CN205657603U - Power module and transverter - Google Patents
Power module and transverter Download PDFInfo
- Publication number
- CN205657603U CN205657603U CN201620447987.6U CN201620447987U CN205657603U CN 205657603 U CN205657603 U CN 205657603U CN 201620447987 U CN201620447987 U CN 201620447987U CN 205657603 U CN205657603 U CN 205657603U
- Authority
- CN
- China
- Prior art keywords
- wholly
- brachium pontis
- insulated gate
- gate bipolar
- bipolar transistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000008859 change Effects 0.000 claims description 57
- 230000005611 electricity Effects 0.000 claims description 10
- 238000002955 isolation Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical compound CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model relates to a power module and transverter, first accuse type full device concatenates with second accuse type full device in the power module, and second accuse type full device concatenates with third accuse type full device is reverse, first diode and first accuse type full device reverse parallel connection, second diode and second accuse type full device reverse parallel connection, third diode and third accuse type full device reverse parallel connection, first accuse type full device, second accuse type full device and third accuse type full device concatenate back and capacitance parallel connection, use in the transverter, when short -circuit fault takes place for the positive and negative extremes of transverter, as long as the power module that locks simultaneously, moreover the electric capacity in each power module voltage with be higher than its alternating voltage who connects, the current path in the power module does not just have the electric current and flows through, realizes transverter direct current the cleaing away certainly of trouble of inclining.
Description
Technical field
This utility model relates to electric and electronic technical field, particularly relates to power model and inverter.
Background technology
Along with the development of Power Electronic Technique, high voltage, Large Copacity have become the weight of Power Electronic Technique
Want developing direction, high voltage, the jumbo the most numerous occasion of power electronics inverter have important application,
As: Light HVDC Transmission (Voltage Source Converter-High Voltage Direct Current,
VSC-HVDC), STATCOM (Static Synchronous Compensator, STATCOM),
Active Power Filter-APF (Active Power Filter, APF), high voltage converter etc., and just obtaining increasing
Pay close attention to.
High voltage, jumbo power electronics inverter have various topological structures, including based on valve group string
Two level block of connection, diode clamp bit architecture, striding capacitance structure, combination converter structure, H bridge level
Connection structure, modular construction (Modular Multilevel Converter, MMC) etc..Wherein, H bridge
Cascade structure, MMC structure are because having modularized design, being easy to dilatation, exchange outlet side exit potential harmonic wave
Content is few without advantages such as alternating current filters, has more successful Application at electrical network.
Existing MMC structure all use half-H-bridge, H bridge or CDSM (Clamp Doulbe Sub-modular,
Clamp Shuangzi module) (as shown in Figure 1) as power unit module, concatenate level by the output port of module
Connection reaches high voltage, jumbo purpose.Wherein SMnRepresent the n-th power unit module, UdcRepresent
MMC Converter DC-side voltage.
The MMC structure of existing employing half H slab bridge structure does not possess direct current self-cleaning ability, in DC side event
Need to be after all modules of locking during barrier, jumping AC circuit breaker could be by fault clearance, and flow process is complicated, and event is relatively
Long.The MMC inverter using CDSM structure possesses DC Line Fault self-cleaning ability, but the power used
In unit, components and parts are more, connect and control more complicated.
Utility model content
Based on this, it is necessary to for existing modularity inverter or do not possess DC Line Fault from understanding ability,
Or possess DC Line Fault removing function but baroque problem, it is provided that a kind of power model and inverter.
A kind of power model, including the first wholly-controled device, the second wholly-controled device, the 3rd wholly-controled device,
First diode, the second diode, the 3rd diode and electric capacity；
First wholly-controled device and the second wholly-controled device concatenation, the second wholly-controled device and the 3rd full-control type device
Part reversely concatenates；First diode and the first wholly-controled device reverse parallel connection, the second diode and second is controlled entirely
Type device reverse parallel connection, the 3rd diode and the 3rd wholly-controled device reverse parallel connection, the first wholly-controled device,
Second wholly-controled device and the 3rd wholly-controled device are in parallel with electric capacity after concatenating.
A kind of inverter, including first group of three change of current brachium pontis, second group of three change of current brachium pontis, first group of bridge
Arm reactor, second group of brachium pontis reactor, three charging resistors, one group of three-phase isolation switch and an open circuit
The bar number of the change of current brachium pontis in device, first group of change of current brachium pontis and second group of change of current brachium pontis is three, first group of bridge
The number of the brachium pontis reactor in arm reactor and second group of brachium pontis reactor is three；
The positive terminal of three change of current brachium pontis in first group of change of current brachium pontis is all connected to the first junction point, second group
The negative pole end of three change of current brachium pontis in change of current brachium pontis is all connected to the second junction point；
Three bridges in the negative pole end of three change of current brachium pontis in first group of change of current brachium pontis and first group of brachium pontis reactor
One end of arm reactor connects one to one, the positive terminal of three change of current brachium pontis in second group of change of current brachium pontis with
In second group of brachium pontis reactor, one end of three brachium pontis reactors connects one to one, first group of brachium pontis reactor
In the other end one of three brachium pontis reactors in the other end of three brachium pontis reactors and second group of brachium pontis reactor
One corresponding connection；
The other end of the other end of first group of three brachium pontis reactor and second group of three brachium pontis reactor one a pair
Three junction points that should connect connect one to one with the three-phase of three-phase isolation switch, the three of three-phase isolation switch
In parallel with three charging resistor one_to_one corresponding；
Chopper is connected between the first junction point and the second junction point；
If any one change of current brachium pontis in first group of change of current brachium pontis and second group of change of current brachium pontis all includes concatenation
Dry above-mentioned power model, the first wholly-controled device and the company of the second wholly-controled device in previous power model
Contact is connected with the junction point of electric capacity with the 3rd wholly-controled device in later power model, stem after concatenation
In power model, the junction point of the 3rd wholly-controled device and electric capacity is as the positive terminal of change of current brachium pontis, the merit of afterbody
In rate module, the junction point of the first wholly-controled device and the second wholly-controled device is as the negative pole end of change of current brachium pontis.
According to above-mentioned scheme of the present utility model, the first wholly-controled device and the second full-control type device in power model
Part concatenates, and the second wholly-controled device and the 3rd wholly-controled device reversely concatenate；First diode and first is controlled entirely
Type device reverse parallel connection, the second diode and the second wholly-controled device reverse parallel connection, the 3rd diode and the 3rd
Wholly-controled device reverse parallel connection, the first wholly-controled device, the second wholly-controled device and the 3rd wholly-controled device string
Entirety after connecing is in parallel with electric capacity；During implementing, when normally working, by control signal control
Three wholly-controled device turn off, and the level that output needs, fail lockout power model, power model only has
The standby current path to electric capacity charging；Apply in inverter, when the positive and negative event that is extremely short-circuited of inverter
During barrier, if all power models of locking simultaneously, in the passage path that fault current is possible in each power model
Capacitance voltage and the alternating voltage that connected higher than inverter, the electricity in the passage path that fault current is possible
Flow path would not have electric current to flow through, it is achieved the self-cleaning of Converter DC-side fault, and compared to CDSM
The MMC inverter of structure, the structure of the power model of inverter of the present utility model is simpler, unit's device
Part is less, and inside connects and controls simpler, reduces cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the power model in conventional art and inverter；
Fig. 2 is the structural representation of the power model of one of them embodiment；
Fig. 3 is a kind of concrete structure schematic diagram of the power model of one of them embodiment；
Fig. 4 is the another kind of concrete structure schematic diagram of the power model of one of them embodiment；
Fig. 5 is the structural representation of the inverter of one of them embodiment；
Fig. 6-a be one of them embodiment inverter in a kind of electric current road of duty one of power model
Footpath schematic diagram；
Fig. 6-b be one of them embodiment inverter in the another kind of electric current of duty one of power model
Path schematic diagram；
Fig. 7-a be one of them embodiment inverter in a kind of electric current road of duty two of power model
Footpath schematic diagram；
Fig. 7-b be one of them embodiment inverter in the another kind of electric current of duty two of power model
Path schematic diagram；
Fig. 8 be one of them embodiment inverter in a kind of current path of duty three of power model
Schematic diagram；
Fig. 9-a is a kind of charging current path schematic diagram of the inverter of one of them embodiment；
Fig. 9-b is the another kind of charging current path schematic diagram of the inverter of one of them embodiment.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and
Embodiment, is described in further detail this utility model.Should be appreciated that described herein specifically
Embodiment, only in order to explain this utility model, does not limit protection domain of the present utility model.
Shown in Figure 2, it is the structural representation of the power model of an embodiment.Merit in this embodiment
Rate module, including first wholly-controled device the 110, second wholly-controled device the 120, the 3rd wholly-controled device 130,
First diode the 140, second diode the 150, the 3rd diode 160 and electric capacity 170；
First wholly-controled device 110 concatenates with the second wholly-controled device 120, the second wholly-controled device 120 with
3rd wholly-controled device 130 reversely concatenates；First diode 140 and the first wholly-controled device 110 are the most also
Connection, the second diode 150 and the second wholly-controled device 120 reverse parallel connection, the 3rd diode 160 and the 3rd
Wholly-controled device 130 reverse parallel connection, first wholly-controled device the 110, second wholly-controled device 120 and the 3rd is complete
Control type device 130 is in parallel with electric capacity 170 after concatenating.
In the present embodiment, in power model, the first wholly-controled device 110 is gone here and there with the second wholly-controled device 120
Connecing, the second wholly-controled device 120 reversely concatenates with the 3rd wholly-controled device 130；First diode 140 with
First wholly-controled device 110 reverse parallel connection, the second diode 150 and the second wholly-controled device 120 are the most also
Connection, the 3rd diode 160 and the 3rd wholly-controled device 130 reverse parallel connection, the first wholly-controled device 110, the
Two wholly-controled device 120 and the 3rd wholly-controled device 130 are in parallel with electric capacity 170 after concatenating.Implementing
During, when normally working, control three wholly-controled device by control signal and turn off, the electricity that output needs
Flat, fail lockout power model, power model only possesses the current path to electric capacity charging；Apply and changing
In stream device, when inverter positive and negative is extremely short-circuited fault, if all power models of locking simultaneously,
Capacitance voltage in each power model and the friendship that connected higher than inverter in the passage path that fault current is possible
Stream voltage, the current path in the passage path that fault current is possible would not have electric current to flow through, it is achieved the change of current
The self-cleaning of device DC side fault, and compared to the MMC inverter of CDSM structure, this utility model
The structure of power model of inverter simpler, components and parts are less, internal connect and control simpler,
Reduce cost.
Preferably, the first wholly-controled device 110 is controlled entirely with the junction point and the 3rd of the second wholly-controled device 120
The junction point of type device 130 and electric capacity 170 is as the signal terminal of described power model.The two junction point
May be used for being connected with other devices.
Wherein in an embodiment, first wholly-controled device the 110, second wholly-controled device 120 and the 3rd is complete
The type of control type device 130 is the most identical with parameter.
In the present embodiment, the first wholly-controled device the 110, second wholly-controled device 120 and the 3rd full-control type device
Part 130 is same type of wholly-controled device, and parameter is the most identical, is so easy to be uniformly controlled signal, from
And each wholly-controled device is controlled.
Wherein in an embodiment, first diode the 140, second diode the 150, the 3rd diode 160
Type the most identical with parameter.
In the present embodiment, first diode the 140, second diode the 150, the 3rd diode 160 is same
The diode of type, parameter is the most identical, is so easy to the electric current of unified each diode.
Wherein in an embodiment, the first wholly-controled device 110 and the second wholly-controled device 120 forward string
Connect.
Wherein in an embodiment, as it is shown on figure 3, the first wholly-controled device 110 is the first insulated gate pair
Bipolar transistor T1, the second wholly-controled device 120 is the second insulated gate bipolar transistor T2, and the 3rd controls entirely
Type device 130 is the 3rd insulated gate bipolar transistor T3；
The emitter stage of the first insulated gate bipolar transistor T1 and the collection of the second insulated gate bipolar transistor T2
Electrode connects, the emitter stage of the second insulated gate bipolar transistor T2 and the 3rd insulated gate bipolar transistor
The emitter stage of T3 connects；
First diode 140 is diode D1, and the second diode 150 is diode D2, the 3rd diode
160 is diode D3；
The positive pole of diode D1 and the emitter stage of the first insulated gate bipolar transistor T1 connect, diode D1
Negative pole and the first insulated gate bipolar transistor T1 colelctor electrode connect；The positive pole of diode D2 and second
The emitter stage of insulated gate bipolar transistor T2 connects, the negative pole of diode D2 and the second insulated gate bipolar
The colelctor electrode of transistor T2 connects；The positive pole of diode D3 and the 3rd insulated gate bipolar transistor T3's
Emitter stage connects, and the negative pole of diode D3 and the colelctor electrode of the 3rd insulated gate bipolar transistor T3 connect；
The positive pole of electric capacity 170 and the colelctor electrode of the first insulated gate bipolar transistor T1 connect, electric capacity 170
The colelctor electrode of negative pole and the 3rd insulated gate bipolar transistor T3 connects.
In the present embodiment, wholly-controled device is insulated gate bipolar transistor, and the first insulated gate bipolar is brilliant
Body pipe T1 and the second insulated gate bipolar transistor T2 forward concatenation, the second insulated gate bipolar transistor T2
Reversely concatenate with the 3rd insulated gate bipolar transistor T3, diode D1, diode D2, diode D3
With the first insulated gate bipolar transistor T1, the second insulated gate bipolar transistor T2, the 3rd insulated gate bipolar
Transistor npn npn T3 one_to_one corresponding reverse parallel connection, the first insulated gate bipolar transistor T1, the second insulated gate are double
Bipolar transistor T2 and the 3rd insulated gate bipolar transistor T3 is in parallel with electric capacity 170 after concatenating.By touching
Send out and control the first insulated gate bipolar transistor T1, the second insulated gate bipolar transistor T2 and the 3rd insulation
The conducting state of grid bipolar transistor T3, can make power model be in different duties, in order to defeated
Go out different level, the U in Fig. 3SMFor the output voltage of power model, iSMOutput electricity for power model
Stream, UcMagnitude of voltage for electric capacity C.
Wherein in an embodiment, the first wholly-controled device 110 is reversely gone here and there with the second wholly-controled device 120
Connect.
Wherein in an embodiment, as shown in Figure 4, the first wholly-controled device 110 is that the first insulated gate is double
Bipolar transistor T1, the second wholly-controled device 120 is the second insulated gate bipolar transistor T2, and the 3rd controls entirely
Type device 130 is the 3rd insulated gate bipolar transistor T3；
The emitter stage of the first insulated gate bipolar transistor T1 and sending out of the second insulated gate bipolar transistor T2
Emitter-base bandgap grading connects, the colelctor electrode of the second insulated gate bipolar transistor T2 and the 3rd insulated gate bipolar transistor
The colelctor electrode of T3 connects；
First diode 140 is diode D1, and the second diode 150 is diode D2, the 3rd diode
160 is diode D3；
The positive pole of diode D1 and the emitter stage of the first insulated gate bipolar transistor T1 connect, diode D1
Negative pole and the first insulated gate bipolar transistor T1 colelctor electrode connect；The positive pole of diode D2 and second
The emitter stage of insulated gate bipolar transistor T2 connects, the negative pole of diode D2 and the second insulated gate bipolar
The colelctor electrode of transistor T2 connects；The positive pole of diode D3 and the 3rd insulated gate bipolar transistor T3's
Emitter stage connects, and the negative pole of diode D3 and the colelctor electrode of the 3rd insulated gate bipolar transistor T3 connect；
The positive pole of electric capacity 170 and the colelctor electrode of the first insulated gate bipolar transistor T1 connect, electric capacity 170
The emitter stage of negative pole and the 3rd insulated gate bipolar transistor T3 connects.
In the present embodiment, wholly-controled device is insulated gate bipolar transistor, and the first insulated gate bipolar is brilliant
Body pipe T1 and the second insulated gate bipolar transistor T2 reversely concatenates, the second insulated gate bipolar transistor T2
Reversely concatenate with the 3rd insulated gate bipolar transistor T3, diode D1, diode D2, diode D3
With the first insulated gate bipolar transistor T1, the second insulated gate bipolar transistor T2, the 3rd insulated gate bipolar
Transistor npn npn T3 one_to_one corresponding reverse parallel connection, the first insulated gate bipolar transistor T1, the second insulated gate are double
Bipolar transistor T2 and the 3rd insulated gate bipolar transistor T3 is in parallel with electric capacity 170 after concatenating.By touching
Send out and control the first insulated gate bipolar transistor T1, the second insulated gate bipolar transistor T2 and the 3rd insulation
The conducting state of grid bipolar transistor T3, can make power model be in different duties, in order to defeated
Go out different level, the U in Fig. 4SMFor the output voltage of power model, iSMOutput electricity for power model
Stream, UCMagnitude of voltage for electric capacity C.
In power model of the present utility model, the first wholly-controled device 110 and the second wholly-controled device 120
Forward concatenation or reversely concatenation, and wholly-controled device can be not only insulated gate bipolar transistor,
It can also be other kinds of wholly-controled device.
According to above-mentioned power model, this utility model also provides for a kind of inverter, the most of the present utility model below
The embodiment of inverter is described in detail.
Shown in Figure 5, it is the structural representation of the inverter of an embodiment.The change of current in this embodiment
Device includes first group of change of current brachium pontis, second group of change of current brachium pontis, first group of brachium pontis reactor, second group of brachium pontis electricity
Anti-device, three charging resistors, one group of three-phase isolation switch and a chopper, first group of change of current brachium pontis and
The bar number of the change of current brachium pontis in two groups of change of current brachium pontis is three, first group of brachium pontis reactor and second group of brachium pontis electricity
The number of the brachium pontis reactor in anti-device is three；
The positive terminal of the three articles of change of current brachium pontis 210,220,230 in first group of change of current brachium pontis is all connected to the 3rd
Junction point, the negative pole end of three change of current brachium pontis 240,250,260 in second group of change of current brachium pontis is all connected to
4th junction point；
The negative pole end of three change of current brachium pontis 210,220,230 in first group of change of current brachium pontis and first group of brachium pontis
In reactor, one end of three brachium pontis reactor Lc1, Lc2, Lc3 connects one to one, second group of converter bridge
Three brachium pontis in the positive terminal of three change of current brachium pontis 240,250,260 in arm and second group of brachium pontis reactor
One end of reactor Lc4, Lc5, Lc6 connects one to one, three brachium pontis electricity in first group of brachium pontis reactor
Three brachium pontis reactor Lc4 in the other end of anti-device Lc1, Lc2, Lc3 and second group of brachium pontis reactor, Lc5,
The other end of Lc6 connects one to one；
The other end of first group three brachium pontis reactor Lc1, Lc2, Lc3 and second group of three brachium pontis reactor
Three junction points that the other end of Lc4, Lc5, Lc6 connects one to one and the three-phase of three-phase isolation switch S1
Connect one to one, the three-phase of three-phase isolation switch S1 and three charging resistors R1, R2, R3 one_to_one corresponding
In parallel；
Chopper S2 is connected between the first junction point and the second junction point；
If any one change of current brachium pontis in first group of change of current brachium pontis and second group of change of current brachium pontis all includes concatenation
Dry above-mentioned power model, the first wholly-controled device and the company of the second wholly-controled device in previous power model
Contact is connected with the junction point of described electric capacity with the 3rd wholly-controled device in later power model, first after concatenation
In the power model in portion, the junction point of the 3rd wholly-controled device and described electric capacity is as the positive pole of described change of current brachium pontis
End, in the power model of afterbody, the junction point of the first wholly-controled device and the second wholly-controled device changes as described
The negative pole end of stream brachium pontis.
In the present embodiment, above-mentioned power model is applied in inverter, when positive and negative extreme of inverter
During raw short trouble, if all power models of locking simultaneously, because of each in the passage path that fault current is possible
Capacitance voltage in power model and the alternating voltage connected higher than inverter, the path that fault current is possible
Current path in path would not have electric current to flow through, it is achieved the self-cleaning of Converter DC-side fault, and
Compared to the MMC inverter of CDSM structure, the structure of the power model of inverter of the present utility model is more
Adding simple, components and parts are less, and inside connects and controls simpler, reduces cost.
Preferably, three charging resistors R1, R2, R3 parameter are identical.
In a specific embodiment, (the Insulated with wholly-controled device as insulated gate bipolar transistor
Gate Bipolar Transistor) as a example by, the operation principle of inverter is illustrated:
Power model in inverter controls the conducting state of insulated gate bipolar transistor by triggering, permissible
Making power model be in different duties, power model one has three kinds of duties.
Duty one, insulated gate bipolar transistor T1 turns on, insulated gate bipolar transistor T2, T3
Cut-off；
Output electric current i when power modelSM< when 0, its current path is as shown in Fig. 6-a, and electric current is by insulation
Grid bipolar transistor T1 becomes path, the voltage that voltage is electric capacity C of power model output with electric capacity C-shaped
UC, electric capacity C is in discharge condition；
Output electric current i when power modelSM> 0 time, its current path as shown in Fig. 6-b, electric current pass through two poles
Pipe D1 becomes path, the voltage U that voltage is electric capacity C of power model output with electric capacity C-shapedC, at electric capacity C
In discharge condition.
Duty two, insulated gate bipolar transistor T2, T3 conducting, insulated gate bipolar transistor T1
Cut-off；
Output electric current i when power modelSM< when 0, its current path is as shown in Fig. 7-a, and electric current passes through two poles
Pipe D2 and insulated gate bipolar transistor T3 forms path, and the voltage of power model output is 0, electric capacity C
It is in bypass condition；
Output electric current i when power modelSM> 0 time, its current path as shown in Fig. 7-b, electric current by insulation
Grid bipolar transistor T2 and diode D3 forms path, and the voltage of power model output is 0, electric capacity C
It is in bypass condition.
Duty three, insulated gate bipolar transistor T1, T2, T3 are turned off；
Output electric current i when power modelSM< when 0, whole power model is in cut-off state, does not possess electricity
Circulation flow path；
Output electric current i when power modelSM> 0 time, its current path as shown in Figure 8, electric current pass through two poles
Pipe D2 becomes path, the voltage U that voltage is electric capacity C of power model output with electric capacity C-shapedC, at electric capacity C
In charged state.
Inverter needs to carry out initializing charging before normal work.From the operation principle of inverter,
In the case of the equal locking of T1, T2, T3, on inverter three-phase between brachium pontis (i.e. first group change of current brachium pontis) or
AC open circuit on path, the most only closing can not be constituted between brachium pontis (i.e. second group change of current brachium pontis) under three-phase
Device, inverter can not complete to initialize charging.This utility model is by the positive and negative electrode bus at inverter (i.e.
Inverter positive and negative extreme) between increase chopper S2, realize whole charging process, charging process divides three
The individual stage.
In the stage one, band charging resistor is charged to the half of ac line voltage.Process is: be separated by the three of AC
Leave pass S1 to disconnect, charging resistor is put into, the chopper S2 of DC side is closed, by positive and negative simultaneously
Pole bus short join, the AC chopper that then closes i.e. starts to charge up.When certain phase voltage amplitude is the highest, real
Now to brachium pontis under this phase and the charging of upper brachium pontis that remaining is biphase；When certain phase voltage amplitude is minimum, to this phase
Upper brachium pontis and the lower brachium pontis charging that remaining is biphase.As a example by A phase, when A phase voltage is the highest, it is achieved to A phase
The charging of brachium pontis on lower brachium pontis and B, C phase thereof, its charging process is as shown in Fig. 9-a；When A phase voltage is minimum,
Realizing the charging of brachium pontis lower to brachium pontis in A phase and B, C phase thereof, its charging process is as shown in Fig. 9-b.Charging
After Wen Ding, the voltage of all brachium pontis is close to the half of AC system line voltage.
In the stage two: unlock inverter, make brachium pontis all power models conducting T2, T3, remaining brachium pontis in A phase
Locking, can make the upper and lower brachium pontis of B, C phase charge to close to AC system line voltage；Then make in B phase
Brachium pontis all power models conducting T2, T3, remaining brachium pontis locking, the upper and lower brachium pontis of A phase can be made also to fill
Electricity is to close to AC system line voltage；
In the stage three: all brachium pontis of locking, cut-off breaker S2, close after three-phase isolation switch S1, again solve
Lock all brachium pontis, enter the controlled charging of normal every phase brachium pontis.On three-phase as a example by brachium pontis, implementation process is,
Make bridge all power models conducting T2, T3 in A phase, by controlling the input power of the biphase upper brachium pontis of B, C
The number of module, can make its power model charge to load voltage value；In like manner, by making bridge institute in B phase
Power model is had to turn on T2, T3, by controlling the number putting into power model of the biphase upper brachium pontis of A,
The power model making A phase also charges to load voltage value.The charging process of lower brachium pontis three-phase is similar with upper brachium pontis.
Inverter charging complete, disconnects chopper S2, after entering normal mode of operation, if it occur that the change of current
Device positive and negative electrode terminal shortcircuit fault, after all of power model of each brachium pontis of locking simultaneously, electric current is the most also deposited
Circulation path in Fig. 9-a and Fig. 9-b.But when normally working, power model capacitance voltage in above-mentioned path
Be the several times of ac line voltage, the T1 of all power models is in reverse blocking state, it is impossible to conducting,
So time Fig. 9-a and Fig. 9-b in current path electric current can not be had to flow through, i.e. achieve DC side fault from
Remove.
If it occur that one pole shorted to earth, after all of power model of each brachium pontis of locking simultaneously, the most do not deposit
At current path, also achieve the self-cleaning of DC side fault.
Disconnecting switch can be chopper, it is also possible to be the disconnecting switch of other forms possessing switching function.
Inverter of the present utility model possesses DC Line Fault self-cleaning ability, solves the semi-bridge type MMC change of current
Device need to disconnect AC circuit breaker and remove the defect of DC side fault, compares with Fig. 1 and understands, of the present utility model
Number is bridge-type MMC inverter the 3/4 of insulated gate bipolar transistor used in power model；With
CDSM compares, and many 1/2 IGBT of every level, a few diode, economy is suitable, but components and parts are relatively
Few, internal connection and control are the simplest.
In this utility model, the ordinal number such as " first ", " second " is intended merely to carry out involved parts
Distinguish, be not that parts itself are defined.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the most right
The all possible combination of each technical characteristic in above-described embodiment is all described, but, if these skills
There is not contradiction in the combination of art feature, is all considered to be the scope that this specification is recorded.
Embodiment described above only have expressed several embodiments of the present utility model, its describe more concrete and
In detail, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that, it is right
For those of ordinary skill in the art, without departing from the concept of the premise utility, it is also possible to do
Going out some deformation and improvement, these broadly fall into protection domain of the present utility model.Therefore, this utility model is special
The protection domain of profit should be as the criterion with claims.
Claims (8)
1. a power model, it is characterised in that include the first wholly-controled device, the second wholly-controled device,
3rd wholly-controled device, the first diode, the second diode, the 3rd diode and electric capacity；
Described first wholly-controled device concatenates with described second wholly-controled device, described second wholly-controled device with
Described 3rd wholly-controled device reversely concatenates；Described first diode is with described first wholly-controled device the most also
Connection, described second diode and described second wholly-controled device reverse parallel connection, described 3rd diode is with described
3rd wholly-controled device reverse parallel connection, described first wholly-controled device, described second wholly-controled device and described
3rd wholly-controled device is in parallel with described electric capacity after concatenating.
Power model the most according to claim 1, it is characterised in that described first wholly-controled device,
Described second wholly-controled device is the most identical with parameter with the type of described 3rd wholly-controled device.
Power model the most according to claim 1, it is characterised in that described first diode, described
Second diode, described 3rd diode type the most identical with parameter.
Power model the most according to claim 1, it is characterised in that described first wholly-controled device with
Described second wholly-controled device forward concatenation.
Power model the most according to claim 4, it is characterised in that described first wholly-controled device is
First insulated gate bipolar transistor, described second wholly-controled device is the second insulated gate bipolar transistor,
Described 3rd wholly-controled device is the 3rd insulated gate bipolar transistor；
The emitter stage of described first insulated gate bipolar transistor and described second insulated gate bipolar transistor
Colelctor electrode connects, the emitter stage of described second insulated gate bipolar transistor and described 3rd insulated gate bipolar
The emitter stage of transistor connects；
The positive pole of described first diode is connected with the emitter stage of described first insulated gate bipolar transistor, institute
The colelctor electrode of the negative pole and described first insulated gate bipolar transistor of stating the first diode is connected；Described second
The positive pole of diode is connected with the emitter stage of described second insulated gate bipolar transistor, described second diode
Negative pole be connected with the colelctor electrode of described second insulated gate bipolar transistor；The positive pole of described 3rd diode
Being connected with the emitter stage of described 3rd insulated gate bipolar transistor, the negative pole of described 3rd diode is with described
The colelctor electrode of the 3rd insulated gate bipolar transistor connects；
The positive pole of described electric capacity is connected with the colelctor electrode of described first insulated gate bipolar transistor, described electric capacity
Negative pole be connected with the colelctor electrode of described 3rd insulated gate bipolar transistor.
Power model the most according to claim 1, it is characterised in that described first wholly-controled device with
Described second wholly-controled device reversely concatenates.
Power model the most according to claim 6, it is characterised in that described first wholly-controled device is
First insulated gate bipolar transistor, described second wholly-controled device is the second insulated gate bipolar transistor,
Described 3rd wholly-controled device is the 3rd insulated gate bipolar transistor；
The emitter stage of described first insulated gate bipolar transistor and described second insulated gate bipolar transistor
Emitter stage connects, the colelctor electrode of described second insulated gate bipolar transistor and described 3rd insulated gate bipolar
The colelctor electrode of transistor connects；
The positive pole of described first diode is connected with the emitter stage of described first insulated gate bipolar transistor, institute
The colelctor electrode of the negative pole and described first insulated gate bipolar transistor of stating the first diode is connected；Described second
The positive pole of diode is connected with the emitter stage of described second insulated gate bipolar transistor, described second diode
Negative pole be connected with the colelctor electrode of described second insulated gate bipolar transistor；The positive pole of described 3rd diode
Being connected with the emitter stage of described 3rd insulated gate bipolar transistor, the negative pole of described 3rd diode is with described
The colelctor electrode of the 3rd insulated gate bipolar transistor connects；
The positive pole of described electric capacity is connected with the colelctor electrode of described first insulated gate bipolar transistor, described electric capacity
Negative pole be connected with the emitter stage of described 3rd insulated gate bipolar transistor.
8. an inverter, it is characterised in that include first group of three change of current brachium pontis, second group of three change of current
Brachium pontis, first group of brachium pontis reactor, second group of brachium pontis reactor, three charging resistors, one group three be isolated
Switch and a chopper, the change of current brachium pontis in described first group of change of current brachium pontis and described second group of change of current brachium pontis
Bar number be three, the brachium pontis reactance in described first group of brachium pontis reactor and described second group of brachium pontis reactor
The number of device is three；
The positive terminal of three change of current brachium pontis in described first group of change of current brachium pontis is all connected to the first junction point, institute
The negative pole end stating three change of current brachium pontis in second group of change of current brachium pontis is all connected to the second junction point；
The negative pole end of three change of current brachium pontis in described first group of change of current brachium pontis and described first group of brachium pontis reactor
In one end of three brachium pontis reactors connect one to one, three converter bridges in described second group of change of current brachium pontis
In the positive terminal of arm and second group of brachium pontis reactor, one end of three brachium pontis reactors connects one to one, described
Three brachium pontis in the other end of three brachium pontis reactors and second group of brachium pontis reactor in first group of brachium pontis reactor
The other end of reactor connects one to one；
Another of the other end of described first group of three brachium pontis reactor and described second group of three brachium pontis reactor
Three junction points that end connects one to one connect one to one with the three-phase of described three-phase isolation switch, described
The three-phase of three-phase isolation switch and three described charging resistor one_to_one corresponding are in parallel；
Described chopper is connected between described first junction point and described second junction point；
Any one change of current brachium pontis in described first group of change of current brachium pontis and second group of change of current brachium pontis all includes concatenation
Several power models as claimed in any of claims 1 to 7 in one of claims, in previous power model
The junction point of one wholly-controled device and the second wholly-controled device and the 3rd wholly-controled device in later power model
It is connected with the junction point of described electric capacity, the 3rd wholly-controled device and described electricity in the power model of stem after concatenation
The junction point held as the positive terminal of described change of current brachium pontis, in the power model of afterbody the first wholly-controled device with
The junction point of the second wholly-controled device is as the negative pole end of described change of current brachium pontis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620447987.6U CN205657603U (en) | 2016-05-17 | 2016-05-17 | Power module and transverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620447987.6U CN205657603U (en) | 2016-05-17 | 2016-05-17 | Power module and transverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205657603U true CN205657603U (en) | 2016-10-19 |
Family
ID=57402357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620447987.6U Expired - Fee Related CN205657603U (en) | 2016-05-17 | 2016-05-17 | Power module and transverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205657603U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687477A (en) * | 2019-02-20 | 2019-04-26 | 山东大学 | Applied to the basic unit of chain type STATCOM, chain type STATCOM and method |
-
2016
- 2016-05-17 CN CN201620447987.6U patent/CN205657603U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687477A (en) * | 2019-02-20 | 2019-04-26 | 山东大学 | Applied to the basic unit of chain type STATCOM, chain type STATCOM and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105846704A (en) | Power module, converter, charging method thereof and direct current fault self-cleaning method | |
| CN106329899B (en) | Fault current inhibits damper topological circuit and its control method and transverter | |
| CN104578865B (en) | A kind of T-shaped fault-tolerant current transformer of three level four bridge legs and its control method | |
| CN104753043B (en) | Multi-level current converter with direct-current fault ride-through capability and working method | |
| CN105680409B (en) | A kind of bridge circuit, DC current break-up device and its control method | |
| CN107276045B (en) | A kind of mixed DC current limiting circuit breaker | |
| CN103236710B (en) | Adopt the THE UPFC of modular construction | |
| CN106452136A (en) | Multi-port power electronic converter for energy internet | |
| CN105634026B (en) | A kind of line commutation converter structure based on anti-parallel thyristor full-bridge submodule inverter | |
| Tang et al. | Managing zero sequence in voltage source converter | |
| CN102035398A (en) | Direct converter and system comprising such a direct converter | |
| CN106981980A (en) | A kind of full-bridge MMC starts control method and system | |
| CN107359644A (en) | A kind of microgrid interface topology apparatus | |
| CN106711999A (en) | Modulation wave reconstruction based MMC-STATCOM fault processing device | |
| CN104796025A (en) | Sub-module topological structure of modular multilevel converter | |
| CN205647264U (en) | Three level submodule pieces of MMC with direct current short -circuit current is from scavenging ability | |
| CN106787877B (en) | Antithesis unipolar voltage module chain and its mixed multi-level current transformer | |
| CN108900103A (en) | The converter power module and inverter for having DC Line Fault self-cleaning ability | |
| AU2019258117B2 (en) | Precharging of an intermediate circuit | |
| CN103326608B (en) | One seed module, facies unit, voltage-source type multilevel converter and control method | |
| CN106464134A (en) | Converter | |
| CN205657603U (en) | Power module and transverter | |
| CN103683327A (en) | Single-phase controllable series compensation device applied to low voltage ride through of fans | |
| CN107749615B (en) | It is a kind of based on the dc circuit breaker for sealing in capacitor and its DC Line Fault processing strategie | |
| CN206117540U (en) | Switch accurate Z source dc -to -ac converter of type high -gain that steps up |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161019 |