Wind turbine flywheel energy storage device and control method and system thereof, electronic equipment and storage medium

Abstract

The invention provides a wind turbine flywheel energy storage device, a control method and system of the wind turbine flywheel energy storage device, electronic equipment and a storage medium, and relates to the technical field of wind power generation energy storage. The generator is sequentially connected with the clutch device and the flywheel rotor through the transmission part; the wind generator main shaft, the generator, the clutch device and the flywheel rotor are respectively in control connection with the controller; the control method comprises the steps of obtaining operation parameters of the wind turbine and the field wind speed in real time, judging the field working condition and controlling the connection relation between a main shaft of the wind turbine and the generator, calculating the wind power fluctuation ratio and the charge state of the flywheel energy storage device, judging the target connection state of the clutch device, and forming and executing a clutch device control instruction. The smoothness of the output power of the wind turbine can be improved, and the wind energy utilization efficiency is improved; the flywheel energy storage device is small in required space, low in cost, high in power density, small in influence of external factors and wide in application.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation and energy storage, and in particular to a wind turbine flywheel energy storage device and a control method, system, electronic equipment, and storage medium thereof. Background Art

[0002] Wind power generation is an environmentally friendly, renewable energy source. With the large-scale installation and deployment of wind turbines and the increase in the operating capacity and scale of wind farms, the safety and reliability of wind farm operations have attracted widespread attention. Due to the randomness, volatility, and peak-shaving characteristics of wind power generation, integrating a high proportion of wind power into the grid can significantly impact the stability and security of the power system. At low wind speeds, wind turbines (abbreviated as wind turbines) may not reach their rated output power, resulting in unstable output power. At high wind speeds, wind turbines may need to shut down or limit their output power to protect the equipment, which also reduces power generation efficiency. Therefore, how to efficiently utilize wind energy while reducing wind power fluctuations and improving output smoothness is a crucial research topic.

[0003] To reduce wind power fluctuations while improving power generation efficiency and wind energy utilization, some wind turbines are currently equipped with battery energy storage systems. These systems store some of the power when wind speeds are high and the turbine output power is high, and release this power when the output power drops too low. Using battery energy storage systems can, to a certain extent, provide peak-shaving and valley-filling benefits, improving the smoothness of wind turbine output power.

[0004] However, battery energy storage systems often require a larger space for installation, and have high equipment, installation, and subsequent maintenance costs. In particular, batteries require frequent charging and discharging, have a limited service life, and require regular replacement, which increases the total cost of wind power generation and reduces the economic benefits of wind power generation to a certain extent. At the same time, the power density of batteries is limited, making it difficult to release a large amount of energy in a short period of time. The regulatory effect they can play is limited when the wind turbine is in an environment with severe wind speed fluctuations. In addition, the battery energy storage system may be affected by external factors such as temperature and humidity, which may further reduce its service life, and its application scenarios are subject to certain restrictions. Summary of the Invention

[0005] Aiming at the technical problems of the existing battery energy storage system for wind turbines, such as large required space, high cost, limited economic benefits, difficulty in releasing a large amount of energy in a short time, and limited application prospects due to external factors, the invention provides a flywheel energy storage device for wind turbines, its control method, system, electronic device, and storage medium, which can effectively improve the smoothness of the output power of wind turbines, ensure the continuity of power generation, and improve the utilization efficiency of wind energy; the flywheel energy storage device requires less space and has a low cost; it has a high power density and can play a good regulating role; it is less affected by external factors, has a long service life, and is widely used.

[0006] In the first aspect, the invention provides a flywheel energy storage device for wind turbines, including a wind turbine nacelle. A generator is arranged inside the wind turbine nacelle. The generator is connected to the wind turbine main shaft, and the wind turbine main shaft is connected to the wind turbine blades. It further includes a clutch device. One end of the clutch device is connected to the generator through a transmission component, and the other end of the clutch device is connected to the flywheel rotor. The wind turbine main shaft, the generator, the clutch device, and the flywheel rotor are respectively connected to the controller for control, and the controller is used to issue control signals.

[0007] It should be further noted that the wind turbine main shaft is sequentially connected to a speed increasing gearbox and the generator, and the flywheel rotor is connected to a bearing system.

[0008] It should be further noted that an external wind speed acquisition device is arranged outside the wind turbine nacelle.

[0009] In the second aspect, the invention provides a control method for flywheel energy storage of wind turbines, using the above flywheel energy storage device for wind turbines. The steps include: S1. Obtain the operating parameters of the wind turbine and the on-site wind speed in real time. The operating parameters of the wind turbine include the actual output power of the generator, the angular velocity of the flywheel rotor, and the actual connection state of the clutch device. S2. Define the cut-in wind speed v1 and cut-out wind speed v2 of the wind turbine. Judge the on-site working conditions according to the comparison relationship between the on-site wind speed v and v1, v2, and control the connection relationship between the wind turbine main shaft and the generator. Specifically, when v > v2, it is judged that the on-site belongs to the high wind speed working condition, and the connection between the wind turbine main shaft and the generator is controlled to be disconnected. When 110%v1 < v ≤ v2, it is judged that the on-site belongs to the normal wind speed working condition, and the connection between the wind turbine main shaft and the generator is controlled to be connected. When v ≤ 90%v1, it is judged that the on-site belongs to the low wind speed working condition, and the connection between the wind turbine main shaft and the generator is controlled to be disconnected. S3. During the connection process between the wind turbine main shaft and the generator, calculate the wind power volatility and the state of charge of the flywheel energy storage device. The calculation formula for the wind power volatility is:

[0010] In the formula, is the wind power fluctuation rate; is the actual output power of the generator; The target output power of the generator; The calculation formula for the charge state of the flywheel energy storage device is:

[0011] Where, is the charge state of the flywheel energy storage device; is the actual stored energy of the flywheel energy storage device, which is calculated from the flywheel's moment of inertia and actual angular velocity; is the maximum stored energy of the flywheel energy storage device, calculated from the flywheel's moment of inertia and maximum angular velocity; S4 determines the target connection state of the clutch device according to the wind power fluctuation rate and the charge state of the flywheel energy storage device, and forms a clutch control instruction according to the target connection state and the actual connection state of the clutch device; S5. Execute the clutch device control command.

[0012] It should be further explained that the wind turbine main shaft can be disconnected from the flywheel rotor through a transmission device. In step S2, when v>v2 or v≤90%v1, the wind turbine main shaft is controlled to be connected to the flywheel rotor. In other cases, the wind turbine main shaft is controlled to be disconnected from the flywheel rotor.

[0013] It should be further noted that step S2 further includes: setting a low wind speed hysteresis control, wherein the upper threshold of the low wind speed hysteresis control is 110% v1 and the lower threshold is 90% v1; The rules for low wind speed hysteresis control are as follows: when v drops from high wind speed to below 90% v1, the wind turbine main shaft is controlled to disconnect from the generator; when v rises from low wind speed to above 110% v1, the wind turbine main shaft is controlled to connect to the generator; when v fluctuates between 90% v1-110% v1, the wind turbine main shaft and the generator are controlled to maintain the original connection relationship unchanged.

[0014] It should be further explained that, in step S4, the rule for determining the target connection state of the clutch device is: Manually set the judgment limit, the value of the judgment limit is 15%-25%. When the wind power fluctuation rate is greater than or equal to the judgment limit and , determining that the target connection state of the clutch device is an engaged state; When the wind power fluctuation rate is greater than or equal to the judgment limit, When SOC>0, the target connection state of the clutch device is determined to be the engaged state; When the wind power fluctuation rate is greater than or equal to the judgment limit, When SOC=0, the target connection state of the clutch device is determined to be disconnected; When the wind power fluctuation rate is less than the determination limit, the target connection state of the clutch device is determined to be the disconnected state.

[0015] In a third aspect, the present invention provides a wind turbine flywheel energy storage control system for implementing the above-mentioned wind turbine flywheel energy storage control method, comprising: Data acquisition module, used to obtain wind turbine operating parameters and on-site wind speed in real time; Parameter input module, used to input cut-in wind speed v1 and cut-out wind speed v2; The working condition judgment module is used to judge the on-site working condition based on the comparative relationship between the on-site wind speed v and v1 and v2, and control the connection relationship between the wind turbine main shaft and the generator; A calculation module, used to calculate the wind power fluctuation rate and the charge state of the flywheel energy storage device during the connection process between the wind turbine main shaft and the generator; A clutch device control instruction generation module is used to determine the target connection state of the clutch device according to the wind power fluctuation rate and the charge state of the flywheel energy storage device, and to generate a clutch device control instruction according to the target connection state and the actual connection state of the clutch device; The instruction execution module is used to execute the clutch device control instruction.

[0016] In a fourth aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is configured to implement the steps of the above-mentioned wind turbine flywheel energy storage control method when executing the computer program.

[0017] In a fifth aspect, the present invention provides a storage medium having a computer program stored thereon, which implements the steps of the above-mentioned wind turbine flywheel energy storage control method when executed by a processor.

[0018] The beneficial effects of the present invention are: 1. The wind turbine flywheel energy storage control method provided by the present invention provides a wind turbine flywheel energy storage device, obtains wind turbine operating parameters, and calculates wind power fluctuation rate and charge state of the flywheel energy storage device based on the wind turbine operating parameters. It further determines the target connection state of the clutch device, forms and executes control instructions. When the wind turbine output power is too high, the wind turbine flywheel energy storage device can be used to convert excess energy into mechanical energy of flywheel rotation and store it. When the wind turbine output power is too low, the stored mechanical energy is used to provide a certain amount of power support for the wind turbine. This can effectively improve the smoothness of the wind turbine output power, ensure the continuity of power generation, and enhance the utilization efficiency of wind energy.

[0019] 2. The flywheel energy storage device of the present invention requires less space and has low installation, maintenance, and operating costs. It has a high power density, can quickly release energy, and can effectively regulate wind speeds in environments with severe fluctuations, further improving the stability and smoothness of wind turbine output power. Furthermore, the flywheel energy storage device is less affected by external factors, has a long service life, and is widely applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of a wind turbine flywheel energy storage device in one embodiment of the present invention.

[0022] Figure 2 This is a flow chart of a wind turbine flywheel energy storage control method according to an embodiment of the present invention.

[0023] Figure 3 It is a schematic block diagram of a wind turbine flywheel energy storage control system in one embodiment of the present invention.

[0024] Figure 4 FIG. 1 is a schematic diagram of the hardware structure of an electronic device in one embodiment of the present invention.

[0025] In the figure, 1-wind turbine nacelle, 2-generator, 3-wind turbine main shaft, 4-wind turbine blades, 5-clutch device, 6-flywheel rotor, 7-speed increasing gearbox. DETAILED DESCRIPTION

[0026] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0027] The wind turbine flywheel energy storage control method involved in this application is mainly aimed at the field of wind power generation energy storage technology, including setting a wind turbine flywheel energy storage device, obtaining wind turbine operating parameters, and calculating wind power fluctuation rate and charge state of the flywheel energy storage device according to the wind turbine operating parameters, further judging the target connection state of the clutch device, forming a control instruction and executing it. When the wind turbine output power is too high, the wind turbine flywheel energy storage device can be used to convert excess energy into mechanical energy of flywheel rotation and store it, and when the wind turbine output power is too low, the stored mechanical energy can be used to provide a certain power support for the wind turbine, which can effectively improve the smoothness of the wind turbine output power, ensure the continuity of power generation, and improve the utilization efficiency of wind energy; the flywheel energy storage device requires a small space and has low installation, maintenance and operation costs; the flywheel energy storage device has a high power density, can release energy quickly, and can play a good regulating role in an environment with severe wind speed fluctuations, further improving the stability and smoothness of the wind turbine output power; at the same time, the flywheel energy storage device is less affected by external factors, has a long service life, and is widely used.

[0028] The wind turbine flywheel energy storage control method involved in this application is mainly aimed at the technical problems that the battery energy storage system of the existing wind turbine requires a large space, has high cost, limited economic benefits, is difficult to release a large amount of energy in a short time, and is restricted by external factors and has limited application prospects.

[0029] The following describes in detail the wind turbine flywheel energy storage control method involved in this application. Specific details, such as specific system structures and technologies, are provided for illustrative purposes rather than for limitation, to facilitate a thorough understanding of the embodiments of this application. However, it should be clear to those skilled in the art that this application may also be implemented in other embodiments without these specific details.

[0030] In the wind turbine flywheel energy storage control method involved in this application, the term "comprising" is used to indicate the presence of the described features, entities, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, entities, steps, operations, elements, components, and / or their collections. The terms "including," "comprising," "having," and their variations all mean "including but not limited to," unless otherwise specifically emphasized.

[0031] To facilitate the clear description of the technical solutions of this application, the words "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or order of execution, and the words "first" and "second" do not necessarily mean different.

[0032] The phrases "one embodiment" or "some embodiments" described in this application mean that the specific features, structures, or characteristics described in the embodiment are included in one or more embodiments of the application. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in other embodiments," etc. that appear in different places in this application do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized.

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Figure 1 FIG. 1 is a schematic diagram of the structure of a wind turbine flywheel energy storage device according to an embodiment of the present invention. Figure 1 As shown, the wind turbine flywheel energy storage device includes a wind turbine nacelle 1, in which a generator 2 is arranged. The generator 2 is connected to the wind turbine main shaft 3, and the wind turbine main shaft 3 is connected to the wind turbine blades 4. It also includes a clutch device 5, one end of the clutch device 5 is connected to the generator 2 through a transmission component, and the other end of the clutch device 5 is connected to the flywheel rotor 6. The wind turbine main shaft 3, the generator 2, the clutch device 5, and the flywheel rotor 6 are respectively connected to the controller for control, and the controller is used to send control signals.

[0035] Adding a clutch device to the wind power generation system to connect the generator and the flywheel rotor can effectively respond to changes in wind speed, store excess energy at low wind speeds, and release energy at high wind speeds to stabilize power output, improve power generation stability, reduce energy waste, and protect equipment from extreme wind speeds. This extends equipment life, reduces maintenance costs, and optimizes overall power generation efficiency.

[0036] In some specific embodiments, the wind turbine main shaft 3 is connected to the speed increasing gearbox 7 and the generator 2 in sequence, and the flywheel rotor 6 is connected to the bearing system.

[0037] The connection between the wind turbine main shaft and the speed-increasing gearbox and generator, as well as the coordination between the flywheel rotor and the bearing system, enable the wind turbine to adjust the power generation speed according to different wind speeds, ensure the efficient operation of the generator, and at the same time provide stable support for the flywheel rotor, ensure its high-speed rotation stability, improve system integration, facilitate installation and maintenance, enhance system reliability, coordinate the efficient operation of various components, and further improve the performance of the power generation system.

[0038] In some specific embodiments, the main shaft 3 of the wind turbine is disconnectably connected to the flywheel rotor 6 through a transmission device.

[0039] In some specific embodiments, an external wind speed acquisition device is provided outside the nacelle 1 of the wind turbine.

[0040] The wind turbine flywheel energy storage control method provided by the embodiments of the present invention uses the wind turbine flywheel energy storage device as shown in Figure 1 and is executed by a computer device. Correspondingly, the wind turbine flywheel energy storage control system runs in the computer device.

[0041] Figure 2 is a flowchart of the wind turbine flywheel energy storage control method according to an embodiment of the present invention. Among them, Figure 2 The execution subject can be a wind turbine flywheel energy storage control system. According to different requirements, the order of the steps in this flowchart can be changed, and some can be omitted.

[0042] As Figure 2 shown, the wind turbine flywheel energy storage control method includes: Step S1, obtain the operating parameters of the wind turbine and the on-site wind speed in real time. The operating parameters of the wind turbine include the actual output power of the generator, the angular velocity of the flywheel rotor, and the actual connection state of the clutch device.

[0043] Obtaining the operating parameters of the wind turbine and the on-site wind speed in real time provides a comprehensive and real-time data basis for the system to accurately judge the working conditions, calculate key indicators, and formulate reasonable control strategies, ensuring that subsequent control actions are accurate and effective, improving the system's monitoring and regulation capabilities for the wind power generation process, and enhancing the stability and reliability of the system operation.

[0044] Step S2, define the cut-in wind speed v1 and the cut-out wind speed v2 of the wind turbine, judge the on-site working conditions according to the comparison relationship between the on-site wind speed v and v1, v2, and control the connection relationship between the main shaft of the wind turbine and the generator; Specifically, when v > v2, it is judged that the on-site belongs to the high wind speed working condition, and the main shaft of the wind turbine is controlled to be disconnected from the generator; When 110%v1 < v ≤ v2, it is judged that the on-site belongs to the normal wind speed working condition, and the main shaft of the wind turbine is controlled to be connected to the generator; When v ≤ 90%v1, it is judged that the on-site belongs to the low wind speed working condition, and the main shaft of the wind turbine is controlled to be disconnected from the generator.

[0045] Judging the working conditions according to the cut-in wind speed v1 and the cut-out wind speed v2 and combining the on-site wind speed, and accurately controlling the connection relationship between the main shaft of the wind turbine and the generator, so that the wind turbine can be in the best working state under different wind speed environments, avoiding equipment damage due to abnormal wind speed, ensuring power generation efficiency, improving the adaptability of the wind turbine to wind speed changes, realizing intelligent management of the power generation process, and improving the overall performance of the system.

[0046] In some specific embodiments, the wind turbine main shaft can be disconnected from the flywheel rotor through a transmission device. In step S2, when v>v2 or v≤90%v1, the wind turbine main shaft is controlled to be connected to the flywheel rotor. In other cases, the wind turbine main shaft is controlled to be disconnected from the flywheel rotor.

[0047] Controlling the connection between the wind turbine main shaft and the flywheel rotor according to wind speed conditions enhances the energy synergy between the wind turbine and the flywheel energy storage device, making energy transfer more reasonable and efficient, reducing unnecessary energy loss, improving the overall efficiency of the system at different wind speeds, optimizing system performance, ensuring stable operation of the system under various working conditions, and giving full play to the role of the flywheel energy storage device.

[0048] In some specific embodiments, step S2 further includes: setting a low wind speed hysteresis control, wherein the upper threshold of the low wind speed hysteresis control is 110% v1 and the lower threshold is 90% v1; The rules for low wind speed hysteresis control are as follows: when v drops from high wind speed to below 90% v1, the wind turbine main shaft is controlled to disconnect from the generator; when v rises from low wind speed to above 110% v1, the wind turbine main shaft is controlled to connect to the generator; when v fluctuates between 90% v1-110% v1, the wind turbine main shaft and the generator are controlled to maintain the original connection relationship unchanged.

[0049] Setting low wind speed hysteresis control can effectively avoid frequent switching of the connection between the wind turbine main shaft and the generator caused by small fluctuations in wind speed, reduce equipment wear, extend the equipment service life, reduce interference with system stability, and make the power generation process smoother; keeping the connection relationship unchanged within the wind speed fluctuation range can ensure power generation continuity, reduce the impact of control actions on the system, improve system reliability and operability, and enhance the system's ability to cope with complex wind speed changes.

[0050] Step S3: During the connection between the wind turbine main shaft and the generator, the wind power fluctuation rate and the charge state of the flywheel energy storage device are calculated. The calculation formula of the wind power fluctuation rate is:

[0051] Where, is the wind power fluctuation rate; is the actual output power of the generator; The target output power of the generator; The calculation formula for the charge state of the flywheel energy storage device is:

[0052] Where, is the charge state of the flywheel energy storage device; is the actual stored energy of the flywheel energy storage device, which is calculated from the flywheel's moment of inertia and actual angular velocity; The maximum stored energy of the flywheel energy storage device is calculated from the flywheel's moment of inertia and maximum angular velocity.

[0053] When the wind turbine main shaft is connected to the generator, the wind power fluctuation rate and the charge state of the flywheel energy storage device are calculated. The wind power fluctuation rate can intuitively reflect the stability of the generated power, and the charge state clearly indicates the remaining energy of the energy storage device. The calculation results of the two provide a key basis for the system to judge the status of the clutch device, which helps to reasonably arrange energy storage and release, optimize energy utilization, ensure stable operation of the system, and improve the system's ability to respond to fluctuations in generated power.

[0054] Step S4: determining the target connection state of the clutch device according to the wind power fluctuation rate and the charge state of the flywheel energy storage device, and generating a clutch device control instruction according to the target connection state and the actual connection state of the clutch device.

[0055] The target connection state of the clutch device is determined based on the wind power fluctuation rate and the charge state of the flywheel energy storage device, and control instructions are generated to facilitate the subsequent intelligent dynamic control of the clutch device, so that the flywheel energy storage device can timely participate in or exit the energy regulation process according to the actual needs of the system, ensuring that the system can maintain efficient and stable operation under different working conditions, reducing energy loss, extending the service life of equipment, and improving the overall operating efficiency of the system.

[0056] In some specific embodiments, the rule for determining the target connection state of the clutch device is: Manually set the judgment limit, the value of the judgment limit is 15%-25%. When the wind power fluctuation rate is greater than or equal to the judgment limit and , determining that the target connection state of the clutch device is an engaged state; When the wind power fluctuation rate is greater than or equal to the judgment limit, When SOC>0, the target connection state of the clutch device is determined to be the engaged state; When the wind power fluctuation rate is greater than or equal to the judgment limit, When SOC=0, the target connection state of the clutch device is determined to be disconnected; When the wind power fluctuation rate is less than the determination limit, the target connection state of the clutch device is determined to be the disconnected state.

[0057] By reasonably setting the judgment boundary and combining relevant parameters to judge the target connection state of the clutch device, the control of the clutch device is made more scientific and accurate, enhancing the system's response ability to different working conditions, ensuring the stable operation of the system; determining the connection of the clutch device according to the state of charge of the flywheel energy storage device can make full use of the energy storage capacity for power regulation, while avoiding over-discharging to damage the equipment, ensuring the safe and effective operation of the energy storage device, prolonging its service life, and improving the overall performance of the system.

[0058] Step S5, execute the control instruction of the clutch device.

[0059] Execute the control instruction of the clutch device, put the control strategy calculated and judged in the previous steps into practice, adjust the connection state of the clutch device in a timely and accurate manner, enable the components of the system to work together to achieve the expected effect, ensure the stable operation of the entire wind turbine flywheel energy storage system, realize the effective management and optimal utilization of energy, and improve the adaptability and overall performance of the power generation system to complex working conditions.

[0060] In a specific embodiment, the wind turbine flywheel energy storage device includes a wind turbine nacelle 1. An external wind speed acquisition device is arranged outside the wind turbine nacelle 1. A generator 2 is arranged inside the wind turbine nacelle 1. The generator 2 is sequentially connected to a speed increasing gearbox 7 and a wind turbine main shaft 3. The wind turbine main shaft 3 is connected to wind turbine blades 4. It further includes a clutch device 5. One end of the clutch device 5 is connected to the generator 2 through a transmission component. The other end of the clutch device 5 is connected to a flywheel rotor 6. The flywheel rotor 6 is connected to the bearing system in a matching manner. The wind turbine main shaft 3 is disconnectably connected to the flywheel rotor 6 through a transmission device. The wind turbine main shaft 3, the generator 2, the clutch device 5, and the flywheel rotor 6 are respectively connected to a controller for control. The controller is used to issue control signals.

[0061] In a specific embodiment, the wind turbine flywheel energy storage control method includes: Step S1, obtain the operating parameters of the wind turbine and the on-site wind speed in real time. The operating parameters of the wind turbine include the actual output power of the generator, the angular velocity of the flywheel rotor, and the actual connection state of the clutch device; Step S2, define the cut-in wind speed v1 and cut-out wind speed v2 of the wind turbine, judge the on-site working conditions according to the comparison relationship between the on-site wind speed v and v1, v2, and control the connection relationship between the wind turbine main shaft and the generator; Specifically, when v > v2, it is judged that the on-site is in a high wind speed working condition, and the connection between the wind turbine main shaft and the generator is controlled to be disconnected; When 110%v1 < v ≤ v2, it is judged that the on-site is in a normal wind speed working condition, and the connection between the wind turbine main shaft and the generator is controlled to be connected; When v ≤ 90%v1, it is judged that the on-site is in a low wind speed working condition, and the connection between the wind turbine main shaft and the generator is controlled to be disconnected.

[0062] Set low wind speed hysteresis control, the upper threshold of low wind speed hysteresis control is 110%v1, and the lower threshold is 90%v1; The rules for low wind speed hysteresis control are as follows: when v drops from a high wind speed to below 90% v1, the wind turbine main shaft is disconnected from the generator; when v rises from a low wind speed to above 110% v1, the wind turbine main shaft is connected to the generator; when v fluctuates between 90% v1 and 110% v1, the wind turbine main shaft and the generator are kept connected. When v>v2 or v≤90%v1, the wind turbine main shaft is controlled to be connected to the flywheel rotor; in other cases, the wind turbine main shaft is controlled to be disconnected from the flywheel rotor; Step S3: During the connection between the wind turbine main shaft and the generator, the wind power fluctuation rate and the charge state of the flywheel energy storage device are calculated. The calculation formula of the wind power fluctuation rate is:

[0063] Where, is the wind power fluctuation rate; is the actual output power of the generator; The target output power of the generator; The calculation formula for the charge state of the flywheel energy storage device is:

[0064] Where, is the charge state of the flywheel energy storage device; is the actual stored energy of the flywheel energy storage device, which is calculated from the flywheel's moment of inertia and actual angular velocity; is the maximum stored energy of the flywheel energy storage device, calculated from the flywheel's moment of inertia and maximum angular velocity; Step S4, determining a target connection state of the clutch device according to the wind power fluctuation rate and the charge state of the flywheel energy storage device, and generating a clutch device control instruction according to the target connection state and the actual connection state of the clutch device; The rules for determining the target connection state of the clutch device are: The judgment limit is set manually, and the value of the judgment limit is 20%. When the wind power fluctuation rate is greater than or equal to the judgment limit and , determining that the target connection state of the clutch device is an engaged state; When the wind power fluctuation rate is greater than or equal to the judgment limit, When SOC>0, the target connection state of the clutch device is determined to be the engaged state; When the wind power fluctuation rate is greater than or equal to the judgment limit, When SOC=0, the target connection state of the clutch device is determined to be disconnected; When the wind power fluctuation rate is less than the judgment limit, the target connection state of the clutch device is judged to be the disconnected state; Step S5: executing the clutch device control instruction.

[0065] The following is an embodiment of the wind turbine flywheel energy storage control system provided by the embodiments of the present disclosure. The active load reduction optimization system and the wind turbine flywheel energy storage control method of the above-mentioned embodiments belong to the same inventive concept. For details not fully described in the embodiments of the wind turbine flywheel energy storage control system, please refer to the embodiments of the above-mentioned wind turbine flywheel energy storage control method.

[0066] A mobile terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the subsequent description, suffixes such as "module," "component," or "unit" used to denote components are used solely to facilitate description of the embodiments of the present invention and do not inherently have specific meanings. Therefore, "module" and "component" may be used interchangeably.

[0067] like Figure 3 As shown, the wind turbine flywheel energy storage control system includes: Data acquisition module, used to obtain wind turbine operating parameters and on-site wind speed in real time; Parameter input module, used to input cut-in wind speed v1 and cut-out wind speed v2; The working condition judgment module is used to judge the on-site working condition based on the comparative relationship between the on-site wind speed v and v1 and v2, and control the connection relationship between the wind turbine main shaft and the generator; A calculation module, used to calculate the wind power fluctuation rate and the charge state of the flywheel energy storage device during the connection process between the wind turbine main shaft and the generator; A clutch device control instruction generation module is used to determine the target connection state of the clutch device according to the wind power fluctuation rate and the charge state of the flywheel energy storage device, and to generate a clutch device control instruction according to the target connection state and the actual connection state of the clutch device; The instruction execution module is used to execute the clutch device control instruction.

[0068] The present application also provides an electronic device for implementing various embodiments of the present invention. The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor.

[0069] Those skilled in the art will understand that the electronic device structure involved in the embodiments of the present invention does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0070] Figure 4A schematic diagram of the hardware structure of an electronic device for implementing various embodiments of the present invention.

[0071] The electronic device 500 includes, but is not limited to, components such as a processor 501, a network module 502, an audio output unit 503, an input unit 504, a display unit 506, a user input unit 507, an interface unit 508, and a memory 509. Those skilled in the art will appreciate that the electronic device structure described in the embodiments of the present invention does not limit the electronic device, and that the electronic device may include more or fewer components than shown, or may combine certain components or arrange the components differently.

[0072] In the embodiments of the present invention, electronic devices include, but are not limited to, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic devices may also represent various forms of mobile devices and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the embodiments of the present application described and / or claimed herein.

[0073] In the embodiment of the present application, the processor 501 can be implemented by using at least one of an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a processor, a controller, a microcontroller, a microprocessor, and an electronic unit designed to perform the functions described herein. In some cases, such an embodiment can be implemented in a controller. For software implementation, an embodiment such as a process or function can be implemented with a separate software module that allows the execution of at least one function or operation. The software code can be implemented by a software application (or program) written in any appropriate programming language, and the software code can be stored in a memory and executed by a controller.

[0074] The display unit 506 is used to display information input by the user or information provided to the user. The display unit 506 may include a display panel, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.

[0075] The user input unit 507 may include, but is not limited to, a physical keyboard, function keys (such as a volume control key, a power key, etc.), a trackball, a mouse, and an operating stick, which will not be described in detail here.

[0076] The interface unit 508 is an interface for connecting external devices to the electronic device 500. For example, the external devices may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, and the like.

[0077] In addition, the electronic device 500 includes some functional modules not shown, which will not be described here.

[0078] Those skilled in the art will appreciate that various aspects of the electronic device provided herein may be implemented as a system, method, or program product. Therefore, various aspects of the present disclosure may be implemented in the following forms: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, which may be collectively referred to herein as "circuits," "modules," or "systems."

[0079] The present application also provides a storage medium storing a program product capable of implementing a wind turbine flywheel energy storage control method. In some possible implementations, various aspects of the present disclosure may also be implemented in the form of a program product comprising program code. When the program product is executed on a terminal device, the program code is configured to cause the terminal device to execute the steps described in the "Exemplary Methods" section above according to various exemplary implementations of the present disclosure.

[0080] The storage medium can be any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0081] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wind turbine flywheel energy storage device, comprising a wind turbine nacelle, a generator disposed in the wind turbine nacelle, the generator being connected to a wind turbine main shaft, the wind turbine main shaft being connected to wind turbine blades, characterized in that: It further includes a clutch device. One end of the clutch device is connected to the generator through a transmission component, and the other end of the clutch device is connected to the flywheel rotor. The wind turbine main shaft, the generator, the clutch device, and the flywheel rotor are respectively connected to the controller for control, and the controller is used to issue control signals.

2. The wind turbine flywheel energy storage device according to claim 1, characterized in that: The wind turbine main shaft is sequentially connected to the speed increasing gearbox and the generator, and the flywheel rotor is connected to the bearing system.

3. The wind turbine flywheel energy storage device according to claim 1, characterized in that: An external wind speed acquisition device is arranged outside the wind turbine nacelle.

4. A wind turbine flywheel energy storage control method, characterized in that: Using the wind turbine flywheel energy storage device as described in claim 1, the steps include: S1. Obtain the wind turbine operation parameters and the on-site wind speed in real time. The wind turbine operation parameters include the actual output power of the generator, the angular velocity of the flywheel rotor, and the actual connection state of the clutch device. S2. Define the cut-in wind speed v1 and the cut-out wind speed v2 of the wind turbine, judge the on-site working condition according to the comparison relationship between the on-site wind speed v and v1, v2, and control the connection relationship between the wind turbine main shaft and the generator. Specifically, when v > v2, it is judged that the on-site is in a high wind speed working condition, and the connection between the wind turbine main shaft and the generator is controlled to be disconnected. When 110%v1 < v ≤ v2, it is judged that the on-site is in a normal wind speed working condition, and the connection between the wind turbine main shaft and the generator is controlled to be connected. When v ≤ 90%v1, it is judged that the on-site is in a low wind speed working condition, and the connection between the wind turbine main shaft and the generator is controlled to be disconnected. S3. During the connection process between the wind turbine main shaft and the generator, calculate the wind power volatility and the state of charge of the flywheel energy storage device. The calculation formula for the wind power volatility is: Where, is the wind power fluctuation rate; is the actual output power of the generator; The target output power of the generator; The calculation formula for the state of charge of the flywheel energy storage device is: Where, is the charge state of the flywheel energy storage device; is the actual stored energy of the flywheel energy storage device, which is calculated from the flywheel's moment of inertia and actual angular velocity; is the maximum stored energy of the flywheel energy storage device, calculated from the flywheel's moment of inertia and maximum angular velocity; S4. Judge the target connection state of the clutch device according to the wind power volatility and the state of charge of the flywheel energy storage device, and form a clutch device control instruction according to the target connection state and the actual connection state of the clutch device. S5. Execute the clutch device control instruction.

5. The wind turbine flywheel energy storage control method according to claim 4, characterized in that: The wind turbine main shaft is disconnectably connected to the flywheel rotor through a transmission device. In step S2, when v > v2 or v ≤ 90%v1, control the connection between the wind turbine main shaft and the flywheel rotor, and in other cases, control the disconnection between the wind turbine main shaft and the flywheel rotor.

6. The wind turbine flywheel energy storage control method according to claim 4, characterized in that: Step S2 further includes: setting a low wind speed hysteresis control, the upper threshold of the low wind speed hysteresis control is 110%v1, and the lower threshold is 90%v1. The rule of the low wind speed hysteresis control is: when v drops from a high wind speed to less than 90%v1, control the disconnection between the wind turbine main shaft and the generator; when v rises from a low wind speed to higher than 110%v1, control the connection between the wind turbine main shaft and the generator; when v fluctuates between 90%v1 - 110%v1, control the wind turbine main shaft and the generator to maintain the original connection relationship unchanged.

7. The wind turbine flywheel energy storage control method according to claim 4, characterized in that: In step S4, the rule for judging the target connection state of the clutch device is: Manually set the judgment limit, the value of the judgment limit is 15%-25%. When the wind power fluctuation rate is greater than or equal to the judgment limit and , determining that the target connection state of the clutch device is an engaged state; When the wind power fluctuation rate is greater than or equal to the judgment limit, When SOC>0, the target connection state of the clutch device is determined to be the engaged state; When the wind power fluctuation rate is greater than or equal to the judgment limit, When SOC=0, the target connection state of the clutch device is determined to be disconnected; When the wind power volatility is less than the determination limit, judge that the target connection state of the clutch device is the disconnection state.

8. A wind turbine flywheel energy storage control system, characterized in that: For implementing the wind turbine flywheel energy storage control method as described in any one of claims 2 - 7, it includes: A data acquisition module for obtaining the wind turbine operation parameters and the on-site wind speed in real time. A parameter input module for inputting the cut-in wind speed v1 and the cut-out wind speed v2. A working condition judgment module for judging the on-site working condition according to the comparison relationship between the on-site wind speed v and v1, v2, and controlling the connection relationship between the wind turbine main shaft and the generator. A calculation module, used to calculate the wind power fluctuation rate and the charge state of the flywheel energy storage device during the connection process between the wind turbine main shaft and the generator; A clutch device control instruction generation module is used to determine the target connection state of the clutch device according to the wind power fluctuation rate and the charge state of the flywheel energy storage device, and to generate a clutch device control instruction according to the target connection state and the actual connection state of the clutch device; The instruction execution module is used to execute the clutch device control instruction.

9. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor is configured to implement the steps of the wind turbine flywheel energy storage control method as described in any one of claims 3 to 7 when executing the computer program.

10. A storage medium, characterized in that: The storage medium stores a computer program, which, when executed by a processor, implements the steps of the wind turbine flywheel energy storage control method according to any one of claims 3 to 7.

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