Wind power generation system and operation control method thereof

Abstract

The invention relates to the technical field of wind power generation, in particular to a wind power generation system and a control method thereof.The wind power generation system comprises a power module, a transmission module, a power generation module, a detection module, a sound driving module and an analysis module; the specific condition of wind power generation is determined, the operation parameters of the wind power generation system are automatically controlled according to the obtained electric quantity parameters, and the power generation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly to a wind power generation system and a control method thereof. Background Art

[0002] Wind power generation is a renewable energy technology that converts the kinetic energy of wind into electrical energy. Modern wind power generation originated from the energy crisis at the end of the 20th century and the rise of environmental protection awareness. With the dependence on traditional fossil fuels and concerns about global greenhouse gas emissions, wind power generation, as a clean and renewable energy option, has gradually gained importance. The development of wind turbines has grown rapidly. In recent years, with continuous technological progress and cost reduction, wind power generation has become one of the most important renewable energies globally. Many countries are vigorously developing wind power generation, which not only provides a reliable alternative for energy supply but also has a positive significance for reducing carbon emissions and addressing climate change.

[0003] Chinese Patent Publication No.: CN117569976A, discloses a wind power generation device and a wind power generation system, including: a tower barrel, a first box body is fixedly connected to the upper end of the tower barrel, a vertical pillar is rotatably connected to the upper end of the first box body, a first turntable is fixedly connected to the upper end of the vertical pillar, a first horizontal lower bracket is fixedly connected to the periphery of the first turntable at equal intervals, the other end of the first horizontal lower bracket is fixedly connected to a first fixing plate, the lower part of a rotating shaft fixedly penetrates through the center of the first turntable and then extends into the first box body, grooves are arranged at upper and lower intervals on the upper part of the rotating shaft, one end of a second horizontal bracket is fixedly connected to the groove, an inner spiral blade is connected between two relatively upper and lower second horizontal brackets, a transmission component is fixedly connected to the lower part of the rotating shaft, the transmission component is fixedly connected to a generator, and the generator is located in the first box body; It can be seen that the above technical solution has the following problems: It is impossible to automatically control the operating parameters of the wind power generation system according to the specific situation of the generated electricity, which affects the power generation efficiency. Summary of the Invention

[0004] Therefore, the present invention provides a wind power generation system and a control method thereof to overcome the problem in the prior art that the operating parameters of the wind power generation system cannot be automatically controlled according to the specific situation of the generated electricity, which affects the power generation efficiency.

[0005] On the one hand, the present invention provides a wind power generation system, including: A power module, which includes a plurality of blades and a wind wheel shaft connected to each blade for integrating and transmitting rotational mechanical energy; A transmission module, which includes a speed gearbox connected to the output shaft of the wind wheel shaft for increasing the speed of the output shaft of the wind wheel shaft; A power generation module, which includes a generator whose input shaft is connected to the transmission module for converting mechanical energy into electrical energy; A detection module, comprising a power quality detector provided at the output end of the generator for detecting output power and an anemometer for detecting wind speed; A sound repelling module, which is used to emit a sound of a specific frequency to repel birds; an analysis module, which is respectively connected to the power module, the transmission module, the sound driving module and the detection module, and is used to determine whether the operating condition of the power module is qualified based on the output power and wind speed; and when it is determined that the operating condition of the power module is abnormal, determine the abnormality proportion parameter based on the drawn power time domain curve; and determine the processing method for the power module based on the abnormality proportion parameter, including adjusting the angle of each blade to a corresponding value, adjusting the loudness of the sound output by the sound driving module to a corresponding value, or re-determining the speed ratio of the generator and the wind wheel shaft.

[0006] Furthermore, the analysis module is used to periodically determine whether the operating status of the power module is qualified based on the electric energy outputted by the generator output terminal, including: If the electric energy is less than or equal to the first preset electric energy, it is determined that the operating status of the power module is abnormal, and a processing method for the power module is determined based on the abnormality ratio parameter; If the electric energy is less than or equal to the second preset electric energy and greater than the first preset electric energy, determining whether the operating condition of the power module is qualified in combination with the wind speed; If the electric energy is greater than the second preset electric energy, it is determined that the operating condition of the power module is qualified, and the power module is controlled to continue to operate using the current operating parameters.

[0007] Furthermore, the analysis module is used to determine whether the operating condition of the power module is qualified in combination with the wind speed, including: If the wind speed is less than or equal to the preset wind speed, the power module is judged to be in good operating condition and the angle of each blade is adjusted to the corresponding value based on the wind speed; If the wind speed is greater than the preset wind speed, it is determined that the operating condition of the power module is abnormal, and a processing method for the power module is determined based on the abnormality ratio parameter.

[0008] Furthermore, the analysis module is used to adjust the angle of each blade to a corresponding value based on the wind speed, wherein: The increase in the angle of each blade determined based on the wind speed is inversely proportional to the wind speed.

[0009] Furthermore, the analysis module is used to determine the abnormality ratio parameter, including: Used to draw an electric energy time domain curve based on the electric energy of each cycle obtained from historical data; Calculate the average value of the electric energy time domain curve, and mark the area where the electric energy is lower than the average value in the electric energy time domain curve as an abnormal area; Obtain the time of each abnormal area and the ratio of the time to the total time of the electric energy time domain curve to obtain the abnormal ratio parameter; The analysis module is used to determine the processing method for the power module based on the abnormal ratio parameter, including: If the abnormal ratio parameter is less than or equal to the first preset ratio, adjust the sound loudness output by the sound driving module to the corresponding value based on the abnormal ratio parameter; If the abnormal ratio parameter is less than or equal to the second preset ratio and greater than the first preset ratio, determine the processing method for the power module in combination with the abnormal interval difference parameter; If the abnormal ratio parameter is greater than the second preset ratio, adjust the speed ratio of the generator and the wind turbine shaft to the corresponding value based on the electric energy.

[0010] Further, the analysis module is used to adjust the sound loudness output by the sound driving module to the corresponding value based on the abnormal ratio parameter, where: The increase amplitude of the sound loudness determined based on the abnormal ratio parameter is inversely proportional to the abnormal ratio parameter; The analysis module is used to adjust the speed ratio of the generator and the wind turbine shaft to the corresponding value based on the electric energy, where: The increase amplitude of the speed ratio determined based on the electric energy is inversely proportional to the electric energy.

[0011] Further, the analysis module is used to determine the processing method for the power module in combination with the abnormal interval difference parameter, including: Used to determine the abnormal interval difference parameter, obtain the time intervals between abnormal areas in the electric energy time domain curve, and solve the variance of each time interval to obtain the abnormal interval difference parameter; If the abnormal interval difference parameter is less than or equal to the preset abnormal interval difference parameter, adjust the speed ratio of the generator and the wind turbine shaft to the corresponding value based on the electric energy; If the abnormal interval difference parameter is greater than the preset abnormal interval difference parameter, adjust the angles of each blade to the corresponding values based on the wind speed.

[0012] Further, under the condition that the analysis module completes the adjustment of the speed ratio, re-determine whether the operating condition of the power module is qualified based on the electric energy. If the electric energy is less than or equal to the second preset electric energy, adjust the first preset electric energy and the second preset electric energy to the corresponding values based on the abnormal interval difference parameter; if the electric energy is greater than the second preset electric energy, determine that the operating condition of the power module is qualified, and control the power module to continue operating with the current operating parameters.

[0013] Further, the analysis module is used to adjust the first preset electric energy and the second preset electric energy to the corresponding values based on the abnormal interval difference parameter, where: The reduction amplitudes of the first preset electric energy and the second preset electric energy determined based on the abnormal interval difference parameter are inversely proportional to the abnormal interval difference parameter.

[0014] On the other hand, the present invention also provides a control method for controlling the above wind power generation system, including: Periodically obtain the electric energy output at the output end of the generator; Draw an electric energy time-domain curve based on the electric energy obtained in each period; Obtain an abnormal proportion parameter and an abnormal interval difference parameter based on the electric energy time-domain curve; Record historical data, and record the electric energy, the electric energy time-domain curve, the abnormal proportion parameter, and the abnormal interval difference parameter obtained at each time node respectively; Determine whether the operating condition of the power module is qualified based on the electric energy and the wind speed, and when it is determined that the operating condition of the power module is abnormal, determine the processing method for the power module based on the abnormal proportion parameter, including adjusting the angles of the blades to corresponding values, adjusting the sound loudness output by the sound driving module to corresponding values, or re-determining the speed ratio of the generator and the wind turbine shaft.

[0015] Compared with the prior art, the beneficial effect of the present invention is that it monitors the process of wind power generation to obtain a number of monitoring data, determines the specific situation of wind power generation based on the obtained electric energy output by the generator, and automatically controls the operating parameters of the wind power generation system according to the obtained electric energy parameters, improving the power generation efficiency.

[0016] Furthermore, monitor the specific situation of wind power generation based on the obtained electric energy. When the electric energy is greater than the second preset electric energy, it can be determined that the operating condition of the power module is qualified only based on the electric energy; when the electric energy is less than or equal to the second preset electric energy and greater than the first preset electric energy, it is not possible to make an arbitrary judgment on the operating condition of the power module only based on the electric energy. In this case, the wind speed is combined to comprehensively determine whether the operating condition of the power module is qualified. When the wind speed is less than or equal to the preset wind speed, since the output electric energy is low due to objective environmental reasons in this case, it is determined that the operating condition of the power module is qualified, and the angles of the blades are adjusted to improve the electric energy output, further improving the power generation efficiency.

[0017] Furthermore, when it is determined that the operating condition of the power module is abnormal, an abnormal proportion parameter is obtained, which characterizes the proportion of abnormal power output. When the abnormal proportion parameter is less than or equal to the first preset proportion, the phenomenon of low output power only occurs occasionally. At this time, the output power is irregularly low due to bird interference, and the sound loudness output by the sound driving away module is adjusted to drive away birds with different sensitivities; when the abnormal proportion parameter is greater than the second preset proportion, in this case, the wind power generation is in a state of low output power most of the time. At this time, the speed ratio is increased to make the generator run at a higher speed under the same wind speed conditions, thereby generating more electricity per unit time and improving power generation efficiency. While ensuring the balanced operation of the generator and the wind wheel shaft, the stability of the power module operation is further guaranteed, and the power module is guaranteed to generate continuous and stable power.

[0018] Furthermore, when the abnormality proportion parameter is less than or equal to the second preset proportion and greater than the first preset proportion, a processing method for the power module is determined in combination with the abnormality interval difference parameter. The abnormality interval difference parameter characterizes the degree of discreteness of the time intervals between each abnormal area. When the abnormality interval difference parameter is less than or equal to the preset abnormality interval difference parameter, the sizes of the time intervals are relatively uniform in this case, and the abnormal areas appear in a regular pattern. When the abnormal areas are regularly distributed, it is determined that the transmission abnormality causes unstable operation of the transmission module, resulting in vibration and noise problems, resulting in intermittent energy loss, causing the power output to be periodically low. In this case, the speed ratio of the generator and the wind rotor shaft is adjusted. By increasing the speed ratio, the transmission module operates more smoothly, reduces vibration and noise, and thus reduces energy loss. When the abnormality interval difference parameter is greater than the preset abnormality interval difference parameter, in this case, irregular abnormal intervals occur in wind power generation. At this time, the output power is too low due to abnormal blade angles. In this case, the angles of each blade are adjusted. The corresponding processing method is selected according to the specific situation of wind power generation to automatically adjust the operating parameters of the power module, while ensuring the stability of the power module operation and further improving the power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a module block diagram of a wind power generation system according to an embodiment of the present invention; Figure 2 This is a flowchart of the steps of the operation control method of the wind power generation system according to an embodiment of the present invention; Figure 3 This is a logic determination diagram for determining whether the operating status of the power module is qualified based on the electric energy output by the generator output terminal by the analysis module in an embodiment of the present invention; Figure 4 This is a logic decision diagram for the analysis module of an embodiment of the present invention to determine whether the operating status of the power module is qualified based on the wind speed. Detailed Implementation Modes

[0020] In order to make the objectives and advantages of the present invention more clearly understood, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The preferred implementation modes of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation modes are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0022] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0023] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] Please refer to Figure 1 as shown, which is a block diagram of the wind power generation system according to an embodiment of the present invention. The wind power generation system of the present invention includes: A power module, which includes a plurality of blades and a wind wheel shaft connected to each blade for integrating and transmitting rotational mechanical energy; A transmission module, which includes a speed gearbox connected to the output shaft of the wind wheel shaft for increasing the rotational speed of the output shaft of the wind wheel shaft; A power generation module, which includes a generator whose input shaft is connected to the transmission module for converting mechanical energy into electrical energy; A detection module, which includes a power quality detector arranged at the output end of the generator for detecting the quality of the output electrical energy and an anemometer for detecting the wind speed; A sound repelling module, which is used to emit a specific frequency sound to repel birds; an analysis module, which is respectively connected to the power module, the transmission module, the sound driving module and the detection module, and is used to determine whether the operating condition of the power module is qualified based on the output power and wind speed; and when it is determined that the operating condition of the power module is abnormal, determine the abnormality proportion parameter based on the drawn power time domain curve; and determine the processing method for the power module based on the abnormality proportion parameter, including adjusting the angle of each blade to a corresponding value, adjusting the loudness of the sound output by the sound driving module to a corresponding value, or re-determining the speed ratio of the generator and the wind wheel shaft.

[0025] Specifically, the specific structure of the gearbox is not limited. The speed can be increased by combining gears of different sizes, and the torque can be transmitted and changed at the same time. It can be understood that the generator can operate stably within the corresponding working speed range. This is an existing technology and will not be repeated here.

[0026] Specifically, the angle of each blade can be adjusted by controlling a pitch controller connected to the blade. This is existing technology and will not be described in detail.

[0027] Specifically, the operation process of wind power generation is monitored to obtain a number of monitoring data. Based on the obtained electric energy output by the generator, the specific situation of wind power generation is determined, and the operating parameters of the wind power generation system are automatically controlled according to the obtained electric energy parameters, thereby improving the power generation efficiency.

[0028] See also Figure 2 , which is a flowchart of the steps of the operation control method of the wind power generation system according to an embodiment of the present invention. The operation control method of the wind power generation system according to the present invention includes: S1, periodically obtains the electrical energy output from the generator output terminal; S2, drawing a time domain curve of electric energy based on the electric energy obtained in each cycle; S3, obtaining an abnormal proportion parameter and an abnormal interval difference parameter based on the electric energy time domain curve; S4, record historical data, and record the electric energy, electric energy time domain curve, abnormal proportion parameter and abnormal interval difference parameter obtained at each time node respectively; S5, determining whether the operating condition of the power module is qualified based on the electric energy and wind speed, and when it is determined that the operating condition of the power module is abnormal, determining the processing method for the power module based on the abnormal proportion parameter, including adjusting the angle of each blade to a corresponding value, adjusting the loudness of the sound output by the sound driving module to a corresponding value, or re-determining the speed ratio of the generator and the wind wheel shaft.

[0029] See also Figure 3As shown, it is a logic decision diagram for the analysis module of the embodiment of the present invention to determine whether the operating condition of the power module is qualified based on the electric energy output at the output end of the generator. The analysis module of the present invention is used to periodically determine whether the operating condition of the power module is qualified based on the electric energy output at the output end of the generator, including: If the electric energy is less than or equal to the first preset electric energy, it is determined that the operating condition of the power module is abnormal, and the processing method for the power module is determined based on the abnormal proportion parameter; If the electric energy is less than or equal to the second preset electric energy and greater than the first preset electric energy, the running condition of the power module is determined in combination with the wind speed; If the electric energy is greater than the second preset electric energy, it is determined that the operating condition of the power module is qualified, and the power module is controlled to continue operating with the current operating parameters.

[0030] Specifically, the first preset electric energy N1 is selected within the range [0.58Q0, 0.66Q0], and the second preset electric energy N2 is selected within the range [0.87Q0, 0.93Q0], where Q0 is the average value of each electric energy in the historical data.

[0031] Please refer to Figure 4 As shown, it is a logic decision diagram for the analysis module of the embodiment of the present invention to determine whether the operating condition of the power module is qualified based on the wind speed. The analysis module of the present invention is used to determine whether the operating condition of the power module is qualified in combination with the wind speed, including: If the wind speed is less than or equal to the preset wind speed, it is determined that the operating condition of the power module is qualified, and the angles of the blades are adjusted to corresponding values based on the wind speed; If the wind speed is greater than the preset wind speed, it is determined that the operating condition of the power module is abnormal, and the processing method for the power module is determined based on the abnormal proportion parameter. Specifically, the preset wind speed F0 is selected within the range [0.44S0, 0.7S0], where S0 is the average value of each wind speed obtained at each time node in the historical data.

[0032] Specifically, the specific situation of wind power generation is monitored according to the obtained electric energy. When the electric energy is greater than the second preset electric energy, it can be determined that the operating condition of the power module is qualified only based on the electric energy; when the electric energy is less than or equal to the second preset electric energy and greater than the first preset electric energy, it is impossible to make an arbitrary judgment on the operating condition of the power module only based on the electric energy. In this case, the running condition of the power module is determined comprehensively in combination with the wind speed. When the wind speed is less than or equal to the preset wind speed, in this case, due to objective environmental reasons, the output electric energy is low, it is determined that the operating condition of the power module is qualified, and the angles of the blades are adjusted to improve the electric energy output and further improve the power generation efficiency.

[0033] Specifically, the analysis module is used to adjust the angles of the blades to corresponding values based on the wind speed, where: The increase in the angle of each blade determined based on the wind speed is inversely proportional to the wind speed.

[0034] In this embodiment, optionally, Comparing the wind speed with a first preset wind speed comparison threshold and a second preset wind speed comparison threshold; If the wind speed is less than or equal to the first preset wind speed comparison threshold, the angle of each blade is adjusted to 1.27 times the initial angle; If the wind speed is less than or equal to the second preset wind speed comparison threshold and greater than the first preset wind speed comparison threshold, adjust the angle of each blade to 1.17 times the initial angle; If the wind speed is greater than the second preset wind speed comparison threshold, the angle of each blade is adjusted to 1.11 times the initial angle; The first preset wind speed ratio threshold is 0.2F0, and the second preset wind speed ratio threshold is 0.6F0.

[0035] Specifically, the analysis module is used to determine the abnormality ratio parameter, including: Used to draw an electric energy time domain curve based on the electric energy of each cycle obtained from historical data; Calculate the average value of the electric energy time domain curve, and mark the area where the electric energy is lower than the average value in the electric energy time domain curve as an abnormal area; Obtain the time of each abnormal area and the ratio of the total time of the electric energy time domain curve to obtain the abnormal proportion parameter; The analysis module is used to determine a processing method for the power module based on the abnormal proportion parameter, including: If the abnormality ratio parameter is less than or equal to the first preset ratio, the loudness of the sound output by the sound expulsion module is adjusted to a corresponding value based on the abnormality ratio parameter; If the abnormality ratio parameter is less than or equal to the second preset ratio and greater than the first preset ratio, then determining a processing method for the power module in combination with the abnormality interval difference parameter; If the abnormal proportion parameter is greater than the second preset proportion, the speed ratio of the generator and the wind wheel shaft is adjusted to a corresponding value based on the electrical energy.

[0036] Specifically, when it is determined that the operating status of the power module is abnormal, an abnormal proportion parameter is obtained. The abnormal proportion parameter represents the proportion of abnormal power output. When the abnormal proportion parameter is less than or equal to the first preset proportion, the phenomenon of low output power only occurs occasionally. At this time, the output power is irregularly low due to bird interference, and the sound loudness output by the sound driving away module is adjusted to drive away birds with different sensitivities; when the abnormal proportion parameter is greater than the second preset proportion, in this case, the wind power generation is in a state of low output power most of the time. At this time, the speed ratio is increased to make the generator run at a higher speed under the same wind speed conditions, thereby generating more electricity per unit time and improving power generation efficiency. While ensuring the balanced operation of the generator and the wind wheel shaft, the stability of the power module operation is further guaranteed, and the power module is guaranteed to generate power continuously and stably.

[0037] Specifically, the first preset proportion B1 is selected within the interval [0.37, 0.52], and the second preset proportion B2 is selected within the interval [0.64, 0.81].

[0038] Specifically, the analysis module is used to adjust the loudness of the sound output by the sound expulsion module to a corresponding value based on the abnormality ratio parameter, wherein: The increase in the sound loudness determined based on the abnormal proportion parameter is inversely proportional to the abnormal proportion parameter; The analysis module is used to adjust the speed ratio of the generator and the wind rotor shaft to a corresponding value based on the electrical energy, wherein: The increase in the speed ratio determined based on the electric energy is inversely proportional to the electric energy.

[0039] In this embodiment, optionally, Comparing the abnormality ratio parameter with a first preset abnormality comparison threshold and a second preset abnormality comparison threshold; If the abnormality ratio parameter is less than or equal to the first preset abnormality comparison threshold, the sound loudness is adjusted to 1.28 times the initial sound loudness; If the abnormality ratio parameter is less than or equal to the second preset abnormality comparison threshold and greater than the first preset abnormality comparison threshold, the sound loudness is adjusted to 1.19 times the initial sound loudness; If the abnormality ratio parameter is greater than the second preset abnormality comparison threshold, the sound loudness is adjusted to 1.11 times the initial sound loudness; The first preset abnormality comparison threshold is 0.7B1, and the second preset abnormality comparison threshold is 0.8B1.

[0040] In this embodiment, optionally, Comparing the electric energy with a first preset electric energy comparison threshold and a second preset electric energy comparison threshold, If the electric energy is less than or equal to the first preset electric energy comparison threshold, adjust the speed ratio to 1.26 times the initial speed ratio; If the electric energy is less than or equal to the second preset electric energy comparison threshold and greater than the first preset electric energy comparison threshold, adjust the speed ratio to 1.19 times the initial speed ratio; If the electric energy is greater than the second preset electric energy comparison threshold, adjust the speed ratio to 1.13 times the initial speed ratio; The first preset electric energy comparison threshold is taken as 0.25N1, and the second preset electric energy comparison threshold is taken as 0.5N1.

[0041] Specifically, the adjustment method of the speed ratio is not limited. The speed ratio can be adjusted by adjusting the speed gearbox to change the sizes and combination modes of the gears in the speed gearbox, which will not be elaborated here.

[0042] Specifically, the analysis module is used to determine the processing method for the power module in combination with the abnormal interval difference parameter, including: Used to determine the abnormal interval difference parameter, obtain the time intervals between the abnormal regions in the electric energy time-domain curve, and solve the variance of each time interval to obtain the abnormal interval difference parameter; If the abnormal interval difference parameter is less than or equal to the preset abnormal interval difference parameter, adjust the speed ratio of the generator and the wind turbine shaft to the corresponding value based on the electric energy; If the abnormal interval difference parameter is greater than the preset abnormal interval difference parameter, adjust the angles of the blades to the corresponding values based on the wind speed.

[0043] Specifically, the preset abnormal interval difference parameter G0 is selected within the interval [0.13Y0, 0.21Y0], where Y0 is the average value of the time intervals between the abnormal regions.

[0044] Specifically, when the abnormal proportion parameter is less than or equal to the second preset proportion and greater than the first preset proportion, the processing method for the power module is determined in combination with the abnormal interval difference parameter. The abnormal interval difference parameter characterizes the degree of dispersion of the time intervals between abnormal regions. When the abnormal interval difference parameter is less than or equal to the preset abnormal interval difference parameter, in this case, the sizes of the time intervals are relatively average, and the occurrence of abnormal regions has a pattern. When the abnormal regions are regularly distributed, it is determined that the operation of the transmission module is unstable due to abnormal transmission, resulting in vibration and noise problems, so that intermittent energy loss occurs, making the power output show a periodic and regular low value. At this time, the speed ratio of the generator and the wind turbine shaft is adjusted. By increasing the speed ratio, the operation of the transmission module becomes more stable, reducing vibration and noise, so as to reduce energy loss; when the abnormal interval difference parameter is greater than the preset abnormal interval difference parameter, in this case, there are irregular abnormal intervals in wind power generation. At this time, the output power is too low due to abnormal blade angles. At this time, the angles of the blades are adjusted, and the corresponding processing method is selected according to the specific situation of wind power generation to automatically adjust the operating parameters of the power module, while ensuring the stability of the operation of the power module, further improving the power generation efficiency.

[0045] Specifically, under the condition that the analysis module has completed the adjustment of the speed ratio, it re-determines whether the operation status of the power module is qualified based on the electric energy. If the electric energy is less than or equal to the second preset electric energy, the first preset electric energy and the second preset electric energy are adjusted to corresponding values based on the abnormal interval difference parameter; if the electric energy is greater than the second preset electric energy, it is determined that the operation status of the power module is qualified, and the power module is controlled to continue to operate with the current operating parameters.

[0046] Specifically, the analysis module is used to adjust the first preset electric energy and the second preset electric energy to corresponding values based on the abnormal interval difference parameter, where: The reduction amplitudes of the first preset electric energy and the second preset electric energy determined based on the abnormal interval difference parameter are inversely proportional to the abnormal interval difference parameter.

[0047] In this embodiment, optionally, Compare the abnormal interval difference parameter with the first preset interval comparison threshold and the second preset interval comparison threshold; If the abnormal interval difference parameter is less than or equal to the first preset interval comparison threshold, the first preset electric energy is adjusted to 0.72 times the initial first preset electric energy, and the second preset electric energy is adjusted to 0.72 times the initial second preset electric energy; If the abnormal interval difference parameter is less than or equal to the second preset interval comparison threshold and greater than the first preset interval comparison threshold, the first preset electric energy is adjusted to 0.82 times the initial first preset electric energy, and the second preset electric energy is adjusted to 0.83 times the initial second preset electric energy; If the abnormal interval difference parameter is greater than the second preset interval comparison threshold, adjust the first preset electric energy to 0.91 times the initial first preset electric energy, and adjust the second preset electric energy to 0.92 times the initial second preset electric energy; The first preset interval comparison threshold is taken as 0.77G0, and the second preset interval comparison threshold is taken as 0.85G0.

[0048] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

[0049] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wind power generation system, characterized in that, include: A power module comprising a plurality of blades and a wind rotor shaft connected to the blades for integrating and transmitting rotational mechanical energy; A transmission module, comprising a speed gearbox connected to the output shaft of the wind rotor shaft and used to increase the speed of the output shaft of the wind rotor shaft; a power generation module, comprising a generator having an input shaft connected to the transmission module for converting mechanical energy into electrical energy; A detection module, comprising a power quality detector provided at the output end of the generator for detecting output power and an anemometer for detecting wind speed; A sound repelling module, which is used to emit a sound of a specific frequency to repel birds; an analysis module, which is respectively connected to the power module, the transmission module, the sound driving module and the detection module, and is used to determine whether the operating condition of the power module is qualified based on the output power and wind speed; and when it is determined that the operating condition of the power module is abnormal, determine the abnormality proportion parameter based on the drawn power time domain curve; and determine the processing method for the power module based on the abnormality proportion parameter, including adjusting the angle of each blade to a corresponding value, adjusting the loudness of the sound output by the sound driving module to a corresponding value, or re-determining the speed ratio of the generator and the wind wheel shaft.

2. The wind power generation system according to claim 1, wherein The analysis module is used to periodically determine whether the operating status of the power module is qualified based on the electric energy output by the generator output terminal, including: If the electric energy is less than or equal to the first preset electric energy, it is determined that the operating status of the power module is abnormal, and a processing method for the power module is determined based on the abnormality ratio parameter; If the electric energy is less than or equal to the second preset electric energy and greater than the first preset electric energy, determining whether the operating condition of the power module is qualified in combination with the wind speed; If the electric energy is greater than the second preset electric energy, it is determined that the operating condition of the power module is qualified, and the power module is controlled to continue to operate using the current operating parameters.

3. The wind power generation system according to claim 2, characterized in that, The analysis module is used to determine whether the operating status of the power module is qualified in combination with the wind speed, including: If the wind speed is less than or equal to the preset wind speed, the power module is judged to be in good operating condition and the angle of each blade is adjusted to the corresponding value based on the wind speed; If the wind speed is greater than the preset wind speed, it is determined that the operating condition of the power module is abnormal, and a processing method for the power module is determined based on the abnormality ratio parameter.

4. The wind power generation system according to claim 3, characterized in that, The analysis module is used to adjust the angle of each blade to a corresponding value based on the wind speed, wherein: The increase in the angle of each blade determined based on the wind speed is inversely proportional to the wind speed.

5. The wind power generation system according to claim 4, characterized in that, The analysis module is used to determine the abnormality ratio parameter, including: Used to draw an electric energy time domain curve based on the electric energy of each cycle obtained from historical data; Calculate the average value of the electric energy time domain curve, and mark the area where the electric energy is lower than the average value in the electric energy time domain curve as an abnormal area; Obtain the time of each abnormal area and the ratio of the total time of the electric energy time domain curve to obtain the abnormal proportion parameter; The analysis module is used to determine a processing method for the power module based on the abnormal proportion parameter, including: If the abnormality ratio parameter is less than or equal to the first preset ratio, the loudness of the sound output by the sound expulsion module is adjusted to a corresponding value based on the abnormality ratio parameter; If the abnormality ratio parameter is less than or equal to the second preset ratio and greater than the first preset ratio, then determining a processing method for the power module in combination with the abnormality interval difference parameter; If the abnormal proportion parameter is greater than the second preset proportion, the speed ratio of the generator and the wind wheel shaft is adjusted to a corresponding value based on the electrical energy.

6. The wind power generation system according to claim 5, characterized in that The analysis module is used to adjust the loudness of the sound output by the sound expulsion module to a corresponding value based on the abnormality ratio parameter, wherein: The increase in the sound loudness determined based on the abnormal proportion parameter is inversely proportional to the abnormal proportion parameter; The analysis module is used to adjust the speed ratio of the generator and the wind rotor shaft to a corresponding value based on the electrical energy, wherein: The increase in the speed ratio determined based on the electric energy is inversely proportional to the electric energy.

7. The wind power generation system according to claim 6, wherein, The analysis module is used to determine a processing method for the power module in combination with the abnormal interval difference parameter, including: It is used to determine the abnormal interval difference parameter, obtain the time interval between each abnormal area in the electric energy time domain curve, and solve the variance of each time interval to obtain the abnormal interval difference parameter; If the abnormal interval difference parameter is less than or equal to the preset abnormal interval difference parameter, the speed ratio of the generator and the wind rotor shaft is adjusted to a corresponding value based on the electric energy; If the abnormal interval difference parameter is greater than the preset abnormal interval difference parameter, the angle of each blade is adjusted to a corresponding value based on the wind speed.

8. The wind power generation system according to claim 7, characterized in that, The analysis module re-determines whether the operating condition of the power module is qualified based on the electric energy after the adjustment of the speed ratio is completed, and if the electric energy is less than or equal to the second preset electric energy, adjusts the first preset electric energy and the second preset electric energy to corresponding values based on the abnormal interval difference parameter; If the electric energy is greater than the second preset electric energy, it is determined that the operating condition of the power module is qualified, and the power module is controlled to continue to operate using the current operating parameters.

9. The wind power generation system according to claim 8, wherein, The analysis module is configured to adjust the first preset power and the second preset power to corresponding values based on the abnormal interval difference parameter, wherein: The reduction ranges of the first preset electric energy and the second preset electric energy determined based on the abnormal interval difference parameter are inversely proportional to the abnormal interval difference parameter.

10. A method for operating and controlling a wind power generation system according to any one of claims 1-9, characterized in that, include: Periodically obtaining electrical energy output from the generator output terminal; Draw the electric energy time domain curve based on the electric energy obtained in each cycle; Obtain abnormal proportion parameters and abnormal interval difference parameters based on the electric energy time domain curve; Record historical data, and record the electric energy, electric energy time domain curve, abnormal proportion parameters and abnormal interval difference parameters obtained at each time node; Determine whether the operating status of the power module is qualified based on the electric energy and wind speed, and when it is determined that the operating status of the power module is abnormal, determine the processing method for the power module based on the abnormal proportion parameter, including adjusting the angle of each blade to a corresponding value, adjusting the loudness of the sound output by the sound driving module to a corresponding value, or re-determining the speed ratio of the generator and the wind wheel shaft.

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