CN119146007A - Small wind driven generator and control system thereof - Google Patents
Small wind driven generator and control system thereof Download PDFInfo
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- CN119146007A CN119146007A CN202411510783.8A CN202411510783A CN119146007A CN 119146007 A CN119146007 A CN 119146007A CN 202411510783 A CN202411510783 A CN 202411510783A CN 119146007 A CN119146007 A CN 119146007A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0276—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling rotor speed, e.g. variable speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- General Engineering & Computer Science (AREA)
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- Control Of Eletrric Generators (AREA)
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Abstract
The application discloses a small wind driven generator and a control system thereof, which belong to the technical field of wind power generation, wherein the small wind driven generator comprises a power generation unit, a control unit and a data interaction unit, the small wind driven generator control system comprises a wind speed monitoring module, a data transmission module, a data analysis module and an execution module, the wind speed monitoring module is used for monitoring real-time wind speed, the data transmission module is used for taking charge of data transmission of the whole control system, the data analysis module is used for analyzing various received data, and the execution module is used for controlling the control unit of the small wind driven generator. In the implementation process of the technical scheme, the wind speed is monitored and then analyzed, and the control unit of the small wind driven generator is controlled through the execution module, so that the high-efficiency stable power generation efficiency can be maintained at different wind speeds, and the damage risk of the wind speed to the blades is reduced.
Description
Technical Field
The application relates to the technical field of wind power generation, in particular to a small wind power generator and a control system thereof.
Background
Along with the consumption of energy, more and more clean energy is developed, wind energy is one of the common clean energy, and wind energy is converted into electric energy by arranging wind generators in a multi-wind area, so that the energy utilization rate is improved, and the carbon emission is reduced.
The wind driven generator is divided into a small wind driven generator and a large wind driven generator according to the scale, wherein the small wind driven generator has the advantages of low cost, simple transportation and installation, off-grid operation and the like, is commonly used in rural, household and other small scenes, the large wind driven generator has the advantages of large scale, grid-connected operation, low-speed power generation and the like, is commonly used in coastline and other large scenes, the type of the wind driven generator is generally required to be reasonably selected according to geographic positions, power generation requirements and the like when the wind driven generator is laid out, the application scale of the small wind driven generator is gradually enlarged along with the improvement of carbon emission requirements, and the small wind driven generator is gradually applied to factories, cities in recent years, so that the voltage force during peak time is relieved, and the electricity consumption cost is reduced.
However, during the application process of the small wind driven generator, there still exist some problems, for example, the scale of the small wind driven generator is that the blades cannot be designed too large, so that the generating efficiency of the small wind driven generator is limited, meanwhile, when the wind speed continuously increases to exceed the design threshold value of the small wind driven generator, the blades are subjected to larger wind pressure and are easy to damage, although the stopping operation can be realized by locking the blades, the generation is paused, the utilization of wind energy is reduced, when the fan is stopped, the blades are still in a static state and still subjected to wind force, the blades may be subjected to larger stress to cause bending damage under strong wind, and how to balance the influence of the wind speed on the blades and improve the generating efficiency becomes the problem that needs to be solved by the small wind driven generator at present.
It is necessary to provide a small wind power generator and a control system thereof to solve the above problems.
It should be noted that the above information disclosed in this background section is only for understanding the background of the inventive concept and, therefore, it may contain information that does not constitute prior art.
Disclosure of Invention
Based on the problems in the prior art, the application aims to provide a small wind driven generator and a control system thereof, which realize high-efficiency adaptation to wind speed fluctuation by optimizing execution signals, thereby reducing the risk of damage to blades and enhancing the stability and reliability of the system while ensuring the power generation efficiency.
The technical scheme adopted by the application for solving the technical problems is that the small wind driven generator control system comprises a power generation unit, a control unit and a data interaction unit, wherein the power generation unit is used for converting wind energy into electric energy, the control unit is used for realizing a control function, and the data interaction unit is used for carrying out data interaction inside and outside the equipment;
The small wind driven generator control system comprises a wind speed monitoring module, a data transmission module, a data analysis module and an execution module, wherein the wind speed monitoring module is used for monitoring real-time wind speed, the data transmission module is used for being responsible for data transmission of the whole control system, the data analysis module is used for analyzing various received data, and the execution module is used for controlling a control unit of the small wind driven generator.
In the implementation process of the technical scheme, the wind speed is monitored and then analyzed, and the control unit of the small wind driven generator is controlled through the execution module, so that the high-efficiency stable power generation efficiency can be maintained at different wind speeds, and the damage risk of the wind speed to the blades is reduced.
Further, the small wind power generator control system operates a method for operating the small wind power generator control system, and the method comprises the following steps:
The data analysis module receives the first wind speed data acquired by the wind speed monitoring module and the operation data of the small wind driven generator, and performs primary analysis on the first wind speed data by combining the operation data of the small wind driven generator to determine a first wind speed interval and a second wind speed interval;
Re-analyzing the received first wind speed data, judging a wind speed interval range within which the current wind speed falls, and generating an execution signal sequence, wherein the execution signal sequence comprises a holding signal and an adjusting signal;
Establishing a hysteresis feedback mechanism, and dynamically matching the data of the wind speed monitoring module and the data of the execution module;
Before the execution device executes the corresponding execution signal, the execution signal is verified, and response deviation is reduced.
Further, the method of determining the first wind speed interval and the second wind speed interval comprises:
Establishing a linear conversion model of wind speed and blade rotation speed, and acquiring a rotation speed power curve of a small wind driven generator;
converting the rotating speed of the blade into wind speed according to the linear conversion model, and obtaining a wind speed power curve according to the rotating speed power curve;
According to the wind speed power curve, a first wind speed section and a second wind speed section are obtained, wherein the left end point of the first wind speed section is the wind speed corresponding to the cutting-in speed of the blade, the right end point is the wind speed when the output power of the small wind driven generator reaches the maximum value, the left end point of the second wind speed section is the wind speed when the output power of the small wind driven generator starts to decline, and the right end point is the maximum wind speed when the small wind driven generator can safely operate.
Further, establishing a linear model of wind speed and blade rotation speed comprises establishing a linear model, respectively obtaining the wind speed and rotation speed at the same moment, establishing a corresponding linear conversion relation, and outputting the corresponding rotation speed or wind speed.
Further, the linear model is a linear regression model.
Further, the holding signal and the adjusting signal are analog signals, and the executing signals in the executing signal sequence have a storage period, and the storage period is consistent with the wind speed change unit.
Further, establishing a hysteresis feedback mechanism and dynamically matching the wind speed monitoring module with the data of the execution module further includes:
dynamically collecting and analyzing the time difference between the wind speed monitoring module and the execution module, and adjusting the storage period of the execution signal sequence;
Optimizing the execution signal, introducing a prediction model, predicting possible wind speed change in a future period of time based on the wind speed change trend, and adjusting the execution signal in advance;
and (3) calibrating the accuracy of the prediction model in real time through a feedback mechanism, and feeding back the accuracy of the prediction of the optimization model through actual wind speed data.
Further, the prediction model is an autoregressive moving average model or a long-term and short-term memory network.
Furthermore, local weather information is accessed into the prediction model, and a prediction algorithm is dynamically adjusted by combining real-time data.
Furthermore, the output of the prediction model is verified by adopting dynamic error analysis and feedback adjustment, and the accuracy of the execution signal is optimized by combining real-time meteorological data and historical wind speed information.
The small wind driven generator and the control system thereof have the beneficial effects that the control unit of the small wind driven generator is controlled through the execution module by monitoring the wind speed and analyzing the wind speed, so that the high-efficiency stable power generation efficiency can be maintained at different wind speeds, and the damage risk of the wind speed to the blades is reduced.
In addition to the objects, features and advantages described above, the present application has other objects, features and advantages. The present application will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.
In the drawings:
FIG. 1 is a schematic diagram of a small wind turbine and its control system;
FIG. 2 is a schematic diagram illustrating steps of a method of operating a control system for a small wind turbine according to the present application;
Fig. 3 is a schematic diagram of a wind speed power curve in accordance with the present application.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
The application provides a small wind driven generator and a control system thereof, as shown in fig. 1, wherein the small wind driven generator consists of a power generation unit, a control unit and a data interaction unit, wherein the power generation unit comprises a tower, a base, a generator, blades and other conventional wind driven generator component parts for converting wind energy into electric energy, and the control unit CAN refer to the prior art, and is used for realizing various control functions, such as adjusting the rotation speed of the blades, the direction of the blades, the output power of the generator and the like, and CAN adopt devices such as a relay, a frequency converter, a servo motor, a steering engine, an inverter and the like, so as to realize various control functions, the data interaction unit is used for carrying out data interaction inside and outside the device, such as transmission of running data of the wind driven generator, acquisition of device control instructions and the like, and the power generation unit, the control unit and the data interaction unit have channels, such as wired or wireless transmission channels, and in the embodiment, without limitation, factors such as cost and stable transmission are comprehensively considered, and wired transmission channels are generally selected in practical application, such as a power line, a serial communication line, a CAN bus, an optical fiber and the like;
The application also provides a control system of the small wind driven generator, which is used for controlling the running process of the small wind driven generator, controlling and optimizing the power generation efficiency, ensuring stable electric energy output under the condition of changeable wind speed, improving the anti-interference capability of the electric power output by reversely regulating and controlling the wind driven generator, simultaneously, monitoring the working state of each part of the wind driven generator in real time, finding and preventing potential faults in time and ensuring the long-term stable running of the wind driven generator system;
the control system of the small wind driven generator comprises the following modules:
the wind speed monitoring module is arranged in the small wind driven generator and is used for monitoring the real-time wind speed and sending the monitored wind speed information to the server;
In the running process of the small wind driven generator, wind Speed monitoring is an indispensable link, because the generator needs to drive the blades to rotate to a certain rotating Speed by wind power to generate electric energy, in practical application, especially for the small wind driven generator, a Cut-in Speed exists in the rotating Speed of the blades, after the Cut-in Speed is reached, the wind driven generator can generate effective electric energy, meanwhile, due to design reasons, the small wind driven generator also has a rated Speed (RATED SPEED), the output power of the wind driven generator is at the maximum value, the rotating Speed of the blades is related to the current wind Speed, theoretically, the higher the wind Speed is, the higher the rotating Speed of the blades is, and in theoretical situations, the higher the rotating Speed of the blades is, namely the rotating Speed of the wind driven blades is, but in practical application, the rotating Speed of the blades needs to be at the rated Speed at each stage as much as possible in consideration of safety, design efficiency, running limitation and the like, so that the power generation efficiency is improved, the risk of damage to the blades is reduced, and the service life is prolonged;
Therefore, the wind speed monitoring module is critical to wind speed monitoring, the wind speed monitoring module is not only required to accurately capture wind speed change, but also is required to work together with the control unit to adjust the running state of the generator in time so as to adapt to the change of wind speed, the wind speed monitoring equipment can be a wind speed measuring instrument or a wind speed sensor, is not limited in the embodiment, and only the current wind speed can be accurately measured;
The data transmission module is used for being responsible for data transmission of the whole control system, ensuring real-time performance and accuracy of information, and comprises collected wind speed data, output power of the generator and working states of all components;
the data transmission module comprises a wired transmission device, such as a power line, a serial communication line, a CAN bus or an optical fiber, and the like, wherein the wired transmission period is connected with transmission interfaces of each module or hardware and adopts the same transmission protocol;
The data analysis module is used for analyzing various received data and generating an execution signal according to an analysis result, wherein the execution signal comprises the steps of adjusting the rotating speed, the blade orientation and the like of the wind driven generator so as to adjust the output power, and meanwhile, the stability and the safety of the system when the wind speed changes are ensured;
the execution module is electrically connected with the data analysis module through a control signal wire, and after receiving a corresponding execution signal, the execution module controls the control unit of the small wind driven generator, wherein the control signal wire adopts a digital signal wire to transmit a switch state or a discontinuous control command, and in the embodiment, the execution signal is a control signal with low voltage (such as 5V or 24V) to realize accurate regulation and control of the wind driven generator.
It should be noted that, the execution module and the data analysis module may also transmit the execution command in a wireless manner, because the execution command signal is usually smaller, the wireless transmission manner can reduce the complexity of the system, reduce the use of cables, and improve the anti-interference capability and flexibility of the overall system while guaranteeing the stability.
As shown in fig. 2, the present application further provides an operation method of a control system of a small wind power generator, which is used for controlling the small wind power generator, and adjusting the output power of the small wind power generator according to different wind speeds, so that the small wind power generator can maintain the maximum generated power output at various wind speeds, and specifically comprises the following steps:
Step 10, a data analysis module receives first wind speed data acquired by a wind speed monitoring module and operation data of a small wind driven generator, and performs primary analysis on the first wind speed data by combining the operation data of the small wind driven generator to determine a first wind speed interval and a second wind speed interval;
After the wind speed monitoring module collects the first wind speed data, the data analysis module receives the first wind speed data through the wired transmission device, meanwhile, the operation data of the small wind driven generator are transmitted simultaneously, the first wind speed data can be analyzed for the first time by combining the first wind speed data and the operation data, and a first wind speed interval and a second wind speed interval are determined, wherein the method for determining the first wind speed interval and the second wind speed interval comprises the following steps:
Step 101, establishing a linear conversion model of wind speed and blade rotation speed, and obtaining a rotation speed power curve of a small wind driven generator;
Because the data collected by the wind speed monitoring module is the current wind speed, and the rotating speed power curve of the small wind driven generator is not directly related to the wind speed, a linear conversion model of the wind speed and the rotating speed of the blades is required to be established, so that the wind speed power curve is obtained according to the rotating speed power curve;
the method comprises the steps of establishing a linear model, respectively acquiring the wind speed and the rotating speed at the same moment, wherein the actual rotating speed is always smaller than the theoretical rotating speed at which the wind speed can drive the blades to rotate due to aerodynamic loss, friction loss and the like, automatically establishing a corresponding linear conversion relation after inputting the wind speed and the rotating speed at a plurality of moments into the linear model, adjusting the linear conversion relation in the linear model in real time along with the continuous increase of data, and automatically outputting the corresponding rotating speed or the wind speed when any wind speed or the rotating speed is input subsequently;
The linear model may be a linear regression model, in particular a simple linear regression model, describing the relationship between an independent variable and a dependent variable, and in particular reference may be made to the prior art, which is not described in detail in this embodiment;
Step 102, converting the rotation speed of the blade into wind speed according to a linear conversion model, and obtaining a wind speed power curve according to the rotation speed power curve;
After the rotating speed of the blade is converted into wind speed through a linear conversion model, a wind speed power curve can be obtained according to the rotating speed power curve, because the wind speed is changeable, and energy losses such as aerodynamic losses, mechanical losses and the like exist between the wind speed and the rotating speed of the blade, the direct relation between the wind speed and the output power of the small-sized wind driven generator cannot be established, and further the output power of the small-sized wind driven generator cannot be adjusted according to the wind speed;
Step 103, acquiring a first wind speed interval and a second wind speed interval according to a wind speed power curve, wherein the left end point of the first wind speed interval is the wind speed corresponding to the cut-in speed of a blade, the right end point is the wind speed when the output power of the small wind driven generator reaches the maximum value, the left end point of the second wind speed interval is the wind speed when the output power of the small wind driven generator starts to decline, and the right end point is the maximum wind speed at which the small wind driven generator can safely operate;
After the wind speed power curve is obtained, the wind speed section can be divided according to the curve, wherein the left end point of the first wind speed section is fixed, the wind speed is the wind speed corresponding to the cutting-in speed of the blade, the right end point is the wind speed when the output power of the small wind driven generator reaches the maximum value, the end point value of the first wind speed section is related to the design parameters of the small wind driven generator, as shown in fig. 3, the schematic diagram of the wind speed power curve is shown, wherein V1 and V2 are the wind speeds when the cutting-in speed and the output power reach the maximum value Pm respectively, V3 is the wind speed when the output power of the small wind driven generator starts to decrease, V4 is the maximum wind speed when the wind speed is V4, and the output power of the small wind driven generator is P4;
Correspondingly, after the wind speed reaches a certain value, the output power of the small wind driven generator enters a descending stage, because the wind driven generator can generate heat, under the condition of overlarge wind speed, the heat generated by the rotating speed of the blades cannot be timely dispersed in a short time, and the temperature of a power generation unit is increased, so that the output power is reduced, a second wind speed interval is divided according to the condition, the left end point of the second wind speed interval is the wind speed corresponding to the beginning of descending of the output power, the right end point of the second wind speed interval is the wind speed corresponding to the maximum rotating speed of the small wind driven generator, and the wind speed intervals are all closed intervals;
step 20, re-analyzing the received first wind speed data, judging a wind speed interval range within which the current wind speed falls, and generating an execution signal sequence, wherein the execution signal sequence comprises a holding signal and an adjusting signal;
After the first wind speed interval and the second wind speed interval are determined, re-analyzing the received first wind speed data to generate an execution signal sequence, wherein the analysis process is to judge whether the current wind speed falls into the first wind speed interval or the second wind speed interval, when the current wind speed falls into the first wind speed interval, the generated execution signal is a maintenance signal, namely the small wind driven generator is not adjusted, because in the first wind speed interval, the small wind driven generator is already in normal power output, when the current wind speed falls into the second wind speed interval, the generated execution signal is an adjustment signal, when the wind speed is in the second wind speed interval, the output power of the small wind driven generator starts to drop, if the current wind speed does not fall into the first wind speed interval, the generation efficiency is influenced, and meanwhile, the service life of the generator is influenced by the increase of the rotation speed of blades caused by the wind speed, and even potential safety hazards are possibly caused;
The holding signal and the adjusting signal are both analog signals, and because the analog signals have the advantages of continuity, high resolution, real-time performance and the like, the method is suitable for the embodiment, and particularly, the adjusting signal comprises a speed control signal of a frequency converter, a phase control signal of an inverter and the like, so that the fan rotating speed is adjusted;
Because the change of the wind speed is in the second level, the execution signals in the execution signal sequence have a storage period, the storage period is consistent with the wind speed change unit, and as long as the wind speed changes, an execution signal is generated, and the small wind driven generator is regulated in real time to ensure that the small wind driven generator always operates in the optimal state.
Step 30, establishing a hysteresis feedback mechanism, and dynamically matching the data of the wind speed monitoring module and the data of the execution module;
Although the storage period in the execution signal sequence is consistent with the wind speed change unit, the responsiveness of the execution module can be improved, and the adjustment lag is reduced, but the processes of data acquisition, transmission, analysis and the like can generate delays, even if the units of the delays are in the millisecond level, the delay feedback mechanism is required to be established when the wind speed is frequently changed and the adjustment effect of the wind driven generator is still possibly influenced, and the data of the wind speed monitoring module and the execution module are calibrated in real time in a dynamic matching mode;
specifically, establishing a hysteresis feedback mechanism and dynamically matching the wind speed monitoring module with the data of the execution module further includes:
Step 301, dynamically collecting and analyzing time difference between a wind speed monitoring module and an execution module, and adjusting a storage period of an execution signal sequence;
The time difference exists between the execution of the execution signals during wind speed monitoring, and the storage period of the execution signals is accurately analyzed and adjusted through dynamic collection of the time difference, so that data between the wind speed monitoring and the execution module is dynamically matched, and adjustment lag caused by the time difference is reduced, for example, the time difference from the time of monitoring a certain wind speed to the time of completing the execution of the execution signals is 0.8 seconds, the storage period of the execution signals can be reduced by 0.8 seconds in an execution signal sequence, and the execution equipment can execute the received execution signals in advance under the same subsequent wind speed, so that the storage period is dynamically shortened or prolonged, and a more accurate adjustment strategy is formed;
step 302, optimizing the execution signal, introducing a prediction model, predicting possible wind speed change in a future period of time according to the wind speed change trend, and adjusting the execution signal in advance;
Besides adjusting the storage period of the execution signal sequence, the execution signal can be directly optimized, a prediction model is introduced, and through analysis of the wind speed change trend, the possible wind speed change in a future period is predicted, and the execution signal is adjusted in advance, so that the wind power generator can respond in advance before the actual wind speed change, and the adjustment lag is further reduced;
The prediction model may be constructed by adopting various existing time series analysis methods, such as an autoregressive moving average model (ARIMA) or a long-short-term memory network (LSTM), based on the historical wind speed data, so as to effectively guide the execution of the advanced adjustment of the signal and enhance the prospective and adaptability of the system, and specific operation steps may refer to the prior art and are not described in detail in this embodiment;
Step 303, calibrating the accuracy of the prediction model in real time through a feedback mechanism, and feeding back the accuracy of model prediction optimization through actual wind speed data;
because the performance of the prediction model depends on factors such as data quantity, model performance and the like, in order to ensure that the error between the predicted wind speed and the actual wind speed is minimized, the prediction process needs to be calibrated in real time, parameters of a prediction algorithm are continuously adjusted, and the generalization capability of the model is improved, so that the model can cope with complex and changeable meteorological conditions;
in addition, the wind speed data accumulated for a long time can be combined to periodically train and optimize the prediction model, so that the accuracy of prediction and the self-adaptive capacity of the system are further improved, a more accurate regulation strategy is provided for the wind driven generator, and efficient and stable energy output is realized;
Besides the algorithm model prediction, local weather information can be accessed, and the prediction algorithm can be dynamically adjusted by combining real-time data, so that the system can follow weather changes, the timeliness and accuracy of the prediction are improved, and the response speed and the adjustment accuracy of the wind driven generator are improved in this way.
Step 40, before the corresponding execution signal is executed by the execution device, the execution signal is verified, and response deviation is reduced.
In order to ensure the accuracy of the execution signals, the output of the prediction model is required to be checked again, the fine verification is carried out before the execution, the execution signals are timely adjusted by comparing the matching degree of the predicted wind speed and the actual wind speed, the synchronization between the response of the wind driven generator and the wind speed change is ensured, the response deviation caused by the prediction error is reduced, and the control precision and the power generation efficiency of the whole system are improved;
Specifically, the output of the prediction model may be verified by adopting dynamic error analysis and feedback adjustment, and the accuracy of the execution signal is optimized by combining real-time meteorological data and historical wind speed information, and the method for performing dynamic error analysis and feedback adjustment in the prior art may be referred to specifically, which is not described in detail in this embodiment.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The control system of the small wind driven generator is characterized by comprising a power generation unit, a control unit and a data interaction unit, wherein the power generation unit is used for converting wind energy into electric energy, the control unit is used for realizing a control function, and the data interaction unit is used for carrying out data interaction inside and outside the equipment;
The small wind driven generator control system comprises a wind speed monitoring module, a data transmission module, a data analysis module and an execution module, wherein the wind speed monitoring module is used for monitoring real-time wind speed, the data transmission module is used for being responsible for data transmission of the whole control system, the data analysis module is used for analyzing various received data, and the execution module is used for controlling a control unit of the small wind driven generator.
2. A small wind power generator control system according to claim 1, wherein the small wind power generator control system operates a method of operating a small wind power generator control system, the method of operating comprising:
The data analysis module receives the first wind speed data acquired by the wind speed monitoring module and the operation data of the small wind driven generator, and performs primary analysis on the first wind speed data by combining the operation data of the small wind driven generator to determine a first wind speed interval and a second wind speed interval;
Re-analyzing the received first wind speed data, judging a wind speed interval range within which the current wind speed falls, and generating an execution signal sequence, wherein the execution signal sequence comprises a holding signal and an adjusting signal;
Establishing a hysteresis feedback mechanism, and dynamically matching the data of the wind speed monitoring module and the data of the execution module;
Before the execution device executes the corresponding execution signal, the execution signal is verified, and response deviation is reduced.
3. The control system of a small wind power generator as set forth in claim 2, wherein the method of determining the first wind speed interval and the second wind speed interval comprises:
Establishing a linear conversion model of wind speed and blade rotation speed, and acquiring a rotation speed power curve of a small wind driven generator;
converting the rotating speed of the blade into wind speed according to the linear conversion model, and obtaining a wind speed power curve according to the rotating speed power curve;
According to the wind speed power curve, a first wind speed section and a second wind speed section are obtained, wherein the left end point of the first wind speed section is the wind speed corresponding to the cutting-in speed of the blade, the right end point is the wind speed when the output power of the small wind driven generator reaches the maximum value, the left end point of the second wind speed section is the wind speed when the output power of the small wind driven generator starts to decline, and the right end point is the maximum wind speed when the small wind driven generator can safely operate.
4. A control system of a small wind driven generator according to claim 3, wherein the building of the linear model of wind speed and blade rotation speed comprises building a linear model, obtaining the wind speed and rotation speed at the same time respectively, building a corresponding linear conversion relation, and outputting the corresponding rotation speed or wind speed.
5. The control system of a small wind turbine of claim 4, wherein the linear model is a linear regression model.
6. The control system of a small wind turbine of claim 5, wherein the hold signal and the adjust signal are analog signals, and wherein the execution signals in the execution signal sequence have a storage period that is consistent with a unit of change in wind speed.
7. The control system of claim 6, wherein establishing a hysteresis feedback mechanism and dynamically matching the wind speed monitoring module to the data of the execution module further comprises:
dynamically collecting and analyzing the time difference between the wind speed monitoring module and the execution module, and adjusting the storage period of the execution signal sequence;
Optimizing the execution signal, introducing a prediction model, predicting possible wind speed change in a future period of time based on the wind speed change trend, and adjusting the execution signal in advance;
and (3) calibrating the accuracy of the prediction model in real time through a feedback mechanism, and feeding back the accuracy of the prediction of the optimization model through actual wind speed data.
8. The control system of a small wind turbine of claim 7, wherein the predictive model is an autoregressive moving average model or a long and short term memory network.
9. The control system of a small wind driven generator according to claim 8, wherein local weather information is accessed in a prediction model, and a prediction algorithm is dynamically adjusted by combining real-time data.
10. The control system of a small wind driven generator according to claim 9, wherein the output of the prediction model is verified by dynamic error analysis and feedback adjustment, and the accuracy of the execution signal is optimized by combining real-time meteorological data with historical wind speed information.
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