CN106169896B - The controller and rotor flux on-line amending method and apparatus of magneto alternator - Google Patents
The controller and rotor flux on-line amending method and apparatus of magneto alternator Download PDFInfo
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- CN106169896B CN106169896B CN201610552122.0A CN201610552122A CN106169896B CN 106169896 B CN106169896 B CN 106169896B CN 201610552122 A CN201610552122 A CN 201610552122A CN 106169896 B CN106169896 B CN 106169896B
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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
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
- H02P21/141—Flux estimation
Abstract
The controller and rotor flux on-line amending method and apparatus of magneto alternator provided by the invention, torque current transfer algorithm when according to maximum torque per ampere control are calculated based on stator current orientationCoordinate systemThe stator current given value i of axiss *With power-factor angle α；Then the amplitude u of current stator phase voltage is calculated according to the stator three-phase alternating current acquired in real times；The average value u of three-phase voltage is calculated by the stator three-phase voltage collected in real timeav；If usWith uavBetween difference be more than predetermined threshold value M, then obtain revised rotor flux ψf(1)=K ψf；The above process is re-executed, until usWith uavBetween difference be less than M, finally realize the rotor flux on-line amending for magneto alternator；Complicated and cumbersome parameter identification is avoided, generator parameter is overcome and fluctuates influence to maximum torque per ampere control, realize the optimization of torque current and exciting current given value, effectively improve the stability of wind generator system operation.
Description
Technical field
The present invention relates to magneto alternator technical field, more particularly to the controller of a kind of magneto alternator and
Rotor flux on-line amending method and apparatus.
Background technology
In variable-speed constant-frequency wind power generation technology, direct-driving type wind power generation system directly drives multipole low speed forever using wind turbine
Magnetic-synchro generator (PMSM) generates electricity, and then will be connected to the grid by the transformed electric energy of full power convertor.Relative to double-fed
Asynchronous machine (DFIG) wind power system, direct-driving type wind power generation system is due to being omitted gear-box, and between generator and power grid
There is no a direct-coupling, thus with energy loss is few, maintenance cost is low, anti-power network fluctuation ability is strong, high reliability, from
And as one of most potential mainstream technology in variable-speed constant-frequency wind power generation technology.
Megawatt permanent magnetism synchronous directly drive system belongs to one kind in direct-driving type wind power generation system, is needed to the control of motor
It is controlled using maximum torque per ampere control and weak magnetic.This scheme controls nargin model to control generator output voltage in current transformer
It is target in enclosing, in turnover speed hereinafter, obtaining torque current by maximum torque per ampere control mode and exciting current is given
Value, to control the vector magnitude of stator current；More than turnover speed, in order to inhibit excessively high generator unit stator voltage, lead to
It overregulates stator current vector angle value and carrys out weak magnetic stable generator stator voltage, to turn according to actual generator is different
Speed realizes that torque capacity electric current than the good switching that vector controlled and weak magnetic control, ensures maximum power generation control.
But there are a significant drawbacks in above-mentioned traditional torque capacity electric current, that is, need dependence generator than vector controlled
Parameter.Since the rotor operating temperature of magneto alternator itself can increase in the process of running, and its physical parameter
If stator winding resistance value and rotor permanent magnet magnetic linkage amplitude are all the monotonic functions of temperature；Generator longtime running is special in wind field
Environment in, individual operating condition is different, and the magnetic field environment of each generator can also change；Factors above can to generate electricity
The parameter of machine will appear dynamic fluctuation.The fluctuation of generator parameter can cause to turn according to what generator parameter theoretical calculation obtained
Square electric current and exciting current given value are not optimal values, controlling electromagnetic torque accuracy decline, and the tracking that torque is issued to master control is inclined
Difference is excessive, and to will appear generator torque pulsation, generated output reduces, generated energy loss, and the steady of unit can be influenced when serious
Determine reliability service.
Invention content
The present invention provides a kind of controller and rotor flux on-line amending method and apparatus of magneto alternator, with solution
The problem of certainly needing to rely on the parameter of generator in the prior art.
In order to achieve the object, technical solution provided by the present application is as follows：
A kind of rotor flux on-line amending method of magneto alternator, including：
Torque-current transfer algorithm when according to maximum torque per ampere control, is calculated based on stator current orientation
'sCoordinate systemThe stator current given value i of axiss *With power-factor angle α；
According to based on stator current orientationCoordinate systemThe stator current given value i of axiss *With power-factor angle α,
The output current of magneto alternator is controlled by the current transformer of controlled current flow；
The stator three-phase alternating current I of the magneto alternator is acquired in real timeu、Iv、Iw；
According to based on rotor no-load electromotive force e0The angle of orientation, by stator three-phase alternating current Iu、Iv、IwBe converted to base
In rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq；
According to based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq, it is calculated
The amplitude u of current stator phase voltages；
The stator three-phase voltage U of the magneto alternator is acquired in real timeu、Uv、Uw；
According to stator three-phase voltage Uu、Uv、Uw, the average value u of three-phase voltage is calculatedav；
Judge the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference whether be more than it is default
Threshold value M；
If the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference be more than predetermined threshold value M,
It then will currently carry out the rotor flux ψ of the torque-current transfer algorithm calculatingfIt is multiplied by adjusted coefficient K, obtains revised turn
Sub- magnetic linkage ψf(1)=K ψf；
According to revised rotor flux ψf(1), above-mentioned steps are re-executed, until the amplitude u of current stator phase voltagesWith
The average value u of three-phase voltageavBetween difference be less than predetermined threshold value M.
Preferably, it is described according to maximum torque per ampere control when torque-current transfer algorithm, be calculated based on fixed
Electron current orientationCoordinate systemThe stator current given value i of axiss *Include with the step of power-factor angle α：
Torque-current transfer algorithm when according to maximum torque per ampere control, is calculated based on rotor unloaded Electro dynamic
Gesture e0The dq coordinate system d axis of orientation and the stator current given value i of q axis componentsd *And iq *；
According to stator current given value id *And iq *It is calculated based on stator current orientationCoordinate systemAxis is determined
Electron current given value is *And power-factor angle α.
Preferably, it is described according to maximum torque per ampere control when torque-current transfer algorithm, be calculated based on turn
Sub- no-load electromotive force e0The dq coordinate system d axis of orientation and the stator current given value i of q axis componentsd *And iq *Based on formula be：
It is described according to stator current given value id *And iq *It is calculated based on stator current orientationCoordinate systemAxis
Stator current given value is *Based on formula be：
It is described according to stator current given value id *And iq *It is calculated based on stator current orientationCoordinate systemAxis
Power-factor angle α based on formula be：
Wherein, δ is power angle, and φ is internal power factor angle, udAnd uqRespectively permanent magnet synchronous motor base in steady-state operation
In rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the stator voltage vector value of q axis components, LqFor quadrature axis inductance, LdFor
D-axis inductance, RsFor stator phase resistance, ωsFor synchronous angular rate.
Preferably, the basis is based on rotor no-load electromotive force e0The angle of orientation, by stator three-phase alternating current Iu、Iv、
IwIt is converted to and is based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iqThe step of include：
According to based on rotor no-load electromotive force e0The angle of orientation is converted by Clark transformation and Park, by stator three-phase
Alternating current Iu、Iv、IwIt is converted to and is based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、
iq。
Preferably, the basis is based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、
iq, the amplitude u of current stator phase voltage is calculatedsBased on formula be：
Wherein, udAnd uqRespectively permanent magnet synchronous motor is based on rotor no-load electromotive force e in steady-state operation0The dq of orientation
The stator voltage vector value of coordinate system d axis and q axis components, LqFor quadrature axis inductance, LdFor d-axis inductance, ωsFor synchronous electric angle speed
Degree.
Preferably, described according to stator three-phase voltage Uu、Uv、Uw, the average value u of three-phase voltage is calculatedavBased on
Formula is：
Preferably, if the amplitude u of the current stator phase voltagesWith the average value u of three-phase voltageavBetween difference be more than
Predetermined threshold value M then will currently carry out the rotor flux ψ of the torque-current transfer algorithm calculatingfIt is multiplied by adjusted coefficient K, is obtained
Revised rotor flux ψf(1)=K ψfThe step of include：
If us-uav＞ M then will currently carry out the rotor flux ψ of the torque-current transfer algorithm calculatingfIt is multiplied by amendment
COEFFICIENT K 1 (0.9<K1<1) revised rotor flux ψ, is obtainedf(1)=K1·ψf；
If uav-us＞ M then will currently carry out the rotor flux ψ of the torque-current transfer algorithm calculatingfIt is multiplied by amendment
COEFFICIENT K 2 (1<K2<1.1) revised rotor flux ψ, is obtainedf(1)=K2·ψf。
A kind of rotor flux on-line amending device of magneto alternator, including：
First computing unit, torque-current transfer algorithm when for according to maximum torque per ampere control, is calculated
Based on stator current orientationCoordinate systemThe stator current given value i of axiss *With power-factor angle α；
Control unit, for according to based on stator current orientationCoordinate systemThe stator current given value i of axiss *With
Power-factor angle α controls the output current of magneto alternator by the current transformer of controlled current flow；
First collecting unit, the stator three-phase alternating current I for acquiring the magneto alternator in real timeu、Iv、Iw；
Converting unit, for according to based on rotor no-load electromotive force e0The angle of orientation, by stator three-phase alternating current Iu、
Iv、IwIt is converted to and is based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq；
Second computing unit, for according to based on rotor no-load electromotive force e0The electric current of dq the coordinate system d axis and q axis of orientation
Component id、iq, the amplitude u of current stator phase voltage is calculateds；
Second collecting unit, the stator three-phase voltage U for acquiring the magneto alternator in real timeu、Uv、Uw；
Third computing unit, for according to stator three-phase voltage Uu、Uv、Uw, the average value u of three-phase voltage is calculatedav；
Judging unit, the amplitude u for judging current stator phase voltagesWith the average value u of three-phase voltageavBetween difference
Whether predetermined threshold value M is more than；
Amending unit, if the amplitude u for current stator phase voltagesWith the average value u of three-phase voltageavBetween difference it is big
In predetermined threshold value M, then the rotor flux ψ of the torque-current transfer algorithm calculating will be currently carried outfIt is multiplied by adjusted coefficient K, is obtained
To revised rotor flux ψf(1)=K ψf；
Output unit is used for revised rotor flux ψf(1)Output is re-executed to first computing unit
Step is stated, until the judging unit judges the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference
Value is less than predetermined threshold value M.
Preferably, first computing unit includes：
First computing module, torque-current transfer algorithm when for according to maximum torque per ampere control, is calculated
Based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the stator current given value i of q axis componentsd *And iq *；
Second computing module, for according to stator current given value id *And iq *It is calculated based on stator current orientationCoordinate systemThe stator current given value i of axiss *And power-factor angle α.
Preferably, the amending unit includes：
First correcting module, if being used for us-uav＞ M then will currently carry out turning for the torque-current transfer algorithm calculating
Sub- magnetic linkage ψfIt is multiplied by adjusted coefficient K 1 (0.9<K1<1) revised rotor flux ψ, is obtainedf(1)=K1·ψf；
Second correcting module, if being used for uav-us＞ M then will currently carry out turning for the torque-current transfer algorithm calculating
Sub- magnetic linkage ψfIt is multiplied by adjusted coefficient K 2 (1<K2<1.1) revised rotor flux ψ, is obtainedf(1)=K2·ψf。
A kind of controller of magneto alternator includes the rotor flux of any of the above-described magneto alternator
On-line amending device.
The rotor flux on-line amending method of the magneto alternator provided by the invention, first according to torque capacity
Torque-current transfer algorithm when electric current is than control, is calculated based on stator current orientationCoordinate systemAxis is determined
Electron current given value is *With power-factor angle α；Then same to permanent magnetism by the current transformer of controlled current flow according to above-mentioned result of calculation
The output current of step generator is controlled；Further according to based on rotor no-load electromotive force e0The angle of orientation, by what is acquired in real time
The stator three-phase alternating current I of the magneto alternatoru、Iv、IwIt is converted to and is based on rotor no-load electromotive force e0The dq of orientation
The current component i of coordinate system d axis and q axisd、iq, then the amplitude u of current stator phase voltage is calculateds；By acquiring in real time
The stator three-phase voltage U of the magneto alternator arrivedu、Uv、Uw, the average value u of three-phase voltage is calculatedav；If current
The amplitude u of stator phase voltagesWith the average value u of three-phase voltageavBetween difference be more than predetermined threshold value M, then will currently carry out institute
State the rotor flux ψ of torque-current transfer algorithm calculatingfIt is multiplied by adjusted coefficient K, obtains revised rotor flux ψf(1)=K
ψf；According to revised rotor flux ψf(1), above-mentioned steps are re-executed, until the amplitude u of current stator phase voltagesWith three-phase
The average value u of voltageavBetween difference be less than predetermined threshold value M, finally realize the rotor flux for magneto alternator
On-line amending；It avoids complicated and cumbersome parameter identification, calculating simply, are easy to software realization；Overcome generator parameter wave
The optimization of torque current and exciting current given value is realized in the dynamic influence to maximum torque per ampere control, is improved electromagnetism and is turned
The control accuracy of square avoids generator torque pulsation and generated energy loss, effectively improves the stability of wind generator system operation.
Description of the drawings
Technical solution in order to illustrate the embodiments of the present invention more clearly or in the prior art to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, it is only this that interior attached drawing, which is described below,
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the flow chart of the rotor flux on-line amending method of magneto alternator provided in an embodiment of the present invention；
Fig. 2 is the another of the rotor flux on-line amending method for the magneto alternator that another embodiment of the present invention provides
Flow chart；
Fig. 3 is the another of the rotor flux on-line amending method for the magneto alternator that another embodiment of the present invention provides
Flow chart；
Fig. 4 is the three dimensional vector diagram figure for the magneto alternator that another embodiment of the present invention provides；
Fig. 5 is the structure of the rotor flux on-line amending device for the magneto alternator that another embodiment of the present invention provides
Schematic diagram；
Fig. 6 is the another of the rotor flux on-line amending device for the magneto alternator that another embodiment of the present invention provides
Structural schematic diagram；
Fig. 7 is the another of the rotor flux on-line amending device for the magneto alternator that another embodiment of the present invention provides
Structural schematic diagram.
Specific implementation mode
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention
Specific implementation mode be described in detail.
The present invention provides a kind of rotor flux on-line amending method of magneto alternator, to solve to need in the prior art
The problem of relying on the parameter of generator.
Specifically, the rotor flux on-line amending method of the magneto alternator, as shown in Figure 1, including：
S101, according to maximum torque per ampere control when torque-current transfer algorithm, be calculated based on stator current
OrientationCoordinate systemThe stator current given value i of axiss *With power-factor angle α；
S102, basis are based on stator current orientationCoordinate systemThe stator current given value i of axiss *And power factor
Angle α controls the output current of magneto alternator by the current transformer of controlled current flow；
S103, the stator three-phase alternating current I for acquiring the magneto alternator in real timeu、Iv、Iw；
S104, basis are based on rotor no-load electromotive force e0The angle of orientation, by stator three-phase alternating current Iu、Iv、IwConversion
To be based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq；
S105, basis are based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq, meter
Calculation obtains the amplitude u of current stator phase voltages；
S106, the stator three-phase voltage U for acquiring the magneto alternator in real timeu、Uv、Uw；
S107, according to stator three-phase voltage Uu、Uv、Uw, the average value u of three-phase voltage is calculatedav；
S108, the amplitude u for judging current stator phase voltagesWith the average value u of three-phase voltageavBetween difference whether be more than
Predetermined threshold value M；
If the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference be more than predetermined threshold value M,
The rotor flux ψ for thening follow the steps S109, currently carrying out the torque-current transfer algorithm calculatingfAdjusted coefficient K is multiplied by,
Obtain revised rotor flux ψf(1)=K ψf；
According to revised rotor flux ψf(1), step S101 to S109 is re-executed, until current stator phase voltage
Amplitude usWith the average value u of three-phase voltageavBetween difference be less than predetermined threshold value M.
Wherein, step S101 to S107 belongs to calculating and detection-phase, mainly compares vector by using torque capacity electric current
Stator current given value and power-factor angle is calculated in control, carries out permanent magnetism by the current transformer of controlled current flow on this basis
The control of synchronous generator output current；Acquisition magneto alternator stator three-phase alternating current in real time, by coordinate transform
After dq axis components, the amplitude of current stator phase voltage is calculated；And the stator three-phase of the magneto alternator is acquired in real time
The average value of three-phase voltage is calculated in voltage.
Step S108 and S109 are belonging respectively to judge and correct the stage, by comparing the calculated value for judging stator phase voltage
(the amplitude u of current stator phase voltages) and real-time collection value (the average value u of three-phase voltageav) between difference whether be more than it is pre-
It, will when the difference between the calculated value and real-time collection value for judging stator phase voltage is more than predetermined threshold value M if threshold value M
Rotor magnetic linkage is multiplied by correction factor, then according to revised rotor flux, when passing through maximum torque per ampere control
Torque-current transfer algorithm calculates and updates stator current given value and power-factor angle in real time, on this basis according to
The output current of magneto alternator recalculate the amplitude u of current stator phase voltages, until the calculating of stator phase voltage
Difference between value and in real time collection value is less than predetermined threshold value M, to realize online real-time estimation and the amendment of rotor flux.
Just start to hold it is worth noting that step S106 and S107 are not necessarily limited after step S105 executes completion
Row, as long as obtaining the meter of stator phase voltage by step S101 to S105 and step S106 and S107 respectively before step S108
Calculation value (the amplitude u of current stator phase voltages) and real-time collection value (the average value u of three-phase voltageav), the application's
In protection domain；Fig. 1 is only a kind of example, the rotor flux on-line amending method of magneto alternator as shown in Figure 1,
Real-time collection value (the average value u of three-phase voltageav) more accurate.
The rotor flux on-line amending method of magneto alternator described in the present embodiment, by the above process, finally
Realize the rotor flux on-line amending for magneto alternator；It avoids complicated and cumbersome parameter identification, calculating are simple
It is single, it is easy to software realization；Overcome generator parameter and fluctuate influence to maximum torque per ampere control, realize torque current and
The optimization of exciting current given value improves the control accuracy of electromagnetic torque, avoids generator torque pulsation and generated energy loss,
Effectively improve the stability of wind generator system operation.
In another specific embodiment of the present invention, on the basis of Fig. 1, as shown in Fig. 2, step S101 includes：
S111, according to maximum torque per ampere control when torque-current transfer algorithm, be calculated based on rotor zero load
Electromotive force e0The dq coordinate system d axis of orientation and the stator current given value i of q axis componentsd *And iq *；
Torque-current transfer algorithm when preferably, according to maximum torque per ampere control is calculated based on rotor sky
Carry electromotive force e0The dq coordinate system d axis of orientation and the stator current given value i of q axis componentsd *And iq *Based on formula be：
Wherein, LqFor quadrature axis inductance, LdFor d-axis inductance；
S112, according to stator current given value id *And iq *It is calculated based on stator current orientationCoordinate system
The stator current given value i of axiss *And power-factor angle α.
Preferably, described according to stator current given value id *And iq *It is calculated based on stator current orientationIt sits
Mark systemThe stator current given value i of axiss *Based on formula be：
It is described according to stator current given value id *And iq *It is calculated based on stator current orientationCoordinate systemAxis
Power-factor angle α based on formula be：
Wherein, δ is power angle, and φ is internal power factor angle, udAnd uqRespectively permanent magnet synchronous motor base in steady-state operation
In rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the stator voltage vector value of q axis components, LqFor quadrature axis inductance, LdFor
D-axis inductance, RsFor stator phase resistance, ωsFor synchronous angular rate.
Preferably, step S104 includes：
According to based on rotor no-load electromotive force e0The angle of orientation is converted by Clark transformation and Park, by stator three-phase
Alternating current Iu、Iv、IwIt is converted to and is based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、
iq。
Preferably, according to based on rotor no-load electromotive force e in step S1050The electric current of dq the coordinate system d axis and q axis of orientation
Component id、iq, the amplitude u of current stator phase voltage is calculatedsBased on formula be：
Wherein, udAnd uqRespectively permanent magnet synchronous motor is based on rotor no-load electromotive force e in steady-state operation0The dq of orientation
The stator voltage vector value of coordinate system d axis and q axis components, LqFor quadrature axis inductance, LdFor d-axis inductance, ωsFor synchronous electric angle speed
Degree.
Preferably, according to stator three-phase voltage U in step S107u、Uv、Uw, the average value u of three-phase voltage is calculatedavInstitute
The formula of foundation is：
Fig. 4 be magneto alternator provided by the present invention rotor flux on-line amending method in permanent-magnet synchronous generate electricity
The three dimensional vector diagram of machine.Wherein, e0For the unloaded induced electromotive force that permanent magnet fundamental wave magnetic field generates, value is equal to ωsψf；E is forever
Magnet fundamental wave magnetic field generates armature induction electromotive force；δ is power angle, with usLag e counterclockwise0For just；α is power-factor angle, with
isU counterclockwisesAdvanced is just；φ is internal power factor angle, with isLag e counterclockwise0For just.
Using in Fig. 4 be based on rotor no-load electromotive force e0The dq synchronous rotating frames of orientation are reference frame, can be with
It obtains permanent magnet synchronous motor and is based on rotor no-load electromotive force e in steady-state operation0The dq coordinate system d axis of orientation and q axis components
Stator voltage vector value：
When the magneto alternator is claw pole type motor, then the calculation formula of stator current given value is：
It can be obtained according to Fig. 4, the internal power factor angle of stator current is：
When the magneto alternator is Non-Salient-Pole Motor, then the i in above formulad *=0, internal power factor angle φ=0.
According to the given value i of stator current d axis and q axis componentsd *、iq *, permanent magnet synchronous motor can be calculated in stable state
Rotor no-load electromotive force e is based on when operation0The dq coordinate system d axis of orientation and the stator voltage vector value u of q axis componentsd、uq, then electric
Acc power angle is：
By Fig. 4, the relationship between power-factor angle α and φ and power angle δ is：
α=δ-φ.
And then obtain the calculation formula of above-mentioned power-factor angle α.
In another specific embodiment of the present invention, on the basis of Fig. 1, as shown in figure 3, step S109 includes：
If us-uav＞ M, the rotor magnetic for thening follow the steps S191, currently carrying out the torque-current transfer algorithm calculating
Chain ψfIt is multiplied by adjusted coefficient K 1 (0.9<K1<1) revised rotor flux ψ, is obtainedf(1)=K1·ψf；
If uav-us＞ M, the rotor magnetic for thening follow the steps S192, currently carrying out the torque-current transfer algorithm calculating
Chain ψfIt is multiplied by adjusted coefficient K 2 (1<K2<1.1) revised rotor flux ψ, is obtainedf(1)=K2·ψf。
Work as us-uavWhen ＞ M, illustrate that stator virtual voltage is more relatively low compared with theoretical value, according to stator voltage and rotor
Monotonic increase relationship between magnetic linkage will should currently carry out the rotor flux ψ of the torque-current transfer algorithm calculatingfIt is multiplied by
Adjusted coefficient K 1 (0.9<K1<1) revised rotor flux ψ, is obtainedf(1)=K1·ψf；Work as uav-usWhen ＞ M, illustrate stator reality
Border voltage is more higher compared with theoretical value, will should currently carry out the rotor flux ψ of the torque-current transfer algorithm calculatingf
It is multiplied by adjusted coefficient K 2 (1<K2<1.1) revised rotor flux ψ, is obtainedf(1)=K2·ψf；
According to revised rotor flux ψf(1), return to step S101 to S108 re-starts stator current given value, work(
The calculating at rate factor angle, stator phase voltage amplitude and average value, as the amplitude u of current stator phase voltagesWith putting down for three-phase voltage
Mean value uavBetween difference still greater than predetermined threshold value M when, will currently carry out the rotor that the torque-current transfer algorithm calculates
Magnetic linkage is in ψf(1)On the basis of be multiplied by corresponding correction factor again, be in rotor flux correction value：
OrIn the case of, repetitive cycling N
Secondary execution step S101 to S108 (N=1,2,3 ...), until the amplitude u of current stator phase voltagesWith being averaged for three-phase voltage
Value uavBetween difference be less than predetermined threshold value M.
Another embodiment of the present invention additionally provides a kind of rotor flux on-line amending device of magneto alternator, such as schemes
Shown in 5, including：First computing unit 101, control unit 102, the first collecting unit 103, converting unit 104, second calculate single
First 105, second collecting unit 106, third computing unit 107, judging unit 108, amending unit 109 and output unit 110；Its
In：
Torque-current transfer algorithm when first computing unit 101 is for according to maximum torque per ampere control, calculates
To based on stator current orientationCoordinate systemThe stator current given value i of axiss *With power-factor angle α；
Control unit 102 is used for according to based on stator current orientationCoordinate systemThe stator current given value i of axiss *
With power-factor angle α, the output current of magneto alternator is controlled by the current transformer of controlled current flow；
First collecting unit 103 is used to acquire the stator three-phase alternating current I of the magneto alternator in real timeu、Iv、
Iw；
Converting unit 104 is used for according to based on rotor no-load electromotive force e0The angle of orientation, by stator three-phase alternating current
Iu、Iv、IwIt is converted to and is based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq；
Second computing unit 105 is used for according to based on rotor no-load electromotive force e0The electricity of dq the coordinate system d axis and q axis of orientation
Flow component id、iq, the amplitude u of current stator phase voltage is calculateds；
Second collecting unit 106 is used to acquire the stator three-phase voltage U of the magneto alternator in real timeu、Uv、Uw；
Third computing unit 107 is used for according to stator three-phase voltage Uu、Uv、Uw, the average value of three-phase voltage is calculated
uav；
Judging unit 108 is used to judge the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference
Whether value is more than predetermined threshold value M；
If amending unit 109 is used for the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference
More than predetermined threshold value M, then the rotor flux ψ of the torque-current transfer algorithm calculating will be currently carried outfAdjusted coefficient K is multiplied by,
Obtain revised rotor flux ψf(1)=K ψf；
Output unit 110 is used for revised rotor flux ψf(1)Output is re-executed to first computing unit
Above-mentioned steps, until the judging unit judges the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween
Difference is less than predetermined threshold value M.
The rotor flux on-line amending device of magneto alternator described in the present embodiment, by above-mentioned principle, finally
Realize the rotor flux on-line amending for magneto alternator；It avoids complicated and cumbersome parameter identification, calculating are simple
It is single, it is easy to software realization；Overcome generator parameter and fluctuate influence to maximum torque per ampere control, realize torque current and
The optimization of exciting current given value improves the control accuracy of electromagnetic torque, avoids generator torque pulsation and generated energy loss,
Effectively improve the stability of wind generator system operation.
Preferably, as shown in fig. 6, the first computing unit 101 includes：
First computing module 111, torque-current transfer algorithm when for according to maximum torque per ampere control calculate
It obtains being based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the stator current given value i of q axis componentsd *And iq *；
Second computing module 112, for according to stator current given value id *And iq *It is calculated and is based on stator current orientation
'sCoordinate systemThe stator current given value i of axiss *And power-factor angle α.
Preferably, as shown in fig. 7, amending unit 109 includes：
First correcting module 191, if being used for us-uav＞ M then will currently carry out the torque-current transfer algorithm and calculate
Rotor flux ψfIt is multiplied by adjusted coefficient K 1 (0.9<K1<1) revised rotor flux ψ, is obtainedf(1)=K1·ψf；
Second correcting module 192, if being used for uav-us＞ M then will currently carry out the torque-current transfer algorithm and calculate
Rotor flux ψfIt is multiplied by adjusted coefficient K 2 (1<K2<1.1) revised rotor flux ψ, is obtainedf(1)=K2·ψf。
Specific operation principle is same as the previously described embodiments, no longer repeats one by one herein.
Another embodiment of the present invention additionally provides a kind of controller of magneto alternator, including above-described embodiment is any
The rotor flux on-line amending device of the magneto alternator.
Specifically, the rotor flux on-line amending device of the magneto alternator, as shown in figure 5, including：First meter
Calculate unit 101, control unit 102, the first collecting unit 103, converting unit 104, the second computing unit 105, second acquisition list
Member 106, third computing unit 107, judging unit 108, amending unit 109 and output unit 110；Wherein：
Torque-current transfer algorithm when first computing unit 101 is for according to maximum torque per ampere control, calculates
To based on stator current orientationCoordinate systemThe stator current given value i of axiss *With power-factor angle α；
Control unit 102 is used for according to based on stator current orientationCoordinate systemThe stator current given value i of axiss *
With power-factor angle α, the output current of magneto alternator is controlled by the current transformer of controlled current flow；
First collecting unit 103 is used to acquire the stator three-phase alternating current I of the magneto alternator in real timeu、Iv、
Iw；
Converting unit 104 is used for according to based on rotor no-load electromotive force e0The angle of orientation, by stator three-phase alternating current
Iu、Iv、IwIt is converted to and is based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq；
Second computing unit 105 is used for according to based on rotor no-load electromotive force e0The electricity of dq the coordinate system d axis and q axis of orientation
Flow component id、iq, the amplitude u of current stator phase voltage is calculateds；
Second collecting unit 106 is used to acquire the stator three-phase voltage U of the magneto alternator in real timeu、Uv、Uw；
Third computing unit 107 is used for according to stator three-phase voltage Uu、Uv、Uw, the average value of three-phase voltage is calculated
uav；
Judging unit 108 is used to judge the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference
Whether value is more than predetermined threshold value M；
If amending unit 109 is used for the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference
More than predetermined threshold value M, then the rotor flux ψ of the torque-current transfer algorithm calculating will be currently carried outfAdjusted coefficient K is multiplied by,
Obtain revised rotor flux ψf(1)=K ψf；
Output unit 110 is used for revised rotor flux ψf(1)Output is re-executed to first computing unit
Above-mentioned steps, until the judging unit judges the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween
Difference is less than predetermined threshold value M.
Preferably, as shown in fig. 6, the first computing unit 101 includes：
First computing module 111, torque-current transfer algorithm when for according to maximum torque per ampere control calculate
It obtains being based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the stator current given value i of q axis componentsd *And iq *；
Second computing module 112, for according to stator current given value id *And iq *It is calculated and is based on stator current orientation
'sCoordinate systemThe stator current given value i of axiss *And power-factor angle α.
Preferably, as shown in fig. 7, amending unit 109 includes：
First correcting module 191, if being used for us-uav＞ M then will currently carry out the torque-current transfer algorithm and calculate
Rotor flux ψfIt is multiplied by adjusted coefficient K 1 (0.9<K1<1) revised rotor flux ψ, is obtainedf(1)=K1·ψf；
Second correcting module 192, if being used for uav-us＞ M then will currently carry out the torque-current transfer algorithm and calculate
Rotor flux ψfIt is multiplied by adjusted coefficient K 2 (1<K2<1.1) revised rotor flux ψ, is obtainedf(1)=K2·ψf。
Specific operation principle is same as the previously described embodiments, no longer repeats one by one herein.
Each embodiment is described by the way of progressive in the present invention, the highlights of each of the examples are with other realities
Apply the difference of example, just to refer each other for identical similar portion between each embodiment.For device disclosed in embodiment
Speech, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related place is referring to method part illustration
.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.Though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications, or is revised as the equivalent embodiment of equivalent variations.Therefore, it is every without departing from
The content of technical solution of the present invention, according to the technical essence of the invention any simple modification made to the above embodiment, equivalent
Variation and modification, still fall within technical solution of the present invention protection in the range of.
Claims (11)
1. a kind of rotor flux on-line amending method of magneto alternator, which is characterized in that including：
Torque-current transfer algorithm when according to maximum torque per ampere control, is calculated based on stator current orientationCoordinate systemThe stator current given value i of axiss *With power-factor angle α；
According to based on stator current orientationCoordinate systemThe stator current given value i of axiss *With power-factor angle α, pass through
The current transformer of controlled current flow controls the output current of magneto alternator；
The stator three-phase alternating current I of the magneto alternator is acquired in real timeu、Iv、Iw；
According to based on rotor no-load electromotive force e0The angle of orientation, by stator three-phase alternating current Iu、Iv、IwIt is converted to and is based on rotor
No-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq；
According to based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq, it is calculated current
The amplitude u of stator phase voltages；
The stator three-phase voltage U of the magneto alternator is acquired in real timeu、Uv、Uw；
According to stator three-phase voltage Uu、Uv、Uw, the average value u of three-phase voltage is calculatedav；
Judge the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference whether be more than predetermined threshold value
M；
If the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference be more than predetermined threshold value M, then will
Currently carry out the rotor flux ψ that the torque-current transfer algorithm calculatesfIt is multiplied by adjusted coefficient K, obtains revised rotor magnetic
Chain ψf(1)=K ψf；
According to revised rotor flux ψf(1), above-mentioned steps are re-executed, until the amplitude u of current stator phase voltagesWith three-phase
The average value u of voltageavBetween difference be less than predetermined threshold value M.
2. the rotor flux on-line amending method of magneto alternator according to claim 1, which is characterized in that described
Torque-current transfer algorithm when according to maximum torque per ampere control, is calculated based on stator current orientationIt sits
Mark systemThe stator current given value i of axiss *Include with the step of power-factor angle α：
Torque-current transfer algorithm when according to maximum torque per ampere control is calculated based on rotor no-load electromotive force e0It is fixed
To dq coordinate system d axis and q axis components stator current given value id *And iq *；
According to stator current given value id *And iq *It is calculated based on stator current orientationCoordinate systemThe stator electricity of axis
Flow given value is *And power-factor angle α.
3. the rotor flux on-line amending method of magneto alternator according to claim 2, which is characterized in that described
Torque-current transfer algorithm when according to maximum torque per ampere control is calculated based on rotor no-load electromotive force e0Orientation
Dq coordinate system d axis and q axis components stator current given value id *And iq *Based on formula be：
It is described according to stator current given value id *And iq *It is calculated based on stator current orientationCoordinate systemAxis is determined
Electron current given value is *Based on formula be：
It is described according to stator current given value id *And iq *It is calculated based on stator current orientationCoordinate systemThe work(of axis
Formula based on rate factor angle α is：
Wherein, δ is power angle, and φ is internal power factor angle, udAnd uqRespectively permanent magnet synchronous motor is based on turning in steady-state operation
Sub- no-load electromotive force e0The dq coordinate system d axis of orientation and the stator voltage vector value of q axis components, LqFor quadrature axis inductance, LdFor d-axis
Inductance, RsFor stator phase resistance, ωsFor synchronous angular rate.
4. the rotor flux on-line amending method of magneto alternator according to claim 1, which is characterized in that described
According to based on rotor no-load electromotive force e0The angle of orientation, by stator three-phase alternating current Iu、Iv、IwIt is converted to empty based on rotor
Carry electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iqThe step of include：
According to based on rotor no-load electromotive force e0The angle of orientation is converted by Clark transformation and Park, by stator three-phase alternating current
Electric current Iu、Iv、IwIt is converted to and is based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq。
5. the rotor flux on-line amending method of magneto alternator according to claim 1, which is characterized in that described
According to based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq, it is calculated and works as front stator
The amplitude u of phase voltagesBased on formula be：
Wherein, udAnd uqRespectively permanent magnet synchronous motor is based on rotor no-load electromotive force e in steady-state operation0The dq coordinates of orientation
It is the stator voltage vector value of d axis and q axis components, LqFor quadrature axis inductance, LdFor d-axis inductance, ωsFor synchronous angular rate.
6. the rotor flux on-line amending method of magneto alternator according to claim 1, which is characterized in that described
According to stator three-phase voltage Uu、Uv、Uw, the average value u of three-phase voltage is calculatedavBased on formula be：
7. the rotor flux on-line amending method of magneto alternator according to claim 1, which is characterized in that described
If the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference be more than predetermined threshold value M, then will be current
Carry out the rotor flux ψ that the torque-current transfer algorithm calculatesfIt is multiplied by adjusted coefficient K, obtains revised rotor flux
ψf(1)=K ψfThe step of include：
If us-uav＞ M then will currently carry out the rotor flux ψ of the torque-current transfer algorithm calculatingfIt is multiplied by adjusted coefficient K 1
(0.9<K1<1) revised rotor flux ψ, is obtainedf(1)=K1·ψf；
If uav-us＞ M then will currently carry out the rotor flux ψ of the torque-current transfer algorithm calculatingfIt is multiplied by adjusted coefficient K 2
(1<K2<1.1) revised rotor flux ψ, is obtainedf(1)=K2·ψf。
8. a kind of rotor flux on-line amending device of magneto alternator, which is characterized in that including：
First computing unit, torque-current transfer algorithm when for according to maximum torque per ampere control, is calculated and is based on
Stator current orientationCoordinate systemThe stator current given value i of axiss *With power-factor angle α；
Control unit, for according to based on stator current orientationCoordinate systemThe stator current given value i of axiss *And power
Factor angle α controls the output current of magneto alternator by the current transformer of controlled current flow；
First collecting unit, the stator three-phase alternating current I for acquiring the magneto alternator in real timeu、Iv、Iw；
Converting unit, for according to based on rotor no-load electromotive force e0The angle of orientation, by stator three-phase alternating current Iu、Iv、Iw
It is converted to and is based on rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the current component i of q axisd、iq；
Second computing unit, for according to based on rotor no-load electromotive force e0The current component of dq the coordinate system d axis and q axis of orientation
id、iq, the amplitude u of current stator phase voltage is calculateds；
Second collecting unit, the stator three-phase voltage U for acquiring the magneto alternator in real timeu、Uv、Uw；
Third computing unit, for according to stator three-phase voltage Uu、Uv、Uw, the average value u of three-phase voltage is calculatedav；
Judging unit, the amplitude u for judging current stator phase voltagesWith the average value u of three-phase voltageavBetween difference whether
More than predetermined threshold value M；
Amending unit, if the amplitude u for current stator phase voltagesWith the average value u of three-phase voltageavBetween difference be more than it is pre-
If threshold value M, then the rotor flux ψ of the torque-current transfer algorithm calculating will be currently carried outfIt is multiplied by adjusted coefficient K, is repaiied
Rotor flux ψ after justf(1)=K ψf；
Output unit is used for revised rotor flux ψf(1)Output re-executes above-mentioned step to first computing unit
Suddenly, until the judging unit judges the amplitude u of current stator phase voltagesWith the average value u of three-phase voltageavBetween difference it is small
In predetermined threshold value M.
9. the rotor flux on-line amending device of magneto alternator according to claim 8, which is characterized in that described
First computing unit includes：
First computing module, torque-current transfer algorithm when for according to maximum torque per ampere control, is calculated and is based on
Rotor no-load electromotive force e0The dq coordinate system d axis of orientation and the stator current given value i of q axis componentsd *And iq *；
Second computing module, for according to stator current given value id *And iq *It is calculated based on stator current orientationIt sits
Mark systemThe stator current given value i of axiss *And power-factor angle α.
10. the rotor flux on-line amending device of magneto alternator according to claim 8, which is characterized in that institute
Stating amending unit includes：
First correcting module, if being used for us-uav＞ M then will currently carry out the rotor magnetic of the torque-current transfer algorithm calculating
Chain ψfIt is multiplied by adjusted coefficient K 1 (0.9<K1<1) revised rotor flux ψ, is obtainedf(1)=K1·ψf；
Second correcting module, if being used for uav-us＞ M then will currently carry out the rotor magnetic of the torque-current transfer algorithm calculating
Chain ψfIt is multiplied by adjusted coefficient K 2 (1<K2<1.1) revised rotor flux ψ, is obtainedf(1)=K2·ψf。
11. a kind of controller of magneto alternator, which is characterized in that including any permanent magnetism of claim 8 to 10
The rotor flux on-line amending device of synchronous generator.
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| CN108494186B (en) * | 2018-04-20 | 2019-06-18 | 河北工业大学 | A kind of optimization method improving ferrite assist type synchronous magnetic resistance motor power factor |
| CN108649851B (en) * | 2018-06-08 | 2019-12-20 | 郑州轻工业学院 | Maximum torque current ratio control method for permanent magnet synchronous motor |
| CN109921713B (en) * | 2019-02-28 | 2021-01-08 | 南京理工大学 | Machine side converter fault-tolerant control method based on d-axis current injection |
| CN112422011B (en) * | 2019-08-23 | 2022-07-08 | 广东美的生活电器制造有限公司 | Motor control method and system, computer readable storage medium and household appliance |
| CN113162502B (en) * | 2020-01-22 | 2024-01-23 | 北京新能源汽车股份有限公司 | Correction method and device for calibration value of synchronous motor |
| CN111769595A (en) * | 2020-07-07 | 2020-10-13 | 南京工程学院 | Parameter identification-based equivalent capacitance solving method for wind driven generator network side converter |
| WO2022120772A1 (en) * | 2020-12-11 | 2022-06-16 | 深圳市英威腾电气股份有限公司 | Magnetic field orientation correction method and apparatus for permanent magnet synchronous motor, device and medium |
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