CN111577543A - Wind turbine resonance zone crossing method and device, wind turbine and readable storage medium - Google Patents
Wind turbine resonance zone crossing method and device, wind turbine and readable storage medium Download PDFInfo
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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
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/103—Purpose of the control system to affect the output of the engine
- F05B2270/1032—Torque
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/32—Wind speeds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/327—Rotor or generator speeds
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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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- General Engineering & Computer Science (AREA)
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- Wind Motors (AREA)
Abstract
The embodiment of the invention discloses a wind motor resonance region crossing method, a wind motor resonance region crossing device, a wind motor and a readable storage medium, wherein the method comprises the following steps: detecting real-time wind speed and generator speed of the wind turbine; when the wind speed changes to enable the rotating speed of the generator to reach the rotating speed interval end value of the resonance area, determining the turbulence intensity of the current wind according to the wind speed, then determining the corresponding turbulence grade according to the turbulence intensity, and selecting the corresponding rotating speed-torque crossing interpolation function according to the turbulence grade; and controlling the torque of the generator to reach the corresponding rotating speed-torque crossing interpolation function, and starting to cross according to the corresponding rotating speed-torque crossing interpolation function after the torque corresponding to the rotating speed interval end value. According to the technical scheme, the wind motor is controlled to rapidly complete crossing, and meanwhile, more generated energy is prevented from being lost, so that not only is the stable operation of the wind motor ensured, the risk of resonance is reduced, but also the capture of wind energy can be effectively increased, and the waste of energy is avoided.
Description
Technical Field
The invention relates to the field of wind driven generator control, in particular to a wind driven generator resonance region crossing method and device, a wind driven generator and a readable storage medium.
Background
Wind energy is increasingly gaining attention as a clean renewable energy source in all countries of the world. The wind energy reserves of China are very large and the distribution range is wide. With the development of technical progress and environmental protection, wind power generation will be completely competitive with coal-fired power generation in commerce. With the continuous aggravation of the competition of the power industry, domestic excellent power enterprises attach more and more importance to the research on the industry market, particularly the deep research on the industry environment. With the rapid development of the wind power industry in recent years, the manufacturing technology of a domestic large-scale wind generating set tends to be mature at present, and as a core technology of the wind generating set, the control technology of the wind generating set is more and more mature, and a wind generating power supply comprises the wind generating set, a tower frame for supporting the wind generating set, a storage battery charging controller, an inverter, an unloader, a grid-connected controller, a storage battery pack and the like; the wind generating set comprises a generator and a wind wheel; the generator comprises blades, a hub, a reinforcing member and the like.
To fully utilize the wind resources in the low wind speed high shear plateau area near the load center, wind generating sets typically require longer blades, higher towers. However, as the tower increases, the first-order natural frequency of the tower decreases, and often the first-order natural frequency of the tower is smaller than 1P, where 1P is the excitation frequency of 1 time of the rotation speed of the generator. The modern wind turbine generator generally adopts a speed change technology, namely, the rotating speed of a generator of the wind turbine generator changes along with the change of the wind speed under the rated wind speed, mainly in order to capture wind energy to the maximum, in the working process of a typical wind turbine generator, the excitation frequency of the generator is necessarily superposed with the first-order natural frequency of a tower, and resonance is caused at the resonance rotating speed point, so that the large fatigue load of the wind turbine generator is caused. The usual solution is to avoid the unit running near the resonance point for a long time, i.e. passing through the tower resonance zone quickly.
In order to quickly traverse the tower resonance region upward (or downward), it is generally necessary to reduce (or increase) the torque of the generator, even if the torque is equal to zero (or a rated value), so that the generated power of the unit is reduced to zero (or a large value) in a short period of time.
Generally influenced by factors such as seasons, temperature, terrain and the like, the turbulence intensity of wind resources of a machine position where a wind turbine generator is located is changed, so that when a crossing strategy is designed, if crossing parameters are fixed, crossing delay or frequent crossing is caused when wind conditions which are not consistent with the design are met, and the wind turbine generator stays in a crossing interval for too long time; and then the vibration of the wind turbine generator is increased in the crossing process, and the operation of the fan deviates from the optimal power capture state, so that the power generation loss of the fan is increased.
Disclosure of Invention
In view of the above problems, the present invention provides a wind turbine resonance region crossing method, an apparatus, a wind turbine and a readable storage medium.
The first embodiment of the invention provides a wind turbine resonance zone crossing method, which comprises the following steps:
detecting real-time wind speed and generator speed of the wind turbine;
when the wind speed changes to enable the rotating speed of the generator to reach the rotating speed interval end value of the resonance area, determining the turbulence intensity of the current wind according to the wind speed, then determining the corresponding turbulence level according to the turbulence intensity, and selecting the corresponding rotating speed-torque crossing interpolation function according to the turbulence level;
and controlling the torque of the generator to reach the torque corresponding to the rotating speed-torque crossing interpolation function, and then starting to cross according to the corresponding rotating speed-torque crossing interpolation function after the torque corresponding to the rotating speed interval end value.
The above controlling the torque of the generator to reach the torque corresponding to the rotation speed-torque crossing interpolation function after the rotation speed interval end value starts to cross according to the corresponding rotation speed-torque crossing interpolation function includes:
when the wind speed is increased to enable the rotating speed of the generator to reach the lower limit of the rotating speed interval of the resonance area, controlling the torque to be increased to the torque corresponding to the rotating speed-torque crossing interpolation function at the lower limit of the rotating speed interval, and then controlling the torque to be reduced along with the increase of the rotating speed according to the corresponding rotating speed-torque crossing interpolation function so as to carry out upward crossing.
The wind turbine resonance area crossing method further comprises the following steps:
in the upward crossing process, when the wind speed is reduced so that the rotating speed of the generator is reduced, acquiring the current turbulence intensity;
determining the current turbulence level according to the current turbulence intensity, and selecting a corresponding rotating speed-torque crossing interpolation function according to the current turbulence level to obtain a current torque instruction;
and controlling the generator to reach a corresponding torque according to the torque command, and then controlling the torque to increase along with the reduction of the rotating speed according to the corresponding rotating speed-torque crossing interpolation function so as to carry out downward crossing.
The above controlling the torque of the generator to reach the torque corresponding to the rotation speed-torque crossing interpolation function after the rotation speed interval end value starts to cross according to the corresponding rotation speed-torque crossing interpolation function includes:
when the wind speed is reduced to enable the rotating speed of the generator to reach the upper limit of the rotating speed interval of the resonance area, controlling the torque to be reduced to the torque corresponding to the rotating speed-torque crossing interpolation function at the upper limit of the rotating speed interval, and then controlling the torque to increase along with the reduction of the rotating speed according to the corresponding rotating speed-torque crossing interpolation function so as to carry out downward crossing.
The wind turbine resonance area crossing method further comprises the following steps:
acquiring current turbulence intensity when the wind speed is increased so that the rotating speed of the generator is increased in the downward crossing process;
determining the current turbulence level according to the current turbulence intensity, and selecting a corresponding rotating speed-torque crossing interpolation function according to the current turbulence level to obtain a current torque instruction;
and controlling the generator to reach a corresponding torque according to the torque command, and then controlling the torque to reduce along with the increase of the rotating speed according to the corresponding rotating speed-torque crossing interpolation function so as to carry out upward crossing.
A second embodiment of the present invention provides a wind turbine resonance area crossing method, further including:
acquiring the real-time turbulence intensity of wind in the crossing process;
when the real-time turbulence intensity exceeds the range corresponding to the turbulence level corresponding to the current rotating speed-torque crossing interpolation function, determining the current turbulence level according to the real-time turbulence intensity, and selecting the corresponding rotating speed-torque crossing interpolation function according to the current turbulence level to obtain a current torque instruction;
and controlling the generator to reach the corresponding torque according to the torque command, and then continuously traversing according to the corresponding rotating speed-torque traversing interpolation function.
According to the wind motor resonance area crossing method, the corresponding turbulence level is determined according to the turbulence intensity, and the corresponding rotating speed-torque crossing interpolation function is selected according to the turbulence level, and the method comprises the following steps:
the higher the turbulence level, the lower the slope of the speed-torque crossing interpolation function is selected.
A third embodiment of the present invention provides a wind turbine resonance area crossing device, including:
the detection module is used for detecting the real-time wind speed and the generator rotating speed of the wind motor;
the selection module is used for determining the turbulence intensity of the current wind according to the wind speed when the wind speed changes to enable the rotating speed of the generator to reach the rotating speed interval end value of the resonance area, then determining the corresponding turbulence level according to the turbulence intensity, and selecting the corresponding rotating speed-torque crossing interpolation function according to the turbulence level;
and the control module is used for controlling the torque of the generator to reach the torque corresponding to the rotating speed-torque crossing interpolation function and then starts to cross according to the corresponding rotating speed-torque crossing interpolation function after the torque corresponding to the rotating speed interval end value.
The embodiment of the invention relates to a wind turbine, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor runs the computer program to enable the wind turbine to execute the wind turbine resonance region crossing method.
The above embodiments of the present invention relate to a readable storage medium storing a computer program which, when executed on a processor, performs the wind turbine resonance zone crossing method described above.
According to the method, the corresponding turbulence level is determined according to the turbulence intensity, the corresponding rotating speed-torque crossing interpolation function is selected according to the turbulence level, and the torque of the generator is controlled to reach the torque corresponding to the rotating speed-torque crossing interpolation function at the rotating speed interval end value and then starts to cross according to the corresponding rotating speed-torque crossing interpolation function. According to the scheme, a plurality of rotating speed-torque crossing interpolation functions are designed according to different turbulence intensities, and the corresponding rotating speed-torque crossing interpolation functions selected according to the turbulence intensities are used for crossing, so that the problems that in the prior art, a fan passes through lags or frequently passes through and stays in a crossing interval for too long time when a wind condition inconsistent with the design is met by using a fixed pre-designed crossing rule of the fan motor are solved; meanwhile, the problem that the generated energy loss of the fan is increased due to the fact that the fan runs away from the optimal crossing state when the vibration of the wind motor is increased in the crossing process is avoided. According to the technical scheme, the wind turbine is controlled to rapidly complete ride-through, and meanwhile, more generated energy is prevented from being lost, so that not only is the stable operation of the wind turbine ensured, but also the risk of resonance is reduced, and the capture of wind energy can be effectively increased.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of the present invention. Like components are numbered similarly in the various figures.
Fig. 1 shows a schematic flow chart of a wind turbine resonance zone crossing method provided by an embodiment of the invention;
fig. 2 is a schematic flow chart of a wind turbine resonance region upward traversing method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a method for traversing a resonance area of a wind turbine downwards according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of another wind turbine resonance zone crossing method provided by the embodiment of the invention;
fig. 5 is a schematic diagram illustrating a wind turbine resonance zone crossing process provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating another wind turbine resonance zone crossing process provided by the embodiment of the invention;
fig. 7 shows a schematic structural diagram of a wind turbine resonance region traversing device provided by an embodiment of the invention.
Description of the main element symbols:
1-passing through a device of a resonance area of a wind turbine; 100-a detection module; 200-a selection module; 300-control module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Hereinafter, the terms "including", "having", and their derivatives, which may be used in various embodiments of the present invention, are only intended to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
Example 1
In this embodiment, referring to fig. 1, a method for traversing a resonance area of a wind turbine is provided, as shown in fig. 1, the method for traversing the resonance area of the wind turbine includes the following steps:
step S100: and detecting the real-time wind speed and the generator rotating speed of the wind motor.
The wind turbine is a main device for converting wind energy into electric energy, and comprises a generator and a wind wheel, wherein the rotating speed of the generator is changed along with the change of wind speed in order to capture the wind energy maximally.
Step S200: when the wind speed changes to enable the rotating speed of the generator to reach the rotating speed interval end value of the resonance area, determining the turbulence intensity of the current wind according to the wind speed, then determining the corresponding turbulence level according to the turbulence intensity, and selecting the corresponding rotating speed-torque crossing interpolation function according to the turbulence level.
In the working process of a typical wind turbine, the excitation frequency of a generator is necessarily overlapped with the first-order natural frequency of a tower, a resonance rotating speed point is generated, and resonance is caused near the resonance rotating speed point, so that the fatigue load of the wind turbine is caused. In order to avoid that the wind turbine generator runs near a resonance point for a long time, namely the wind turbine generator quickly passes through a tower resonance area, when the wind speed changes to enable the rotating speed of the generator to reach the rotating speed interval end value of the resonance area, the turbulence intensity of the current wind is determined according to the wind speed, then the corresponding turbulence level is determined according to the turbulence intensity, and the corresponding rotating speed-torque passing interpolation function is selected according to the turbulence level so as to quickly pass through the tower resonance area by utilizing the corresponding rotating speed-torque passing interpolation function.
In this embodiment, the greater the turbulence intensity of the wind, the higher the corresponding turbulence level; the higher the turbulence level is, the smaller the slope of the corresponding rotating speed-torque crossing interpolation function is; conversely, the smaller the turbulence intensity of the wind, the lower the corresponding turbulence level; the lower the turbulence level, the greater the slope of the corresponding speed-torque crossing interpolation function.
It should be understood that the wind turbulence intensity reflects the change of the wind speed, the smaller the wind turbulence intensity is, the longer the time taken for crossing the resonance region is, the closer the wind turbulence intensity is to the resonance point, the larger the vibration amplitude is, and the larger the loss to the fan is, therefore, in the crossing process, if the wind turbulence intensity is smaller, the larger the slope of the corresponding speed-torque crossing interpolation function should be, the larger the slope is, the larger the torque change is, and the faster the crossing speed is; if the turbulence intensity is large in the crossing process, the wind turbine can quickly cross the resonance region by using the turbulence intensity, if the crossing is carried out according to the rotating speed-torque crossing interpolation function with a large slope, a large amount of electric energy is consumed in the crossing process, and in order to avoid excessive loss of the electric energy, the rotating speed-torque crossing interpolation function with a small slope is selected for crossing when the turbulence intensity is large, so that the excessive loss of the electric energy is avoided.
Exemplarily, referring to fig. 5, a schematic diagram of a wind turbine resonance zone crossing process is provided, in which turbulence levels are divided into three levels, each turbulence level corresponds to a certain turbulence intensity range, and k1, k2 and k3 respectively represent rotation speed-torque crossing interpolation functions corresponding to the three turbulence levels. It can be understood that when the wind speed changes slightly and the turbulence intensity is within the first-order turbulence level range, the crossing should be carried out according to the rotating speed-torque crossing interpolation function k3 with relatively large slope; when the variation of the wind speed is large and the turbulence intensity is within the three-stage turbulence level range, the crossing should be performed according to the rotating speed-torque crossing interpolation function k1 with relatively small slope.
It should be appreciated that in particular implementations, the turbulence intensity may be divided into a plurality of levels, one for each speed-torque crossing interpolation function.
Step S300: and controlling the torque of the generator to reach the torque corresponding to the rotating speed-torque crossing interpolation function, and then starting to cross according to the corresponding rotating speed-torque crossing interpolation function after the torque corresponding to the rotating speed interval end value.
And according to the selected corresponding rotating speed-torque crossing interpolation function, controlling the torque of the generator to reach the torque corresponding to the rotating speed-torque crossing interpolation function at the rotating speed interval end value, and then, carrying out crossing according to the corresponding rotating speed-torque crossing interpolation function.
The traversing in the above steps S100-S300 includes an upward traversing.
For example, when the wind speed increases so that the generator speed reaches the lower limit of the speed interval of the resonance region, after the torque is controlled to increase to the torque corresponding to the lower limit of the speed interval of the corresponding speed-torque crossing interpolation function, the torque is controlled to decrease with the increase of the speed according to the corresponding speed-torque crossing interpolation function so as to perform upward crossing.
For the upward crossing, referring to fig. 2, a method for crossing the resonance region of the wind turbine upward is proposed, as shown in fig. 2, the wind turbine further includes the following steps in the process of crossing the resonance region upward:
step S110: during the upward crossing, when the wind speed is reduced to reduce the rotating speed of the generator, the current turbulence intensity is obtained.
It can be understood that when the wind speed increases to make the generator speed reach the lower limit of the speed interval of the resonance region, the wind turbine starts to pass through upwards, but during the passing process, the wind speed may suddenly decrease, if the wind speed decreases to make the generator speed decrease, the current turbulence intensity needs to be obtained according to the wind speed, so as to reselect the speed-torque passing interpolation function according to the current turbulence intensity.
Step S210: and determining the current turbulence level according to the current turbulence intensity, and selecting a corresponding rotating speed-torque crossing interpolation function according to the current turbulence level to obtain a current torque instruction.
And determining the current turbulence level according to the current turbulence intensity obtained when the wind speed is reduced so that the rotating speed of the generator is reduced in the step S110, and selecting a corresponding rotating speed-torque crossing interpolation function according to the current turbulence level to obtain a current torque command.
Step S310: and controlling the generator to reach a corresponding torque according to the torque command, and then controlling the torque to increase along with the reduction of the rotating speed according to the corresponding rotating speed-torque crossing interpolation function so as to carry out downward crossing.
And acquiring a current torque command according to the step S210 to control the generator to reach a corresponding torque, and then controlling the torque to increase along with the reduction of the rotating speed according to the corresponding rotating speed-torque crossing interpolation function so as to carry out downward crossing.
Exemplarily, as shown in fig. 5, the rotation speed interval of the resonance region is [ a, e ], when the wind speed increases so that the rotation speed of the generator reaches the lower limit a of the rotation speed interval of the resonance region, it is determined that the turbulence intensity of the current wind is small according to the wind speed and is located in the range corresponding to the first-order turbulence level, a corresponding rotation speed-torque crossing interpolation function k3 is selected according to the first-order turbulence level, the torque of the generator is controlled to increase to the torque F1 corresponding to the lower limit a of the rotation speed interval by the corresponding rotation speed-torque crossing interpolation function k3, and then the torque of the generator is controlled to decrease with the increase of the rotation speed according to the corresponding rotation speed-torque crossing interpolation function k3 to perform upward crossing, which corresponds to the crossing process of AB in the figure.
In the upward crossing process according to the corresponding rotating speed-torque crossing interpolation function k3, the wind speed is suddenly reduced, if the rotating speed of the generator starts to be reduced at the b value due to the reduction of the wind speed, the turbulence intensity of the current wind is determined to be larger according to the wind speed and is located in the range corresponding to the three-level turbulence level, the corresponding rotating speed-torque crossing interpolation function k1 is reselected according to the three-level turbulence level, the torque F2 corresponding to the rotating speed b is obtained according to the rotating speed-torque crossing interpolation function k1, the generator is controlled to reach the corresponding torque F2, and the BC process in the figure is corresponded; and then controlling the torque to increase along with the reduction of the rotating speed according to the corresponding rotating speed-torque passing interpolation function k1 so as to carry out downward passing, which corresponds to the passing process of the CD in the figure.
The traversing in the steps S100-S300 further includes traversing downwards.
For example, when the wind speed is reduced so that the generator speed reaches the upper limit of the speed interval of the resonance region, after the torque is controlled to be reduced to the torque corresponding to the corresponding speed-torque crossing interpolation function at the upper limit of the speed interval, the torque is controlled to be increased along with the reduction of the speed according to the corresponding speed-torque crossing interpolation function so as to carry out downward crossing.
For the downward crossing, referring to fig. 3, a method for crossing the resonance region of the wind turbine downward is proposed, as shown in fig. 3, the wind turbine further includes the following steps in the process of crossing downward:
step S120: during the downward crossing, when the wind speed increases so that the rotating speed of the generator increases, the current turbulence intensity is obtained.
It can be understood that when the wind speed is reduced to make the generator rotate speed reach the upper limit of the rotation speed interval of the resonance region, the wind motor starts to pass through downwards, and if the wind speed is suddenly increased to make the generator rotate speed increase in the process of passing through downwards, the current turbulence intensity is determined according to the wind speed at the moment.
Step S220: and determining the current turbulence level according to the current turbulence intensity, and selecting a corresponding rotating speed-torque crossing interpolation function according to the current turbulence level to obtain a current torque instruction.
And determining the current turbulence level according to the current turbulence intensity obtained in the step S120, and selecting a corresponding rotation speed-torque crossing interpolation function according to the current turbulence level to obtain a current torque command.
Step S320: and controlling the generator to reach a corresponding torque according to the torque command, and then controlling the torque to reduce along with the increase of the rotating speed according to the corresponding rotating speed-torque crossing interpolation function so as to carry out upward crossing.
Further, the generator is controlled to reach the corresponding torque according to the torque command determined in the step S220, and then the torque is controlled to decrease with the increase of the rotation speed according to the corresponding rotation speed-torque crossing interpolation function to perform the upward crossing.
The downward traversing process is basically similar to the upward traversing process, and the description of related examples is not repeated here.
In this embodiment, a corresponding turbulence level is determined according to the turbulence intensity, a corresponding rotating speed-torque pass-through interpolation function is selected according to the turbulence level, and the torque of the generator is controlled to reach the torque corresponding to the rotating speed-torque pass-through interpolation function and then starts to pass through according to the corresponding rotating speed-torque pass-through interpolation function after the torque reaches the torque corresponding to the rotating speed interval end value. According to the scheme of the embodiment, a plurality of rotating speed-torque crossing interpolation functions are designed according to different turbulence intensities, and the corresponding rotating speed-torque crossing interpolation functions selected according to the turbulence intensities are used for crossing, so that the problems that in the prior art, a fan passes through lags or frequently passes through and stays in a crossing interval for too long time when the fan meets wind conditions inconsistent with the design by using a fixed pre-designed crossing rule are solved; meanwhile, the problem that the generated energy loss of the fan is increased due to the fact that the fan runs away from the optimal crossing state when the vibration of the wind motor is increased in the crossing process is avoided. According to the technical scheme, the wind motor is controlled to rapidly complete crossing, meanwhile, more generated energy is prevented from being lost, stable operation of the wind motor is guaranteed, the risk of resonance is reduced, capture of wind energy can be effectively increased, and energy waste is avoided.
Example 2
In this embodiment, referring to fig. 4, another wind turbine resonance area crossing method is provided, which shows that the wind turbine resonance area crossing method according to the above embodiment further includes the following steps:
step S400: acquiring the real-time turbulence intensity of wind in the crossing process;
during the crossing process of the fan, the wind speed is constantly changed, so that the real-time turbulence intensity of the wind is also constantly changed.
Step S500: and when the real-time turbulence intensity exceeds the range corresponding to the turbulence level corresponding to the current rotating speed-torque crossing interpolation function, determining the current turbulence level according to the real-time turbulence intensity, and selecting the corresponding rotating speed-torque crossing interpolation function according to the current turbulence level to obtain the current torque instruction.
When the real-time turbulence intensity obtained according to the wind speed exceeds the range corresponding to the turbulence level corresponding to the current rotating speed-torque crossing interpolation function, the current turbulence level can be determined according to the real-time turbulence intensity, the corresponding rotating speed-torque crossing interpolation function is reselected according to the current turbulence level, and then the current torque instruction is obtained according to the current rotating speed.
Step S600: and controlling the generator to reach the corresponding torque according to the torque command, and then continuously traversing according to the corresponding rotating speed-torque traversing interpolation function.
And after the generator is controlled to reach the corresponding torque, traversing continuously according to the newly selected corresponding rotating speed-torque traversing interpolation function.
Exemplarily, as shown in fig. 6, the rotation speed interval of the resonance region is [ a, e ], when the wind speed increases so that the rotation speed of the generator reaches the lower limit a of the rotation speed interval of the resonance region, it is determined that the turbulence intensity of the current wind is small according to the wind speed, and when the current wind is located in the range corresponding to the first-order turbulence level, the corresponding rotation speed-torque crossing interpolation function k3 is selected according to the first-order turbulence level, the torque of the generator is controlled to increase to the torque F3 corresponding to the lower limit a of the rotation speed interval by the corresponding rotation speed-torque crossing interpolation function k3, and then the torque of the generator is controlled to decrease with the increase of the rotation speed according to the corresponding rotation speed-torque crossing interpolation function k3 to perform upward crossing, which corresponds to the crossing process of EF in.
In the process of passing upwards according to the corresponding rotating speed-torque passing interpolation function k3, acquiring the real-time turbulence intensity of wind according to the wind speed, when the real-time turbulence intensity exceeds the range corresponding to the first-level turbulence level corresponding to the current rotating speed-torque passing interpolation function k3, determining that the current turbulence level is the second-level turbulence level according to the real-time turbulence intensity, selecting the corresponding rotating speed-torque passing interpolation function k2 according to the second-level turbulence level to acquire the torque command corresponding to the current rotating speed b, then controlling the generator to reach the corresponding torque F4 according to the torque command, corresponding to the FG process in the graph, and then continuing to pass according to the corresponding rotating speed-torque passing interpolation function k2, corresponding to the GH process in the graph.
In this embodiment, in the process that the wind turbine passes through the resonance region, the real-time turbulence intensity may be obtained according to the wind speed, the corresponding rotation speed-torque pass-through interpolation function is reselected, and the pass-through process is continuously executed according to the reselected corresponding rotation speed-torque pass-through interpolation function. In the crossing process, the optimal rotating speed-torque crossing interpolation function is selected in real time, the crossing process is guaranteed to cross the resonance region at the highest speed on the premise that electric energy is not excessively wasted, the fastest crossing is achieved through reasonable electric energy loss, and excessive loss of electric energy is effectively avoided.
Example 3
In the present embodiment, referring to fig. 7, a wind turbine resonance zone crossing device 1 is shown, and as shown in fig. 7, the wind turbine resonance zone crossing device 1 includes the following modules:
the detection module 100 is used for detecting the real-time wind speed and the generator rotating speed of the wind turbine;
a selecting module 200, configured to determine, when the wind speed changes such that the generator rotational speed reaches a rotational speed interval end value of the resonance region, a turbulence intensity of current wind according to the wind speed, then determine a corresponding turbulence level according to the turbulence intensity, and select a corresponding rotational speed-torque crossing interpolation function according to the turbulence level;
and the control module 300 is configured to control the torque of the generator to reach the torque corresponding to the rotation speed-torque crossing interpolation function, and then start to cross according to the corresponding rotation speed-torque crossing interpolation function after the torque corresponding to the rotation speed interval end value.
The wind turbine resonance zone crossing device 1 of this embodiment is used by matching the detection module 100, the selection module 200, and the control module 300 to execute the wind turbine resonance zone crossing method described in the above embodiment, and the implementation and beneficial effects related to the above embodiment are also applicable in this embodiment, and are not described again here.
It should be understood that the above embodiments relate to a wind turbine, including a memory for storing a computer program and a processor for executing the computer program to make the wind turbine perform the wind turbine resonance zone crossing method described in the above embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in each embodiment of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part of the technical solution that contributes to the prior art in essence can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A wind turbine resonance zone crossing method is characterized by comprising the following steps:
detecting real-time wind speed and generator speed of the wind turbine;
when the wind speed changes to enable the rotating speed of the generator to reach the rotating speed interval end value of the resonance area, determining the turbulence intensity of the current wind according to the wind speed, then determining the corresponding turbulence level according to the turbulence intensity, and selecting the corresponding rotating speed-torque crossing interpolation function according to the turbulence level;
and controlling the torque of the generator to reach the torque corresponding to the rotating speed-torque crossing interpolation function, and then starting to cross according to the corresponding rotating speed-torque crossing interpolation function after the torque corresponding to the rotating speed interval end value.
2. The wind turbine resonance zone crossing method according to claim 1, wherein controlling the torque of the generator to reach the corresponding rotating speed-torque crossing interpolation function and then starting to cross according to the corresponding rotating speed-torque crossing interpolation function after the torque corresponding to the rotating speed interval end value comprises:
when the wind speed is increased to enable the rotating speed of the generator to reach the lower limit of the rotating speed interval of the resonance area, controlling the torque to be increased to the torque corresponding to the rotating speed-torque crossing interpolation function at the lower limit of the rotating speed interval, and then controlling the torque to be reduced along with the increase of the rotating speed according to the corresponding rotating speed-torque crossing interpolation function so as to carry out upward crossing.
3. The wind turbine resonance zone traversing method according to claim 2, further comprising:
in the upward crossing process, when the wind speed is reduced so that the rotating speed of the generator is reduced, acquiring the current turbulence intensity;
determining the current turbulence level according to the current turbulence intensity, and selecting a corresponding rotating speed-torque crossing interpolation function according to the current turbulence level to obtain a current torque instruction;
and controlling the generator to reach a corresponding torque according to the torque command, and then controlling the torque to increase along with the reduction of the rotating speed according to the corresponding rotating speed-torque crossing interpolation function so as to carry out downward crossing.
4. The wind turbine resonance zone crossing method according to claim 1, wherein controlling the torque of the generator to reach the corresponding rotating speed-torque crossing interpolation function and then starting to cross according to the corresponding rotating speed-torque crossing interpolation function after the torque corresponding to the rotating speed interval end value comprises:
when the wind speed is reduced to enable the rotating speed of the generator to reach the upper limit of the rotating speed interval of the resonance area, controlling the torque to be reduced to the torque corresponding to the rotating speed-torque crossing interpolation function at the upper limit of the rotating speed interval, and then controlling the torque to increase along with the reduction of the rotating speed according to the corresponding rotating speed-torque crossing interpolation function so as to carry out downward crossing.
5. The wind turbine resonance zone traversing method according to claim 4, further comprising:
acquiring current turbulence intensity when the wind speed is increased so that the rotating speed of the generator is increased in the downward crossing process;
determining the current turbulence level according to the current turbulence intensity, and selecting a corresponding rotating speed-torque crossing interpolation function according to the current turbulence level to obtain a current torque instruction;
and controlling the generator to reach a corresponding torque according to the torque command, and then controlling the torque to reduce along with the increase of the rotating speed according to the corresponding rotating speed-torque crossing interpolation function so as to carry out upward crossing.
6. The wind turbine resonance zone traversing method according to any one of claims 1 to 5, further comprising:
acquiring the real-time turbulence intensity of wind in the crossing process;
when the real-time turbulence intensity exceeds the range corresponding to the turbulence level corresponding to the current rotating speed-torque crossing interpolation function, determining the current turbulence level according to the real-time turbulence intensity, and selecting the corresponding rotating speed-torque crossing interpolation function according to the current turbulence level to obtain a current torque instruction;
and controlling the generator to reach the corresponding torque according to the torque command, and then continuously traversing according to the corresponding rotating speed-torque traversing interpolation function.
7. The wind turbine resonance zone crossing method according to claim 1, wherein selecting a corresponding rotation speed-torque crossing interpolation function according to a turbulence level comprises:
the higher the turbulence level, the lower the slope of the speed-torque crossing interpolation function is selected.
8. A wind turbine resonance zone crossing device is characterized by comprising:
the detection module is used for detecting the real-time wind speed and the generator rotating speed of the wind motor;
the selection module is used for determining the turbulence intensity of the current wind according to the wind speed when the wind speed changes to enable the rotating speed of the generator to reach the rotating speed interval end value of the resonance area, then determining the corresponding turbulence level according to the turbulence intensity, and selecting the corresponding rotating speed-torque crossing interpolation function according to the turbulence level;
and the control module is used for controlling the torque of the generator to reach the torque corresponding to the rotating speed-torque crossing interpolation function and then starts to cross according to the corresponding rotating speed-torque crossing interpolation function after the torque corresponding to the rotating speed interval end value.
9. A wind turbine comprising a memory for storing a computer program and a processor for executing the computer program to cause the wind turbine to perform the wind turbine resonance zone crossing method according to any one of claims 1 to 7.
10. A readable storage medium, characterized in that it stores a computer program which, when run on a processor, performs the wind turbine resonance zone crossing method according to any one of claims 1 to 7.
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Address after: 102206 31 Industrial Park, North Qing Road, Beijing, Changping District Patentee after: Sany Heavy Energy Co.,Ltd. Address before: 102206 31 Industrial Park, North Qing Road, Beijing, Changping District Patentee before: SANY HEAVY ENERGY Co.,Ltd. |