CN107124126A - The no phase-locked loop current control method and device of a kind of double fed induction generators - Google Patents

The no phase-locked loop current control method and device of a kind of double fed induction generators Download PDF

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CN107124126A
CN107124126A CN201710205022.5A CN201710205022A CN107124126A CN 107124126 A CN107124126 A CN 107124126A CN 201710205022 A CN201710205022 A CN 201710205022A CN 107124126 A CN107124126 A CN 107124126A
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msub
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CN107124126B (en
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程鹏
李庆
张金平
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Zhongdian Saipu Certification & Inspection (beijing) Co Ltd
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd
China Electric Power Research Institute Co Ltd CEPRI
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Zhongdian Saipu Certification & Inspection (beijing) Co Ltd
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Shanxi Electric Power Co Ltd
China Electric Power Research Institute Co Ltd CEPRI
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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
    • H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
    • 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
    • H02P21/22—Current control, e.g. using a current control loop
    • 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
    • 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
    • H02P2103/00—Controlling arrangements characterised by the type of generator
    • H02P2103/10—Controlling arrangements characterised by the type of generator of the asynchronous type

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

The invention provides the no phase-locked loop current control method and device of a kind of double fed induction generators, methods described includes：Gather the parameter of double fed induction generators and carry out coordinate transform, obtain stator voltage vector UsαβWith stator current vector Isαβ；To stator voltage vector UsαβWith stator current vector IsαβCoordinate transform is carried out, stator voltage vector U is obtainedsdqWith stator current vector Isdq；Calculate the stator current vector I of double fed induction generatorssdqD, q axle instruction；Calculate the rotor voltage instruction U under virtual synchronous rotating coordinate systemrdq；U is instructed to rotor voltagerdqCoordinate transform is carried out, the rotor voltage instruction U under the static α β coordinate systems of two-phase is obtainedrαβ, and then generate one group of pwm signal the rotor current transformer of double fed induction generators is controlled.The technical scheme that the present invention is provided simplifies Control System Design and implementing procedure, enhances the adaptability that control system changes to generator parameter.

Description

The no phase-locked loop current control method and device of a kind of double fed induction generators
Technical field
The present invention relates to double-fed induction wind driven generator control field, and in particular to a kind of double fed induction generators without lock Phase circular current control method and device.
Background technology
As double-fed fan motor unit is in the extensive installation and application of wind power plant, double fed induction generators are sent out as whole unit The core cell of electric part, it runs has obtained primary study with control technology.At present, the control program of double fed induction generators Mainly there are two kinds：Vector controlled and direct Power Control.
Vector controlled, is typically implemented in synchronous rotating frame, and corresponding control is constructed by controlled device of rotor current Closed loop processed, by adjusting the excitation component and torque component of rotor current, so as to realize indirectly to double fed induction generators stator Export the control of active and reactive electric current.Wherein, rotor current command configuration but shows the strong dependency to generator parameter, But in actual motion, double fed induction generators parameter is in nonlinear change, it is difficult to obtain its accurate parameter, this will be to double Feedback influence generator exports active and reactive current strap to significantly affect.
Direct Power Control, initially uses hystersis controller and switch list issuer according to the error of active and reactive power Method produces rotor voltage instruction, and this structure eliminates current regulator and makes control structure greatly abbreviation, but due to converter The unfixed disadvantage of switching frequency, causes the negative effects such as current harmonics bandwidth, wave filter design difficulty.Therefore, Zhi.D W and Xu.L is in entitled Direct power control of DFIG with constant switching frequency and improved transient performance(IEEE Transactions on Energy Conversion, 2007,22(1):A kind of direct Power Control of permanent switching frequency is proposed in document 110-118.), the core of this method is The stator magnetic linkage or stator voltage phase angle obtained according to phaselocked loop carries out coordinate transform to the voltage, the electric current that measure, by having Work(, reactive power error can obtain corresponding excitation voltage instruction by pi regulator.In IEEE, IEC and the electric energy matter of China Measure in relevant criterion, corresponding quantitative target is all proposed to grid-connected current, but direct Power Control is due to lacking for electric current Closed loop regulation, it is difficult to control output current quality.
In addition, vector controlled, direct Power Control, general to extract electric network voltage phase angle, and conduct using phaselocked loop more The reference data of control system.However, at present there are some researches prove, phaselocked loop will cause current transformer to export negative impedance, and with The effect of intercoupling of power network positive impedance produces oscillatory occurences, and unstable phenomenon even occurs when serious.
Accordingly, it would be desirable to the no phase-locked loop current control method and device of a kind of double fed induction generators, to simplify control System design and implementing procedure, the adaptability that enhancing control system changes to generator parameter.
The content of the invention
The present invention provides a kind of no phase-locked loop current control method of double fed induction generators, and methods described includes following step Suddenly：
Step 1：The parameter of double fed induction generators is gathered, coordinate transform is carried out to the parameter, static alpha-beta coordinate is obtained Stator voltage vector U under systemsαβWith stator current vector Isαβ；
Step 2：According to virtualphase parallactic angle θ0To stator voltage vector UsαβWith stator current vector IsαβCarry out coordinate transform, Obtain the stator voltage vector U under virtual synchronous rotating coordinate systemsdqWith stator current vector Isdq；
Step 3：Calculate the stator current vector I of double fed induction generatorssdqD, q axle instruction；
Step 4：Value of feedback with actual measurement is instructed according to double fed induction generators stator current d, q axle, calculates virtual Rotor voltage instruction U under synchronous rotating framerdq；
Step 5：U is instructed to rotor voltagerdqCoordinate inverse transformation is carried out, turning under the static alpha-beta coordinate system of rotor two-phase is obtained Sub- voltage instruction Urαβ；
Step 6：U is instructed according to the rotor voltagerαβ, rotor change of the one group of pwm signal of generation to double fed induction generators Stream device is controlled.
The parameter that the step 1 is gathered includes the threephase stator voltage vector U of double fed induction generatorssabc, threephase stator Current phasor Isabc, rotor rotation angular rate ωrAnd rotor position angle θr。
The step 1 is according to following formula to the threephase stator voltage vector UsabcWith threephase stator current phasor IsabcCarry out Coordinate transform：
Wherein：usαAnd usβRespectively stator voltage vector Usαβα axis components and beta -axis component, isαAnd isβRespectively stator Current phasor Isαβα axis components and beta -axis component, usa、usbAnd uscRespectively threephase stator voltage vector UsabcA axles, b axles and C-axis component, isa、isbAnd iscRespectively threephase stator current phasor IsabcA axles, b axles and c-axis component.
Virtualphase parallactic angle θ is calculated as follows in the step 20：
θ0The π f of=∫ 20dt
Wherein：f0=50Hz is fixed rotation angular frequency, virtualphase parallactic angle θ0Be be 20 milliseconds in the cycle, the saw that amplitude is 2 π Tooth ripple signal.
The step 2 is as the following formula to stator voltage vector UsαβWith stator current vector IsαβCarry out coordinate transform：
Wherein：usdAnd usqRespectively stator voltage vector UsdqD axis components and q axis components, isdAnd isqRespectively stator Current phasor IsdqD axis components and q axis components, usαAnd usβRespectively stator voltage vector Usαβα axis components and beta -axis component, isαAnd isβRespectively stator current vector Isαβα axis components and beta -axis component, θ0For virtualphase parallactic angle.
The stator current I of double fed induction generators is calculated as follows in the step 3sdqD axles and q axles instruction isd.refWith isq.ref：
Wherein：usdAnd usqRespectively stator voltage vector UsdqD axis components and q axis components, Ps.refAnd Qs.refFor double-fed Influence generator stator active and reactive power is instructed.
The step 4 calculates rotor voltage instruction U with regulating error decoupling compensation algorithmrdq, comprise the following steps：
Step 4-1：With the d axles and the instruction i of q axles of double fed induction generators stator currentsd.refAnd isq.refIt is individually subtracted The d axles and q axis components i of the stator current of actual measurementsdAnd isq, calculate the error signal of double fed induction generators stator current ΔisdWith Δ isq；
Step 4-2：According to the error signal Δ i of double fed induction generators stator currentsdWith Δ isq, calculate virtual synchronous Voltage-regulation vector v' under rotating coordinate systemrdq；
Step 4-3：To voltage-regulation vector v'rdqVoltage decoupling compensation is carried out, is obtained under virtual synchronous rotating coordinate system Rotor voltage instructs Urdq。
The step 4-2 voltage-regulation vectors v'rdqIn the component and the component v' of q axles of d axlesrdAnd v'rqIt is shown below：
Wherein：KpFor proportionality coefficient, KiFor integral coefficient, ω0=2 π f0=100 π are virtual angular velocity of rotation, and s is general to draw Laplacian operater.
Rotor voltage instruction Us of the step 4-3 according to following formulardqTo voltage-regulation vector v'rdqCarry out decoupling benefit Repay：
Wherein：usdAnd usqRespectively stator voltage vector UsdqD axis components and q axis components, erdAnd erqRespectively voltage Decouple vector erdqD axis components and q axis components, ψsdAnd ψsqRespectively stator voltage vector ψsdqD axis components and q axis components, v'rdAnd v'rqRespectively voltage-regulation vector v'rdqD axis components and q axis components, urdAnd urqRespectively rotor voltage instruction Urdq D axis components and q axis components, LrFor the inductor rotor of double fed induction generators, LmIt is mutual for the rotor of double fed induction generators Sense, ωrThe angular rate rotated for double fed induction generators rotor.
Described step 5 instructs U according to following formula to double fed induction generators rotor voltagerdqCarry out coordinate transform：
Wherein：urdAnd urqRespectively rotor voltage instruction UrdqD axis components and q axis components, urαAnd urβRespectively rotor Voltage instruction Urαβα axis components and beta -axis component.
The present invention provides a kind of no phase-locked loop current control device of double fed induction generators, and described device includes：Collection Module, the parameter for gathering double fed induction generators；
First coordinate transformation module, for the threephase stator voltage vector U to collectionsabcWith threephase stator current phasor IsabcCoordinate transform is carried out, the stator voltage vector U under the static alpha-beta coordinate system of two-phase is obtainedsαβWith stator current vector Isαβ；
Second coordinate transformation module, for stator voltage vector UsαβWith stator current vector IsαβCarry out coordinate transform, Obtain the stator voltage vector U under virtual synchronous rotating coordinate systemsdqWith stator current vector Isdq；
Stator current command configuration module, the stator current I for calculating double fed induction generatorssdqD axles and q axles refer to Make isd.refAnd isq.ref；
Rotor voltage instructs configuration module, for calculating the instruction of the rotor voltage under virtual synchronous rotating coordinate system Urdq；
3rd coordinate transformation module, for instructing U to double fed induction generators rotor voltagerdqCoordinate transform is carried out, is obtained Rotor voltage instruction U under the static alpha-beta coordinate system of two-phaserαβ；
Space vector adjustment module, for instructing U according to the rotor voltagerαβGenerate one group of pwm signal.
First coordinate transformation module is connected with the second coordinate transformation module；
The stator current command configuration module, rotor voltage instruction configuration module, the 3rd coordinate transformation module and space Vector adjustment module is sequentially connected.
The rotor voltage instruction configuration module includes stator current closed loop adjustment module and stator current decoupling compensation mould Block.
With immediate prior art ratio, the technical scheme that the present invention is provided has the advantages that：
The technical scheme that the present invention is provided, can remove to set up line voltage synchronizing signal angle, extract positive sequence fundamental frequency voltages Amplitude is the phaselocked loop link of target, Control System Design and implementing procedure is simplified, while closed-loop current control loop In it is unrelated with generator parameter, enhance the adaptability that control system changes to generator parameter.
Brief description of the drawings
Fig. 1 is the no phase-locked loop current control device block diagram of double fed induction generators of the present invention；
Wherein, 1：Double fed induction generators, 2：Voltage sensor module, 3：Current sensor module, 4：Two level voltages Source type 3-phase power converter module, 5：Photoelectric encoder, 6：Clarke conversion modules, 7：Parker conversion modules, 8：Increment type is accumulated Divide device, 9：Stator current command configuration module, 10：Stator current closed loop adjustment module, 11：Stator current decoupling compensation module, 12：Parker inverse transform blocks, 13：Space vector adjustment module, 14：Virtualphase parallactic angle configuration module；
Fig. 2 is double fed induction generators simulation result figure；
Wherein, (a) double fed induction generators threephase stator current simulations result figure, (b) is double fed induction generators three-phase Rotor current simulation result figure, (c) is the active power and reactive power simulation result figure of double fed induction generators, and (d) is void Intend stator current d axis components and its corresponding error simulation result figure in synchronous rotating frame, (e) is that virtual synchronous rotates seat Stator current q axis components and its corresponding error simulation result figure in mark system.
Embodiment
The invention will now be described in further detail with reference to the accompanying drawings：
A kind of no phase-locked loop current control method of double fed induction generators of the present invention, methods described comprises the following steps：
Step 1：The parameter of double fed induction generators is gathered, coordinate transform is carried out to the parameter, the static alpha-beta of two-phase is obtained Stator voltage vector U under coordinate systemsαβWith stator current vector Isαβ；
Step 2：To stator voltage vector UsαβWith stator current vector IsαβCoordinate transform is carried out, virtual synchronous rotation is obtained Stator voltage vector U under coordinate systemsdqWith stator current vector Isdq；
Step 3：According to stator voltage vector Usdq, double fed induction generators active-power PsWith output reactive power Qs, meter Calculate the stator current vector I of double fed induction generatorssdqD, q axle instruction；
Step 4：Value of feedback with actual measurement is instructed according to double fed induction generators stator current d, q axle, calculates virtual Rotor voltage instruction U under synchronous rotating framerdq；
Step 5：According to rotor position angle θrWith virtualphase parallactic angle θ0U is instructed to rotor voltagerdqCoordinate transform is carried out, is obtained Rotor voltage instruction U under the static alpha-beta coordinate system of two-phaserαβ；
Step 6：U is instructed according to the rotor voltagerαβ, one group of pwm signal is obtained to double-fed by SVPWM technical constructions The rotor current transformer of influence generator is controlled.
The parameter that the step 1 is gathered includes the threephase stator voltage vector U of double fed induction generatorssabc, threephase stator Current phasor Isabc, rotor rotation angular rate ωrAnd rotor position angle θr。
Double fed induction generators simulation result figure is illustrated in figure 2, wherein figure (a) is double fed induction generators threephase stator Electric current IsabcSimulation result figure, figure (b) is double fed induction generators three-phase rotor current simulation result figure, and figure (c) is double-fed sense Answer the active-power P of generators(100%-50%-70%-50%-100%, negative sign represents output) and reactive power Qs(0%- 20%-40%-20%-0%, negative sign represents output) simulation result figure.
The step 1 is according to following formula to the threephase stator voltage vector UsabcWith threephase stator current phasor IsabcCarry out Clarke is converted：
Wherein：usαAnd usβRespectively stator voltage vector Usαβα axis components and beta -axis component, isαAnd isβRespectively stator Current phasor Isαβα axis components and beta -axis component, usa、usbAnd uscRespectively threephase stator voltage vector UsabcA axles, b axles and C-axis component, isa、isbAnd iscRespectively threephase stator current phasor IsabcA axles, b axles and c-axis component.
The numerical value that the step 2 is obtained by fixed 50Hz frequency integrators obtains virtualphase parallactic angle θ with respect to 2 π remainders0, Virtualphase parallactic angle θ0Be be 20 milliseconds in the cycle, the sawtooth signal that amplitude is 2 π, be shown below：
θ0The π f of=∫ 20dt
Wherein：f0=50Hz is fixed rotation angular frequency.
The step 2 is according to following formula to stator voltage vector UsαβWith stator current vector IsαβCarry out Park conversion：
Wherein：usdAnd usqRespectively stator voltage vector UsdqD axis components and q axis components, isdAnd isqRespectively stator Current phasor IsdqD axis components and q axis components, usαAnd usβRespectively stator voltage vector Usαβα axis components and beta -axis component, isαAnd isβRespectively stator current vector Isαβα axis components and beta -axis component, θ0For virtualphase parallactic angle.
The step 3 calculates the stator current I of double fed induction generators according to following formulasdqD axles and q axles instruction isd.refWith isq.ref：
Wherein：usdAnd usqRespectively stator voltage vector UsdqD axis components and q axis components, Ps.refAnd Qs.refFor double-fed Influence generator stator active and reactive power is instructed.
The step 4 calculates rotor voltage by regulating error decoupling compensation algorithm and instructs Urdq, step is as follows：
Step 4-1：D axles and q axles the instruction i of double fed induction generators stator currentsd.refAnd isq.refReality is individually subtracted The stator current vector I of measurementsdqD axles and q axis components isdAnd isq, obtain the error letter of double fed induction generators stator current Number Δ isdWith Δ isq；
Step 4-2：According to the error signal Δ i of double fed induction generators stator currentsdWith Δ isq, calculate virtual synchronous Voltage-regulation vector v' under rotating coordinate systemrdq；
Step 4-3：To voltage-regulation vector v'rdqVoltage decoupling compensation is carried out, is obtained under virtual synchronous rotating coordinate system Rotor voltage instructs Urdq。
Double fed induction generators simulation result figure is illustrated in figure 2, wherein, figure (d) is in virtual synchronous rotating coordinate system Stator current d axis components and its corresponding error simulation result figure, figure (e) are stator current q in virtual synchronous rotating coordinate system Axis component and its corresponding error simulation result figure.
The step 4-2 is according to following formula to stator current error signal delta isdWith Δ isqCarry out complex coefficient proportional, integral tune Section：
Wherein：v'rdAnd v'rqRespectively voltage-regulation vector v'rdqD axis components and q axis components, KpFor proportionality coefficient, Ki For integral coefficient, ω0=2 π f0=100 π are virtual angular velocity of rotation, and s is Laplace operator.
The step 4-3 is according to following formula to voltage-regulation vector v'rdqCarry out decoupling compensation：
Wherein：usdAnd usqRespectively stator voltage vector UsdqD axis components and q axis components, erdAnd erqRespectively voltage Decouple vector erdqD axis components and q axis components, ψsdAnd ψsqRespectively stator voltage vector ψsdqD axis components and q axis components, v'rdAnd v'rqRespectively voltage-regulation vector v'rdqD axis components and q axis components, urdAnd urqRespectively rotor voltage instruction Urdq D axis components and q axis components, LrFor the inductor rotor of double fed induction generators, LmIt is mutual for the rotor of double fed induction generators Sense, ωrThe angular rate rotated for double fed induction generators rotor.
Described step 5 instructs U according to following formula to double fed induction generators rotor voltagerdqCarry out Park inverse transformations：
Wherein：urdAnd urqRespectively rotor voltage instruction UrdqD axis components and q axis components, urαAnd urβRespectively rotor Voltage instruction Urαβα axis components and beta -axis component.
The present invention provides a kind of no phase-locked loop current control device of double fed induction generators, as shown in figure 1, described device Including：Acquisition module, the parameter for gathering double fed induction generators；
Clarke conversion modules 6, carry out Clarke conversion for the parameter to collection, obtain the static alpha-beta coordinate system of two-phase Under stator voltage vector UsαβWith stator current vector Isαβ；
Parker conversion modules 7, for stator voltage vector UsαβWith stator current vector IsαβPark conversion is carried out, is obtained Stator voltage vector U under to virtual synchronous rotating coordinate systemsdqWith stator current vector Isdq；
Stator current command configuration module 9, the stator current I for calculating double fed induction generatorssdqD axles and q axles refer to Make isd.refAnd isq.ref；
Rotor voltage instructs configuration module, for calculating the instruction of the rotor voltage under virtual synchronous rotating coordinate system Urdq；
Parker inverse transform blocks 12, for instructing U to double fed induction generators rotor voltagerdqPark inverse transformations are carried out, Obtain the rotor voltage instruction U under the static alpha-beta coordinate system of two-phaserαβ；
Space vector adjustment module 13, for instructing U according to the rotor voltagerαβGenerate one group of pwm signal.
The Clarke conversion modules 6 are connected with Parker conversion modules 7；
The stator current command configuration module 9, rotor voltage instruction configuration module, Parker inverse transform blocks 12 and sky Between vector adjustment module 13 be sequentially connected.
The rotor voltage instruction configuration module includes stator current closed loop adjustment module 10 and stator current decoupling compensation Module 11.
Stator current closed loop adjustment module 10, for the error signal Δ i to double fed induction generators stator currentsdAnd Δ isqComplex coefficient proportional, integral regulation is carried out, the voltage-regulation vector v' under virtual synchronous rotating coordinate system is obtainedrdq；
Stator current decoupling compensation module 11, for voltage-regulation vector v'rdqCarry out decoupling compensation；
The power level voltage source type 3-phase power converter 4 of space vector adjustment module 13 and two is connected, space vector regulation mould One group of pwm signal S that block 13 is generateda、SbAnd ScFor being controlled to two power level voltage source type 3-phase power converters 4；
The Parker conversion modules 7 are connected with virtualphase parallactic angle configuration module 14, the virtualphase parallactic angle configuration module 14 are used to calculate virtualphase parallactic angle θ0；
Described device includes the angular rate ω that photoelectric encoder module 5 is used to measure rotor rotationr, photoelectric encoder mould Block 5 generates rotor position angle θ with being used forrIncrement type integrator 8 connect, the increment type integrator 8 and Parker inverse transformations Module 12 is connected.
The Clarke conversion modules 6 are respectively with being that voltage sensor module 2 and current sensor module 3 are connected；
The voltage sensor module 2 includes three voltage sensors, and it is three electricity that the current sensor module 3, which includes, Flow sensor.
Finally it should be noted that：Above example is merely to illustrate technical scheme rather than to its protection domain Limitation, although the application is described in detail with reference to above-described embodiment, those of ordinary skill in the art should Understand：Those skilled in the art read after the application the embodiment of application can still be carried out a variety of changes, modification or Person's equivalent substitution, but these changes, modification or equivalent substitution, are applying within pending claims.

Claims (13)

1. the no phase-locked loop current control method of a kind of double fed induction generators, it is characterised in that methods described includes following step Suddenly：
Step 1：The parameter of double fed induction generators is gathered, coordinate transform is carried out to the parameter, obtained under static alpha-beta coordinate system Stator voltage vector UsαβWith stator current vector Isαβ；
Step 2：According to virtualphase parallactic angle θ0To stator voltage vector UsαβWith stator current vector IsαβCoordinate transform is carried out, is obtained Stator voltage vector U under virtual synchronous rotating coordinate systemsdqWith stator current vector Isdq；
Step 3：Calculate the stator current vector I of double fed induction generatorssdqD, q axle instruction；
Step 4：Value of feedback with actual measurement is instructed according to double fed induction generators stator current d, q axle, virtual synchronous is calculated Rotor voltage instruction U under rotating coordinate systemrdq；
Step 5：U is instructed to rotor voltagerdqCoordinate inverse transformation is carried out, the rotor electricity under the static alpha-beta coordinate system of rotor two-phase is obtained Pressure instruction Urαβ；
Step 6：U is instructed according to the rotor voltagerαβ, rotor current transformer of the one group of pwm signal of generation to double fed induction generators It is controlled.
2. the no phase-locked loop current control method of double fed induction generators according to claim 1, it is characterised in that described The parameter that step 1 is gathered includes the threephase stator voltage vector U of double fed induction generatorssabc, threephase stator current phasor Isabc、 The angular rate ω of rotor rotationrAnd rotor position angle θr。
3. the no phase-locked loop current control method of double fed induction generators according to claim 2, it is characterised in that described Step 1 is according to following formula to the threephase stator voltage vector UsabcWith threephase stator current phasor IsabcCarry out coordinate transform：
<mrow> <msub> <mi>U</mi> <mrow> <mi>s</mi> <mi>&amp;alpha;</mi> <mi>&amp;beta;</mi> </mrow> </msub> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>&amp;alpha;</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>&amp;beta;</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfrac> <mn>2</mn> <mn>3</mn> </mfrac> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mn>1</mn> </mtd> <mtd> <mrow> <mo>-</mo> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> </mrow> </mtd> <mtd> <mrow> <mo>-</mo> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> </mrow> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> <mtd> <mfrac> <msqrt> <mn>3</mn> </msqrt> <mn>2</mn> </mfrac> </mtd> <mtd> <mrow> <mo>-</mo> <mfrac> <msqrt> <mn>3</mn> </msqrt> <mn>2</mn> </mfrac> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>&amp;CenterDot;</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>a</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>b</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>c</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> </mrow>
<mrow> <msub> <mi>I</mi> <mrow> <mi>s</mi> <mi>&amp;alpha;</mi> <mi>&amp;beta;</mi> </mrow> </msub> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>&amp;alpha;</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>&amp;beta;</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfrac> <mn>2</mn> <mn>3</mn> </mfrac> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mn>1</mn> </mtd> <mtd> <mrow> <mo>-</mo> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> </mrow> </mtd> <mtd> <mrow> <mo>-</mo> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> </mrow> </mtd> </mtr> <mtr> <mtd> <mn>0</mn> </mtd> <mtd> <mfrac> <msqrt> <mn>3</mn> </msqrt> <mn>2</mn> </mfrac> </mtd> <mtd> <mrow> <mo>-</mo> <mfrac> <msqrt> <mn>3</mn> </msqrt> <mn>2</mn> </mfrac> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>&amp;CenterDot;</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>a</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>b</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>c</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> </mrow>
Wherein：usαAnd usβRespectively stator voltage vector Usαβα axis components and beta -axis component, isαAnd isβRespectively stator current Vector Isαβα axis components and beta -axis component, usa、usbAnd uscRespectively threephase stator voltage vector UsabcA axles, b axles and c-axis Component, isa、isbAnd iscRespectively threephase stator current phasor IsabcA axles, b axles and c-axis component.
4. the no phase-locked loop current control method of double fed induction generators according to claim 1, it is characterised in that described Virtualphase parallactic angle θ is calculated as follows in step 20：
θ0The π f of=∫ 20dt
Wherein：f0=50Hz is fixed rotation angular frequency, virtualphase parallactic angle θ0Be be 20 milliseconds in the cycle, the sawtooth waveforms that amplitude is 2 π Signal.
5. the no phase-locked loop current control method of double fed induction generators according to claim 1, it is characterised in that described Step 2 is as the following formula to stator voltage vector UsαβWith stator current vector IsαβCarry out coordinate transform：
<mrow> <msub> <mi>U</mi> <mrow> <mi>s</mi> <mi>d</mi> <mi>q</mi> </mrow> </msub> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>d</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>q</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mrow> <msub> <mi>cos&amp;theta;</mi> <mn>0</mn> </msub> </mrow> </mtd> <mtd> <mrow> <msub> <mi>sin&amp;theta;</mi> <mn>0</mn> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>-</mo> <msub> <mi>sin&amp;theta;</mi> <mn>0</mn> </msub> </mrow> </mtd> <mtd> <mrow> <msub> <mi>cos&amp;theta;</mi> <mn>0</mn> </msub> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>&amp;CenterDot;</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>&amp;alpha;</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>&amp;beta;</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> </mrow> 1
<mrow> <msub> <mi>I</mi> <mrow> <mi>s</mi> <mi>d</mi> <mi>q</mi> </mrow> </msub> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>d</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>q</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mrow> <msub> <mi>cos&amp;theta;</mi> <mn>0</mn> </msub> </mrow> </mtd> <mtd> <mrow> <msub> <mi>sin&amp;theta;</mi> <mn>0</mn> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mo>-</mo> <msub> <mi>sin&amp;theta;</mi> <mn>0</mn> </msub> </mrow> </mtd> <mtd> <mrow> <msub> <mi>cos&amp;theta;</mi> <mn>0</mn> </msub> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>&amp;CenterDot;</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>&amp;alpha;</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>&amp;beta;</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> </mrow>
Wherein：usdAnd usqRespectively stator voltage vector UsdqD axis components and q axis components, isdAnd isqRespectively stator current Vector IsdqD axis components and q axis components, usαAnd usβRespectively stator voltage vector Usαβα axis components and beta -axis component, isαWith isβRespectively stator current vector Isαβα axis components and beta -axis component, θ0For virtualphase parallactic angle.
6. the no phase-locked loop current control method of double fed induction generators according to claim 1, it is characterised in that described The stator current I of double fed induction generators is calculated as follows in step 3sdqD axles and q axles instruction isd.refAnd isq.ref：
<mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>d</mi> <mo>.</mo> <mi>r</mi> <mi>e</mi> <mi>f</mi> </mrow> </msub> <mo>=</mo> <mn>0.667</mn> <mfrac> <mrow> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>d</mi> </mrow> </msub> <msub> <mi>P</mi> <mrow> <mi>s</mi> <mo>.</mo> <mi>r</mi> <mi>e</mi> <mi>f</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>q</mi> </mrow> </msub> <msub> <mi>Q</mi> <mrow> <mi>s</mi> <mo>.</mo> <mi>r</mi> <mi>e</mi> <mi>f</mi> </mrow> </msub> </mrow> <mrow> <msup> <mrow> <mo>(</mo> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>d</mi> </mrow> </msub> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>+</mo> <msup> <mrow> <mo>(</mo> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>q</mi> </mrow> </msub> <mo>)</mo> </mrow> <mn>2</mn> </msup> </mrow> </mfrac> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>i</mi> <mrow> <mi>s</mi> <mi>q</mi> <mo>.</mo> <mi>r</mi> <mi>e</mi> <mi>f</mi> </mrow> </msub> <mo>=</mo> <mn>0.667</mn> <mfrac> <mrow> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>q</mi> </mrow> </msub> <msub> <mi>P</mi> <mrow> <mi>s</mi> <mo>.</mo> <mi>r</mi> <mi>e</mi> <mi>f</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>d</mi> </mrow> </msub> <msub> <mi>Q</mi> <mrow> <mi>s</mi> <mo>.</mo> <mi>r</mi> <mi>e</mi> <mi>f</mi> </mrow> </msub> </mrow> <mrow> <msup> <mrow> <mo>(</mo> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>d</mi> </mrow> </msub> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>+</mo> <msup> <mrow> <mo>(</mo> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>q</mi> </mrow> </msub> <mo>)</mo> </mrow> <mn>2</mn> </msup> </mrow> </mfrac> </mrow> </mtd> </mtr> </mtable> </mfenced>
Wherein：usdAnd usqRespectively stator voltage vector UsdqD axis components and q axis components, Ps.refAnd Qs.refFor double-fed induction Generator unit stator active and reactive power is instructed.
7. the no phase-locked loop current control method of double fed induction generators according to claim 1, it is characterised in that described Step 4 calculates rotor voltage instruction U with regulating error decoupling compensation algorithmrdq, comprise the following steps：
Step 4-1：With the d axles and the instruction i of q axles of double fed induction generators stator currentsd.refAnd isq.refReality is individually subtracted The d axles and q axis components i of the stator current of measurementsdAnd isq, calculate the error signal Δ i of double fed induction generators stator currentsd With Δ isq；
Step 4-2：According to the error signal Δ i of double fed induction generators stator currentsdWith Δ isq, calculate virtual synchronous rotation and sit Voltage-regulation vector v' under mark systemrdq；
Step 4-3：To voltage-regulation vector v'rdqVoltage decoupling compensation is carried out, the rotor under virtual synchronous rotating coordinate system is obtained Voltage instruction Urdq。
8. the no phase-locked loop current control method of double fed induction generators according to claim 7, it is characterised in that described Step 4-2 voltage-regulation vectors v'rdqIn the component and the component v' of q axles of d axlesrdAnd v'rqIt is shown below：
<mrow> <mtable> <mtr> <mtd> <mrow> <msubsup> <mi>v</mi> <mrow> <mi>r</mi> <mi>d</mi> </mrow> <mo>&amp;prime;</mo> </msubsup> <mo>=</mo> <msub> <mi>C</mi> <mi>R</mi> </msub> <mrow> <mo>(</mo> <mi>s</mi> <mo>)</mo> </mrow> <msub> <mi>&amp;Delta;i</mi> <mrow> <mi>s</mi> <mi>d</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>C</mi> <mi>I</mi> </msub> <mrow> <mo>(</mo> <mi>s</mi> <mo>)</mo> </mrow> <msub> <mi>&amp;Delta;i</mi> <mrow> <mi>s</mi> <mi>q</mi> </mrow> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msubsup> <mi>v</mi> <mrow> <mi>r</mi> <mi>q</mi> </mrow> <mo>&amp;prime;</mo> </msubsup> <mo>=</mo> <msub> <mi>C</mi> <mi>R</mi> </msub> <mrow> <mo>(</mo> <mi>s</mi> <mo>)</mo> </mrow> <msub> <mi>&amp;Delta;i</mi> <mrow> <mi>s</mi> <mi>q</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>C</mi> <mi>I</mi> </msub> <mrow> <mo>(</mo> <mi>s</mi> <mo>)</mo> </mrow> <msub> <mi>&amp;Delta;i</mi> <mrow> <mi>s</mi> <mi>d</mi> </mrow> </msub> </mrow> </mtd> </mtr> </mtable> <mo>,</mo> </mrow>
<mrow> <msub> <mi>C</mi> <mi>R</mi> </msub> <mrow> <mo>(</mo> <mi>s</mi> <mo>)</mo> </mrow> <mo>=</mo> <msub> <mi>K</mi> <mi>p</mi> </msub> <mo>+</mo> <mfrac> <msub> <mi>K</mi> <mi>i</mi> </msub> <mi>s</mi> </mfrac> </mrow>
<mrow> <msub> <mi>C</mi> <mi>I</mi> </msub> <mrow> <mo>(</mo> <mi>s</mi> <mo>)</mo> </mrow> <mo>=</mo> <mfrac> <mrow> <msub> <mi>K</mi> <mi>p</mi> </msub> <msub> <mi>&amp;omega;</mi> <mn>0</mn> </msub> </mrow> <mi>s</mi> </mfrac> </mrow>
Wherein：KpFor proportionality coefficient, KiFor integral coefficient, ω0=2 π f0=100 π are virtual angular velocity of rotation, and s is Laplce Operator.
9. the no phase-locked loop current control method of double fed induction generators according to claim 7, it is characterised in that described Rotor voltage instruction Us of the step 4-3 according to following formulardqTo voltage-regulation vector v'rdqCarry out decoupling compensation：
<mrow> <msub> <mi>U</mi> <mrow> <mi>r</mi> <mi>d</mi> <mi>q</mi> </mrow> </msub> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>r</mi> <mi>d</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>r</mi> <mi>q</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mrow> <msubsup> <mi>v</mi> <mrow> <mi>r</mi> <mi>d</mi> </mrow> <mo>&amp;prime;</mo> </msubsup> <mo>+</mo> <msub> <mi>e</mi> <mrow> <mi>r</mi> <mi>d</mi> </mrow> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msubsup> <mi>v</mi> <mrow> <mi>r</mi> <mi>q</mi> </mrow> <mo>&amp;prime;</mo> </msubsup> <mo>+</mo> <msub> <mi>e</mi> <mrow> <mi>r</mi> <mi>q</mi> </mrow> </msub> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>,</mo> </mrow>
<mrow> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>e</mi> <mrow> <mi>r</mi> <mi>d</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>e</mi> <mrow> <mi>r</mi> <mi>q</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfrac> <msub> <mi>L</mi> <mi>r</mi> </msub> <msub> <mi>L</mi> <mi>m</mi> </msub> </mfrac> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>d</mi> </mrow> </msub> <mo>+</mo> <msub> <mi>&amp;omega;</mi> <mi>r</mi> </msub> <msub> <mi>&amp;psi;</mi> <mrow> <mi>s</mi> <mi>q</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>u</mi> <mrow> <mi>s</mi> <mi>q</mi> </mrow> </msub> <mo>-</mo> <msub> <mi>&amp;omega;</mi> <mi>r</mi> </msub> <msub> <mi>&amp;psi;</mi> <mrow> <mi>s</mi> <mi>d</mi> </mrow> </msub> </mrow> </mtd> </mtr> </mtable> </mfenced> </mrow>
Wherein：usdAnd usqRespectively stator voltage vector UsdqD axis components and q axis components, erdAnd erqRespectively voltage decoupling Vector erdqD axis components and q axis components, ψsdAnd ψsqRespectively stator voltage vector ψsdqD axis components and q axis components, v'rd And v'rqRespectively voltage-regulation vector v'rdqD axis components and q axis components, urdAnd urqRespectively rotor voltage instruction UrdqD Axis component and q axis components, LrFor the inductor rotor of double fed induction generators, LmFor the rotor mutual inductance of double fed induction generators, ωrThe angular rate rotated for double fed induction generators rotor.
10. the no phase-locked loop current control method of double fed induction generators according to claim 1, it is characterised in that institute The step 5 stated instructs U according to following formula to double fed induction generators rotor voltagerdqCarry out coordinate transform：
<mrow> <msub> <mi>U</mi> <mrow> <mi>r</mi> <mi>&amp;alpha;</mi> <mi>&amp;beta;</mi> </mrow> </msub> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>r</mi> <mi>&amp;alpha;</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>r</mi> <mi>&amp;beta;</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <mrow> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <msub> <mi>&amp;theta;</mi> <mn>0</mn> </msub> <mo>-</mo> <msub> <mi>&amp;theta;</mi> <mi>r</mi> </msub> <mo>)</mo> </mrow> </mrow> </mtd> <mtd> <mrow> <mo>-</mo> <mi>s</mi> <mi>i</mi> <mi>n</mi> <mrow> <mo>(</mo> <msub> <mi>&amp;theta;</mi> <mn>0</mn> </msub> <mo>-</mo> <msub> <mi>&amp;theta;</mi> <mi>r</mi> </msub> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>s</mi> <mi>i</mi> <mi>n</mi> <mrow> <mo>(</mo> <msub> <mi>&amp;theta;</mi> <mn>0</mn> </msub> <mo>-</mo> <msub> <mi>&amp;theta;</mi> <mi>r</mi> </msub> <mo>)</mo> </mrow> </mrow> </mtd> <mtd> <mrow> <mi>cos</mi> <mrow> <mo>(</mo> <msub> <mi>&amp;theta;</mi> <mn>0</mn> </msub> <mo>-</mo> <msub> <mi>&amp;theta;</mi> <mi>r</mi> </msub> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> </mtable> </mfenced> <mfenced open = "[" close = "]"> <mtable> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>r</mi> <mi>d</mi> </mrow> </msub> </mtd> </mtr> <mtr> <mtd> <msub> <mi>u</mi> <mrow> <mi>r</mi> <mi>q</mi> </mrow> </msub> </mtd> </mtr> </mtable> </mfenced> </mrow>
Wherein：urdAnd urqRespectively rotor voltage instruction UrdqD axis components and q axis components, urαAnd urβRespectively rotor voltage Instruct Urαβα axis components and beta -axis component.
11. the no phase-locked loop current control device of a kind of double fed induction generators, it is characterised in that described device includes：Collection Module, the parameter for gathering double fed induction generators；
First coordinate transformation module, for the threephase stator voltage vector U to collectionsabcWith threephase stator current phasor IsabcEnter Row coordinate transform, obtains the stator voltage vector U under the static alpha-beta coordinate system of two-phasesαβWith stator current vector Isαβ；
Second coordinate transformation module, for stator voltage vector UsαβWith stator current vector IsαβCoordinate transform is carried out, is obtained Stator voltage vector U under virtual synchronous rotating coordinate systemsdqWith stator current vector Isdq；
Stator current command configuration module, the stator current I for calculating double fed induction generatorssdqD axles and q axles instruction isd.refAnd isq.ref；
Rotor voltage instructs configuration module, for calculating the instruction of the rotor voltage under virtual synchronous rotating coordinate system Urdq；
3rd coordinate transformation module, for instructing U to double fed induction generators rotor voltagerdqCoordinate transform is carried out, two-phase is obtained Rotor voltage instruction U under static alpha-beta coordinate systemrαβ；
Space vector adjustment module, for instructing U according to the rotor voltagerαβGenerate one group of pwm signal.
12. no phase-locked loop current control device as claimed in claim 11, it is characterised in that
First coordinate transformation module is connected with the second coordinate transformation module；
The stator current command configuration module, rotor voltage instruction configuration module, the 3rd coordinate transformation module and space vector Adjustment module is sequentially connected.
13. the no phase-locked loop current control device of double fed induction generators as claimed in claim 11, it is characterised in that described Rotor voltage instruction configuration module includes stator current closed loop adjustment module and stator current decoupling compensation module.
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CN111654062A (en) * 2020-08-04 2020-09-11 中国电力科学研究院有限公司 Virtual synchronization control method and system of double-fed wind generating set
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