CN117578632A - Double-fed voltage source wind turbine generator system rotation speed-inertia combination control method - Google Patents
Double-fed voltage source wind turbine generator system rotation speed-inertia combination control method Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
- G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
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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
- H02P21/18—Estimation of position or speed
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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
- H02P21/20—Estimation of torque
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Engineering & Computer Science (AREA)
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- Electromagnetism (AREA)
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Abstract
The invention provides a doubly-fed voltage source wind turbine generator rotating speed-inertia combination control method, which comprises voltage source active power control and voltage source reactive power control of a rotor side converter, wherein the active power control specifically comprises six sub-module control items, namely a rotating speed direct control outer ring, a rotating speed-MPPT switching control module, a rotating speed limiting control module, a virtual rotor motion equation module, a virtual inertia switching control module and a slip angle calculation module. The invention provides a rotating speed direct control outer ring and a rotating speed limiting control module, which realize the direct control function of the rotating speed, realize the switching between the direct rotating speed control and the MPPT control through a rotating speed-MPPT switching control module, and realize the switching without inertia response through a virtual inertia switching control module; thus four different combined control modes can be realized comprehensively.
Description
Technical Field
The invention belongs to the technical field of power control, and particularly relates to a doubly-fed voltage source wind turbine generator set rotation speed-inertia combination control method.
Background
Compared with the traditional synchronous generator, the large-scale wind generating set is connected to the power grid through the converter and has the advantages of flexible control, quick response and the like. In a Doubly-fed wind turbine generator (double-fed Induction Generator, DFIG), a stator is directly connected with a power grid, and a rotor realizes alternating-current excitation through a three-phase-direct-alternating current transformer; the electric power is exchanged with the power grid through the stator and the rotor. The existing control of the doubly-fed voltage source wind turbine generator set generally adopts a combined control technical scheme of rotor side converter virtual synchronous control and network side converter inertial synchronous control.
In the existing control mode of the doubly-fed voltage source wind turbine generator, the torque of the wind turbine generator is used as a controlled object, so that the power external characteristic of the wind turbine generator is close to that of a traditional synchronous generator. However, the control method has the defects that: the rotation speed of the voltage source wind turbine cannot be directly controlled. The input of the active control loop simulating the motion equation of the synchronous generator rotor is a given value of an electromagnetic torque signal, so that the non-difference tracking control of the electromagnetic torque can be realized only in the control process, and the actual rotating speed of the wind turbine generator cannot be controlled.
In a scene with higher requirements on the rotational speed control precision of the wind turbine, the steady-state operation of the wind turbine is seriously affected by the lack of a rotational speed direct control strategy, so that a rotational speed direct control method of the doubly-fed voltage source wind turbine is purposefully provided on the basis of virtual inertia control of a voltage source, the combination of rotational speed control and inertia control of the wind turbine is realized, and the controllability of the doubly-fed wind turbine is further improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a doubly-fed voltage source wind turbine generator system rotating speed-inertia combination control method, which is used for solving the problem that the current doubly-fed voltage source wind turbine generator system cannot realize direct control of the rotating speed.
The present invention achieves the above technical object by the following technical means.
A double-fed voltage source wind turbine generator system rotation speed-inertia combination control method comprises the following steps: the active power control of the voltage source of the rotor-side converter comprises the following steps:
the rotation speed directly controls the outer ring: given rotation speed omega of wind turbine generator r * And actual rotation speed omega r The difference is input into a PI controller to obtain a torque output given T of a rotating speed outer ring ωr * ；
When the direct control of the rotating speed is executed, let T set ＝T ωr * ；
The rotating speed limiting control module: actual rotation speed omega of wind turbine generator r And rated maximum rotation speed omega rmax The difference is input into a PI controller to obtain T e1 * The upper limit of the PI controller is the rated maximum electromagnetic torque T of the wind turbine generator max The lower limit is T set The method comprises the steps of carrying out a first treatment on the surface of the Actual rotation speed omega of wind turbine generator r And rated minimum rotational speed omega rmin The difference is input into a PI controller to obtain T e2 * Wherein the upper limit of the PI controller is T set The lower limit is 0; given value T of electromagnetic torque of wind turbine generator e * The method comprises the following steps:
wherein omega rmid ＝(ω rmin +ω rmax )/2。
Further, a rotation speed-MPPT switching control module is provided for switching the T set Wherein, when performing MPPT control, let T set ＝k opt ω r 2 ；k opt ω r 2 For optimum torque setting, k opt Is the optimal torque coefficient.
Further, in the active power control of the voltage source, T e * Obtaining the torque angular velocity omega through a virtual rotor motion equation module Te1 And will omega Te1 Substituting the slip angle to calculate to obtain a slip angle theta slip 。
Further, a virtual inertia switching control module is provided in the active power control of the voltage source, and is configured to control whether the switching performs virtual inertia response, where:
when the virtual inertia response is not performed, the power grid frequency omega is obtained g As output signal omega Te2 ；
When virtual inertia response is carried out, the damping frequency omega of the power grid is reduced g_damp As output signal omega Te2 ；
In the slip angle calculation, ω is first calculated Te1 And omega Te2 Summing to obtain virtual synchronous angular velocity omega vsg Thereafter ω vsg Input integrator omega b And/s to obtain a virtual rotor angle theta vsg Finally, theta is set vsg Angle theta with rotor r Difference is made to obtain the slip angle theta slip 。
Further, the rotor angle θ r From the actual rotational speed omega of the wind turbine r Input integrator omega b /s is obtained。
Further, the grid damping frequency ω g_damp From omega g Input first order inertial module 1/k c And solving for s+1.
Further, the method also comprises voltage source reactive power control of the rotor side converter, and the voltage source reactive power control is used for controlling reactive power of the stator side of the wind turbine, so that unit power factor operation of the wind turbine is realized.
Further, in the voltage source reactive power control, the given value psi of the d-axis component of the rotor flux linkage rd * And the actual value psi rd The difference is input into a PI controller to obtain an input U of the reverse coordinate transformation md The method comprises the steps of carrying out a first treatment on the surface of the Given value psi of rotor flux linkage q-axis component rq * And the actual value psi rq The difference is input to a PI controller to obtain an input U of the reverse coordinate transformation mq ；
Finally, U is set md 、U mq And theta slip Inputting the inverse coordinate transformation, inputting the transformation result into a SVPWM module, and generating a pulse control signal S rabc And controlling the operation of the rotor-side converter.
Further, rotor current I r Based on slip angle theta slip Coordinate system conversion from abc to dq is carried out, and the actual d-axis component psi of the generator rotor flux is obtained through flux linkage calculation rd And the q-axis component actual value ψ rq 。
Further, the given value ψ of the d-axis component of the rotor flux linkage rd * From a given value Q of stator-side reactive power s * And the actual value Q s The difference is input to the PI controller
The beneficial effects of the invention are as follows:
(1) The invention provides a doubly-fed voltage source wind turbine generator rotating speed-inertia combination control method, which can effectively realize direct control of rotating speed.
(2) The conventional MPPT control link is reserved, the rotation speed direct control and the MPPT control can be freely switched according to actual control requirements, and the application range of a control strategy is expanded. And whether inertia response control is added can be realized, and four different combination control modes can be comprehensively realized.
Drawings
FIG. 1 is a control block diagram overview of a doubly-fed voltage source wind turbine control method of the present invention;
FIG. 2 is a control block diagram of the active power of the voltage source according to the present invention;
FIG. 3 is a control block diagram of the outer ring and the switching module for directly controlling the rotation speed in the present invention;
FIG. 4 is a control block diagram of a speed limit control module according to the present invention;
FIG. 5 is a control block diagram of other sub-modules in active power control of the voltage source of the present invention;
FIG. 6 is a control block diagram of the reactive power of the voltage source in the present invention;
FIG. 7 is a diagram of a simulation model constructed by testing;
FIG. 8 is a graph comparing generator speeds with or without inertia response in MPPT control mode;
FIG. 9 is a graph comparing electromagnetic torque with inertia response in MPPT control mode;
FIG. 10 is a graph comparing generator speeds with inertia response in a speed direct control mode;
fig. 11 is a graph showing electromagnetic torque contrast with inertia response in the rotation speed direct control mode.
Detailed Description
Embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
1. Control frame
As shown in fig. 1, the rotational speed-inertia combination control method for the doubly-fed voltage source wind turbine generator comprises two parts, namely (1) active power control of a voltage source and (2) reactive power control of the voltage source of a rotor-side converter (RSC). The active power control of the voltage source is used for controlling the rotating speed and the active power of the wind turbine generator, and the combined control of the rotating speed control and the inertia response control is realized. (2) The voltage source reactive power control is used for controlling reactive power of the stator side of the wind turbine generator and realizing unit power factor operation of the wind turbine generator.
As shown in fig. 2, the active power control of the voltage source of the present invention specifically includes the following 6 sub-module control items: the device comprises an outer ring (1) directly controlled by the rotating speed, (2) a rotating speed-MPPT switching control module, (3) a rotating speed limiting control module, (4) a virtual rotor motion equation module, (5) a virtual inertia switching control module and (6) a slip angle calculation module.
As shown in fig. 3:
(1) In the outer ring of the direct control of the rotation speed, the given rotation speed omega of the wind turbine generator is controlled r * Actual rotational speed ω of wind turbine generator system r The difference is obtained, and then the rotation speed difference is input into a PI controller to obtain a torque output given T of a rotation speed outer ring ωr * 。
(2) The rotation speed-MPPT switching control module is provided with a signal change-over switch, namely 'input selection 1' in the illustration, for selecting one of the two input signals as an output signal T set . The two input signals of selection input 1 are respectively T ωr * And an optimal torque given k opt ω r 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein k is opt Is the optimal torque coefficient. The selection input 1 specifically selects which signal output is specified by the person. Wherein when the direct control of the rotational speed is required to be performed, then T is selected ωr * As an output signal; otherwise, when MPPT control needs to be executed, k is selected opt ω r 2 As an output signal.
As shown in fig. 4:
(3) The rotational speed limit control module is:
on the one hand, the actual rotation speed omega of the wind turbine generator system r And rated maximum rotation speed omega rmax The difference is input into a PI controller to obtain T e1 * The method comprises the steps of carrying out a first treatment on the surface of the Wherein the upper limit of the PI controller is the rated maximum electromagnetic torque T of the wind turbine generator max The lower limit is T set 。
On the other hand, the actual rotational speed ω of the wind turbine r And rating ofMinimum rotational speed omega rmin The difference is input into a PI controller to obtain T e2 * The method comprises the steps of carrying out a first treatment on the surface of the Wherein the upper limit of the PI controller is T set The lower limit is 0.
Finally, according to ω r At T e1 * And T is e2 * Alternatively as output signal T e * ：
Wherein T is e * For the given value omega of the electromagnetic torque of the wind turbine rmid ＝(ω rmin +ω rmax )/2。
As shown in fig. 5:
(4) In the virtual rotor motion equation module, a given value T of electromagnetic torque of a wind turbine generator set e * And the actual value T e Making a difference to obtain a torque difference DeltaT e . After which the torque difference DeltaT e The difference between the virtual inertia deviation delta D and the virtual inertia deviation delta D is input into an integrator 1/2H vsg s, obtaining the torque angular velocity omega Te1 . Angular velocity of torque omega Te1 On the one hand as output signal of the virtual rotor equation of motion module and on the other hand as feedback signal multiplied by the virtual inertia coefficient D vsg The virtual inertia deviation Δd is obtained.
(5) In the virtual inertia switching control module, a signal change-over switch, i.e. "input select 2" in the illustration, is provided for selecting one of the two input signals as the output signal ω Te2 . The two input signals of input selection 2 are respectively the power grid damping frequency omega g_damp And grid frequency omega g The method comprises the steps of carrying out a first treatment on the surface of the Wherein the grid damping frequency omega g_damp By the grid frequency omega g Input first order inertial module 1/k c And solving for s+1. The selection input 2 specifically selects which signal output is specified by the person. Wherein ω is selected when an inertia response is desired g_damp As an output signal; whereas if no inertia response is required, ω is selected g As an output signal.
Will omega Te1 And omega Te2 Summing to obtain virtual synchronous angular velocity omega vsg 。
(6) In the slip angle calculation module, first virtually synchronize the angular velocity ω vsg Input integrator omega b And/s to obtain a virtual rotor angle theta vsg The method comprises the steps of carrying out a first treatment on the surface of the Integrator omega b Omega in/s b Representing the grid reference frequency. Then the virtual rotor angle theta vsg Angle theta with rotor r Difference is made to obtain the slip angle theta slip The method comprises the steps of carrying out a first treatment on the surface of the Wherein the rotor angle theta r From the actual rotational speed omega of the wind turbine r Input integrator omega b And/s.
As shown in fig. 1, the slip angle θ obtained based on the above-described voltage source active power control slip Rotor current I r Converting coordinate system of abc to dq, and calculating to obtain d-axis component psi of generator rotor flux linkage rd And q-axis component ψ rq 。
As shown in fig. 6, in the reactive power control of the voltage source of the present invention:
set value Q of stator side reactive power s * And the actual value Q s The difference is input into a PI controller to obtain a given value psi of the d-axis component of the rotor flux linkage rd * . Given value psi of d-axis component of rotor flux linkage rd * And the actual value psi rd The difference is input into a PI controller to obtain an input U of the reverse coordinate transformation md 。
Given value psi of rotor flux linkage q-axis component rq * And the actual value psi rq The difference is input to a PI controller to obtain an input U of the reverse coordinate transformation mq 。
Finally, U is set md 、U mq And theta slip Inputting the inverse coordinate transformation, inputting the transformation result into a SVPWM module, and generating a pulse control signal S rabc And controlling the operation of the rotor-side converter.
According to the control method provided by the invention, on one hand, the rotating speed of the doubly-fed voltage source wind turbine generator can be directly controlled. On the other hand, the switching of two modes of the direct control of the rotating speed and the MPPT maximum power tracking control can be realized through the rotating speed-MPPT switching control module, and whether the virtual inertia control is started or not can be realized through the virtual inertia switching control module; the MPPT control and inertia-free response (1) can be realized; (2) MPPT control + inertia response; (3) the rotation speed is directly controlled and no inertia response is generated; (4) speed direct control and inertia response four different control effects
2. Testing
And constructing a 2MW double-fed wind turbine generator grid-connected model for simulation test as shown in FIG. 7. The relevant parameter settings are shown in tables 1 and 2 below:
table 1: parameters of wind turbine
Table 2: electrical parameters of doubly-fed wind turbine generator
Fig. 8 and fig. 9 show the comparison between the rotation speed and the electromagnetic torque of the generator with or without inertia response in the conventional MPPT maximum power tracking mode of the wind turbine. The environment wind speed is 10.5m/s, the rotating speed of the wind turbine generator is 1.08pu, and the electromagnetic torque of the generator is 0.5pu. At simulation time 4s a load of 2MW was put in. When the wind turbine generator has inertia response capability, the electromagnetic torque of the wind turbine generator is increased at the moment of load input, the electromagnetic power is also increased, the increased power is used for inhibiting the drop of the power grid frequency, the rotating speed of the wind turbine generator is reduced, the kinetic energy stored in the rotor is released, and the control effect of virtual inertia is reflected. When the wind turbine generator does not have inertia response capability, the rotation speed and the electromagnetic torque of the generator do not respond to load change, and the control effect of virtual inertia cannot be reflected.
Fig. 10 and 11 show the comparison of the generator rotation speed and the electromagnetic torque of the two conditions of inertia response or no inertia response when the wind turbine works in the rotation speed direct control mode. The ambient wind speed is 12.5m/s, the rotating speed of the wind turbine generator is controlled to be 1.2pu as the upper limit of the rotating speed, and the electromagnetic torque of the generator is 0.7pu. At simulation time 4s a load of 2MW was put in. Similar to the comparison result of MPPT mode, when wind turbine generator system possesses inertia response ability, can embody virtual inertia's control effect. When the wind turbine generator does not have inertia response capability, the rotation speed and the electromagnetic torque of the generator do not respond to load change, and the control effect of virtual inertia cannot be reflected.
In summary, the comparison test proves that the control method provided by the invention can effectively realize the direct control of the rotating speed. On the basis, the free switching of the direct rotation speed control and the MPPT control and the free switching of whether the inertia response control is performed are realized by arranging two functional switching modules.
The present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. A doubly-fed voltage source wind turbine generator system rotational speed-inertia combination control method is characterized by comprising the following steps of: the active power control of the voltage source of the rotor-side converter comprises the following steps:
the rotation speed directly controls the outer ring: given rotation speed omega of wind turbine generator r * And actual rotation speed omega r The difference is input into a PI controller to obtain a torque output given T of a rotating speed outer ring ωr * ；
When the direct control of the rotating speed is executed, let T set ＝T ωr * ；
The rotating speed limiting control module: actual rotation speed omega of wind turbine generator r And rated maximum rotation speed omega rmax The difference is input into a PI controller to obtain T e1 * The upper limit of the PI controller is the rated maximum electromagnetic torque T of the wind turbine generator max The lower limit is T set The method comprises the steps of carrying out a first treatment on the surface of the Actual rotation speed omega of wind turbine generator r And rated minimum rotational speed omega rmin The difference is input into a PI controller to obtain T e2 * Wherein the upper limit of the PI controller is T set The lower limit is 0; given value T of electromagnetic torque of wind turbine generator e * The method comprises the following steps:
wherein omega rmid ＝(ω rmin +ω rmax )/2。
2. The doubly-fed voltage source wind turbine generator rotational speed-inertia combination control method according to claim 1 is characterized by comprising the following steps: the rotating speed-MPPT switching control module is arranged for switching the T set Wherein, when performing MPPT control, let T set ＝k opt ω r 2 ；k opt ω r 2 For optimum torque setting, k opt Is the optimal torque coefficient.
3. The doubly-fed voltage source wind turbine generator rotational speed-inertia combination control method according to claim 1 is characterized by comprising the following steps: in the active power control of the voltage source, T e * Obtaining the torque angular velocity omega through a virtual rotor motion equation module Te1 And will omega Te1 Substituting the slip angle to calculate to obtain a slip angle theta slip 。
4. The doubly-fed voltage source wind turbine generator rotational speed-inertia combination control method according to claim 3, wherein the method comprises the following steps of: the virtual inertia switching control module is arranged in the active power control of the voltage source and is used for controlling whether the switching is performed with virtual inertia response or not, wherein:
when the virtual inertia response is not performed, the power grid frequency omega is obtained g As output signal omega Te2 ；
When virtual inertia response is carried out, the damping frequency omega of the power grid is reduced g_damp As output signal omega Te2 ；
In the slip angle calculation, ω is first calculated Te1 And omega Te2 Summing to obtain virtual synchronous angular velocity omega vsg Thereafter ω vsg Input integrator omega b And/s to obtain a virtual rotor angle theta vsg Finally, theta is set vsg Angle theta with rotor r Difference is made to obtain the slip angle theta slip 。
5. The doubly-fed voltage source wind turbine generator rotational speed-inertia combination control method according to claim 4 is characterized by comprising the following steps: the rotor angle theta r From the actual rotational speed omega of the wind turbine r Input integrator omega b And/s.
6. The doubly-fed voltage source wind turbine generator rotational speed-inertia combination control method according to claim 4 is characterized by comprising the following steps: the grid damping frequency omega g_damp From omega g Input first order inertial module 1/k c And solving for s+1.
7. The doubly-fed voltage source wind turbine generator rotational speed-inertia combination control method according to claim 6 is characterized by comprising the following steps: the method also comprises the step of controlling the reactive power of the voltage source of the rotor-side converter, and is used for controlling the reactive power of the stator side of the wind turbine, so as to realize the unit power factor operation of the wind turbine.
8. The doubly-fed voltage source wind turbine generator rotational speed-inertia combination control method according to claim 7 is characterized by comprising the following steps: in the reactive power control of the voltage source, the given value psi of the d-axis component of the rotor flux linkage rd * And the actual value psi rd The difference is input into a PI controller to obtain an input U of the reverse coordinate transformation md The method comprises the steps of carrying out a first treatment on the surface of the Given value psi of rotor flux linkage q-axis component rq * And the actual value psi rq The difference is input to a PI controller to obtain an input U of the reverse coordinate transformation mq ；
Finally, U is set md 、U mq And theta slip Inputting the inverse coordinate transformation, inputting the transformation result into a SVPWM module, and generating a pulse control signal S rabc And controlling the operation of the rotor-side converter.
9. The doubly-fed voltage source wind turbine generator rotational speed-inertia combination control method of claim 8 is characterized by comprising the following steps: rotor current I r Based on slipAngle theta slip Coordinate system conversion from abc to dq is carried out, and the actual d-axis component psi of the generator rotor flux is obtained through flux linkage calculation rd And the q-axis component actual value ψ rq 。
10. The doubly-fed voltage source wind turbine generator rotational speed-inertia combination control method of claim 8 is characterized by comprising the following steps: the given value psi of the d-axis component of the rotor flux linkage rd * From a given value Q of stator-side reactive power s * And the actual value Q s The difference is input to the PI controller.
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| CN202311546726.0A CN117578632B (en) | 2023-11-20 | 2023-11-20 | Double-fed voltage source wind turbine generator system rotation speed-inertia combination control method |
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| CN202311546726.0A CN117578632B (en) | 2023-11-20 | 2023-11-20 | Double-fed voltage source wind turbine generator system rotation speed-inertia combination control method |
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Citations (6)
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| CN107863783A (en) * | 2017-10-26 | 2018-03-30 | 上海交通大学 | Double-fed wind power generator virtual synchronous control method |
| US20190222026A1 (en) * | 2018-01-14 | 2019-07-18 | Qingchang ZHONG | Reconfiguration of Inertia, Damping and Fault Ride-Through for a Virtual Synchronous Machine |
| CN113113923A (en) * | 2020-12-24 | 2021-07-13 | 南京工业职业技术大学 | Two-stage energy storage system main circuit for hybrid energy storage and power module thereof |
| CN113765124A (en) * | 2021-09-24 | 2021-12-07 | 上海交通大学 | Selective response control system and method for full wind speed range voltage source type wind turbine generator |
| CN116742688A (en) * | 2022-03-02 | 2023-09-12 | 上海交通大学 | Full wind speed section inertia response control system of voltage source full power wind turbine generator system |
| CN117060484A (en) * | 2023-08-15 | 2023-11-14 | 沈阳工程学院 | Improved self-adaptive control method based on wind-storage combined frequency modulation system |
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Patent Citations (6)
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| CN107863783A (en) * | 2017-10-26 | 2018-03-30 | 上海交通大学 | Double-fed wind power generator virtual synchronous control method |
| US20190222026A1 (en) * | 2018-01-14 | 2019-07-18 | Qingchang ZHONG | Reconfiguration of Inertia, Damping and Fault Ride-Through for a Virtual Synchronous Machine |
| CN113113923A (en) * | 2020-12-24 | 2021-07-13 | 南京工业职业技术大学 | Two-stage energy storage system main circuit for hybrid energy storage and power module thereof |
| CN113765124A (en) * | 2021-09-24 | 2021-12-07 | 上海交通大学 | Selective response control system and method for full wind speed range voltage source type wind turbine generator |
| CN116742688A (en) * | 2022-03-02 | 2023-09-12 | 上海交通大学 | Full wind speed section inertia response control system of voltage source full power wind turbine generator system |
| CN117060484A (en) * | 2023-08-15 | 2023-11-14 | 沈阳工程学院 | Improved self-adaptive control method based on wind-storage combined frequency modulation system |
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