CN106992727A - A kind of position control method of double feedback electric engine - Google Patents
A kind of position control method of double feedback electric engine Download PDFInfo
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- CN106992727A CN106992727A CN201710193131.XA CN201710193131A CN106992727A CN 106992727 A CN106992727 A CN 106992727A CN 201710193131 A CN201710193131 A CN 201710193131A CN 106992727 A CN106992727 A CN 106992727A
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- double feedback
- electric engine
- feedback electric
- axles
- position control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/007—Control circuits for doubly fed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
Abstract
The present invention discloses a kind of position control method of double feedback electric engine, applies in double feedback electric engine system, and double feedback electric engine system includes double feedback electric engine, grid side converter, machine-side converter and dc-link capacitance, and the position control method of the double feedback electric engine includes：Using grid side converter by the stator short circuit of double feedback electric engine, or machine-side converter is utilized by the rotor short circuit of double feedback electric engine；In the stator short circuit of double feedback electric engine, the position control of double feedback electric engine is realized based on machine-side converter；In the rotor short circuit of double feedback electric engine, the position control of double feedback electric engine is realized based on grid side converter.
Description
Technical field
The present invention relates to technical field of wind power generation, the position of wheel hub/generator of especially a kind of double feedback electric engine is controlled
Method, is a kind of position control method of wheel hub/generator based on double-feed current transformer in particular.
Background technology
As clean energy resource installed capacity gradually expands, double-fed generator is widely used in wind-power electricity generation.Wind turbines exist
Multiple occasions such as installation, maintenance need wheel hub/generator turning to some position, and conventional method is manual rotation's wheel at present
Hub/generator, visual observation is turned to behind target location to wheel hub/generator and stopped operating.There is positioning precision not in this method
Sufficient the problem of, it may be necessary to adjust repeatedly, difficulty is big when wind speed is very fast, or even can not complete positioning, while artificial operation is present
Higher risk.
The content of the invention
Therefore, for it is above-mentioned the problem of, the present invention proposes a kind of position control method of double feedback electric engine, for existing wind
There is provided a kind of wheel hub/hair based on current transformer for the problem of positioning precision that group of motors wheel hub/generator localization method is present is not enough
Motor position control method, realizes that it is automatically positioned, without adjusting repeatedly, particularly with wind speed it is very fast when can also be rapidly completed it is fixed
Position, and the potential risk that exists during artificial operation can be prevented, so as to solve the deficiency of prior art.
In order to solve the above-mentioned technical problem, the present invention uses the thinking to be, based on current transformer realization to wind-powered machine unit hub/
The position control of generator, double feedback electric engine stator short circuit is realized first with grid side converter, or real using machine-side converter
Existing double fed electric machine rotor short circuit；When realizing double feedback electric engine stator short circuit using grid side converter, based on machine-side converter and its
Control system realizes the position control of double feedback electric engine；When realizing double fed electric machine rotor short circuit using machine-side converter, based on net
Side converter and its control system realize the position control of double feedback electric engine.
Specifically, the technical solution adopted in the present invention is, a kind of position control method of double feedback electric engine applies to double-fed
In electric system, the double feedback electric engine system includes double feedback electric engine, grid side converter, machine-side converter and dc-link capacitance, double
Generating aid has a stator and rotor, and one end of grid side converter connects the first end of dc-link capacitance, grid side converter it is another
One end connects the stator of power network and double feedback electric engine；Second end of dc-link capacitance connects one end of machine-side converter, and pusher side becomes
The rotor connection of the other end connection double feedback electric engine of parallel operation；The position control method of double feedback electric engine includes：Utilize grid side converter
By the stator short circuit of double feedback electric engine, or machine-side converter is utilized by the rotor short circuit of double feedback electric engine；In the stator of double feedback electric engine
During short circuit, the position control of double feedback electric engine is realized based on machine-side converter；In the rotor short circuit of double feedback electric engine, become based on net side
Parallel operation realizes the position control of double feedback electric engine.
Further, above-mentioned utilization grid side converter is by the stator short circuit of double feedback electric engine, or utilizes machine-side converter will
Also include before the rotor short circuit of double feedback electric engine：Disconnect power network switch.Further, also wrapped after the disconnection power network switch
Include：Give dc-link capacitance charging.
It is by while opening bridge arm on grid side converter three-phase using grid side converter by the stator short circuit of double feedback electric engine
Or lower bridge arm switching tube realizes stator short circuit；It is by while opening using machine-side converter by the rotor short circuit of double feedback electric engine
Bridge arm or lower bridge arm switching tube realize rotor short circuit on logical machine-side converter three-phase.
Wherein, the position control of double feedback electric engine, including following process are realized based on machine-side converter：Using positional information,
Rotary speed information and detection obtain voltage, current signal control machine-side converter output realize double feedback electric engine position control
System.Positional information therein and rotary speed information can be obtained using code-disc detection, can also be obtained by calculating.Specifically, it includes
Following process：
Code-disc detects the rotor-position of double feedback electric engine, and rotor-position and default rotor target position meter according to detection
After calculation der Geschwindigkeitkreis set-point is obtained by position control regulation；
Code-disc measures the rotating speed of double feedback electric engine, and determines electric current loop q according to the rotating speed of der Geschwindigkeitkreis set-point and double feedback electric engine
Axle gives, and calculating acquisition electric current loop d axles by formula gives；The electric current loop d axles are given to be obtained by below equation：Wherein,For rotor flux,For d axle rotor fluxs, LmFor rotor mutual inductance；isdFor d axle stator currents；
The rotor current of double feedback electric engine is detected, electric current loop d axles feedback is obtained by coordinate transform and electric current loop q axles feed back,
And fed back according to electric current loop q axles are given with q axles, the reference voltage of q axles is determined by current regulator, is given according to electric current loop d axles
Fixed and d axles feedback, d axle reference voltages are determined by current regulator；And
The reference voltage of q axles and d axles reference voltage are transformed to inverter control signal by coordinate, double feedback electric engine according to
Inverter control signal and DC bus-bar voltage driving machine-side converter driving double fed electric machine rotor rotate to target location.
The position control of double feedback electric engine, including following process are realized based on grid side converter：Detect what is obtained using code-disc
Positional information, rotary speed information and detection obtain voltage, current signal control grid side converter output realize double feedback electric engine
Position control.Specifically, it includes following process：
Code-disc detects the position of stator of double feedback electric engine, is calculated according to the position of stator of detection and default stator target location
Afterwards der Geschwindigkeitkreis set-point is obtained by position control regulation；
Code-disc measures the rotating speed of double feedback electric engine, and electric current loop q axles are determined according to the rotating speed of der Geschwindigkeitkreis set-point and double feedback electric engine
It is given, acquisition electric current loop d axles are calculated by formula and given；Wherein, the electric current loop d axles are given is obtained by below equation：Wherein,For rotor flux,For d axle rotor fluxs, LmFor rotor mutual inductance；isdFor d axle stator currents；
The stator current of double feedback electric engine is detected, electric current loop d axles feedback is obtained by coordinate transform and electric current loop q axles feed back,
And fed back according to electric current loop q axles are given with q axles, the reference voltage of q axles is determined by current regulator, is given according to electric current loop d axles
Fixed and d axles feedback, d axle reference voltages are determined by current regulator；
The reference voltage of q axles and d axles reference voltage are transformed to inverter control signal by coordinate, double feedback electric engine according to
Inverter control signal and DC bus-bar voltage driving grid side converter driving double feedback electric engine stator rotate to target location.
The position control method of the double feedback electric engine of the present invention is designed based on existing doubly-fed generation system, with existing skill
Art is compared, with low cost, it is easy to operate without increasing hardware device, only software upgrading.In addition, the method for the present invention need not change
Become existing doubly-fed generation system topology, it is easy to accomplish, it is reliable and stable；Its control algolithm fast automatic can realize that double-fed is sent out
Electric system position is controlled, and has the advantages that efficiency high, security are good, practical.The method that the present invention is provided can realize profit
With the rotation of the rotation driving wheel hub of the rotor of double feedback electric engine, manpower is saved, the working strength of attendant is reduced.
Brief description of the drawings
Fig. 1 is double feedback electric engine position control block diagram of the invention；
Fig. 2 is the double feedback electric engine position control method topological diagram in embodiment 1 using grid side converter shorted stator；
Fig. 3 a is while open the schematic diagram that bridge arm on net side module three-phase realizes stator short circuit；
Fig. 3 b is while open the schematic diagram that bridge arm under net side module three-phase realizes stator short circuit；
Fig. 4 is the double feedback electric engine position control method topological diagram in embodiment 2 using pusher side module short circuit rotor；
Fig. 5 a is while open the schematic diagram that bridge arm on pusher side module three-phase realizes rotor short circuit；
Fig. 5 b is while open the schematic diagram that bridge arm under pusher side module three-phase realizes rotor short circuit；
Fig. 6 be embodiment 3 in doubly-fed generation system topological structure.
Embodiment
In conjunction with the drawings and specific embodiments, the present invention is further described.
The problems existed for existing wind-powered machine unit hub/generator localization method are based on unsteady flow there is provided one kind
The wheel hub of device/generator position control method, realizes that it is automatically positioned.This method is based on current transformer and realized to Wind turbines wheel
The position control of hub/generator.Specifically, above method step is as follows：S1：Double feedback electric engine stator is realized using grid side converter
Short circuit realizes double fed electric machine rotor or stator short circuit using machine-side converter；S2：It is double when being realized using grid side converter
When feeding machine stator short circuit, the position control of double feedback electric engine is realized based on machine-side converter and its control system；When utilizing pusher side
When converter realizes double fed electric machine rotor short circuit, the position control of double feedback electric engine is realized based on grid side converter and its control system
System.Specific control program is as follows.Initially set up double feedback electric engine flux linkage equations：
Wherein,For d axle stator magnetic linkages,For q axle stator magnetic linkages；For d axle rotor fluxs,For q axle rotor magnetic
Chain；LsFor stator inductance, LrFor inductor rotor, LmFor rotor mutual inductance；isdFor d axle stator currents, isqFor q axle stator currents；
irdFor d axle rotor currents, irqFor q axle rotor currents.
Rotor current stator current can represent and (during shorted stator, then represent stator current with rotor current)：
Set up double feedback electric engine voltage equation as follows：
Wherein, usdFor d axle stator voltages, usqFor q axle stator voltages；urdFor d axle rotor voltages, urqFor q axles rotor electricity
Pressure；RsFor stator resistance, RrFor rotor resistance；ω1For synchronous angular frequency, ωsFor slippage angular frequency；P is differential operator.
Due to by double fed electric machine rotor short circuit, therefore voltage equation can be write as (if shorted stator, stator voltage is
0)：
Double feedback electric engine electromagnetic torque equation is as follows：
Wherein, TeFor electromagnetic torque, npFor motor number of pole-pairs.
Formula (1) is substituted into formula (4), rotor voltage equation is represented by：
Dq coordinate system d direction of principal axis is overlapped with rotor flux direction, then
Formula (7) is substituted into formula (5), formula (6), motor magnetic linkage and torque equation are represented by：
Result above realizes the decoupling of double fed electric machine rotor magnetic linkage and electromagnetic torque, while slippage angular frequencysCan table
It is shown as：
Synchronous angular velocity ω1=ωr+ωs, field orientation angle, θ1For：
θ1=∫ ω1Dt=∫ (ωr+ωs)dt (11)
Double feedback electric engine position control flow is as follows：Make θ*The target location of the rotor of double feedback electric engine is represented, position ring is used as
It is given, the rotor position of the double feedback electric engine of actual measurement is used as the feedback of position ring, θ and θ*By position control PR after computing
ω is exported after effect*, ω*It is given as der Geschwindigkeitkreis；The rotational speed omega of code-disc actual measurement double feedback electric engine is fed back as der Geschwindigkeitkreis, ω and ω*
Exported after being acted on after computing through speed regulator SRIt is given as electric current loop q axles, calculated and obtained by formula (8)Make
It is given for electric current loop d axles.Double feedback electric engine DFIG detects stator current i in real timesa、isb、iscThrough 3s/2r coordinate transforms, (3 is mutually static
Conversion of the coordinate to 2 cordic phase rotators) obtain i afterwardssdAnd isq, isdFed back as electric current loop d axles, isqIt is anti-as electric current loop q axles
Feedback, isdWithU is obtained after being acted on after computing through current regulator CRgdref, isqWithAfter being acted on after computing through current regulator CR
Obtain Ugqref, UgdrefAnd UgqrefInverter control signal, inverter control signal are can be used as after 3s/2r coordinate transforms
Double feedback electric engine is conveyed to after pwm pulse width modulated, double feedback electric engine carries out position control according to the signal received.
Double feedback electric engine position control block diagram is shown in Figure 1, θ in Fig. 1*The target location of the rotor of double feedback electric engine is represented,
As the given of position ring, the rotor-position of code-disc actual measurement double feedback electric engine is made as the feedback of position ring through position control PR
With rear output ω*Given as der Geschwindigkeitkreis, code-disc actual measurement generator speed is fed back as der Geschwindigkeitkreis, is acted on through speed regulator SR
After exportQ axles are given as electric current loop to give, and are calculated and obtained by formula (8)Electric current loop gives d axles and given.Detect stator current
isa、isb、iscI is obtained after 3s/2r coordinate transformssd、isqRespectively as electric current loop d, q axle feedback, through current regulator CR
U is obtained after effectgdref、Ugqref, inverter control signal is used as after 3s/2r coordinate transforms.
Embodiment 1
The present embodiment is specifically described exemplified by being realized that the position of double feedback electric engine is controlled based on grid side converter.Referring to Fig. 2,
Double feedback electric engine system generally comprises double feedback electric engine, grid side converter, net side inductance, machine-side converter, pusher side inductance, is pre-charged back
Road, dc-link capacitance, power network switch Q and grid-connected switch Kp.Wherein, grid side converter, machine-side converter, dc bus electricity
Hold and constitute current transformer.Grid side converter is connected by net side inductance with power network GRID；Machine-side converter by pusher side inductance with it is double
The rotor connection of generating aid, the stator of double feedback electric engine is connected by grid-connected switch Kp with power network GRID, grid side converter and pusher side
Converter is connected by dc-link capacitance.Other double feedback electric engine system also includes current on line side, busbar voltage Vdc, rotor current
Ir, the detection of the signal such as code-disc rotating speed and control system.Net side inductance typically realizes that pusher side inductance uses dudt using inductance
Inductance is realized.The present invention is only improved precharging circuit, and general precharging circuit is arranged on after breaker, and of the invention
Preliminary filling electrical circuit be connected between power network and breaker；In addition, general preliminary filling electrical circuit only does soft start use, to bus capacitor
Cut off immediately after charging, and preliminary filling electrical circuit of the present invention needs preliminary filling electrical circuit persistently to provide energy for inverter, therefore
Inverter is persistently devoted oneself to work when working.The difference of 2 preliminary filling electrical circuits of the above and prior art cause can not possibly with this hair
The solution of the present invention is realized in the hardware topology of bright different preliminary filling electrical circuit.
In other embodiments of the present invention, pusher side inductance and net side inductance can also be omitted.
Specifically, double feedback electric engine position control method comprises the following steps：
S1：Disconnect power network switch Q；
S2：Close grid-connected switch Kp；
S3：Charged by preliminary filling electrical circuit to dc-link capacitance, energy is provided for follow-up machine-side converter driving；
In the present embodiment, preliminary filling electrical circuit is persistently devoted oneself to work in the machine-side converter course of work.
In other embodiments of the invention, preliminary filling electrical circuit can also be substituted by uninterrupted voltage and be filled to dc-link capacitance
Electricity.In addition, if the residual voltage on dc-link capacitance drives pusher side to convert enough, then the preliminary filling electrical circuit can also be not required to
To be charged to dc-link capacitance.
S4：It is while opening bridge arm on grid side converter three-phase using grid side converter short circuit double feedback electric engine stator winding
Or bridge arm switching tube under grid side converter is opened simultaneously；Fig. 3 a are opening bridge arm on net side module three-phase realizes that stator is short simultaneously
Connect, Fig. 3 b are opening bridge arm under net side module three-phase realizes stator short circuit simultaneously；
S5：Detect that voltage, current signal that obtained positional information, rotary speed information and detection are obtained are controlled using code-disc
Machine-side converter realizes the position control of double feedback electric engine, specifically includes following steps：
S5.1：The target location of the rotor of given double feedback electric engine, as the given of position ring, code-disc actual measurement double feedback electric engine
Rotor-position exports ω as the feedback of position ring after being acted on through position control PR*It is given as der Geschwindigkeitkreis；
S5.2：Code-disc actual measurement generator speed is fed back as der Geschwindigkeitkreis, is exported after being acted on through speed regulator SRAs
Electric current loop gives q axles and given, and is calculated and obtained by formula (8)Electric current loop gives d axles and given；
S5.3：Detect rotor current ira、irb、ircI is obtained after 3s/2r coordinate transformsrd、irqRespectively as electric current loop
D, q axle are fed back, and U is obtained after being acted on through current regulator CRrdref、Urqref；
S5.4：Urdref、UrqrefThrough 3s/2r coordinate transforms, machine-side converter is controlled with reference to busbar voltage.
In other embodiments of the invention, positional information and rotary speed information can also be obtained by calculating, it is not necessary to pass through code
Disk is detected.
The present embodiment realizes stator short circuit by grid side converter, short circuit is not only realized automatically, and need not change existing
Topological structure, you can wind wheel is accurately parked in a certain position automatically, with improvement cost it is cheap the characteristics of.
Embodiment 2
Doubly-fed generation system topology shown in Fig. 4 is identical with Fig. 2, and its double feedback electric engine position control method is specifically wrapped
Include：
S1：Disconnect power network switch Q；
S2：Close grid-connected switch Kp；
S3：Charged by preliminary filling electrical circuit to dc-link capacitance, energy is provided for follow-up grid side converter driving；
In the present embodiment, preliminary filling electrical circuit is persistently devoted oneself to work in the grid side converter course of work.
S4：It is while opening bridge arm on machine-side converter three-phase using machine-side converter short circuit double fed electric machine rotor winding
Or bridge arm switching tube under machine-side converter is opened simultaneously；Fig. 5 a are opening bridge arm on pusher side module three-phase realizes that rotor is short simultaneously
The schematic diagram connect；Fig. 5 b is while open the schematic diagram that bridge arm under pusher side module three-phase realizes rotor short circuit；
S5：Detect that voltage, current signal that obtained positional information, rotary speed information and detection are obtained are controlled using code-disc
Machine-side converter realizes the position control of double feedback electric engine, specifically includes following steps：
S5.1：The target location of the rotor of given double feedback electric engine, as the given of position ring, code-disc actual measurement double feedback electric engine
Rotor-position exports ω as the feedback of position ring after being acted on through position control PR*It is given as der Geschwindigkeitkreis；
S5.2：Code-disc actual measurement generator speed is fed back as der Geschwindigkeitkreis, is exported after being acted on through speed regulator SRAs
Electric current loop gives q axles and given, and is calculated and obtained by formula (8)Electric current loop gives d axles and given；
S5.3：Detect stator current isa、isb、isc, and obtain i after 3s/2r coordinate transformssd、isqRespectively as electricity
Ring d, q axle feedback are flowed, U is obtained after being acted on through current regulator CRgdref、Ugqref；
S5.4：Ugdref、UgqrefThrough 3s/2r coordinate transforms, grid side converter is controlled with reference to busbar voltage.
Embodiment 3
The doubly-fed generation system topology of the present embodiment is as shown in fig. 6, its double feedback electric engine position control method is specifically wrapped
Include：
S1：Disconnect power network switch Q；
In the present embodiment, circuit topology does not have grid-connected switch, and energy is provided using dc bus residual voltage or other power supplys.
Step S2 is identical with the step S4 of embodiment 1, and step S3 is identical with the step S5 of embodiment 1.Here repeat no more.
The present invention realizes that stator short circuit or machine-side converter realize rotor short circuit by grid side converter, realizes automatically short
Connect, without changing existing topological structure, and the work that the present invention need not be positioned manually, you can realize automatic by wind wheel
Accurately it is parked in a certain position.
Although specifically showing and describing the present invention with reference to preferred embodiment, those skilled in the art should be bright
In vain, do not departing from the spirit and scope of the present invention that appended claims are limited, in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (10)
1. a kind of position control method of double feedback electric engine, in double feedback electric engine system, the position controlling party of the double feedback electric engine
Method includes：
Using grid side converter by the stator short circuit of double feedback electric engine, or it is using machine-side converter that the rotor of double feedback electric engine is short
Connect；
In the stator short circuit of double feedback electric engine, the position control of double feedback electric engine is realized based on pusher side frequency converter；In double feedback electric engine
During rotor short circuit, the position control of double feedback electric engine is realized based on grid side converter.
2. the position control method of double feedback electric engine according to claim 1, it is characterised in that：The utilization grid side converter
To also it include before the rotor short circuit of double feedback electric engine by the stator short circuit of double feedback electric engine, or using machine-side converter：
Disconnect power network switch.
3. the position control method of double feedback electric engine according to claim 2, it is characterised in that：It is described disconnection power network switch it
Also include afterwards：
Give dc-link capacitance charging.
4. the position control method of the double feedback electric engine according to claims 1 to 3 any one, it is characterised in that：Utilize net
Side converter, by the stator short circuit of double feedback electric engine, is by being switched while opening bridge arm or lower bridge arm on grid side converter three-phase
Pipe realizes stator short circuit；It is by while opening machine-side converter three using machine-side converter by the rotor short circuit of double feedback electric engine
Bridge arm or lower bridge arm switching tube realize rotor short circuit in phase.
5. the position control method of the double feedback electric engine according to claims 1 to 3 any one, it is characterised in that：The base
The position control of double feedback electric engine is realized in machine-side converter, following process is specifically included：
Voltage, the current signal obtained using positional information, rotary speed information and detection controls the output of machine-side converter to realize
The position control of double feedback electric engine.
6. the position control method of double feedback electric engine according to claim 5, it is characterised in that：The utilization positional information,
Rotary speed information and detection obtain voltage, current signal control machine-side converter output realize double feedback electric engine position control
System, specifically includes following process：
After code-disc detects the rotor-position of double feedback electric engine, and rotor-position according to detection and default rotor target position are calculated
Der Geschwindigkeitkreis set-point is obtained by position control regulation；
Code-disc measure double feedback electric engine rotating speed, and according to the rotating speed of der Geschwindigkeitkreis set-point and double feedback electric engine determine electric current loop q axles to
It is fixed, acquisition electric current loop d axles are calculated by formula and given；
The rotor current of double feedback electric engine is detected, electric current loop d axles feedback is obtained by coordinate transform and electric current loop q axles feed back, and root
Fed back according to electric current loop q axles are given with q axles, the reference voltage of q axles is determined by current regulator, is given according to electric current loop d axles and d
Axle is fed back, and d axle reference voltages are determined by current regulator；And
The reference voltage of q axles and d axles reference voltage are transformed to inverter control signal by coordinate, double feedback electric engine is according to inversion
Device control signal and DC bus-bar voltage driving machine-side converter driving double fed electric machine rotor rotate to target location.
7. the position control method of double feedback electric engine according to claim 6, it is characterised in that：The electric current loop d axles give
It is to be obtained by below equation：Wherein,For rotor flux,For d axle rotor fluxs, LmIt is mutual for rotor
Sense；isdFor d axle stator currents.
8. the position control method of the double feedback electric engine according to claims 1 to 3 any one, it is characterised in that：The base
The position control of double feedback electric engine is realized in grid side converter, following process is specifically included：
Voltage, the current signal obtained using positional information, rotary speed information and detection controls the output of grid side converter to realize
The position control of double feedback electric engine.
9. the position control method of double feedback electric engine according to claim 8, it is characterised in that：The utilization positional information,
Rotary speed information and detection obtain voltage, current signal control grid side converter output realize double feedback electric engine position control
System, specifically includes following process：
Code-disc detects the position of stator of double feedback electric engine, is passed through after being calculated according to the position of stator of detection and default stator target location
Cross position control regulation and obtain der Geschwindigkeitkreis set-point；
Code-disc measures the rotating speed of double feedback electric engine, determines that electric current loop q axles give according to the rotating speed of der Geschwindigkeitkreis set-point and double feedback electric engine,
Acquisition electric current loop d axles are calculated by formula to give；
The stator current of double feedback electric engine is detected, electric current loop d axles feedback is obtained by coordinate transform and electric current loop q axles feed back, and root
Fed back according to electric current loop q axles are given with q axles, the reference voltage of q axles is determined by current regulator, is given according to electric current loop d axles and d
Axle is fed back, and d axle reference voltages are determined by current regulator；
The reference voltage of q axles and d axles reference voltage are transformed to inverter control signal by coordinate, double feedback electric engine is according to inversion
Device control signal and DC bus-bar voltage driving grid side converter driving double feedback electric engine stator rotate to target location.
10. the position control method of double feedback electric engine according to claim 9, it is characterised in that：The electric current loop d axles give
It is to be obtained by below equation：Wherein,For rotor flux,For d axle rotor fluxs, LmIt is mutual for rotor
Sense；isdFor d axle stator currents.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111594383A (en) * | 2020-05-29 | 2020-08-28 | 国电联合动力技术有限公司 | Large-megawatt double-fed wind turbine generator set reverse driving method and system |
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