CN114439682B - Control method and device of wind generating set - Google Patents
Control method and device of wind generating set Download PDFInfo
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- CN114439682B CN114439682B CN202210023186.7A CN202210023186A CN114439682B CN 114439682 B CN114439682 B CN 114439682B CN 202210023186 A CN202210023186 A CN 202210023186A CN 114439682 B CN114439682 B CN 114439682B
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/327—Rotor or generator speeds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/335—Output power or torque
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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
Abstract
The application provides a control method, a control device, electronic equipment and a storage medium of a wind generating set, wherein the method comprises the following steps: the active power instruction value of the power grid dispatching end AGC system is received to obtain a generator rotating speed set value corresponding to the active power instruction value and obtain an actual generator rotating speed value of the wind generating set, the actual generator rotating speed value is subtracted from the generator rotating speed set value to generate a variable pitch control instruction according to the obtained rotating speed difference, and a variable pitch executing mechanism is controlled to perform variable pitch control based on the variable pitch control instruction.
Description
Technical Field
The present disclosure relates to the field of wind power generation technologies, and in particular, to a method and an apparatus for controlling a wind turbine generator system, an electronic device, and a storage medium.
Background
As wind power generation increasingly participates in the daily regulation of the grid, active control of the wind farm is an important part of the daily regulation of the grid. In the related technology, an active power instruction of a wind power plant is issued through power grid scheduling, the active power instruction is issued to each wind driven generator through an energy management platform of the wind power plant, the wind driven generators convert a new torque control reference value and a new rotating speed control reference value through the issued active power value, a wind driven generator control system immediately controls the torque and the rotating speed through the new reference value to complete active power regulation, a closed-loop control loop is newly added on the traditional torque control and rotating speed control to assist active power regulation, but the closed-loop control loops of a plurality of wind driven generator sets can generate coupling, namely, the closed-loop control loops can mutually influence, and therefore the rapidity and the accuracy of active power regulation can be influenced.
Disclosure of Invention
The application provides a control method and device of a wind generating set, electronic equipment and a storage medium.
An embodiment of a first aspect of the present application provides a control method for a wind turbine generator system, where the method includes: receiving an active power instruction value of an AGC system of a power grid dispatching terminal; acquiring a set value of the rotating speed of the generator corresponding to the active power instruction value; acquiring an actual generator rotating speed value of the wind generating set;
subtracting the actual generator rotating speed value from the generator rotating speed set value to obtain a rotating speed difference; generating a variable pitch control instruction according to the rotation speed difference; and sending the variable pitch control instruction to a variable pitch executing mechanism of the wind generating set so that the variable pitch executing mechanism performs variable pitch control based on the variable pitch control instruction.
In an embodiment of the application, the obtaining a set value of a rotation speed of a generator corresponding to the active power instruction value includes: obtaining active power corresponding to the active power instruction value; and obtaining a generator rotating speed set value corresponding to the active power according to a pre-established corresponding relation between the active power and the generator rotating speed set value.
In an embodiment of the present application, before receiving the active power instruction value of the power grid dispatching end AGC system, the method further includes: obtaining a plurality of sample active powers of the wind generating set and a sample generator rotating speed corresponding to each sample active power; aiming at each sample active power, under the condition that the sample active power is in a preset power interval and the sample generator rotating speed is in a preset rotating speed interval, determining a generator rotating speed set value corresponding to the sample active power according to the optimal gain of the wind generating set; taking the rated rotating speed of the generator of the wind generating set as a set rotating speed value of the generator corresponding to the sample active power under the condition that the sample active power is not in a preset power interval and/or the rotating speed of the sample generator is not in a preset rotating speed interval; and establishing a corresponding relation between the active power and the set value of the rotating speed of the generator according to the active power of each sample and the set value of the rotating speed of the generator corresponding to the active power of each sample.
In an embodiment of the application, the sending the pitch control instruction to a pitch actuator of the wind turbine generator system to enable the pitch actuator to perform pitch control based on the pitch control instruction includes: and under the condition that the set value of the rotating speed of the generator is greater than the actual rotating speed value of the generator, the variable pitch control instruction is a pitch angle value corresponding to the increased rotating speed difference, and the pitch angle value is increased by the variable pitch executing mechanism.
In one embodiment of the present application, the method further comprises: and under the condition that the set value of the rotating speed of the generator is smaller than the actual rotating speed value of the generator, the variable pitch control instruction is a pitch angle value corresponding to the reduced rotating speed difference, and the variable pitch executing mechanism reduces the pitch angle value.
In an embodiment of the present application, before said subtracting said actual generator speed from said generator speed to obtain a speed difference, said method further comprises: and carrying out filtering processing on the actual rotating speed of the generator.
The application provides a control method of a wind generating set, which comprises the steps of receiving an active power instruction value of an AGC system at a power grid dispatching end, obtaining a generator rotating speed set value corresponding to the active power instruction value, obtaining an actual generator rotating speed value of the wind generating set, subtracting the actual generator rotating speed value from the generator rotating speed set value, generating a variable pitch control instruction according to the obtained rotating speed difference, and controlling a variable pitch execution mechanism to carry out variable pitch control based on the variable pitch control instruction.
An embodiment of a first aspect of the present application provides a control method for a wind turbine generator system, where the apparatus includes: the receiving module is used for receiving an active power instruction value of an AGC system of a power grid dispatching terminal; the first obtaining module is used for obtaining a set value of the rotating speed of the generator corresponding to the active power instruction value; the second acquisition module is used for acquiring the actual generator rotating speed value of the wind generating set; the calculation module is used for subtracting the actual generator rotating speed value from the set generator rotating speed value to obtain a rotating speed difference; the generating module is used for generating a variable pitch control instruction according to the rotating speed difference; and the control module is used for sending the variable pitch control instruction to a variable pitch executing mechanism of the wind generating set so that the variable pitch executing mechanism performs variable pitch control based on the variable pitch control instruction.
In an embodiment of the application, the first obtaining module is specifically configured to: obtaining active power corresponding to the active power instruction value; and obtaining a set value of the rotating speed of the generator corresponding to the active power according to a pre-established corresponding relationship between the active power and the set value of the rotating speed of the generator.
In one embodiment of the present application, the apparatus further comprises: the third acquisition module is used for acquiring a plurality of sample active powers of the wind generating set and the rotating speed of the sample generator corresponding to each sample active power; the first determining module is used for determining a generator rotating speed set value corresponding to the sample active power according to the optimal gain of the wind generating set under the condition that the sample active power is in a preset power interval and the sample generator rotating speed is in a preset rotating speed interval aiming at each sample active power; the second determining module is used for taking the rated rotating speed of the generator of the wind generating set as a rotating speed set value of the generator corresponding to the sample active power under the condition that the sample active power is not in a preset power interval and/or the rotating speed of the sample generator is not in a preset rotating speed interval; and the establishing module is used for establishing a corresponding relation between the active power and the set value of the rotating speed of the generator according to the active power of each sample and the set value of the rotating speed of the generator corresponding to the active power.
In an embodiment of the present application, the control module is specifically configured to: and under the condition that the set value of the rotating speed of the generator is greater than the actual rotating speed value of the generator, the variable pitch control instruction is a pitch angle value corresponding to the increased rotating speed difference, and the pitch angle value is increased by the variable pitch executing mechanism.
In an embodiment of the present application, the control module is further specifically configured to: and under the condition that the set value of the rotating speed of the generator is smaller than the actual rotating speed value of the generator, the variable pitch control instruction is a pitch angle value corresponding to the reduced rotating speed difference, and the variable pitch executing mechanism reduces the pitch angle value.
In an embodiment of the present application, the filtering module is configured to perform filtering processing on the actual generator speed.
The application provides a wind generating set's controlling means, through receiving the active power instruction value of electric wire netting dispatch end AGC system, in order to obtain the generator rotational speed setting value that corresponds with the active power instruction value, and obtain wind generating set's actual generator rotational speed value, subtract actual generator rotational speed value with generator rotational speed setting value, in order to be according to the rotational speed difference that obtains, generate and become oar control instruction, and control and become oar actuating mechanism and carry out the oar control based on becoming oar control instruction, therefore, based on the active power instruction of electric wire netting dispatch end AGC system, carry out real-time control to wind generating set through becoming oar actuating mechanism, realize the half-open loop control of active control's wind generating set, improve wind generating set's active power control stability and the precision under the active power instruction.
An embodiment of a third aspect of the present application provides an electronic device, including: the control method of the wind generating set in the embodiment of the application is realized by the aid of a memory, a processor and a computer program which is stored in the memory and can run on the processor.
A fourth aspect of the present application provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, is a control method for a wind turbine generator system in an embodiment of the present application.
Other effects of the above-described alternative will be described below with reference to specific embodiments.
Drawings
Fig. 1 is a schematic flow chart of a control method of a wind turbine generator system according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart of another control method for a wind turbine generator system according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a semi-open loop control method of an actively controlled wind generating set according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a control device of a wind generating set according to an embodiment of the present application;
FIG. 5 is a schematic structural diagram of another control device of a wind generating set according to an embodiment of the present application;
FIG. 6 is a block diagram of an electronic device of one embodiment of the present application.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The following describes a control method, a control device and electronic equipment of a wind turbine generator system according to an embodiment of the present application with reference to the drawings.
Fig. 1 is a schematic flow chart of a control method of a wind turbine generator system according to an embodiment of the present disclosure. It should be noted that an execution subject of the control method of the wind generating set provided in this embodiment is a control device of the wind generating set, the control device of the wind generating set may be implemented by software and/or hardware, and the control device of the wind generating set in this embodiment may be configured in an electronic device. In some embodiments, the electronic device may include a terminal device, a server, and the like, and in some embodiments, the electronic device may be a server that communicates with a control device of the wind turbine generator system, and may also be a device in the control device configured with the wind turbine generator system, and the embodiment does not specifically limit the electronic device. Fig. 1 is a schematic flow chart of a control method of a wind turbine generator system according to an embodiment of the present disclosure.
As shown in fig. 1, the control method of the wind turbine generator system may include:
In some embodiments, the active power command value of the grid dispatching end Automatic Generation Control (AGC) system may be, but is not limited to, an active power command value DemandPowerReference distributed to the wind turbine generator system by the grid dispatching end AGC system through the telemechanical device and the wind farm energy management system in the current detection period.
And 102, acquiring a set value of the rotating speed of the generator corresponding to the active power instruction value.
In some embodiments, the set value of the generator rotation speed corresponding to the active power command value may be obtained according to a production specification of a generator of the wind turbine generator system, and may also be calculated based on the active power corresponding to the active power command value and the optimal gain of the wind turbine generator system, but is not limited thereto. In an embodiment of the present application, the possible implementation manner of obtaining the set value of the generator rotation speed corresponding to the active power command value is as follows: obtaining active power corresponding to the active power instruction value; and obtaining a generator rotating speed set value corresponding to the active power according to a pre-established corresponding relation between the active power and the generator rotating speed set value.
In some embodiments, the different active power commands correspond to different active powers, and the generator speed setting value corresponds to an active power corresponding to the active power command value in a one-to-one correspondence, and the different active powers correspond to different generator speed setting values, for example, when the active power command value is 100, the active power corresponding to the active power command value is 100 kw, and the generator speed setting value may be 10 rpm.
And 103, acquiring an actual generator rotating speed value of the wind generating set.
In some embodiments, the actual generator speed value of the wind turbine generator set may be measured by a speed measurement device, but is not limited thereto.
And 104, subtracting the actual generator rotating speed value from the set generator rotating speed value to obtain a rotating speed difference.
In some embodiments, before subtracting the actual generator speed from the generator speed to obtain the speed difference, the actual generator speed may be further filtered to avoid interference of the measurement mode, signal conversion, and estimation method of the speed measurement device with the actual generator speed value.
Specifically, the actual generator speed may be low-pass filtered to obtain a more accurate actual generator speed, but is not limited thereto.
And 105, generating a variable pitch control instruction according to the rotation speed difference.
In some embodiments, when the rotation speed difference is that the set value of the rotation speed of the generator is greater than the actual value of the rotation speed of the generator, the rotation speed difference is sent to a rotation speed-variable pitch proportional-integral-derivative controller of the wind generating set, a pitch angle value corresponding to the increased rotation speed difference is determined through calculation, and a variable pitch control instruction is generated according to the pitch angle value.
In other embodiments, when the rotation speed difference is that the set value of the rotation speed of the generator is smaller than the actual value of the rotation speed of the generator, the rotation speed difference is sent to a rotation speed-variable pitch proportional-integral-derivative controller of the wind generating set, a pitch angle value corresponding to the reduction of the rotation speed difference is determined through calculation, and a variable pitch instruction is generated according to the pitch angle value.
The rotation speed-pitch proportional-integral-derivative controller may be a proportional-integral controller (PI), but is not limited thereto.
And 106, sending the variable pitch control instruction to a variable pitch executing mechanism of the wind generating set so that the variable pitch executing mechanism performs variable pitch control based on the variable pitch control instruction.
In some embodiments, when the generated pitch command is a pitch angle value corresponding to the increased rotational speed difference, the pitch actuator increases the pitch angle value.
In other embodiments, when the generated pitch variation instruction is to reduce a pitch angle value corresponding to the rotational speed difference, the pitch variation actuating mechanism reduces the pitch angle value, and therefore, the pitch angle corresponding to the rotational speed difference is used for controlling the pitch variation actuating mechanism to adjust rapidly, so that the rotational speed is controlled, and the purpose of active power adjustment is achieved.
The application provides a control method of a wind generating set, which comprises the steps of receiving an active power instruction value of an AGC system at a power grid dispatching end, obtaining a generator rotating speed set value corresponding to the active power instruction value, obtaining an actual generator rotating speed value of the wind generating set, subtracting the actual generator rotating speed value from the generator rotating speed set value, generating a variable pitch control instruction according to the obtained rotating speed difference, and controlling a variable pitch execution mechanism to carry out variable pitch control based on the variable pitch control instruction.
Fig. 2 is a schematic flow chart of another control method of a wind turbine generator system according to an embodiment of the present application.
In some embodiments, multiple sample active powers of the wind turbine generator set with sequentially increasing power may be obtained, for example, 100 sample active powers with increasing power from 0kW to the rated power of the wind turbine generator set may be obtained, but not limited thereto.
In other embodiments, a plurality of sample generator speeds of the wind turbine generator set with sequentially increasing speeds may be obtained, for example, a sample generator speed with 100 increasing speeds from the grid-connected speed to the rated speed of the wind turbine generator set may be obtained, but is not limited thereto.
And 202, determining a generator rotating speed set value corresponding to the sample active power according to the optimal gain of the wind generating set under the conditions that the sample active power is in a preset power interval and the sample generator rotating speed is in a preset rotating speed interval aiming at each sample active power.
In some embodiments, the preset power interval may be from 0kW to a rated power of the wind turbine generator set, but is not limited thereto.
The preset rotation speed interval may be from a grid-connected rotation speed to a rated rotation speed of the wind turbine generator system, but is not limited thereto.
In other embodiments, for each sample active power PowerReference, under the condition that the sample active power is between 0kW and the rated power of the wind turbine generator set, and the sample generator rotation speed is between the grid-connected rotation speed and the rated rotation speed of the wind turbine generator set, the generator rotation speed set value omegaSP corresponding to the sample active power may be determined according to the optimal gain Kopt of the wind turbine generator set.
The calculation method of the set value omegaSP of the rotating speed of the generator may be as follows:
omegaSP＝(PowerReference/Kopt)^(1/3)
the calculation formula is Kopt = row pi R5 Cpmax/(2 lamdaopt 3), wherein row is air density, pi is circumferential ratio, R is impeller diameter, cpmax is optimal wind energy utilization coefficient, and lamdaopt is tip speed ratio under the optimal wind energy utilization coefficient.
And 203, taking the rated rotating speed of the generator of the wind generating set as a rotating speed set value of the generator corresponding to the sample active power under the condition that the sample active power is not in the preset power interval and/or the rotating speed of the sample generator is not in the preset rotating speed interval.
In some embodiments, for each sample power PowerReference, in the case that the sample active power is not between 0kW and the rated power of the wind generating set, and/or the sample generator speed is not between the grid-connected speed and the rated speed of the wind generating set, the generator rated speed of the wind generating set is taken as the generator speed set value corresponding to the sample active power. That is, the generator speed set value omegaSP may be calculated by:
omegaSP＝Ratedomega
wherein Ratedomega is the rated rotating speed of the wind generating set.
And step 204, establishing a corresponding relation between the active power and the set value of the rotating speed of the generator according to the active power of each sample and the set value of the rotating speed of the generator corresponding to the active power of each sample.
In some embodiments, a two-dimensional table of active power and generator speed set-points may be established according to a correspondence relationship between each sample active power and a corresponding generator speed set-point, wherein each sample active power PowerReference has a unique correspondence relationship with the generator speed set-point omegaSP.
And step 205, receiving an active power instruction value of an AGC system at a power grid dispatching end.
And step 206, obtaining a generator rotating speed set value corresponding to the active power instruction value from the corresponding relation between the active power and the generator rotating speed set value.
In some embodiments, the corresponding relationship between the active power and the set value of the generator speed may be a two-dimensional table, and according to the active power corresponding to the active power command value, the set value of the generator speed uniquely corresponding to the active power command value is queried from the two-dimensional table.
And step 207, acquiring an actual generator rotating speed value of the wind generating set.
And step 208, subtracting the actual generator rotating speed value from the set generator rotating speed value to obtain a rotating speed difference.
And 209, generating a variable pitch control instruction according to the rotation speed difference.
And step 210, sending the variable pitch control instruction to a variable pitch executing mechanism of the wind generating set so that the variable pitch executing mechanism performs variable pitch control based on the variable pitch control instruction.
It should be noted that, for a specific implementation manner of step 207 to step 210, reference may be made to the relevant description in the foregoing embodiments.
The application provides a control method of a wind generating set, which comprises the steps of obtaining a plurality of sample active powers of the wind generating set and sample generator rotating speeds corresponding to the sample active powers, establishing a corresponding relation between the active powers and a generator rotating speed set value, establishing a two-dimensional table, receiving an active power instruction value of an AGC system at a power grid dispatching end, inputting the active power instruction value into the two-dimensional table for inquiring, obtaining a generator rotating speed set value corresponding to the active power instruction value, obtaining an actual generator rotating speed value of the wind generating set, subtracting the actual generator rotating speed value from the generator rotating speed set value, generating a variable pitch control instruction according to the obtained rotating speed difference, and controlling a variable pitch execution mechanism to carry out variable pitch control on the basis of the variable pitch control instruction.
Based on any one of the above embodiments, in order to further improve the stability and accuracy of the active power control of the wind turbine generator system, the control method of the wind turbine generator system according to the embodiment is further described below with reference to fig. 3, and fig. 3 is a schematic diagram of a semi-open loop control method of the active controlled wind turbine generator system according to the embodiment of the present application.
And 301, acquiring a plurality of sample active power PowerReferences of the wind generating set.
And step 304, judging whether the grid-connected rotating speed < omega < rated rotating speed is established or not.
And step 306, if the 0-straw power reference is not established and/or the grid-connected rotating speed is not established and the omega is not established, the rotating speed set value omega SP = rated rotating speed Ratedomega.
And step 308, acquiring an active power instruction value DemandPowerReference of the AGC system of the power grid dispatching terminal.
And 310, acquiring an actual generator rotating speed value g _ omega of the wind generating set.
And 311, obtaining an actual generator rotating speed value lpf _ omega of the wind generating set after low-pass filtering.
In step 312, a rotation speed difference omega _ error between the generator speed set value omega SP and the filtered actual generator speed value lpf _ omega is obtained.
And step 313, inputting the rotating speed difference omega _ error into the pitch PI controller.
And step 314, acquiring the generated Pitch control command Pitch _ demand.
And step 315, the variable Pitch executing mechanism performs variable Pitch control based on the variable Pitch control command Pitch _ demand.
In conclusion, based on the obtained PowerReference of the multiple samples of the wind generating set and the sample generator rotation speed omega corresponding to the active power of each sample, judging a plurality of sample active power PowerReferences and corresponding sample generator rotating speeds omega, in the case of the PowerReference for each sample active power, in the case of the PowerReference for sample active power being between 0kW and the rated power of the wind energy plant, and under the condition that the sample generator rotating speed omega is between the grid-connected rotating speed and the rated rotating speed of the wind generating set, the generator rotating speed set value omegaSP corresponding to the sample active power can be determined according to the optimal gain Kopt of the wind generating set, when the sample active power PowerReference is not between 0kW and the rated power of the wind turbine generator set, and/or under the condition that the sample generator speed omega is not between the grid-connected speed and the rated speed of the wind generating set, the set value omegaSP of the rotating speed of the generator is equal to the rated rotating speed Ratedomega of the generator set, therefore, a two-dimensional table between the active power reference and the generator rotating speed set value omegaSP is established according to the active power reference of each sample and the corresponding generator rotating speed set value omegaSP, when the active power instruction value DemandPowerReference of the AGC system at the dispatching end of the power grid is obtained, and inputting the active power reference corresponding to the active power command value DemandPowerReference into the two-dimensional table, so as to inquire the set value omegaSP of the rotating speed of the generator corresponding to the power reference, and obtaining an actual generator rotating speed value g _ omega of the wind generating set, performing low-pass filtering, making a difference between a set generator rotating speed value omegaSP and the filtered actual generator rotating speed value lpf _ omega, inputting the obtained rotating speed difference omega _ error into a Pitch control PI controller for calculation to generate a Pitch control command Pitch _ demand, and the variable Pitch executing mechanism performs variable Pitch control based on the variable Pitch control command Pitch _ demand. Therefore, half-open loop control of the wind generating set under active control is achieved, and the influence of active power control caused by mutual coupling of a plurality of active power control loops is avoided.
Fig. 4 is a schematic structural diagram of a control device of a wind turbine generator system according to an embodiment of the present application.
As shown in fig. 4, the control device 400 of the wind turbine generator system includes:
the receiving module 401 is configured to receive an active power instruction value of an AGC system at a power grid dispatching end.
A first obtaining module 402, configured to obtain a generator rotation speed set value corresponding to the active power instruction value.
And a second obtaining module 403, configured to obtain an actual generator rotation speed value of the wind turbine generator set.
The calculation module 404 is configured to subtract the actual generator speed value from the generator speed set value to obtain a speed difference.
And a generating module 405, configured to generate a pitch control instruction according to the rotational speed difference.
And the control module 406 is configured to send the pitch control instruction to a pitch actuator of the wind turbine generator system, so that the pitch actuator performs pitch control based on the pitch control instruction.
In an embodiment of the present application, as shown in fig. 5, the first obtaining module 402 is specifically configured to:
and acquiring active power corresponding to the active power instruction value.
And obtaining a generator rotating speed set value corresponding to the active power according to a pre-established corresponding relation between the active power and the generator rotating speed set value.
In one embodiment of the present application, as shown in fig. 5, the apparatus further comprises:
and a third obtaining module 407, configured to obtain multiple sample active powers of the wind turbine generator system and a sample generator rotation speed corresponding to each sample active power.
The first determining module 408 is configured to determine, for each sample active power, a generator rotation speed set value corresponding to the sample active power according to the optimal gain of the wind turbine generator set when the sample active power is within a preset power interval and the sample generator rotation speed is within a preset rotation speed interval.
And the second determining module 409 is configured to, when the sample active power is not in the preset power interval and/or the sample generator rotation speed is not in the preset rotation speed interval, use the generator rated rotation speed of the wind turbine generator as a generator rotation speed set value corresponding to the sample active power.
The establishing module 410 is configured to establish a corresponding relationship between the active power and a set generator speed value according to the active power of each sample and the set generator speed value corresponding to the active power.
In an embodiment of the present application, as shown in fig. 5, the control module 406 is specifically configured to:
and under the condition that the set value of the rotating speed of the generator is greater than the actual rotating speed value of the generator, the variable pitch control instruction is a pitch angle value corresponding to the increased rotating speed difference, and the variable pitch actuating mechanism increases the pitch angle value.
In an embodiment of the present application, as shown in fig. 5, the control module 406 is further specifically configured to:
and under the condition that the set value of the rotating speed of the generator is smaller than the actual rotating speed value of the generator, the variable pitch control instruction is a pitch angle value corresponding to the reduction of the rotating speed difference, and the variable pitch actuating mechanism reduces the pitch angle value.
In one embodiment of the present application, as shown in fig. 5, the apparatus further comprises:
and the filtering module 411 is used for performing filtering processing on the actual rotating speed of the generator.
The application provides a wind generating set's controlling means, through receiving the active power instruction value of electric wire netting dispatch end AGC system, in order to obtain the generator rotational speed setting value that corresponds with the active power instruction value, and obtain wind generating set's actual generator rotational speed value, subtract actual generator rotational speed value with generator rotational speed setting value, in order to be according to the rotational speed difference that obtains, generate and become oar control instruction, and control and become oar actuating mechanism and carry out the oar control based on becoming oar control instruction, therefore, based on the active power instruction of electric wire netting dispatch end AGC system, carry out real-time control to wind generating set through becoming oar actuating mechanism, realize the half-open loop control of active control's wind generating set, improve wind generating set's active power control stability and the precision under the active power instruction.
FIG. 6 is a block diagram of an electronic device according to an embodiment of the application.
As shown in fig. 6, the electronic device includes:
When the processor 602 executes the instructions, the control method of the wind turbine generator system provided in the above embodiment is implemented.
Further, the electronic device further includes:
a communication interface 603 for communication between the memory 601 and the processor 602.
The memory 601 is used for storing computer instructions executable on the processor 602.
And the processor 602 is configured to implement the control method of the wind turbine generator set according to the above embodiments when executing the program.
If the memory 601, the processor 602 and the communication interface 603 are implemented independently, the communication interface 603, the memory 601 and the processor 602 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 6, but this is not intended to represent only one bus or type of bus.
Optionally, in a specific implementation, if the memory 601, the processor 602, and the communication interface 603 are integrated on a chip, the memory 601, the processor 602, and the communication interface 603 may complete mutual communication through an internal interface.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A method of controlling a wind turbine generator system, the method comprising:
receiving an active power instruction value of an AGC system of a power grid dispatching terminal;
acquiring a set value of the rotating speed of the generator corresponding to the active power instruction value;
acquiring an actual generator rotating speed value of the wind generating set;
subtracting the actual generator rotating speed value from the generator rotating speed set value to obtain a rotating speed difference;
generating a variable pitch control instruction according to the rotation speed difference;
sending the variable pitch control instruction to a variable pitch executing mechanism of the wind generating set so that the variable pitch executing mechanism performs variable pitch control based on the variable pitch control instruction;
the obtaining of the set value of the rotating speed of the generator corresponding to the active power instruction value includes:
obtaining active power corresponding to the active power instruction value;
according to a pre-established corresponding relation between active power and a set rotating speed value of a generator, obtaining a set rotating speed value of the generator corresponding to the active power;
before the receiving the active power instruction value of the power grid dispatching terminal AGC system, the method further comprises the following steps:
obtaining a plurality of sample active powers of the wind generating set and a sample generator rotating speed corresponding to each sample active power;
aiming at each sample active power, under the condition that the sample active power is in a preset power interval and the sample generator rotating speed is in a preset rotating speed interval, determining a generator rotating speed set value corresponding to the sample active power according to the optimal gain of the wind generating set;
taking the rated rotating speed of the generator of the wind generating set as a rotating speed set value of the generator corresponding to the sample active power under the condition that the sample active power is not in a preset power interval and/or the rotating speed of the sample generator is not in a preset rotating speed interval;
and establishing a corresponding relation between the active power and the set value of the rotating speed of the generator according to the active power of each sample and the set value of the rotating speed of the generator corresponding to the active power of each sample.
2. The method of claim 1, wherein the sending the pitch control instructions to a pitch actuator of the wind turbine generator system to cause the pitch actuator to perform pitch control based on the pitch control instructions comprises:
and under the condition that the set value of the rotating speed of the generator is greater than the actual rotating speed value of the generator, the variable pitch control instruction is a pitch angle value corresponding to the increased rotating speed difference, and the pitch angle value is increased by the variable pitch executing mechanism.
3. The method of claim 2, wherein the method further comprises:
and under the condition that the set value of the rotating speed of the generator is smaller than the actual rotating speed value of the generator, the variable pitch control instruction is a pitch angle value corresponding to the reduced rotating speed difference, and the variable pitch executing mechanism reduces the pitch angle value.
4. The method of claim 1, wherein prior to said subtracting said actual generator speed from said generator speed to obtain a speed difference, said method further comprises:
and carrying out filtering processing on the actual rotating speed of the generator.
5. A control device for a wind turbine, characterized in that it comprises:
the receiving module is used for receiving an active power instruction value of an AGC system of a power grid dispatching terminal;
the first obtaining module is used for obtaining a set value of the rotating speed of the generator corresponding to the active power instruction value;
the second acquisition module is used for acquiring the actual generator rotating speed value of the wind generating set;
the calculation module is used for subtracting the actual generator rotating speed value from the set generator rotating speed value to obtain a rotating speed difference;
the generating module is used for generating a variable pitch control instruction according to the rotating speed difference;
the control module is used for sending the variable pitch control instruction to a variable pitch actuating mechanism of the wind generating set so that the variable pitch actuating mechanism performs variable pitch control based on the variable pitch control instruction;
the first obtaining module is specifically configured to:
obtaining active power corresponding to the active power instruction value;
according to a pre-established corresponding relation between active power and a set value of the rotating speed of a generator, obtaining a set value of the rotating speed of the generator corresponding to the active power;
the device further comprises:
the third obtaining module is used for obtaining a plurality of sample active powers of the wind generating set and the rotating speed of the sample generator corresponding to each sample active power;
the first determining module is used for determining a generator rotating speed set value corresponding to the sample active power according to the optimal gain of the wind generating set under the condition that the sample active power is in a preset power interval and the sample generator rotating speed is in a preset rotating speed interval aiming at each sample active power;
the second determining module is used for taking the rated rotating speed of the generator of the wind generating set as a rotating speed set value of the generator corresponding to the sample active power under the condition that the sample active power is not in a preset power interval and/or the rotating speed of the sample generator is not in a preset rotating speed interval;
and the establishing module is used for establishing a corresponding relation between the active power and the set value of the rotating speed of the generator according to the active power of each sample and the set value of the rotating speed of the generator corresponding to the active power.
6. The apparatus of claim 5, wherein the control module is specifically configured to:
and under the condition that the set value of the rotating speed of the generator is greater than the actual rotating speed value of the generator, the variable pitch control instruction is to increase a pitch angle value corresponding to the rotating speed difference, and the variable pitch executing mechanism increases the pitch angle value.
7. The apparatus of claim 6, wherein the control module is further specifically configured to:
and under the condition that the set value of the rotating speed of the generator is smaller than the actual rotating speed value of the generator, the variable pitch control instruction is a pitch angle value corresponding to the reduced rotating speed difference, and the variable pitch executing mechanism reduces the pitch angle value.
8. The apparatus of claim 5, wherein the apparatus further comprises:
and the filtering module is used for carrying out filtering processing on the actual rotating speed of the generator.
9. An electronic device, comprising:
memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor when executing the program implements the method of controlling a wind park according to any of claims 1-4.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, carries out the method of controlling a wind park according to any one of claims 1-4.
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