CN113007034B - Method and device for correcting pneumatic unbalance of impeller - Google Patents
Method and device for correcting pneumatic unbalance of impeller Download PDFInfo
- Publication number
- CN113007034B CN113007034B CN201911324459.6A CN201911324459A CN113007034B CN 113007034 B CN113007034 B CN 113007034B CN 201911324459 A CN201911324459 A CN 201911324459A CN 113007034 B CN113007034 B CN 113007034B
- Authority
- CN
- China
- Prior art keywords
- impeller
- blades
- pitch angle
- pneumatic
- state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000010248 power generation Methods 0.000 claims description 10
- 238000004590 computer program Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 230000001351 cycling effect Effects 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims 2
- 239000000758 substrate Substances 0.000 claims 1
- 230000001133 acceleration Effects 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/30—Commissioning, e.g. inspection, testing or final adjustment before releasing for production
- F03D13/35—Balancing static or dynamic imbalances
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
A method and apparatus for correcting impeller aerodynamic imbalance is provided. The method comprises the following steps: determining whether an impeller of the wind generating set is in a pneumatic unbalanced state; when the impeller is determined to be in a pneumatic unbalanced state, determining a pitch angle optimizing range; and sequentially setting target pitch angles of a plurality of blades of the impeller to be a value in a determined pitch angle optimizing range in a circulating manner until the set target pitch angles of the plurality of blades enable the impeller to be in an aerodynamic balance state, wherein the set target pitch angles of the plurality of blades are different from at least part of the set target pitch angles of the plurality of blades in the last circulating manner. According to the method and the device, the pneumatic unbalance of the impeller can be accurately, quickly and automatically corrected.
Description
Technical Field
The present invention relates generally to the field of wind power generation technology, and more particularly, to a method and apparatus for correcting aerodynamic unbalance of an impeller.
Background
In the design simulation stage of the wind generating set, control parameters of the wind generating set are designed according to a mathematical model of the whole wind generating set (such as a blade, a tower, a variable pitch and variable current system, etc.), wherein the control parameters comprise optimal pitch angle parameters of the wind generating set. When the wind generating set is in operation, if the output power of the wind generating set is smaller than the rated power, the pitch angle of the blades will be fixed at the optimal pitch angle in order to obtain the maximum energy from the wind energy by the blades.
However, during field installation, due to installation errors or mistakes, a deviation between the actual pitch angle of the blade(s) and the optimal pitch angle may occur, thereby creating an aerodynamic imbalance of the blade. In addition, some environmental factors during operation of the unit may also cause aerodynamic imbalance of the impeller, such as accumulation of contaminants on the blade surfaces and uneven distribution among the different blades, and in addition, icing of the blade surfaces may also cause aerodynamic imbalance of the impeller.
Since the impeller system is a rotating component with large inertia (especially for a permanent magnet direct drive unit), the pneumatic unbalance of the impeller can cause adverse effects on the safe and stable operation of the unit: 1) The output of the unit is reduced, and the efficiency of absorbing wind energy by the blades is reduced due to the deviation between the actual pitch angle and the optimal pitch angle of the blades of the unit; 2) The service life of the main shaft of the generator is influenced, because in the running process of the unit under the condition of pneumatic unbalance of the impeller, the impeller system has offset load with a certain angle relative to the main shaft of the generator and repeatedly appears in a certain period, thereby influencing the service life of the main shaft of the generator; 3) Frequent unit faults are caused, because the existence of pneumatic unbalance of the impeller leads to unbalanced thrust born by the impeller plane, so that under certain working conditions, the acceleration of a unit cabin exceeds a threshold value, and unit vibration faults are caused.
However, the prior art cannot automatically and conveniently correct the pneumatic unbalance of the impeller, and is inconvenient to correct the pneumatic unbalance of the impeller timely and accurately so as to avoid the adverse effects as far as possible.
Disclosure of Invention
An exemplary embodiment of the invention provides a method and a device for correcting pneumatic unbalance of an impeller, which are used for solving the problem that the pneumatic unbalance of the impeller cannot be automatically and conveniently corrected in the prior art.
According to an exemplary embodiment of the present invention, there is provided a method of correcting an impeller aerodynamic imbalance, the method comprising: determining whether an impeller of the wind generating set is in a pneumatic unbalanced state; when the impeller is determined to be in a pneumatic unbalanced state, determining a pitch angle optimizing range; and sequentially setting target pitch angles of a plurality of blades of the impeller to be a value in a determined pitch angle optimizing range in a circulating manner until the set target pitch angles of the plurality of blades enable the impeller to be in an aerodynamic balance state, wherein the set target pitch angles of the plurality of blades are different from at least part of the set target pitch angles of the plurality of blades in the last circulating manner.
Optionally, the method further comprises: respectively aiming at each blade, acquiring a difference value between a target pitch angle set for the blade in the cycle and a preset optimal pitch angle when the cycle is stopped, and taking the difference value as a deviation between a pitch angle theoretical value and a pitch angle actual value for the blade; and correcting the pitch angle theoretical value of the blade based on the deviation between the pitch angle theoretical value and the pitch angle actual value of the blade, wherein the actual pitch angle of each blade is the optimal pitch angle when the impeller is in an aerodynamic balance state.
Optionally, the step of cycling sequentially sets target pitch angles of a plurality of blades of the impeller to a value within a determined pitch angle optimizing range until the set target pitch angles of the plurality of blades bring the impeller to an aerodynamic balance state, comprises: setting the target pitch angle of one part of the blades to be a preset optimal pitch angle when each cycle is performed, and setting the target pitch angle of the other part of the blades to be a value which is in the pitch angle optimizing range and is different from the value set in the last cycle; after the pitching of the target pitch angles of the plurality of blades set for the present cycle is completed, determining whether the impeller is in a pneumatic balance state, wherein when the impeller is determined to be in the pneumatic balance state, stopping the cycle; when the impeller is determined to be in a pneumatic imbalance state, the next cycle is entered.
Optionally, the step of cycling sequentially sets target pitch angles of a plurality of blades of the impeller to a value within a determined pitch angle optimizing range until the set target pitch angles of the plurality of blades bring the impeller to an aerodynamic balance state, comprises: after the pitch angle optimizing range is determined, when the wind generating set is detected to be in a specific running state, starting to circularly and sequentially set the target pitch angles of the blades of the impeller to be a value in the determined pitch angle optimizing range until the set target pitch angles of the blades enable the impeller to be in a pneumatic balance state; the step of determining whether the impeller is in an aerodynamic balance state after completing pitching of the target pitch angles of the plurality of blades set for the present cycle comprises: after the target pitch angles of the blades set for the current cycle are changed to reach a preset duration, determining whether an impeller is in a pneumatic balance state when the wind generating set is detected to be in the specific running state, wherein the specific running state meets the following conditions: normal power generation is performed without limiting electricity, the rotating speed of the impeller reaches the rated rotating speed, and the output power does not reach the rated power.
Optionally, the step of determining whether the impeller of the wind turbine is in an aerodynamically unbalanced state comprises: when the impeller pneumatic unbalance degree of the wind generating set is larger than or equal to a preset impeller pneumatic unbalance degree constant, determining that the impeller is in a pneumatic unbalance state; in the step of cyclically setting target pitch angles of a plurality of blades of an impeller to a value within a determined pitch angle optimizing range in sequence until the set target pitch angles of the plurality of blades enable the impeller to be in a pneumatic balance state, determining that the impeller is in the pneumatic balance state when the impeller pneumatic unbalance degree of the wind generating set is smaller than the preset impeller pneumatic unbalance degree constant, wherein the impeller pneumatic unbalance degree of the wind generating set is: the ratio of the energy amplitude of the vibration signal of the wind generating set at the rotation frequency of one time of the impeller to the energy amplitude of the vibration signal at the rotation frequency of three times of the impeller.
Optionally, the step of determining the pitch angle optimizing range when the impeller is determined to be in a pneumatic imbalance state comprises: and when the impeller is determined to be in an aerodynamic imbalance state, determining the pitch angle optimizing range based on the pitch angle relative deviation angle between the current blades, wherein the pitch angle relative deviation angle between the current blades is the maximum value of the phase difference angle between every two of the current actual pitch angles of the plurality of blades.
Optionally, the step of determining the pitch angle optimizing range based on the pitch angle relative deviation angle between the current blades comprises: and determining the pitch angle optimizing range as [ beta- |theta|, beta+|theta|], wherein theta is the relative deviation angle of the pitch angle between the current blades, and beta is the preset optimal pitch angle.
Optionally, the method further comprises: determining a target pitch angle of the plurality of blades set to minimize the aerodynamic imbalance of the impeller throughout the cycle when the maximum number of cycles has been reached; the blades are pitched to a determined target pitch angle to bring the impeller closest to the aerodynamic equilibrium state.
According to another exemplary embodiment of the present invention, there is provided an apparatus for correcting an impeller aerodynamic imbalance, the apparatus comprising: the state determining unit is used for determining whether the impeller of the wind generating set is in a pneumatic unbalanced state or not; the optimizing range determining unit is used for determining the pitch angle optimizing range when determining that the impeller is in a pneumatic unbalanced state; and the circulation setting unit is used for sequentially setting the target pitch angles of the plurality of blades of the impeller to be a value in the determined pitch angle optimizing range in a circulation mode until the set target pitch angles of the plurality of blades enable the impeller to be in an aerodynamic balance state, wherein the target pitch angles of the plurality of blades are different from at least part of the set target pitch angles of the plurality of blades in the last circulation.
Optionally, the apparatus further comprises: the deviation determining unit is used for respectively obtaining, for each blade, a difference value between a target pitch angle set for the blade and a preset optimal pitch angle in the cycle when the cycle is stopped, and the difference value is used as a deviation between a pitch angle theoretical value and a pitch angle actual value for the blade; and a correction unit for correcting the theoretical pitch angle value of the blade based on the deviation between the theoretical pitch angle value and the actual pitch angle value of the blade, wherein the actual pitch angle of each blade is the optimal pitch angle when the impeller is in an aerodynamic balance state.
Optionally, the cycle setting unit sets the target pitch angle of a part of the blades in the plurality of blades to a preset optimal pitch angle and sets the target pitch angle of another part of the blades in the plurality of blades to a value within the pitch angle optimizing range and different from the value set in the previous cycle when performing each cycle; after the pitching of the target pitch angles of the plurality of blades set for the present cycle is completed, the state determining unit determines whether the impeller is in a pneumatic balance state, wherein the cycle setting unit stops the cycle when it is determined that the impeller is in the pneumatic balance state; when it is determined that the impeller is in a pneumatic imbalance state, the cycle setting unit enters the next cycle.
Optionally, after determining the pitch angle optimizing range, when detecting that the wind generating set is in a specific running state, the circulation setting unit starts to sequentially set the target pitch angles of the plurality of blades of the impeller to a value within the determined pitch angle optimizing range, until the set target pitch angles of the plurality of blades enable the impeller to be in a pneumatic balance state, and stops circulation; the state determining unit determines whether the impeller is in a pneumatic balance state when detecting that the wind generating set is in the specific running state after finishing the pitching of the target pitch angles of the blades set for the current cycle for a preset time period, wherein the specific running state meets the following conditions: normal power generation is performed without limiting electricity, the rotating speed of the impeller reaches the rated rotating speed, and the output power does not reach the rated power.
Optionally, the state determining unit determines that the impeller is in a pneumatic unbalanced state when the pneumatic unbalance of the impeller of the wind generating set is greater than or equal to a preset impeller pneumatic unbalance constant; the state determining unit determines that the impeller is in a pneumatic balance state when the pneumatic unbalance degree of the impeller of the wind generating set is smaller than a preset pneumatic unbalance degree constant of the impeller, wherein the pneumatic unbalance degree of the impeller of the wind generating set is as follows: the ratio of the energy amplitude of the vibration signal of the wind generating set at the rotation frequency of one time of the impeller to the energy amplitude of the vibration signal at the rotation frequency of three times of the impeller.
Optionally, when determining that the impeller is in the aerodynamic imbalance state, the optimizing range determining unit determines the pitch angle optimizing range based on a pitch angle relative deviation angle between current blades, wherein the pitch angle relative deviation angle between the current blades is a maximum value of angles of phase difference between every two of the current actual pitch angles of the plurality of blades.
Optionally, the optimizing range determining unit determines the pitch angle optimizing range as [ beta- |θ|, beta+|θ|], where θ is a relative deviation angle of the pitch angles between the current blades, and β is a preset optimal pitch angle.
Optionally, the cycle setting unit determines a target pitch angle of the plurality of blades set to minimize the aerodynamic imbalance of the impeller throughout the cycle when the maximum number of cycles has been reached; and pitching the blades to a determined target pitch angle to bring the impeller closest to the aerodynamic equilibrium state.
According to another exemplary embodiment of the invention, a computer readable storage medium is provided, having stored thereon a computer program, which when executed by a processor, implements a method of correcting an impeller aerodynamic imbalance as described above.
According to another exemplary embodiment of the present invention, there is provided a control device of a wind power generation set, the control device including: a processor; a memory storing a computer program which, when executed by a processor, implements a method of correcting an impeller aerodynamic imbalance as described above.
According to the method and the device for correcting the pneumatic unbalance of the impeller, disclosed by the embodiment of the invention, the pneumatic unbalance of the impeller caused by any reason can be accurately, quickly and automatically corrected without additional hardware equipment, so that the pitch angle of the blades can be conveniently and timely adjusted to enable the impeller to be in a pneumatic balance state, the situations of out-of-limit alarm shutdown, power generation loss, influence on the service life of a main shaft of a generator and the like caused by the pneumatic unbalance of the impeller are avoided, and shutdown is not needed during correction. In addition, the theoretical value of the blade pitch angle in the control system of the wind power generator set can be corrected and calibrated.
Additional aspects and/or advantages of the present general inventive concept 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 general inventive concept.
Drawings
The foregoing and other objects and features of exemplary embodiments of the invention will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate exemplary embodiments in which:
FIG. 1 illustrates a flow chart of a method of correcting an impeller aerodynamic imbalance according to an exemplary embodiment of the invention;
FIG. 2 illustrates a block diagram of an apparatus for correcting impeller aerodynamic imbalance in accordance with an exemplary embodiment of the present invention;
fig. 3 shows a block diagram of a control device of a wind power plant according to an exemplary embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments will be described below in order to explain the present invention by referring to the figures.
FIG. 1 illustrates a flow chart of a method of correcting impeller aerodynamic imbalance according to an exemplary embodiment of the invention.
Referring to fig. 1, in step S10, it is determined whether the impeller of the wind turbine is in an aerodynamically unbalanced state.
As an example, step S10 may be periodically performed.
As an example, when the impeller aerodynamic unbalance of the wind generating set is greater than or equal to a preset impeller aerodynamic unbalance constant, determining that the impeller is in an aerodynamic unbalance state, wherein the impeller aerodynamic unbalance of the wind generating set is: the ratio of the energy amplitude of the vibration signal of the wind generating set at the rotation frequency of one time of the impeller to the energy amplitude of the vibration signal at the rotation frequency of three times of the impeller. It should be appreciated that other suitable methods may be used to determine whether the rotor of the wind turbine is in an aerodynamically unbalanced state, as the invention is not limited in this regard.
As an example, operational data of the wind turbine set may be obtained after the wind turbine set is in a specific operational state for a first preset period of time, and an energy amplitude of a vibration signal of the wind turbine set at one rotation frequency of the impeller and an energy amplitude of the wind turbine set at three rotation frequencies of the impeller may be determined based on the obtained operational data, wherein the wind turbine set is still in the specific operational state during the second preset period of time.
As an example, the specific operation state may satisfy the following condition: normal power generation without limiting electricity,The rotating speed of the impeller reaches the rated rotating speed, and the output power does not reach the rated power. The rotating speed of the impeller reaches the rated rotating speed, the output power does not reach the rated power, namely no pitch motion exists, and the rotating speed of the impeller is in a specific range, wherein the specific range is as follows: greater than or equal to gamma omega max Wherein, gamma is a preset impeller rotation speed coefficient omega max For the rated rotational speed of the impeller (e.g., the maximum rotational speed of the impeller is designed), γ is a number greater than 0 and less than or equal to 1.
Wind power belongs to an unstable power source, and due to power grid consumption problems or capacity limitation of a wind farm, the power generation capacity of a wind generating set may need to be limited, for example: the original output power of the machine can reach 1000kW under the condition of 7m/s wind, but can be limited to 600kW. Typically, a flag bit (e.g., a flag bit of 1 indicates a power limit state and a flag bit of 0 indicates a power non-limit state) may be set in the control system as an input to a subsequent unit power curve or other control module.
Considering that the rotation speed of the impeller is greatly influenced by the change of wind speed (turbulence) during the running process of the unit, a certain fluctuation exists under normal conditions, and therefore, the rotation speed omega of the impeller is larger than or equal to gamma-omega max The rotational speed of the impeller may be considered to reach the rated rotational speed. As an example, the rotation speed ω may be an average rotation speed. As an example, γ may be set according to actual conditions, and for example, the setting range of γ may be 0.8 to 1.
As an example, a wind power plant being in said specific operating state may be understood as a "transition" of the wind power plant operating on the power curve of the plant, since it is considered that the rotational speed of the impeller at this stage is substantially stable at the rated rotational speed and the output power has not yet reached the rated power, without a pitching action, facilitating the determination of the energy amplitude of the vibration signal of the wind power plant at one rotation frequency of the impeller and at three rotation frequencies of the impeller.
As an example, the acquired operational data may include: the rotational speed of the wind generating set, the operational data for describing the vibration intensity of the wind generating set. For example, operational data describing the vibration intensity of a wind turbine may include: an acceleration signal of the wind power plant in the axial direction of the nacelle (X-direction) and/or an acceleration signal in the lateral direction of the nacelle (Y-direction).
The frequency of one rotation of the impeller indicates the frequency of each revolution of the blade. Considering that the vibration of the wind generating set along the axial direction of the nacelle is greatly influenced when the impeller is in a pneumatic unbalanced state, as an example, the vibration signal of the wind generating set may be: and the wind generating set is provided with a vibration signal along the axial direction of the cabin.
As an example, the energy (e.g., power) amplitude of the vibration signal of the wind turbine at the one-time rotation frequency and three-time rotation frequency of the impeller may be determined by performing a spectral analysis of the vibration signal of the wind turbine (e.g., the acceleration signal of the nacelle in the X-direction).
As an example, the spectral analysis may be performed by a fast fourier transform FFT and/or a power spectral density PSD.
When it is determined that the impeller is in the aerodynamic imbalance state at step S10, step S20 is performed to determine a pitch angle optimizing range to find a target pitch angle of the blade that enables the impeller to be in the aerodynamic imbalance state within the determined pitch angle optimizing range.
Considering that the degree of the impeller aerodynamic unbalance is related to the pitch angle relative deviation angle between the blades, the pitch angle optimizing range may be determined based on the pitch angle relative deviation angle between the current blades, which is the maximum value of absolute values of angles of phase difference between every two of the current actual pitch angles of the plurality of blades, as an example.
For example, if the actual pitch angles of 3 blades of the impeller are 0 °,1.5 °, and 2 °, respectively, the pitch angle relative deviation angle between the blades is a maximum value of 2 ° out of (2 ° -0 °), (1.5 ° -0 °), (2 ° -1.5 °).
As an example, the relative deviation angle of the pitch angle between the current blades may be determined using various suitable manners, e.g., the relative deviation angle of the pitch angle between the current blades may be determined based on the current rotor aerodynamic imbalance of the wind turbine, and the relative deviation angle of the pitch angle between the current blades may be determined by analyzing the captured rotor image.
As an example, the pitch angle optimizing range may be determined as [ β - |θ|, β+|θ| ], where θ is a pitch angle relative deviation angle between current blades, and β is a preset optimal pitch angle.
In step S30, the target pitch angles of the plurality of blades of the impeller are sequentially set to values within the determined pitch angle optimizing range in a circulating manner until the set target pitch angles of the plurality of blades bring the impeller into an aerodynamic balance state. In other words, when the cycle is stopped, the impeller aerodynamic imbalance has been corrected and the impeller is in an aerodynamic equilibrium state.
Here, the plurality of target pitch angles set for the plurality of blades at each cycle are at least partially different from the one set at the last cycle, i.e. the target pitch angles set for each cycle are not exactly the same. It will be appreciated that the plurality of blades corresponds one-to-one to the plurality of target pitch angles, i.e. one corresponding target pitch angle is set for each blade at each cycle.
It should be appreciated that the target pitch angles of the plurality of blades may be at least different each time a cycle is performed. For example, when the impeller has 3 blades, the target pitch angle of at least two of the three blades differs at each cycle.
As an example, in step S30, it may be determined that the impeller is in a pneumatic balance state when the impeller pneumatic unbalance of the wind generating set is smaller than the preset impeller pneumatic unbalance constant.
As an example, after the pitch angle optimizing range is determined, when it is detected that the wind turbine is in the specific operation state, a cycle may be started to sequentially set the target pitch angles of the plurality of blades of the rotor to values within the determined pitch angle optimizing range until the set target pitch angle brings the rotor to a pneumatically balanced state (i.e., the execution of step S30 is started).
As an example, the target pitch angle of a part of the plurality of blades may be set to a preset optimal pitch angle at each cycle, and the target pitch angle of another part of the plurality of blades may be set to a value within the pitch angle optimizing range and different from the value set at the previous cycle; after finishing the pitching of the target pitch angle set for the present cycle (i.e., controlling all blades to pitch to the set corresponding target pitch angle), determining whether the impeller is in a pneumatically balanced state, wherein the cycle is stopped when it is determined that the impeller is in a pneumatically balanced state; when the impeller is determined to be in a pneumatic imbalance state, the next cycle is entered.
As an example, it may be determined whether the impeller is in an aerodynamic balance state when it is detected that the wind turbine is in the specific operation state after the completion of the pitching of the target pitch angle set for the present cycle for a preset period of time (e.g., 5 min). In other words, after the pitch change of the target pitch angle set for the current cycle is completed, the wind turbine stays for a period of time, and when the running of the wind turbine generator is stable and the running state meets the requirement, whether the impeller is in the pneumatic balance state is determined.
For example, the impeller has 3 blades (b 1, b2, b 3), the pitch angle optimizing range is [ β - |θ|, β+|θ| ], the optimizing step is Δ, and when each cycle is performed, the pitch angle of 1 blade is adjusted compared to the previous cycle (i.e., the target pitch angle of 2 blades is changed and the pitch is performed compared to the previous cycle), the target pitch angle of 2 blades is made to be the optimal pitch angle, and during the whole cycle, each blade except the optimal pitch angle is set to have the target pitch angle as shown in formula (1), blade b1 corresponds to the first row in the matrix on the right side in formula (1), blade b2 corresponds to the second row in the matrix on the right side in formula (1), and blade b3 corresponds to the third row in the matrix on the right side in formula (1).
Accordingly, the entire cycle may be: firstly adjusting the pitch angle of the blade b1, specifically, continuously setting the target pitch angles of the blades b2 and b3 to be the optimal pitch angle, and sequentially setting the target pitch angle of the blade b1 to be the value in the first row in the formula (1), for example, when the first cycle is performed, setting the target pitch angle of the blade b1 to be the first value in the first row, setting the target pitch angles of the blades b2 and b3 to be the optimal pitch angle, if the impeller is still in the aerodynamic imbalance state after the pitch for the target pitch angle set for the current cycle is completed, setting the target pitch angle of the blade b1 to be the next value in the first row again, keeping the target pitch angles of the blades b2 and b3 unchanged, and if the impeller is in the aerodynamic balance state after the pitch for the target pitch angle set for the current cycle is completed, stopping the cycle; if the rotor is still in a pneumatic imbalance state until after the target pitch angle of blade b1 is set to all values in the first row in sequence, then the pitch angle of blade b2 is started to be adjusted, specifically, the target pitch angles of blades b1 and b3 are continuously set to the optimal pitch angle, and the target pitch angle of blade b2 is set to the value in the second row in sequence in equation (1), for example, the target pitch angle of blade b2 is set to the first value in the second row first, the target pitch angles of blades b1 and b3 are set to the optimal pitch angle, if the rotor is still in a pneumatic imbalance state after the pitch of the target pitch angle set for the present cycle is completed, then the target pitch angle of blade b2 is set to the next value in the second row again, the target pitch angles of blades b1 and b3 are kept unchanged, and if the rotor is in a pneumatic balance state after the pitch of the target pitch set for the present cycle is completed; if the rotor is still in a pneumatic imbalance state until after the target pitch angle of blade b2 is set to all values in the second row in sequence, then the pitch angle of blade b3 is started to be adjusted, specifically, the target pitch angles of blades b1 and b2 are continuously set to the optimal pitch angle, and the target pitch angle of blade b3 is set to the value in the third row in sequence in equation (1), for example, the target pitch angle of blade b3 is set to the first value in the third row first, the target pitch angles of blades b1 and b2 are set to the optimal pitch angle, if the rotor is still in a pneumatic imbalance state after the change of the target pitch angle set for the present cycle is completed, then the target pitch angle of blade b3 is set to the next value in the third row again, and the target pitch angles of blades b1 and b2 are kept unchanged, if the rotor is in a pneumatic balance state after the change of the target pitch angle set for the present cycle is completed; if the impeller is still in a pneumatic imbalance state until after the target pitch angle of blade b3 has been set to all values in the third row in sequence, the entire cycle is ended as the maximum number of cycles is reached.
Correspondingly, the maximum number of cyclesAs an example, the aerodynamic unbalance corresponding to each cycle may be represented by formula (2), wherein +.>Element gamma in formula (2) i,j Indicating the aerodynamic unbalance of the ith blade after the jth adjustment of the target pitch angle, in fact, the elements in the matrix on the right in equation (2) are in one-to-one correspondence with the elements in the matrix on the right in equation (1), e.g., γ 1,1 To set the target pitch angle of blade b1 to the first value in the first row, the target pitch angles of blades b2 and b3 are set to the optimal pitch angle, the aerodynamic imbalance after the pitch for the set target pitch angle is completed.
As an example, when the maximum number of cycles has been reached but the impeller has not yet been in a pneumatic equilibrium state, the target pitch angle set to minimize the impeller pneumatic imbalance throughout the cycle may be determined; and pitching the blades to a determined target pitch angle to bring the impeller closest to the aerodynamic equilibrium state. Specifically, each blade is individually pitched to a corresponding target pitch angle set to minimize the aerodynamic imbalance of the impeller.
In other words, when the impeller is still not in the pneumatic balance state after the whole cycle process is completed by traversing the pitch angle optimizing range, the target pitch angle set when the pneumatic unbalance of the impeller is minimized in the whole cycle process is taken as the target pitch angle capable of enabling the impeller to be closest to the pneumatic balance state.
It should be appreciated that the degree of impeller aerodynamic imbalance can indicate the degree of impeller aerodynamic imbalance, the more severe the impeller aerodynamic imbalance, the greater the impeller aerodynamic imbalance.
As an example, the method of correcting an impeller aerodynamic imbalance according to an exemplary embodiment of the present invention may further include: for each blade, the difference between the target pitch angle set for that blade for that cycle (i.e., the last cycle) and the preset optimal pitch angle (i.e., the actual pitch angle of that blade at the time of the cycle stop) is obtained as the deviation between the theoretical pitch angle value and the actual pitch angle value for that blade, respectively, when the cycle is stopped (i.e., the impeller has been straightened to be in an aerodynamic equilibrium state). When the impeller is in an aerodynamic balance state, the actual pitch angle of each blade is the optimal pitch angle.
Further, as an example, the pitch angle theoretical value of the blade may be corrected based on a deviation between the pitch angle theoretical value and the pitch angle actual value for the blade.
In fact, the target pitch angle set for the blades at the time of the cycle stop is the pitch angle to which the control system considers that the blades have been currently pitched (i.e., theoretical pitch angle, pitch angle theoretical value), but because the rotor has been in an aerodynamically balanced state at the time of the cycle stop, which means that the actual pitch angle of the blades is the optimal pitch angle, there may be a deviation between the theoretical pitch angle and the actual pitch angle at the time, and it is due to this deviation that the control system considers that the rotor has been in an aerodynamically balanced state (i.e., the control system considers that each blade has been pitched to the optimal pitch angle), but the rotor is in fact in an aerodynamically unbalanced state (i.e., the actual pitch angle of at least one blade is not the optimal pitch angle), which may be due to installation errors, pitch execution accuracy, operational environmental impact (e.g., icing, blade pollution), etc.
Accordingly, after the blade aerodynamic imbalance has been corrected, the theoretical pitch angle value of each blade may be corrected, or otherwise calibrated, based on the deviation between the theoretical pitch angle value determined for that blade and the actual pitch angle value, e.g., the current pitch angle of the blade is calibrated to the optimal pitch angle (e.g., 0 °) by the control system at the time of the cycle stop.
FIG. 2 illustrates a block diagram of an apparatus for correcting impeller aerodynamic imbalance in accordance with an exemplary embodiment of the present invention.
As shown in fig. 2, an apparatus for correcting an impeller aerodynamic unbalance according to an exemplary embodiment of the present invention includes: a state determination unit 10, an optimizing range determination unit 20, and a loop setting unit 30.
Specifically, the state determination unit 10 is configured to determine whether the impeller of the wind turbine is in an aerodynamically unbalanced state.
The optimizing range determining unit 20 is adapted to determining a pitch angle optimizing range when it is determined that the impeller is in a pneumatic unbalance state.
The circulation setting unit 30 is configured to sequentially set target pitch angles of a plurality of blades of the impeller to values within the determined pitch angle optimizing range in a circulation manner until the set target pitch angles of the plurality of blades bring the impeller to an aerodynamic balance state, where the plurality of target pitch angles set for the plurality of blades at each circulation are at least partially different from those set at the previous circulation.
As an example, the cycle setting unit 30 may set the target pitch angle of a part of the plurality of blades to a preset optimal pitch angle and set the target pitch angle of another part of the plurality of blades to a value within the pitch angle optimizing range and different from the value set at the previous cycle, each time a cycle is performed; after the completion of the pitching of the target pitch angle set for the present cycle, the state determination unit 10 may determine whether the impeller is in a pneumatic balance state, wherein the cycle setting unit 30 stops the cycle when it is determined that the impeller is in the pneumatic balance state; when it is determined that the impeller is in the pneumatic unbalance state, the cycle setting unit 30 enters the next cycle.
As an example, the cycle setting unit 30 may start a cycle after determining the pitch angle optimizing range, when it is detected that the wind turbine is in a specific operation state, sequentially setting target pitch angles of the plurality of blades of the impeller to values within the determined pitch angle optimizing range until the set target pitch angle brings the impeller to a pneumatically balanced state, and stop the cycle; the state determining unit 10 may determine whether the impeller is in a pneumatic balance state when it is detected that the wind turbine generator set is in the specific operation state after completing the pitching of the target pitch angle set for the current cycle for a preset period of time, wherein the specific operation state satisfies the following conditions: normal power generation is performed without limiting electricity, the rotating speed of the impeller reaches the rated rotating speed, and the output power does not reach the rated power.
As an example, the state determining unit 10 may determine that the impeller is in the aerodynamic unbalance state when the aerodynamic unbalance of the impeller of the wind generating set is greater than or equal to a preset impeller aerodynamic unbalance constant; the state determining unit 10 may determine that the impeller is in a pneumatic balance state when the impeller pneumatic unbalance of the wind generating set is smaller than the preset impeller pneumatic unbalance constant, wherein the impeller pneumatic unbalance of the wind generating set is: the ratio of the energy amplitude of the vibration signal of the wind generating set at the rotation frequency of one time of the impeller to the energy amplitude of the vibration signal at the rotation frequency of three times of the impeller.
As an example, the optimizing range determining unit 20 may determine the pitch angle optimizing range based on a pitch angle relative deviation angle between current blades, which is a maximum value of angles of phase difference between two of the current actual pitch angles of the plurality of blades, when it is determined that the impeller is in the aerodynamic imbalance state.
As an example, the optimizing range determining unit 20 may determine the pitch angle optimizing range as [ β - |θ|, β+|θ| ], where θ is a pitch angle relative deviation angle between current blades, and β is a preset optimal pitch angle.
As an example, the cycle setting unit 30 may determine the target pitch angle set when the impeller aerodynamic imbalance is minimized throughout the cycle when the maximum number of cycles has been reached; and pitching the blades to a determined target pitch angle to bring the impeller closest to the aerodynamic equilibrium state.
As an example, the apparatus for correcting aerodynamic unbalance of an impeller according to an exemplary embodiment of the present invention may further include: a deviation determining unit (not shown) and a correcting unit (not shown) for obtaining, for each blade, a difference between a target pitch angle set for the blade for the cycle at a stop of the cycle and a preset optimal pitch angle as a deviation between a pitch angle theoretical value and a pitch angle actual value for the blade; the correction unit is used for correcting the pitch angle theoretical value of the blade based on the deviation between the pitch angle theoretical value and the pitch angle actual value of the blade, wherein the actual pitch angle of each blade is the optimal pitch angle when the impeller is in an aerodynamic balance state.
It should be appreciated that the specific process performed by the apparatus for correcting aerodynamic unbalance of an impeller according to an exemplary embodiment of the present invention has been described in detail with reference to fig. 1, and details thereof will not be repeated herein.
It should be appreciated that the various units in the apparatus for correcting impeller aerodynamic imbalance according to an exemplary embodiment of the present invention may be implemented as hardware components and/or software components. The individual units may be implemented, for example, using a Field Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC), depending on the processing performed by the individual units as defined.
Exemplary embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, implements a method of correcting an impeller aerodynamic imbalance as described in the above exemplary embodiments. The computer readable storage medium is any data storage device that can store data which can be read by a computer system. Examples of the computer readable storage medium include: read-only memory, random access memory, compact disc read-only, magnetic tape, floppy disk, optical data storage device, and carrier waves (such as data transmission through the internet via wired or wireless transmission paths).
Fig. 3 shows a block diagram of a control device of a wind power plant according to an exemplary embodiment of the invention.
As shown in fig. 3, a control device 40 of a wind power generation set according to an exemplary embodiment of the present invention includes: the processor 50 and the memory 60, wherein the memory 60 comprises program modules 70, which when executed by the processor 50, implement the method of correcting an impeller aero-unbalance as described in the above exemplary embodiments for correcting an impeller aero-unbalance state of a current wind power generator set. As an example, the control device 40 of the wind power plant may be a main controller deployed within the wind power plant or a sub-controller interacting with the main controller. It should be appreciated that the memory 60 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. In addition, the memory 60 may also include program modules for implementing other functions of the wind turbine. Furthermore, the control device 40 of the wind turbine according to an exemplary embodiment of the present invention may further include an input/output interface 80, and the processor 50 may acquire operation data of the wind turbine through the I/O interface 80, for example, the I/O interface 80 may be connected to an acceleration sensor or the like.
Although a few exemplary embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (10)
1. A method of correcting an impeller aerodynamic imbalance, the method comprising:
determining whether an impeller of the wind generating set is in a pneumatic unbalanced state;
when the impeller is in the pneumatic unbalanced state, determining a pitch angle optimizing range based on the pitch angle relative deviation angle between the current blades, wherein the pitch angle relative deviation angle between the current blades is the maximum value of the phase difference angles between every two of the current actual pitch angles of the plurality of blades;
and sequentially setting target pitch angles of a plurality of blades of the impeller to be a value in a determined pitch angle optimizing range in a circulating manner until the set target pitch angles of the plurality of blades enable the impeller to be in an aerodynamic balance state, wherein the set target pitch angles of the plurality of blades are different from at least part of the set target pitch angles of the plurality of blades in the last circulating manner.
2. The method according to claim 1, wherein the method further comprises:
respectively aiming at each blade, acquiring a difference value between a target pitch angle set for the blade in the cycle and a preset optimal pitch angle when the cycle is stopped, and taking the difference value as a deviation between a pitch angle theoretical value and a pitch angle actual value for the blade;
based on the deviation between the theoretical pitch angle value and the actual pitch angle value for the blade, the theoretical pitch angle value of the blade is corrected,
when the impeller is in an aerodynamic balance state, the actual pitch angle of each blade is the optimal pitch angle.
3. A method according to claim 1, wherein the step of cycling sequentially setting target pitch angles of a plurality of blades of the impeller to values within a determined pitch angle optimization range until the set target pitch angles of the plurality of blades bring the impeller to an aerodynamic equilibrium state comprises:
setting the target pitch angle of one part of the blades to be a preset optimal pitch angle when each cycle is performed, and setting the target pitch angle of the other part of the blades to be a value which is in the pitch angle optimizing range and is different from the value set in the last cycle;
after the pitching of the target pitch angles of the plurality of blades set for the present cycle is completed, determining whether the impeller is in an aerodynamic balance state,
wherein, when the impeller is determined to be in a pneumatic balance state, the circulation is stopped; when the impeller is determined to be in a pneumatic imbalance state, the next cycle is entered.
4. The method of claim 3, wherein the step of,
the step of circularly setting the target pitch angles of a plurality of blades of the impeller to a value within the determined pitch angle optimizing range in turn until the set target pitch angles of the plurality of blades enable the impeller to be in a pneumatic balance state, comprises the following steps of: after the pitch angle optimizing range is determined, when the wind generating set is detected to be in a specific running state, starting to circularly and sequentially set the target pitch angles of the blades of the impeller to be a value in the determined pitch angle optimizing range until the set target pitch angles of the blades enable the impeller to be in a pneumatic balance state;
the step of determining whether the impeller is in an aerodynamic balance state after completing pitching of the target pitch angles of the plurality of blades set for the present cycle comprises: after the target pitch angles of the blades set for the current cycle are changed to reach a preset duration, determining whether the impeller is in a pneumatic balance state when the wind generating set is detected to be in the specific running state,
wherein the specific operating state satisfies the following condition: normal power generation is performed without limiting electricity, the rotating speed of the impeller reaches the rated rotating speed, and the output power does not reach the rated power.
5. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the step of determining whether the impeller of the wind generating set is in a pneumatically unbalanced state comprises: when the impeller pneumatic unbalance degree of the wind generating set is larger than or equal to a preset impeller pneumatic unbalance degree constant, determining that the impeller is in a pneumatic unbalance state;
in the step of circularly and sequentially setting the target pitch angles of a plurality of blades of the impeller to be a value in a determined pitch angle optimizing range until the set target pitch angles of the plurality of blades enable the impeller to be in a pneumatic balance state, when the impeller pneumatic unbalance degree of the wind generating set is smaller than the preset impeller pneumatic unbalance degree constant, determining that the impeller is in the pneumatic balance state,
wherein, the impeller pneumatic unbalance degree of wind generating set is: the ratio of the energy amplitude of the vibration signal of the wind generating set at the rotation frequency of one time of the impeller to the energy amplitude of the vibration signal at the rotation frequency of three times of the impeller.
6. A method according to claim 1, wherein the step of determining the pitch angle optimization range based on the relative deviation angle of the pitch angles between the current blades comprises:
determining the pitch angle optimizing range，
Wherein θ is the relative deviation angle of the pitch angle between the current blades,is the preset optimal pitch angle.
7. The method of claim 5, wherein the method further comprises:
determining a target pitch angle of the plurality of blades set to minimize the aerodynamic imbalance of the impeller throughout the cycle when the maximum number of cycles has been reached;
the blades are pitched to a determined target pitch angle to bring the impeller closest to the aerodynamic equilibrium state.
8. A device for correcting impeller aerodynamic imbalance, the device comprising:
the state determining unit is used for determining whether the impeller of the wind generating set is in a pneumatic unbalanced state or not;
the optimizing range determining unit is used for determining a pitch angle optimizing range based on the relative deviation angle of the pitch angles among the current blades when the impeller is determined to be in a pneumatic unbalanced state, wherein the relative deviation angle of the pitch angles among the current blades is the maximum value of the phase difference angle among the current actual pitch angles of the plurality of blades;
and the circulation setting unit is used for sequentially setting the target pitch angles of the plurality of blades of the impeller to be a value in the determined pitch angle optimizing range in a circulation mode until the set target pitch angles of the plurality of blades enable the impeller to be in an aerodynamic balance state, wherein the target pitch angles of the plurality of blades are different from at least part of the set target pitch angles of the plurality of blades in the last circulation.
9. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements a method of correcting an impeller aerodynamic imbalance according to any one of claims 1 to 7.
10. A control device for a wind power generator set, the control device comprising:
a processor;
a memory storing a computer program which, when executed by a processor, implements a method of correcting an impeller aerodynamic imbalance as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911324459.6A CN113007034B (en) | 2019-12-20 | 2019-12-20 | Method and device for correcting pneumatic unbalance of impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911324459.6A CN113007034B (en) | 2019-12-20 | 2019-12-20 | Method and device for correcting pneumatic unbalance of impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113007034A CN113007034A (en) | 2021-06-22 |
| CN113007034B true CN113007034B (en) | 2024-04-12 |
Family
ID=76381939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911324459.6A Active CN113007034B (en) | 2019-12-20 | 2019-12-20 | Method and device for correcting pneumatic unbalance of impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113007034B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835881A (en) * | 2014-03-05 | 2014-06-04 | 沈阳华创风能有限公司 | Electric and effective damping based independent paddle switching system and method |
| CA2983208A1 (en) * | 2015-04-23 | 2016-10-27 | Envision Energy (Denmark) Aps | Method of correcting rotor imbalance and wind turbine thereof |
| CN106545468A (en) * | 2016-10-09 | 2017-03-29 | 上海交通大学 | A kind of propeller pitch angle self-optimization method and system of MW class wind turbine group |
| CN106704102A (en) * | 2016-12-29 | 2017-05-24 | 北京金风科创风电设备有限公司 | Method and system for determining blade balance condition of wind generating set |
| CN107781107A (en) * | 2016-08-31 | 2018-03-09 | 新疆金风科技股份有限公司 | The optimal propeller pitch angle adaptive-optimum control method, apparatus of Wind turbines and equipment |
| CN108518305A (en) * | 2018-03-27 | 2018-09-11 | 沈阳工业大学自控技术有限公司 | A kind of Wind turbines control method and system |
| CN108644069A (en) * | 2018-04-27 | 2018-10-12 | 三重能有限公司 | Blade unbalance detection and device |
| CN108708822A (en) * | 2018-04-28 | 2018-10-26 | 山东中车风电有限公司 | A kind of wind generating set pitch control self-adaptation control method and system |
| CN110118152A (en) * | 2019-06-14 | 2019-08-13 | 三一重能有限公司 | Wind generator set blade air-balance monitors adjustment system and monitoring method of adjustment |
| CN110259637A (en) * | 2019-06-25 | 2019-09-20 | 中国船舶重工集团海装风电股份有限公司 | Blade aerodynamic imbalance antidote, device and the equipment of wind power generating set |
| CN110307121A (en) * | 2019-06-27 | 2019-10-08 | 湘电风能有限公司 | A kind of wind generator set blade vane angle optimization method |
-
2019
- 2019-12-20 CN CN201911324459.6A patent/CN113007034B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103835881A (en) * | 2014-03-05 | 2014-06-04 | 沈阳华创风能有限公司 | Electric and effective damping based independent paddle switching system and method |
| CA2983208A1 (en) * | 2015-04-23 | 2016-10-27 | Envision Energy (Denmark) Aps | Method of correcting rotor imbalance and wind turbine thereof |
| CN107781107A (en) * | 2016-08-31 | 2018-03-09 | 新疆金风科技股份有限公司 | The optimal propeller pitch angle adaptive-optimum control method, apparatus of Wind turbines and equipment |
| CN106545468A (en) * | 2016-10-09 | 2017-03-29 | 上海交通大学 | A kind of propeller pitch angle self-optimization method and system of MW class wind turbine group |
| CN106704102A (en) * | 2016-12-29 | 2017-05-24 | 北京金风科创风电设备有限公司 | Method and system for determining blade balance condition of wind generating set |
| CN108518305A (en) * | 2018-03-27 | 2018-09-11 | 沈阳工业大学自控技术有限公司 | A kind of Wind turbines control method and system |
| CN108644069A (en) * | 2018-04-27 | 2018-10-12 | 三重能有限公司 | Blade unbalance detection and device |
| CN108708822A (en) * | 2018-04-28 | 2018-10-26 | 山东中车风电有限公司 | A kind of wind generating set pitch control self-adaptation control method and system |
| CN110118152A (en) * | 2019-06-14 | 2019-08-13 | 三一重能有限公司 | Wind generator set blade air-balance monitors adjustment system and monitoring method of adjustment |
| CN110259637A (en) * | 2019-06-25 | 2019-09-20 | 中国船舶重工集团海装风电股份有限公司 | Blade aerodynamic imbalance antidote, device and the equipment of wind power generating set |
| CN110307121A (en) * | 2019-06-27 | 2019-10-08 | 湘电风能有限公司 | A kind of wind generator set blade vane angle optimization method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113007034A (en) | 2021-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10907615B2 (en) | Method of correcting rotor imbalance and wind turbine thereof | |
| CN101586527B (en) | Method and apparatus for damping tower oscillation in a wind turbine | |
| US20120183399A1 (en) | Method and apparatus for balancing wind turbines | |
| US8979492B2 (en) | Methods and systems for determining a pitch angle offset signal and for controlling a rotor frequency of a rotor of a wind turbine for speed avoidance control | |
| CA2755154C (en) | Method and system for adjusting a power parameter of a wind turbine | |
| US10253758B2 (en) | System and method for optimizing wind farm performance | |
| CN108644069B (en) | Blade unbalance detection method and device | |
| US20170285066A1 (en) | Method and arrangement for performing a wind direction measurement | |
| CN107709763A (en) | Prevent the situation of wind turbine misalignment | |
| WO2022001250A1 (en) | Wind turbine generator system, and rotation speed avoidance control method and apparatus therefor | |
| CN111712631B (en) | Tower damping in wind turbine power production | |
| CN112555101B (en) | Method and device for identifying impeller aerodynamic state of wind generating set | |
| CN113007034B (en) | Method and device for correcting pneumatic unbalance of impeller | |
| WO2022001252A1 (en) | Wind turbine generator, and minimum rotational speed control method and device therefor | |
| CN114689237B (en) | Load sensor calibration method and device and computer readable storage medium | |
| CN112555102B (en) | Method and device for identifying blade pitch angle deviation and controlling wind generating set | |
| CN111120203B (en) | Method and equipment for determining yaw wind deviation angle of wind generating set | |
| US20230175484A1 (en) | Load reduction control method for wind turbine generator and device | |
| US20230213018A1 (en) | Wind turbine generator system, and rotation speed avoidance control method and apparatus therefor | |
| CN113738594B (en) | Wind direction deviation diagnosis system and method for wind generating set | |
| CN114251222B (en) | Wind energy capturing method and device of wind generating set | |
| US20200325876A1 (en) | Wind turbine group power generation amount evaluation device, wind turbine group power generation amount evaluation method, and program | |
| CN113123926B (en) | Variable pitch control method and system of wind generating set | |
| CN115126654A (en) | Collaborative optimization method and system for power generation performance of wind turbine generator | |
| EP4341553A1 (en) | Individual pitch control with unavailable blade load sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 830026 No. 107, Shanghai Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region Applicant after: Jinfeng Technology Co.,Ltd. Address before: 830026 No. 107, Shanghai Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region Applicant before: XINJIANG GOLDWIND SCIENCE & TECHNOLOGY Co.,Ltd. |
|
| GR01 | Patent grant |