CN113217281B - Wind power generation system, control method and device thereof, electronic device, and storage medium - Google Patents
Wind power generation system, control method and device thereof, electronic device, and storage medium Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0236—Adjusting aerodynamic properties of the blades by changing the active surface of the wind engaging parts, e.g. reefing or furling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Control Of Eletrric Generators (AREA)
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Abstract
The invention discloses a wind power generation system, a control method and device thereof, electronic equipment and a storage medium. The control method comprises the following steps: determining a target power parameter of the expected power output by the generator, and determining a target rotating speed of the impeller corresponding to the target power parameter; determining a target torsion angle of a blade of the impeller according to the target rotating speed; and driving the blade to reach the target torsion angle and rotate at the target torsion angle, so that the electric energy parameter of the electric energy output by the generator is matched with the target electric energy parameter. Therefore, the converter can be omitted from the wind power generation system by adjusting the torsional angle of the blade, so that the situation that the whole wind power generation system is stopped due to the fault of the converter to cause the loss of a large amount of generated energy can be avoided, and the power inertia stability of the power system is improved; on the other hand, the sensitivity to the change of the high-low voltage ride through state of the power grid can be weakened.
Description
Technical Field
The present invention relates to the field of wind power generation technologies, and in particular, to a wind power generation system, a control method and apparatus thereof, an electronic device, and a storage medium.
Background
Currently, mainstream wind power generation systems can be divided into full power and double-fed types. The full-power wind power generation system comprises a full-power wind power generator, wherein a converter is connected between a stator of the full-power wind power generator and a power grid, and the converter is used for converting electric energy output by the generator into electric energy with the same voltage and frequency as the power grid after rectification and inversion and inputting the electric energy into the power grid. The double-fed type wind power generation system comprises a double-fed wind power generator, wherein a converter is connected between a rotor of the double-fed wind power generator and a power grid, and the converter is used for changing the frequency of exciting current in the rotor, so that electric energy with the same voltage and frequency as the power grid is generated on a stator of the double-fed wind power generator and is input into the power grid.
Therefore, in the prior art, no matter a full-power type wind power generation system or a double-fed type wind power generation system, the grid connection of the wind power generation system and a power grid can be realized only by changing the electric energy output by the wind power generator into the electric energy with the same voltage and frequency as the power grid through the converter, and the complete machine of the wind power generation system is stopped due to failure of the converter, so that a large amount of generated energy is lost.
Disclosure of Invention
The invention provides a wind power generation system, a control method and device thereof, electronic equipment and a storage medium, aiming at overcoming the defect that the wind power generation system in the prior art can realize grid connection only by a converter or cannot realize grid connection.
The invention solves the technical problems through the following technical scheme:
a control method of a wind power generation system, the wind power generation system comprising: the generator is used for converting kinetic energy generated by the impeller into electric energy and outputting the electric energy;
the control method comprises the following steps:
determining a target electric energy parameter of expected electric energy output by the generator, and determining a target rotating speed of the impeller corresponding to the target electric energy parameter;
determining a target torsion angle of a blade of the impeller according to the target rotating speed;
and driving the blade to reach the target torsion angle and rotate at the target torsion angle, so that the electric energy parameter of the electric energy output by the generator is matched with the target electric energy parameter.
Optionally, determining a target rotational speed of the impeller corresponding to the target electrical energy parameter comprises:
determining a gearbox transformation ratio and a pole pair number of the generator;
and determining a target rotating speed corresponding to the target electric energy parameter according to the gear box transformation ratio and the magnetic pole pair number.
Optionally, determining a target torsion angle of a blade of the impeller according to the target rotation speed includes:
determining rotation speed related information, wherein the rotation speed related information comprises at least one of the following information: environmental information, size information of the blades and power demand information of the wind power generation system;
and determining the target torsion angle according to the rotating speed related information and the target rotating speed.
A control device of a wind power generation system, the wind power generation system comprising: the generator is used for converting kinetic energy generated by the impeller into electric energy and outputting the electric energy;
the control device includes:
the calculation module is used for determining a target electric energy parameter of the expected electric energy output by the generator, determining a target rotating speed of the impeller corresponding to the electric energy parameter, and determining a target torsion angle of a blade of the impeller according to the target rotating speed;
and the driving module is used for driving the blades to reach the target torsion angle and rotate at the target torsion angle so as to enable the electric energy parameter of the electric energy output by the generator to be matched with the target electric energy parameter.
A wind power generation system comprising:
an impeller;
the generator is used for converting kinetic energy generated by the impeller into electric energy and outputting the electric energy;
the controller is used for determining a target electric energy parameter of expected electric energy output by the generator, determining a target rotating speed of the impeller corresponding to the target electric energy parameter, and determining a target torsion angle of blades of the impeller according to the target rotating speed;
and the blade driver is used for driving the blade to reach the target torsion angle and rotate at the target torsion angle so as to enable the electric energy parameter of the electric energy output by the generator to be matched with the target electric energy parameter.
Optionally, in determining the target speed, the controller is configured to:
determining a gearbox transformation ratio and a pole pair number of the generator;
and determining a target rotating speed corresponding to the target electric energy parameter according to the gear box transformation ratio and the magnetic pole pair number.
Optionally, in determining the target twist angle, the controller is configured to:
determining rotation speed related information, wherein the rotation speed related information comprises at least one of the following information: environmental information, size information of the blades and power demand information of the wind power generation system;
and determining the target torsion angle according to the rotating speed related information and the target rotating speed.
Optionally, the wind power generation system further comprises: a grid-connected device;
and the generator is connected to a power grid through the grid-connected device.
Optionally, the wind power generation system further comprises:
and the reactive compensation device is connected in parallel to a circuit between the generator and the power grid and is used for compensating reactive power generated by the generator under the condition that the actual rotating speed of the impeller is greater than the rated rotating speed of the impeller.
Optionally, the generator is a squirrel cage generator.
An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of controlling a wind power system according to any of the above when executing the computer program.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of controlling a wind power system according to any of the preceding claims.
The positive progress effects of the invention are as follows:
in the embodiment of the invention, the torsion angle of the paddle is adjusted according to the target electric energy parameter of the expected electric energy output by the generator, so that the generator of the wind power generation system directly outputs the electric energy matched with the expected target electric energy parameter, and therefore, a converter is not required to be arranged in the wind power generation system, on one hand, the situation that the whole machine of the wind power generation system is stopped due to the fault of the converter, so that the loss of a large amount of generated energy is caused can be avoided, and the power inertia stability of the power system is improved; on the other hand, the sensitivity to the change of the high-low voltage ride through state of the power grid can be weakened.
Drawings
FIG. 1a is a schematic view of a wind power generation system according to an exemplary embodiment of the present invention;
FIG. 1b is a partially schematic, modular illustration of a wind power generation system according to an exemplary embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method of controlling a wind power system in accordance with an exemplary embodiment of the present invention;
FIG. 3 is a block schematic diagram of a control apparatus of a wind power system according to an exemplary embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an exemplary embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Fig. 1a is a schematic structural diagram of a wind power generation system according to an exemplary embodiment of the present invention, and fig. 1b is a schematic partial module diagram of a wind power generation system according to an exemplary embodiment of the present invention, referring to fig. 1a and 1b, the wind power generation system includes an impeller 11, a generator 12, a controller 13, and a blade driver 14, the impeller 11 includes a wind rotor 111 and blades 112, and the blades 112 are rotated by wind power so that the wind rotor 111 converts wind energy into kinetic energy. The impeller 11 is connected to a generator 12, and the generator 12 is used for converting kinetic energy generated by the impeller into electric energy and outputting the electric energy to a power grid 15. The controller 13 is connected to the generator 12 and the blade driver 14, respectively, and the controller 13 is configured to determine a target electric energy parameter of the expected electric energy output by the generator 12, determine a target rotation speed of the impeller 11 corresponding to the target electric energy parameter, and determine a target torsion angle (blade angle) of the blade 112 of the impeller 11 according to the target rotation speed, so as to control the blade driver 14 to drive the blade 112 to reach the target torsion angle, so that the blade 112 is driven by wind power to rotate at the target torsion angle. As can be appreciated, rotation of the blades 112 at a target twist angle may cause the power parameters of the power output by the generator to match the target power parameters.
The target power parameter of the expected power is the target power parameter of the power that the user wants to output from the generator 12, and the target power parameter includes the amplitude and/or frequency of the current.
The target power parameter of the expected power may be determined according to the power parameter required by the load, for example, if the current frequency required by the load of the wind power generation system is 50Hz, the determining of the target power parameter includes: the current frequency is 50Hz. If the blade 112 rotates at the target torsion angle determined based on the current frequency of 50Hz, the frequency of the current output by the generator 12 is about 50Hz at this time, which meets the requirement of supplying power to the load, and the current output by the generator 12 can directly supply power to the load without rectification and inversion by the converter.
The target power parameter of the expected power may be determined according to the power parameter of the power grid 15, for example, if the current frequency of the power grid 15 is 50Hz, the determining of the target power parameter includes: the current frequency is 50Hz. If the blades 112 rotate at the target torsion angle determined based on the current frequency of 50Hz, the frequency of the current output by the generator 12 is about 50Hz, which meets the grid-connection requirement of the power grid, and the current output by the generator 12 can be directly input into the power grid without rectification and inversion by a converter.
That is to say, in the embodiment of the present disclosure, the converter may not be arranged in the wind power generation system, so that on one hand, the situation that the whole wind power generation system is shut down due to the fault of the converter, which causes the loss of a large amount of generated energy, can be avoided, and the power inertia stability of the power system is improved; on the other hand, the sensitivity to the change of the high-low voltage ride through state of the power grid can be weakened.
It should be noted that the electric energy parameter of the electric energy output by the generator is matched with the target electric energy parameter, which does not mean that each electric energy parameter is completely the same as the corresponding target electric energy parameter, and in the actual operation process, an error may exist, as long as the difference between each electric energy parameter and the corresponding target electric energy parameter is ensured to be within the error allowable range, and the error allowable range may be set by itself according to the actual requirement. For example, after the target torsion angle of the blade is adjusted, the difference between the frequency of the current actually output by the generator and the current frequency contained in the target electric energy parameter is small, the difference is within the error allowable range, and the electric energy parameter of the electric energy output by the generator is determined to be matched with the target electric energy parameter.
In one embodiment, in determining the target rotational speed, the controller determines a gearbox transformation ratio and a pole pair number of the generator, and then determines the target rotational speed corresponding to the target electrical energy parameter according to the gearbox transformation ratio and the pole pair number. Taking the target electrical energy parameter including the current frequency as an example, the current frequency and the target rotation speed of the impeller can be represented by the following formula:
wherein n represents the target rotation speed (unit: RPM) of the impeller, f represents the current frequency (target power parameter), p represents the pole pair number, and L represents the gear box transformation ratio.
If f, p and L are known, the target rotational speed n of the impeller corresponding to the target electric energy parameter f can be obtained according to the above formula. For example, the current frequency of the power grid in China is 50Hz, and if f =50Hz is set, and if p =3 and l =1 are known, the corresponding target rotation speed n =1000r/min can be obtained according to the formula.
In one embodiment, when determining the target torque angle, the controller determines the rotational speed related information first, and then determines the target torque angle according to the rotational speed related information and the target rotational speed. Wherein the information related to the rotation speed comprises at least one of the following information: the system comprises environmental information, size information of the blades and power demand information of the wind power generation system. The environmental information includes wind speed, environmental humidity, and the like.
It can be understood that, in the actual operation process of the impeller, the size information of the blades is generally fixed and unchanged, and the parameter information influencing the target torsion angle is environment information and power consumption demand information.
In an embodiment, when the target torsion angle is determined, the target torsion angle may be determined based on a feedback control method, for example, under the condition that other information related to the rotation speed is not changed, if the current wind speed is increased and the actual rotation speed of the impeller (i.e., the actual rotation speed of the wind wheel) is higher than the calculated target rotation speed, the target torsion angle is correspondingly reduced, and the blades are slightly retracted by controlling the blade driver; and if the current wind speed is reduced and the actual rotating speed of the impeller is lower than the calculated target rotating speed, correspondingly increasing the target torsion angle, and slightly opening the blade by controlling the blade driver.
In one embodiment, the mapping relationship between the rotational speed-related information and the target rotational speed is determined by a fan pneumatic model. The wind turbine aerodynamic model can be obtained by training a neural network by adopting a large amount of sample data, the input parameters of the neural network comprise information related to the rotating speed, the output parameters are target rotating speeds, and the specific training process of the model is not repeated herein.
In one embodiment, referring to fig. 1, the wind power generation system further includes a grid connection device 16, and the grid connection device 16 is disposed with grid connection and grid disconnection logic and is responsible for grid connection and grid disconnection of the wind power generation system, that is, the generator is connected to the grid through the grid connection device 16, and the input of the electric energy output by the generator to the grid is achieved through the grid connection device or is avoided.
In one embodiment, referring to fig. 1, the wind power generation system further comprises a reactive power compensation device 17, the reactive power compensation device 17 is connected to the circuit between the generator 12 and the power grid 15, and the reactive power compensation device 17 is used for compensating reactive power generated by the generator under the condition that the actual rotating speed of the impeller 11 is greater than the rated rotating speed of the impeller, so as to improve the power factor of the power grid, reduce the loss of an electric energy transmission line, improve the power supply efficiency and improve the power supply environment.
The reactive power compensation device 17 may be, but is not limited to, an SVC (static var compensator) or an SVG (dynamic reactive compensator). If the reactive power compensation device adopted by the wind power generation system is SVG, an internal terminal voltage which is the same as the phase amplitude of the power grid can be established by the SVG before grid connection in a grid connection mode, and at the moment, the grid connection device does not comprise a grid connection soft start circuit. If the reactive power compensation device adopted by the wind power generation system is an SVC, the grid-connected device needs to comprise a grid-connected soft start circuit, and current impact brought by grid connection at the moment is restrained through the grid-connected soft start circuit.
In the related art, in order to improve the utilization rate of wind energy capture, the impeller is generally controlled to rotate at a rated rotating speed, but in the embodiment of the invention, the impeller is not necessarily rotated at the rated rotating speed by adjusting the torsion angle of the blade, the actual rotating speed of the impeller may be less than the rated rotating speed, and the actual rotating speed of the impeller may also be greater than the rated rotating speed.
The squirrel cage generator can be adopted as the generator in any of the above embodiments, since the squirrel cage generator can operate in a super-synchronous state. The super-synchronous state means that the actual rotation speed of the generator is greater than the rated rotation speed.
The squirrel-cage generator also has the advantage that the outlet wire of the rotor of the squirrel-cage generator does not need to be provided with a carbon brush (the carbon brush needs to be maintained regularly), and compared with a double-fed generator needing to be provided with the carbon brush, the squirrel-cage generator is easy to maintain and can be suitable for a distributed or offshore wind turbine generator set, and the squirrel-cage generator is higher in universality and wider in application.
The control process of the wind power system will be described with reference to fig. 1a and 1 b.
Fig. 2 is a flowchart illustrating a control method of a wind power generation system according to an exemplary embodiment of the present invention, which is applied to the wind power generation system according to any of the above embodiments, and includes the steps of:
The target electric energy parameter of the expected electric energy is the target electric energy parameter of the electric energy which the user wants the generator to output, and the target electric energy parameter comprises the amplitude and/or the frequency of the current. The target electric energy parameter of the expected electric energy can be determined according to the electric energy parameter required by the load, or the target electric energy parameter of the expected electric energy is determined according to the electric energy parameter of the power grid.
In one embodiment, the step of determining the target rotational speed comprises: the method comprises the steps of firstly determining the gear box transformation ratio and the magnetic pole number pairs of the generator, and then determining the target rotating speed corresponding to the target electric energy parameters according to the gear box transformation ratio and the magnetic pole number pairs.
And step 202, determining a target torsion angle of the blade of the impeller according to the target rotating speed.
In one embodiment, the step of determining the target twist angle comprises: firstly, determining the related information of the rotating speed, and then determining the target torsion angle according to the related information of the rotating speed and the target rotating speed. Wherein the information related to the rotation speed comprises at least one of the following information: environmental information, blade size information, and power demand information for the wind power generation system. The environmental information includes wind speed, environmental humidity, and the like.
It can be understood that, in the actual operation process of the impeller, the size information of the blades is generally fixed and unchanged, and the parameter information influencing the target torsion angle is environment information and power consumption demand information.
In an embodiment, when the target torsion angle is determined, the target torsion angle may be determined based on a feedback control method, for example, under the condition that other information related to the rotation speed is not changed, if the current wind speed is increased and the actual rotation speed of the impeller (i.e., the actual rotation speed of the wind wheel) is higher than the calculated target rotation speed, the target torsion angle is correspondingly reduced, and the blades are slightly retracted by controlling the blade driver; and if the current wind speed is reduced and the actual rotating speed of the impeller is lower than the calculated target rotating speed, correspondingly increasing the target torsion angle, and slightly opening the blade by controlling the blade driver.
In one embodiment, the mapping of the rotational speed related information to the target rotational speed is determined by a fan pneumatic model. The wind turbine aerodynamic model can be obtained by training a neural network by adopting a large amount of sample data, the input parameters of the neural network comprise rotating speed related information, the output parameters are target rotating speeds, and the specific training process of the model is not described herein again.
And 203, driving the blades to reach the target torsion angle and rotating at the target torsion angle so as to enable the electric energy parameter of the electric energy output by the generator to be matched with the target electric energy parameter.
Therefore, the target rotating speed of the impeller is determined according to the target electric energy parameter of the expected electric energy output by the generator, the target torsion angle of the blade of the impeller is further determined according to the target rotating speed, the torsion angle of the blade is adjusted according to the target torsion angle, so that the generator of the wind power generation system can directly output the electric energy matched with the expected target electric energy parameter, a converter is not required to be arranged in the wind power generation system, on one hand, the situation that the whole machine of the wind power generation system is stopped due to the fault of the converter, so that the loss of a large amount of generated energy is caused can be avoided, and the power inertia stability of the power system is improved; on the other hand, the sensitivity to the change of the high-low voltage ride through state of the power grid can be weakened.
Corresponding to the control method embodiment of the wind power generation system, the invention also provides an embodiment of a control device of the wind power generation system.
Fig. 3 is a block schematic diagram of a control device of a wind power generation system according to an exemplary embodiment of the present invention, the control device comprising:
the calculation module 31 is configured to determine a target electric energy parameter of the electric generator outputting expected electric energy, determine a target rotation speed of the impeller corresponding to the electric energy parameter, and determine a target torsion angle of blades of the impeller according to the target rotation speed;
and the driving module 32 is configured to drive the blade to reach the target torsion angle and rotate at the target torsion angle, so that an electric energy parameter of the electric energy output by the generator matches the target electric energy parameter.
Optionally, when determining the target rotation speed of the impeller corresponding to the target electric energy parameter, the calculating module is configured to:
determining a gearbox transformation ratio and a pole pair number of the generator;
and determining a target rotating speed corresponding to the target electric energy parameter according to the gear box transformation ratio and the magnetic pole pair number.
Optionally, when determining the target torsion angle of the blade of the impeller according to the target rotation speed, the calculation module is configured to:
determining rotation speed related information, wherein the rotation speed related information comprises at least one of the following information: environmental information, size information of the blades and power demand information of the wind power generation system;
and determining the target torsion angle according to the rotating speed related information and the target rotating speed.
For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the invention. One of ordinary skill in the art can understand and implement it without inventive effort.
Fig. 4 is a schematic diagram of an electronic device according to an exemplary embodiment of the present invention, and illustrates a block diagram of an exemplary electronic device 40 suitable for implementing embodiments of the present invention. The electronic device 40 shown in fig. 4 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiment of the present invention.
As shown in FIG. 4, electronic device 40 may take the form of a general purpose computing device, which may be a server device, for example. The components of electronic device 40 may include, but are not limited to: the at least one processor 41, the at least one memory 42, and a bus 43 connecting the various system components (including the memory 42 and the processor 41).
The bus 43 includes a data bus, an address bus, and a control bus.
The memory 42 may include volatile memory, such as Random Access Memory (RAM) 421 and/or cache memory 422, and may further include Read Only Memory (ROM) 423.
The processor 41 executes various functional applications and data processing, such as the methods provided by any of the above embodiments, by running a computer program stored in the memory 42.
The electronic device 40 may also communicate with one or more external devices 44 (e.g., keyboard, pointing device, etc.). Such communication may be through an input/output (I/O) interface 45. Also, the model-generated electronic device 40 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via a network adapter 46. As shown, the network adapter 46 communicates with the other modules of the model-generated electronic device 40 over a bus 43. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the model-generating electronic device 40, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.
It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module according to embodiments of the invention. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the method provided in any of the above embodiments.
While specific embodiments of the invention have been described above, it will be understood by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (12)
1. A control method of a wind power generation system, characterized in that the wind power generation system comprises: the generator is used for converting kinetic energy generated by the impeller into electric energy and outputting the electric energy;
the control method comprises the following steps:
determining a target power parameter of the expected power output by the generator, and determining a target rotating speed of the impeller corresponding to the target power parameter;
determining a target torsion angle of a blade of the impeller according to the target rotating speed;
driving the blade to reach the target torsion angle and rotate at the target torsion angle, so that the electric energy parameter of the electric energy output by the generator is matched with the target electric energy parameter;
the wind power generation system does not need to be provided with a converter;
the target power parameter includes an amplitude and/or a frequency of the current.
2. The control method of a wind power system according to claim 1, wherein determining a target rotational speed of the impeller corresponding to the target power parameter comprises:
determining a gearbox transformation ratio and a pole pair number of the generator;
and determining a target rotating speed corresponding to the target electric energy parameter according to the gear box transformation ratio and the magnetic pole pair number.
3. The method of controlling a wind power system according to claim 1, wherein determining a target twist angle of a blade of the impeller from the target rotational speed comprises:
determining rotation speed related information, wherein the rotation speed related information comprises at least one of the following information: environmental information, size information of the blades and power demand information of the wind power generation system;
and determining the target torsion angle according to the rotating speed related information and the target rotating speed.
4. A control device for a wind power generation system, characterized in that the wind power generation system comprises: the generator is used for converting kinetic energy generated by the impeller into electric energy and outputting the electric energy;
the control device includes:
the calculation module is used for determining a target electric energy parameter of the expected electric energy output by the generator, determining a target rotating speed of the impeller corresponding to the electric energy parameter, and determining a target torsion angle of a blade of the impeller according to the target rotating speed;
and the driving module is used for driving the blades to reach the target torsion angle and rotate at the target torsion angle so as to enable the electric energy parameter of the electric energy output by the generator to be matched with the target electric energy parameter.
5. A wind power generation system, comprising:
an impeller;
the generator is used for converting kinetic energy generated by the impeller into electric energy and outputting the electric energy;
the controller is used for determining a target electric energy parameter of expected electric energy output by the generator, determining a target rotating speed of the impeller corresponding to the target electric energy parameter, and determining a target torsion angle of blades of the impeller according to the target rotating speed;
the blade driver is used for driving the blades to reach the target torsion angle and rotate at the target torsion angle so as to enable the electric energy parameter of the electric energy output by the generator to be matched with the target electric energy parameter;
the wind power generation system does not need to be provided with a converter;
the target power parameter includes an amplitude and/or a frequency of the current.
6. The wind power system of claim 5, wherein in determining the target rotational speed, the controller is configured to:
determining a gearbox transformation ratio and a pole pair number of the generator;
and determining a target rotating speed corresponding to the target electric energy parameter according to the gear box transformation ratio and the magnetic pole pair number.
7. The wind power system of claim 5, wherein in determining the target twist angle, the controller is configured to:
determining rotation speed related information, wherein the rotation speed related information comprises at least one of the following information: environmental information, size information of the blades and power demand information of the wind power generation system;
and determining the target torsion angle according to the rotating speed related information and the target rotating speed.
8. The wind power generation system of claim 5, further comprising: a grid-connected device;
and the generator is connected to a power grid through the grid-connected device.
9. Wind power system according to any of claims 5-8, characterized in that the wind power system further comprises:
and the reactive compensation device is connected in parallel to a circuit between the generator and the power grid and is used for compensating reactive power generated by the generator under the condition that the actual rotating speed of the impeller is greater than the rated rotating speed of the impeller.
10. The wind-powered electric generating system of claim 9, wherein the generator is a squirrel cage generator.
11. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the control method of a wind power system according to any of claims 1 to 3 when executing the computer program.
12. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, realizes the steps of the control method of a wind power system according to any of the claims 1 to 3.
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