CN206559026U - The pouring-in electric current carry circuit of one kind isolation - Google Patents
The pouring-in electric current carry circuit of one kind isolation Download PDFInfo
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- CN206559026U CN206559026U CN201621083893.1U CN201621083893U CN206559026U CN 206559026 U CN206559026 U CN 206559026U CN 201621083893 U CN201621083893 U CN 201621083893U CN 206559026 U CN206559026 U CN 206559026U
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Abstract
The disclosure discloses a kind of pouring-in electric current carry circuit of isolation, and the carry circuit includes main current circuit and transfer current circuit, and the main current circuit is used for continuous bearing electric current or interim conducting electric current；The transfer current circuit is used for the electric current for bearing to shift to come from main current circuit；Transfer current circuit includes a kind of transformer, and can complete fast current using the transfer current circuit shifts, and realizes isolating for electric capacity charged side and straight-flow system, can be substantially reduced the voltage class and volume of charhing unit, improve the reliability of transfer.The disclosure can realize various engineering application function, such as dc circuit breaker, exchange fast chopper, AC and DC current limiter.
Description
Technical field
The disclosure belongs to electronic circuit field, more particularly to a kind of pouring-in electric current carry circuit of isolation.
Background technology
Dc circuit breaker is the guarantee of DC power-supply system safe operation, because not having natural zero-crossing point in DC current,
By by very big restriction by the way of directly cut-offfing, the effective thinking for solving this problem is to create electricity based on electric current transfer
Flow through the new of zero point and cut-off mode.The mode of electric current transfer can be divided into natural electric current transfer and impressed current shifts two kinds of sides
Formula.Wherein the effect of natural electric current branch mode is influenceed by many factors such as component parameters, element cooperation, conditions of work,
Practical implementation has many restrictions.By comparison, the mode of impressed current transfer has higher engineering application value.Typical base
Recharged capacitance of the series and parallel in transfer current circuit is used in impressed current branch mode, the anti-of its electric discharge generation is utilized
Short circuit current flow is resisted to pulse current, and then zero crossing is created in mechanical breaker, in addition, as electric current is noted into electric capacity
Enter, capacitance voltage is gradually increasing, the voltage constantly risen can finally resist system voltage, realize that direct current cut-offs.It is this to force
Electric current branch mode has obtained relatively broad application in dc circuit breaker.
Utility model content
Based on this, the disclosure discloses a kind of magnetic coupling conversion type carry circuit, and the circuit includes main current circuit, turned
Move current circuit and access interface；
The main current circuit is used for continuous bearing electric current or interim conducting electric current；
The transfer current circuit is used for the electric current for bearing to shift to come from main current circuit；
The access interface is used to be connected with external system.
The beneficial effect of the disclosure：1st, isolating for electric capacity charhing unit and straight-flow system can be realized, charging is substantially reduced
The voltage class and volume of unit, improve the reliability cut-off；
2nd, power semiconductor or triggered gap composition bridge-type electricity are used in the primary side side of transfer current current transformer
Road, it is possible to achieve bidirectional current is shifted, the pressure-resistant and cost of bridge circuit is low；
3rd, this capacitance current transfer method circuit is simple, part is few, and the reaction time is short, improves the open circuit using the program
The sensitivity and reliability of device.
Brief description of the drawings
Fig. 1 is the structural representation of the two-way capacitance current carry circuit according to disclosure one embodiment；
Structure when Fig. 2 is the one-way only operation according to the two-way capacitance current carry circuit of disclosure one embodiment is shown
It is intended to；
When Fig. 3 is another one-way only operation according to the two-way capacitance current carry circuit of disclosure one embodiment
Structural representation；
Fig. 4 is the two-way capacitance current carry circuit current signature schematic diagram according to disclosure one embodiment；
Principal current when Fig. 5 (a) is the transfer current according to the magnetic coupling conversion type carry circuit of disclosure one embodiment
The current direction schematic diagram of circuit；
Principal current when Fig. 5 (b) is the transfer current according to the magnetic coupling conversion type carry circuit of disclosure one embodiment
The current direction schematic diagram of circuit and transfer current circuit；
Electricity is shifted when Fig. 5 (c) is the transfer current according to the magnetic coupling conversion type carry circuit of disclosure one embodiment
The current direction schematic diagram of current circuit；
Fig. 6 is the transfer current for corresponding to Fig. 5 according to the two-way capacitance current carry circuit of disclosure one embodiment
When each circuit in curent change curve map；
Fig. 7 is the two-way capacitance current carry circuit figure according to disclosure one embodiment；
Fig. 8 is the two-way capacitance current carry circuit figure according to another embodiment of the disclosure；
Fig. 9 is the method for dividing of the hybrid circuit breaker of the two-way disjunction after being optimized according to disclosure one embodiment Fig. 8
Step schematic diagram.
Embodiment
It is described in detail below be actually only it is exemplary and be not intended to limit application and use.In addition, being not intended to
By any clear and definite of above technical field, background, brief overview or middle presentation described in detail below or the theoretical constraint implied.Remove
Non- clearly to have opposite description, otherwise word " comprising " and its different modifications, which should be understood to imply, includes described portion
Part but it is not excluded for any miscellaneous part.
In one embodiment, the disclosure discloses a kind of pouring-in electric current carry circuit of isolation, and the circuit includes master
Current circuit, transfer current circuit and access interface；
The main current circuit is used for continuous bearing electric current or interim conducting electric current；
The transfer current circuit is used for the electric current for bearing to shift to come from main current circuit；
The access interface is used to be connected with external system.
A kind of pouring-in electric current carry circuit of isolation is present embodiments provided, by the serial mutual inductor in transfer branch road,
The transformer primary side lateral capacitance electric discharge isolated with straight-flow system is controlled, it is produced pulse current, while being connected with straight-flow system
Transformer secondary side pulse current is induced to resist main current circuit electric current, make electric current from main current circuit to comprising electric capacity
The carry circuit transfer of device,
In one embodiment, the main current circuit is by the first mechanical switch, the first power electronic devices and first
One or more of current limiter composition in series or in parallel.
In the present embodiment, the main current circuit can be included with continuous bearing or interim conducting electric current, main current circuit
The A1 of one or more of mechanical switch, power electronic devices, current limiter, wire connection in series-parallel combination, main current circuit conduct
Part is transferred in this patent carry circuit, its two ends is drawn and is used as access interface of this patent to external system.
In one embodiment, the transfer current circuit includes：First circuit and second circuit；
First circuit includes：Secondary inductance device L1, the first capacitor, by the second capacitor, the second mechanical switch,
4th circuit A2 of one or more of two power electronic devices, the second current limiter, arrester connection in series-parallel combination；
The secondary inductance device L1, the first capacitor and the 4th circuit A2 are in series；
The second circuit includes：Tertiary circuit A3, the IGCT B1 to B4 being made up of recharged capacitance or superconduction inductance
With primary side inductor L0；
The IGCT B1 to B4 includes power semiconductor or triggered gap；
The IGCT B1 to B4 be in series composition loop after be in series with primary side inductor L0；
The IGCT B1 to B4 and tertiary circuit A3 constitute bridge circuit；
The primary side inductor and secondary inductance device constitute transformer.
In the present embodiment, the transfer current circuit has the ability born from main current circuit institute transfer current, bag
Containing by secondary inductance device L1, the first capacitor, can additionally include by the second capacitor, mechanical switch, power electronic devices,
4th circuit A2 of one or more of current limiter, arrester, wire connection in series-parallel combination, secondary inductance device L1, C and the 4th electricity
The first circuit that road A2 is composed in series；The tertiary circuit A3 being made up of recharged capacitance or superconduction inductance, power semiconductor
Or the second circuit that the B1 to B4 and primary side inductor L0 of triggered gap composition are composed in series, primary side inductor and the secondary electricity
Sensor constitutes transformer, and first circuit is in parallel with main current circuit, and the second circuit can insulate with the first circuit,
Can be with on-insulated.
It is different according to the sense of current, to realize transfer bidirectional current, used in the primary side side of transfer current current transformer
Power semiconductor or triggered gap composition bridge circuit.
Before electric current transfer, electric current flows through from the main current circuit in A1；Now, it is electric in the transfer current circuit
Power electronic device, trigger switch device and IGCT B1 to B4 are off the first circuit in state, the transfer current circuit
Flowed through with the no electric current of second circuit.
In one embodiment, first circuit is in parallel with main current circuit, the second circuit and the first circuit it
Between selection insulation or it is on-insulated.
More excellent, primary side inductor L0 and secondary inductance the device L1 is air-core inductor or the inductor containing magnetic core, by
One or more inductance serial or parallel connection compositions.
It is more excellent, first mechanical switch and the second mechanical switch include the standard machinery switch based on spring mechanism,
High speed machine switch based on electromagnetic repulsion force, the mechanical switch driven based on high-speed electric expreess locomotive or the high speed machine based on explosion driving
One kind in switch；
More excellent, first current limiter and the second current limiter include superconductive failure current limiter SFCL, liquid metal current limliting
One kind in device LMFCL, PTC current limiter.
More excellent, the power semiconductor includes one or many in Power Diode Pumped, IGCT, IGBT, IGCT
Individual connection in series-parallel combination.
In one embodiment, under normal operating conditions, electric current flows through from the main current circuit, now, described turn
The second power electronic devices, the second mechanical switch and the IGCT B1 to B4 moved in current circuit is in off state, described
There is no electric current to flow through in transfer current circuit；
When the pouring-in electric current carry circuit of isolation needs its transfer current, by measuring the main current circuit
Current amplitude and rate of change, determine power semiconductor or triggered gap and main current circuit in the transfer current circuit
In the first mechanical switch, whether the first power semiconductor act and corresponding action sequence.
In one embodiment, the application method comprises the following steps：
S1, current amplitude and rate of change according to main current circuit or according to the outside transfer instruction received, to master
Mechanical switch in current circuit sends sub-gate signal；
Two IGCTs of S2, the flow direction according to electric current, and then conducting thyristor B1 into B4, with tertiary circuit A3
Discharge loop is constituted with primary side inductor L0；Meanwhile, secondary inductance device L1 two ends induce the electric current in electric current, main current circuit
Gradually shifted to the first circuit；
S3, after the electric current in main circuit current is transferred completely, the capacitor charging complete in transfer current circuit is whole
Individual transfer process is completed.
The present embodiment is extended to transfer method, it is possible to achieve various engineering application function, such as dc circuit breaker, friendship
Flow fast chopper, AC and DC current limiter.On the one hand the disclosure can realize isolating for electric capacity charhing unit and straight-flow system,
The voltage class and volume of charhing unit are substantially reduced, the reliability cut-off is improved；On the other hand, in transfer current circuit mutual inductance
The primary side side of device uses power semiconductor or triggered gap composition bridge circuit, it is possible to achieve bidirectional current is shifted, bridge-type
The pressure-resistant and cost of circuit is low；The electric current transfer method circuit of the disclosure is simple, part is few, and the reaction time is short, improves reality
The sensitivity and reliability of application.
In one embodiment, a kind of pouring-in electric current carry circuit of isolation and its application method are described, as shown in Figure 1
The pouring-in electric current carry circuit structural representation of isolation, it includes main current circuit and transfer current circuit.In order to more preferable
The explanation carry circuit course of work, there is shown herein DC current according to a direction inflow and outflow disclosure direction signal
Figure, as shown in Figure 2.In Fig. 2 in the sense of current and figure of power semiconductor that may be present A1, A2, B2 and B3 arrow
Direction is consistent.Fig. 3 gives schematic diagram of the DC current according to the other direction inflow and outflow disclosure.
Referring to the disclosed pouring-in electric current carry circuit of isolation in Fig. 1,2,3, isolating pouring-in electric current carry circuit includes master
Current circuit, transfer current circuit and the end being connected with external system, main current circuit and the transfer current circuit
It is in parallel.
The main current circuit can be in mechanical switch, power electronic devices, current limiter, arrester and normal conductor
One or more connection in series-parallel combination.
The transfer current circuit include by secondary inductance device L1, capacitor C and normal conductor, capacitor, mechanical switch,
4th circuit A2 of one or more of electronic components, current limiter, arrester connection in series-parallel combination, secondary inductance device L1,
The first circuit that capacitor C and the 4th circuit A2 are composed in series.The tertiary circuit A3 being made up of recharged capacitance or superconduction inductance,
The second circuit that the IGCT B1 to B4 and primary side inductor L0 of power semiconductor or triggered gap composition are composed in series, institute
Primary side inductor and secondary inductance device composition transformer are stated, first circuit is in parallel with main current circuit, the second circuit
It can be insulated with the first circuit.
It is different according to the sense of current, to realize that bidirectional current is shifted, used in the primary side side of transfer current current transformer
Power semiconductor or triggered gap composition bridge circuit.
Under normal operating conditions, electric current flows through from the main current circuit in A1；Now, in the transfer current circuit
Power electronic devices, trigger switch device and IGCT B1 to B4 are off the first electricity in state, the transfer current circuit
The no electric current of road and second circuit flows through.
When the two-way capacitance current carry circuit is applied to dc circuit breaker, and when needing its transfer current, pass through
The current amplitude and rate of change for measuring the main current circuit determine power semiconductor or tactile in the transfer current circuit
Whether hair gap and mechanical switch, power semiconductor in main current circuit act and corresponding action sequence.
Wherein, the mechanical switch may be based on standard machinery switch, the high speed machine based on electromagnetic repulsion force of spring mechanism
Tool switch, the mechanical switch driven based on high-speed electric expreess locomotive or the high speed machine switch based on explosion driving；The current limiter includes
But it is not limited to superconductive failure current limiter SFCL, liquid metal current limiter LMFCL, PTC current limiter；The power semiconductor bag
Include but be not limited to Power Diode Pumped, IGCT, one in IGBT, IGCT or the combination of any number of serial or parallel connections.
Wherein, the primary side inductor and secondary inductance device of composition transformer are air core inductor or the inductor containing magnetic core, original
Side and secondary can be in series or in parallel using one or more inductance.The transfer current second circuit is by power power electricity
B1 to the B4 composition bridge circuits of sub- device or triggered gap composition.
Fig. 4 gives transfer current circuit each branch current mark, wherein i0 be transfer current second circuit in flow through A3
With the electric current on inductor primary side L0, i1 is the electric current for flowing through main current circuit, i2 be flow through in the circuit of transfer current first A2,
Capacitor C and inductor secondary L1 electric current.
In main current circuit, so that electric current flows from left to right as an example, Fig. 5 (a) -5 (c) gives during transfer current each
The road sense of current, specific each branch current direction for the correspondence moment each from t1 to t5.The electric current that Fig. 6 gives each branch road becomes
Change curve.
In one embodiment, referring to Fig. 9, comprised the following steps using the described pouring-in electric current application method of isolation.
In first step S1, sub-gate signal is sent to main current loop mechanical switch A1.Prolong because mechanical switch action has
When, now not yet form fracture.
In second step S2, according to direction of current flow, controller is into the carry circuit second circuit in bridge-type
IGCT B2 to B4 two of which send Continuity signal.Tertiary circuit A3 and primary side inductor L0 formation discharge loops.Meanwhile,
Electric current is induced in the secondary inductance device L1 of the circuit of transfer current first.Main current loop electric current is gradually to the electricity of transfer current first
Shift on road.After a period of time, whole electric currents are transferred to the circuit of transfer current first.Fracture is formed between subsequent mechanical switch contact.
In third step S3, after electric current transfer is finished, system gives the capacitor charging of transfer branch road, and whole transfer process is complete
Into.
In one embodiment, referring to Fig. 9, using isolating the dc circuit breaker that pouring-in electric current carry circuit is constituted
Specific operating procedure includes the following aspects, and electric current is entered exemplified by the right side goes out by a main current circuit left side：
System is normally run, and mechanical switch closure, IGCT disconnects, and electric current is all from the mechanical switch in main current circuit
Flow through, such as shown in Fig. 5 (a), wherein system nominal current is I.
Short trouble occurs for t1 moment, system, and main current circuit electric current is begun to ramp up, between t0 and t1, when more than system
During short-circuit threshold value, controller sends sub-gate signal to main current loop mechanical switch A1.Because mechanical switch action has delay, this
Shi Shangwei formation fractures.
T2 moment, conducting thyristor B2, B3, capacitor A3 and transformer primary side side L0 the formation discharge loop of precharge.
Simultaneously electric current I2 is induced in the transformer secondary side L1 of the circuit of transfer current circuit first.Main circuit current is gradually to transfer
Shifted in the circuit of current circuit first, shown in such as Fig. 5 (b).System capacitor A2 into transfer current circuit charges.
T3 moment, main circuit current is transferred completely into the circuit of transfer current circuit first, shown in such as Fig. 5 (c).It is then mechanical
Switch contact two ends form fracture.
At the t4 moment, it is suitable with system voltage that system charges to A2 voltages to transfer current circuit capacitor A2, transfer current
Circuital current is zero, cut-offs end.
At the t5 moment, transfer current circuit second circuit electric current is zero.
It is not required in transfer current circuit described in the disclosure only comprising a transformer, can is multiple transformers
And its serial or parallel connection combination of primary side lateral circuit, as shown in Figure 7, Figure 8.
The disclosure discloses a kind of pouring-in electric current carry circuit of isolation, including main current circuit and transfer current electricity
Road.Transfer current circuit includes a kind of transformer, and can complete fast current using the transfer current circuit shifts, and realizes electricity
Capacity charge side isolates with straight-flow system.The voltage class and volume of charhing unit can be substantially reduced, the reliable of transfer is improved
Property.
Although being described above in association with accompanying drawing embodiment of this disclosure, the disclosure is not limited to above-mentioned
Specific embodiments and applications field, above-mentioned specific embodiment is only schematical, guiding, rather than restricted
's.One of ordinary skill in the art is under the enlightenment of this specification and is not departing from disclosure scope of the claimed protection
In the case of, the form of many kinds can also be made, these belong to the row of disclosure protection.
Claims (7)
1. the pouring-in electric current carry circuit of one kind isolation, it is characterised in that：The circuit includes main current circuit, transfer current electricity
Road and access interface；
The main current circuit is used for continuous bearing electric current or interim conducting electric current；
The transfer current circuit is used for the electric current for bearing to shift to come from main current circuit；
The access interface is used to be connected with external system；
The main current circuit is by one or more of the first mechanical switch, the first power electronic devices and first current limiter
Composition in series or in parallel；
The transfer current circuit includes：First circuit and second circuit；
First circuit includes：Secondary inductance device L1, the first capacitor, by the second capacitor, the second mechanical switch, the second electricity
4th circuit A2 of one or more of power electronic device, the second current limiter, arrester connection in series-parallel combination；
The secondary inductance device L1, the first capacitor and the 4th circuit A2 are in series；
The second circuit includes：Tertiary circuit A3, IGCT B1 to B4 and the primary side inductance of recharged capacitance or inductance composition
Device L0；
The IGCT B1 to B4 includes power semiconductor or triggered gap；
The IGCT B1 to B4 be in series composition loop after be in series with primary side inductor L0；
The IGCT B1 to B4 and tertiary circuit A3 constitute bridge circuit；
The primary side inductor and secondary inductance device constitute transformer.
2. circuit according to claim 1, it is characterised in that：First circuit is in parallel with main current circuit, and described
Selection insulation or on-insulated between two circuits and the first circuit.
3. circuit according to claim 1, it is characterised in that：Primary side inductor L0 and secondary inductance the device L1 is hollow
Inductor or the inductor containing magnetic core, are made up of one or more inductance serial or parallel connections.
4. circuit according to claim 1, it is characterised in that：First mechanical switch and the second mechanical switch include base
Standard machinery switch in spring mechanism, the high speed machine switch based on electromagnetic repulsion force, the machinery driven based on high-speed electric expreess locomotive are opened
Close or based on explosion driving high speed machine switch in one kind.
5. circuit according to claim 1, it is characterised in that：First current limiter and the second current limiter include superconduction event
Hinder one kind in current limiter SFCL, liquid metal current limiter LMFCL, PTC current limiter.
6. circuit according to claim 1, it is characterised in that：The power semiconductor includes Power Diode Pumped, crystalline substance
The connection in series-parallel of one or more of brake tube, IGBT, IGCT is combined.
7. the either circuit according to claim 1-3,6, it is characterised in that：
Under normal operating conditions, the electric current of the circuit flows through from the main current circuit, now, the transfer current circuit
In the second power electronic devices, the second mechanical switch and IGCT B1 to B4 be in off state, the transfer current electricity
There is no electric current to flow through in road；
When the pouring-in current circuit of isolation needs its transfer current, by the current amplitude for measuring the main current circuit
And rate of change, determine power semiconductor in the transfer current circuit or first in triggered gap and main current circuit
Whether mechanical switch, the first power semiconductor act and corresponding action sequence.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621083893.1U CN206559026U (en) | 2016-09-27 | 2016-09-27 | The pouring-in electric current carry circuit of one kind isolation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621083893.1U CN206559026U (en) | 2016-09-27 | 2016-09-27 | The pouring-in electric current carry circuit of one kind isolation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879621A (en) * | 2018-07-25 | 2018-11-23 | 西安交通大学 | A kind of current-injection type dc circuit breaker and cutoff method based on capacitor self-charging |
| CN115549028A (en) * | 2022-09-27 | 2022-12-30 | 湖南工程学院 | Series hybrid circuit breaker based on double-coupling inductor |
-
2016
- 2016-09-27 CN CN201621083893.1U patent/CN206559026U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879621A (en) * | 2018-07-25 | 2018-11-23 | 西安交通大学 | A kind of current-injection type dc circuit breaker and cutoff method based on capacitor self-charging |
| CN115549028A (en) * | 2022-09-27 | 2022-12-30 | 湖南工程学院 | Series hybrid circuit breaker based on double-coupling inductor |
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