CN113669196A - Control method and device of wind generating set and electronic equipment - Google Patents

Control method and device of wind generating set and electronic equipment Download PDF

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Publication number
CN113669196A
CN113669196A CN202111145065.1A CN202111145065A CN113669196A CN 113669196 A CN113669196 A CN 113669196A CN 202111145065 A CN202111145065 A CN 202111145065A CN 113669196 A CN113669196 A CN 113669196A
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value
determining
frequency value
grid
target
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CN113669196B (en
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金强
蔡安民
郭辰
林伟荣
焦冲
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Huaneng Jilin Power Generation Co ltd
Huaneng Clean Energy Research Institute
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Huaneng Clean Energy Research Institute
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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 
    • 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
    • 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
    • F05B2270/328—Blade pitch angle
    • 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
    • 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
    • F05B2270/70—Type of control algorithm
    • F05B2270/706—Type of control algorithm proportional-integral-differential
    • 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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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Eletrric Generators (AREA)
  • Wind Motors (AREA)

Abstract

The disclosure provides a control method and device of a wind generating set, electronic equipment and a storage medium, and relates to the technical field of wind power generation. The method comprises the following steps: acquiring a grid-connected point frequency value, a target frequency value and a target rotating speed value of a generator in a wind generating set; determining a rotation speed difference value of the generator according to the rotation speed value of the generator at the current moment and the target rotation speed value; determining a corresponding rotation speed increment according to the grid-connected point frequency value and the target frequency value; and determining a variable pitch instruction according to the rotation speed difference and the rotation speed increment of the generator. Therefore, in the process of pitch control, the frequency value of the grid-connected point is fully considered, and the rotating speed difference value is concerned, so that the accuracy of the pitch instruction is improved, the accuracy of the control of the wind generating set is ensured, and conditions are provided for guaranteeing the performance of the wind generating set.

Description

Control method and device of wind generating set and electronic equipment
Technical Field
The disclosure relates to the technical field of wind power generation, in particular to a control method and device of a wind generating set and electronic equipment.
Background
With the progress of science and technology, the development of the wind power generation technology is faster and faster, and the application range is wider and wider. With the increasing incorporation of more and more wind generating sets into the power grid, the wind power generation has the characteristics of randomness, intermittency and the like, so that the influence on the frequency of the power grid is increased, and the performance of the wind power generation may be influenced.
In the related art, the power of the wind turbine generator set is adjusted through a variable pitch operation to control the rotating speed of the wind turbine generator to be at a target value, so that the stability of the wind turbine generator set is maintained. However, the time required for the pitch control instruction from generation to execution may be different, and if the time is too long, the rotation speed of the generator may not be effectively controlled at the target value when the pitch control instruction is executed, so that the accuracy of controlling the wind turbine generator system may be reduced.
Disclosure of Invention
The present disclosure is directed to solving, at least to some extent, one of the technical problems in the related art.
An embodiment of a first aspect of the present disclosure provides a control method for a wind turbine generator system, including:
acquiring a grid-connected point frequency value, a target frequency value and a target rotating speed value of a generator in the wind generating set;
determining a rotation speed difference value of the generator according to the rotation speed value of the generator at the current moment and the target rotation speed value;
determining a corresponding rotation speed increment according to the grid-connected point frequency value and the target frequency value;
and determining a variable pitch instruction according to the generator rotation speed difference value and the rotation speed increment.
Optionally, after the obtaining of the grid-connected point frequency value and the target frequency value, the method further includes:
determining a frequency difference value between the grid-connected point frequency value and the target frequency value according to the grid-connected point frequency value and the target frequency value;
and determining a target rotating speed value of the generator under the condition that the frequency difference value is larger than the dead zone frequency value.
Optionally, the determining a target rotation speed value of the generator includes:
determining the frequency modulation active power according to the grid-connected point frequency value, the dead zone frequency value, the target frequency value, the modulation rate difference and the initial active power value;
determining total frequency modulation active power according to the active power at the current moment and the frequency modulation active power;
and determining a target rotating speed value of the generator according to the total frequency modulation active power.
Optionally, the determining a corresponding rotation speed increment according to the grid-connected point frequency value and the target frequency value includes:
determining a target frequency range corresponding to the grid-connected point frequency value according to the relation between the grid-connected point frequency value and a preset frequency range;
determining a corresponding rotation speed increment value according to the target frequency range;
and determining the sign of the rotating speed increment according to the relation between the grid-connected point frequency value and the target frequency value.
Optionally, the determining the sign of the rotation speed increment according to the relationship between the grid-connected point frequency value and the target frequency value includes:
determining that the rotating speed increment sign is negative under the condition that the grid-connected point frequency value is greater than a target frequency value;
and determining that the rotating speed increment sign is positive under the condition that the grid-connected point frequency value is less than or equal to the target frequency value.
Optionally, the determining a pitch instruction according to the rotation speed difference of the generator and the rotation speed increment includes:
inputting the rotating speed difference value of the generator and the rotating speed increment into a preset controller to determine a variable pitch instruction;
and sending the variable pitch instruction to a variable pitch executing mechanism so as to enable the variable pitch executing mechanism to perform variable pitch operation.
Optionally, the controller is a proportional-integral-derivative PID controller.
An embodiment of a second aspect of the present disclosure provides a control device of a wind generating set, including:
the acquisition module is used for acquiring a grid-connected point frequency value, a target frequency value and a target rotating speed value of a generator in the wind generating set;
the first determining module is used for determining a rotating speed difference value of the generator according to the rotating speed value of the generator at the current moment and the target rotating speed value;
the second determining module is used for determining corresponding rotating speed increment according to the grid-connected point frequency value and the target frequency value;
and the third determining module is used for determining a variable pitch instruction according to the rotating speed difference value of the generator and the rotating speed increment.
Optionally, the first determining module is further configured to:
determining a frequency difference value between the grid-connected point frequency value and the target frequency value according to the grid-connected point frequency value and the target frequency value;
and determining a target rotating speed value of the generator under the condition that the frequency difference value is larger than the dead zone frequency value.
Optionally, the first determining module is specifically configured to:
determining the frequency modulation active power according to the grid-connected point frequency value, the dead zone frequency value, the target frequency value, the modulation rate difference and the initial active power value;
determining total frequency modulation active power according to the active power at the current moment and the frequency modulation active power;
and determining a target rotating speed value of the generator according to the total frequency modulation active power.
Optionally, the second determining module includes:
the first determining unit is used for determining a target frequency range corresponding to the grid-connected point frequency value according to the relation between the grid-connected point frequency value and a preset frequency range;
the second determining unit is used for determining a corresponding rotating speed increment value according to the target frequency range;
and the third determining unit is used for determining the symbol of the rotating speed increment according to the relation between the grid-connected point frequency value and the target frequency value.
Optionally, the third determining unit is specifically configured to:
determining that the rotating speed increment sign is negative under the condition that the grid-connected point frequency value is greater than a target frequency value;
and determining that the rotating speed increment sign is positive under the condition that the grid-connected point frequency value is less than or equal to the target frequency value.
Optionally, the third determining module is specifically configured to:
inputting the rotating speed difference value of the generator and the rotating speed increment into a preset controller to determine a variable pitch instruction;
and sending the variable pitch instruction to a variable pitch executing mechanism so as to enable the variable pitch executing mechanism to perform variable pitch operation.
Optionally, the controller is a proportional-integral-derivative PID controller.
An embodiment of a third aspect of the present disclosure provides an electronic device, including: the control method comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the control method of the wind generating set according to the embodiment of the first aspect of the disclosure.
A fourth aspect of the present disclosure provides a non-transitory computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, implements the control method for a wind turbine generator set as set forth in the first aspect of the present disclosure.
A fifth aspect of the present disclosure provides a computer program product, which when executed by an instruction processor in the computer program product performs the control method of the wind turbine generator set provided in the first aspect of the present disclosure.
According to the control method, the control device and the electronic equipment of the wind generating set, the grid-connected point frequency value, the target frequency value and the target rotating speed value of the generator in the wind generating set can be obtained firstly, then the rotating speed difference value of the generator is determined according to the rotating speed value and the target rotating speed value of the generator at the current moment, then the corresponding rotating speed increment is determined according to the grid-connected point frequency value and the target frequency value, and then the variable pitch instruction is determined according to the rotating speed difference value and the rotating speed increment of the generator. Therefore, in the process of pitch control, the frequency value of the grid-connected point is fully considered, and the rotating speed difference value is concerned, so that the accuracy of the pitch instruction is improved, the accuracy of the control of the wind generating set is ensured, and conditions are provided for guaranteeing the performance of the wind generating set.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
Fig. 1 is a schematic flow chart of a control method of a wind turbine generator system according to another embodiment of the present disclosure;
fig. 2 is a schematic flow chart of a control method of a wind turbine generator system according to another embodiment of the present disclosure;
fig. 2A is a control flow chart of a wind turbine generator system according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a control device of a wind turbine generator system according to another embodiment of the present disclosure;
FIG. 4 illustrates a block diagram of an exemplary electronic device suitable for use in implementing embodiments of the present disclosure.
Detailed Description
Reference will now be made in detail to the embodiments of the present disclosure, 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 functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present disclosure, and should not be construed as limiting the present disclosure.
The following describes a control method, a control device and an electronic device of a wind turbine generator system according to an embodiment of the present disclosure with reference to the drawings.
The control method of the wind generating set of the embodiment of the disclosure can be executed by the control device of the wind generating set provided by the embodiment of the disclosure, and the device can be configured in electronic equipment.
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 the steps of:
step 101, obtaining a grid-connected point frequency value, a target frequency value and a target rotating speed value of a generator in a wind generating set.
Wherein, the grid-connected point frequency value can be obtained in various ways. For example, the grid-connected point frequency value may be determined by a measurement method, or may also be read by an instrument or a device, which is not limited in this disclosure.
It should be noted that, in the embodiment of the present disclosure, any desirable way may be adopted to obtain the grid-connected point frequency value, and the present disclosure does not limit this.
In addition, the target frequency value may be a value set in advance, for example, may be 50 hertz (Hz), 50.5Hz, and the like, which is not limited in this disclosure.
In addition, the target rotating speed value of the generator in the wind generating set can be a preset value, for example, the target rotating speed value can be a rated rotating speed; alternatively, the target rotation speed value may be determined in other manners, for example, in a case that the power value is equal to the rotation speed value multiplied by the torque value, the target rotation speed value may be determined according to the power and torque values, and the disclosure is not limited thereto.
It can be understood that frequency is an important index for measuring the quality of electric energy. Therefore, in the embodiment of the present disclosure, when the grid-connected point frequency value deviates from the target frequency value, the wind turbine generator set may be further controlled by combining the grid-connected point frequency value and the rotation speed value of the generator, so as to maintain a stable automatic control process.
And 102, determining a rotation speed difference value of the generator according to the rotation speed value of the generator at the current moment and the target rotation speed value.
It should be noted that the rotation speed value of the generator at the current time may be determined in any desirable manner, for example, the rotation speed value of the generator at the current time may be determined by a rotation speed sensor, or the rotation speed value of the generator at the current time may also be determined by other instruments or devices, and the disclosure is not limited thereto.
In addition, the target rotation speed value may be a preset value, such as a rated rotation speed, a certain rotation speed value, or the like, or may be determined in other manners, which is not limited in this disclosure.
Optionally, after the rotating speed value of the generator at the current moment and the target rotating speed value are determined, the target rotating speed value may be subtracted from the rotating speed value of the generator at the current moment, and an obtained result is a rotating speed difference value of the generator.
And 103, determining a corresponding rotating speed increment according to the grid-connected point frequency value and the target frequency value.
It is understood that, in the embodiment of the present disclosure, after determining the grid-connected point frequency value and the target frequency value, the grid-connected point frequency value may be subtracted from the target frequency value, and the obtained result is the frequency difference.
Alternatively, the correspondence between the frequency difference and the rotation speed increment may be set in advance.
For example, setting in advance: the frequency difference is-15, and the corresponding rotation speed increment is deltaomega 1; the frequency difference is-5, and the corresponding rotational speed increment is deltaomega 2; the frequency difference is +10, the corresponding rotational speed increment is deltaomega3, etc., which is not limited by this disclosure.
Therefore, in the embodiment of the present disclosure, a frequency difference between the target frequency value and the grid-connected point frequency value may be determined, and then, traversal search may be performed in a preset correspondence between the frequency difference and the rotation speed increment according to the frequency difference, so as to determine the rotation speed increment corresponding to the frequency difference, which is not limited in the present disclosure.
And step 104, determining a pitch variation instruction according to the rotation speed difference value and the rotation speed increment of the generator.
Optionally, the rotation speed difference and the rotation speed increment of the generator may be input into a preset controller to determine a pitch instruction, and then the pitch instruction is sent to the pitch actuator, so that the pitch actuator performs a pitch operation.
Optionally, the controller may be a proportional-integral-derivative (PID) controller, or may also be a proportional-integral (PI) controller, or may also be a Linear Quadratic Regulator (LQR), and the like, which is not limited in this disclosure.
Optionally, the rotation speed difference and the rotation speed increment may be fused, the total rotation speed difference is determined first, and then the pitch instruction may be determined according to the rotation speed-pitch control and the total rotation speed difference.
For example, the rotational speed difference may be added to the rotational speed increment, and the result may be used as the total rotational speed difference. Or, the set respective weights of the rotation speed difference and the rotation speed increment may be weighted and fused according to the weights, and the obtained result is the total rotation speed difference. The present disclosure is not limited thereto. In addition, the rotation speed-pitch control may be any rotation speed-pitch control loop, or may also be any controller, such as a PID controller, a PI controller, and the like, which is not limited in this disclosure.
According to the embodiment of the disclosure, a grid-connected point frequency value, a target frequency value and a target rotating speed value of a generator in a wind generating set can be obtained first, then a rotating speed difference value of the generator is determined according to the rotating speed value of the generator at the current moment and the target rotating speed value, then a corresponding rotating speed increment is determined according to the grid-connected point frequency value and the target frequency value, and then a pitch instruction is determined according to the rotating speed difference value and the rotating speed increment of the generator. Therefore, in the process of pitch control, the frequency value of the grid-connected point is fully considered, and the rotating speed difference value is concerned, so that the accuracy of the pitch instruction is improved, the accuracy of the control of the wind generating set is ensured, and conditions are provided for guaranteeing the performance of the wind generating set.
Fig. 2 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. 2, the control method of the wind turbine generator set may include the steps of:
step 201, determining a frequency difference value between the grid-connected point frequency value and the target frequency value according to the grid-connected point frequency value and the target frequency value.
The difference between the grid-connected point frequency value and the target frequency value can be obtained, and the obtained result is the frequency difference value between the two. For example, the frequency value of the grid-connected point may be subtracted from the target frequency value, and the obtained result is a frequency difference value, which is not limited in this disclosure.
And 202, under the condition that the frequency difference value is larger than the dead zone frequency value, determining a target rotating speed value of the generator.
The dead zone frequency value may be a value set in advance, or may also be adjusted according to needs, and the like, which is not limited in this disclosure. It is understood that the target rotation speed value of the generator may be a value set in advance, or may be determined according to other manners, which is not limited by the present disclosure.
Optionally, the frequency modulation active power may be determined according to the grid-connected point frequency value, the dead zone frequency value, the target frequency value, the modulation rate difference, and the active power initial value.
The grid-connected point frequency value, the dead zone frequency value, the target frequency value, the modulation rate difference and the initial active power value can satisfy the following relations:
Figure BDA0003285305530000041
wherein P is the frequency modulation active power, P0Is the initial value of active power, delta% is the rate of difference, PNIs rated power, f is the frequency value of the grid-connected point, fdIs the dead band frequency value, fNIs the target frequency value.
And then, determining the total frequency modulation active power according to the active power and the frequency modulation active power at the current moment, and determining the target rotating speed value of the generator according to the total frequency modulation active power.
The active power at the current moment can be added to the frequency modulation power, and the obtained result is the total frequency modulation active power; or the active power at the current time may be weighted and fused with the frequency modulation power to determine the total frequency modulation active power, and the like, which is not limited in this disclosure.
In addition, the total modulation power may satisfy the following relationship:
Psum＝Tpfc*ωpfc (2)
Tpfc＝kopt*ωnow*ωnow (3)
wherein, PsumFor total modulated power, TpfcIs a target torque value, ωpfcFor a target speed value, kopt is the optimal gain value, ωpfcIs the target rotating speed value of the generator.
It should be noted that the above examples are merely illustrative, and are not intended to limit the manner of determining the target rotation speed value of the generator in the embodiments of the present disclosure.
And step 203, determining a rotation speed difference value of the generator according to the rotation speed value of the generator at the current moment and the target rotation speed value.
And 204, determining a target frequency range corresponding to the grid-connected point frequency value according to the relation between the grid-connected point frequency value and a preset frequency range.
It is understood that the respective frequency ranges may be set in advance, and the present disclosure is not limited thereto.
For example, the frequency range 1 may be set in advance as: 46Hz to 48Hz, frequency range 2: 48Hz to 50Hz, frequency range 3: 50Hz to 52Hz, frequency range 4: 52Hz to 54Hz, etc. If the grid-connected point frequency value is 47Hz, it can be determined that the target frequency range corresponding to the grid-connected point frequency value is frequency range 1.
It should be noted that the above examples are only illustrative, and should not be taken as limitations on the frequency range, the grid-connected point frequency value, the target frequency range, and the like in the embodiments of the present disclosure.
Step 205, determining a corresponding rotation speed increment value according to the target frequency range.
It is understood that the target frequency ranges may be different, and the corresponding speed increment values may be the same, or may be different, etc., and the disclosure is not limited thereto.
For example, the target frequency range is frequency range 1, and the corresponding increment value of the rotation speed may be deltaomega 1; the target frequency range is frequency range 2, and the corresponding rotating speed increment value can be deltaomega 2; the target frequency range is frequency range 3, and the corresponding rotating speed increment value can be deltaomega 3; the target frequency range is frequency range 4, and the corresponding increment value of the rotation speed can be deltaomega4, etc., which is not limited by the disclosure.
And step 206, determining the symbol of the rotating speed increment according to the relation between the grid-connected point frequency value and the target frequency value.
The sign of the increment of the rotation speed may be plus "+", or may also be minus "-", etc., which is not limited in this disclosure.
Optionally, the rotation speed increment sign may be determined to be negative when the grid-connected point frequency value is greater than the target frequency value; and determining the rotating speed increment sign to be positive under the condition that the frequency value of the grid-connected point is less than or equal to the target frequency value.
For example, the frequency value of the grid-connected point is 49Hz, and the target frequency value is 50 Hz. If the relation between the frequency value of the grid-connected point and the preset frequency range is searched, the target frequency range corresponding to the frequency value of the grid-connected point of 49Hz is determined to be the frequency range 1, and the corresponding increment value of the rotating speed is deltaomega 1. And if 49Hz is less than 50Hz, the sign of the rotation speed increment can be determined to be negative, so that the frequency value of the grid-connected point of 49Hz can be determined, and the corresponding rotation speed increment is as follows: deltaomega 1.
It should be noted that the above examples are only illustrative, and should not be taken as limitations on the grid connection point frequency value, the target frequency range, the rotation speed increment symbol, the rotation speed increment, and the like in the embodiments of the present disclosure.
And step 207, determining a pitch variation instruction according to the rotation speed difference value and the rotation speed increment of the generator.
It will be appreciated that the sign of the speed increment may be indicative of the speed at which the pitch command is executed. For example, if the rotation speed increment is positive, the speed of executing the pitch variation instruction can be increased, and the larger the rotation speed increment value is, the faster the speed of executing the pitch variation instruction is; correspondingly, if the rotating speed increment is negative, the speed of executing the pitch instruction can be reduced, and the larger the rotating speed increment value is, the slower the speed of executing the pitch instruction is, and the like. The present disclosure is not limited thereto.
Therefore, in the embodiment of the disclosure, the speed of executing the pitch instruction can be adjusted according to the symbol of the rotation speed increment and the rotation speed increment value, so that the pitch control is more accurate, and the control accuracy of the wind generating set is further improved.
It can be understood that the control method of the wind generating set provided by the disclosure can be applied to primary frequency modulation rotation speed control, so that the rotation speed increment of the generator can be scheduled by introducing a grid-connected point frequency value, and the scheduled rotation speed increment and rotation speed difference of the generator are used as the latest input of the rotation speed-variable pitch controller, so that the rotation speed-variable pitch controller can perform pitch control according to the adjusted rotation speed increment and rotation speed difference of the generator, thereby being capable of responding to the rotation speed control of the generator brought by the primary frequency modulation requirement more quickly, so that the rotation speed of the generator is controlled to reach a target rotation speed value more quickly, thereby improving the accuracy of controlling the wind generating set, and providing conditions for guaranteeing the performance of the wind generating set.
Optionally, the control method of the wind turbine generator system provided by the present disclosure may be applicable to any wind turbine generator system, such as a land wind turbine, an offshore wind turbine, and the like, which is not limited by the present disclosure.
The following describes a control flow of the wind turbine generator system provided by the present disclosure, taking fig. 2A as an example.
Fig. 2A is a control flowchart of a wind turbine generator system provided by the present disclosure.
As shown in fig. 2A, the dead zone frequency value f _ dead and the target frequency value f _ pfc may be determined in advance, and after the grid-connected point frequency value f is detected, the frequency difference between f and f _ pfc may be determined, and then it may be determined whether the frequency difference is greater than the dead zone frequency value f _ dead. Under the condition that the frequency difference value is larger than the dead zone frequency value f _ dead, the active power P _ now at the current moment is obtained, then the frequency modulation active power deltaP is calculated, and then the P _ now and the deltaP are added to determine the total frequency modulation active power P _ sum. And decomposing the total frequency modulation active power P _ sum to determine a target rotating speed value omega _ pfc of the generator, then obtaining a rotating speed value omega _ now of the generator at the current moment, and then determining a rotating speed difference omega _ diff of the generator according to the omega _ pfc and the omega _ now.
In addition, after the grid-connected point frequency value f is obtained, the relationship between the grid-connected point frequency value f and the preset frequency range can be judged. For example, the preset frequency ranges are respectively: 49.5Hz to 49.75Hz, 49.75Hz to 50.05Hz, 50.05Hz to 50.25Hz, 50.25Hz to 50.5 Hz. Firstly, judging whether the frequency value f of the grid-connected point is in the range of (49.5Hz to 49.75Hz), if so, searching a corresponding rotation speed increment deltaomega 1; if not, judging whether the frequency value f of the grid-connected point is in the range of (49.75Hz to 50.05Hz), and if so, searching a corresponding rotation speed increment deltaomega 2; if not, judging whether the frequency value f of the grid-connected point is in the range of (50.05Hz to 50.25Hz), and if so, searching a corresponding rotation speed increment deltaomega 3; if not, judging whether the frequency value f of the grid-connected point is in the range of (50.25Hz to 50.5Hz), if so, searching the corresponding deltaomega4 of the rotation speed increment, and if not, ending.
And then, the determined rotating speed difference of the generator and the determined rotating speed increment can be fused to determine a total rotating speed difference value of the generator, then the total rotating speed difference value of the generator is input into a rotating speed-variable pitch PID controller to determine a variable pitch instruction pitch _ pfcdemand, and then the variable pitch instruction pitch _ pfcdemand is sent to a variable pitch executing mechanism to enable the variable pitch executing mechanism to perform variable pitch operation.
It should be noted that the above examples are only illustrative, and should not be taken as limitations on the preset frequency range, the rotation speed-pitch controller, and the like in the embodiments of the present disclosure.
According to the embodiment of the disclosure, a frequency difference value between a grid connection point frequency value and a target frequency value is determined according to the grid connection point frequency value, then a target rotating speed value of a generator is determined under the condition that the frequency difference value is larger than a dead zone frequency value, then a rotating speed difference value of the generator is determined according to a rotating speed value and a target rotating speed value of the generator at the current moment, then a target frequency range corresponding to the grid connection point frequency value is determined according to a relation between the grid connection point frequency value and a preset frequency range, then a corresponding rotating speed increment value is determined according to the target frequency range, then a symbol of the rotating speed increment is determined according to a relation between the grid connection point frequency value and the target frequency value, and then a pitch control instruction is determined according to the rotating speed difference value and the rotating speed increment of the generator. Therefore, in the process of pitch control, the frequency value of the grid-connected point is fully considered, and the rotating speed difference value is concerned, so that the accuracy of the pitch instruction is improved, the accuracy of the control of the wind generating set is ensured, and conditions are provided for guaranteeing the performance of the wind generating set.
In order to realize the above embodiment, the present disclosure further provides a control device of a wind turbine generator system.
Fig. 3 is a schematic structural diagram of a control device of a wind turbine generator system provided in an embodiment of the present disclosure.
As shown in fig. 3, the control apparatus 100 of the wind turbine generator system may include: an acquisition module 110, a first determination module 120, a second determination module 130, and a third determination module 140.
The obtaining module 110 is configured to obtain a grid-connected point frequency value, a target frequency value, and a target rotation speed value of a generator in the wind turbine generator set.
The first determining module 120 is configured to determine a rotation speed difference of the generator according to the current rotation speed value of the generator and the target rotation speed value.
And a second determining module 130, configured to determine a corresponding rotation speed increment according to the grid-connected point frequency value and the target frequency value.
And a third determining module 140, configured to determine a pitch instruction according to the generator rotation speed difference and the rotation speed increment.
Optionally, the first determining module 120 is further configured to:
determining a frequency difference value between the grid-connected point frequency value and the target frequency value according to the grid-connected point frequency value and the target frequency value;
and determining a target rotating speed value of the generator under the condition that the frequency difference value is larger than the dead zone frequency value.
Optionally, the first determining module 120 is specifically configured to:
determining the frequency modulation active power according to the grid-connected point frequency value, the dead zone frequency value, the target frequency value, the modulation rate difference and the initial active power value;
determining total frequency modulation active power according to the active power at the current moment and the frequency modulation active power;
and determining a target rotating speed value of the generator according to the total frequency modulation active power.
Optionally, the second determining module 130 includes:
the first determining unit is used for determining a target frequency range corresponding to the grid-connected point frequency value according to the relation between the grid-connected point frequency value and a preset frequency range;
the second determining unit is used for determining a corresponding rotating speed increment value according to the target frequency range;
and the third determining unit is used for determining the symbol of the rotating speed increment according to the relation between the grid-connected point frequency value and the target frequency value.
Optionally, the third determining unit is specifically configured to:
determining that the rotating speed increment sign is negative under the condition that the grid-connected point frequency value is greater than a target frequency value;
and determining that the rotating speed increment sign is positive under the condition that the grid-connected point frequency value is less than or equal to the target frequency value.
Optionally, the third determining module 140 is specifically configured to:
inputting the rotating speed difference value of the generator and the rotating speed increment into a preset controller to determine a variable pitch instruction;
and sending the variable pitch instruction to a variable pitch executing mechanism so as to enable the variable pitch executing mechanism to perform variable pitch operation.
Optionally, the controller is a proportional-integral-derivative PID controller.
The functions and specific implementation principles of the modules in the embodiments of the present disclosure may refer to the embodiments of the methods, and are not described herein again.
The control device of the wind generating set provided by the embodiment of the disclosure may first obtain the grid-connected point frequency value, the target frequency value, and the target rotation speed value of the generator in the wind generating set, then determine the rotation speed difference value of the generator according to the rotation speed value of the generator at the current moment and the target rotation speed value, then determine the corresponding rotation speed increment according to the grid-connected point frequency value and the target frequency value, and then determine the pitch instruction according to the rotation speed difference value and the rotation speed increment of the generator. Therefore, in the process of pitch control, the frequency value of the grid-connected point is fully considered, and the rotating speed difference value is concerned, so that the accuracy of the pitch instruction is improved, the accuracy of the control of the wind generating set is ensured, and conditions are provided for guaranteeing the performance of the wind generating set.
In order to implement the above embodiments, the present disclosure also provides an electronic device, including: the control method of the wind generating set provided by the previous embodiment of the disclosure is realized when the processor executes the program.
In order to achieve the above embodiments, the present disclosure also proposes a non-transitory computer readable storage medium storing a computer program, which when executed by a processor implements the control method of the wind turbine generator set proposed by the foregoing embodiments of the present disclosure.
In order to implement the above embodiments, the present disclosure also proposes a computer program product, which when being executed by an instruction processor in the computer program product, executes the control method of the wind turbine generator set proposed by the foregoing embodiments of the present disclosure.
FIG. 4 illustrates a block diagram of an exemplary electronic device suitable for use in implementing embodiments of the present disclosure. The electronic device 12 shown in fig. 4 is only an example and should not bring any limitations to the functionality and scope of use of the embodiments of the present disclosure.
As shown in FIG. 4, electronic device 12 is embodied in the form of a general purpose computing device. The components of electronic device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16.
Bus 18 represents one or more of any of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, and a processor or local bus using any of a variety of bus architectures. These architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MAC) bus, enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus, to name a few.
Electronic device 12 typically includes a variety of computer system readable media. Such media may be any available media that is accessible by electronic device 12 and includes both volatile and nonvolatile media, removable and non-removable media.
Memory 28 may include computer system readable media in the form of volatile Memory, such as Random Access Memory (RAM) 30 and/or cache Memory 32. The electronic device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 4, and commonly referred to as a "hard drive"). Although not shown in FIG. 4, a disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a Compact disk Read Only Memory (CD-ROM), a Digital versatile disk Read Only Memory (DVD-ROM), or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the disclosure.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally perform the functions and/or methodologies of the embodiments described in this disclosure.
Electronic device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), with one or more devices that enable a user to interact with electronic device 12, and/or with any devices (e.g., network card, modem, etc.) that enable electronic device 12 to communicate with one or more other computing devices. Such communication may be through an input/output (I/O) interface 22. Also, the electronic device 12 may 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 the Network adapter 20. As shown, the network adapter 20 communicates with other modules of the electronic device 12 via the bus 18. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
The processing unit 16 executes various functional applications and data processing, for example, implementing the methods mentioned in the foregoing embodiments, by executing programs stored in the system memory 28.
According to the technical scheme of the embodiment of the disclosure, the grid-connected point frequency value, the target frequency value and the target rotating speed value of the generator in the wind generating set can be obtained firstly, then the rotating speed difference value of the generator is determined according to the rotating speed value and the target rotating speed value of the generator at the current moment, then the corresponding rotating speed increment is determined according to the grid-connected point frequency value and the target frequency value, and then the variable pitch instruction is determined according to the rotating speed difference value and the rotating speed increment of the generator. Therefore, in the process of pitch control, the frequency value of the grid-connected point is fully considered, and the rotating speed difference value is concerned, so that the accuracy of the pitch instruction is improved, the accuracy of the control of the wind generating set is ensured, and conditions are provided for guaranteeing the performance of the wind generating set.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 present disclosure. 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.
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 disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present disclosure in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present disclosure may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that changes, 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 disclosure.

Claims (17)

1. A control method of a wind generating set is characterized by comprising the following steps:
acquiring a grid-connected point frequency value, a target frequency value and a target rotating speed value of a generator in the wind generating set;
determining a rotation speed difference value of the generator according to the rotation speed value of the generator at the current moment and the target rotation speed value;
determining a corresponding rotation speed increment according to the grid-connected point frequency value and the target frequency value;
and determining a variable pitch instruction according to the rotating speed difference value of the generator and the rotating speed increment.
2. The method of claim 1, wherein after said obtaining a grid-connected point frequency value, a target frequency value, further comprises:
determining a frequency difference value between the grid-connected point frequency value and the target frequency value according to the grid-connected point frequency value and the target frequency value;
and determining a target rotating speed value of the generator under the condition that the frequency difference value is larger than the dead zone frequency value.
3. The method of claim 2, wherein determining the target rotational speed value of the generator comprises:
determining the frequency modulation active power according to the grid-connected point frequency value, the dead zone frequency value, the target frequency value, the modulation rate difference and the initial active power value;
determining total frequency modulation active power according to the active power at the current moment and the frequency modulation active power;
and determining a target rotating speed value of the generator according to the total frequency modulation active power.
4. The method of claim 1, wherein determining a corresponding rotational speed increment based on the grid-tie point frequency value and the target frequency value comprises:
determining a target frequency range corresponding to the grid-connected point frequency value according to the relation between the grid-connected point frequency value and a preset frequency range;
determining a corresponding rotation speed increment value according to the target frequency range;
and determining the sign of the rotating speed increment according to the relation between the grid-connected point frequency value and the target frequency value.
5. The method of claim 4, wherein said determining the sign of said speed increment based on the relationship between said grid-tie point frequency value and said target frequency value comprises:
determining that the rotating speed increment sign is negative under the condition that the grid-connected point frequency value is greater than a target frequency value;
and determining that the rotating speed increment sign is positive under the condition that the grid-connected point frequency value is less than or equal to the target frequency value.
6. The method according to any one of claims 1-5, wherein determining a pitch command according to the rotational speed difference of the generator and the rotational speed increment comprises:
inputting the rotating speed difference value of the generator and the rotating speed increment into a preset controller to determine a variable pitch instruction;
and sending the variable pitch instruction to a variable pitch executing mechanism so as to enable the variable pitch executing mechanism to perform variable pitch operation.
7. The method of claim 6, wherein the controller is a Proportional Integral Derivative (PID) controller.
8. A control device of a wind generating set is characterized by comprising:
the acquisition module is used for acquiring a grid-connected point frequency value, a target frequency value and a target rotating speed value of a generator in the wind generating set;
the first determining module is used for determining a rotating speed difference value of the generator according to the rotating speed value of the generator at the current moment and the target rotating speed value;
the second determining module is used for determining corresponding rotating speed increment according to the grid-connected point frequency value and the target frequency value;
and the third determining module is used for determining a variable pitch instruction according to the rotating speed difference value of the generator and the rotating speed increment.
9. The apparatus of claim 8, wherein the first determining module is further configured to:
determining a frequency difference value between the grid-connected point frequency value and the target frequency value according to the grid-connected point frequency value and the target frequency value;
and determining a target rotating speed value of the generator under the condition that the frequency difference value is larger than the dead zone frequency value.
10. The apparatus of claim 9, wherein the first determining module is specifically configured to:
determining the frequency modulation active power according to the grid-connected point frequency value, the dead zone frequency value, the target frequency value, the modulation rate difference and the initial active power value;
determining total frequency modulation active power according to the active power at the current moment and the frequency modulation active power;
and determining a target rotating speed value of the generator according to the total frequency modulation active power.
11. The apparatus of claim 8, wherein the second determining module comprises:
the first determining unit is used for determining a target frequency range corresponding to the grid-connected point frequency value according to the relation between the grid-connected point frequency value and a preset frequency range;
the second determining unit is used for determining a corresponding rotating speed increment value according to the target frequency range;
and the third determining unit is used for determining the symbol of the rotating speed increment according to the relation between the grid-connected point frequency value and the target frequency value.
12. The apparatus of claim 11, wherein the third determining unit is specifically configured to:
determining that the rotating speed increment sign is negative under the condition that the grid-connected point frequency value is greater than a target frequency value;
and determining that the rotating speed increment sign is positive under the condition that the grid-connected point frequency value is less than or equal to the target frequency value.
13. The apparatus of any one of claims 8-12, wherein the third determining module is specifically configured to:
inputting the rotating speed difference value of the generator and the rotating speed increment into a preset controller to determine a variable pitch instruction;
and sending the variable pitch instruction to a variable pitch executing mechanism so as to enable the variable pitch executing mechanism to perform variable pitch operation.
14. The apparatus of claim 13 wherein the controller is a proportional integral derivative PID controller.
15. An electronic device, comprising:
a processor;
a memory for storing executable instructions of the processor;
wherein the processor is configured to invoke and execute the memory-stored executable instructions to implement the method of any one of claims 1-7.
16. A non-transitory computer readable storage medium, instructions in which, when executed by a processor of an electronic device, enable the electronic device to perform the method of any of claims 1-7.
17. A computer program product, characterized in that it comprises a computer program which, when being executed by a processor, carries out the method according to any one of claims 1-7.
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