CN110206681B - Method and device for adaptively adjusting rotating speed of wind generating set - Google Patents

Method and device for adaptively adjusting rotating speed of wind generating set Download PDF

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Publication number
CN110206681B
CN110206681B CN201810169240.2A CN201810169240A CN110206681B CN 110206681 B CN110206681 B CN 110206681B CN 201810169240 A CN201810169240 A CN 201810169240A CN 110206681 B CN110206681 B CN 110206681B
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rotating speed
maximum
wind
speed
minimum
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CN110206681A (en
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方程
王明辉
张鹏飞
周桂林
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • 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
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/0276—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling rotor speed, e.g. variable speed
    • 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
    • F05B2270/10—Purpose of the control system
    • F05B2270/101—Purpose of the control system to control rotational speed (n)
    • 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)
  • Wind Motors (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

The invention provides a method and a device for adaptively adjusting the rotating speed of a wind generating set, wherein the method comprises the following steps: determining wind resources of a mounting machine site of a wind generating set; determining the starting and stopping frequency of the wind generating set, the turbulence intensity value of the installing machine site and the load of the wind generating set according to the determined wind resources; adjusting the minimum operation rotating speed of the wind generating set based on the blade passing frequency of the wind generating set, the first-order natural frequency of a tower of the wind generating set, the starting and stopping frequency and the output power of the wind generating set; and adjusting the maximum operation rotating speed of the wind generating set based on the rated rotating speed limit value of the wind generating set, the turbulence intensity value and the load. By adopting the method and the device for adaptively adjusting the rotating speed of the wind generating set, the generating performance of the wind generating set can be optimized, the running safety of the wind generating set is ensured, and the economical efficiency of the wind generating set is improved.

Description

Method and device for adaptively adjusting rotating speed of wind generating set
Technical Field
The present invention relates generally to the field of wind power technology, and more particularly, to a method and apparatus for adaptively adjusting the rotational speed of a wind turbine generator.
Background
Currently, a wind turbine generator system usually determines an operating speed interval in a design phase, i.e., the wind turbine generator system operates between a minimum operating speed (also called grid-connected speed) and a maximum operating speed (also called rated speed).
However, the external environment of the wind turbine generator system changes during the operation process, and the matching between the operation speed interval of the wind turbine generator system determined in the design stage and the actual wind resource of the installation site of the wind turbine generator system is poor, which reduces the power generation performance of the wind turbine generator system, and needs to be improved.
Disclosure of Invention
The invention aims to provide a method and a device for adaptively adjusting the rotating speed of a wind generating set, which can optimize the power generation performance of the wind generating set, ensure the operation safety of the wind generating set and effectively improve the economy of the wind generating set.
One aspect of the present invention provides a method for adaptively adjusting a rotation speed of a wind turbine generator system, including: determining wind resources of a mounting machine site of the wind generating set; determining the starting and stopping frequency of the wind generating set, the turbulence intensity value of the installing machine site and the load of the wind generating set according to the determined wind resources; adjusting a minimum operating speed of the wind generating set based on a blade passing frequency of the wind generating set, a tower first-order natural frequency of the wind generating set, the start-stop frequency and an output power of the wind generating set; adjusting a maximum operating speed of the wind turbine generator set based on the rated speed limit value, the turbulence intensity value and the load of the wind turbine generator set.
Optionally, the step of determining the wind resource of the mounting machine site of the wind turbine generator system comprises: acquiring wind resource data of a mounting machine site of the wind generating set; and determining wind speed probability density distribution and wind energy parameters of a mounting machine site of the wind generating set by using a wind power plant flow field simulation method and combining the wind resource data, wherein the wind resource data comprises wind speed data, wind direction data and air density data.
Optionally, the step of determining a frequency of start-up and shut-down of the wind turbine generator set, a turbulence intensity value of the mounting machine site and a load of the wind turbine generator set according to the determined wind resource comprises: determining the start-up and shut-down frequency using the wind speed probability density distribution; determining the turbulence intensity value using the wind energy parameter; determining the load using the wind energy parameter and a maximum operating speed of the wind turbine.
Optionally, the step of adjusting the minimum operating rotational speed of the wind turbine generator set comprises: a minimum rotating speed obtaining step: acquiring the current minimum running rotating speed of the wind generating set, and taking the current minimum running rotating speed as a first minimum rotating speed; a first comparison step: acquiring a first blade passing frequency and a first tower first-order natural frequency corresponding to the first minimum rotating speed, and determining whether a first ratio between the first blade passing frequency and the first tower first-order natural frequency is greater than or equal to a first preset threshold value; a second comparison step: when the first ratio is determined to be greater than or equal to the first preset threshold, determining whether a first start-stop frequency of the wind generating set corresponding to the first minimum rotating speed is less than or equal to a preset threshold; a third comparison step: when the first start-up and shut-down frequency is determined to be smaller than or equal to the preset threshold value, determining whether the first output power of the wind generating set corresponding to the first minimum rotating speed is larger than or equal to the self-consumption power of the wind generating set; a first minimum rotation speed updating step: updating the first minimum rotational speed to a difference between the first minimum rotational speed and a minimum operating rotational speed optimization step when it is determined that the first output power is greater than or equal to a self-consumed electrical power of the wind turbine generator set; a frequency acquisition step: acquiring a second blade passing frequency and a second tower first-order natural frequency corresponding to the first minimum rotating speed; a first minimum rotation speed determination step: determining a sum of the first minimum rotation speed and a minimum operation rotation speed optimization step size as a minimum operation rotation speed of the wind turbine generator set when it is determined that a second ratio between the second blade passing frequency and the second tower first-order natural frequency is smaller than the first preset threshold value, or when it is determined that a second start-stop frequency of the wind turbine generator set corresponding to the first minimum rotation speed is larger than the preset threshold value, or when it is determined that a second output power of the wind turbine generator set corresponding to the first minimum rotation speed is smaller than a self-consumption power of the wind turbine generator set.
Optionally, the step of adjusting the minimum operating rotational speed of the wind turbine generator set further comprises: a second minimum rotating speed updating step: when it is determined that the second ratio is greater than or equal to the first preset threshold, and when it is determined that the second startup and shutdown frequency is less than or equal to the predetermined threshold, and when it is determined that the second output power is greater than or equal to the self-consumed power of the wind turbine generator set, updating the first minimum rotation speed to a difference between the first minimum rotation speed and a minimum operation rotation speed optimization step, and returning to the frequency obtaining step. Optionally, the step of adjusting the minimum operating rotational speed of the wind turbine generator set further comprises: a third minimum rotating speed updating step: when the first ratio is determined to be smaller than the first preset threshold, or when the first start-stop frequency is determined to be larger than the preset threshold, or when the first output power is determined to be smaller than the self-consumption power of the wind generating set, updating the first minimum rotating speed to be the sum of the first minimum rotating speed and a minimum operation rotating speed optimization step length, and returning to the first comparison step.
Optionally, the step of adjusting the maximum operating speed of the wind turbine generator set comprises: and (3) comparing the turbulence intensity: determining whether the turbulence intensity value is less than or equal to a preset turbulence intensity value; a first maximum rotation speed obtaining step: when the turbulence intensity value is determined to be smaller than or equal to a preset turbulence intensity value, acquiring the current maximum operation rotating speed of the wind generating set, and taking the current maximum operation rotating speed as a first maximum rotating speed; a first maximum rotation speed updating step: updating the first maximum rotation speed to be the sum of the first maximum rotation speed and the maximum operation rotation speed optimization step length; a first determination step: determining whether the load of the wind generating set corresponding to the first maximum rotating speed is greater than or equal to a preset load of the wind generating set; a second determination step: when it is determined that the load is less than the preset load, determining whether the first maximum rotational speed is less than or equal to a rated rotational speed limit value of the wind turbine generator set; a maximum rotating speed determining step: determining the first maximum rotational speed as a maximum operating rotational speed of the wind turbine generator set when it is determined that the first maximum rotational speed is less than or equal to the rated rotational speed limit.
Optionally, the step of adjusting the maximum operating speed of the wind turbine generator system further comprises: a first step length updating step: when the load is determined to be larger than or equal to the preset load or when the first maximum rotating speed is determined to be larger than the rated rotating speed limit value, the maximum operating rotating speed optimization step length is updated to be one half of the maximum operating rotating speed optimization step length, the current maximum operating rotating speed of the wind generating set is obtained, the current maximum operating rotating speed is used as the first maximum rotating speed, and the step of updating the first maximum rotating speed is returned.
Optionally, the step of adjusting the maximum operating speed of the wind turbine generator system further comprises: a second maximum rotation speed obtaining step: when the turbulence intensity value is determined to be larger than a preset turbulence intensity value, acquiring the current maximum operation rotating speed of the wind generating set, and taking the current maximum operation rotating speed as a first maximum rotating speed; a second maximum rotating speed updating step: updating the first maximum rotating speed to be the difference between the first maximum rotating speed and the maximum operation rotating speed optimization step length; a third determination step: determining whether the load of the wind generating set corresponding to the first maximum rotating speed is greater than or equal to a preset load of the wind generating set; a third maximum rotation speed obtaining step: and when the load is determined to be smaller than the preset load, acquiring the current maximum operation rotating speed of the wind generating set, taking the current maximum operation rotating speed as the first maximum rotating speed, and returning to the first maximum rotating speed updating step.
Optionally, the step of adjusting the maximum operating speed of the wind turbine generator system further comprises: a second step of long updating: and when the load is determined to be greater than or equal to the preset load, updating the maximum operation rotating speed optimization step length to be twice of the maximum operation rotating speed optimization step length, acquiring the current maximum operation rotating speed of the wind generating set, taking the current maximum operation rotating speed as the first maximum rotating speed, and returning to the second maximum rotating speed updating step.
Another aspect of the present invention further provides an apparatus for adaptively adjusting a rotation speed of a wind turbine generator system, including: the wind resource determining module is used for determining the wind resource of the mounting machine site of the wind generating set; the parameter determination module is used for determining the starting and stopping frequency of the wind generating set, the turbulence intensity value of the mounting machine site and the load of the wind generating set according to the determined wind resources; the minimum rotating speed adjusting module is used for adjusting the minimum operating rotating speed of the wind generating set based on the blade passing frequency of the wind generating set, the tower first-order natural frequency of the wind generating set, the starting and stopping frequency and the output power of the wind generating set; and the maximum rotating speed adjusting module is used for adjusting the maximum operating rotating speed of the wind generating set based on the rated rotating speed limit value, the turbulence intensity value and the load of the wind generating set.
Optionally, the wind resource determining module obtains wind resource data of a mounting machine site of the wind generating set, and determines wind speed probability density distribution and wind energy parameters of the mounting machine site of the wind generating set by combining the wind resource data by using a wind power plant flow field simulation method, wherein the wind resource data includes wind speed data, wind direction data and air density data.
Optionally, the parameter determination module determines the start-stop frequency using the wind speed probability density distribution, determines the turbulence intensity value using the wind energy parameter, and determines the load using the wind energy parameter and a maximum operating speed of the wind turbine.
Optionally, the minimum rotation speed adjustment module comprises: minimum rotational speed acquisition unit: acquiring the current minimum running rotating speed of the wind generating set, and taking the current minimum running rotating speed as a first minimum rotating speed; a first comparison unit: acquiring a first blade passing frequency and a first tower first-order natural frequency corresponding to the first minimum rotating speed, and determining whether a first ratio between the first blade passing frequency and the first tower first-order natural frequency is greater than or equal to a first preset threshold value; a second comparing unit: when the first ratio is determined to be greater than or equal to the first preset threshold, determining whether a first start-stop frequency of the wind generating set corresponding to the first minimum rotating speed is less than or equal to a preset threshold; a third comparing unit: when the first start-up and shut-down frequency is determined to be smaller than or equal to the preset threshold value, determining whether the first output power of the wind generating set corresponding to the first minimum rotating speed is larger than or equal to the self-consumption power of the wind generating set; a first minimum rotation speed updating unit: updating the first minimum rotational speed to a difference between the first minimum rotational speed and a minimum operating rotational speed optimization step when it is determined that the first output power is greater than or equal to a self-consumed electrical power of the wind turbine generator set; a frequency acquisition unit: acquiring a second blade passing frequency and a second tower first-order natural frequency corresponding to the first minimum rotating speed; a first minimum rotation speed determination unit: determining a sum of the first minimum rotation speed and a minimum operation rotation speed optimization step size as a minimum operation rotation speed of the wind turbine generator set when it is determined that a second ratio between the second blade passing frequency and the second tower first-order natural frequency is smaller than the first preset threshold value, or when it is determined that a second start-stop frequency of the wind turbine generator set corresponding to the first minimum rotation speed is larger than the preset threshold value, or when it is determined that a second output power of the wind turbine generator set corresponding to the first minimum rotation speed is smaller than a self-consumption power of the wind turbine generator set.
Optionally, the minimum rotation speed adjusting module further comprises: a second minimum rotation speed updating unit: when it is determined that the second ratio is greater than or equal to the first preset threshold, and when it is determined that the second startup and shutdown frequency is less than or equal to the predetermined threshold, and when it is determined that the second output power is greater than or equal to the self-consumed power of the wind turbine generator set, updating the first minimum rotation speed to a difference between the first minimum rotation speed and a minimum operation rotation speed optimization step size, and providing the updated first minimum rotation speed to the frequency acquisition unit.
Optionally, the minimum rotation speed adjusting module further comprises: a third minimum rotation speed updating unit: when the first ratio is determined to be smaller than the first preset threshold, or when the first start-stop frequency is determined to be larger than the preset threshold, or when the first output power is determined to be smaller than the self-consumption power of the wind generating set, the first minimum rotating speed is updated to be the sum of the first minimum rotating speed and a minimum operation rotating speed optimization step length, and the updated first minimum rotating speed is provided to a first comparison unit.
Optionally, the maximum rotation speed adjustment module comprises: turbulence intensity comparison unit: determining whether the turbulence intensity value is less than or equal to a preset turbulence intensity value; a first maximum rotation speed acquisition unit: when the turbulence intensity value is determined to be smaller than or equal to a preset turbulence intensity value, acquiring the current maximum operation rotating speed of the wind generating set, and taking the current maximum operation rotating speed as a first maximum rotating speed; a first maximum rotation speed updating unit: updating the first maximum rotation speed to be the sum of the first maximum rotation speed and the maximum operation rotation speed optimization step length; a first determination unit: determining whether the load of the wind generating set corresponding to the first maximum rotating speed is greater than or equal to a preset load of the wind generating set; a second determination unit: when it is determined that the load is less than the preset load, determining whether the first maximum rotational speed is less than or equal to a rated rotational speed limit value of the wind turbine generator set; maximum rotation speed determination unit: determining the first maximum rotational speed as a maximum operating rotational speed of the wind turbine generator set when it is determined that the first maximum rotational speed is less than or equal to the rated rotational speed limit.
Optionally, the maximum rotation speed adjusting module further comprises: a first step size updating unit: when the load is determined to be larger than or equal to the preset load or when the first maximum rotating speed is determined to be larger than the rated rotating speed limit value, the maximum operating rotating speed optimization step length is updated to be one half of the maximum operating rotating speed optimization step length, the current maximum operating rotating speed of the wind generating set is obtained, the current maximum operating rotating speed is used as the first maximum rotating speed, and the first maximum rotating speed is provided to a first maximum rotating speed updating unit.
Optionally, the maximum rotation speed adjusting module further comprises: a second maximum rotation speed acquisition unit: when the turbulence intensity value is determined to be larger than a preset turbulence intensity value, acquiring the current maximum operation rotating speed of the wind generating set, and taking the current maximum operation rotating speed as a first maximum rotating speed; a second maximum rotation speed updating unit: updating the first maximum rotating speed to be the difference between the first maximum rotating speed and the maximum operation rotating speed optimization step length; a third determination unit: determining whether the load of the wind generating set corresponding to the first maximum rotating speed is greater than or equal to a preset load of the wind generating set; a third maximum rotation speed acquisition unit: and when the load is determined to be smaller than the preset load, acquiring the current maximum operation rotating speed of the wind generating set, taking the current maximum operation rotating speed as the first maximum rotating speed, and providing the first maximum rotating speed for a first maximum rotating speed updating unit.
Optionally, the maximum rotation speed adjusting module further comprises: a second step length updating unit: when the load is determined to be larger than or equal to the preset load, updating the maximum operation rotating speed optimization step length to be twice of the maximum operation rotating speed optimization step length, obtaining the current maximum operation rotating speed of the wind generating set, taking the current maximum operation rotating speed as the first maximum rotating speed, and providing the first maximum rotating speed for a second maximum rotating speed updating unit.
Another aspect of the invention also provides a computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the method of adaptively adjusting the rotational speed of a wind park as described above.
Another aspect of the present invention also provides a computing apparatus, comprising: a processor; a memory for storing a computer program which, when executed by the processor, causes the processor to perform the method of adaptively adjusting the rotational speed of a wind park as described above.
The method and the device for adaptively adjusting the rotating speed of the wind generating set adaptively adjust the minimum operating rotating speed according to the wind resource of the mounting machine site of the wind generating set and by considering three factors of the resonance interval, the self-consumption power and the starting and stopping frequency of the wind generating set, and adaptively adjust the maximum operating rotating speed by combining the turbulence intensity value of the mounting machine site of the wind generating set and the load of the wind generating set, thereby optimizing the generating performance of the wind generating set, ensuring the operating safety of the wind generating set and effectively improving the economy of the wind generating set.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:
FIG. 1 shows a flow chart of a method of adaptively adjusting a rotational speed of a wind park according to an embodiment of the invention;
FIG. 2 shows an example of a Campbell diagram of a wind park according to an embodiment of the invention;
FIG. 3 shows a flow chart of the steps of adjusting the minimum operating rotational speed of a wind park according to an embodiment of the invention;
FIG. 4 shows a flow chart of the steps of adjusting the maximum operating rotational speed of a wind park according to an embodiment of the invention;
FIG. 5 shows a block diagram of an apparatus for adaptively adjusting the rotational speed of a wind park according to an embodiment of the invention;
FIG. 6 illustrates a detailed block diagram of a minimum speed adjustment module according to an embodiment of the present invention;
FIG. 7 illustrates a detailed block diagram of the maximum speed adjustment module according to an embodiment of the present invention.
Detailed Description
Various example embodiments will now be described more fully with reference to the accompanying drawings, in which some example embodiments are shown.
A method and apparatus for adaptively adjusting a rotational speed of a wind turbine generator set according to an embodiment of the present invention will be described with reference to fig. 1 to 7.
Fig. 1 shows a flow chart of a method of adaptively adjusting a rotational speed of a wind park according to an embodiment of the invention, and fig. 2 shows an example of a Campbell (Campbell) diagram of a wind park according to an embodiment of the invention.
In step S10, the wind resource of the installation site of the wind turbine generator set is determined.
In one embodiment of step S10, acquiring wind resource data of an installation site of the wind turbine generator system; and determining the wind speed probability density distribution and the wind energy parameters of the mounting machine site of the wind generating set by using a wind power plant flow field simulation method and combining the obtained wind resource data.
Here, the wind resource data includes wind speed data, wind direction data, air density data, and the like.
The actual wind resource data of different mounting machine sites of the wind generating set can be different, and the actual wind resource data of the same mounting machine site of the wind generating set at different moments are also different. As an example, wind resource data of the installation site of the wind turbine generator system may be measured by a wind resource measurement system.
It should be understood that various suitable wind farm flow field simulation methods may be used to determine wind speed probability density distributions and wind energy parameters for the mounting machine site of the wind turbine generator set, and the invention is not limited thereto.
In step S20, the start-stop frequency of the wind turbine generator set, the turbulence intensity value of the mounting machine site and the load of the wind turbine generator set are determined according to the determined wind resources.
Preferably, in step S20, the wind speed probability density distribution is used to determine the start-stop frequency of the wind turbine generator set; determining the turbulence intensity value of the mounting machine site by using the wind energy parameters; the load of the wind generating set is determined using the wind energy parameters and the maximum operating speed of the wind generating set.
Here, the value of the turbulence intensity of the mounting machine site is a representative value of the turbulence intensity of the mounting machine site, indicating the magnitude of the turbulence intensity of the mounting machine site.
Further, the frequency of start-stops determined using different wind speed probability density distributions may be different, and the turbulence intensity value for the mounting machine site determined using different wind energy parameters may be different.
In step S30, the minimum operating speed of the wind turbine generator set is adjusted based on the blade passing frequency of the wind turbine generator set, the tower first-order natural frequency of the wind turbine generator set, the determined start-stop frequency, and the output power of the wind turbine generator set.
In the process of adjusting the minimum operation rotating speed of the wind generating set, three factors of the resonance region of the wind generating set, the output power of the wind generating set and the starting and stopping frequency are comprehensively considered for adjustment.
Specifically, avoiding the resonance zone of the wind turbine generator set generally means that the first-order natural frequency of the tower corresponding to the rotation speed avoids the blade passing frequency and the impeller rotation frequency (i.e., the impeller 1P frequency) corresponding to the rotation speed. With reference to FIG. 2, the tower first order frequency f2The two ends of the line respectively correspond to the minimum operating rotating speed and the maximum operating rotating speed of the wind generating set, and as can be seen from fig. 2, the smaller the minimum operating rotating speed of the wind generating set is, the first-order frequency f of the tower frame is2The closer this line is to the blade passing frequency f of the wind turbine1This may risk resonance of the wind turbine. Therefore, the embodiment of the invention takes the wind generating set avoiding the resonance region as one of the conditions for adjusting the minimum operation rotating speed.
Embodiments of the present invention achieve avoidance of the resonant region of the wind turbine generator set by considering the blade pass frequency (i.e., the impeller 3P frequency) of the wind turbine generator set corresponding to the minimum operating speed and the tower first order natural frequency of the wind turbine generator set corresponding to the minimum operating speed.
The minimum operation rotating speed of the wind generating set influences the start-stop frequency of the wind generating set, generally, when the wind speed is low, turbulence is large, the wind speed changes frequently, and if the minimum operation rotating speed of the wind generating set is low, the wind generating set is easily switched frequently between start-stop and stop, and adverse effects are caused to the wind generating set. Therefore, the embodiment of the invention takes the start-stop frequency of the wind generating set as one of the conditions for adjusting the minimum operation rotating speed.
The wind field self-power consumption phenomenon mainly refers to the wind generating set self-power consumption phenomenon of a wind field in the grid-connected power generation process, and the active power of a grid side is changed from a positive value to a negative value under the working condition of low wind. The main reason of the wind farm self-power consumption phenomenon is that the output power of the wind generating set (i.e. the generator output power of the wind generating set) is not enough to support the self-power consumption of the high-power electric equipment (such as electrical elements, cooling systems, etc.) of the wind generating set during the operation process of the wind generating set, and the power grid needs to provide extra electric energy, so that the self-power consumption of the wind farm is increased, and extra power generation loss is brought to the operation of the wind farm. Therefore, the embodiment of the invention takes the output power of the wind generating set as one of the conditions for adjusting the minimum operation rotating speed.
Returning to fig. 1, at step S40, the maximum operating speed of the wind park is adjusted based on the rated speed limit of the wind park, the determined turbulence intensity value and the determined load.
In the process of adjusting the maximum operation rotating speed of the wind generating set, two factors of the operation safety of the wind generating set and the generator maximum capacity of the wind generating set are comprehensively considered for adjustment. Here, the rated rotational speed limit value of the wind turbine generator system may be a preset value.
The step of adjusting the minimum operating speed of the wind turbine generator set according to the embodiment of the present invention is described in detail below with reference to fig. 3.
Fig. 3 shows a flow chart of the steps of adjusting the minimum operating rotational speed of a wind park according to an embodiment of the invention.
In step S301, that is, the minimum rotation speed acquisition step: and acquiring the current minimum operating rotating speed of the wind generating set, and taking the current minimum operating rotating speed as a first minimum rotating speed.
Here, the current minimum operating speed of the wind turbine generator system may be a preset minimum operating speed of the wind turbine generator system, or may be an optimized minimum operating speed obtained after the last minimum operating speed is adaptively adjusted.
In step S302, a first blade passing frequency and a first tower first order natural frequency corresponding to a first minimum rotational speed are obtained.
In step S303, it is determined whether a first ratio between the first blade passing frequency and the first tower first order natural frequency is greater than or equal to a first preset threshold.
It should be understood that the first comparison step (steps S302 and S303) is used to keep the wind turbine generator away from the resonance zone. Preferably, the first preset threshold is 1.15.
Specifically, avoiding the resonance region of the wind turbine requires the blade passing frequency f corresponding to the minimum operating speed10And a tower first order frequency f corresponding to the minimum operating speed12Satisfies the following formula:
f10/f12≥1.15，
that is, when it is determined that the first ratio is greater than or equal to 1.15, the wind turbine generator system may ensure a certain safety margin, thereby effectively avoiding the resonance region.
In step S304, i.e., the second comparison step: when the first ratio is determined to be larger than or equal to a first preset threshold value, whether the first starting and stopping frequency of the wind generating set corresponding to the first minimum rotating speed is smaller than or equal to a preset threshold value or not is determined.
Here, the predetermined threshold may be preset as needed, and the present invention is not limited thereto.
In step S305, i.e., the third comparison step: when it is determined that the first start-up and shut-down frequency is less than or equal to the predetermined threshold, it is determined whether the first output power of the wind park corresponding to the first minimum rotation speed is greater than or equal to the self-consumption power of the wind park.
In step S306, i.e., the first minimum rotation speed updating step: when the first output power is determined to be larger than or equal to the self-consumption power of the wind generating set, the first minimum rotating speed is updated to be the difference between the first minimum rotating speed and the minimum operation rotating speed optimization step length.
Here, the minimum operation speed optimization step size may be preset as needed, and the present invention is not limited thereto.
As an example, assume that the first minimum rotation speed in step S301 is denoted as R1The minimum running speed optimization step is recorded as △minAnd the first minimum rotating speed obtained by updating in the step S306 is recorded as R2Then R is2Is obtained by the following formula:
R2＝R1-Δmin。
in step S307 (i.e., frequency acquisition step), the second blade passing frequency and the second tower first-order natural frequency corresponding to the first minimum rotation speed are acquired.
Here, the second blade passing frequency is the blade passing frequency corresponding to the first minimum rotational speed updated in step 306, and the second first-tower natural frequency is the first-tower natural frequency corresponding to the first minimum rotational speed updated in step 306.
In step S308, i.e., the first minimum rotation speed determining step: and when a second ratio between the second blade passing frequency and the second tower first-order natural frequency is determined to be smaller than a first preset threshold value, or when a second start-stop frequency of the wind generating set corresponding to the first minimum rotating speed is determined to be larger than a preset threshold value, or when a second output power of the wind generating set corresponding to the first minimum rotating speed is determined to be smaller than the self-consumption power of the wind generating set, determining the sum of the first minimum rotating speed and the minimum operation rotating speed optimization step size as the minimum operation rotating speed of the wind generating set.
As an example, assume that the minimum operating speed of the wind turbine generator set determined in step S308 is recorded as RminThen R isminIs obtained by the following formula:
Rmin＝R2+Δmin。
further, when it is determined that the second ratio is greater than or equal to the first preset threshold value, and when it is determined that the start-stop frequency is less than or equal to the predetermined threshold value, and when it is determined that the second output power is greater than or equal to the self-consumed power of the wind turbine generator set, at step S309 (i.e., second minimum rotation speed updating step), the first minimum rotation speed is updated to the difference between the first minimum rotation speed and the minimum operation rotation speed optimization step, and the process returns to step 307.
Here, in step S307 executed back, the blade passing frequency and the tower first-order natural frequency corresponding to the first minimum rotation speed updated in step S309 are acquired.
Further, when it is determined in step S303 that the first ratio is smaller than the first preset threshold, or when it is determined in step S304 that the first start-up/shut-down frequency is larger than the predetermined threshold, or when it is determined in step S305 that the first output power is smaller than the self-consumption power of the wind turbine generator set, in step S310 (i.e., the third minimum rotation speed updating step), the first minimum rotation speed is updated to the sum of the first minimum rotation speed and the minimum operation rotation speed optimization step, and the process returns to perform step S302.
Here, the first minimum rotational speed updated in step S310 is the first minimum rotational speed R in step S3011And the sum of the minimum operating speed optimization step size.
For example, assume that the first minimum rotation speed updated in step S310 is denoted as R3Then R is3Is obtained by the following formula:
R3＝R1+Δmin。
in this case, the step S302 is returned to, and the first minimum rotation speed R obtained by the step S is obtained and updated3The corresponding first blade pass frequency and the first tower first order natural frequency.
The step of adjusting the maximum operating speed of the wind turbine generator system according to the embodiment of the present invention is described in detail below with reference to fig. 4.
Fig. 4 shows a flow chart of the steps of adjusting the maximum operating rotational speed of a wind park according to an embodiment of the invention.
In step S401, i.e., the turbulence intensity comparing step: determining whether the turbulence intensity value is less than or equal to a preset turbulence intensity value.
Preferably, it is determined whether the turbulence intensity value at a predetermined wind speed is less than or equal to a preset value of turbulence intensity at the predetermined wind speed.
When it is determined in step S401 that the turbulence intensity value is less than or equal to the preset turbulence intensity value, in step S402, that is, the first maximum rotation speed obtaining step: and acquiring the current maximum operation rotating speed of the wind generating set, and taking the current maximum operation rotating speed as a first maximum rotating speed.
Here, the current maximum operating speed of the wind turbine generator system may be a preset maximum operating speed of the wind turbine generator system, or may be an optimized maximum operating speed obtained after the last maximum operating speed is adaptively adjusted.
In step S403, i.e., the first maximum rotation speed updating step: and updating the first maximum rotating speed to be the sum of the first maximum rotating speed and the maximum operation rotating speed optimization step length.
Here, the maximum operation speed optimization step size may be preset as needed, and the present invention is not limited thereto.
As an example, assume that the first maximum rotation speed obtained in step S402 is denoted as R10And the first maximum rotating speed obtained by updating in the step S403 is recorded as R20The maximum operation speed optimization step is recorded as △maxThen R is20Is obtained by the following formula:
R20＝R10+Δmax。
in step S404, i.e., the first determination step: and determining whether the load of the wind generating set corresponding to the first maximum rotating speed is greater than or equal to the preset load of the wind generating set.
Specifically, the first maximum rotation speed R updated in step S403 is determined20Whether the load of the corresponding wind generating set is larger than or equal to the preset load of the wind generating set or not.
When it is determined at step S404 that the load is smaller than the preset load, at step S405, that is, a second determination step: it is determined whether the first maximum rotational speed is less than or equal to a rated rotational speed limit value of the wind park.
When it is determined in step S405 that the first maximum rotation speed is less than or equal to the rated rotation speed limit value, in step S406, that is, the maximum rotation speed determining step: and determining the first maximum rotating speed as the maximum operating rotating speed of the wind generating set.
Here, the safety of the operation of the wind turbine generator system is ensured by determining that the first maximum rotational speed is less than or equal to the rated rotational speed limit value.
Further, when it is determined at step S404 that the load is greater than or equal to the preset load, or when it is determined at step S405 that the first maximum rotation speed is greater than the rated rotation speed limit value, at step S407, that is, the first step size updating step: and updating the maximum operation rotating speed optimization step length to be one half of the maximum operation rotating speed optimization step length, obtaining the current maximum operation rotating speed of the wind generating set, taking the current maximum operation rotating speed as the first maximum rotating speed, and returning to the step S403.
As an example, assume that the first maximum rotation speed updated in step S403 is returned to and recorded as R30，
Figure BDA0001585339720000121
Then R is30Is obtained by the following formula:
further, when it is determined in step S401 that the turbulence intensity value is greater than the preset turbulence intensity value, in step 408, that is, the second maximum rotation speed acquisition step: and acquiring the current maximum operation rotating speed of the wind generating set, and taking the current maximum operation rotating speed as a first maximum rotating speed.
In step 409, i.e., the second maximum rotation speed updating step: and updating the first maximum rotating speed as the difference between the first maximum rotating speed and the maximum operation rotating speed optimization step length.
As an example, assume that the first maximum rotational speed obtained in step S408 is denoted as R10And the first maximum rotating speed obtained by updating in the step S409 is recorded as R30The maximum operation speed optimization step is recorded as △maxThen R is30Is obtained by the following formula:
R30＝R10-Δmax。
at step 410, i.e., the third determination step: and determining whether the load of the wind generating set corresponding to the first maximum rotating speed is greater than or equal to the preset load of the wind generating set.
Specifically, the first maximum rotation speed R updated in step S410 is determined30Whether the load of the corresponding wind generating set is larger than or equal to the preset load of the wind generating set or not.
When it is determined in step 410 that the load is smaller than the preset load, in step 411, that is, the third maximum rotation speed obtaining step: and acquiring the current maximum operation rotating speed of the wind generating set, taking the current maximum operation rotating speed as the first maximum rotating speed, and returning to the step S403.
Here, as an example, it is assumed that step S403 is performed againThe newly obtained first maximum rotational speed is recorded as R40Then R is40Is obtained by the following formula:
R40＝R30+Δmax。
further, when it is determined in step 410 that the load is greater than or equal to the preset load, in step S412, i.e., the second step size updating step: and updating the maximum operation rotating speed optimization step length to be twice of the maximum operation rotating speed optimization step length, acquiring the current maximum operation rotating speed of the wind generating set, taking the current maximum operation rotating speed as the first maximum rotating speed, and returning to the step 409.
As an example, assume that the first maximum rotational speed updated in the return step 409 is R50Then R50 is given by:
R50＝R10-2Δmax。
it should be appreciated that adjusting the maximum operating speed of the wind turbine directly affects the power curve of the wind turbine and thus the power production of the wind turbine. The embodiment of the invention adaptively adjusts the maximum operation rotating speed of the wind generating set, can optimize the power generation performance of the wind generating set and effectively improves the economy of the wind generating set.
The device for adaptively adjusting the rotation speed of the wind turbine generator set according to the embodiment of the present invention is described in detail below with reference to fig. 5.
Fig. 5 shows a block diagram of an apparatus for adaptively adjusting the rotational speed of a wind park according to an embodiment of the invention.
Referring to fig. 5, an apparatus for adaptively adjusting a rotational speed of a wind turbine generator according to an embodiment of the present invention includes: a wind resource determination module 100, a parameter determination module 200, a minimum rotational speed adjustment module 300, and a maximum rotational speed adjustment module 400.
The wind resource determination module 100 determines wind resources of an installation site of the wind turbine generator system.
In an embodiment of the wind resource determining module 100, the wind resource determining module 100 obtains wind resource data of a mounting machine site of the wind generating set, and determines wind speed probability density distribution and wind energy parameters of the mounting machine site of the wind generating set by using a wind farm flow field simulation method and combining the obtained wind resource data.
Here, the wind resource data includes wind speed data, wind direction data, air density data, and the like.
The parameter determination module 200 determines the start-stop frequency of the wind generating set, the turbulence intensity value of the mounting machine site and the load of the wind generating set according to the determined wind resource.
Preferably, the parameter determination module 200 determines the start-stop frequency of the wind turbine generator system using the wind speed probability density distribution, determines the turbulence intensity value of the mounting machine site using the wind energy parameter, and determines the load of the wind turbine generator system using the wind energy parameter and the maximum operating speed of the wind turbine generator system.
The minimum rotation speed adjustment module 300 adjusts the minimum operating rotation speed of the wind turbine generator system based on the blade pass frequency of the wind turbine generator system, the tower first-order natural frequency of the wind turbine generator system, the start-stop frequency, and the output power of the wind turbine generator system.
The maximum speed adjustment module 400 adjusts the maximum operating speed of the wind turbine generator based on the rated speed limit of the wind turbine generator, the turbulence intensity value, and the load.
The process of adjusting the minimum operating speed of the wind turbine generator system by the minimum speed adjustment module according to the embodiment of the present invention is described in detail below with reference to fig. 6.
FIG. 6 illustrates a detailed block diagram of a minimum speed adjustment module according to an embodiment of the present invention.
Referring to fig. 6, the minimum rotation speed adjustment module 300 includes a minimum rotation speed acquisition unit 301, a first comparison unit 302, a second comparison unit 303, a third comparison unit 304, a first minimum rotation speed update unit 305, a frequency acquisition unit 306, and a first minimum rotation speed determination unit 307.
The minimum rotation speed obtaining unit 301 obtains a current minimum operation rotation speed of the wind turbine generator system, and takes the current minimum operation rotation speed as a first minimum rotation speed.
The first comparing unit 302 acquires the first blade passing frequency and the first tower first-order natural frequency corresponding to the first minimum rotational speed, and determines whether a first ratio between the first blade passing frequency and the first tower first-order natural frequency is greater than or equal to a first preset threshold.
When determining that the first ratio is greater than or equal to a first preset threshold, the second comparing unit 303 determines whether the first start-stop frequency of the wind turbine generator set corresponding to the first minimum rotation speed is less than or equal to a predetermined threshold.
When it is determined that the first start-up and shut-down frequency is less than or equal to the predetermined threshold, the third comparing unit 304 determines whether the first output power of the wind park corresponding to the first minimum rotation speed is greater than or equal to the self-consumption power of the wind park.
When it is determined that the first output power is greater than or equal to the self-consumed power of the wind turbine generator set, the first minimum rotation speed updating unit 305 updates the first minimum rotation speed to a difference between the first minimum rotation speed and the minimum operation rotation speed optimization step.
The frequency obtaining unit 306 obtains a second blade passing frequency and a second tower first-order natural frequency corresponding to the first minimum rotational speed.
When it is determined that the second ratio between the second blade passing frequency and the second tower first-order natural frequency is smaller than a first preset threshold, or when it is determined that the second start-stop frequency of the wind turbine generator set corresponding to the first minimum rotation speed is larger than a predetermined threshold, or when it is determined that the second output power of the wind turbine generator set corresponding to the first minimum rotation speed is smaller than the self-consumption power of the wind turbine generator set, the first minimum rotation speed determination unit 307 determines the sum of the first minimum rotation speed and the minimum operation rotation speed optimization step size as the minimum operation rotation speed of the wind turbine generator set.
In addition, the minimum rotation speed adjustment module 300 further includes: a second minimum rotation speed updating unit (not shown).
When it is determined that the second ratio is greater than or equal to a first preset threshold, and when it is determined that the second startup and shutdown frequency is less than or equal to a predetermined threshold, and when it is determined that the second output power is greater than or equal to the self-consumed power of the wind turbine generator set, the second minimum rotation speed updating unit updates the first minimum rotation speed to a difference between the first minimum rotation speed and the minimum operation rotation speed optimization step size, and supplies the updated first minimum rotation speed to the frequency obtaining unit 306.
In addition, the minimum rotation speed adjustment module 300 further includes: a third minimum rotation speed updating unit (not shown).
When it is determined that the first ratio is smaller than a first preset threshold, or when it is determined that the first startup and shutdown frequency is greater than a predetermined threshold, or when it is determined that the first output power is smaller than the self-consumption power of the wind turbine generator set, the third minimum rotation speed updating unit updates the first minimum rotation speed to the sum of the first minimum rotation speed and the minimum operation rotation speed optimization step size, and after the third minimum rotation speed updating unit executes, provides the updated first minimum rotation speed to the first comparing unit 301.
The process of adjusting the maximum operating speed of the wind turbine generator system by the maximum speed adjustment module according to the embodiment of the present invention is described in detail below with reference to fig. 7.
FIG. 7 illustrates a detailed block diagram of the maximum speed adjustment module according to an embodiment of the present invention.
Referring to fig. 7, the maximum rotation speed adjustment module 400 includes a turbulence intensity comparison unit 401, a first maximum rotation speed acquisition unit 402, a first maximum rotation speed update unit 403, a first determination unit 404, a second determination unit 405, and a maximum rotation speed determination unit 406.
The turbulence intensity comparison unit 401 determines whether the turbulence intensity value is less than or equal to a preset turbulence intensity value.
When it is determined that the turbulence intensity value is smaller than or equal to the preset turbulence intensity value, the first maximum rotation speed obtaining unit 402 obtains the current maximum operation rotation speed of the wind turbine generator system, and takes the current maximum operation rotation speed as the first maximum rotation speed.
The first maximum rotation speed updating unit 403 updates the first maximum rotation speed to the sum of the first maximum rotation speed and the maximum operation rotation speed optimization step.
The first determination unit 404 determines whether the load of the wind turbine generator set corresponding to the first maximum rotation speed is greater than or equal to a preset load of the wind turbine generator set.
When it is determined that the load is less than the preset load, the second determination unit 405 determines whether the first maximum rotational speed is less than or equal to a rated rotational speed limit value of the wind turbine generator set.
When it is determined that the first maximum rotational speed is less than or equal to the rated rotational speed limit value, the maximum rotational speed determination unit 406 determines the first maximum rotational speed as the maximum operating rotational speed of the wind turbine generator set.
In addition, the maximum rotation speed adjustment module 400 further includes a first step size update unit (not shown).
When it is determined that the load is greater than or equal to the preset load or when it is determined that the first maximum rotation speed is greater than the rated rotation speed limit value, the first step length updating unit updates the maximum operation rotation speed optimization step length to one-half of the maximum operation rotation speed optimization step length, obtains the current maximum operation rotation speed of the wind turbine generator system, and provides the first maximum rotation speed to the first maximum rotation speed updating unit 403.
In addition, the maximum rotation speed adjustment module 400 further includes a second maximum rotation speed obtaining unit (not shown), a second maximum rotation speed updating unit (not shown), a third determining unit (not shown), and a third maximum rotation speed obtaining unit (not shown).
When the turbulence intensity value is determined to be larger than the preset turbulence intensity value, the second maximum rotating speed obtaining unit obtains the current maximum operating rotating speed of the wind generating set, and the current maximum operating rotating speed is used as the first maximum rotating speed.
The second maximum rotation speed updating unit updates the first maximum rotation speed to be the difference between the first maximum rotation speed and the maximum operation rotation speed optimization step length.
The third determining unit determines whether the load of the wind generating set corresponding to the first maximum rotating speed (namely, the first maximum rotating speed updated by the second maximum rotating speed updating unit) is greater than or equal to the preset load of the wind generating set;
when it is determined that the load is smaller than the preset load, the third maximum rotation speed obtaining unit obtains a current maximum operation rotation speed of the wind turbine generator system, takes the current maximum operation rotation speed as a first maximum rotation speed, and provides the first maximum rotation speed to the first maximum rotation speed updating unit 403.
In addition, the maximum rotation speed adjustment module 400 further includes a second step size update unit (not shown).
When the load is determined to be larger than or equal to the preset load, the second step length updating unit updates the maximum operation rotating speed optimization step length to be twice of the maximum operation rotating speed optimization step length, obtains the current maximum operation rotating speed of the wind generating set, takes the current maximum operation rotating speed as the first maximum rotating speed, and provides the first maximum rotating speed for the second maximum rotating speed updating unit.
In addition, the method and the device for adaptively adjusting the rotating speed of the wind generating set of the embodiment of the invention adaptively adjust the minimum operating rotating speed according to the wind resource of the mounting machine site of the wind generating set and by considering three factors of the resonance interval, the self-consumption electric power and the start-stop frequency of the wind generating set, and adaptively adjust the maximum operating rotating speed by combining the turbulence intensity value of the mounting machine site of the wind generating set and the load of the wind generating set, thereby optimizing the power generation performance of the wind generating set, ensuring the operating safety of the wind generating set and effectively improving the economy of the wind generating set.
There is also provided, in accordance with an embodiment of the present invention, a computer-readable storage medium. The computer readable storage medium stores a computer program which, when executed by a processor, causes the processor to perform the method of adaptively adjusting the rotational speed of a wind park as described above.
There is also provided, in accordance with an embodiment of the present invention, a computing device. The computing device includes a processor and a memory. The memory is for storing program instructions. The program instructions are executed by a processor to cause the processor to execute a computer program of the method for adaptively adjusting the rotational speed of a wind park as described above.
Further, it should be understood that each unit in the apparatus for adaptively adjusting the rotational speed of a wind turbine generator set according to an exemplary embodiment of the present invention may be implemented as a hardware component and/or a software component. The individual units may be implemented, for example, using Field Programmable Gate Arrays (FPGAs) or Application Specific Integrated Circuits (ASICs), depending on the processing performed by the individual units as defined by the skilled person.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.

Claims (20)

1. A method of adaptively adjusting a rotational speed of a wind turbine generator system, comprising:
determining wind resources of a mounting machine site of the wind generating set;
determining the starting and stopping frequency of the wind generating set, the turbulence intensity value of the installing machine site and the load of the wind generating set according to the determined wind resources;
adjusting a minimum operating speed of the wind generating set based on a blade passing frequency of the wind generating set, a tower first-order natural frequency of the wind generating set, the start-stop frequency and an output power of the wind generating set;
adjusting a maximum operating speed of the wind turbine generator set based on the rated speed limit value, the turbulence intensity value and the load of the wind turbine generator set,
wherein the step of adjusting the minimum operating speed of the wind turbine generator system comprises:
a minimum rotating speed obtaining step: acquiring the current minimum running rotating speed of the wind generating set, and taking the current minimum running rotating speed as a first minimum rotating speed;
a first comparison step: acquiring a first blade passing frequency and a first tower first-order natural frequency corresponding to the first minimum rotating speed, and determining whether a first ratio between the first blade passing frequency and the first tower first-order natural frequency is greater than or equal to a first preset threshold value;
a second comparison step: when the first ratio is determined to be greater than or equal to the first preset threshold, determining whether a first start-stop frequency of the wind generating set corresponding to the first minimum rotating speed is less than or equal to a preset threshold;
a third comparison step: when the first start-up and shut-down frequency is determined to be smaller than or equal to the preset threshold value, determining whether the first output power of the wind generating set corresponding to the first minimum rotating speed is larger than or equal to the self-consumption power of the wind generating set;
a first minimum rotation speed updating step: updating the first minimum rotational speed to a difference between the first minimum rotational speed and a minimum operating rotational speed optimization step when it is determined that the first output power is greater than or equal to a self-consumed electrical power of the wind turbine generator set;
a frequency acquisition step: acquiring a second blade passing frequency and a second tower first-order natural frequency corresponding to the first minimum rotating speed;
a first minimum rotation speed determination step: determining a sum of the first minimum rotation speed and a minimum operation rotation speed optimization step size as a minimum operation rotation speed of the wind turbine generator set when it is determined that a second ratio between the second blade passing frequency and the second tower first-order natural frequency is smaller than the first preset threshold value, or when it is determined that a second start-stop frequency of the wind turbine generator set corresponding to the first minimum rotation speed is larger than the preset threshold value, or when it is determined that a second output power of the wind turbine generator set corresponding to the first minimum rotation speed is smaller than a self-consumption power of the wind turbine generator set.
2. The method of claim 1, wherein the step of determining the wind resources of the installer site of the wind park comprises:
acquiring wind resource data of a mounting machine site of the wind generating set;
determining wind speed probability density distribution and wind energy parameters of a mounting machine site of the wind generating set by using a wind power plant flow field simulation method and combining the wind resource data,
the wind resource data comprise wind speed data, wind direction data and air density data.
3. The method of claim 2, wherein the step of determining a frequency of start-ups and shut-downs of the wind park, a turbulence intensity value of the installer site and a load of the wind park from the determined wind resources comprises:
determining the start-up and shut-down frequency using the wind speed probability density distribution;
determining the turbulence intensity value using the wind energy parameter;
determining the load using the wind energy parameter and a maximum operating speed of the wind turbine.
4. The method of claim 1, wherein the step of adjusting the minimum operating speed of the wind turbine further comprises:
a second minimum rotating speed updating step: when it is determined that the second ratio is greater than or equal to the first preset threshold, and when it is determined that the second startup and shutdown frequency is less than or equal to the predetermined threshold, and when it is determined that the second output power is greater than or equal to the self-consumed power of the wind turbine generator set, updating the first minimum rotation speed to a difference between the first minimum rotation speed and a minimum operation rotation speed optimization step, and returning to the frequency obtaining step.
5. The method of claim 1, wherein the step of adjusting the minimum operating speed of the wind turbine further comprises:
a third minimum rotating speed updating step: when the first ratio is determined to be smaller than the first preset threshold, or when the first start-stop frequency is determined to be larger than the preset threshold, or when the first output power is determined to be smaller than the self-consumption power of the wind generating set, updating the first minimum rotating speed to be the sum of the first minimum rotating speed and a minimum operation rotating speed optimization step length, and returning to the first comparison step.
6. The method of claim 1, wherein the step of adjusting the maximum operating speed of the wind turbine generator set comprises:
and (3) comparing the turbulence intensity: determining whether the turbulence intensity value is less than or equal to a preset turbulence intensity value;
a first maximum rotation speed obtaining step: when the turbulence intensity value is determined to be smaller than or equal to a preset turbulence intensity value, acquiring the current maximum operation rotating speed of the wind generating set, and taking the current maximum operation rotating speed as a first maximum rotating speed;
a first maximum rotation speed updating step: updating the first maximum rotation speed to be the sum of the first maximum rotation speed and the maximum operation rotation speed optimization step length;
a first determination step: determining whether the load of the wind generating set corresponding to the first maximum rotating speed is greater than or equal to a preset load of the wind generating set;
a second determination step: when it is determined that the load is less than the preset load, determining whether the first maximum rotational speed is less than or equal to a rated rotational speed limit value of the wind turbine generator set;
a maximum rotating speed determining step: determining the first maximum rotational speed as a maximum operating rotational speed of the wind turbine generator set when it is determined that the first maximum rotational speed is less than or equal to the rated rotational speed limit.
7. The method of claim 6, wherein the step of adjusting the maximum operating speed of the wind turbine generator set further comprises:
a first step length updating step: when the load is determined to be larger than or equal to the preset load or when the first maximum rotating speed is determined to be larger than the rated rotating speed limit value, the maximum operating rotating speed optimization step length is updated to be one half of the maximum operating rotating speed optimization step length, the current maximum operating rotating speed of the wind generating set is obtained, the current maximum operating rotating speed is used as the first maximum rotating speed, and the step of updating the first maximum rotating speed is returned.
8. The method of claim 6, wherein the step of adjusting the maximum operating speed of the wind turbine generator set further comprises:
a second maximum rotation speed obtaining step: when the turbulence intensity value is determined to be larger than a preset turbulence intensity value, acquiring the current maximum operation rotating speed of the wind generating set, and taking the current maximum operation rotating speed as a first maximum rotating speed;
a second maximum rotating speed updating step: updating the first maximum rotating speed to be the difference between the first maximum rotating speed and the maximum operation rotating speed optimization step length;
a third determination step: determining whether the load of the wind generating set corresponding to the first maximum rotating speed is greater than or equal to a preset load of the wind generating set;
a third maximum rotation speed obtaining step: and when the load is determined to be smaller than the preset load, acquiring the current maximum operation rotating speed of the wind generating set, taking the current maximum operation rotating speed as the first maximum rotating speed, and returning to the first maximum rotating speed updating step.
9. The method of claim 8, wherein the step of adjusting the maximum operating speed of the wind turbine generator set further comprises:
a second step of long updating: and when the load is determined to be greater than or equal to the preset load, updating the maximum operation rotating speed optimization step length to be twice of the maximum operation rotating speed optimization step length, acquiring the current maximum operation rotating speed of the wind generating set, taking the current maximum operation rotating speed as the first maximum rotating speed, and returning to the second maximum rotating speed updating step.
10. An apparatus for adaptively adjusting a rotational speed of a wind turbine generator system, comprising:
the wind resource determining module is used for determining the wind resource of the mounting machine site of the wind generating set;
the parameter determination module is used for determining the starting and stopping frequency of the wind generating set, the turbulence intensity value of the mounting machine site and the load of the wind generating set according to the determined wind resources;
the minimum rotating speed adjusting module is used for adjusting the minimum operating rotating speed of the wind generating set based on the blade passing frequency of the wind generating set, the tower first-order natural frequency of the wind generating set, the starting and stopping frequency and the output power of the wind generating set;
a maximum rotation speed adjustment module that adjusts a maximum operating rotation speed of the wind turbine generator set based on a rated rotation speed limit value of the wind turbine generator set, the turbulence intensity value, and the load,
wherein, minimum rotational speed adjustment module includes:
minimum rotational speed acquisition unit: acquiring the current minimum running rotating speed of the wind generating set, and taking the current minimum running rotating speed as a first minimum rotating speed;
a first comparison unit: acquiring a first blade passing frequency and a first tower first-order natural frequency corresponding to the first minimum rotating speed, and determining whether a first ratio between the first blade passing frequency and the first tower first-order natural frequency is greater than or equal to a first preset threshold value;
a second comparing unit: when the first ratio is determined to be greater than or equal to the first preset threshold, determining whether a first start-stop frequency of the wind generating set corresponding to the first minimum rotating speed is less than or equal to a preset threshold;
a third comparing unit: when the first start-up and shut-down frequency is determined to be smaller than or equal to the preset threshold value, determining whether the first output power of the wind generating set corresponding to the first minimum rotating speed is larger than or equal to the self-consumption power of the wind generating set;
a first minimum rotation speed updating unit: updating the first minimum rotational speed to a difference between the first minimum rotational speed and a minimum operating rotational speed optimization step when it is determined that the first output power is greater than or equal to a self-consumed electrical power of the wind turbine generator set;
a frequency acquisition unit: acquiring a second blade passing frequency and a second tower first-order natural frequency corresponding to the first minimum rotating speed;
a first minimum rotation speed determination unit: determining a sum of the first minimum rotation speed and a minimum operation rotation speed optimization step size as a minimum operation rotation speed of the wind turbine generator set when it is determined that a second ratio between the second blade passing frequency and the second tower first-order natural frequency is smaller than the first preset threshold value, or when it is determined that a second start-stop frequency of the wind turbine generator set corresponding to the first minimum rotation speed is larger than the preset threshold value, or when it is determined that a second output power of the wind turbine generator set corresponding to the first minimum rotation speed is smaller than a self-consumption power of the wind turbine generator set.
11. The apparatus of claim 10, wherein the wind resource determination module obtains wind resource data of a mounting machine site of the wind turbine generator system and determines a wind speed probability density distribution and wind energy parameters of the mounting machine site of the wind turbine generator system in combination with the wind resource data using a wind farm flow field simulation method,
the wind resource data comprise wind speed data, wind direction data and air density data.
12. The apparatus of claim 11, wherein a parameter determination module determines the frequency of start-ups and shut-downs using the wind speed probability density distribution, determines the turbulence intensity value using the wind energy parameter, and determines the load using the wind energy parameter and a maximum operating speed of the wind turbine.
13. The apparatus of claim 10, wherein the minimum rotation speed adjustment module further comprises:
a second minimum rotation speed updating unit: when it is determined that the second ratio is greater than or equal to the first preset threshold, and when it is determined that the second startup and shutdown frequency is less than or equal to the predetermined threshold, and when it is determined that the second output power is greater than or equal to the self-consumed power of the wind turbine generator set, updating the first minimum rotation speed to a difference between the first minimum rotation speed and a minimum operation rotation speed optimization step size, and providing the updated first minimum rotation speed to the frequency acquisition unit.
14. The apparatus of claim 10, wherein the minimum rotation speed adjustment module further comprises:
a third minimum rotation speed updating unit: when the first ratio is determined to be smaller than the first preset threshold, or when the first start-stop frequency is determined to be larger than the preset threshold, or when the first output power is determined to be smaller than the self-consumption power of the wind generating set, the first minimum rotating speed is updated to be the sum of the first minimum rotating speed and a minimum operation rotating speed optimization step length, and the updated first minimum rotating speed is provided to a first comparison unit.
15. The apparatus of claim 10, wherein the maximum speed adjustment module comprises:
turbulence intensity comparison unit: determining whether the turbulence intensity value is less than or equal to a preset turbulence intensity value;
a first maximum rotation speed acquisition unit: when the turbulence intensity value is determined to be smaller than or equal to a preset turbulence intensity value, acquiring the current maximum operation rotating speed of the wind generating set, and taking the current maximum operation rotating speed as a first maximum rotating speed;
a first maximum rotation speed updating unit: updating the first maximum rotation speed to be the sum of the first maximum rotation speed and the maximum operation rotation speed optimization step length;
a first determination unit: determining whether the load of the wind generating set corresponding to the first maximum rotating speed is greater than or equal to a preset load of the wind generating set;
a second determination unit: when it is determined that the load is less than the preset load, determining whether the first maximum rotational speed is less than or equal to a rated rotational speed limit value of the wind turbine generator set;
maximum rotation speed determination unit: determining the first maximum rotational speed as a maximum operating rotational speed of the wind turbine generator set when it is determined that the first maximum rotational speed is less than or equal to the rated rotational speed limit.
16. The apparatus of claim 15, wherein the maximum speed adjustment module further comprises:
a first step size updating unit: when the load is determined to be larger than or equal to the preset load or when the first maximum rotating speed is determined to be larger than the rated rotating speed limit value, the maximum operating rotating speed optimization step length is updated to be one half of the maximum operating rotating speed optimization step length, the current maximum operating rotating speed of the wind generating set is obtained, the current maximum operating rotating speed is used as the first maximum rotating speed, and the first maximum rotating speed is provided to a first maximum rotating speed updating unit.
17. The apparatus of claim 15, wherein the maximum speed adjustment module further comprises:
a second maximum rotation speed acquisition unit: when the turbulence intensity value is determined to be larger than a preset turbulence intensity value, acquiring the current maximum operation rotating speed of the wind generating set, and taking the current maximum operation rotating speed as a first maximum rotating speed;
a second maximum rotation speed updating unit: updating the first maximum rotating speed to be the difference between the first maximum rotating speed and the maximum operation rotating speed optimization step length;
a third determination unit: determining whether the load of the wind generating set corresponding to the first maximum rotating speed is greater than or equal to a preset load of the wind generating set;
a third maximum rotation speed acquisition unit: and when the load is determined to be smaller than the preset load, acquiring the current maximum operation rotating speed of the wind generating set, taking the current maximum operation rotating speed as the first maximum rotating speed, and providing the first maximum rotating speed for a first maximum rotating speed updating unit.
18. The apparatus of claim 17, wherein the maximum speed adjustment module further comprises:
a second step length updating unit: when the load is determined to be larger than or equal to the preset load, updating the maximum operation rotating speed optimization step length to be twice of the maximum operation rotating speed optimization step length, obtaining the current maximum operation rotating speed of the wind generating set, taking the current maximum operation rotating speed as the first maximum rotating speed, and providing the first maximum rotating speed for a second maximum rotating speed updating unit.
19. A computer-readable storage medium, characterized in that a computer program is stored which, when being executed by a processor, causes the processor to carry out the method of adaptively adjusting a rotational speed of a wind park according to any one of claims 1 to 9.
20. A computing device, comprising:
a processor;
a memory for storing a computer program which, when executed by the processor, causes the processor to perform a method of adaptively adjusting a rotational speed of a wind park according to any of claims 1 to 9.
CN201810169240.2A 2018-02-28 2018-02-28 Method and device for adaptively adjusting rotating speed of wind generating set Active CN110206681B (en)

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