CN116696668A - Vibration control method and related device of wind driven generator - Google Patents
Vibration control method and related device of wind driven generator Download PDFInfo
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- CN116696668A CN116696668A CN202210192027.XA CN202210192027A CN116696668A CN 116696668 A CN116696668 A CN 116696668A CN 202210192027 A CN202210192027 A CN 202210192027A CN 116696668 A CN116696668 A CN 116696668A
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- 238000010248 power generation Methods 0.000 claims description 12
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0276—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F03D7/0296—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor to prevent, counteract or reduce noise emissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/06—Controlling wind motors the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Sustainable Development (AREA)
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The embodiment of the application discloses a vibration control method and a related device of a wind driven generator, wherein in a target rotating speed stage, such as a cut-in rotating speed stage or a rated rotating speed stage, which is easy to influence the service life of the wind driven generator, a second rotating speed different from the first rotating speed is determined according to the target rotating speed stage and the first rotating speed of the target rotating speed stage. When the target rotational speeds of the blades of the wind turbine are in the rotational speed range identified by the first rotational speed and the second rotational speed, a target torque corresponding to the target rotational speed may be determined based on a torque rotational speed matching relationship that optimizes the generated power. The corresponding torque can be dynamically determined based on the actual rotation speed of the blade in the rotation speed range and is used as a basis for adjusting the torque of the generator of the wind driven generator, so that the rotation speed in the target rotation speed stage is not constant any more, but gradually changes under the control of the torque, excitation vibration brought by rotation of the blade to the wind driven generator is not stable for a long time, the resonance degree of the tower is avoided, and the load of the tower is reduced.
Description
Technical Field
The application relates to the field of data processing, in particular to a vibration control method and a related device of a wind driven generator.
Background
Wind power generation is a process of converting kinetic energy of wind into electric energy through a wind power generator. The blades of the wind driven generator drive the generator to generate electricity under the drive of wind power.
In the power generation process, the wind driven generator has two rotational speed stages, namely a cut-in rotational speed stage and a rated rotational speed stage. The cut-in rotational speed stage is a stage in which the rotational speed of the blade has just cut into grid connection, and the rated rotational speed stage is a stage in which the rotational speed of the blade reaches the rated rotational speed of the wind driven generator. As shown in fig. 1, the horizontal axis is Rotor speed (Rotor speed) for identifying the rotational speed of the blades, and the vertical axis is Generator torque (Generator torque). The cut-in speed phase is the portion identified by a-B in fig. 1 and the rated speed phase is the portion identified by C-D in fig. 1. In the related art, with an increase in wind speed, the rotor speed is controlled to be constant by increasing the generator torque in these two stages, so as to increase the generated power.
However, in the constant rotation speed control method of the related art, the vibration of the wind driven generator in the two stages can cause the increase of the tower load, and the service life of the wind driven generator is easily affected.
Disclosure of Invention
In order to solve the technical problems, the application provides a vibration control method and a related device of a wind driven generator, so that the rotating speed of the wind driven generator at a target rotating speed stage is no longer constant, the degree of tower resonance is avoided, and the tower load is reduced.
The embodiment of the application discloses the following technical scheme:
in one aspect, an embodiment of the present application provides a vibration control method for a wind turbine, where the method includes:
determining a second rotating speed to be adjusted according to a target rotating speed stage related to the wind driven generator and a first rotating speed of the target rotating speed stage, wherein the target rotating speed stage comprises a cut-in rotating speed stage or a rated rotating speed stage, and the first rotating speed is different from the second rotating speed;
when the target rotating speed of the blades of the wind driven generator is in a rotating speed range marked by the first rotating speed and the second rotating speed, determining a target torque corresponding to the target rotating speed according to a torque rotating speed matching relation based on optimized power generation;
and adjusting the generator torque of the wind driven generator to the target torque.
In another aspect, an embodiment of the present application provides a vibration control apparatus for a wind turbine, including a first determining unit, a second determining unit, and an adjusting unit:
the first determining unit is configured to determine a second rotation speed to be adjusted according to a target rotation speed stage related to the wind turbine and a first rotation speed of the target rotation speed stage, where the target rotation speed stage includes a cut-in rotation speed stage or a rated rotation speed stage, and the first rotation speed is different from the second rotation speed;
the second determining unit is used for determining a target torque corresponding to the target rotating speed according to a torque rotating speed matching relation based on optimized power generation when the target rotating speed of the blade of the wind driven generator is in a rotating speed range marked by the first rotating speed and the second rotating speed;
the adjusting unit is used for adjusting the generator torque of the wind driven generator to the target torque.
In yet another aspect, an embodiment of the present application provides a computer device including a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to perform the method of the above aspect according to instructions in the program code.
In yet another aspect, embodiments of the present application provide a computer-readable storage medium for storing a computer program for performing the method described in the above aspect.
According to the technical scheme, in a target rotating speed stage, such as a cut-in rotating speed stage or a rated rotating speed stage, which is easy to influence the service life of the wind driven generator, a second rotating speed different from the first rotating speed is determined according to the target rotating speed stage and the first rotating speed of the target rotating speed stage. When the target rotational speeds of the blades of the wind turbine are in the rotational speed range identified by the first rotational speed and the second rotational speed, a target torque corresponding to the target rotational speed may be determined based on a torque rotational speed matching relationship that optimizes the generated power. The corresponding torque can be dynamically determined based on the actual rotation speed of the blade in the rotation speed range and is used as a basis for adjusting the torque of the generator of the wind driven generator, so that the rotation speed at the target rotation speed stage is not constant any more, but gradually changes under the control of the torque, excitation vibration brought by rotation of the blade to the wind driven generator is not stable for a long time, the resonance degree of the tower is avoided, and the load of the tower is reduced.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a rotational speed torque relationship of a rotational speed control method of a wind turbine generator system;
FIG. 2 is a flow chart of a method for controlling vibration of a wind turbine according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a rotational speed and torque relationship of a vibration control method of a wind turbine according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a method for determining a second rotational speed based on a tower vibration acceleration according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a rotational speed and torque relationship of a vibration control method of a wind turbine according to an embodiment of the present application;
fig. 6 is a device structure diagram of a vibration control device of a wind driven generator according to an embodiment of the present application.
Detailed Description
In order to make the present application better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The rotational speed torque relationship of a rotational speed control method for a wind turbine is shown in FIG. 1, wherein A-B identifies the cut-in rotational speed phase of the wind turbine and C-D identifies the rated rotational speed phase of the wind turbine. It can be seen that in the target rotational speed stage of the wind power generator operation, the target rotational speed stage includes a cut-in rotational speed stage and a rated rotational speed stage, and with an increase in wind speed, a constant rotational speed control is achieved by increasing the generator torque in the target rotational speed stage to increase the generated power. However, there is inevitably a tower shadow effect between the blades and the tower of the wind turbine and an anti-tower shadow effect, so that the tower vibration of the wind turbine occurs. The tower shadow effect is a negative effect of the wind driven generator in the power generation process, and particularly refers to the phenomenon that when wind flows through a tower, a flow field changes, and air flows through blades are disturbed to form the tower shadow effect; since the forces are mutually, there is also a corresponding anti-tower effect.
If the control based on the constant rotation speed is adopted in the target rotation speed stage, the rotation speed frequency is constant, meanwhile, the excitation frequency of the tower caused by the tower shadow effect and the anti-tower shadow effect is also constant, namely, the excitation vibration of the wind driven generator caused by the rotation of the blades is stable excitation in the target rotation speed stage, so that the tower resonance is easy to occur, and the tower load is increased.
Therefore, the embodiment of the application provides a vibration control method of a wind driven generator, so that the rotating speed of the wind driven generator in a target rotating speed stage is not constant any more, the degree of tower resonance is avoided, and the tower load is reduced.
The following examples are provided to illustrate the application:
fig. 2 is a flowchart of a method for controlling vibration of a wind turbine according to an embodiment of the present application, where the method includes:
s201: and determining a second rotating speed to be adjusted according to the target rotating speed stage related to the wind driven generator and the first rotating speed of the target rotating speed stage.
Wherein the target rotational speed phase comprises a plunge rotational speed phase or a rated rotational speed phase, the first rotational speed being different from the second rotational speed.
In the wind power generation process, the target rotating speed stage related to the wind power generator comprises a cut-in rotating speed stage or a rated rotating speed stage, wherein the cut-in rotating speed stage is a stage that the rotating speed of the blades of the wind power generator is just cut into grid connection, and the rated rotating speed stage is a stage that the rotating speed of the blades of the wind power generator reaches the rated rotating speed of the wind power generator.
When the wind power generator is involved in the target rotational speed stage, a second rotational speed to be adjusted is determined based on the target rotational speed stage and the first rotational speed of the currently involved target rotational speed stage. The determined second rotational speed is different from the first rotational speed, so that rotational speed change control of the wind driven generator in the currently involved target rotational speed stage is realized based on the first rotational speed and the second rotational speed, namely, the first rotational speed and the second rotational speed identify a rotational speed range corresponding to the wind driven generator in the target rotational speed stage.
In theory, the cut-in rotational speed phase of the wind turbine is before the rated rotational speed phase, i.e. immediately after the blade rotational speed of the wind turbine has been cut into grid, the rotational speed increase of which eventually reaches the rated rotational speed phase, so in one possible implementation, if the target rotational speed phase comprises the cut-in rotational speed phase, the first rotational speed is determined as the starting rotational speed of the rotational speed range, the second rotational speed is determined as the ending rotational speed of the rotational speed range, which is greater than the first rotational speed.
As shown in fig. 3, a schematic diagram of a rotational speed-torque relationship of a vibration control method of a wind turbine according to an embodiment of the present application may be used to identify a situation that a target rotational speed stage includes a cut-in rotational speed stage by using a-B, that is, a point a is a start point of the cut-in rotational speed stage, and represents cut-in grid connection, and then a rotational speed of a blade of the wind turbine at the point a is a first rotational speed; the point B is the end point of the cut-in rotational speed stage, and the rotational speed of the blades of the wind driven generator at the point B is the second rotational speed.
In one possible implementation, if the target rotational speed phase includes the cut-in rotational speed phase, the first rotational speed may be a cut-in rotational speed of the wind turbine, where the cut-in rotational speed is determined for the current wind turbine based on a cut-in grid-tie requirement. For example, for a certain determined model (parameters such as frequency conversion of the wind driven generator, etc.), the first rotating speed is determined to be 7.5rpm based on the cut-in grid-connection requirement.
The rated rotation speed is a parameter selected during the production of the wind driven generator, and when the rotation speed of the blades of the wind driven generator reaches the rated rotation speed, the rotation speed of the wind driven generator needs to be controlled not to be increased any more in order to ensure the normal use of the wind driven generator. It can be seen that theoretically, the nominal rotational speed should be the upper limit value of the rotational speed of the blades of the wind power generator, so in one possible implementation, if the target rotational speed phase comprises the nominal rotational speed phase, the second rotational speed is determined as the starting rotational speed of the rotational speed range, the first rotational speed is determined as the ending rotational speed of the rotational speed range, and the second rotational speed is smaller than the first rotational speed.
In one possible implementation, if the target rotational speed phase includes the rated rotational speed phase, the first rotational speed may be a rated rotational speed of the wind turbine, the rated rotational speed being selected based on a production design for the current wind turbine. For example, for a certain model, the first rotation speed is determined to be 14rpm at the current rotation frequency.
Since the wind turbine blades at different rotational speeds, the excitation vibrations imparted to the wind turbine due to the presence of the tower shadow effect are different, which excitation vibrations cause the wind turbine tower to vibrate, since the rotational speed of the wind turbine blades and the vibrations imparted to the tower at this rotational speed are somewhat related, in one possible implementation, S201 comprises:
according to the first rotating speed of the target rotating speed stage, determining an acceleration parameter of a rotating speed interval in which the first rotating speed is positioned, wherein the acceleration parameter is used for identifying vibration acceleration of a tower of the wind driven generator at different rotating speeds;
and determining the second rotating speed based on the value of the vibration acceleration corresponding to the acceleration parameter.
The rotational speed of the blades of the wind power generator is somewhat related to the vibrations imparted to the tower at this rotational speed, e.g. at a certain rotational speed, the vibrations imparted to the tower are severe due to tower resonance occurring, and correspondingly the vibrations acceleration of the tower is large at this rotational speed. It is thus possible to determine the second rotational speed to be adjusted based on the vibration situation of the tower in order to control the wind turbine based on the first rotational speed and the second rotational speed, avoiding the extent of tower resonance.
Specifically, based on the first rotating speed of the currently related target rotating speed stage, determining an acceleration parameter of a rotating speed interval in which the first rotating speed is positioned, wherein the acceleration parameter is used for identifying the vibration acceleration of the tower in the rotating speed interval, and further, based on the value of the vibration acceleration corresponding to the determined acceleration parameter, determining the second rotating speed.
Fig. 4 shows a method for determining a second rotational speed based on a tower vibration acceleration, in one possible implementation, the acceleration parameter may be a vibration amplitude of the tower in a front-rear direction over a rotational speed interval in which the first rotational speed is located. As shown in fig. 4, in the rotation speed interval 7.5-8.5rpm where the first rotation speed (cut-in rotation speed) is 7.5rpm, the vibration amplitude of the tower is greater than the rotation speed interval (e.g., 9-11 rpm) where the vibration amplitude of the tower is higher, and the trend that the vibration amplitude of the tower decreases with the increase of the rotation speed is exhibited, so that the second rotation speed can be determined according to the change condition of the vibration amplitude of the tower.
Since vibrations due to the natural frequency are inevitably present during actual operation of the wind power generator, in one possible implementation, the second rotational speed may be determined based on a preset threshold value when the amplitude of the vibrations of the tower is reduced to the preset threshold value. The preset threshold value of the vibration amplitude of the tower can be determined based on the natural frequency of the wind driven generator. As shown in the marked area of fig. 4, the second rotational speed was determined to be about 8.5rpm based on the above-described manner.
From the above, it is known that the first rotational speed corresponds to the target rotational speed stage currently involved, that is, different first rotational speeds correspond to different target rotational speed stages, and the second rotational speed is determined according to the target rotational speed stage and the first rotational speed involved by the wind turbine, whereby rotational speed variation control for the wind turbine in the target rotational speed stage currently involved can be achieved based on the first rotational speed and the second rotational speed.
S202: and when the target rotating speed of the blades of the wind driven generator is in a rotating speed range marked by the first rotating speed and the second rotating speed, determining a target torque corresponding to the target rotating speed according to a torque rotating speed matching relation based on optimized power generation.
S203: and adjusting the generator torque of the wind driven generator to the target torque.
In the running process of the wind driven generator, if the target rotation speed of the blade is in the rotation speed range marked by the first rotation speed and the second rotation speed, the actual rotation speed of the blade needs to be controlled to be changed from the current rotation speed to the target rotation speed, specifically, the target torque corresponding to the target rotation speed can be determined based on the torque rotation speed matching relation of the optimized power generation, and the generator torque of the wind driven generator is further adjusted to be the target torque. In this rotation speed range, the corresponding generator torque can be dynamically determined based on the actual rotation speed of the blade, and the control based on the generator torque can be realized to realize the control of the change of the rotation speed of the blade from the current rotation speed to the target rotation speed according to the determined generator torque as the basis of the generator torque adjustment control.
Based on the relationship between the blade speed of the wind power generator and the generator torque, in one possible implementation, the torque speed matching relationship is expressed by the following formula:
T＝Kopt*w 2
where T is generator torque, kopt is a gain factor, and w is blade speed.
In one possible implementation manner, when the wind driven generator is in a target rotation speed stage, firstly determining a starting point and an ending point of the current target rotation speed stage, and determining a blade rotation speed and a generator torque of the wind driven generator at the starting point and a blade rotation speed and a generator torque of the wind driven generator at the ending point according to the current target rotation speed stage, the first rotation speed and the second rotation speed; further, for any one target rotational speed value within the rotational speed range, determining a corresponding target torque value by utilizing a torque matching relation, and adjusting the generator torque of the wind driven generator to the target torque.
In one possible implementation manner, when the target rotation speed stage is a cut-in rotation speed stage of the wind driven generator, referring to an a-B segment region shown in fig. 3, the point a is used as a starting point of the cut-in rotation speed stage, and represents cut-in grid connection, the rotation speed of the point a is the first rotation speed, and the generator torque corresponding to the starting point is set to 0; and B point is used as an ending point of the cut-in rotating speed stage, the corresponding generator torque is set according to the torque rotating speed matching relation, specifically, the gain coefficient Kopt is a fixed value, and w is the rotating speed angular speed of the wind driven generator blade when the B point is used.
In one possible implementation manner, the value of w may be set according to the actual application situation of the wind power generator. For example, the value of the rotational speed angular velocity w of the wind turbine blade at the end point of the cut-in rotational speed stage can be determined according to the design parameters of the wind turbine such as the current rotational frequency and the like and the environmental parameters such as the wind speed and the like during operation.
For wind generators with higher rotational frequency, such as wind generators with rotational speeds of 3p, 6p, 9p, etc., the vibration caused by excitation may be more severe, so in one possible implementation, in the vibration control of the wind generator with higher rotational frequency, the start point and the end point of the target rotational speed stage may be set further, i.e. a more sufficient control change space is given to the target rotational speed stage. Specifically, the method can be set according to the actual application condition of the wind power generator. For example, for a wind driven generator vibrating at a rotation speed of 3p, the rotation speed difference between the starting point and the ending point of the target rotation speed stage is about 0.3-1.0rpm, and the value of w can be set according to the specific application situation of the wind driven generator.
And determining the value of the target torque corresponding to the target rotating speed by a linear interpolation mode based on the rotating speed of the blade and the torque of the generator at the starting point A and the rotating speed of the blade and the torque of the generator at the ending point B of the wind driven generator aiming at any target rotating speed value of the wind driven generator in the rotating speed interval marked by the A-B.
In one possible implementation manner, a torque difference between the torque value at the point B and the torque value at the point a is calculated, a rotational speed difference between the rotational speed value at the point B and the rotational speed value at the point a is calculated, a torque change rate or a rotational speed change rate in the a-B interval is determined according to the torque difference and the rotational speed difference, and further, for each target rotational speed in the rotational speed interval identified by the a-B, a value of a target torque corresponding to the target rotational speed is determined according to the torque change rate or the rotational speed change rate, and the rotational speed of the blade at the point a or the point B and the torque of the generator. Such as: for the current wind driven generator, the first rotation speed at the starting point A is equal to 7.5rpm of the cut-in rotation speed and the generator torque is 0kNm, the second rotation speed at the ending point B is equal to 8.5rpm and the generator torque is about 400kNm, and the torque change rate in the A-B interval is calculated to be 400kNm/rpm; taking a point in the a-B interval where the rotational speed is 8rpm, the generator torque at that point is calculated to be 200kNm.
The above-mentioned torque change rate refers to a change rate of torque with respect to a change in rotational speed, and correspondingly, the above-mentioned rotational speed change rate refers to a change rate of rotational speed with respect to torque, and is not a change rate of torque or rotational speed with respect to time.
Therefore, corresponding torque can be dynamically determined based on the actual rotation speed of the blade in the rotation speed range marked by the first rotation speed and the second rotation speed and is used as a basis for adjusting the torque of the generator of the wind driven generator, so that the rotation speed at the target rotation speed stage is not constant any more, but gradually changes under the control of the torque, excitation vibration brought by rotation of the blade to the wind driven generator is not stable for a long time, the degree of tower resonance is avoided, and the tower load is reduced.
Considering that the operation of the wind power generator is affected differently by the wind speed or the generator torque as the rotational speed of the blades of the wind power generator increases, in one possible implementation, the a-B segment may be further divided into a first sub-phase and a second sub-phase based on the value of the rotational speed, where the control is performed at different torque change rates or rotational speed change rates. For example, in a first sub-phase near the start point a, control may be performed at a smaller rate of torque change or rate of speed change than in a second sub-phase. It should be noted that, in the target rotation speed stage, a control mode of constant change rate or a control scheme that the change rate changes with the control process is adopted, and the application is not limited in any way.
It should be noted that the specific control method for the section a-B is only used as an example, so that it is convenient to understand the control process of the vibration control method for the wind driven generator provided by the application. In addition to the cut-in rotational speed phase of the wind turbine at A-B, the control may also be performed in the manner described above for the rated rotational speed phase, such as C-D shown in FIG. 3, with reference to J-D shown in FIG. 5. Therefore, the rotating speed of the wind driven generator at the rated rotating speed stage is not constant, but gradually changes under the control of torque, excitation vibration brought by the rotation of the blades to the wind driven generator cannot be stable for a long time, the degree of tower resonance is avoided, and the tower load is reduced.
Different wind driven generators have rotating speed intervals with different lengths, and the larger the rotating speed interval span of the wind driven generator (or the longer the rotating speed interval is), the better the power generation performance of the wind driven generator is. However, the larger the span of the rotation speed interval of the wind driven generator, there may be some rotation speed interval causing resonance of the tower, and this type of rotation speed interval is defined as a resonance rotation speed interval, in order to avoid causing resonance of the tower, the rotation speed of the blades of the wind driven generator needs to be controlled so as not to operate in the resonance rotation speed interval, so in one possible implementation, the target rotation speed stage further includes a jump rotation speed stage, where the jump rotation speed stage is a rotation speed stage adjacent to the non-working rotation speed range of the wind driven generator; the non-working rotating speed range of the wind driven generator is used for identifying the resonance rotating speed interval.
Since the jump rotational speed phase is a rotational speed phase adjacent to a non-operational rotational speed range of the wind turbine, in one possible implementation, if a first rotational speed of the jump rotational speed phase is before the non-operational rotational speed range, determining the second rotational speed as a starting rotational speed of the rotational speed range, determining the first rotational speed as an ending rotational speed of the rotational speed range, the second rotational speed being smaller than the first rotational speed; and if the first rotating speed of the jump rotating speed stage is in the non-working rotating speed range, determining the first rotating speed as the starting rotating speed of the rotating speed range, and determining the second rotating speed as the ending rotating speed of the rotating speed range, wherein the second rotating speed is larger than the first rotating speed.
Fig. 5 is a schematic diagram of a rotational speed-torque relationship of a vibration control method of a wind turbine according to an embodiment of the present application, where D-E identifies a non-operating rotational speed range of the wind turbine. When the first rotational speed of the jump rotational speed stage is in front of the non-working rotational speed range, as shown in C-D of FIG. 5, determining the first rotational speed as the ending rotational speed of the stage, determining the second rotational speed smaller than the first rotational speed as the starting rotational speed of the stage, and further controlling according to the rotational speed torque relation of J-D identified by the starting rotational speed and the ending rotational speed; when the first rotational speed of the jump rotational speed stage is within the non-operating rotational speed range, as shown by E-F of fig. 5, the first rotational speed is determined as the start rotational speed of the stage, and the second rotational speed, which is greater than the first rotational speed, is determined as the end rotational speed of the stage, and further control is performed according to the rotational speed torque relationship of E-K identified by the start rotational speed and the end rotational speed.
It will be appreciated that the above method for controlling vibration of a wind turbine having a jump rotational speed phase substantially corresponds to the method embodiment described above, so that reference may be made to the description of the foregoing embodiment for relevant points.
It follows that in a target rotational speed phase, such as a cut-in rotational speed phase or a rated rotational speed phase, which is liable to affect the service life of the wind turbine, a second rotational speed different from the first rotational speed is determined from the target rotational speed phase and the first rotational speed of the target rotational speed phase. When the target rotational speeds of the blades of the wind turbine are in the rotational speed range identified by the first rotational speed and the second rotational speed, a target torque corresponding to the target rotational speed may be determined based on a torque rotational speed matching relationship that optimizes the generated power. The corresponding torque can be dynamically determined based on the actual rotation speed of the blade in the rotation speed range and is used as a basis for adjusting the torque of the generator of the wind driven generator, so that the rotation speed at the target rotation speed stage is not constant any more, but gradually changes under the control of the torque, excitation vibration brought by rotation of the blade to the wind driven generator is not stable for a long time, the resonance degree of the tower is avoided, and the load of the tower is reduced.
Fig. 6 is a device structure diagram of a vibration control device of a wind turbine according to an embodiment of the present application, where the device includes a first determining unit 601, a second determining unit 602, and an adjusting unit 603:
the first determining unit 601 is configured to determine a second rotation speed to be adjusted according to a target rotation speed stage related to the wind turbine and a first rotation speed of the target rotation speed stage, where the target rotation speed stage includes a cut-in rotation speed stage or a rated rotation speed stage, and the first rotation speed is different from the second rotation speed;
the second determining unit 602 is configured to determine, when a target rotational speed of a blade of the wind turbine is in a rotational speed range identified by the first rotational speed and the second rotational speed, a target torque corresponding to the target rotational speed according to a torque rotational speed matching relationship based on optimized power generation;
the adjusting unit 603 is configured to adjust a generator torque of the wind turbine to the target torque.
In a possible implementation manner, the apparatus further includes a third determining unit:
the third determining unit is configured to determine, if the target rotation speed stage includes the cut-in rotation speed stage, the first rotation speed as a start rotation speed of the rotation speed range, and determine the second rotation speed as an end rotation speed of the rotation speed range, where the second rotation speed is greater than the first rotation speed;
the third determining unit is further configured to determine the second rotation speed as a start rotation speed of the rotation speed range, determine the first rotation speed as an end rotation speed of the rotation speed range, and determine the second rotation speed as an end rotation speed of the rotation speed range if the target rotation speed stage includes the rated rotation speed stage, where the second rotation speed is smaller than the first rotation speed.
In a possible implementation manner, the first determining unit is further configured to determine, according to a first rotation speed of the target rotation speed stage, an acceleration parameter of a rotation speed interval in which the first rotation speed is located, where the acceleration parameter is used to identify vibration acceleration of a tower of the wind turbine at different rotation speeds;
and determining the second rotating speed based on the value of the vibration acceleration corresponding to the acceleration parameter.
In a possible implementation manner, the target rotational speed stage further includes a jump rotational speed stage, where the jump rotational speed stage is a rotational speed stage adjacent to a non-operating rotational speed range of the wind turbine, and if a first rotational speed of the jump rotational speed stage is before the non-operating rotational speed range, the third determining unit is further configured to determine the second rotational speed as a start rotational speed of the rotational speed range, determine the first rotational speed as an end rotational speed of the rotational speed range, and determine the second rotational speed as being less than the first rotational speed;
the third determining unit is further configured to determine, if the first rotation speed of the jump rotation speed stage is within the non-working rotation speed range, the first rotation speed as a start rotation speed of the rotation speed range, determine the second rotation speed as an end rotation speed of the rotation speed range, and the second rotation speed is greater than the first rotation speed.
It follows that in a target rotational speed phase, such as a cut-in rotational speed phase or a rated rotational speed phase, which is liable to affect the service life of the wind turbine, a second rotational speed different from the first rotational speed is determined from the target rotational speed phase and the first rotational speed of the target rotational speed phase. When the target rotational speeds of the blades of the wind turbine are in the rotational speed range identified by the first rotational speed and the second rotational speed, a target torque corresponding to the target rotational speed may be determined based on a torque rotational speed matching relationship that optimizes the generated power. The corresponding torque can be dynamically determined based on the actual rotation speed of the blade in the rotation speed range and is used as a basis for adjusting the torque of the generator of the wind driven generator, so that the rotation speed at the target rotation speed stage is not constant any more, but gradually changes under the control of the torque, excitation vibration brought by rotation of the blade to the wind driven generator is not stable for a long time, the resonance degree of the tower is avoided, and the load of the tower is reduced.
In yet another aspect, an embodiment of the present application provides a computer device including a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to execute the vibration control method of the wind turbine according to the above embodiment according to the instructions in the program code.
The computer device may comprise a terminal device or a server, in which the aforementioned vibration control means of the wind turbine may be arranged.
In addition, the embodiment of the application also provides a storage medium for storing a computer program for executing the vibration control method of the wind driven generator provided by the embodiment.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the apparatus and system embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, with reference to the description of the method embodiments in part. The apparatus and system embodiments described above are merely illustrative, in which elements illustrated as separate elements may or may not be physically separate, and elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.
It should be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only one specific embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be included in the scope of the present application. Further combinations of the present application may be made to provide further implementations based on the implementations provided in the above aspects. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims (10)
1. A vibration control method of a wind power generator, the method comprising:
determining a second rotating speed to be adjusted according to a target rotating speed stage related to the wind driven generator and a first rotating speed of the target rotating speed stage, wherein the target rotating speed stage comprises a cut-in rotating speed stage or a rated rotating speed stage, and the first rotating speed is different from the second rotating speed;
when the target rotating speed of the blades of the wind driven generator is in a rotating speed range marked by the first rotating speed and the second rotating speed, determining a target torque corresponding to the target rotating speed according to a torque rotating speed matching relation based on optimized power generation;
and adjusting the generator torque of the wind driven generator to the target torque.
2. The method according to claim 1, wherein the method further comprises:
if the target rotational speed stage includes the plunge rotational speed stage, determining the first rotational speed as a start rotational speed of the rotational speed range, and determining the second rotational speed as an end rotational speed of the rotational speed range, the second rotational speed being greater than the first rotational speed;
and if the target rotating speed stage comprises the rated rotating speed stage, determining the second rotating speed as the starting rotating speed of the rotating speed range, determining the first rotating speed as the ending rotating speed of the rotating speed range, and enabling the second rotating speed to be smaller than the first rotating speed.
3. The method of claim 1, wherein the target rotational speed phase further comprises a transition rotational speed phase, the transition rotational speed phase being a rotational speed phase adjacent to a non-operational rotational speed range of the wind turbine.
4. A method according to claim 3, characterized in that the method further comprises:
if the first rotating speed of the jump rotating speed stage is in front of the non-working rotating speed range, determining the second rotating speed as the starting rotating speed of the rotating speed range, determining the first rotating speed as the ending rotating speed of the rotating speed range, wherein the second rotating speed is smaller than the first rotating speed;
and if the first rotating speed of the jump rotating speed stage is in the non-working rotating speed range, determining the first rotating speed as the starting rotating speed of the rotating speed range, and determining the second rotating speed as the ending rotating speed of the rotating speed range, wherein the second rotating speed is larger than the first rotating speed.
5. The method according to claim 1, wherein said determining a second rotational speed to be adjusted from a target rotational speed phase involved in the wind turbine and a first rotational speed of said target rotational speed phase comprises:
according to the first rotating speed of the target rotating speed stage, determining an acceleration parameter of a rotating speed interval in which the first rotating speed is positioned, wherein the acceleration parameter is used for identifying vibration acceleration of a tower of the wind driven generator at different rotating speeds;
and determining the second rotating speed based on the value of the vibration acceleration corresponding to the acceleration parameter.
6. The method according to any one of claims 1 to 5, wherein the torque-rotation speed matching relationship is expressed by the following formula:
T＝Kopt*w 2
where T is generator torque, kopt is a gain factor, and w is blade speed.
7. A vibration control device of a wind power generator, characterized in that the device comprises a first determination unit, a second determination unit and an adjustment unit:
the first determining unit is configured to determine a second rotation speed to be adjusted according to a target rotation speed stage related to the wind turbine and a first rotation speed of the target rotation speed stage, where the target rotation speed stage includes a cut-in rotation speed stage or a rated rotation speed stage, and the first rotation speed is different from the second rotation speed;
the second determining unit is used for determining a target torque corresponding to the target rotating speed according to a torque rotating speed matching relation based on optimized power generation when the target rotating speed of the blade of the wind driven generator is in a rotating speed range marked by the first rotating speed and the second rotating speed;
the adjusting unit is used for adjusting the generator torque of the wind driven generator to the target torque.
8. The apparatus according to claim 7, characterized in that the apparatus further comprises a third determination unit:
the third determining unit is configured to determine, if the target rotation speed stage includes the cut-in rotation speed stage, the first rotation speed as a start rotation speed of the rotation speed range, and determine the second rotation speed as an end rotation speed of the rotation speed range, where the second rotation speed is greater than the first rotation speed;
the third determining unit is further configured to determine the second rotation speed as a start rotation speed of the rotation speed range, determine the first rotation speed as an end rotation speed of the rotation speed range, and determine the second rotation speed as an end rotation speed of the rotation speed range if the target rotation speed stage includes the rated rotation speed stage, where the second rotation speed is smaller than the first rotation speed.
9. A computer device, the computer device comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to perform the method of any of claims 1-6 according to instructions in the program code.
10. A computer readable storage medium, characterized in that the computer readable storage medium is for storing a computer program for executing the method of any one of claims 1-6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210192027.XA CN116696668A (en) | 2022-02-28 | 2022-02-28 | Vibration control method and related device of wind driven generator |
| PCT/CN2022/101420 WO2023159830A1 (en) | 2022-02-28 | 2022-06-27 | Vibration control method for wind turbine and related device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210192027.XA CN116696668A (en) | 2022-02-28 | 2022-02-28 | Vibration control method and related device of wind driven generator |
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| Publication Number | Publication Date |
|---|---|
| CN116696668A true CN116696668A (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210192027.XA Pending CN116696668A (en) | 2022-02-28 | 2022-02-28 | Vibration control method and related device of wind driven generator |
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| Country | Link |
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| CN (1) | CN116696668A (en) |
| WO (1) | WO2023159830A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2620639B1 (en) * | 2012-01-30 | 2016-01-27 | ALSTOM Renewable Technologies | A method for dampening oscillations in a wind turbine |
| JP6388759B2 (en) * | 2013-05-29 | 2018-09-12 | エムエイチアイ ヴェスタス オフショア ウィンド エー／エス | Floating wind power generator |
| DK201470481A1 (en) * | 2014-08-13 | 2015-08-17 | Vestas Wind Sys As | Improvements relating to wind turbine operation |
| JP6352778B2 (en) * | 2014-11-17 | 2018-07-04 | 三菱重工業株式会社 | Floating wind power generator and method for operating the same |
| GB2591732B (en) * | 2019-12-20 | 2022-03-16 | Equinor Energy As | Wind turbine control |
| CN113847195B (en) * | 2020-06-28 | 2023-06-02 | 北京金风科创风电设备有限公司 | Wind generating set and rotational speed avoiding control method and device thereof |
| CN111706464B (en) * | 2020-06-30 | 2022-07-05 | 新疆金风科技股份有限公司 | Control method, device and medium for wind generating set |
-
2022
- 2022-02-28 CN CN202210192027.XA patent/CN116696668A/en active Pending
- 2022-06-27 WO PCT/CN2022/101420 patent/WO2023159830A1/en unknown
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| WO2023159830A1 (en) | 2023-08-31 |
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