CN111456898A - Method, system, medium and electronic device for adjusting generated power of wind turbine generator - Google Patents
Method, system, medium and electronic device for adjusting generated power of wind turbine generator Download PDFInfo
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- CN111456898A CN111456898A CN202010287058.4A CN202010287058A CN111456898A CN 111456898 A CN111456898 A CN 111456898A CN 202010287058 A CN202010287058 A CN 202010287058A CN 111456898 A CN111456898 A CN 111456898A
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- 238000010248 power generation Methods 0.000 claims abstract description 23
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- 238000004590 computer program Methods 0.000 claims description 9
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- 238000004364 calculation method Methods 0.000 claims description 6
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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
- 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
-
- 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
- F05B2270/1033—Power (if explicitly mentioned)
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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
- F05B2270/304—Spool rotational speed
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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
-
- 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
- F05B2270/335—Output power or torque
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Eletrric Generators (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a method, a system, a medium and electronic equipment for adjusting the generated power of a wind turbine generator. The adjusting method comprises the following steps: acquiring a current wind speed; calculating the current turbulence intensity according to the current wind speed; if the current turbulence intensity exceeds a preset critical turbulence intensity, detecting whether the current generating power of the wind turbine generator exceeds a preset power threshold value; and if the power exceeds the preset power threshold, reducing the generated power by reducing the electromagnetic torque of the wind turbine generator. When the wind speed changes rapidly, the generating power of the wind turbine generator is reduced by reducing the torque, the risk of shutdown of the wind turbine generator caused by the power generation overrun of the wind turbine generator is greatly reduced, and the generating capacity is effectively improved.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a method, a system, a medium and electronic equipment for adjusting the generated power of a wind turbine generator.
Background
Wind energy is used as a clean energy source, has considerable attraction at present due to the shortage of resources and the increasingly prominent environmental problems, and the development trend of the power industry is to replace the traditional coal-fired and oil-fired thermal power by using a wind power generation technology. The wind power generation is clean and has good environmental benefit; the wind energy can be regenerated and never exhausted; the infrastructure period is short; flexible installation scale, low operation and maintenance cost and the like.
Although wind power generation has various advantages, the wind turbine generator is usually built in mountainous regions or plateau regions with complex environmental factors, so that the wind turbine generator is poor in operating conditions and is easily influenced by large turbulence, and the condition of power generation overrun is easily caused in the power generation process of the wind turbine generator.
In the prior art, a pitch system is usually adopted to adjust the power of a wind turbine generator, namely, the pitch angle of a wind turbine blade is adjusted, above a rated wind speed, especially when a sudden change of the wind speed occurs. During pitching, the torque remains constant. When the wind speed changes rapidly (namely, the turbulence is large), the response of a variable pitch system has hysteresis, and the generating power of the wind turbine generator cannot be adjusted in time, so that the generating of the wind turbine generator is out of limit, the wind turbine generator is subjected to fault alarm and is shut down, and the precious generating capacity is lost.
Disclosure of Invention
The invention aims to overcome the defect that the generated power of a wind turbine generator cannot be timely adjusted through a variable pitch system when the wind speed changes rapidly in the prior art, so that the wind turbine generator is prone to generating power overrun, and provides a method, a system, a medium and electronic equipment for adjusting the generated power of the wind turbine generator.
The invention solves the technical problems through the following technical scheme:
a method for adjusting the generated power of a wind turbine generator set comprises the following steps:
acquiring a current wind speed;
calculating the current turbulence intensity according to the current wind speed;
if the current turbulence intensity exceeds a preset critical turbulence intensity, detecting whether the current generating power of the wind turbine generator exceeds a preset power threshold value;
and if the power exceeds the preset power threshold, reducing the generated power by reducing the electromagnetic torque of the wind turbine generator.
Preferably, the step of detecting whether the current generated power of the wind turbine exceeds a preset power threshold includes:
acquiring the current rotating speed of the wind turbine generator and the current electromagnetic torque corresponding to the current rotating speed;
judging whether the current electromagnetic torque exceeds a torque limit value or not by referring to a preset power boundary curve, wherein the torque limit value is indicated by the power boundary curve, and when the generated power does not exceed the preset power threshold value, the maximum electromagnetic torque value corresponding to the current rotating speed is judged;
if the current generated power exceeds the torque limit value, determining that the current generated power exceeds a preset power threshold value;
and if the torque limit value is not exceeded, determining that the current generating power is smaller than the preset power threshold value.
Preferably, before acquiring the current wind speed, the method further includes:
acquiring historical rotating speed of the wind turbine generator set in a historical time period and historical electromagnetic torque corresponding to the historical rotating speed, wherein the historical time period is a time period when the generated power exceeds the preset power threshold;
and generating a boundary curve corresponding to the historical time period according to the historical rotating speed and the historical electromagnetic torque to serve as the preset power boundary curve.
Preferably, before acquiring the current wind speed, the method further comprises: acquiring historical wind speed corresponding to a historical time period, wherein the historical time period is a time period when the generated power exceeds the preset power threshold;
and calculating the preset critical turbulence intensity by using the historical wind speed.
Preferably, the reducing the generated power by reducing the electromagnetic torque of the wind turbine further comprises:
acquiring the actual wind speed after the generated power is continuously reduced for a preset time;
calculating actual turbulence intensity by using the actual wind speed;
detecting whether the actual turbulence intensity is smaller than the preset critical turbulence intensity;
if so, adjusting the wind turbine generator to an original operation state, wherein the original operation state is the state before the generated power of the wind turbine generator is reduced;
and if not, controlling the wind turbine generator to operate in the state after the generated power is reduced.
Preferably, the historical time period comprises a plurality of time intervals;
the acquiring of the historical wind speed corresponding to the historical time period comprises:
acquiring historical wind speeds in a plurality of time intervals;
the calculating the preset critical turbulence intensity by using the historical wind speed comprises the following steps:
respectively calculating the turbulence intensity corresponding to each time interval by using the historical wind speed in each time interval;
and calculating the average value of the turbulence intensities corresponding to the plurality of time intervals to serve as the preset critical turbulence intensity.
Preferably, the wind turbine generator comprises a converter;
the step of reducing the generated power by reducing the electromagnetic torque of the wind turbine generator includes:
and controlling the converter to reduce the electromagnetic torque of the wind turbine generator so as to reduce the generated power.
A regulation system of the power generation of a wind turbine, said regulation system comprising:
the wind speed acquisition module is used for acquiring the current wind speed;
the turbulence intensity calculating module is used for calculating the current turbulence intensity according to the current wind speed;
the detection module is used for detecting whether the current generating power of the wind turbine generator exceeds a preset power threshold value or not when the current turbulence intensity exceeds a preset critical turbulence intensity;
the adjusting module is used for reducing the generated power by reducing the electromagnetic torque of the wind turbine generator when the current generated power exceeds a preset power threshold value.
Preferably, the detection module is configured to obtain a current rotation speed of the wind turbine generator and a current electromagnetic torque corresponding to the current rotation speed; judging whether the current electromagnetic torque exceeds a torque limit value or not by referring to a preset power boundary curve, wherein the torque limit value is indicated by the power boundary curve, and when the generated power does not exceed the preset power threshold value, the maximum electromagnetic torque value corresponding to the current rotating speed is judged; if the current generated power exceeds the torque limit value, determining that the current generated power exceeds a preset power threshold value; and if the torque limit value is not exceeded, determining that the current generating power is smaller than the preset power threshold value.
Preferably, the adjustment system further comprises:
the parameter acquisition module is used for acquiring historical rotating speed of the wind turbine generator set in a historical time period and historical electromagnetic torque corresponding to the historical rotating speed, wherein the historical time period is a time period when the generated power exceeds the preset power threshold;
and the boundary curve generating module is used for generating a boundary curve corresponding to the historical time period according to the historical rotating speed and the historical electromagnetic torque to serve as the preset power boundary curve.
Preferably, the wind speed obtaining module is further configured to obtain a historical wind speed corresponding to a historical time period, where the historical time period is a time period when the generated power exceeds the preset power threshold;
the turbulence intensity calculating module is further used for calculating the preset critical turbulence intensity by using the historical wind speed.
Preferably, the wind speed obtaining module is further configured to obtain, after the generated power is reduced, an actual wind speed after the generated power is continuously reduced for a preset time;
the turbulence intensity calculating module is also used for calculating the actual turbulence intensity by utilizing the actual wind speed;
the detection module is further used for detecting whether the actual turbulence intensity is smaller than the preset critical turbulence intensity;
if so, the adjusting module is further used for adjusting the wind turbine generator to an original operation state, wherein the original operation state is a state before the generated power of the wind turbine generator is reduced;
and if not, the adjusting module is also used for controlling the wind turbine generator to operate in the state after the generated power is reduced.
Preferably, the historical time period comprises a plurality of time intervals;
the wind speed acquisition module is used for acquiring historical wind speeds in a plurality of time intervals;
the turbulence intensity calculation module is used for calculating the turbulence intensity corresponding to each time interval by using the historical wind speed in each time interval; and calculating the average value of the turbulence intensities corresponding to the plurality of time intervals to serve as the preset critical turbulence intensity.
Preferably, the wind turbine generator comprises a converter;
the adjusting module reduces the electromagnetic torque of the wind turbine generator by controlling the converter so as to reduce the generated power.
An electronic device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the steps of the aforementioned method for adjusting the generated power of a wind turbine generator.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the aforementioned steps of the method of adjusting the generated power of a wind turbine.
The positive progress effects of the invention are as follows: the method, the system, the medium and the electronic equipment for adjusting the generating power of the wind turbine generator can quickly respond to reduce the generating power of the wind turbine generator when the wind speed changes rapidly and the pitch system cannot feather in time to reduce the generating power of the wind turbine generator, greatly reduce the shutdown risk of the wind turbine generator caused by the over-limit of power generation of the wind turbine generator and effectively improve the generating capacity.
Drawings
Fig. 1 is a flowchart of a method for adjusting the generated power of a wind turbine generator in embodiment 1 of the present invention.
Fig. 2 is a flowchart of a method for adjusting the generated power of the wind turbine generator in embodiment 2 of the present invention.
Fig. 3 is a schematic diagram of a power boundary curve in embodiment 2 of the present invention.
Fig. 4 is a block diagram of a system for adjusting the generated power of a wind turbine generator according to embodiment 3 of the present invention.
Fig. 5 is a block diagram of a system for adjusting the generated power of a wind turbine generator according to embodiment 4 of the present invention.
Fig. 6 is a schematic structural diagram of an electronic device in embodiment 5 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
The embodiment provides a method for adjusting the generated power of a wind turbine generator, wherein the wind turbine generator may include a wind wheel, a gearbox, a generator, a converter, a controller and the like.
As shown in fig. 1, the adjusting method may include:
step S10: acquiring a current wind speed;
step S11: calculating the current turbulence intensity according to the current wind speed;
the turbulence intensity is a degree describing the change of the wind speed along with time and space, can reflect the relative intensity of the fluctuating wind speed, and is the most important characteristic quantity describing the movement characteristics of the atmospheric turbulence. Turbulence is generated mainly by two reasons, one is that the air flow is rubbed or retarded by the roughness of the ground as it flows, and the other is due to the vertical movement of the air flow caused by the difference in air density and atmospheric temperature.
The calculation mode of the turbulence intensity can adopt a calculation formula commonly used in the prior art, namely: turbulence intensity is the standard deviation of wind speed/average wind speed.
As will be appreciated by those skilled in the art, for calculating the turbulence intensity, current wind speed refers to a plurality of wind speed values within a time interval including the current time.
Step S12: if the current turbulence intensity exceeds a preset critical turbulence intensity, detecting whether the current generating power of the wind turbine generator exceeds a preset power threshold value;
step S13: and if the power exceeds the preset power threshold, reducing the generated power by reducing the electromagnetic torque of the wind turbine generator.
Preferably, the torque of the wind turbine generator can be reduced by controlling a converter to reduce the generated power. Specifically, an SPWM (sine wave pulse width modulation) technique may be used to control the converter to reduce the torque of the wind turbine, and since the torque is positively correlated with the generated power, the generated power is also reduced when the torque is reduced.
According to the method for adjusting the generated power of the wind turbine generator, the generated power of the wind turbine generator can be reduced by reducing the electromagnetic torque of the wind turbine generator in time when the wind speed changes rapidly and the pitch system cannot feather in time to reduce the generated power of the wind turbine generator, the shutdown risk of the wind turbine generator caused by the power generation overrun of the wind turbine generator is greatly reduced, and the generated energy is effectively improved.
In this embodiment, before the current wind speed is obtained in step S10, a historical wind speed corresponding to a historical time period may also be obtained, and the preset critical turbulence intensity is calculated using the historical wind speed; the historical time period is a time period when the generated power exceeds the preset power threshold.
Preferably, the historical time period may include a plurality of time intervals. Based on this, the obtaining of the historical wind speed corresponding to the historical time period may be performed by: acquiring historical wind speeds in a plurality of time intervals;
the calculating of the preset critical turbulence intensity using the historical wind speed may be performed by: respectively calculating the turbulence intensity corresponding to each time interval by using the historical wind speed in each time interval; and calculating the average value of the turbulence intensities corresponding to the plurality of time intervals to serve as the preset critical turbulence intensity.
Further, the method for reducing the generated power by reducing the electromagnetic torque of the wind turbine generator may further include the following steps:
step S14: acquiring the actual wind speed after the generated power is continuously reduced for a preset time;
step S15: calculating actual turbulence intensity by using the actual wind speed;
step S16: detecting whether the actual turbulence intensity is smaller than the preset critical turbulence intensity;
step S17: if so, adjusting the wind turbine generator to an original operation state, wherein the original operation state is the state before the generated power of the wind turbine generator is reduced;
step S18: and if not, controlling the wind turbine generator to operate in the state after the generated power is reduced.
Example 2
The embodiment provides a method for adjusting the generated power of a wind turbine, which is a further improvement on embodiment 1, as shown in fig. 2,
the step S12 may specifically include:
step S121: acquiring the current rotating speed of the wind turbine generator and the current electromagnetic torque corresponding to the current rotating speed;
step S122: judging whether the current electromagnetic torque exceeds a torque limit value or not by referring to a preset power boundary curve, wherein the torque limit value is indicated by the power boundary curve, and when the generated power does not exceed the preset power threshold value, the maximum electromagnetic torque value corresponding to the current rotating speed is judged;
step S123: if the current generated power exceeds the torque limit value, determining that the current generated power exceeds a preset power threshold value;
in addition, if the torque limit value is not exceeded, the current generating power is determined to be smaller than the preset power threshold value. When it is determined that the current generation power is less than the preset power threshold, the step S13 need not be performed.
Further, step S10 may be preceded by:
step S20: acquiring historical rotating speed of the wind turbine generator set in a historical time period and historical electromagnetic torque corresponding to the historical rotating speed, wherein the historical time period is a time period when the generated power exceeds the preset power threshold;
step S21: and generating a boundary curve corresponding to the historical time period according to the historical rotating speed and the historical electromagnetic torque to serve as the preset power boundary curve.
Preferably, the power boundary curve of the present invention can be plotted in a two-dimensional coordinate system, as shown in fig. 3, the power boundary curve can be obtained by mathematically fitting a plurality of sets of points defined by torque and rotation speed, and as can be seen from fig. 3, the rotation speed and the torque are inversely proportional, and the power boundary curve and the X-axis and the Y-axis in the two-dimensional coordinate system enclose an area on a plane.
In this embodiment, the wind speed can be obtained by an anemometer, the rotating speed can be obtained by a rotating speed sensor, and the torque can be directly output or displayed by a converter.
According to the method for adjusting the generating power of the wind turbine generator, the historical operating state of the wind turbine generator can be applied to the detection of whether the current power exceeds the limit, so that the detection result is closer to the actual operation, the detection precision is improved, and the accuracy of power adjustment is further enhanced.
Example 3
The present embodiment provides a system for adjusting generated power of a wind turbine, as shown in fig. 4, where the adjusting system 1 includes:
the wind speed acquisition module 11 is used for acquiring a current wind speed;
a turbulence intensity calculating module 12, configured to calculate a current turbulence intensity according to the current wind speed;
the detection module 13 is configured to detect whether the current generated power of the wind turbine exceeds a preset power threshold when the current turbulence intensity exceeds a preset critical turbulence intensity;
the adjusting module 14 is configured to reduce the generated power by reducing the electromagnetic torque of the wind turbine when the current generated power exceeds a preset power threshold.
The turbulence intensity is a degree describing the change of the wind speed along with time and space, can reflect the relative intensity of the fluctuating wind speed, and is the most important characteristic quantity describing the movement characteristics of the atmospheric turbulence. Turbulence is generated mainly by two reasons, one is that the air flow is rubbed or retarded by the roughness of the ground as it flows, and the other is due to the vertical movement of the air flow caused by the difference in air density and atmospheric temperature.
The calculation mode of the turbulence intensity can adopt a calculation formula commonly used in the prior art, namely: turbulence intensity is the standard deviation of wind speed/average wind speed.
As will be appreciated by those skilled in the art, for calculating the turbulence intensity, current wind speed refers to a plurality of wind speed values within a time interval including the current time.
Preferably, the adjusting module 14 may reduce the torque of the wind turbine generator by controlling a converter to reduce the generated power. Specifically, an SPWM (sine wave pulse width modulation) technique may be used to control the converter to reduce the torque of the wind turbine, and since the torque is positively correlated with the generated power, the generated power is also reduced when the torque is reduced.
The wind speed obtaining module 11 is further configured to obtain a historical wind speed corresponding to a historical time period, where the historical time period is a time period when the generated power exceeds the preset power threshold;
the turbulence intensity calculating module 12 is further configured to calculate the preset critical turbulence intensity by using the historical wind speed.
The wind speed obtaining module 11 is further configured to obtain, after the generated power is reduced, an actual wind speed after the generated power is continuously reduced for a preset time;
the turbulence intensity calculating module 12 is further configured to calculate an actual turbulence intensity by using the actual wind speed;
the detection module 13 is further configured to detect whether the actual turbulence intensity is smaller than the preset critical turbulence intensity;
if so, the adjusting module 14 is further configured to adjust the wind turbine to an original operating state, where the original operating state is a state before the generated power of the wind turbine is reduced;
if not, the adjusting module 14 is further configured to control the wind turbine to operate in a state after the generated power is reduced.
Preferably, the historical time period comprises a plurality of time intervals. Based on this, the wind speed obtaining module 11 is configured to obtain historical wind speeds in a plurality of time intervals;
the turbulence intensity calculating module 12 is configured to calculate turbulence intensity corresponding to each time interval by using the historical wind speed in each time interval; and calculating the average value of the turbulence intensities corresponding to the plurality of time intervals to serve as the preset critical turbulence intensity.
The adjusting system of the generated power of the wind turbine generator set provided by the embodiment can change fast at the wind speed when operating, and the variable pitch system can not feather in time to reduce the generated power of the wind turbine generator set, so as to respond in time and reduce the generated power of the wind turbine generator set, greatly reduce the shutdown risk of the wind turbine generator set caused by the over-limit of the generated power, and effectively improve the generated energy.
Example 4
The present embodiment provides a system for regulating the generated power of a wind turbine generator, which is a further improvement on embodiment 3, as shown in fig. 5.
Specifically, the detection module 13 is configured to obtain a current rotation speed of the wind turbine generator and a current electromagnetic torque corresponding to the current rotation speed; judging whether the current electromagnetic torque exceeds a torque limit value or not by referring to a preset power boundary curve, wherein the torque limit value is indicated by the power boundary curve, and when the generated power does not exceed the preset power threshold value, the maximum electromagnetic torque value corresponding to the current rotating speed is judged; if the current generated power exceeds the torque limit value, determining that the current generated power exceeds a preset power threshold value; and if the torque limit value is not exceeded, determining that the current generating power is smaller than the preset power threshold value.
In this embodiment, the adjusting system further includes: the parameter obtaining module 15 is configured to obtain a historical rotation speed of the wind turbine generator and a historical electromagnetic torque corresponding to the historical rotation speed within a historical time period, where the historical time period is a time period in which the generated power exceeds the preset power threshold;
and a boundary curve generating module 16, configured to generate a boundary curve corresponding to the historical time period according to the historical rotation speed and the historical electromagnetic torque, so as to serve as the preset power boundary curve.
In this embodiment, the wind speed can be obtained by an anemometer, the rotating speed can be obtained by a rotating speed sensor, and the torque can be directly output or displayed by a converter.
The generated power adjusting system of the wind turbine generator system provided by the embodiment can apply the historical operating state of the wind turbine generator system to the detection of the current power exceeding or not when operating, so that the detection result is closer to the actual operation, the detection precision is improved, and the accuracy of power adjustment is further enhanced.
Example 5
The present invention further provides an electronic device, as shown in fig. 6, the electronic device may include a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the steps of the method for adjusting the generated power of the wind turbine generator in the foregoing embodiment 1 or 2.
It should be understood that the electronic device shown in fig. 6 is only an example, and should not bring any limitation to the functions and the scope of the application of the embodiments of the present invention.
As shown in fig. 6, the electronic device 2 may be embodied in the form of a general purpose computing device, such as: which may be a server device. The components of the electronic device 2 may include, but are not limited to: the at least one processor 3, the at least one memory 4, and a bus 5 connecting the various system components (including the memory 4 and the processor 3).
The bus 5 may include a data bus, an address bus, and a control bus.
The memory 4 may include volatile memory, such as Random Access Memory (RAM)41 and/or cache memory 42, and may further include Read Only Memory (ROM) 43.
The memory 4 may also include a program tool 45 (or utility tool) having a set (at least one) of program modules 44, such program modules 44 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The processor 3 executes various functional applications and data processing, such as the steps of the method for adjusting the generated power of the wind turbine generator in the foregoing embodiment 1 or 2 of the present invention, by executing the computer program stored in the memory 4.
The electronic device 2 may also communicate with one or more external devices 6 (e.g., keyboard, pointing device, etc.), such communication may be through input/output (I/O) interfaces 7, and the model-generated electronic device 2 may also communicate with one or more networks (e.g., a local area network L AN, a wide area network WAN, and/or a public network) through a network adapter 8.
As shown in FIG. 6, the network adapter 8 may communicate with other modules of the model-generated electronic device 2 via the bus 5. It will be appreciated by those skilled in the art that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the model-generated electronic device 2, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.
It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module according to embodiments of the invention. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.
Example 4
The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor, implements the steps of the adjusting method of the generated power of the wind turbine generator in the foregoing embodiment 1 or 2.
More specific ways in which the computer-readable storage medium may be employed may include, but are not limited to: a portable disk, a hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.
In a possible implementation, the present invention can also be implemented in the form of a program product, which includes program code for causing a terminal device to execute the steps of implementing the method for adjusting the generated power of a wind turbine generator set in the foregoing embodiment 1 or 2 when the program product is run on the terminal device.
Where program code for carrying out the invention is written in any combination of one or more programming languages, the program code may execute entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device and partly on a remote device or entirely on the remote device.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (16)
1. A method for adjusting the generated power of a wind turbine generator is characterized by comprising the following steps:
acquiring a current wind speed;
calculating the current turbulence intensity according to the current wind speed;
if the current turbulence intensity exceeds a preset critical turbulence intensity, detecting whether the current generating power of the wind turbine generator exceeds a preset power threshold value;
and if the power exceeds the preset power threshold, reducing the generated power by reducing the electromagnetic torque of the wind turbine generator.
2. The method of adjusting power generation of a wind turbine according to claim 1,
the step of detecting whether the current generating power of the wind turbine generator exceeds a preset power threshold value comprises the following steps:
acquiring the current rotating speed of the wind turbine generator and the current electromagnetic torque corresponding to the current rotating speed;
judging whether the current electromagnetic torque exceeds a torque limit value or not by referring to a preset power boundary curve, wherein the torque limit value is indicated by the power boundary curve, and when the generated power does not exceed the preset power threshold value, the maximum electromagnetic torque value corresponding to the current rotating speed is judged;
if the current generated power exceeds the torque limit value, determining that the current generated power exceeds a preset power threshold value;
and if the torque limit value is not exceeded, determining that the current generating power is smaller than the preset power threshold value.
3. The method of adjusting power generation of a wind turbine according to claim 2,
the obtaining of the current wind speed further comprises:
acquiring historical rotating speed of the wind turbine generator set in a historical time period and historical electromagnetic torque corresponding to the historical rotating speed, wherein the historical time period is a time period when the generated power exceeds the preset power threshold;
and generating a boundary curve corresponding to the historical time period according to the historical rotating speed and the historical electromagnetic torque to serve as the preset power boundary curve.
4. The method of adjusting power generation of a wind turbine according to claim 1,
the method further comprises the following steps of before acquiring the current wind speed: acquiring historical wind speed corresponding to a historical time period, wherein the historical time period is a time period when the generated power exceeds the preset power threshold;
and calculating the preset critical turbulence intensity by using the historical wind speed.
5. The method of adjusting power generation of a wind turbine according to claim 1,
after the reducing the generated power by reducing the electromagnetic torque of the wind turbine generator, the method further comprises the following steps:
acquiring the actual wind speed after the generated power is continuously reduced for a preset time;
calculating actual turbulence intensity by using the actual wind speed;
detecting whether the actual turbulence intensity is smaller than the preset critical turbulence intensity;
if so, adjusting the wind turbine generator to an original operation state, wherein the original operation state is the state before the generated power of the wind turbine generator is reduced;
and if not, controlling the wind turbine generator to operate in the state after the generated power is reduced.
6. The method of adjusting power generation of a wind turbine according to claim 4, wherein the historical period of time includes a plurality of time intervals;
the acquiring of the historical wind speed corresponding to the historical time period comprises:
acquiring historical wind speeds in a plurality of time intervals;
the calculating the preset critical turbulence intensity by using the historical wind speed comprises the following steps:
respectively calculating the turbulence intensity corresponding to each time interval by using the historical wind speed in each time interval;
and calculating the average value of the turbulence intensities corresponding to the plurality of time intervals to serve as the preset critical turbulence intensity.
7. The method for adjusting the generated power of a wind turbine according to any one of claims 1 to 6, wherein the wind turbine comprises a converter;
the step of reducing the generated power by reducing the electromagnetic torque of the wind turbine generator includes:
and controlling the converter to reduce the electromagnetic torque of the wind turbine generator so as to reduce the generated power.
8. A regulation system of the power generation of a wind turbine, characterized in that it comprises:
the wind speed acquisition module is used for acquiring the current wind speed;
the turbulence intensity calculating module is used for calculating the current turbulence intensity according to the current wind speed;
the detection module is used for detecting whether the current generating power of the wind turbine generator exceeds a preset power threshold value or not when the current turbulence intensity exceeds a preset critical turbulence intensity;
the adjusting module is used for reducing the generated power by reducing the electromagnetic torque of the wind turbine generator when the current generated power exceeds a preset power threshold value.
9. The system for regulating power generation of a wind turbine according to claim 8,
the detection module is used for acquiring the current rotating speed of the wind turbine generator and the current electromagnetic torque corresponding to the current rotating speed; judging whether the current electromagnetic torque exceeds a torque limit value or not by referring to a preset power boundary curve, wherein the torque limit value is indicated by the power boundary curve, and when the generated power does not exceed the preset power threshold value, the maximum electromagnetic torque value corresponding to the current rotating speed is judged; if the current generated power exceeds the torque limit value, determining that the current generated power exceeds a preset power threshold value; and if the torque limit value is not exceeded, determining that the current generating power is smaller than the preset power threshold value.
10. The system for regulating power generation of a wind turbine according to claim 9,
the conditioning system further comprises:
the parameter acquisition module is used for acquiring historical rotating speed of the wind turbine generator set in a historical time period and historical electromagnetic torque corresponding to the historical rotating speed, wherein the historical time period is a time period when the generated power exceeds the preset power threshold;
and the boundary curve generating module is used for generating a boundary curve corresponding to the historical time period according to the historical rotating speed and the historical electromagnetic torque to serve as the preset power boundary curve.
11. The system for regulating power generation of a wind turbine according to claim 8,
the wind speed acquisition module is further used for acquiring historical wind speeds corresponding to historical time periods, wherein the historical time periods are time periods when the generated power exceeds the preset power threshold;
the turbulence intensity calculating module is further used for calculating the preset critical turbulence intensity by using the historical wind speed.
12. The system for regulating power generation of a wind turbine according to claim 8,
the wind speed acquisition module is further used for acquiring the actual wind speed after the generated power is continuously reduced for a preset time after the generated power is reduced;
the turbulence intensity calculating module is also used for calculating the actual turbulence intensity by utilizing the actual wind speed;
the detection module is further used for detecting whether the actual turbulence intensity is smaller than the preset critical turbulence intensity;
if so, the adjusting module is further used for adjusting the wind turbine generator to an original operation state, wherein the original operation state is a state before the generated power of the wind turbine generator is reduced;
and if not, the adjusting module is also used for controlling the wind turbine generator to operate in the state after the generated power is reduced.
13. The system for regulating power generation of a wind turbine according to claim 11, wherein the historical period of time includes a plurality of time intervals;
the wind speed acquisition module is used for acquiring historical wind speeds in a plurality of time intervals;
the turbulence intensity calculation module is used for calculating the turbulence intensity corresponding to each time interval by using the historical wind speed in each time interval; and calculating the average value of the turbulence intensities corresponding to the plurality of time intervals to serve as the preset critical turbulence intensity.
14. The system for regulating power generation of a wind turbine as claimed in claim 8, wherein said wind turbine includes a converter;
the adjusting module reduces the electromagnetic torque of the wind turbine generator by controlling the converter so as to reduce the generated power.
15. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method for adjusting the power generated by a wind turbine according to any of claims 1 to 7 when executing the computer program.
16. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of regulating the power generation of a wind turbine according to any one of claims 1 to 7.
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| CN202010287058.4A CN111456898A (en) | 2020-04-13 | 2020-04-13 | Method, system, medium and electronic device for adjusting generated power of wind turbine generator |
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| CN202010287058.4A CN111456898A (en) | 2020-04-13 | 2020-04-13 | Method, system, medium and electronic device for adjusting generated power of wind turbine generator |
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Application publication date: 20200728 |