CN108832659A - A kind of multi-modular converter and control method - Google Patents
A kind of multi-modular converter and control method Download PDFInfo
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- CN108832659A CN108832659A CN201810672674.4A CN201810672674A CN108832659A CN 108832659 A CN108832659 A CN 108832659A CN 201810672674 A CN201810672674 A CN 201810672674A CN 108832659 A CN108832659 A CN 108832659A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H02J3/386—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The embodiment of the invention provides a kind of multi-modular converter and control methods, the multi-modular converter includes frame circuit breaker and at least two current transformers, wherein, each current transformer includes alternating current net side, DC side, alternating current pusher side, first contactor and second contactor.The multi-modular converter provided in this programme individually controls the access state of each current transformer, improves the redundancy of system by the switch state of control first contactor, second contactor and third contactor.Meanwhile frame circuit breaker can be constantly in closed state, that is, reduce the disjunction number of frame circuit breaker, and then can extend the service life of frame circuit breaker.Except this, since the current transformer of multiple access systems is parallel with one another by third contactor, and then the circulation between current transformer is reduced.
Description
Technical field
The present invention relates to new energy motor control technology fields, and in particular to a kind of multi-modular converter and controlling party
Method.
Background technique
Current transformer is the alternating current of grid side to be commonly converted to direct current in electricity generation system, then direct current is converted to
The device of the alternating current of motor side comprising the semiconductor switch of multiple parallel connections, by the switch combination state of semiconductor switch,
Realize the conversion of above-mentioned AC-DC.Specifically, semiconductor switch can have switch function for IGBT, IGCT and IEGT etc.
The device of energy.
As the power requirement of electricity generation system is higher and higher, the exchange side of multiple current transformers is usually subjected to parallel connection, with full
The biggish power requirement of foot.However, multiple AC side of converter are directly carried out parallel connection, DC side is without parallel connection, to make to be
System has redundancy properties, and the exchange side of each current transformer is respectively provided with frame circuit breaker, is independently controlled, and cost input is larger,
If multiple current transformers share a frame circuit breaker, then do not have redundancy properties.Except this, the frame circuit breaker of multiple current transformers
Frequent disjunction causes reduced service life, and the circulation problem between multiple current transformers is also relatively prominent.
In order to reduce existing circulation between multiple current transformers, usually the exchange side of multiple current transformers, DC side all into
Row is in parallel, and synchronously control is arranged on software, and inhibits circulation control algolithm, with utmostly reduce multiple current transformers it
Between circulation.
However, it is found by the inventors that the mechanical life of frame circuit breaker and electrical endurance are limited, actually it is being incorporated into the power networks
In, it is desirable to reduce the off-grid number of current transformer reduces the action frequency of frame circuit breaker.
Therefore, how a kind of multi-modular converter is provided, not only can solve the circulation problem between current transformer but also frame can be extended
The service life of frame breaker is those skilled in the art's big technical problem urgently to be resolved.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of multi-modular converters, it both can solve and met redundancy sexual function and want
It asks, and can preferably solve the circulation problem between current transformer, and effectively extend the service life of frame circuit breaker.
To achieve the above object, the embodiment of the present invention provides the following technical solutions：
A kind of multi-modular converter, including frame circuit breaker and at least two current transformers, each current transformer include
Alternating current net side, DC side, alternating current pusher side, first contactor and second contactor；
One end phase that the alternating current net side of each current transformer passes through the first contactor and the frame circuit breaker
Even, the other end of the frame circuit breaker is connected with power grid；
The alternating current pusher side of each current transformer passes through the second contactor and power generation mechatronics；
It is parallel with one another that the DC side of multiple current transformers passes through third contactor.
Optionally, the alternating current pusher side of the current transformer is same with the generator by the second contactor
Winding terminal is connected.
Optionally, the alternating current pusher side of multiple current transformers by the second contactor respectively with the generator
Different winding terminals are connected.
Optionally, the current transformer further includes：The sub- current transformer of grid side and the sub- current transformer of motor side,
The sub- current transformer of grid side includes the first three-phase converter module, direct current crow bar unit and grid-connected filter unit；
The sub- current transformer of motor side includes the second three-phase converter module and filter；
First three-phase converter module, the direct current crow bar unit and second three-phase converter module are in parallel；
DC side of the both ends of the direct current crow bar unit as the current transformer；
The midpoint of first three-phase converter module is connected with the input terminal of the grid-connected filter unit, the grid-connected filtering
Alternating current net side of the output end of unit as the current transformer；
The midpoint of second three-phase converter module is connected with the input terminal of the filter, the output end of the filter
Alternating current pusher side as the current transformer.
Optionally, the current transformer further includes：
With concatenated first fuse of the first contactor；
And/or
With concatenated second fuse of the second contactor；
And/or
With the concatenated third fuse of the third contactor.
A kind of control method, is applied to any one combinations of the above formula current transformer, and the control method includes:
First operating mode controls frame circuit breaker closure, controls the first contactor closure, controls described the
Two contactors disconnect, and the third contactor closure are controlled, so that the current transformer is in grid-connected standby mode；
Second operating mode controls frame circuit breaker closure, controls the first contactor closure, controls described the
Two contactors closure controls the third contactor closure, so that the current transformer is in grid-connected state；
Third operating mode controls frame circuit breaker closure, controls the first contactor and disconnects, and controls described the
Two contactors disconnect, and control the third contactor and disconnect, so that the current transformer is in shutdown status；
4th operating mode, controls frame circuit breaker closure, the first contactor of current transformer described in control section with
And second contactor disconnects, first contactor and the second contactor closure of current transformer described in control section, controls described the
Three contactors closure, so that the current transformer is in redundancy running state.
Optionally, further include：
The temperature for obtaining the current transformer of the first contactor closure, when the temperature is greater than the first preset value,
It controls the corresponding current transformer and is in the third operating mode.
Optionally, further include：
When the temperature is lower than the second preset value, controls the corresponding current transformer and be in the second operating mode.
Optionally, further include：
Obtain generated output given value to be tracked；
According to the generated output given value and the rated generation power of each current transformer, combined type unsteady flow is determined
The target of current transformer accesses quantity in device；
The current transformer for controlling the target access quantity is in second operating mode, controls other unsteady flows
Device is in the third operating mode.
Optionally, further include：
Obtain the malfunction of current transformer in the multi-modular converter；
It controls the current transformer to break down and is in the third operating mode, and send alarm.
A kind of fan converter, including any one combinations of the above formula current transformer.
Based on the above-mentioned technical proposal, the embodiment of the invention provides a kind of multi-modular converter, including frame circuit breaker with
And at least two current transformer, wherein each current transformer includes alternating current net side, DC side, alternating current pusher side, the first contact
Device and second contactor.Specifically, the alternating current net side of each current transformer passes through the first contactor and the frame
One end of frame breaker is connected, and the other end of the frame circuit breaker is connected with power grid.The alternating current generator of each current transformer
Side passes through the second contactor and power generation mechatronics.It is mutual that the DC side of multiple current transformers passes through third contactor
It is in parallel.As it can be seen that passing through control first contactor, second contactor and third in the multi-modular converter provided in this programme
The switch state of contactor individually controls the access state of each current transformer, improves the redundancy of system.At this point, frame is disconnected
Road device can be constantly in closed state, that is, reduce the disjunction number of frame circuit breaker, and then can extend frame circuit breaker
Service life.Except this, since the current transformer of multiple access systems is parallel with one another by third contactor, and then current transformer is reduced
Between circulation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of multi-modular converter provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another multi-modular converter provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another multi-modular converter provided in an embodiment of the present invention；
Fig. 4 is a kind of flow diagram of control method provided in an embodiment of the present invention；
Fig. 5 is a kind of another flow diagram of control method provided in an embodiment of the present invention；
Fig. 6 is a kind of another flow diagram of control method provided in an embodiment of the present invention；
Fig. 7 is a kind of another flow diagram of control method provided in an embodiment of the present invention；
Fig. 8 is a kind of another flow diagram of control method provided in an embodiment of the present invention.
Specific embodiment
Referring to Fig. 1, Fig. 1 is a kind of structural schematic diagram of multi-modular converter provided in an embodiment of the present invention, the combination
Formula current transformer includes frame circuit breaker 11 and at least two current transformers 12.Wherein, each current transformer 12 includes alternating current
Net side 121, DC side 122, alternating current pusher side 123, first contactor 124 and second contactor 125.
Specifically, the connection relationship of each device is in the multi-modular converter：
The grid side of each current transformer 12 exchanges defeated 121 outlet and passes through the first contactor 124 and the frame
One end of breaker 11 is connected, and the other end of the frame circuit breaker 11 is connected with power grid；
The alternating current pusher side 123 of each current transformer 12 is electrically connected by the second contactor 125 with generator 13；
The DC side 122 of multiple current transformers 12 is parallel with one another by third contactor 126.
In conjunction with above-mentioned connection relationship it is found that multi-modular converter provided in this embodiment can be by controlling first contactor
And second contactor closure, to realize that the current transformer accesses entire electricity generation system.When the first contactor of control current transformer is closed
When conjunction, being isolated for the current transformer and power grid may be implemented, it is seen then that the system redundancy of multi-modular converter provided in this embodiment
It is higher.Also, this programme realizes the access and disconnection of current transformer by first contactor and second contactor, is not necessarily to controller chassis
Frame breaker actuation, and then reduce the frequency of use of frame circuit breaker, improve the service life of frame circuit breaker.
It should be noted that the function of former frame circuit breaker cutting current transformer is shared in the present embodiment using contactor, and
Contactor, which is not compromised by on-off times, causes device lifetime to reduce.
Except this, multi-modular converter provided in this embodiment is also connect the DC side output end of each current transformer by third
Tentaculum is in parallel, so that the current transformer after parallel connection will not generate the circulation between current transformer.
On the basis of the above embodiments, in multi-modular converter provided in this embodiment, the alternating current pusher side of current transformer
Can be has phase difference to be connected with motor, can also be and is connected with motor without phase difference.
Specifically, thering is phase difference to be connected with motor as shown in Fig. 2, the alternating current pusher side of current transformer can be, wherein multiple
By the second contactor, winding terminals different from the generator are connected the alternating current pusher side of the current transformer respectively.
As shown in figure 3, the alternating current pusher side of current transformer can be and be connected with motor without phase difference, wherein the current transformer
Alternating current pusher side be connected with the same winding terminal of the generator by the second contactor.
Specifically, current transformer provided in this embodiment can also include：The sub- current transformer of grid side and the sub- unsteady flow of motor side
Device.
Wherein, the sub- current transformer of the grid side includes the first three-phase converter module, direct current crow bar unit and grid-connected filtering
Unit；
The sub- current transformer of motor side includes the second three-phase converter module and filter；
First three-phase converter module, the direct current crow bar unit and second three-phase converter module are in parallel；
DC side of the both ends of the direct current crow bar unit as the current transformer；
The midpoint of first three-phase converter module is connected with the input terminal of the grid-connected filter unit, the grid-connected filtering
Alternating current net side of the output end of unit as the current transformer；
The midpoint of second three-phase converter module is connected with the input terminal of the filter, the output end of the filter
Alternating current pusher side as the current transformer.
Except this, current transformer further includes in multi-modular converter provided in this embodiment：
With concatenated first fuse of the first contactor；
And/or
With concatenated second fuse of the second contactor；
And/or
With the concatenated third fuse of the third contactor.
Schematically, multi-modular converter provided in this embodiment is composed in parallel by 1~n of current transformer.1~n's of current transformer
DC side passes through DC fuse FUSE01~FUSE0n respectively and D.C. contactor K01~K0n is attached；1~n's of current transformer
Grid side is flowed to total grid-connected frame open circuit by A.C. contactor K11~Kn1 and exchange fuse FUSE11~FUSE1n respectively
Device QF is connect using exchange fuse FUSE with power grid；The motor side of 1~n of current transformer by A.C. contactor K12~Kn2 and
Exchange fuse FUSE12~FUSEn2 be connected respectively to 1~n of generator set winding output total busbar connector, or respectively with generator
1~n set winding connection.
In conjunction with the hardware configuration of upper multi-modular converter, the present embodiment additionally provides a kind of applied to said combination formula unsteady flow
The control method of device, as shown in figure 4, the control method includes:
First operating mode, S41, the control frame circuit breaker closure, controls the first contactor closure, controls institute
Second contactor disconnection is stated, the third contactor closure is controlled, so that the current transformer is in grid-connected standby mode；
Second operating mode, S42, the control frame circuit breaker closure, controls the first contactor closure, controls institute
Second contactor closure is stated, the third contactor closure is controlled, so that the current transformer is in grid-connected state；
Third operating mode, S43, the control frame circuit breaker closure, controls the first contactor and disconnects, control institute
Second contactor disconnection is stated, the third contactor is controlled and disconnects, so that the current transformer is in shutdown status；
4th operating mode, S44, the control frame circuit breaker are closed, the first contact of current transformer described in control section
Device and second contactor disconnect, and first contactor and the second contactor closure of current transformer described in control section control institute
Third contactor closure is stated, so that the current transformer is in redundancy running state.
As it can be seen that in the multi-modular converter provided in this programme, pass through control first contactor and second contactor
Switch state individually controls the access state of each current transformer, improves the redundancy of system.At this point, frame circuit breaker can be with
It is constantly in closed state, that is, reduces the disjunction number of frame circuit breaker, and then the service life of frame circuit breaker can be extended.
It is again parallel with one another by third contactor due to the current transformer of multiple access systems, and then reduce the circulation between current transformer.
Except this, as shown in figure 5, the control method can also include：
S51, the temperature for obtaining the current transformer that the first contactor is closed, when the temperature is greater than the first preset value
When, it controls the corresponding current transformer and is in the third operating mode.
On the basis of the above embodiments, as shown in fig. 6, the control method can also include：
S61, when the temperature is lower than the second preset value, control the corresponding current transformer and be in the second operating mode.
And as shown in fig. 7, the control method can also include：
S71, generated output given value to be tracked is obtained；
S72, according to the generated output given value and the rated generation power of each current transformer, determine combined type
The target of current transformer accesses quantity in current transformer；
The current transformer that S73, the control target access quantity is in second operating mode, controls described in other
Current transformer is in the third operating mode.
Except this, control method provided in this embodiment, as shown in figure 8, can also include：
S81, the malfunction for obtaining current transformer in the multi-modular converter；
The current transformer that S82, control are broken down is in the third operating mode, and sends alarm.
That is, in actual operation, multi-modular converter provided in this embodiment can keep grid side frame circuit breaker
Under QF "on" position, by A.C. contactor K11, K21, Kn1 separating brake, realize the incision of branch road current transformer i cut out (i=1,
2,···,n)。
Specifically, multi-modular converter provided in this embodiment can be applied in multiple technologies field, such as wind-powered electricity generation field.
Now by taking above-mentioned multi-modular converter is applied in wind-powered electricity generation field as an example, the course of work of multi-modular converter is illustrated.
It, can be according to the wind speed and generated output size of wind power prediction, the master control system of Wind turbines in wind-powered electricity generation field
It is handed down to the generated output given value that multi-modular converter needs to track, the communication controller of multi-modular converter is according to wind power
The generated output data of prediction the incision of 1~n of current transformer and are cut out in control combination formula current transformer.
That is, the present embodiment can also provide a kind of fan converter, including any one combinations of the above formula current transformer.
Except this, multi-modular converter provided in this embodiment can also be according to the operating temperature of detection current transformer itself, such as
The temperature of the core devices such as IGBT, when the temperature detected is greater than set temperature, control 1~n's of current transformer is switched in and out.
Further, multi-modular converter provided in this embodiment can also detect whether current transformer itself occurs event
Barrier, when detecting that current transformer breaks down, the controller of multi-modular converter is automatically by the current transformer of corresponding failure branch road
It is cut out, is not involved in operation, realize the multistage drop volume operation of current transformer.
From the hardware structure and control flow of multi-modular converter provided in an embodiment of the present invention, can easily obtain
This multi-modular converter has the advantages that out：
1. making full use of the parallel-connection structure inside current transformer, the on-line tuning of current transformer single-machine capacity is realized, shorten unsteady flow
Relative operation time of the device under small-power reduces from power consumption, promotes unit entirety generating efficiency, meanwhile, when certain branch unsteady flow
It when device failure, can be arranged by simple software, cut drop volume operational mode, to improve unit generation amount, reduce abandonment
Rate；
2. the current transformer quantity to put into operation can be reduced when generation current is smaller, to raise current transformer real work
Electric current evades the larger problem of low current stage harmonic components accounting；
3. predicting the average operating temperature of current transformer, and the incision for controlling 1~n of current transformer is cut according to prediction generated output
Out, the operating temperature of the core devices such as IGBT is kept to stablize in lesser range, to promote the work longevity of semiconductor devices
Life；
4. in the process of running, the action frequency of grid-connected end frame circuit breaker Q F is substantially reduced, and grid-side converter 1~
The incision of n, which is cut out, only relies on contactor K11~Kn1 realization control, has ensured the electrical endurance of frame circuit breaker QF；
5. can be adapted for the access of multi-winding generator, as central point is electrical without being electrically connected, having between more set windings
Connection, it is cover between windings without phase shift, have phase shift etc. more；
6. the parallel arrangement using three phase rectifier, inversion as a unit, the design of DC side commutation circuit is simple, tight
It gathers, and in normal course of operation, it is theoretically in parallel straight between multiple groups current transformer if two current transformers select identical hardware
Current stress is not subject on stream contactor and DC fuse.Even and if actually due to the inconsistency of hardware circuit, this programme
The electric current born on middle D.C. contactor and DC fuse is smaller.
To sum up, the embodiment of the invention provides a kind of multi-modular converters, including frame circuit breaker and at least two changes
Flow device, wherein each current transformer includes alternating current net side, DC side, alternating current pusher side, first contactor and second connects
Tentaculum.Specifically, the alternating current net side of each current transformer passes through the first contactor and the one of the frame circuit breaker
End is connected, and the other end of the frame circuit breaker is connected with power grid.The alternating current pusher side of each current transformer passes through described the
Two contactors and power generation mechatronics.It is parallel with one another that the DC side of multiple current transformers passes through third contactor.As it can be seen that this
In the multi-modular converter provided in scheme, by the switch state of control first contactor and second contactor, individually control
The access state for making each current transformer improves the redundancy of system.At this point, frame circuit breaker can be constantly in closed form
State, that is, reduce the disjunction number of frame circuit breaker, and then can extend the service life of frame circuit breaker.Except this, due to multiple
The current transformer of access system is parallel with one another by third contactor, and then reduces the circulation between current transformer.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (11)
1. a kind of multi-modular converter, which is characterized in that including frame circuit breaker and at least two current transformers, each change
Flowing device includes alternating current net side, DC side, alternating current pusher side, first contactor and second contactor；
The alternating current net side of each current transformer is connected by the first contactor with one end of the frame circuit breaker, institute
The other end for stating frame circuit breaker is connected with power grid；
The alternating current pusher side of each current transformer passes through the second contactor and power generation mechatronics；
It is parallel with one another that the DC side of multiple current transformers passes through third contactor.
2. multi-modular converter according to claim 1, which is characterized in that the alternating current pusher side of the current transformer passes through institute
Second contactor is stated to be connected with the same winding terminal of the generator.
3. multi-modular converter according to claim 1, which is characterized in that the alternating current pusher side of multiple current transformers is logical
Crossing the second contactor, winding terminals different from the generator are connected respectively.
4. multi-modular converter according to claim 1, which is characterized in that the current transformer further includes：Grid side becomes
Device and the sub- current transformer of motor side are flowed,
The sub- current transformer of grid side includes the first three-phase converter module, direct current crow bar unit and grid-connected filter unit；
The sub- current transformer of motor side includes the second three-phase converter module and filter；
First three-phase converter module, the direct current crow bar unit and second three-phase converter module are in parallel；
DC side of the both ends of the direct current crow bar unit as the current transformer；
The midpoint of first three-phase converter module is connected with the input terminal of the grid-connected filter unit, the grid-connected filter unit
Alternating current net side of the output end as the current transformer；
The midpoint of second three-phase converter module is connected with the input terminal of the filter, the output end conduct of the filter
The alternating current pusher side of the current transformer.
5. multi-modular converter according to claim 1, which is characterized in that the current transformer further includes：
With concatenated first fuse of the first contactor；
And/or
With concatenated second fuse of the second contactor；
And/or
With the concatenated third fuse of the third contactor.
6. a kind of control method, which is characterized in that it is applied to multi-modular converter according to any one of claims 1 to 5,
The control method includes:
First operating mode controls the frame circuit breaker closure, controls the first contactor closure, and control described second connects
Tentaculum disconnects, and the third contactor closure is controlled, so that the current transformer is in grid-connected standby mode；
Second operating mode controls the frame circuit breaker closure, controls the first contactor closure, and control described second connects
Tentaculum closure controls the third contactor closure, so that the current transformer is in grid-connected state；
Third operating mode controls the frame circuit breaker closure, controls the first contactor and disconnect, control described second connects
Tentaculum disconnects, and controls the third contactor and disconnects, so that the current transformer is in shutdown status；
4th operating mode, controls frame circuit breaker closure, the first contactor of current transformer described in control section and the
Two contactors disconnect, and first contactor and the second contactor closure of current transformer described in control section control the third and connects
Tentaculum closure, so that the current transformer is in redundancy running state.
7. control method according to claim 6, which is characterized in that further include：
The temperature for obtaining the current transformer of the first contactor closure, when the temperature is greater than the first preset value, control
The corresponding current transformer is in the third operating mode.
8. control method according to claim 7, which is characterized in that further include：
When the temperature is lower than the second preset value, controls the corresponding current transformer and be in the second operating mode.
9. control method according to claim 6, which is characterized in that further include：
Obtain generated output given value to be tracked；
According to the generated output given value and the rated generation power of each current transformer, determine in multi-modular converter
The target of current transformer accesses quantity；
The current transformer for controlling the target access quantity is in second operating mode, controls at other described current transformers
In the third operating mode.
10. control method according to claim 6, which is characterized in that further include：
Obtain the malfunction of current transformer in the multi-modular converter；
It controls the current transformer to break down and is in the third operating mode, and send alarm.
11. a kind of fan converter, which is characterized in that including the combined type unsteady flow as described in any one of claim 1-5
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810672674.4A CN108832659B (en) | 2018-06-26 | 2018-06-26 | Combined converter and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810672674.4A CN108832659B (en) | 2018-06-26 | 2018-06-26 | Combined converter and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111835031A (en) * | 2020-07-24 | 2020-10-27 | 中国船舶重工集团海装风电股份有限公司 | Wind generating set converter network side circuit breaker and machine side switch control strategy |
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| CN101013817A (en) * | 2007-02-07 | 2007-08-08 | 哈尔滨九洲电气股份有限公司 | Full power combination converter for megawatt wind power generation |
| CN201418024Y (en) * | 2009-07-03 | 2010-03-03 | 中国人民解放军海军工程大学 | Half-bridge power module and back to back type current transformer constituted by the half-bridge power module |
| CN205986189U (en) * | 2016-08-31 | 2017-02-22 | 许继电气股份有限公司 | Take centralized virtual synchrodyne of array of photovoltaic cells large capacity |
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| CN101013817A (en) * | 2007-02-07 | 2007-08-08 | 哈尔滨九洲电气股份有限公司 | Full power combination converter for megawatt wind power generation |
| CN201418024Y (en) * | 2009-07-03 | 2010-03-03 | 中国人民解放军海军工程大学 | Half-bridge power module and back to back type current transformer constituted by the half-bridge power module |
| CN205986189U (en) * | 2016-08-31 | 2017-02-22 | 许继电气股份有限公司 | Take centralized virtual synchrodyne of array of photovoltaic cells large capacity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111835031A (en) * | 2020-07-24 | 2020-10-27 | 中国船舶重工集团海装风电股份有限公司 | Wind generating set converter network side circuit breaker and machine side switch control strategy |
| CN111835031B (en) * | 2020-07-24 | 2024-02-27 | 中国船舶重工集团海装风电股份有限公司 | Wind generating set converter network side breaker and machine side switch control strategy |
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| CN108832659B (en) | 2021-04-13 |
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