CN102738812B - Indirect torque control cage type rotor brushless double-fed motor reactive power control method - Google Patents
Indirect torque control cage type rotor brushless double-fed motor reactive power control method Download PDFInfo
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Abstract
The invention discloses an indirect torque control cage type rotor brushless double-fed motor reactive power control method. The control method is a cage type rotor brushless double-fed motor reactive power, rotation speed and torque control method, particularly an analytic relation between reactive power and a control winding magnetic linkage, as well as a reactive power control structure constructed on the foundation of a cage type rotor brushless double-fed motor indirect torque control system. The control method solves a control problem of reactive power in the brushless double-fed motor indirect torque control. The control system only needs resistors of two stator windings, the required motor parameters are less, the transformation of rotational coordinates is not needed, the control system is provided with a torque internal ring and can realize current amplitude limit; and the control of the cage type rotor brushless double-fed motor reactive power, an electrical torque and a magnetic linkage is realized under an alpha beta rest frame. The control method is simple and the effect is obvious.
Description
Technical field
The present invention is relevant with the Reactive Power Control method of cage-type rotor brushless dual-feed motor, says in more detail a kind of Reactive Power Control method of the cage-type rotor brushless dual-feed motor based on Indirect Torque control.
Background technology
Cage-type rotor brushless dual-feed motor is a kind of New-type electric machine receiving a lot of attention in recent years, its structure is the three-phase symmetric winding that has the separate different numbers of poles of two covers on stator, be power winding and control winding, respectively by electrical network and inverter supply, two cover stator winding share an iron core, this double winding does not have direct electromagnetic coupled, but indirectly carries out the transmission of electromagnetic power by the modulating action of rotor winding; Rotor adopts special cagelike structure.This motor is particularly suitable for large-scale Prospect of AC Adjustable Speed Drive system and variable-speed constant-frequency wind power generation field, has that brushless, required frequency inverter capacity is little, power factor is adjustable, reliable and reduced-maintenance advantage.Along with the solution of many problems in cage-type rotor brushless dual-feed motor structure, people's research emphasis has been transferred to control strategy aspect.In existing document, the method such as vector control, direct torque control has all been applied in brushless dual-feed motor control, and wherein vector control has two kinds of system configurations, has all realized idle control, but all needs to be rotated coordinate transform, makes system configuration complexity, in addition, one wherein (is shown in document Shao shiyi, Abdi Ehsan, Barati Farhad, McMahon Richard.Stator-Flux-Oriented vector control for brushless doubly fed induction generator[J] .IEEE Transactions on Industrial Electronics, 2009, 56 (10): 4220-4228.) owing to there is no current inner loop, thereby lack current limiting measures, dynamic property is also affected, another (sees document J.Poza, E. Oyarbide, I. Sarasola, M. Rodriguez, " Vector control design and experimental evaluation for the brushless doubly fed machine, " IET Electric Power Applications, vol. 3, no. 4, pp.247-256, 2009.) although there is current inner loop, but use the too many parameter of electric machine, the robustness of system is reduced.
Direct torque just can be realized the direct control of torque under rest frame, has avoided rotation transformation, and system configuration is short and sweet.But due within a sampling period only with a space vector of voltage, while causing low-frequency operation, torque pulsation is large, control winding current harmonic wave is also larger, and does not realize idle control.
The Indirect Torque control method of cage-type rotor brushless dual-feed motor is simple without rotating coordinate transformation, system configuration, and there is ring in torque, realize current-limiting function, and the parameter of electric machine of using is only the resistance of two stator winding, the publication number that applicant has applied for is that 102195547A's the patent of " a kind of Indirect Torque control method for cage-type rotor brushless dual-feed motor " has realized the control of rotating speed and torque, but can not realize the control of reactive power.
Summary of the invention
The proposition of problem: for the uncontrollable problem of reactive power in cage-type rotor brushless dual-feed motor Indirect Stator-Quantities Control System; The invention provides a kind of Indirect Torque control cage-type rotor brushless dual-feed motor Reactive Power Control method.
The uncontrollable problem of reactive power existing in order to solve above-mentioned cage-type rotor brushless dual-feed motor Indirect Stator-Quantities Control System, the present invention is on the basis of cage-type rotor brushless dual-feed motor Indirect Stator-Quantities Control System, build Indirect Torque control cage-type rotor brushless dual-feed motor Reactive Power Control method, comprised the method for the control of rotating speed and torque; The method follows these steps to carry out:
Model reactive power and control winding magnetic linkage relational expression (7) are as follows:
（7）
In formula (7):
qfor reactive power,
ω c =2 π
f c for controlling winding frequency;
l hp =N r * M spr /2,
l hc =N r * M scr /2,
n r for cage-type rotor nested cell number,
m spr for the mutual inductance amplitude of power winding and each unit of rotor winding,
m scr for controlling winding and each unit mutual inductance amplitude of rotor winding;
l p ,
l c with
l r be respectively power winding self-induction, control winding self-induction and rotor winding self-induction;
for controlling winding flux linkage vector;
it is power winding voltage vector;
θ up -
θ ψ c for power winding voltage vector and the phase angle difference of controlling winding flux linkage vector;
Next is to build Indirect Torque control cage-type rotor brushless dual-feed motor power reactive power control system, realizes the control method of reactive power.
In technique scheme, further technical characterictic is:
Power winding voltage vector in described (7) formula
, the parameter of electric machine
l hp ,
l hc ,
l p ,
l c with
l r constant, by controlling the flux linkage vector of winding
control reactive power
q.
Described structure Indirect Torque control cage-type rotor brushless dual-feed motor power reactive power control system is by the set-point of reactive power
q * with calculated value
qthrough idle pi regulator (19), the set-point of winding magnetic linkage amplitude is controlled in output
; To control again winding magnetic linkage amplitude given
and calculated value
control winding magnetic linkage amplitude increment through magnetic linkage pi regulator (12) output
k s .
Described Reactive Power Control method follows these steps to carry out:
(1) relational expression of derivation reactive power and control winding magnetic linkage is as follows:
（7）
In formula (7):
qfor reactive power,
ω c =2 π
f c for controlling winding frequency;
l hp =N r * M spr /2,
l hc =N r * M scr /2,
n r for cage-type rotor nested cell number,
m spr for the mutual inductance amplitude of power winding and each unit of rotor winding,
m scr for controlling winding and each unit mutual inductance amplitude of rotor winding;
l p ,
l c with
l r be respectively power winding self-induction, control winding self-induction and rotor winding self-induction;
for controlling winding flux linkage vector;
it is power winding voltage vector;
θ up -
θ ψ c for power winding voltage vector and the phase angle difference of controlling winding flux linkage vector;
(2) according to the formula (7) in above-mentioned steps (1), power winding voltage vector
, the parameter of electric machine
l hp ,
l hc ,
l p ,
l c with
l r be constant, from formula (7), obtain controlling by control the flux linkage vector of winding
control reactive power
q;
(3) according to the flux linkage vector of the control winding in above-mentioned steps (2)
and reactive power
qbetween relation, utilize reactive power set-point
q * with calculated value
qthrough idle pi regulator (19), the set-point of winding magnetic linkage amplitude is controlled in output
;
(4) the cage-type rotor brushless dual-feed motor power reactive power control system of the Indirect Torque control building to (3) based on above-mentioned steps (1), the process that realizes this control method is as follows:
1) under three phase static coordinate system, observe respectively A phase and the B phase component of controlling winding, power winding voltage, electric current
u ac ,
u bc ,
u ap ,
u bp , i ac ,
i bc ,
i ap with
i bp;
above-mentioned physical quantity is carried out to coordinate transform by 3/2 converter (16), and controlled winding and power winding are separately
α βvoltage and current under rest frame
u α c ,
u β c ,
u α p ,
u β p ,
i α c , i β c , i α p with
i β p ;
2) utilize
i α p ,
i β p ,
u α p ,
u β p calculate (18) by reactive power and calculate reactive power calculating value
q;
3) utilize
u α c ,
u β c ,
u α p ,
u β p ,
i α c , i β c , i α p with
i β p by electromagnetic torque and power winding, control winding flux linkage calculation (15) and calculate and control winding magnetic linkage component
ψ α c ,
ψ β c with power winding magnetic linkage component
ψ α p ,
ψ β p , according to
ψ α c with
ψ β c calculate and control winding magnetic linkage amplitude
;
4) by electromagnetic torque and power winding, control winding flux linkage calculation (15) and calculate electromagnetic torque controlling under winding and power winding rest frame separately respectively, sum of the two is total electromagnetic torque;
5) obtain dwell angle Δ Xst by controlling winding magnetic linkage dwell angle calculating (9), obtain magnetic linkage dynamic angular Δ X by PI torque controller (8)
d, the control winding magnetic linkage in the next sampling period Tpwm of sum of the two changes angle Δ X;
6) utilize the set-point of reactive power
q * with calculated value
qthrough idle pi regulator (19), the set-point of winding magnetic linkage amplitude is controlled in output
;
7) utilize control winding magnetic linkage amplitude given
and calculated value
export through magnetic linkage pi regulator (12)
k s ; Utilize and control winding magnetic linkage
ψ α c ,
ψ β c and
k s change angle Δ X by controlling winding magnetic linkage increment Delta with control winding magnetic linkage
ψ s calculate (13) and calculate control winding magnetic linkage increment Delta
ψ α c , Δ
ψ β c ;
8) utilize and control winding magnetic linkage increment Delta
ψ α c , Δ
ψ β c , by controlling winding voltage
u α c ,
u β c calculate (14), calculate next cycle
t pwm interior required voltage vector
u α c ,
u β c ;
9) SVPWM generator (4) basis
u α c with
u β c generate modulation signal, and control the control winding of brushless dual-feed motor (17) by inverter (3).
A kind of Indirect Torque control cage-type rotor brushless dual-feed motor Reactive Power Control method, compared with prior art, derive first cage-type rotor brushless dual-feed motor reactive power and control the relation between winding magnetic linkage, build reactive controller, in cage-type rotor brushless dual-feed motor Indirect Stator-Quantities Control System, realized the control of reactive power.Control reactive power and can improve the power factor of motor, thereby reduce the electric energy loss of flowing and bringing because of idle.In addition the controlled generator operation state for brushless dual-feed motor of reactive power is prerequisite basic function, thereby idle control can be stablized line voltage, raising power grid quality brings larger economic benefit.
The inventive method not only can be controlled rotating speed and torque, and has realized the control of reactive power; Not only can be applied to the motor-operated running state of cage-type rotor brushless dual-feed motor, and can be applied to generator operation state.
Brief description of the drawings
Fig. 1 be the inventive method based on system configuration schematic diagram.
Fig. 2 to Fig. 7 is that the present invention is given rotating speed 855r/min, given reactive power
q *the experimental result of regulating load under the condition of=0var, shock load under empty load of motor running status, then anticlimax is loaded to zero load again.Fig. 2,3,4,5,6,7 is respectively power winding reactive power, power winding power factor, power winding voltage electric current, rotating speed, torque, control winding magnetic linkage waveform.
In figure: 1: diode rectifier; 2: filter capacitor; 3: inverter; 4:SVPWM generator; 5: comparator; 6: speed pi regulator; 7: comparator; 8: PI torque controller; 9: control winding magnetic linkage dwell angle and calculate; 10: adder; 11: comparator; 12: magnetic linkage pi regulator; 13: control winding magnetic linkage increment Delta ψ s and calculate; 14: control winding voltage u α c, u β c and calculate; 15: electromagnetic torque and power winding, control winding flux linkage calculation; 16:3/2 converter; 17: brushless dual-feed motor; 18: reactive power is calculated; 19: idle pi regulator; 20: comparator.
Embodiment
Below the specific embodiment of the present invention is further detailed:
As Fig. 1, implement Indirect Torque control cage-type rotor brushless dual-feed motor Reactive Power Control method of the present invention, its device of realizing the method is by diode rectifier 1, filter capacitor 2, inverter 3, SVPWM generator 4, comparator 5, speed pi regulator 6, comparator 7, PI torque controller 8, control winding magnetic linkage dwell angle and calculate 9, adder 10, comparator 11, magnetic linkage pi regulator 12, controls winding magnetic linkage increment Delta
ψ s calculate 13, control winding voltage
u α c ,
u β c calculate 14, electromagnetic torque and power winding, control winding flux linkage calculation 15,3/2 converters 16, brushless dual-feed motor 17, reactive power calculates 18, idle pi regulator 19, comparator 20 forms; Six outputs of SVPWM generator 4 connect the control end of inverter 3, the output of speed pi regulator 6
t e *with electromagnetic torque and power winding, control the output of winding flux linkage calculation 15
t e be connected with PI torque controller 8 inputs through comparator 7,8 output is connected in a positive input of adder 10, another positive input of adder 10 is the output of controlling winding magnetic linkage dwell angle calculating 9, and the output of adder 10 is to control winding magnetic linkage increment Delta
ψ s calculate an input of 13, other 3 inputs of 13 are respectively the output of electromagnetic torque and power, control winding flux linkage calculation 15
ψ α c ,
ψ β c output with magnetic linkage pi regulator 12
k s , 12 input is to control winding flux linkage set
with by electromagnetic torque and power winding, control the output of winding flux linkage calculation 15
value after comparator 11,18 input is
i α p ,
i β p ,
u α p ,
u β p , 18 output is idle
qbe an input of adder 20, another input of 20 is given idle
q * , 20 output is the input of idle pi regulator 19,19 output is to control winding flux linkage set
, i.e. 12 input.Control winding magnetic linkage increment Delta
ψ s calculate 13 output and control winding voltage
u α c ,
u β c the input of calculating 14 is connected, 14 output is connected with the input of SVPWM generator 4, the signal output part of 3/2 converter 16 and electromagnetic torque and power winding, the input of controlling winding flux linkage calculation 15 are connected, inverter 3 is connected with the control winding of brushless dual-feed motor 17, rotating speed and the speed preset of the brushless dual-feed motor 17 detecting by code-disc
ω * after comparator 5, be connected with 6 inputs of speed pi regulator.
Implement a kind of Indirect Torque control of the present invention cage-type rotor brushless dual-feed motor Reactive Power Control method, comprise the control method of rotating speed and torque; Described in it, control method is to follow these steps to carry out:
The relation of step 1, derivation reactive power and control winding magnetic linkage, process is as follows:
Reactive power is expressed formula suc as formula (1):
（1）
In formula (1)
be power winding current vector conjugation,
for power winding voltage vector.
According to the magnetic linkage equation of brushless dual-feed motor control winding rest frame, can obtain:
（2）
In formula (2)
l hp =N r * M spr /2,
l hc =N r * M scr /2,
n r for cage-type rotor nested cell number,
m spr for the mutual inductance amplitude of power winding and each unit of rotor winding,
m scr for controlling the mutual inductance amplitude of winding and each unit of rotor winding;
l p ,
l c with
l r be respectively power winding self-induction, control winding self-induction and rotor winding self-induction;
for controlling the flux linkage vector of winding;
,
respectively rotor current, control winding current vector.
The rotor voltage equation of (2) substitution brushless dual-feed motor control winding interdiction model is obtained:
（3）
In formula (3),
p p power winding number of pole-pairs,
ω r rotor velocity,
r r it is rotor one phase resistance.
Due to (
d/
dt-
jp p ω r ) all very large in dynamic and stable state:
（4）
After arrangement, obtaining current phasor controlling the expression formula that winding static coordinate fastens is:
（5）
Flux linkage vector in formula (1)
in the expression formula of controlling in winding rest frame be:
（6）
(5), (6) substitution (1) are obtained:
（7）
In formula (7):
θ up -
θ ψ c for power winding voltage and control winding magnetic linkage phase angle difference.
In step 2, above-mentioned formula (7), power winding voltage vector
, parameter of electric machine power winding and rotor winding mutual inductance
l hp , control winding and rotor winding mutual inductance
l hc , power winding self-induction
l p , control winding self-induction
l c with rotor winding self-induction
l r be constant, from formula (7), can control by control the flux linkage vector of winding
control reactive power
q;
Step 3, according in above-mentioned (7) formula
and reactive power
qbetween relation, utilize the set-point of reactive power
q * with calculated value
qcontrol the set-point of winding magnetic linkage amplitude through idle pi regulator 19 outputs
;
The cage-type rotor brushless dual-feed motor power reactive power control system of step 4, Indirect Torque control based on above-mentioned structure, realize this control method process as follows:
1) A phase and the B phase component of observation control winding, power winding voltage electric current under three phase static coordinate system
u ac ,
u bc ,
u ap ,
u bp , i ac ,
i bc ,
i ap ,
i bp , above-mentioned physical quantity is carried out to the coordinate transform of three-phase/two-phase by 3/2 converter 16, controlled winding and power winding are separately
α βvoltage and current under rest frame
u ac ,
u bc ,
u ap ,
u bp ,
i α c , i β c , i α p , i β p.
2) utilize
i α p ,
i β p ,
u α p ,
u β p calculate 18 by reactive power and calculate reactive power value of feedback
q, formula is as shown in (8):
（8）
3) utilize
u ac ,
u bc ,
u ap ,
u bp ,
i α c , i β c , i α p , i β p with
u-imodel passes through electromagnetic torque and power winding, controls winding flux linkage calculation 15 calculating control winding magnetic linkage components
ψ α c ,
ψ β c with power winding magnetic linkage component
ψ α p ,
ψ β p , according to
ψ α c with
ψ β c calculate and control winding magnetic linkage amplitude
.Formula is as shown in (9):
（9）
Wherein
r c ,
r p be respectively and control winding and power winding one phase resistance;
ψ α c ,
ψ β c to control winding
α βmagnetic linkage component under rest frame;
to control winding
α βmagnetic linkage amplitude under rest frame;
ψ α p ,
ψ β p it is power winding
α βmagnetic linkage component under rest frame;
4) by electromagnetic torque and power winding, control winding flux linkage calculation 15 and calculate electromagnetic torque controlling under winding and power winding rest frame separately respectively.Formula is as shown in (10):
（10）
Wherein
p p ,
p c be respectively power winding and control winding number of pole-pairs.
5) control winding magnetic linkage and change angle Δ
xcalculate, first calculate 9 calculating dwell angles by controlling winding magnetic linkage dwell angle.By the controlled winding frequency of rotor speed
f c,
（11）
In formula (11)
n r for rotor speed,
f p for power winding frequency,
p r =p p + p c for rotor winding number of pole-pairs,
f c "+" number represents metasynchronism state above, and "-" number represents supersynchronous state; Dwell angle Δ
x st calculated by following formula:
（12）
(12) in formula
ω c =2 π
f c for controlling winding angular frequency.Control winding magnetic linkage dynamic angular Δ
x d by
t e *-
t e obtain through PI torque controller 8, control winding magnetic linkage and change angle as the formula (13):
（13）
6) utilize brushless dual-feed motor reactive power set-point
q * and calculated value
qexport flux linkage set amplitude through idle pi regulator 19
.
7) utilize and control winding flux linkage set amplitude
and calculated value
export through magnetic linkage pi regulator 12
k s .Control winding magnetic linkage
ψ α c ,
ψ β c and
k s change angle Δ with control winding magnetic linkage
xby controlling winding magnetic linkage increment Delta
ψ s calculate 13 and calculate control winding magnetic linkage increment Delta
ψ α c , Δ
ψ β c , formula is as shown in (14):
（14）
8) utilize and control winding magnetic linkage increment Delta
ψ α c , Δ
ψ β c by controlling winding voltage
u α c , u β c calculate 14, calculate next cycle
t pwm interior required voltage vector
u α c , u β c , formula is as shown in (15):
（15）
9) SVPWM generator 4 bases
u α c with
u β c generate modulation signal, and control the control winding of brushless dual-feed motor 17 by inverter 3.
Adopt the experimental result of such scheme of the present invention as shown in Figure 2 to 7.Model machine parameter: power winding is 6 utmost points, controlling winding is 2 utmost points, power winding power 3KW, power winding connects 380V/50Hz power frequency supply, controls winding power 1.5KW, power winding one phase resistance
r p =3.2 Ω, control winding one phase resistance
r c =5.32 Ω, rotor one phase resistance
r r =0.173m Ω, inductance parameters: power winding self-induction
l p =292mH, power winding and rotor winding mutual inductance
l hp =2.16mH, controls winding self-induction
l c =642mH, controls winding and rotor winding mutual inductance
l hc =4mH, rotor winding self-induction
l r =0.048mH, moment of inertia
j=0.064kgm
2.Fig. 2 to Fig. 7 is given rotating speed 855r/min, given reactive power
q *the experimental result of regulating load under the condition of=0var, shock load under empty load of motor running status, then anticlimax is loaded to zero load again.Fig. 2,3,4,5,6,7 is respectively power winding reactive power, power winding power factor, power winding voltage electric current, rotating speed, torque, control winding magnetic linkage waveform.
As can be seen from Figure 2, in the dynamic process of impact and anticlimax load, reactive power is got back to given after of short duration adjusting; The power factor of power winding remains near 1 as can be seen from Figure 3, as can be seen from Figure 4 power winding voltage and electric current same-phase when stable state.These 3 figure explanation this method can realize idle control.Can find out that from Fig. 5 and Fig. 6 system is under load disturbance situation, rotating speed and torque ring can normally be worked, and system operates steadily., Fig. 7 illustrates that control winding magnetic linkage reduces in the time that load increases, and illustrates that this method is in order to keep idle constant, according to loading condition auto-adjustment control winding magnetic linkage.Above-mentioned experimental result shows the feasibility of the cage-type rotor brushless dual-feed motor Reactive Power Control method based on Indirect Torque control that the present invention proposes.
Claims (1)
1. an Indirect Torque control cage-type rotor brushless dual-feed motor Reactive Power Control method, comprises the control method of rotating speed and torque; Described in it, control method is to follow these steps to carry out:
(1) set up reactive power and control winding magnetic linkage relational expression (7) as follows:
（7）
In formula (7):
qfor reactive power,
ω c =2 π
f c for controlling winding frequency;
l hp =N r * M spr /2,
l hc =N r * M scr /2,
n r for cage-type rotor nested cell number,
m spr for the mutual inductance amplitude of power winding and each unit of rotor winding,
m scr for controlling winding and each unit mutual inductance amplitude of rotor winding;
l p ,
l c with
l r be respectively power winding self-induction, control winding self-induction and rotor winding self-induction;
for controlling winding flux linkage vector;
it is power winding voltage vector;
θ up -
θ ψ c for power winding voltage vector and the phase angle difference of controlling winding flux linkage vector;
(2) according to the formula (7) in above-mentioned steps (1), power winding voltage vector is set
, the parameter of electric machine
l hp ,
l hc ,
l p ,
l c with
l r constant, by the flux linkage vector that obtains controlling by control winding in formula (7)
control reactive power
q;
(3) according to the flux linkage vector of the control winding in above-mentioned steps (2)
and reactive power
qbetween relation, utilize reactive power set-point
q * with calculated value
qthrough idle pi regulator (19), the set-point of winding magnetic linkage amplitude is controlled in output
;
(4) the cage-type rotor brushless dual-feed motor power reactive power control system of the Indirect Torque control building to (3) based on above-mentioned steps (1), the process that realizes this control method is as follows:
1) under three phase static coordinate system, observe respectively A phase and the B phase component of controlling winding, power winding voltage, electric current
u ac ,
u bc ,
u ap ,
u bp , i ac ,
i bc ,
i ap with
i bp;
above-mentioned physical quantity is carried out to coordinate transform by 3/2 converter (16), and controlled winding and power winding are separately
α βvoltage and current under rest frame
u α c ,
u β c ,
u α p ,
u β p ,
i α c , i β c , i α p with
i β p ;
2) utilize
i α p ,
i β p ,
u α p ,
u β p calculate (18) by reactive power and calculate reactive power calculating value
q;
3) utilize
u α c ,
u β c ,
u α p ,
u β p ,
i α c , i β c , i α p with
i β p by electromagnetic torque and power winding, control winding flux linkage calculation (15) and calculate and control winding magnetic linkage component
ψ α c ,
ψ β c with power winding magnetic linkage component
ψ α p ,
ψ β p , according to
ψ α c with
ψ β c calculate and control winding magnetic linkage amplitude
;
4) by electromagnetic torque and power winding, control winding flux linkage calculation (15) and calculate electromagnetic torque controlling under winding and power winding rest frame separately respectively, sum of the two is total electromagnetic torque;
5) obtain dwell angle Δ Xst by controlling winding magnetic linkage dwell angle calculating (9), obtain magnetic linkage dynamic angular Δ X by PI torque controller (8)
d, the control winding magnetic linkage in the next sampling period Tpwm of sum of the two changes angle Δ X;
6) utilize the set-point of reactive power
q * with calculated value
qthrough idle pi regulator (19), the set-point of winding magnetic linkage amplitude is controlled in output
;
7) utilize and control the given and calculated value of winding magnetic linkage amplitude
through magnetic linkage pi regulator (12) output ks; Utilize and control winding magnetic linkage ψ α c, ψ β c and ks and control winding magnetic linkage variation angle Δ X by controlling winding magnetic linkage increment Delta
ψ s calculate (13) and calculate control winding magnetic linkage increment Delta
ψ α c , Δ
ψ β c ;
8) utilize and control winding magnetic linkage increment Delta
ψ α c , Δ
ψ β c , by controlling winding voltage
u α c ,
u β c calculate (14), calculate next cycle
t pwm interior required voltage vector
u α c ,
u β c ;
9) SVPWM generator (4) basis
u α c with
u β c generate modulation signal, and control the control winding of brushless dual-feed motor (17) by inverter (3);
Described structure Indirect Torque control cage-type rotor brushless dual-feed motor power reactive power control system is that the set-point Q* of reactive power and calculated value Q are exported to the set-point of controlling winding magnetic linkage amplitude through idle pi regulator (19); To control again the given and calculated value of winding magnetic linkage amplitude
control winding magnetic linkage amplitude increment ks through magnetic linkage pi regulator (12) output.
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|---|---|---|---|---|
| CN104579060B (en) * | 2015-01-30 | 2017-10-24 | 太原理工大学 | The indirect power control method of cage-type rotor brushless dual-feedback wind power generator |
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| CN111082722B (en) * | 2020-01-02 | 2023-06-23 | 广西大学 | Asynchronous motor stator flux linkage and torque multi-time scale double-level voltage control method |
| CN114329949B (en) * | 2021-12-26 | 2023-08-15 | 中国大唐集团新能源科学技术研究院有限公司 | Simulation modeling method for brushless doubly-fed motor of cage rotor |
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