3
And the junction between circuit 4.
Preferably, described main current circuit includes the first conducting control and the second conducting control of series connection；
The machinery that described first conducting control includes high speed machine based on electromagnetic repulsion force switch, drives based on high-speed electric expreess locomotive
Switch or high speed machine based on explosion driving switch；
Described second conducting control includes the power semiconductor reverse parallel connection composition with one-way conduction function.
Preferably, described circuit 1 includes the 3rd conducting control, and described circuit 2 includes the 4th conducting control, described circuit 3
Including the 5th conducting control, described circuit 4 includes the 6th conducting control；
Described 3rd conducting control, the 4th conducting control, the 5th conducting control, the 6th conducting control all include following arbitrary
Or its combination in any:
Triggered vacuum gap, gas triggered gap, high speed machine based on electromagnetic repulsion force switch, drive based on high-speed electric expreess locomotive
Mechanical switch, high speed machine based on explosion driving switch.
Preferably, described circuit 5 includes former limit inducer, secondary inductance device, energy-storage travelling wave tube, and the 8th turns on control piece, its
In:
Described former limit inductance and secondary inductance composition transformer；
Described energy-storage travelling wave tube and the 8th conducting control piece are in parallel with secondary inductance device after connecting.
Preferably, described energy-storage travelling wave tube includes recharged capacitance, superconduction inductance；
Described 8th conducting control piece includes following arbitrary or its combination in any: power semiconductor, triggered gap.
Preferably, described circuit 6 includes that the 7th conducting control, described 7th conducting control include a full-control type power half
The combination of conductor device or arbitrarily full-control type power semiconductor.
Preferably, when described chopper in normal operation, electric current flows through from described main current circuit, described transfer
Current circuit and overvoltage limiting circuit do not have electric current to flow through；Described overvoltage limiting circuit or in parallel with main current circuit,
Or with connect after circuit 5, electric current 6 in parallel.
Preferably, described overvoltage limiting circuit includes metal-oxide varistor (MOV), described metal-oxide pressure
Quick resistance includes varistor or the spark gap of zinc oxide valve plate composition.
Chopper described in the disclosure turns on according to certain sequential by controlling each conducting control of transfer current circuit, can
Open without arc realizing the high speed machine switch contact of main current circuit.In main current circuit, by having one-way conduction
The power semiconductor of function carries out reverse parallel connection and constitutes the second conducting control, it is to avoid the appearance of reverse current, between contact
Dielectric recovery property is good.
Transfer current circuit uses bridge architecture, only unidirectional have with one group and can just may be used by turn-off capacity power semiconductor
To realize two-way disjunction to electric current, relative to existing design, minimum save 50% unidirectional have can turn-off capacity power
Semiconductor device, effectively reduces breaker control complexity and manufacturing cost.By mutual inductance of connecting in transfer current circuit
Device, controls the electric capacity electric discharge generation pulse current of transformer and the former avris of straight-flow system isolation, be connected with straight-flow system
Transformer secondary side induce pulse current to shift high speed machine switch in electric current, produce current zero-crossing point.Can realize
Electric capacity charhing unit and the isolation of straight-flow system, be substantially reduced electric pressure and the volume of charhing unit, and it is reliable that raising is cut-off
Property.
Accompanying drawing explanation
Fig. 1 is chopper body construction schematic diagram in one embodiment of the disclosure；
Fig. 2 is overvoltage limiting circuit VA characteristic curve figure in one embodiment of the disclosure；
Fig. 3 is that in one embodiment of the disclosure, dc circuit breaker puts into procedure structure schematic diagram；
Fig. 4 is a kind of structural representation during chopper one-way only operation in one embodiment of the disclosure；
Fig. 5 is another kind of structural representation during chopper one-way only operation in one embodiment of the disclosure；
Fig. 6 is that the first of one embodiment of the disclosure is embodied as instance graph；
Fig. 7 is that the second of one embodiment of the disclosure is embodied as instance graph；
Fig. 8 is that the third of one embodiment of the disclosure is embodied as instance graph；
Transfer current circuital current mark schematic diagram when Fig. 9 is breaking current in one embodiment of the disclosure；
Figure 10 is the breaking current corresponding to Fig. 9 of the dc circuit breaker of the two-way disjunction according to one embodiment of the disclosure
Time each circuit in curent change curve chart；
Sense of current when system is properly functioning when Figure 11 (a) is breaking current in one embodiment of the disclosure；
When Figure 11 (b) is breaking current in one embodiment of the disclosure, electric current is to the 5th conducting control A3, the 7th conducting control
Current direction schematic diagram when the transfer branch road of part A6, former limit inducer L0, the 4th conducting control A2 composition shifts；
When Figure 11 (c) is breaking current in one embodiment of the disclosure, electric current is completely transferred to the 5th conducting control A3, the
Current direction schematic diagram when the transfer branch road of seven conducting control A6, former limit inducer L0, the 4th conducting control A2 compositions shifts；
When Figure 11 (d) is breaking current in one embodiment of the disclosure, electric current starts to shift to overvoltage limiting circuit；
When Figure 11 (e) is breaking current in one embodiment of the disclosure, electric current shifts to overvoltage limiting circuit completely；
Sense of current when Figure 12 (a) is that in one embodiment of the disclosure, system is properly functioning；
Figure 12 (b) is that in one embodiment of the disclosure, electric current turns on to the 6th conducting control A4, former limit inducer L0, the 7th
Control A6, the current direction schematic diagram when transfer branch road of the 3rd conducting control A1 composition shifts；
Figure 12 (c) is that in one embodiment of the disclosure, electric current is completely transferred to the 6th conducting control A4, former limit inducer L0,
7th conducting control A6, the current direction schematic diagram when transfer branch road of the 3rd conducting control A1 composition shifts；
When Figure 12 (d) is breaking current in one embodiment of the disclosure, electric current starts to shift to overvoltage limiting circuit；
When Figure 12 (e) is breaking current in one embodiment of the disclosure, electric current shifts to overvoltage limiting circuit completely.
Detailed description of the invention
In a basic embodiment, it is provided that a kind of magnetic field impulse transfer type includes without arc dc circuit breaker, described chopper
Main current circuit, transfer current circuit, overvoltage limiting circuit；Described main current circuit is for by under normal operating conditions
Electric current；Described transfer current circuit is for when there is short-circuit current, it is achieved short-circuit current is from main current circuit
Transfer；Described overvoltage limiting circuit is for when short circuit current reaches threshold value, the disconnection of described transfer current circuit, and dissipate short circuit
The energy of fault current.
Preferably, when described chopper in normal operation, electric current flows through from described main current circuit, described transfer
Current circuit and overvoltage limiting circuit do not have electric current to flow through；Described overvoltage limiting circuit or in parallel with main current circuit,
Or with connect after circuit 5, electric current 6 in parallel.
Preferably, the leakage current of described overvoltage limiting circuit is less than 1 μ A, the conducting voltage of described overvoltage limiting circuit
Threshold value is 1.5 times of the system voltage residing for described chopper.
Preferably, described overvoltage limiting circuit includes metal-oxide varistor (MOV), described metal-oxide pressure
Quick resistance includes varistor or the spark gap of zinc oxide valve plate composition.
In one embodiment, the structure of transfer current circuit is particularly as follows: described transfer current circuit includes circuit 1, electricity
Road 2, circuit 3, circuit 4, circuit 5, circuit 6, when short trouble occurs in described chopper place Circuits System, or form the
One transfer current branch road, or form the second transfer current branch road；Described first transfer current branch road include circuit 3, circuit 6,
Circuit 5, circuit 2；Described second transfer current branch road includes circuit 4, circuit 6, circuit 5, circuit 1.
Wherein, described circuit 3 and circuit 2 control being turned on or off of the first transfer current branch road；Described circuit 4 and circuit
1 controls being turned on or off of the second transfer current branch road；Described circuit 6, for turning on when being short-circuited fault, and in short circuit
Electric current reaches to disconnect during threshold value；Described circuit 5, for discharging when being short-circuited fault, to accelerate main current circuit to first
Transfer current branch road or the transfer of the second transfer current branch road.
In one embodiment, a kind of concrete connected mode of above-mentioned carry circuit is disclosed: described carry circuit is one
Planting bridge circuit, wherein said circuit 1 is connected with circuit 2, and described circuit 3 is connected with circuit 4, and described circuit 5 is gone here and there with circuit 6
Connection；Circuit 1 after series connection and circuit 2 with connect after circuit 3 in parallel with circuit 4；Circuit 1 after series connection and circuit 2 and main electricity
Current circuit is in parallel；Circuit 5 after series connection is connected the junction between circuit 1 and circuit 2 with circuit 6 one end, and the other end connects electricity
Junction between road 3 and circuit 4.Turn on according to certain sequential by controlling each circuit, it is possible to achieve chopper disconnects without arc.
In one embodiment, described main current circuit includes the first conducting control and the second conducting control of series connection；Institute
State the first conducting control include high speed machine based on electromagnetic repulsion force switch, based on high-speed electric expreess locomotive drive mechanical switch or based on
The high speed machine switch of explosion driving；Described second conducting control includes that the power semiconductor with one-way conduction function is anti-
To composing in parallel.
Be there is the second conducting control of the power semiconductor reverse parallel connection composition of one-way conduction function by employing, can
To avoid the appearance of reverse current, and using high speed machine to switch, between contact, dielectric recovery property is good, improves chopper and cut-offs
Reliability.
In one embodiment, described circuit 1 includes the 3rd conducting control, and described circuit 2 includes the 4th conducting control, institute
Stating circuit 3 and include the 5th conducting control, described circuit 4 includes the 6th conducting control；Described 3rd conducting control, the 4th conducting control
Part, the 5th conducting control, the 6th conducting control all include following arbitrary or its combination in any: triggered vacuum gap, gas trigger
Gap, high speed machine based on electromagnetic repulsion force switch, mechanical switch based on high-speed electric expreess locomotive driving, high speed based on explosion driving
Mechanical switch.
Employing high speed machine switchs, and between contact, dielectric recovery property is good, improves the reliability that chopper cut-offs.
In one embodiment, described circuit 5 includes former limit inducer, secondary inductance device, energy-storage travelling wave tube, the 8th conducting control
Product, wherein:
Described former limit inductance and secondary inductance composition transformer；Described energy-storage travelling wave tube and the 8th conducting control piece series connection after with
Secondary inductance device is in parallel.The former limit inducer L0 of described composition transformer and secondary inductance device L1 is air core inductor or contains magnetic core
Inducer
By serial mutual inductor in transfer current circuit, control the electric capacity of transformer and the former avris of straight-flow system isolation
Electric discharge produces pulse current, induces pulse current in the transformer secondary side being connected with straight-flow system and opens to shift high speed machine
The electric current in the Central Shanxi Plain, produces current zero-crossing point.The isolation of electric capacity charhing unit and straight-flow system can be realized, be substantially reduced charging single
The electric pressure of unit and volume, improve the reliability cut-off.
Preferably, described energy-storage travelling wave tube includes recharged capacitance, superconduction inductance；Described 8th conducting control piece includes following
Arbitrary or its combination in any: power semiconductor, triggered gap.
Preferably, in circuit 5, the number of transformer can be two or more combination.
Preferably, in circuit 5, the number of energy-storage travelling wave tube can be two or more combination.
Preferably, in circuit 5, the number of the 8th conducting control piece can be two or more combination.
In one embodiment, described circuit 6 includes that the 7th conducting control, described 7th conducting control include a full control
The combination of type power semiconductor or arbitrarily full-control type power semiconductor.
One group is used unidirectional to have and just can realize the two-way disjunction to electric current, phase by turn-off capacity power semiconductor
For existing design, minimum save 50% unidirectional have can turn-off capacity power semiconductor, effectively reduce chopper
Control complexity and manufacturing cost.
The detailed description of the invention of the disclosure is described below in conjunction with accompanying drawing.
In one embodiment, disclose a kind of magnetic field impulse transfer type without arc dc circuit breaker, its structure as it is shown in figure 1,
Described chopper includes main current circuit, transfer current circuit, overvoltage limiting circuit.Wherein: described main current circuit with turn
Shifting current circuit is in parallel, and described transfer current circuit is in parallel with overvoltage limiting circuit.Described main current circuit is for by just
The often electric current under duty；Described transfer current circuit is for when there is short-circuit current, it is achieved short-circuit current
From the transfer of main current circuit；Described overvoltage limiting circuit is for reaching threshold value, described transfer current circuit when short circuit current
During disconnection, the energy of dissipation short-circuit current.
In Fig. 1, transfer current circuit includes circuit 1, circuit 2, circuit 3, circuit 4, circuit 5, circuit 6, when described open circuit
When short trouble occurs in device place Circuits System, or form the first transfer current branch road, or formation the second transfer current props up
Road；Described first transfer current branch road includes circuit 3, circuit 6, circuit 5, circuit 2；Described second transfer current branch road includes electricity
Road 4, circuit 6, circuit 5, circuit 1.
The annexation of each circuit is: described circuit 1 is connected with circuit 2, and described circuit 3 is connected with circuit 4, described circuit
5 connect with circuit 6；Circuit 1 after series connection and circuit 2 with connect after circuit 3 in parallel with circuit 4；Circuit 1 after series connection and electricity
Road 2 is in parallel with main current circuit；Circuit 5 after series connection is connected the junction between circuit 1 and circuit 2 with circuit 6 one end, another
End connects the junction between circuit 3 and circuit 4.
Wherein: main current circuit includes the first conducting control FCB of series connection, the second conducting control A0；Circuit 1 includes the 3rd
Conducting control A1, circuit 2 includes the 4th conducting control A2, and circuit 3 includes the 5th conducting control A3, and circuit 4 includes the 6th conducting
Control A4, circuit 6 includes the 7th conducting control A6, and circuit 5 includes former limit inducer L0, secondary inductance device L1, energy-storage travelling wave tube B1,
8th conducting control B2, and described energy-storage travelling wave tube B1, in parallel with secondary inductance device after the 8th conducting control piece B2 series connection.
Turn on according to certain sequential by controlling each circuit in transfer current circuit, it is possible to achieve high speed machine switch contact
Open without arc, and avoid the appearance of reverse current.When there is short trouble in described chopper place Circuits System, or
Form the first transfer current branch road, or form the second transfer current branch road；Described first transfer current branch road include circuit 3,
Circuit 6, circuit 5, circuit 2；Described second transfer current branch road includes circuit 4, circuit 6, circuit 5, circuit 1.
Further, the first conducting control FCB includes high speed machine based on electromagnetic repulsion force switch, drives based on high-speed electric expreess locomotive
Dynamic mechanical switch or high speed machine based on explosion driving switch.
Second conducting control A0 includes the power semiconductor reverse parallel connection composition with one-way conduction function.Described merit
Rate semiconductor device includes but not limited to one or more combinations in IGCT, IGBT, IGCT, GTO.
3rd conducting control A1, the 4th conducting control A2, the 5th conducting control A3, the 6th conducting control A4 all include following
Arbitrary or its combination in any:
Triggered vacuum gap, gas triggered gap, high speed machine based on electromagnetic repulsion force switch, drive based on high-speed electric expreess locomotive
Mechanical switch or high speed machine based on explosion driving switch.
7th conducting control A6 includes one or two or the combination of multiple full-control type power semiconductor, described full-control type
Power semiconductor includes but not limited to one or any number of combination in IGBT, IGCT, GTO.
Energy-storage travelling wave tube B1 includes recharged capacitance, superconduction inductance.
8th conducting control piece B2 includes following arbitrary or its combination in any: power semiconductor, triggered gap.
Overvoltage limiting circuit can be metal-oxide varistor (MOV), described metal-oxide varistor bag
Include varistor or the spark gap of zinc oxide valve plate composition.The leakage current of described overvoltage limiting circuit is less than 1 μ A, described the most electric
1.5 times that conducting voltage threshold value is the system voltage residing for described chopper of pressure limiting circuit, Fig. 2 illustrates overvoltage and limits
The VA characteristic curve of circuit.
The chopper that Fig. 3 illustrates puts into process, and wherein S1, S2 are the incoming end of chopper access system, and chopper makes
Used time, the two ends of main current circuit are connected with the first incoming end S1, the second incoming end S2, described first incoming end S1 and second
Incoming end S2 flows into or out electric current.Described system can be any required for use the system of chopper, be not limited to these public affairs
Open described scope.By electric current from the first incoming end S1 to as a example by the second incoming end S2, illustrate that the direct current that the disclosure comprises breaks
Road device puts into process, is specifically divided into following components:
S101, dc circuit breaker being connected into system access point end S1 and S2, during access, the first conducting control FCB is in disconnected
Open state, the 3rd conducting control A1 of circuit 1, the 4th conducting control A2 of circuit 2, the 5th conducting control A3, circuit of circuit 3
The 6th conducting control A4 of 4 is off.Now, all power semiconductors of dc circuit breaker are off,
System voltage is at dc circuit breaker two ends.
S102, control the first conducting control FCB close a floodgate, owing to now the second conducting control A0 is not turned on, and making process
Not havinging electric arc, system voltage turns on control A0 two ends second.
After S103, main current circuit high speed machine switch combined floodgate completes, control the second conducting control A0 conducting.So far, directly
Stream chopper puts into process and completes, and starts properly functioning.
Two kinds of transfer current branch currents that Fig. 4 with Fig. 5 illustrates in the case of the different flow direction of main current circuit flow to.Its
In, Fig. 4 gives circuit breaker current electric current transfer branch road schematic diagram from left side to the right, and Fig. 5 provides electric current from right side to the left
The electric current transfer branch road schematic diagram of side.As seen from the figure, described chopper can accept the system power of different directions, is
Two-way chopper.
Fig. 6 illustrates a kind of structure of disclosure chopper.Wherein, overvoltage limiting circuit is made up of spark gap.First
Conducting control FCB is mechanical switch, and the second conducting control A0 is made up of two IGCT reverse parallel connections.3rd conducting control A1,
4th conducting control A2, the 5th conducting control A3, the 6th conducting control A4 are triggered vacuum gap.7th conducting control A6 is many
Individual IGBT connection in series-parallel forms.Energy-storage travelling wave tube B1 is pre-charge capacitor, and the 8th conducting control B2 is IGCT.
Fig. 7 illustrates the another kind of structure of disclosure chopper.Wherein, overvoltage limiting circuit is made up of spark gap.The
One conducting control FCB is mechanical switch, and the second conducting control A0 is made up of two groups of IGCT reverse parallel connections.3rd conducting control
A1, the 4th conducting control A2, the 5th conducting control A3, the 6th conducting control A4 are air triggered gap.A6 is multiple IGCT string
Compose in parallel.Energy-storage travelling wave tube B1 is superconduction inductance, and the 8th conducting control B2 is IGCT.
Fig. 8 illustrates the third structure of disclosure chopper.In this kind of structure, overvoltage limiting circuit is directly with electric
Road 5 and circuit 6 are in parallel.Wherein, the first conducting control FCB is mechanical switch, and the second conducting control A0 is reverse by two groups of IGCTs
Compose in parallel.3rd conducting control A1, the 4th conducting control A2, the 5th conducting control A3, the 6th conducting control A4 are that air touches
Send out gap.A6 is multiple IGCT connection in series-parallel composition.Energy-storage travelling wave tube B1 is superconduction inductance, and the 8th conducting control B2 is IGCT.
When described chopper in normal operation, electric current flows through from described main current circuit, second conducting control A0
In the conduction state, described transfer current circuit and overvoltage limiting circuit do not have electric current to flow through.But when being short-circuited fault, need
When wanting disjunction short circuit current:
If the direction of short circuit current is to flow at the first incoming end S1, when flowing out at the second incoming end S2, control circuit 3
5th conducting control A3, circuit 2 the 4th conducting control A2 conducting, circuit 1 the 3rd turns on control A1, and circuit 4 the 6th turns on control
A4 is off, by circuit 6 the 7th conducting control A6 press conducting direction access circuit, electric current by main current circuit to electricity
The 3-6-5-2 branch road transfer of road 3, circuit 6, circuit 5 and circuit 2 composition；
If the direction of short circuit current is to flow at the second incoming end S2, when flowing out at the first incoming end S1, control circuit
1, the 3rd conducting control A1, the 6th conducting control A4 conducting in circuit 4, circuit 2, device the 4th conducting control A2 in circuit 3, the
7th conducting control A6 in circuit 6, still in off-state, is pressed conducting direction and accesses circuit by five conducting control A3, and electric current is by leading
The 4-6-5-1 branch road transfer that current circuit forms to circuit 4, circuit 6, circuit 5 and circuit 1.
Transfer current circuit each branch current mark when Fig. 9 gives breaking current, wherein i for flow through incoming end S1 or
The electric current of incoming end S2, i0 is the electric current flowing through main current circuit, and i1 is the electric current flowing through circuit 1, and i2 is the electricity flowing through circuit 2
Stream, i3 is the electric current flowing through circuit 3, and i4 is the electric current flowing through circuit 4, and i5 is for flowing through energy-storage travelling wave tube B1 in circuit 5, the 8th conducting
Control B2 and the electric current of former limit inducer L0, i6 is to flow through secondary inductance device L1 and the electric current of circuit 6 in circuit 5, and i7 is for flowing through
The electric current of overvoltage limiting circuit.Figure 10 gives when breaking current the curent change of each circuit on one transfer current branch road
Curve chart, electric current is designated in Fig. 6 the mark of correspondence.
Figure 11 (a)-11 (e) gives the flow direction of electric current, transfer current during breaking current
Each branch current direction in circuit.Below in conjunction with the curent change moment in Figure 10, tell about each circuit control action.
S201, system are properly functioning, and electric current all flows through from main current circuit, shown in current direction such as Figure 11 (a), wherein
System nominal current is i.Energy-storage travelling wave tube B1 is pre-charged.3rd conducting control A1, the 4th conducting control A2, the 5th conducting control
A3, the 6th conducting control A4, the 7th conducting control A6, the 8th conducting control B2 are in off state.
In S202, t0 moment, system is short-circuited fault, and main current circuit electric current begins to ramp up, between t0 and t1, when exceeding
During system short-circuit threshold value, control the 8th conducting control B2, the 5th conducting control A3, the 4th conducting control A2 and the 7th conducting control
A6 turns on.
In S203, t1 moment, energy-storage travelling wave tube B1, the 8th conducting control B2 and former limit inducer L0 form discharge loop, simultaneously
Electric current is induced in secondary inductance device L1.Main current loop electric current gradually shifts to transfer current branch road 3-6-5-2, principal current
Circuital current reduces.Shown in current direction such as Figure 11 (b).
In S204, t2 moment, main current circuit electric current is transferred to transfer current branch road 3-6-5-2 completely, current direction such as figure
Shown in 11 (c), now control main current circuit mechanical switch and open without arc, form fracture.
S205, between t2 to t3, branch road 3-6-5-2 bears whole short circuit current.Treat that short circuit current rises to threshold value, at t3
In the moment, control the 7th conducting control A6 and turn off the electric current in branch road 3-6-5-2.
Between S206, t3 to t4, can be at circuit 3, circuit 6, circuit 5 and 2 liang of circuit during the 7th conducting control A6 cut-off current
End produces overvoltage, i.e. creates overvoltage at chopper two ends, and overvoltage has reached the conducting threshold of overvoltage limiting circuit
Value, overvoltage limiting circuit turns on.Shown in current direction such as Figure 11 (d), electric current starts to shift to overvoltage limiting circuit.Due to
The voltage clamp effect of overvoltage limiting circuit, chopper both end voltage ascensional range is the least.
In S207, t4 moment, the electric current in branch road 3-6-5-2 is fully transferred to overvoltage limiting circuit, the 5th conducting control
A3, the 4th conducting control A2 disconnect, and shown in current direction such as Figure 11 (e), now the voltage at chopper two ends reaches peak, for
Chopper two ends overvoltage peak value in interrupting process.Hereafter, the electric current in overvoltage circuit will begin to decline, chopper two ends
Voltage also begins to slowly decline, and when system power is less than the minimum conducting electric current 1mA of overvoltage limiting circuit, overvoltage limits
Circuit is closed, and overvoltage limiting circuit both end voltage declines rapidly.
In S208, t5 moment, the electric current in overvoltage limiting circuit is 0, and chopper has cut-off, the voltage at chopper two ends
Reduce to system voltage.
Figure 12 (a)-12 (e) gives the flow direction of electric current, transfer current during breaking current
Each branch current direction in circuit.Below in conjunction with the curent change moment in Figure 10, tell about each circuit control action.
S301, system are properly functioning, and electric current all flows through from main current circuit, shown in current direction such as Figure 12 (a), wherein
System nominal current is i.Energy-storage travelling wave tube B1 is pre-charged.3rd conducting control A1, the 4th conducting control A2, the 5th conducting control
A3, the 6th conducting control A4, the 7th conducting control A6, the 8th conducting control B2 are in off state.
In S302, t0 moment, system is short-circuited fault, and main current circuit electric current begins to ramp up, between t0 and t1, when exceeding
During system short-circuit threshold value, control the 8th conducting control B2, control the 3rd conducting control A1, the 6th conducting control A4 and the 7th simultaneously
Conducting control A6 conducting.
In S303, t1 moment, B1, B2 and L0 form discharge loop, induce electric current simultaneously in secondary inductance device L1.Main electricity
Stream loop current gradually shifts to transfer current branch road 4-6-5-1, and main current circuit electric current reduces.Current direction such as Figure 12 (b)
Shown in.
In S304, t2 moment, main current circuit electric current is transferred to current branch 4-6-5-1 completely, current direction such as Figure 12 (c)
Shown in, now control main current circuit mechanical switch and open without arc, form fracture.
S305, between t2 to t3, branch road 4-6-5-1 bears whole short circuit current.Treat that short circuit current rises to threshold value, at t3
In the moment, control the 7th conducting control A6 and turn off the electric current in branch road 4-6-5-1.
Between S306, t3 to t4, can be at circuit 1, circuit 6, circuit 5 and 4 liang of circuit during the 7th conducting control A6 cut-off current
End produces overvoltage, i.e. creates overvoltage at chopper two ends, and overvoltage has reached the conducting threshold of overvoltage limiting circuit
Value, overvoltage limiting circuit turns on.Shown in current direction such as Figure 12 (d), electric current starts to shift to overvoltage limiting circuit.Due to
The voltage clamp effect of overvoltage limiting circuit, chopper both end voltage ascensional range is the least.
In S307, t4 moment, the electric current in branch road 4-6-5-1 is fully transferred to overvoltage limiting circuit, the 3rd conducting control
A1, the 6th conducting control A4 disconnect, and shown in current direction such as Figure 12 (e), now the voltage at chopper two ends reaches peak, for
Chopper two ends overvoltage peak value in interrupting process.Hereafter, the electric current in overvoltage circuit will begin to decline, chopper two ends
Voltage also begins to slowly decline, and when system power is less than the minimum conducting electric current 1mA of overvoltage limiting circuit, overvoltage limits
Circuit is closed, and overvoltage limiting circuit both end voltage declines rapidly.
In S308, t5 moment, the electric current in overvoltage limiting circuit is 0, and chopper has cut-off, the voltage at chopper two ends
Reduce to system voltage.
To sum up, it relates to a kind of magnetic field impulse transfer type include main current circuit without arc dc circuit breaker, transfer electricity
Current circuit and overvoltage limiting circuit.Transfer current circuit is formed bridge architecture by vacuum, gas or speed-sensitive switch, it is only necessary to
Use one group of unidirectional full-control type power semiconductor just can complete disjunction bidirectional current.When chopper needs drop-out current,
Press by controlling main current circuit and the vacuum of transfer current circuit, gas or speed-sensitive switch and power semiconductor
Certain sequential action, it is possible to achieve high speed machine switch contact is opened without arc, and between contact, dielectric recovery property is good, in conjunction with overvoltage
Limiting circuit, can significantly improve the reliability cut-off.Transfer current circuit comprises a kind of transformer, uses this transfer current electricity
Road can complete quick breaking current, and realizes the isolation of electric capacity charged side and straight-flow system.Charhing unit can be substantially reduced
Electric pressure and volume, improve the reliability cut-off.
Above content is to combine the further description that the disclosure is made by concrete preferred implementation, it is impossible to assert
The detailed description of the invention of the disclosure is only limitted to this, for disclosure person of an ordinary skill in the technical field, is not taking off
On the premise of the disclosure is conceived, it is also possible to make some simple deduction or replace, all should be considered as belonging to the disclosure by institute
The claims submitted to determine protection domain.
Claims (10)
1. a magnetic field impulse transfer type is without arc dc circuit breaker, it is characterised in that:
Described chopper includes main current circuit, transfer current circuit, overvoltage limiting circuit；
Described main current circuit is for by the electric current under normal operating conditions；
Described transfer current circuit is for when there is short-circuit current, it is achieved short-circuit current turning from main current circuit
Move；
Described overvoltage limiting circuit is for when short circuit current reaches threshold value, the disconnection of described transfer current circuit, and dissipate short circuit
The energy of fault current.
Chopper the most according to claim 1, it is characterised in that:
Preferably, described transfer current circuit includes circuit 1, circuit 2, circuit 3, circuit 4, circuit 5, circuit 6, when described open circuit
When short trouble occurs in device place Circuits System, circuit 3, circuit 6, circuit 5, circuit 2 form the first transfer current branch road, or
Person is formed the second transfer current branch road by circuit 4, circuit 6, circuit 5, circuit 1；
Wherein:
Described circuit 3 and circuit 2 control being turned on or off of the first transfer current branch road；
Described circuit 4 and circuit 1 control being turned on or off of the second transfer current branch road；
Described circuit 6, for turning on when being short-circuited fault, and disconnects when short circuit current reaches threshold value；
Described circuit 5, for discharging when being short-circuited fault, with accelerate main current circuit to the first transfer current branch road or
Second transfer current branch road transfer.
Chopper the most according to claim 2, it is characterised in that:
Described circuit 1 is connected with circuit 2, and described circuit 3 is connected with circuit 4, and described circuit 5 is connected with circuit 6；
Circuit 1 after series connection and circuit 2 with connect after circuit 3 in parallel with circuit 4；
Circuit 1 after series connection is in parallel with main current circuit with circuit 2；
Circuit 5 after series connection is connected the junction between circuit 1 and circuit 2 with circuit 6 one end, and the other end connects circuit 3 and electricity
Junction between road 4.
4. according to the arbitrary described chopper of claim 1-3, it is characterised in that:
Described main current circuit includes the first conducting control and the second conducting control of series connection；
The mechanical switch that described first conducting control includes high speed machine based on electromagnetic repulsion force switch, drives based on high-speed electric expreess locomotive
Or high speed machine of based on explosion driving switch；
Described second conducting control includes the power semiconductor reverse parallel connection composition with one-way conduction function.
5. according to the arbitrary described chopper of claim 2-3, it is characterised in that:
Described circuit 1 includes the 3rd conducting control, and described circuit 2 includes the 4th conducting control, and described circuit 3 includes the 5th conducting
Control, described circuit 4 includes the 6th conducting control；
Described 3rd conducting control, the 4th conducting control, the 5th conducting control, the 6th conducting control all include following arbitrary or its
Combination in any:
Triggered vacuum gap, gas triggered gap, high speed machine based on electromagnetic repulsion force switch, the machine driven based on high-speed electric expreess locomotive
Tool switch, high speed machine based on explosion driving switch.
6. according to the arbitrary described chopper of claim 2-3, it is characterised in that:
Described circuit 5 includes former limit inducer, secondary inductance device, energy-storage travelling wave tube, and the 8th turns on control piece, wherein:
Described former limit inductance and secondary inductance composition transformer；
Described energy-storage travelling wave tube and the 8th conducting control piece are in parallel with secondary inductance device after connecting.
Chopper the most according to claim 6, it is characterised in that:
Described energy-storage travelling wave tube includes recharged capacitance, superconduction inductance；
Described 8th conducting control piece includes following arbitrary or its combination in any:
Power semiconductor, triggered gap.
8. according to the arbitrary described chopper of claim 2-3, it is characterised in that:
Described circuit 6 include the 7th conducting control, described 7th conducting control include a full-control type power semiconductor or
The combination of person's any full-control type power semiconductor.
9. according to the chopper described in Claims 2 or 3, it is characterised in that:
When described chopper in normal operation, electric current flows through from described main current circuit, described transfer current circuit and
Overvoltage limiting circuit does not has electric current to flow through；
Described overvoltage limiting circuit is in parallel with main current circuit, or with connect after circuit 5, electric current 6 in parallel.
10. according to the arbitrary described chopper of claim 1-3, it is characterised in that:
Described overvoltage limiting circuit includes that metal-oxide varistor (MOV), described metal-oxide varistor include
Varistor or the spark gap of zinc oxide valve plate composition.
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| CN201610854493.4A CN106300237A (en) | 2016-09-27 | 2016-09-27 | A kind of magnetic field impulse transfer type is without arc dc circuit breaker |
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| CN201610854493.4A CN106300237A (en) | 2016-09-27 | 2016-09-27 | A kind of magnetic field impulse transfer type is without arc dc circuit breaker |
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| CN106451338A (en) * | 2016-09-27 | 2017-02-22 | 西安交通大学 | Magnetic induction transferred DC circuit breaker |
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| CN109361202A (en) * | 2018-09-27 | 2019-02-19 | 许继集团有限公司 | A kind of current-injection type breaker |
| CN113574623A (en) * | 2019-03-29 | 2021-10-29 | 西门子股份公司 | Hybrid circuit breaker, hybrid circuit breaking system and circuit breaking method |
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