CN109185055B - Method and device for quickly starting wind generating set and computer readable storage medium - Google Patents
Method and device for quickly starting wind generating set and computer 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
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Abstract
The invention relates to the technical field of wind power generation, and discloses a method and a device for quickly starting a wind generating set and a computer readable storage medium, wherein the method for quickly starting the wind generating set comprises the following steps: acquiring pneumatic data of a wind turbine blade, and obtaining a pneumatic model curve cluster of the wind turbine generator set according to the pneumatic data; obtaining a pitch angle control curve when the wind generating set is started with the maximum torque based on the aerodynamic model curve cluster; the pitch angle control curve is corrected to obtain the optimal pitch angle control curve, and the wind generating set is controlled to start based on the optimal pitch angle control curve, so that the pitch angle is dynamically adjusted when the wind generating set is started, the blades of the wind turbine obtain the maximum starting torque, the starting time of the wind generating set is reduced, the problem of long starting time caused by the fact that the wind generating set is started with a fixed pitch angle is effectively solved, and the operating efficiency of the wind generating set is improved.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a quick starting method and device of a wind generating set and a computer readable storage medium.
Background
In recent years, with the rapid development of the wind power industry, wind generating sets have been paid more attention as a device capable of converting wind energy into electric energy. The wind generating set generally includes a wind turbine, a generator, a tower frame, etc., and the wind turbine drives blades of the wind turbine to rotate by wind power to drive the generator to generate electricity, thereby converting wind energy into electric energy.
In the process of using the wind generating set, because the wind generating set is frequently started and stopped and the wind wheel has large moment of inertia, how to start the wind generating set more quickly and more stably is very important. In addition, the starting performance of the wind turbine set not only affects the starting time, but also has corresponding influence on the grid connection process, so the starting performance of the wind turbine set has great influence on the efficiency of the whole set.
Currently, existing wind power plants generally include a fixed pitch power plant and a variable pitch power plant, both of which are started with a fixed pitch angle. However, in the process of implementing the invention, the inventor finds that the prior art has at least the following problems: when the wind park is started with a fixed pitch angle, the time for starting the wind park is longer, thus resulting in inefficient operation of the wind park.
Disclosure of Invention
The invention aims to provide a method and a device for quickly starting a wind generating set and a computer readable storage medium, which are used for solving the technical problem that the starting time of the wind generating set is long due to the fact that the existing wind generating set is started with a fixed pitch angle, and the operating efficiency of the wind generating set is improved.
In order to solve the technical problem, the invention provides a method for quickly starting a wind generating set, which comprises the following steps:
acquiring pneumatic data of a wind turbine blade, and obtaining a pneumatic model curve cluster of a wind generating set according to the pneumatic data;
obtaining a pitch angle control curve when the wind generating set is started with the maximum torque based on the aerodynamic model curve cluster;
and correcting the pitch angle control curve to obtain an optimal pitch angle control curve, and controlling the wind generating set to start based on the optimal pitch angle control curve.
Compared with the prior art, the method for quickly starting the wind generating set disclosed by the embodiment of the invention obtains the pitch angle control curve when the wind generating set is started with the maximum torque by analyzing and calculating the obtained aerodynamic model curve cluster, and obtains the optimal pitch angle control curve based on the pitch angle control curve to control the start of the wind generating set, so that the pitch angle is dynamically adjusted when the wind generating set is started, the blades of a wind turbine obtain the maximum starting torque, the starting time of the wind generating set is further reduced, the problem of long starting time of the wind generating set caused by the fact that the wind generating set is started with the fixed pitch angle is effectively solved, and the operating efficiency of the wind generating set is improved.
As a refinement of the above solution, the aerodynamic data includes aerodynamic torque data, and the aerodynamic model curve cluster includes an aerodynamic torque model curve cluster;
the method for acquiring the aerodynamic data of the wind turbine blade and obtaining the aerodynamic model curve cluster of the wind turbine generator set according to the aerodynamic data specifically comprises the following steps:
acquiring aerodynamic torque data of a wind turbine blade at different wind speeds;
calculating to obtain a torque coefficient of a wind turbine blade and a blade tip speed ratio corresponding to the torque coefficient under different pitch angles and wind speeds based on the pneumatic torque data;
taking a torque coefficient under the same pitch angle and the blade tip speed ratio corresponding to the torque coefficient as a pneumatic torque point, and obtaining a corresponding pneumatic torque model curve by adopting an interpolation method or a curve fitting method based on the pneumatic torque point;
and taking the obtained aerodynamic torque model curves at different pitch angles as the aerodynamic torque model curve cluster.
As an improvement of the above scheme, the calculating, based on the aerodynamic torque data, a torque coefficient of a wind turbine blade and a tip speed ratio corresponding to the torque coefficient at different pitch angles and wind speeds includes:
based on the pneumatic torque data, calculating the torque coefficient of the wind turbine blade and the tip speed ratio corresponding to the torque coefficient under different pitch angles and wind speeds by using the following formula:
wherein, CTIs torque coefficient, lambda is tip speed ratio, β is pitch angle, TaIs a pneumatic torque; ρ is the air density; r is the radius of a rotating wheel of the wind turbine blade; v is the wind speed; and n is the rotating speed of the wind turbine blade.
As an improvement of the above scheme, the obtaining a pitch angle control curve when the wind turbine generator set is started at maximum torque based on the aerodynamic model curve cluster specifically includes:
obtaining a maximum torque coefficient corresponding to the tip speed ratio and a pitch angle corresponding to the maximum torque coefficient based on the pneumatic torque model curve cluster;
and fitting the target point by taking the blade tip speed ratio and the corresponding pitch angle as the target point so as to obtain a pitch angle control curve when the wind generating set is started with the maximum torque.
As an improvement of the above scheme, before the pitch angle control curve is corrected to obtain an optimal pitch angle control curve of the wind turbine generator system and the wind turbine generator system is controlled to start based on the optimal pitch angle control curve, the method further includes the steps of:
simplifying the pitch angle control curve obtained.
As an improvement of the above solution, the pitch angle control curve obtained by the simplification specifically includes:
and selecting segmentation points and segmentation numbers according to the shape of the pitch angle control curve, and carrying out segmentation linearization on the pitch angle control curve.
As an improvement of the above scheme, the correcting the pitch angle control curve to obtain an optimal pitch angle control curve specifically includes:
simulating or testing the starting process of the wind generating set by adopting the pitch angle control curve to obtain a pitch angle given value change curve and a pitch angle actual change curve;
and correcting the pitch angle control curve according to the difference between the pitch angle set value change curve and the pitch angle actual change curve, thereby obtaining an optimal pitch angle control curve.
The invention correspondingly provides a device for quickly starting a wind generating set, which comprises an aerodynamic model curve cluster module, a pitch angle control curve module and an execution module, wherein the aerodynamic model curve cluster module is used for carrying out control on the pitch angle;
the aerodynamic model curve cluster module is used for acquiring aerodynamic data of a wind turbine blade and obtaining an aerodynamic model curve cluster of the wind turbine generator set according to the aerodynamic data;
the pitch angle control curve module is used for obtaining a pitch angle control curve when the wind generating set is started at the maximum torque based on the aerodynamic model curve cluster;
and the execution module is used for correcting the pitch angle control curve to obtain an optimal pitch angle control curve and controlling the wind generating set to start based on the optimal pitch angle control curve.
Compared with the prior art, the device for quickly starting the wind generating set disclosed by the embodiment of the invention obtains the aerodynamic model curve cluster through the aerodynamic model curve cluster module, analyzes and calculates the obtained aerodynamic model curve cluster through the pitch angle control curve module to obtain the pitch angle control curve when the wind generating set is started at the maximum torque, and finally obtains the optimal pitch angle control curve through the execution module based on the pitch angle control curve to control the wind generating set to start according to the optimal pitch angle control curve, so that the dynamic pitch angle adjustment is realized when the wind generating set is started to ensure that the wind turbine blades obtain the maximum starting torque, the starting time of the wind generating set is further reduced, and the problem of long starting time of the wind generating set caused by the fact that the wind generating set is started at a fixed pitch angle is effectively avoided, therefore, the operation efficiency of the high wind generating set is improved.
The invention further provides a device for quickly starting a wind generating set, which comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to realize the method for quickly starting the wind generating set.
The invention further provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program runs, the apparatus on which the computer-readable storage medium is located is controlled to execute the method for quickly starting the wind turbine generator set.
Drawings
FIG. 1 is a schematic flow chart of a method for quickly starting a wind turbine generator system according to an embodiment of the present invention;
FIG. 2 is a graph of a cluster of aerodynamic torque model curves for a wind turbine generator system according to an embodiment of the present invention;
FIG. 3 is a pitch angle control graph of a wind turbine generator system according to an embodiment of the present invention;
FIG. 4 is a graph showing a pitch angle given value change curve and a pitch angle actual change curve of a wind generating set according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of controlling the start-up of a wind turbine generator set based on a pitch angle control curve provided by an embodiment of the present invention;
FIG. 6 is a schematic diagram of controlling the start-up of a wind turbine generator set based on an optimal pitch angle control curve according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a device for quickly starting a wind generating set according to an embodiment of the invention.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic flow chart of a method for quickly starting a wind turbine generator system according to an embodiment of the present invention is shown; as shown in fig. 1, a method for quickly starting a wind turbine generator system provided by an embodiment of the present invention includes the following steps:
and S1, acquiring the pneumatic data of the wind turbine blade, and acquiring the pneumatic model curve cluster of the wind turbine generator set according to the pneumatic data.
Specifically, the aerodynamic data comprises aerodynamic torque data, and the aerodynamic model curve cluster comprises an aerodynamic torque model curve cluster; it should be noted that the aerodynamic torque data may be obtained through an aerodynamic experiment of the wind turbine generator system, or may be obtained through monitoring in advance during the operation of the wind turbine generator system.
Therefore, when step S1 is implemented, the acquiring aerodynamic data of a wind turbine blade and obtaining an aerodynamic model curve cluster of a wind turbine generator set according to the aerodynamic data specifically includes the following steps:
s11, acquiring aerodynamic torque data of the wind turbine blade under different wind speeds;
s12, calculating a torque coefficient of a wind turbine blade and a blade tip speed ratio corresponding to the torque coefficient under different pitch angles and wind speeds based on the aerodynamic torque data; under the same pitch angle, the torque coefficient and the blade tip speed ratio are in one-to-one correspondence relationship;
specifically, the calculating, based on the aerodynamic torque data, to obtain the torque coefficient of the wind turbine blade and the tip speed ratio corresponding to the torque coefficient at different pitch angles and wind speeds includes:
based on the obtained pneumatic torque data at different wind speeds, the torque coefficient of the wind turbine blade and the tip speed ratio corresponding to the torque coefficient at different pitch angles and wind speeds are calculated by the following formula:
wherein, CTIs torque coefficient, lambda is tip speed ratio, β is pitch angle, TaIs a pneumatic torque; ρ is the air density; r is the radius of a rotating wheel of the wind turbine blade; v is the wind speed; and n is the rotating speed of the wind turbine blade. It should be noted that the wind speed corresponds to the aerodynamic torque, and the wind speed corresponds to the rotational speed of the wind turbine blade.
S13, taking the torque coefficient under the same pitch angle and the blade tip speed ratio corresponding to the torque coefficient as an aerodynamic torque point, and obtaining a corresponding aerodynamic torque model curve by adopting an interpolation method or a curve fitting method based on the aerodynamic torque point;
s14, the obtained aerodynamic torque model curves at the plurality of different pitch angles are used as the aerodynamic torque model curve cluster.
The torque coefficient C is calculatedTAnd the torque coefficient CTAfter the corresponding tip speed ratio lambda, by the torque coefficient CTIs ordinate and the corresponding tip speed ratio lambda is abscissa, so as to obtain a plurality of said aerodynamic torque points (lambda, C)T) (ii) a Processing the pneumatic torque points under the same pitch angle by adopting an interpolation method or a curve fitting method so as to obtain a pneumatic torque model curve corresponding to the pitch angle, namely CT-lambda curve, as shown in FIG. 2, wherein the curves shown by the solid lines are said aerodynamic torque model curves, and the curves shown by the solid lines respectively represent the torque coefficient C for a specific pitch angle of the wind turbine blade (β 1- β 5)TAs the tip speed ratio λ changes. Since different pitch angles correspond to different aerodynamic torque model curves, after step S13 is performed, a plurality of aerodynamic torque model curves at different pitch angles are obtained.
And S2, obtaining a pitch angle control curve when the wind generating set is started at the maximum torque based on the aerodynamic model curve cluster.
Specifically, in step S2, the obtaining a pitch angle control curve when the wind turbine generator set is started at maximum torque based on the aerodynamic model curve cluster specifically includes:
s21, obtaining a maximum torque coefficient corresponding to the tip speed ratio and a pitch angle corresponding to the maximum torque coefficient based on the aerodynamic torque model curve cluster;
specifically, as shown in fig. 2, in the aerodynamic torque model curve cluster diagram, a plurality of aerodynamic torque model curves at different pitch angles are staggered, so that the same tip speed ratio λ corresponds to a plurality of torque coefficients CT(ii) a By analyzing the curve cluster of the pneumatic torque model, the maximum torque coefficient C corresponding to each tip speed ratio lambda can be obtainedTMAXAnd obtaining the maximum torque coefficient CTMAXThe pitch angle β of the aerodynamic torque model curve, i.e. the maximum torque coefficient CTMAXCorresponding pitch angle β.
And S22, taking the blade tip speed ratio and the pitch angle as target points, and fitting the target points to obtain a pitch angle control curve when the wind generating set is started at the maximum torque.
Specifically, the maximum torque coefficient C corresponding to the tip speed ratio lambda is obtainedTMAXAnd with said maximum torque coefficient CTMAXAfter the corresponding pitch angle β, obtaining a target point (λ, β) by using the tip speed ratio λ as abscissa and the corresponding pitch angle β as ordinate, and obtaining the target point (λ, β) at CTAfter obtaining the target point (λ, β), representing the target point (λ, β) on a λ - β plane, and fitting the obtained target points (λ, β) to obtain a pitch angle control curve, i.e. a β - λ curve, when the wind turbine generator set is started up at maximum torque, as shown in fig. 3, the curve shown by the solid line in the figure is the pitch angle control curve.
In the embodiment of the present invention, in order to facilitate the analysis of the pitch angle control curve so as to obtain the optimal pitch angle control curve, after step S2 and before step S3, the present embodiment further includes the steps of:
simplifying the pitch angle control curve obtained.
Specifically, according to the shape of the obtained pitch angle control curve, a segmentation point and a segmentation number are selected, and the pitch angle control curve is subjected to segmentation linearization, so that a simplified pitch angle control curve is obtained.
The segmentation point and the number of segments may be selected according to the actual shape of the pitch angle control curve, and it is sufficient to ensure that the pitch angle control curve can be linearized. For convenience of processing and analysis, in the present embodiment, the pitch angle control curve is divided into 3 segments for linearization, as shown in fig. 3, the curve shown by the dotted line in the figure is a simplified pitch angle control curve, that is, a pitch angle control curve after being subjected to piecewise linearization processing.
And S3, correcting the pitch angle control curve to obtain an optimal pitch angle control curve, and controlling the wind generating set to start based on the optimal pitch angle control curve.
In step S3, the correcting the pitch angle control curve to obtain an optimal pitch angle control curve specifically includes the following steps:
s31, simulating or testing the starting process of the wind generating set by adopting the pitch angle control curve to obtain a pitch angle given value change curve and a pitch angle actual change curve;
specifically, as shown in fig. 4, a curve shown by a solid line in the figure is the pitch angle given value change curve, and a curve shown by a dashed line is the pitch angle actual change curve; as can be seen from fig. 4, there is a deviation between the pitch angle given value change curve and the pitch angle actual change curve, which indicates that after the adopted control target passes through links with inertia such as an executing mechanism, the actual executing action and the formulated control target have a certain hysteresis.
And S32, correcting the pitch angle control curve according to the difference between the pitch angle given value change curve and the pitch angle actual change curve, thereby obtaining an optimal pitch angle control curve.
In an embodiment of the invention, the pitch angle control curve has a certain hysteresis after passing through an inertial link such as an actuator when the pitch angle control curve is not corrected, i.e. during the start-up of the genset using the pitch angle control curve, more specifically as shown in FIG. 5, β is used based on the pitch angle control curve*During control of genset start, β*Through an actuator and the like having inertia 1/(T)1s +1), then β with relative lag is output and the generator set is controlled to start by β, thereby causing the actual action to be executed and the established control target to have certain lag, wherein T1Is the inertia time constant of the wind generating set.
Therefore, in order to eliminate the control deviation caused by the inertia of the wind generating set, the embodiment of the invention sets a proper correction link to correct the pitch angle control curve according to the difference between the pitch angle set value change curve and the pitch angle actual change curve, so as to obtain the final optimal pitch angle control curve when the wind generating set is started with the maximum torque. Specifically, one (T) is set1s+1)/(T2s +1) a correction link, adjusting parameters of the correction link through simulation or experimental iteration to eliminate deviation; wherein, T2A slight time constant is set for the controller calibration loop, specifically as shown in FIG. 6, based on the pitch angle control curve, at β*During control of genset start, β*Through a correction procedure (T)1s+1)/(T2s +1), β' is output, thus realizing the pair β*β' is then passed through an actuator or the like having inertia 1/(T)1s +1), β is output, and β controls the starting of the generator set, thereby effectively eliminating the control deviation caused by the inertia of the wind generator set, of course, β is adopted*β can also be used in the process of controlling the starting of the generator set*Firstly, the process passes through links 1/(T) with inertia such as an actuating mechanism and the like1s +1), and then the correction link (T) is set1s+1)/(T2s +1) are not described in further detail herein.
In the embodiment of the invention, the method for quickly starting the wind generating set realizes the starting of the wind generating set at the maximum torque. According to the method, the aerodynamic torque model curve is obtained according to the aerodynamic torque data of the wind turbine blade, the pitch angle control curve is obtained through the steps of conversion, interpolation, fitting, piecewise linearization and the like of the aerodynamic torque model curve, finally, the pitch angle control curve is subjected to iterative correction in an experiment or simulation mode and the like to obtain an optimal pitch angle control curve, and the wind turbine generator set is controlled to start based on the optimal pitch angle control curve, so that the pitch angle is dynamically adjusted when the wind turbine generator set starts, the pitch angle when the wind turbine generator set starts is optimized, and the wind turbine blade can be enabled to obtain the maximum starting torque. Compared with the prior art of starting with a fixed pitch angle, the method for quickly starting the wind generating set provided by the embodiment of the invention ensures that the wind generating set always obtains the maximum torque in the starting process, so that the set obtains shorter starting time, and the running efficiency of the set is improved.
As shown in fig. 7, in order to solve the same technical problem, the present invention further provides a device for fast starting a wind turbine generator system, which includes an aerodynamic model curve cluster module 1, a pitch angle control curve module 2 and an execution module 3;
the aerodynamic model curve cluster module 1 is used for acquiring aerodynamic data of a wind turbine blade and obtaining an aerodynamic model curve cluster of the wind turbine generator set according to the aerodynamic data;
the pitch angle control curve module 2 is used for obtaining a pitch angle control curve when the wind generating set is started at the maximum torque based on the aerodynamic model curve cluster;
and the execution module 4 is used for correcting the pitch angle control curve to obtain an optimal pitch angle control curve and controlling the wind generating set to start based on the optimal pitch angle control curve.
In the embodiment of the invention, the pitch angle control curve when the wind generating set is started with the maximum torque is obtained by analyzing and calculating the obtained aerodynamic model curve cluster through the pitch angle control curve module 2, and the execution module 3 obtains the optimal pitch angle control curve based on the pitch angle control curve to control the start of the wind generating set according to the optimal pitch angle control curve, so that the dynamic pitch angle adjustment is realized when the wind generating set is started, the wind turbine blade obtains the maximum starting torque, the start time of the wind generating set is further reduced, the problem of long start time of the wind generating set caused by the fact that the wind generating set is started with the fixed pitch angle is effectively avoided, and the operation efficiency of the high wind generating set is improved.
In the embodiment of the invention, the device for quickly starting the wind generating set further comprises a plurality of modules/units, so that the device for quickly starting the wind generating set can realize the steps in the method embodiment for quickly starting the wind generating set; the above description may be referred to for the method for quickly starting the wind turbine generator system, and further details are not described herein.
In order to solve the same technical problem, the invention also provides another device for quickly starting the wind generating set, which comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, such as a program for quickly starting the wind generating set. The processor, when executing the computer program, implements the steps in the above-described method embodiments of fast start of each wind turbine generator set, such as steps S1-S3 shown in fig. 1. Alternatively, the processor may be configured to implement the functions of the modules/units of the respective device embodiments described above when executing the computer program, for example, the functions of the aerodynamic model curve cluster module 1, the pitch angle control curve module 2, and the execution module 3 may be implemented.
The above program modules are merely exemplary, and the computer program may be divided into one or more modules/units, which are stored in the memory and executed by the processor to accomplish the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program in the device for the fast start of the wind turbine generator set. For example, the computer program may be divided into an aerodynamic model curve cluster module, a pitch angle control curve module and an execution module; the specific functions of each module are as follows: the aerodynamic model curve cluster module is used for acquiring aerodynamic data of a wind turbine blade and obtaining an aerodynamic model curve cluster of the wind turbine generator set according to the aerodynamic data; the pitch angle control curve module is used for obtaining a pitch angle control curve when the wind generating set is started at the maximum torque based on the aerodynamic model curve cluster; and the execution module is used for correcting the pitch angle control curve to obtain an optimal pitch angle control curve and controlling the wind generating set to start based on the optimal pitch angle control curve.
The device for quickly starting the wind generating set can be computing equipment such as a desktop computer, a notebook computer, a palm computer, a cloud server and the like. The device for quickly starting the wind generating set can comprise, but is not limited to, a processor and a memory. It will be appreciated by those skilled in the art that the schematic diagram is merely an example of an apparatus for rapid start-up of a wind park and does not constitute a limitation of the apparatus for rapid start-up of a wind park and may comprise more or less components than those shown, or some components in combination, or different components, e.g. the apparatus for rapid start-up of a wind park may further comprise input and output devices, network access devices, buses, etc.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general processor can be a microprocessor or the processor can be any conventional processor and the like, the processor is a control center of the device for quickly starting the wind generating set, and various interfaces and lines are utilized to connect various parts of the device for quickly starting the whole wind generating set.
The memory can be used for storing the computer program and/or the module, and the processor can realize various functions of the device for quickly starting the wind generating set by running or executing the computer program and/or the module stored in the memory and calling the data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
The device integrated module/unit for the quick start of the wind turbine generator system can be stored in a computer readable storage medium if it is realized in the form of a software functional unit and sold or used as a separate product. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (9)
1. A method for quickly starting a wind generating set is characterized by comprising the following steps:
acquiring pneumatic data of a wind turbine blade, and obtaining a pneumatic model curve cluster of a wind generating set according to the pneumatic data;
obtaining a pitch angle control curve when the wind generating set is started with the maximum torque based on the aerodynamic model curve cluster;
correcting the pitch angle control curve to obtain an optimal pitch angle control curve, and controlling a wind generating set to start based on the optimal pitch angle control curve;
wherein, the correcting the pitch angle control curve to obtain an optimal pitch angle control curve specifically includes:
simulating or testing the starting process of the wind generating set by adopting the pitch angle control curve to obtain a pitch angle given value change curve and a pitch angle actual change curve;
setting (T) according to the difference between said pitch angle set value change curve and said pitch angle actual change curve1s+1)/(T2s +1) correcting the pitch angle control curve by a correcting link so as to obtain an optimal pitch angle control curve; wherein, T1Is the inertia time constant, T, of the wind generating set2A small time constant is set for the controller calibration unit.
2. The method for wind turbine generator set rapid start according to claim 1, wherein the aerodynamic data comprises aerodynamic torque data, the aerodynamic model curve cluster comprises an aerodynamic torque model curve cluster;
the method for acquiring the aerodynamic data of the wind turbine blade and obtaining the aerodynamic model curve cluster of the wind turbine generator set according to the aerodynamic data comprises the following steps:
acquiring aerodynamic torque data of a wind turbine blade at different wind speeds;
calculating to obtain a torque coefficient of a wind turbine blade and a blade tip speed ratio corresponding to the torque coefficient under different pitch angles and wind speeds based on the pneumatic torque data;
taking a torque coefficient under the same pitch angle and the blade tip speed ratio corresponding to the torque coefficient as a pneumatic torque point, and obtaining a corresponding pneumatic torque model curve by adopting an interpolation method or a curve fitting method based on the pneumatic torque point;
and taking the obtained aerodynamic torque model curves at different pitch angles as the aerodynamic torque model curve cluster.
3. The method for rapidly starting a wind generating set according to claim 2, wherein the calculating of the torque coefficient of the wind turbine blade and the tip speed ratio corresponding to the torque coefficient at different pitch angles and wind speeds based on the aerodynamic torque data specifically comprises:
based on the pneumatic torque data, calculating the torque coefficient of the wind turbine blade and the tip speed ratio corresponding to the torque coefficient under different pitch angles and wind speeds by using the following formula:
wherein, CTIs torque coefficient, lambda is tip speed ratio, β is pitch angle, TaIs a pneumatic torque; ρ is the air density; r is the radius of a rotating wheel of the wind turbine blade; v is the wind speed; and n is the rotating speed of the wind turbine blade.
4. Method for the fast start-up of a wind park according to claim 3, wherein said obtaining a pitch angle control curve for the start-up of a wind park at maximum torque based on said aerodynamic model curve cluster, comprises in particular:
obtaining a maximum torque coefficient corresponding to the tip speed ratio and a pitch angle corresponding to the maximum torque coefficient based on the pneumatic torque model curve cluster;
and fitting the target point by taking the blade tip speed ratio and the corresponding pitch angle as the target point so as to obtain a pitch angle control curve when the wind generating set is started with the maximum torque.
5. A method for fast start-up of a wind park according to any of claims 1-4, wherein before said correcting of said pitch angle control curve, obtaining an optimum pitch angle control curve, and controlling the start-up of the wind park based on said optimum pitch angle control curve, further comprising the steps of:
simplifying the pitch angle control curve obtained.
6. Method for the rapid start-up of a wind park according to claim 5, wherein said simplifying the obtained pitch angle control curve comprises in particular:
and selecting segmentation points and segmentation numbers according to the shape of the pitch angle control curve, and carrying out segmentation linearization on the pitch angle control curve.
7. A device for quickly starting a wind generating set is characterized by comprising an aerodynamic model curve cluster module, a pitch angle control curve module and an execution module;
the aerodynamic model curve cluster module is used for acquiring aerodynamic data of a wind turbine blade and obtaining an aerodynamic model curve cluster of the wind turbine generator set according to the aerodynamic data;
the pitch angle control curve module is used for obtaining a pitch angle control curve when the wind generating set is started at the maximum torque based on the aerodynamic model curve cluster;
the execution module is used for correcting the pitch angle control curve to obtain an optimal pitch angle control curve and controlling a wind generating set to start based on the optimal pitch angle control curve;
wherein, the correcting the pitch angle control curve to obtain an optimal pitch angle control curve specifically includes:
simulating or testing the starting process of the wind generating set by adopting the pitch angle control curve to obtain a pitch angle given value change curve and a pitch angle actual change curve;
according to the difference between the set value change curve of the pitch angle and the actual change curve of the pitch angle,setting (T)1s+1)/(T2s +1) correcting the pitch angle control curve by a correcting link so as to obtain an optimal pitch angle control curve; wherein, T1Is the inertia time constant, T, of the wind generating set2A small time constant is set for the controller calibration unit.
8. An apparatus for fast start-up of a wind park comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor when executing the computer program implementing the method for fast start-up of a wind park according to any of claims 1 to 6.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored computer program, wherein the computer program, when running, controls an apparatus in which the computer-readable storage medium is located to perform the method for fast starting of a wind turbine generator set according to any one of claims 1 to 6.
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|---|---|---|---|---|
| CN107642457A (en) * | 2016-07-20 | 2018-01-30 | 锐电科技有限公司 | A kind of wind-driven generator set of long-period control parameter self-adjusting system and method |
| CN107781109A (en) * | 2016-08-24 | 2018-03-09 | 北京金风科创风电设备有限公司 | Power optimization method, device and the equipment of wind power generating set |
| CN108334672A (en) * | 2018-01-14 | 2018-07-27 | 浙江大学 | Variable Speed Wind Power Generator maximal wind-energy capture method based on effective wind speed estimation |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107642457A (en) * | 2016-07-20 | 2018-01-30 | 锐电科技有限公司 | A kind of wind-driven generator set of long-period control parameter self-adjusting system and method |
| CN107781109A (en) * | 2016-08-24 | 2018-03-09 | 北京金风科创风电设备有限公司 | Power optimization method, device and the equipment of wind power generating set |
| CN108334672A (en) * | 2018-01-14 | 2018-07-27 | 浙江大学 | Variable Speed Wind Power Generator maximal wind-energy capture method based on effective wind speed estimation |
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