CN104883070B - Converter system and converter control method of multi-winding permanent magnet direct-drive generator - Google Patents
Converter system and converter control method of multi-winding permanent magnet direct-drive generator Download PDFInfo
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- CN104883070B CN104883070B CN201510210013.6A CN201510210013A CN104883070B CN 104883070 B CN104883070 B CN 104883070B CN 201510210013 A CN201510210013 A CN 201510210013A CN 104883070 B CN104883070 B CN 104883070B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000009466 transformation Effects 0.000 abstract 2
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000005672 electromagnetic field Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
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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 converter system and a converter control method of a multi-winding permanent magnet direct drive generator, wherein the converter system comprises: the machine side rectifier comprises a plurality of machine side rectifiers and a plurality of machine side rectifier controllers in one-to-one correspondence with the machine side rectifiers, wherein each machine side rectifier is connected with a set of windings, and the machine side rectifier controllers are used for carrying out switching control on the machine side rectifiers corresponding to the machine side rectifier controllers so that the switching frequency of the work of every two adjacent machine side rectifiers is different by a preset frequency interval. The current transformation system and the current transformation control method of the multi-winding permanent magnet direct-drive generator can reduce the mutual influence of magnetic field hinges generated by the current among the windings, thereby inhibiting the current distortion.
Description
Technical field
The present invention relates to converter system and the change of technical field of wind power, more particularly to a kind of Multiple coil permanent magnet direct-drive generator
Method of flow control.
Background technology
It is well known that permanent magnet direct-drive generator typically uses multiple secondary winding, it is an independent three-phase system often to cover winding
System.In the structure shown here, due between winding electric current can produce magnetic field hinge, magnetic field hinge influences each other so that between phase current mutually
Interference, and then cause the distortion between generator phase current, Fig. 1 is prior art Multiple coil permanent magnet direct-drive generator pusher side three-phase electricity
Waveform diagram is flowed, as shown in figure 1, being distorted between generator phase current.The distortion of phase current can also influence unsteady flow simultaneously
The control performance of system, occurs the problem of wind power generating set produces vibration when serious.
The content of the invention
The purpose of the embodiment of the present invention is that there is provided a kind of converter system of Multiple coil permanent magnet direct-drive generator and unsteady flow control
Method processed, can reduce influencing each other for current induced magnetic field hinge between winding, so as to suppress current distortion.
For achieving the above object, The embodiment provides a kind of unsteady flow of Multiple coil permanent magnet direct-drive generator
System, including：Multiple pusher side rectifiers and with the one-to-one multiple pusher side rectifier controllers of the multiple pusher side rectifier,
Each pusher side rectifier is connected with a set of winding, and the multiple pusher side rectifier controller is used for corresponding machine
Side rectifier carries out switch control so that the switching frequency of the adjacent pusher side rectifier work of each two differs predetermined frequency
Rate interval.
Preferably, the scope of the predetermined frequency interval is between 20 hertz to 500 hertz.
Preferably, the multiple pusher side rectifier uses common DC bus topological structure.
Preferably, the converter system also includes：The converter system includes multiple full power convertors, multiple described complete
Power converter is using topological structure in parallel, and each full power convertor includes net side wave filter, net side inverter, described
Pusher side rectifier and pusher side wave filter.
Preferably, the converter system also includes and the one-to-one net side inverter control of the multiple net side inverter
Device, one of net side circuit control device is as main inverter controller, and other net side circuit control devices are as from inverse
Become device controller, the main inverter controller is connected with the master controller of this wind power generating set, the main inverter control
Device is used to receiving the first torque signal that the master controller of described wind power generating set is sent, and by first torque signal
The second torque signal is equally assigned into, and second torque signal is sent to multiple described from circuit control device.
Preferably, the converter system also includes multiple pusher side breakers and multiple net side breakers, each full work(
The two ends of rate current transformer are connected with a pusher side breaker and a net side breaker respectively, each pusher side
The other end of breaker is connected with a set of winding of the Multiple coil permanent magnet direct-drive generator, each net side breaker
The other end is connected with power network.
Preferably, the converter system also includes net side breaker, net side wave filter, a multiple pusher side wave filters
And multiple pusher side breakers, one end of the net side breaker is connected with power network, the other end of the net side breaker with
The net side wave filter is connected, and one end of each pusher side breaker is a set of with the Multiple coil permanent magnet direct-drive generator
Winding is connected, and the other end of each pusher side breaker is connected with the pusher side wave filter.
Embodiments of the invention additionally provide a kind of Variable flow control method of Multiple coil permanent magnet direct-drive generator, converter system
Including：Multiple pusher side rectifiers and with the one-to-one multiple pusher side rectifier controllers of the multiple pusher side rectifier, each
The pusher side rectifier is connected with a set of winding, and the Variable flow control method includes：
Switch control is carried out to corresponding pusher side rectifier by the multiple pusher side rectifier controller so that every
The switching frequency of two adjacent pusher side rectifier work differs predetermined frequency interval.
Preferably, the scope of the predetermined frequency interval is between 20 hertz to 500 hertz.
Preferably, the converter system also includes：Multiple net side inverters and with a pair of the multiple net side inverter 1
The net side circuit control device answered, one of net side circuit control device is as main inverter controller, and other net sides are inverse
Become device controller as from circuit control device, the main inverter controller and the master controller of this wind power generating set to connect
Connect, the Variable flow control method also includes：
The main inverter controller receives the first torque signal that the master controller of described wind power generating set is sent,
And first torque signal is equally assigned into the second torque signal, and second torque signal is sent to multiple institutes
State from circuit control device.
The converter system and Variable flow control method of Multiple coil permanent magnet direct-drive generator provided in an embodiment of the present invention, Duo Geji
Side rectifier controller controls each self-corresponding pusher side rectifier so that the switch frequency of the adjacent pusher side rectifier work of each two
Rate differs predetermined frequency interval, influencing each other for current induced magnetic field hinge between winding can be reduced, so as to inhibit electric current
Distortion, and improve the control performance of system.
Brief description of the drawings
Fig. 1 is prior art Multiple coil permanent magnet direct-drive generator pusher side three-phase current waveform diagram；
Fig. 2 is the structural representation of the converter system of the Multiple coil permanent magnet direct-drive generator of the embodiment of the present invention one；
Fig. 3 is the structural representation of the converter system of the Multiple coil permanent magnet direct-drive generator of the embodiment of the present invention two；
Fig. 4 is the structural representation of the converter system of the Multiple coil permanent magnet direct-drive generator of the embodiment of the present invention three；
Fig. 5 is differed after predetermined frequency interval for the switching frequency that the use pusher side rectifier of the embodiment of the present invention three works
Pusher side three-phase current waveform diagram.
Embodiment
Converter system to Multiple coil permanent magnet direct-drive generator of the embodiment of the present invention and Variable flow control side below in conjunction with the accompanying drawings
Method is described in detail.
In actual applications, in general converter system is included except main circuit (is respectively rectification circuit, inverter circuit and filter
Wave circuit) outside, also need the control circuit for being adjusted and controlling to main circuit.In embodiments of the present invention, converter system bag
Include pusher side wave filter, pusher side rectifier, pusher side rectifier controller, net side inverter, net side circuit control device and net side
Wave filter.
Embodiment one
Fig. 2 is the structural representation of the converter system of the Multiple coil permanent magnet direct-drive generator of the embodiment of the present invention one, such as Fig. 2
Shown, converter system includes：Multiple pusher side rectifiers 101 and with the one-to-one multiple pusher sides of multiple pusher side rectifiers 101
Rectifier controller 102, each pusher side rectifier 101 is connected with a set of winding of Multiple coil permanent magnet direct-drive generator, multiple
Pusher side rectifier controller 102 carries out switch control to corresponding pusher side rectifier 101 so that the adjacent pusher side of each two
The switching frequency that rectifier 102 works differs predetermined frequency interval.
Specifically, as an example it is assumed that there is n pusher side rectifier, and with n one-to-one n, pusher side rectifier
Pusher side rectifier controller, predetermined frequency interval is 100 hertz, and first pusher side rectifier controller is to corresponding machine
Side rectifier carries out switch control, and the switching frequency for making its work is k hertz, then remaining n-1 pusher side rectifier control
Device also carries out switch control to each self-corresponding pusher side rectifier respectively so that the switching frequency of n-1 pusher side rectifier work
Respectively k+100, k+200, until k+100*n.
The converter system of the Multiple coil permanent magnet direct-drive generator of the embodiment of the present invention, passes through multiple pusher side rectifier controllers
Switch control is carried out to corresponding pusher side rectifier, so that the switching frequency of multiple pusher side rectifiers work is with predetermined frequency
Stagger at rate interval so that the electromagnetic field that electric current is produced between winding will not be coupled, and then reduce hinge mutual shadow in magnetic field between winding
Ring, it is suppressed that current distortion.
Embodiment two
Fig. 3 is the structural representation of the converter system of the Multiple coil permanent magnet direct-drive generator of the embodiment of the present invention two, such as Fig. 3
Shown, converter system includes：Multiple pusher side rectifiers 101 and with the one-to-one multiple pusher sides of multiple pusher side rectifiers 101
Rectifier controller 102, multiple net side inverters 203, multiple net side wave filters 204 and multiple pusher side wave filters 205, Quan Gong
Rate current transformer includes：Net side inverter 203, net side wave filter 204, pusher side rectifier 101 and pusher side wave filter 205, also
It is to include multiple full power convertors in converter system, and this multiple full power convertor uses topology knot in parallel
Structure.In the present embodiment, full power convertor includes net side wave filter, net side inverter, the pusher side rectifier and pusher side filter
Ripple device.In general, in actual applications, except net side inverter, net side wave filter, pusher side rectifier and pusher side wave filter group
Into outside the major loop of full power convertor, full power convertor can also include control loop, that is, pusher side rectifier is controlled
Device and net side circuit control device.
It should be noted that multiple pusher side rectifier controllers 102 are switched to corresponding pusher side rectifier 101
Control so that the switching frequency that the adjacent pusher side rectifier 102 of each two works differs predetermined frequency interval.In addition, pusher side
Wave filter can be Du/Dt wave filters, and Du/Dt wave filters can play the higher hamonic wave filtered out on carrier wave, decay interference signal etc.
Effect.Net side wave filter can be LCL filter, net side inverter using series connection LCL filter be more beneficial for inverter compared with
High-quality grid current is obtained under low switching frequency.
Preferably, the scope of predetermined frequency interval can be between 20 hertz to 500 hertz.
Further, Multiple coil permanent magnet direct-drive generator includes master controller, and converter system can also include and multiple nets
The one-to-one net side circuit control device 208 of side inverter 203, one of net side circuit control device is used as main inverter
Controller, other net side circuit control devices are as from circuit control device, and main inverter controller is used to receive main control
The first torque signal that device is sent, and the first torque signal is equally assigned into the second torque signal, and the second moment of torsion is believed
Number send to multiple from circuit control device.Specifically, it should be noted that the first torque signal, which is master controller, is sent to master
The torque value of circuit control device, main inverter controller is just by of the torque value received divided by net side circuit control device
Number, that is, torque value is averaged as the second torque signal, and the second torque signal is sent to from inverter control
Device.
Further, converter system can also include：Multiple pusher side breakers 206 and multiple net side breakers 207, often
The two ends of individual full power convertor are connected with a pusher side breaker 206 and a net side breaker 207 respectively, each pusher side
The other end of breaker 206 is connected with a set of winding of Multiple coil permanent magnet direct-drive generator, each net side breaker 207 it is another
One end is connected with power network.
The converter system of the Multiple coil permanent magnet direct-drive generator of the embodiment of the present invention, has the following technical effect that：
On the one hand, switch control is carried out to corresponding pusher side rectifier by multiple pusher side rectifier controllers, with
The switching frequency of multiple pusher side rectifier work is set to stagger with predetermined frequency interval so that the electromagnetic field that electric current is produced between winding
It will not couple, magnetic field hinge influences each other between reducing winding, so as to inhibit current distortion；
On the other hand, multiple full power convertors can simplify the design of current transformer using topological structure in parallel so that become
The design standard of device is flowed, i.e., capacity extension can be achieved by the current transformer parallel connection of several standards；
On the other hand, it regard one in multiple net side circuit control devices as main inverter controller, other conducts
From circuit control device, the torque signal that master controller is sent is received by main inverter controller, and the torque signal is averaged
Distribute to multiple from circuit control device, so as to improve the control performance of system, prevent wind power generating set from producing vibration etc.
The generation of problem；
Another further aspect, adds pusher side breaker, and net between pusher side wave filter and Multiple coil permanent magnet direct-drive generator
Side filter is with adding net side breaker before power network, so that when the failure situations such as a current transformer or generator windings hair
When raw, failure current transformer or generator windings can be cut off, it is ensured that the normal operation of generating set and converter system.
Embodiment three
Fig. 4 is the structural representation of the converter system of the Multiple coil permanent magnet direct-drive generator of the embodiment of the present invention three, such as Fig. 4
Shown, converter system includes：Multiple pusher side rectifiers 101 and the one-to-one multiple pusher side rectifications of multiple pusher side rectifiers 101
Device controller 102, net side breaker 208, net side wave filter 204, net side inverter 203, the filter of multiple pusher sides
Ripple device 205 and multiple pusher side breakers 206, wherein, one end of net side breaker 207 is connected with power network, net side breaker
207 other end is connected with net side wave filter 204, and one end and the Multiple coil permanent magnet direct-drive of each pusher side breaker 206 generate electricity
A set of winding of machine is connected, and the other end of each pusher side breaker 206 is connected with pusher side wave filter 205.
It should be noted that this multiple pusher side rectifier 101 uses common DC bus topological structure.Multiple pusher side rectifiers
Controller 102 carries out switch control to corresponding pusher side rectifier 101 so that the adjacent pusher side rectifier 102 of each two
The switching frequency of work differs predetermined frequency interval.
The converter system of the Multiple coil permanent magnet direct-drive generator of the embodiment of the present invention, passes through multiple pusher side rectifier controllers
Switch control is carried out to corresponding pusher side rectifier, so that the switching frequency of multiple pusher side rectifiers work is with predetermined frequency
Stagger at rate interval so that the electromagnetic field that electric current is produced between winding will not be coupled, and then reduce hinge mutual shadow in magnetic field between winding
Ring, it is suppressed that current distortion.In addition, pusher side breaker is added in pusher side wave filter and Multiple coil permanent magnet direct-drive generator, and
Net side breaker is added between net side wave filter and power network, event can be cut off in generator windings or net side device failure
Hinder circuit, it is ensured that the normal operation of generating set and converter system.
Example IV
Multiple coil permanent magnet direct-drive generator can perform the Variable flow control side in the converter system described in previous embodiment one
Method, converter system includes：Multiple pusher side rectifiers and controlled with the one-to-one multiple pusher side rectifiers of multiple pusher side rectifiers
Device, each pusher side rectifier is connected with a set of winding, and the Variable flow control method includes：
Switch control is carried out to corresponding pusher side rectifier by multiple pusher side rectifier controllers so that each two
The switching frequency of adjacent pusher side rectifier work differs predetermined frequency interval.
In the present embodiment, Fig. 5 is pre- for the switching frequency difference that the use pusher side rectifier of the embodiment of the present invention three works
Pusher side three-phase current waveform diagram after fixed frequency interval, reference picture 5, with prior art Multiple coil permanent magnet direct-drive in Fig. 1
Generator pusher side three-phase current waveform is compared, and corresponding pusher side rectifier is entered by each pusher side rectifier controller
Row switch control, differs predetermined frequency interval, largely by the switching frequency of the adjacent pusher side rectifier work of each two
On the effect of suppression is served to current distortion.
The Variable flow control method of the Multiple coil permanent magnet direct-drive generator of the embodiment of the present invention, multiple pusher side rectifier controllers
Switch control is carried out to corresponding pusher side rectifier, so that the switching frequency phase of the adjacent pusher side rectifier work of each two
The predetermined frequency interval of difference so that the electromagnetic field that electric current is produced between winding will not be coupled, and then reduce magnetic field hinge between winding
Influence each other, it is suppressed that current distortion.
Further, in order to preferably suppress current distortion, the scope of predetermined frequency interval can be at 20 hertz to 500 hertz
Between hereby.
Further, in order to improve the control performance of converter system, Multiple coil permanent magnet direct-drive generator includes master controller,
The converter system can also include：Multiple net side inverters and with the one-to-one net side inverter control of multiple net side inverters
Device, one of net side circuit control device is as main inverter controller, and other net side circuit control devices are as from inverse
Become device controller, the Variable flow control method can also include：
Main inverter controller receives the first torque signal that master controller is sent, and by the first torque signal mean allocation
For the second torque signal, and the second torque signal sent to multiple from circuit control device.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of converter system of Multiple coil permanent magnet direct-drive generator, it is characterised in that including：Multiple pusher side rectifiers and with institute
State the one-to-one multiple pusher side rectifier controllers of multiple pusher side rectifiers, each pusher side rectifier and a set of winding phase
Connection,
The multiple pusher side rectifier controller is used to carry out switch control to corresponding pusher side rectifier so that each two
The switching frequency of adjacent pusher side rectifier work differs predetermined frequency interval.
2. converter system according to claim 1, it is characterised in that the scope of the predetermined frequency interval is at 20 hertz
To between 500 hertz.
3. converter system according to claim 1, it is characterised in that the multiple pusher side rectifier uses common DC bus
Topological structure.
4. converter system according to claim 1, it is characterised in that the converter system includes multiple total power unsteady flows
Device, multiple full power convertors include net side wave filter, net using topological structure in parallel, each full power convertor
Side inverter, the pusher side rectifier and pusher side wave filter.
5. converter system according to claim 4, it is characterised in that the converter system also includes and the multiple net side
The one-to-one net side circuit control device of inverter, one of net side circuit control device as main inverter controller,
Other net side circuit control devices are as from circuit control device, the main inverter controller and this wind power generating set
Master controller is connected,
The main inverter controller is used to receive the first torque signal that the master controller of described wind power generating set is sent,
And first torque signal is equally assigned into the second torque signal, and second torque signal is sent to multiple institutes
State from circuit control device.
6. converter system according to claim 4, it is characterised in that the converter system also includes multiple pusher side breakers
With multiple net side breakers, the two ends of each full power convertor respectively with described in a pusher side breaker and one
Net side breaker is connected, each other end of the pusher side breaker and a set of of the Multiple coil permanent magnet direct-drive generator around
Group is connected, and the other end of each net side breaker is connected with power network.
7. converter system according to claim 3, it is characterised in that the converter system also includes a net side open circuit
Device, net side wave filter, multiple pusher side wave filters and multiple pusher side breakers, one end of the net side breaker and power network
It is connected, the other end of the net side breaker is connected with the net side wave filter, one end of each pusher side breaker
It is connected with a set of winding of the Multiple coil permanent magnet direct-drive generator, the other end and the machine of each pusher side breaker
Side filter is connected.
8. a kind of Variable flow control method of Multiple coil permanent magnet direct-drive generator, it is characterised in that converter system includes：Multiple pusher sides
Rectifier and with the one-to-one multiple pusher side rectifier controllers of the multiple pusher side rectifier, each pusher side rectifier
It is connected with a set of winding, the Variable flow control method includes：
Switch control is carried out to corresponding pusher side rectifier by the multiple pusher side rectifier controller so that each two
The switching frequency of adjacent pusher side rectifier work differs predetermined frequency interval.
9. Variable flow control method according to claim 8, it is characterised in that the scope of the predetermined frequency interval is 20
Hertz between 500 hertz.
10. Variable flow control method according to claim 8, it is characterised in that the converter system also includes：Multiple net sides
Inverter and with the one-to-one net side circuit control device of the multiple net side inverter, one of net side inverter control
Device is as main inverter controller, and other net side circuit control devices are as from circuit control device, the main inverter control
Device processed is connected with the master controller of this wind power generating set, and the Variable flow control method also includes：
The main inverter controller receives the first torque signal that the master controller of described wind power generating set is sent, and will
First torque signal is equally assigned into the second torque signal, and by second torque signal send to it is multiple it is described from
Circuit control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510210013.6A CN104883070B (en) | 2015-04-29 | 2015-04-29 | Converter system and converter control method of multi-winding permanent magnet direct-drive generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510210013.6A CN104883070B (en) | 2015-04-29 | 2015-04-29 | Converter system and converter control method of multi-winding permanent magnet direct-drive generator |
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| Publication Number | Publication Date |
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| CN104883070B true CN104883070B (en) | 2017-08-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1084700A (en) * | 1996-09-06 | 1998-03-31 | Shinko Electric Co Ltd | Generator |
| CN101106279A (en) * | 2007-06-19 | 2008-01-16 | 华南理工大学 | Merged network and power adjustment system for direct drive permanent magnetic synchronization generator and its method |
| CN101154887A (en) * | 2007-10-11 | 2008-04-02 | 天津大学 | Wind power generation power conversion device of direct-driving type permanent magnet synchronous motor |
| LT2010036A (en) * | 2010-04-29 | 2011-11-25 | Kauno technologijos universitetas, , | Method of electric dualism and device for converting of stochastic energy |
-
2015
- 2015-04-29 CN CN201510210013.6A patent/CN104883070B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1084700A (en) * | 1996-09-06 | 1998-03-31 | Shinko Electric Co Ltd | Generator |
| CN101106279A (en) * | 2007-06-19 | 2008-01-16 | 华南理工大学 | Merged network and power adjustment system for direct drive permanent magnetic synchronization generator and its method |
| CN101154887A (en) * | 2007-10-11 | 2008-04-02 | 天津大学 | Wind power generation power conversion device of direct-driving type permanent magnet synchronous motor |
| LT2010036A (en) * | 2010-04-29 | 2011-11-25 | Kauno technologijos universitetas, , | Method of electric dualism and device for converting of stochastic energy |
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| CN104883070A (en) | 2015-09-02 |
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