CN206517311U - Modularization multi-level converter - Google Patents
Modularization multi-level converter Download PDFInfo
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- CN206517311U CN206517311U CN201720238559.7U CN201720238559U CN206517311U CN 206517311 U CN206517311 U CN 206517311U CN 201720238559 U CN201720238559 U CN 201720238559U CN 206517311 U CN206517311 U CN 206517311U
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Abstract
Embodiment of the present utility model provides a kind of modularization multi-level converter.The modularization multi-level converter includes three-phase power line, dc bus and the first bridge arm circuit, the second bridge arm circuit, the 3rd bridge arm circuit and the condenser network that are connected between three-phase power line and dc bus；First bridge arm circuit, the second bridge arm circuit, the 3rd bridge arm circuit include two arm paths, and multiple power models are in series between the first end of arm path and the second end and first end and the 3rd end；It is provided with first bridge arm circuit in first switch device, the second bridge arm circuit and is provided with second switch device；Condenser network is connected in parallel with the first bridge arm circuit or the second bridge arm circuit, and the 3rd switching device is provided with condenser network.Using the technical solution of the utility model, it is possible to achieve the four quadrant running of AC DC, and full-bridge mode and half-bridge mode are supported, can easily carry out MMC researchs in the case of saving cost is low.
Description
Technical field
The utility model is related to electric and electronic technical field, more particularly to a kind of modularization multi-level converter.
Background technology
Modularization multi-level converter (Modular Multilevel Converter, MMC) is by multiple structure identicals
Submodule (Sub-module, SM) cascade is constituted, and has the advantages that cascade converter, has extensively in high-voltage dc transmission electrical domain
General application prospect.Because the voltage class in MMC practical application engineering is higher, it is necessary to substantial contribution be put into, therefore, in control
, it is necessary to carry out numerous studies to MMC control method in laboratory needle in the case of technology processed is jejune.In MMC research,
Half-bridge mode is to study MMC most simple system, and power model minimum number can save numerous studies cost.But, it is traditional
MMC only supports three phase full bridge topological structure, does not support half-bridge mode, causes MMC research cost higher.
Utility model content
Embodiment of the present utility model provides a kind of modularization multi-level converter, to solve modularization of the prior art
The problem of multilevel converter does not support half-bridge mode.
To reach above-mentioned purpose, embodiment of the present utility model provides a kind of modularization multi-level converter, including three-phase
Supply line and dc bus, and be connected between three-phase power line and dc bus the first bridge arm circuit, the second bridge
Arm circuit, the 3rd bridge arm circuit and condenser network；Wherein, the first bridge arm circuit, the second bridge arm circuit, the 3rd bridge arm circuit difference
Connect the phase supply line in three-phase power line；First bridge arm circuit, the second bridge arm circuit, the 3rd bridge arm circuit include
Two arm paths, the first end phase supply line connection corresponding with three-phase power line of two arm paths, two
The second end and the 3rd end of individual arm path are connected with the malleation bus and negative pressure bus of dc bus respectively, and the of arm path
Multiple power models are in series between one end and the second end and between first end and the 3rd end；Set in first bridge arm circuit
Have in the first switch device for the first arm path to be cut out to modularization multi-level converter, the second bridge arm circuit and be provided with
Second switch device for the second arm path to be cut out to modularization multi-level converter；Condenser network and the first bridge arm circuit
Or second bridge arm circuit be connected in parallel, be provided with condenser network for capacitive branch to be cut out into modularization multi-level converter
3rd switching device；Condenser network includes two capacitive branch being connected in parallel, the first end of two capacitive branch and the first bridge
Arm circuit or the connection of the second bridge arm circuit corresponding phase supply line, the second end of two capacitive branch respectively with dc bus
Malleation bus and negative pressure bus connection.
Alternatively, when modularization multi-level converter is operated in the first mode of operation, first switch device is opened with second
Device closure is closed, the 3rd switching device disconnects；And/or, when modularization multi-level converter is operated in the second mode of operation, the
Another in a closure in one switching device and second switch device, first switch device and second switch device is with the
Three switching devices disconnect；And/or, when modularization multi-level converter is operated in three mode of operations, first switch device with
Second switch device disconnects, the 3rd switching device closure.
Alternatively, each power model includes drive control plate, power supply unit, module dc bus, and is connected to driving
H-bridge circuit between control panel and module dc bus；The first binding post and the second wiring are provided with module dc bus
Terminal, the ac output end of H-bridge circuit is provided with the 3rd binding post and the 4th binding post；Wherein, the first binding post and
One in second binding post with lead-out terminal that one in the 3rd binding post and the 4th binding post is power model；
Or, the 3rd binding post and the lead-out terminal that the 4th binding post is power model.
Alternatively, H-bridge circuit includes four MOSFET elements being connected with drive control plate.
Alternatively, power supply unit includes the first power supply interface, and the first power supply interface is connected with module dc bus；And/or, electricity
Source portion includes the second power supply interface, and the second power supply interface is used to connect external power module.
Alternatively, first switch device is arranged on the first end of two arm paths and corresponding one in the first bridge arm circuit
Between phase supply line；Or, first switch device is arranged on the second end and of two arm paths of the first bridge arm circuit
Between three ends and the malleation bus and negative pressure bus of dc bus.
Alternatively, second switch device is arranged on the first end of two arm paths and corresponding one in the second bridge arm circuit
Between phase supply line；Or, second switch device is arranged on the second end and of two arm paths of the second bridge arm circuit
Between three ends and the malleation bus and negative pressure bus of dc bus.
Alternatively, the first end of two capacitive branch passes through the 3rd switching device and the first bridge arm circuit or the second bridge arm electricity
The corresponding phase supply line connection in road；Or, the 3rd switching device is arranged on two capacitive branch and direct current of condenser network
Between the malleation bus and negative pressure bus of bus.
Alternatively, modularization multi-level converter also includes being in series with the 4th switch dress in controller, three-phase power line
Put, the two ends of the 4th switching device are parallel with charging resistor；Controller is connected with the 4th switching device, and in power model charging
The 4th switching device of control closure when reaching preset state.
Alternatively, the 5th switching device is also in series with three-phase power line, controller controls leading for the 5th switching device
Logical or closure；And/or, manual switchgroup is also in series with three-phase power line.
The modularization multi-level converter of embodiment of the present utility model, by three-phase power line and two bridge arm electricity
Switch is set between road, to control the working condition of two bridge arm circuits, and increases electric capacity by setting capacitive branch, right
In the case that dc bus provides extra support so that the modularization multi-level converter supports half-bridge mode, so that by changing
Become internal links circuit to realize modularization multi-level converter to topological structures such as three phase full bridge, two-phase full-bridge and two-phase half-bridges
Compatibility；The modularization multi-level converter can be used for the four quadrant running of AC-DC, and cause the modular multilevel
Transverter also supports half-bridge mode on the basis of full-bridge mode is supported, can easily be carried out in the case of saving cost is low
MMC is studied.
Brief description of the drawings
Fig. 1 is the structural representation of the modularization multi-level converter of embodiment of the present utility model；
Fig. 2 is the three phase full bridge topological structure schematic diagram of the modularization multi-level converter of embodiment of the present utility model；
Fig. 3 is the two-phase full-bridge topologies schematic diagram of the modularization multi-level converter of embodiment of the present utility model；
Fig. 4 is the two-phase half-bridge topology schematic diagram of the modularization multi-level converter of embodiment of the present utility model；
Fig. 5 is the structural representation of the power model of the modularization multi-level converter of embodiment of the present utility model.
Description of reference numerals：
1st, the first bridge arm circuit；2nd, the second bridge arm circuit；3rd, the 3rd bridge arm circuit；4th, condenser network；5th, the first terminals
Son；6th, the second binding post；7th, the 3rd binding post；8th, the 4th binding post；9th, drive control plate；10th, module dc bus；
11st, the first power supply interface；12nd, the second power supply interface；13rd, communication interface.
Embodiment
The modularization multi-level converter of embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the modularization multi-level converter of embodiment of the present utility model.
As shown in figure 1, the modularization multi-level converter includes three-phase power line and dc bus, and it is connected to three
The first bridge arm circuit 1, the second bridge arm circuit 2, the 3rd bridge arm circuit 3 and condenser network between phase supply line and dc bus
4；Wherein, the first bridge arm circuit 1, the second bridge arm circuit 2, the 3rd bridge arm circuit 3 connect the phase in three-phase power line respectively
Supply line；First bridge arm circuit 1, the second bridge arm circuit 2, the 3rd bridge arm circuit 3 include two arm paths, two bridge arms
Corresponding with the three-phase power line phase supply line connection of the first end of branch road, the second end of two arm paths and the
Three ends respectively with the malleation bus DC+ and negative pressure bus DC of dc bus-be connected；First bridge arm circuit 1 is provided with for by the
One bridge arm circuit 1, which is cut out, to be provided with the first switch device of modularization multi-level converter, the second bridge arm circuit 2 for by the
Two bridge arm circuits 2 cut out the second switch device of modularization multi-level converter, between the first end of arm path and the second end
And multiple power model M are in series between first end and the 3rd end；The bridge arm circuit 1 of condenser network 4 and first or the second bridge
Arm circuit 2 is connected in parallel, and is provided with condenser network 4 for condenser network 4 to be cut out into the 3rd of modularization multi-level converter the
Switching device；Condenser network 4 includes two capacitive branch being connected in parallel, and (two capacitive branch include electric capacity C1 and electric capacity respectively
C2), the phase supply line connection corresponding with the first bridge arm circuit or the second bridge arm circuit of the first end of two capacitive branch, two
Second end of individual capacitive branch respectively with the malleation bus DC+ and negative pressure bus DC of dc bus-be connected.
In the modularization multi-level converter, by controlling first switch device, second switch device and the 3rd switch
The break-make of device (not shown), the first bridge arm circuit 1, the second bridge arm circuit 2 and condenser network 4 can be controlled respectively whether
The loop of electrically connected closure is formed with three-phase power line and dc bus, that is, the first bridge arm circuit 1 of control, the second bridge
Whether arm circuit 2 and condenser network 4, which cut out, controls the modularization multi-level converter, to control the first bridge arm circuit 1, the second bridge
The working condition of arm circuit 2 and condenser network 4, and then control the topology knot of operating circuit in the modularization multi-level converter
Structure, it is possible to achieve the four quadrant running of AC-DC, and cause the modularization multi-level converter to support multiple-working mode,
Facilitate laboratory research MMC control method.Moreover, in the modularization multi-level converter, being filled by disconnecting first switch
Put with second switch device to disconnect the first bridge arm circuit 1 and the second bridge arm circuit 2 so that the modularization multi-level converter
Operating circuit only includes the 3rd bridge arm circuit 3 being connected with B phases supply line, and the electric capacity electricity being connected with C phases supply line
Road 4, using the electric capacity C1 and C2 in condenser network 4 in the case where providing extra support for dc bus, with the 3rd bridge arm
The formation half-bridge circuit of circuit 3 so that the modularization multi-level converter supports half-bridge mode, and then in laboratory research MMC
Cost can be saved.
In actual application scenarios, it is in series with alternating current in the three-phase power line of the modularization multi-level converter and adopts
Gone here and there in model PT, three-phase reactor, the arm path of the first bridge arm circuit 1, the second bridge arm circuit 2 and the 3rd bridge arm circuit 3
Single-phase reactor and current Hall sensor are associated with, to ensure the normal work of the modularization multi-level converter.For example, three
Connect three-phase reactor L2, connected in each arm path single-phase reactor L1 and current Hall sensor in phase supply line
CT1。
According to embodiment of the present utility model, the modularization multi-level converter at least includes three kinds of mode of operations.
In the first mode of operation, first switch device is closed with second switch device, and the 3rd switching device disconnects.As schemed
Shown in 1 and Fig. 2, in the first mode of operation, condenser network 4 is powered off, the first bridge arm circuit 1, the second bridge arm circuit 2 and the 3rd bridge
Arm circuit 3 connects A, B and C three-phase power line respectively, being capable of normal work so that the work of the modularization multi-level converter
Make circuit formation three phase full bridge topological structure.
In the second mode of operation, first switch device and a closure in second switch device, first switch device
Disconnected with another in second switch device with the 3rd switching device.As shown in figures 1 and 3, will in the second mode of operation
First switch device is closed, and second switch device and the 3rd switching device is disconnected, the bridge arm circuit 2 of condenser network 4 and second is equal
Power-off, the first bridge arm circuit 1 and the 3rd bridge arm circuit 3 connect A and C two-phases supply line respectively, being capable of normal work so that this
The operating circuit formation two-phase full-bridge topologies of modularization multi-level converter.
In three mode of operations, first switch device disconnects with second switch device, the 3rd switching device closure.As schemed
Shown in 1 and Fig. 4, in three mode of operations, the first bridge arm circuit 1 and the second bridge arm circuit 2 are powered off, the 3rd bridge arm circuit 3
A and C two-phases supply line is connected respectively with condenser network 4, being capable of normal work so that the work of the modularization multi-level converter
Make circuit formation two-phase half-bridge topology.
For example, the first end of two arm paths and the junction of A phases supply line in the first bridge arm circuit 1 are set
First switch device, to control break-make electrically connected between the first bridge arm circuit 1 and A phases supply line；Or, in the first bridge
The second end and the 3rd end of two arm paths of arm circuit 1 and the malleation bus DC+ and negative pressure bus DC of dc bus-company
Meet place and first switch device be set respectively, with control respectively two arm paths and malleation bus DC+ and negative pressure bus DC-between
Electrically connected break-make.
The first end of two arm paths in the second bridge arm circuit 2 and the junction of B phases supply line set second
Switching device, to control break-make electrically connected between the second bridge arm circuit 2 and B phases supply line；Or, in the second bridge arm electricity
The second end and the 3rd end of two arm paths on road 2 and the malleation bus DC+ and negative pressure bus DC of dc bus-junction
Second switch device is set respectively, with control respectively two arm paths and malleation bus DC+ and negative pressure bus DC-between electric power
The break-make of connection.
First end and the connection of A phases supply line (or C phases supply line) in two capacitive branch of condenser network 4
Place sets the 3rd switching device, to control break-make electrically connected between condenser network 4 and A phases supply line；Or, in electric capacity
Two capacitive branch of circuit 4 and the malleation bus DC+ of dc bus and negative pressure bus DC-junction set the 3rd to open respectively
Close device, with control two electric capacity and malleation bus DC+ and negative pressure bus DC-between electrically connected break-make.
, can be with by controlling above-mentioned first switch device, second switch device and disconnection and the closure of the 3rd switching device
Realize the change to the modularization multi-level converter internal wiring annexation, the first bridge arm circuit 1 of control control, the second bridge
Arm circuit 2 and condenser network 4 whether cut out the modularization multi-level converter according to, make the modularization multi-level converter according to
Above-mentioned three kinds of mode of operations are operated, and then realize three kinds of topological structures (three phase full bridge, two-phase full-bridge and two-phase half-bridge), are carried
The compatibility of the high modularization multi-level converter and flexibility, the convenient research for carrying out MMC control methods.
Further, the power model M in above-mentioned each arm path includes drive control plate 9, power supply unit, module direct current mother
Line 10 and H-bridge circuit.H-bridge circuit is connected between drive control plate 9 and module dc bus 10, is set on module dc bus 10
The first binding post 5 and the second binding post 6 are equipped with, the ac output end of H-bridge circuit is provided with the 3rd binding post 7 and the 4th
Binding post 8.
Wherein, the first binding post 5 and the DC output terminal that the second binding post 6 is power model M, the 3rd terminals
The AC output terminal that the binding post 8 of son 7 and the 4th is power model M.Based on this four binding posts, power model M is at least
With two kinds of output modes.
In the first output mode, one in the first binding post 5 and the second binding post 6 and the 3rd binding post
7 and the 4th one in binding post 8 be power model M lead-out terminal, in the first binding post 5 and the second binding post 6
Another with the 3rd binding post 7 and the 4th binding post 8 another is hanging.That is, in the first output mode,
Power model M is exported using a DC output terminal and an AC output terminal as lead-out terminal.Now, the module
Change multilevel converter one modularization multi-level converter based on half-bridge of formation, that is, MMC.
In second of output mode, the 3rd binding post 7 and the 4th 8 power model M of binding post lead-out terminal,
That is, power model M is exported using two AC output terminals as lead-out terminal.Now, the modular multilevel change of current
Device one modularization multi-level converter based on H bridges of formation, that is, F-MMC (Full-bridge Modular
Multilevel Converter)。
In the present embodiment, by selecting power model M lead-out terminal, the modularization multi-level converter shape can be caused
Into two kinds of topological structures of MMC and F-MMC.Under three kinds of mode of operations of the above-mentioned modularization multi-level converter, the modularization
Multilevel converter can form six kinds of topological structures, be MMC three phase full bridges, MMC two-phases full-bridge, MMC two-phases half-bridge, F- respectively
MMC three phase full bridges, F-MMC two-phases full-bridge, F-MMC two-phase half-bridges.Based on this six kinds of topological structures, the modular multilevel change of current
Device can be as a four-quadrant rectifier, to realize rectification, inversion, capacitive reactive power, inductive reactive power four quadrant running.Moreover,
Due to being in series with multiple power model M in each arm path in modularization multi-level converter, it is possible to use this series connection
Structure transverter is accomplished very high voltage, so that application is to HVDC field of power transmission.
Further, power model M power supply unit includes the first power supply interface 11 and the/the second power supply interface 12.
As shown in figure 5, the first power supply interface 11 and the second power supply interface 12 are arranged in drive control plate 9, the first power supply
Interface 11 is connected with switch K1, and the second power supply interface 12 is connected with switch K2.By selecting closure switch K1 or K2, it can select
First power supply interface 11 or the second power supply interface 12 are powered to drive control plate 9 so that drive control plate 9 can drive H bridges electricity
Road, it is ensured that power model M is normally run.
Wherein, the first power supply interface 11 is connected with module dc bus 10.Start work in the modularization multi-level converter
When making, any of the above-described bridge arm circuit is formed after electrically connected loop with supply line and dc bus, and power model M obtains electric,
Module dc bus 10 also it is electric.The power taking of first power supply interface, 11 slave module dc bus 10, and powered for drive control plate 9,
So that power model M is normally run.In actual applications, Support Capacitor C3 can also be connected with module dc bus 10.
Second power supply interface 12 is used to connect external power module.For example, the second power supply interface 12 can connect external
24V dc sources so that the second power supply interface 12 can support power M normally to run.
That is, the compatible outer power supplies of power model M and two kinds of mode of operations of automatic electricity getting.
In a kind of feasible embodiment, the H-bridge circuit in power model M is by four gold being connected with drive control plate 9
Category oxide semiconductor field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor,
MOSFET) element is constituted.As shown in figure 5, drive control plate 9 is connected with four MOSFET elements (Q1, Q2, Q3 and Q4), and can
Four MOSFET elements are driven to send four road drive signals.Certainly, in other embodiments, can also be using other members
Part forms H-bridge circuit, for example, replacing MOSFET to constitute H-bridge circuit using IGBT.
In the present embodiment, in order to realize the accurate control to the modularization multi-level converter, the modular multilevel is changed
Flowing device also includes controller (not shown).
For example, being in series with the 4th switching device QF3 in three-phase power line, the 4th switching device QF3 two ends are parallel with
Charging resistor Rr.Controller is connected with the 4th switching device QF3, and when power model M chargings reach preset state, control the
Four switching device QF3 are closed.
When the modularization multi-level converter is started working, the charging resistor in three-phase power line starts as each bridge arm
Power model M chargings in branch road.When controller detects power model M chargings and reaches preset state, control the 4th is switched
Device QF3 is closed, to bypass charging resistor Rr.Wherein, the 4th switching device QF3 is chosen as three-phase contactor.
For another example being also in series with the 5th switching device for controlling three-phase power line break-make in three-phase power line
QF2, controller is connected with the 5th switching device QF2, and controls the 5th switching device QF2 conducting or closure.5th switch dress
Put QF2 and be chosen as three-phase contactor, conducting or the closure of the three-phase contactor are controlled by controller, it is possible to achieve to module
Change multilevel converter start or close automatically control.In addition, hand switch dress can also be in series with three-phase power line
QF1 is put, to facilitate the manual control for starting to modularization multi-level converter or closing.
In addition, controller also with the communication interface 13 (such as optical fiber transceiving port) in the drive control plate 9 in power model M
Connection, controller carries out data interaction by optical fiber transceiving port and power model M, and controller issues start and stop to power model M
Order and pwm signal etc., power model M uploads its status information and AD sampled signals etc..In this way, controller can control it is each
Power model M co-ordinations, and then ensure the normal operation of whole modularization multi-level converter.
The modularization multi-level converter of embodiment of the present utility model has the following advantages that：
Realize modularization multi-level converter to three phase full bridge, two-phase full-bridge and two-phase by changing internal links circuit
The compatibility of half-bridge so that the modularization multi-level converter also supports half-bridge mode on the basis of full-bridge mode is supported, can
In the case of saving cost is low, MMC researchs are easily carried out；
Further, realize modularization multi-level converter to MMC and F- by selecting the lead-out terminal of power model
MMC compatibility so that modularization multi-level converter compatibility MMC three phase full bridges, MMC two-phases full-bridge, MMC two-phases half-bridge, F-
MMC three phase full bridges, F-MMC two-phases full-bridge, F-MMC two-phase half-bridges, totally six kinds of topological structures, are provided for research MMC and F-MMC
Great convenience；
Further, by setting outer power supply interface in touching block in power and asking for electrical interface so that power model is compatible
Outer power supply and two kinds of mode of operations of automatic electricity getting.
It may be noted that the need for according to implementation, all parts described in this application can be split as into more multi-part, also may be used
The part operation of two or more parts or part is combined into new part, to realize the purpose of this utility model.
It is described above, embodiment only of the present utility model, but protection domain of the present utility model do not limit to
In this, any one skilled in the art can readily occur in change in the technical scope that the utility model is disclosed
Or replace, it should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with the power
The protection domain that profit is required is defined.
Claims (10)
1. a kind of modularization multi-level converter, it is characterised in that including three-phase power line and dc bus, and be connected to
The first bridge arm circuit (1), the second bridge arm circuit (2), the 3rd bridge arm circuit between the three-phase power line and dc bus
And condenser network (4) (3)；
Wherein, first bridge arm circuit, the second bridge arm circuit, the 3rd bridge arm circuit are connected in the three-phase power line respectively
A phase supply line；
First bridge arm circuit, the second bridge arm circuit, the 3rd bridge arm circuit include two arm paths, described two bridge arms
Corresponding with the three-phase power line phase supply line connection of the first end of branch road, the of described two arm paths
Two ends and the 3rd end are connected with the malleation bus and negative pressure bus of the dc bus respectively, the first end of the arm path and
Multiple power models are in series between second end and between the first end and the 3rd end；
It is provided with first bridge arm circuit (1) for first bridge arm circuit (1) to be cut out into the modular multilevel
It is provided with the first switch device of transverter, second bridge arm circuit (2) for second bridge arm circuit (2) to be cut out
The second switch device of the modularization multi-level converter；The condenser network (4) and first bridge arm circuit (1) or institute
State the second bridge arm circuit (2) to be connected in parallel, be provided with the condenser network (4) for the condenser network (4) to be cut out into institute
State the 3rd switching device of modularization multi-level converter；
The condenser network (4) includes two capacitive branch for being connected in parallel, the first end of described two capacitive branch with it is described
First bridge arm circuit (1) or the corresponding phase supply line connection of second bridge arm circuit (2), described two capacitive branch
Second end is connected with the malleation bus and negative pressure bus of the dc bus respectively.
2. modularization multi-level converter according to claim 1, it is characterised in that when the modular multilevel change of current
When device is operated in the first mode of operation, the first switch device is closed with second switch device, and the 3rd switching device breaks
Open；And/or,
When the modularization multi-level converter is operated in the second mode of operation, the first switch device is filled with second switch
Another in a closure in putting, the first switch device and second switch device is disconnected with the 3rd switching device
Open；And/or,
When the modularization multi-level converter is operated in three mode of operations, the first switch device is filled with second switch
Put disconnection, the 3rd switching device closure.
3. modularization multi-level converter according to claim 2, it is characterised in that each power model includes driving
Dynamic control panel (9), power supply unit, module dc bus (10), and it is connected to the drive control plate (9) and module dc bus
(10) H-bridge circuit between；
The first binding post (5) and the second binding post (6), the H-bridge circuit are provided with the module dc bus (10)
Ac output end be provided with the 3rd binding post (7) and the 4th binding post (8)；
Wherein, one in first binding post (5) and the second binding post (6) and the 3rd binding post (7) and
A lead-out terminal for the power model in 4th binding post (8)；
Or, the 3rd binding post (7) and the lead-out terminal that the 4th binding post (8) is the power model.
4. modularization multi-level converter according to claim 3, it is characterised in that the H-bridge circuit include four with
The MOSFET element of drive control plate (9) connection.
5. modularization multi-level converter according to claim 3, it is characterised in that the power supply unit includes the first power supply
Interface (11), first power supply interface (11) is connected with the module dc bus (10)；And/or,
The power supply unit includes the second power supply interface (12), and second power supply interface (12) is used to connect external power supply mould
Block.
6. modularization multi-level converter according to claim 1, it is characterised in that the first switch device is arranged on
In first bridge arm circuit (1) between the first end of two arm paths and a phase supply line of corresponding connection；
Or, the first switch device is arranged on the second end and of two arm paths of first bridge arm circuit (1)
Between three ends and the malleation bus and negative pressure bus of the dc bus.
7. modularization multi-level converter according to claim 1, it is characterised in that the second switch device is arranged on
In second bridge arm circuit (2) between the first end of two arm paths and a phase supply line of corresponding connection；
Or, the second switch device is arranged on the second end of two arm paths of second bridge arm circuit (2)
And the 3rd end and the dc bus malleation bus and negative pressure bus between.
8. modularization multi-level converter according to claim 1, it is characterised in that the first of described two capacitive branch
End passes through the 3rd switching device phase supply lines corresponding with first bridge arm circuit (1) or second bridge arm circuit (2)
Road is connected；Or, the 3rd switching device is arranged on two capacitive branch and the dc bus of the condenser network (4)
Malleation bus and negative pressure bus between.
9. modularization multi-level converter according to any one of claim 1 to 8, it is characterised in that the modularization
Multilevel converter also includes being in series with the 4th switching device in controller, the three-phase power line, the 4th switch dress
The two ends put are parallel with charging resistor；
The controller is connected with the 4th switching device, and controls institute when power model charging reaches preset state
State the 4th switching device closure.
10. modularization multi-level converter according to claim 9, it is characterised in that in the three-phase power line also
The 5th switching device is in series with, the controller controls conducting or the closure of the 5th switching device；
And/or, also it is in series with manual switchgroup in the three-phase power line.
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| CN113014081A (en) * | 2019-12-20 | 2021-06-22 | 新疆金风科技股份有限公司 | Self-starting circuit and starting method of direct-current energy-taking power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113014081A (en) * | 2019-12-20 | 2021-06-22 | 新疆金风科技股份有限公司 | Self-starting circuit and starting method of direct-current energy-taking power supply |
| CN113014081B (en) * | 2019-12-20 | 2022-08-09 | 新疆金风科技股份有限公司 | Self-starting circuit and starting method of direct-current energy-taking power supply |
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