Fluid kinetic energy full-spiral power generation rate regulation and control method and power generation rate regulation and control device

Abstract

The invention provides a fluid kinetic energy full-rotation power generation rate regulation and control method and a power generation rate regulation and control device. The fluid kinetic energy full-rotation power generation rate regulation and control method is based on fluid kinetic energy full-rotation power generation systems of patent literatures CN112963285A and CN105464901A, and the regulation and control method comprises the step of adjusting and controlling the power generation output capacity of the power generation system according to needs by adjusting an offset yaw angle between a rotation system reference mirror surface of the system and an actual fluid flow direction. The power generation rate regulation and control device comprises a worm and gear mechanism and a regulation and control motor, wherein a worm gear is fixedly arranged on a rotary system mandrel. According to the technical scheme, the double functions of wind direction adjusting and variable-pitch adjusting and controlling are comprehensively achieved, the structural composition is extremely simplified, and the technical advantages of being fast and efficient in adjusting and controlling are achieved.

Description

Technical Field

[0001] This invention relates to a fluid power generation device for the electroconversion of fluid kinetic energy, and more particularly to a fluid power generation device that enables the power generation system to have an innovative conversion capability regulation function. Background Technology

[0002] Rivers, ocean currents, tides, and wind are all abundant and inexhaustible energy resources in nature. With the development of science and technology, many technologies have emerged that utilize these green, clean, and pollution-free natural resources to generate electricity for the benefit of mankind. Taking wind power generation as an example, its power generation efficiency and safety mainly depend on the three major control parts of the wind power generation system: first, the yaw section used to adjust the direction of the wind to improve the capture of wind kinetic energy; second, the pitch section to ensure the safe operation of the system under extreme wind speeds; and third, the unmooring section that is affected by the yaw. The yaw system, designed to ensure the impeller is always facing the wind to maximize wind energy capture, primarily consists of a yaw motor, reducer, transmission gears, and yaw brake. Its operation, from start-up to braking, generates considerable, sharp noise, causing significant noise pollution. Furthermore, the nacelle's rotation for wind-adjustment causes cable twisting, especially when the nacelle's orientation is continuously adjusted in a single direction due to uncertain wind direction changes. This can lead to excessive twisting or tangling of the power cables connecting the tower and the aircraft. If not addressed promptly, this can result in cable breakage, insulation damage, or even short circuits. To prevent this, the system requires periodic reverse cable uncoupling by the uncoupling section, a process that also generates unbearable, harsh noise. The pitch mechanism in a wind power generation system is a component used to adjust the efficiency of wind power generation, especially the operational safety, according to wind speed. It consists of a pitch motor, a reducer, a bearing mechanism, and a control system. The motor control requires high precision, and the overall mechanism is large, costly, complex in setup, and has relatively low operating efficiency. These problems are even more prominent when adjusting for high torque at extremely high wind speeds, and its manufacturing technology requirements are even higher.

[0003] Patent document CN105464901A discloses a full-stroke, resistance-free fluid energy conversion device. Its main structure includes a rotary assembly and a generator. The rotary assembly features a main rotary disk with equal central angles, on which several wind-driven impellers rotate. The transmission between the central gear disk on the main rotary disk shaft and the impeller shaft gear disk ensures that the impeller shaft not only rotates in the same direction as its revolution, but also that the revolution angle α generated by the impeller shaft with the main rotary disk is twice its rotation angle β. When the guide vane of the rotary disk's main shaft aligns with the fluid flow direction, the rotary assembly can achieve maximum energy conversion operation in this state. Patent document CN112963285A, based on the aforementioned patent documents, provides a technical solution for a multi-stage gradient rotary disk energy conversion unit.

[0004] Existing patent documents have cleverly reduced fluid resistance during power generation, enabling operation at the lowest flow resistance and highest power conversion rate. However, these patent solutions lack the ability to flexibly adjust power conversion based on grid power demand or natural fluid energy conditions, and they also fail to address the technical issues of ensuring the overall safety of the system. Furthermore, they cannot solve this technical problem based on existing wind power generation technologies with completely different working principles and operating structures. Summary of the Invention

[0005] The purpose of this invention is to solve the problem of existing full-stroke unobstructed fluid energy conversion devices having the ability to adjust power generation conversion on demand, and to avoid the technical problems of complex device structure, large size, low operating efficiency and high cost of existing wind power generation technology. The invention provides a fluid kinetic energy full-stroke power generation rate control method and power generation rate control device.

[0006] To achieve the above objectives, this invention patent provides a method for regulating the power generation rate of fluid kinetic energy throughout its entire rotation, the main technical content of which is as follows: A method for regulating the power generation rate of fluid kinetic energy throughout its rotation, which is based on a fluid kinetic energy full-rotation power generation system; The power generation system includes a rotary system with a spindle as the axis of rotation, a generator linked to the rotary system, and a central control console; The aforementioned mandrel has a guiding reference on it; The aforementioned rotary system includes at least one rotary unit; Each rotating unit has a rotating impeller on its main rotating body, which is parallel to the spindle, equidistant from the spindle, and distributed at equal central angles; each rotating unit is arranged on the spindle at intervals according to the radius gradient of the main rotating body. The linkage between the spindle and the wheel axle makes the rotation direction of the wheel axle the same as the revolution direction of its main rotating body, and the rotation angle β of the wheel axle is 1 / 2 of the revolution angle α of its main rotating body; The method of this power generation rate control method is as follows: Using the plane of the guiding reference when the power generation system is in the same plane as the fluid flow direction during maximum energy conversion operation as the reference mirror of the rotating system, the angle between the reference mirror of the rotating system and the fluid flow direction, i.e. the yaw angle, is adjusted according to the corresponding offset required by the power grid side, thereby completing the adjustment of the power generation output capacity of this power generation system.

[0007] In one preferred embodiment of the above overall technical solution, the yaw angle adjustment range is 0~90º or 0~-90º yaw angle.

[0008] In one preferred embodiment of the above overall technical solution, the guiding reference is a guiding rudder.

[0009] To achieve the above objectives, this invention patent also provides a power generation control device for implementing the above-mentioned fluid kinetic energy full-stroke power generation control method, the main technical content of which is: A power generation rate control device, comprising a wind direction sensor, a worm gear mechanism, and a control motor; The worm gear mechanism is assembled on the spindle, wherein the worm coupling is set on the output shaft of the control motor and forms a meshing transmission pair with the worm gear fixed on the spindle; The aforementioned control motor is an execution component of the CPU execution bus of the central control console; The wind direction sensor mentioned above is the wind direction acquisition component of the central control console CPU wind direction acquisition bus.

[0010] In one preferred embodiment of the above overall technical solution, the control motor is preferably a servo motor.

[0011] In one preferred embodiment of the above overall technical solution, the control motor is most preferably a stepper motor.

[0012] In one preferred embodiment of the above overall technical solution, the worm gear mechanism is installed at the near-axial end of the spindle.

[0013] One preferred option of the above overall technical solution also includes a spindle rotation angle sensor, which is electrically connected to the spindle rotation angle acquisition bus of the central control panel CPU.

[0014] One preferred option of the above overall technical solution also includes an anemometer, which serves as the anemometer acquisition component for the CPU anemometer acquisition bus of the central control console.

[0015] The beneficial effects of the fluid kinetic energy full-cycle power generation rate control method and power generation rate control device disclosed in this invention are as follows: 1) It achieves the technical objective of regulating the power output of the generator in accordance with the energy output demand. Based on the power demand of the grid side, the yaw angle value of the corresponding power generation capacity of the power generation side is obtained. The control motor and worm gear mechanism control the rotary system to perform the corresponding yaw adjustment, thereby achieving the technical purpose of power generation conversion output on demand. At the same time, the self-locking function of the worm gear mechanism is cleverly used to achieve yaw braking in place without the need for additional braking devices. 2) Determine the safe operation of this power generation system. When the central control station detects that the fluid flow rate exceeds the normal value or forcibly activates the safety operation process, if there is a risk of typhoon or high tide, it can force the rotation system of this power generation unit to adjust to an extreme yaw angle area with a power generation rate close to zero, thereby protecting the entire power generation unit from damage by strong current. It can also continue to generate electricity in a yaw angle area with an extremely low power generation rate in a strong current environment, avoiding power grid outages and other economic losses caused by power generation stoppage.

[0016] As can be seen from the above, another key technical effect of this fluid kinetic energy full-cycle power generation rate control method and power generation rate control device is that it integrates the existing dual functions of wind direction adjustment and pitch control with an extremely simplified structural composition, and there is no cable twisting during the control process. It also has the technical advantages of fast control, high efficiency and self-locking braking. Attached Figure Description

[0017] Figure 1 This is a general configuration diagram of an embodiment of the fluid kinetic energy full-cycle power generation system of the present invention.

[0018] Figure 2 This is a schematic diagram illustrating the principle of the power generation system during maximum energy conversion operation.

[0019] Figure 3 (1) to (4) are schematic diagrams illustrating the principle of power generation rate control with different yaw angles.

[0020] Figure 4 and Figure 5 These are cross-sectional and top views of the power generation control device.

[0021] Figure 6 This is a general structural diagram of a fluid kinetic energy full-cycle power generation system containing this power generation rate control device. Detailed Implementation

[0022] The technical solution of the present invention will be described in detail below with reference to the embodiment diagrams and schematic diagrams. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are also within the protection scope of the present invention.

[0023] This technical specification is mainly based on Figure 1 , Figure 6 The illustrated structure of the fluid kinetic energy full-cycle power generation system demonstrates the implementation of this fluid kinetic energy full-cycle power generation rate control method. Among them... Figure 1 and Figure 2 Cited respectively from patent document CN112963285A Figure 1 System construction diagram and Figure 4 A simplified structural diagram based on the principle. Figure 1 The diagram shows a three-rotation unit structure with inner and outer layers nested along the central axis in a gradient manner. Figure 2 The diagram shows the rotational operation principle of two adjacent rotating units, the principle of which has been described in patent document CN105464901A.

[0024] The fluid kinetic energy full-range rotation power generation system mentioned above, see [link to relevant documentation]. Figure 1 or Figure 6As shown, its principle includes a rotating system M with a spindle 1 as the center of rotation, a generator 23 linked to the rotating system M, a system frame 5, and a central control console; the rotating system M is rotatably supported and mounted on the system frame 5 by the spindle 1. The generator 23 is connected to the power grid via a rectifier 24, a rechargeable battery 25, and an inverter 26.

[0025] The aforementioned rotary system M has a spindle 1 as the main axis of rotation, on which at least one rotary unit is rotatably mounted. Figure 1 The illustrated embodiment shows three rotating units arranged on the spindle 1 in an increasing or decreasing gradient order of their respective main rotating bodies A. Each rotating unit's main rotating body A has a pneumatic impeller B, with its axle parallel to the spindle 1, distributed equidistant from the spindle and rotating at equal central angles, forming a rotating system embodiment with three rotating units that operate nested inside and outside the spindle along the spindle according to the aforementioned gradient.

[0026] A guide rudder 3 is fixed on the spindle 1; the guide rudder can also be determined based on the data collected by the wind direction sensor 2 from the central control unit CPU. The wind direction sensor 2 serves as the wind direction acquisition component of the central control unit CPU wind direction acquisition bus.

[0027] A rotation linkage is provided between the spindle 1 and the axle of the wind turbine B. The rotation linkage ensures that the rotation direction of the axle of each wind turbine B or the wind turbine B is the same as the revolution direction of the main rotating body A, and the rotation angle β of the axle of the wind turbine B or the wind turbine B is 1 / 2 of the revolution angle α of the main rotating body. The guide rudder 3 is coplanar with the fluid flow direction when the fluid kinetic energy full-range rotation power generation system is in the maximum energy conversion operation state. At this time, the surface where the guide rudder 3 is located is the reference mirror surface of this rotating system.

[0028] The basic working principle of this fluid kinetic energy full-range rotation power generation system is as follows: Figure 2 As shown, since the technology has been clearly and completely described in the two patent documents mentioned above, it will not be repeated here.

[0029] Taking one of the rotating units as an example, this fluid kinetic energy full-range rotation power generation system is used to illustrate the working principle of the corresponding power generation capacity by showing the different yaw angles, that is, the angle by which the reference mirror of the rotating system deviates from the actual fluid flow direction. Figure 3 (1) is a schematic diagram of the operating principle when the reference mirror of the rotary system is in the same direction and coplanar with the fluid flow direction; Figure 3 (2) is a schematic diagram of the operation principle when yawing counterclockwise by 90°; Figure 3 (3) is a schematic diagram of the operating principle of clockwise yaw rotation of 90°; Figure 3 (4) is a diagram of the operating principle of rotating counterclockwise by 30º.

[0030] Using the guide rudder 3 as the reference for the yaw angle offset of the reference mirror of the slewing system, when it is coplanar with the fluid flow direction, there is no yaw angle, 0º yaw angle, and the slewing system is in the maximum energy conversion operation state. When the reference mirror is offset by 90º counterclockwise or clockwise relative to the fluid flow direction, i.e., the yaw angle is 90º, it is obvious that the wind turbines on each slewing unit in the slewing system operate in a mirror-symmetrical state relative to the fluid flow direction, i.e., the work done on both sides of the slewing system cancels each other out, theoretically resulting in a no-work output state. If the angle between the reference mirror and the fluid flow direction is between 0° and 90° counterclockwise or between 0° and -90° clockwise, it can be known that the power generation output capability of the slewing system in this state is between the maximum and minimum.

[0031] Therefore, we can use the yaw angle of the drive-adjusting rotary system to switch and adjust the kinetic energy conversion output capacity between the maximum energy conversion rate and the theoretical value of zero conversion rate. The central control console adjusts the yaw angle of this fluid kinetic energy full-stroke power generation system in the fluid according to the power load required by the grid side, so that the power generation side can match the power demand of the grid side. It can also automatically or manually force the entire power generation system to adjust to an extreme yaw angle position where the theoretical power generation capacity is close to zero when the flow velocity exceeds the normal value, such as when facing the risk of strong typhoons or strong sea waves, thereby protecting the entire power generation system from damage by strong current, or continuing to operate safely with a relatively low conversion rate in strong current environment.

[0032] To realize the fluid kinetic energy full-stroke power generation rate regulation method, a power generation rate conversion control device is added to this fluid kinetic energy full-stroke power generation system.

[0033] The power generation conversion control device of the present invention, such as Figure 4 and Figure 5 As shown, it consists of a worm gear mechanism and a control motor 10.

[0034] The base 14 of the regulating motor 10 is fixedly mounted on the system frame 5 and connected to an execution bus of the central control CPU. The worm gear 12 is coupled to the output shaft of the regulating motor 10 and cooperates with the worm wheel 11 to form a worm gear mechanism. The worm wheel 11 is fixedly mounted on the spindle 1, so that the spindle 1 is controlled by the regulating output of the regulating motor 10, deflecting and controlling the yaw angle of the overall rotation system, thereby ensuring that the power generation capacity on the generator side matches the power demand on the grid side.

[0035] In this embodiment, to ensure assembly stability, the worm gear 11 is rotatably supported on the base 14 via the bearing 15.

[0036] In this embodiment, in order to monitor the actual yaw angle of the spindle 1, a spindle angle sensor 4 is provided on the spindle 1, which is electrically connected to the spindle angle acquisition bus of the central control CPU.

[0037] This fluid kinetic energy full-stroke power generation system is also equipped with an anemometer 6, which serves as the wind speed acquisition component of the central control console CPU wind speed acquisition bus.

[0038] If it is necessary to match the load requirements of the grid side, the central control CPU program determines whether the power generation of this fluid kinetic energy full-range rotation power generation system exceeds or falls below the load requirements of the grid side during the current operating phase. In this case, the central control CPU sends a control execution command to the control motor based on the current wind speed conditions and the yaw angle corresponding to the power consumption of the grid side. This drives the worm gear mechanism to make the spindle 1 drive the rotation system, offsetting the angle between the reference mirror of the rotation system and the fluid flow direction by the yaw angle.

[0039] Similarly, when the central control CPU detects that the surrounding flow velocity exceeds the limit setting value through the anemometer 6, it instructs the control motor 10 to actively adjust the yaw angle of the entire rotation system to an angle range close to or close to the theoretical power generation capacity, so as to protect the entire power generation system from damage under strong flow velocity.

[0040] The control motor can preferably be a servo motor, and most preferably a stepper motor.

[0041] The worm gear mechanism itself has a self-locking function, which can ensure that the offset is controlled only by the control motor 10; combined with the servo motor or stepper motor used, it ensures the yaw adjustment accuracy.

[0042] The worm gear mechanism is preferably installed at the end of the spindle 1 shaft.

[0043] This fluid kinetic full-range power generation system operates under high-voltage power generation conditions. The central control console needs to maintain real-time communication with numerous detection, monitoring, and execution devices within the system. To ensure the insulation safety between the central control console and the high-voltage system, the wind direction sensor 2, spindle angle sensor 4, wind vane 6, generator output rectifier 24, rechargeable battery 25, and grid-side power detection components utilize wireless communication with the central control console, such as IoT + wireless Wi-Fi (with IoT card), to achieve monitoring, data acquisition, and execution control.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for regulating the power generation rate of fluid kinetic energy throughout its rotation, the method being implemented using a fluid kinetic energy full-rotation power generation system; The power generation system includes a rotating system with a spindle as the axis of rotation, a generator linked to the rotating system, and a central control console; The aforementioned mandrel has a guiding reference on it; The aforementioned rotary system includes at least one rotary unit; Each rotating unit has a rotating impeller on its main rotating body, which is parallel to the spindle, equidistant from the spindle, and distributed at equal central angles; each rotating unit is arranged on the spindle at intervals according to the radius gradient of the main rotating body. The linkage between the spindle and the wheel axle makes the rotation direction of the wheel axle the same as the revolution direction of its main rotating body, and the rotation angle β of the wheel axle is 1 / 2 of the revolution angle α of its main rotating body; Its features are, The method of this power generation rate control method is as follows: Using the plane of the guiding reference when the power generation system is in the same plane as the fluid flow direction during maximum energy conversion operation as the reference mirror of the rotating system, the angle between the reference mirror of the rotating system and the fluid flow direction, i.e. the yaw angle, is adjusted according to the corresponding offset required by the power grid side, thereby completing the adjustment of the power generation output capacity of this power generation system.

2. The method for regulating the power generation rate of fluid kinetic energy throughout its rotation according to claim 1, characterized in that, The yaw angle adjustment range is 0 to 90° or 0 to -90°.

3. The method for regulating the power generation rate of fluid kinetic energy throughout its rotation according to claim 1, characterized in that, The aforementioned guiding reference is the guiding rudder.

4. A power generation control device for implementing the fluid kinetic energy full-stroke power generation control method according to any one of claims 1-3, characterized in that, The components include a wind direction sensor, a worm gear mechanism, and a control motor; The worm gear mechanism is assembled on the spindle, wherein the worm coupling is set on the output shaft of the control motor and forms a meshing transmission pair with the worm gear fixed on the spindle; The aforementioned control motor is an execution component of the CPU execution bus of the central control console; The wind direction sensor mentioned above is the wind direction acquisition component of the central control console CPU wind direction acquisition bus.

5. The power generation rate control device according to claim 4, characterized in that, The aforementioned control motor is a servo motor.

6. The power generation rate control device according to claim 4, characterized in that, The control motor mentioned above is a stepper motor.

7. The power generation rate control device according to claim 4, characterized in that, The aforementioned worm gear mechanism is installed on the near-shaft end of the spindle.

8. The power generation rate control device according to claim 3, characterized in that, The control device is also equipped with a spindle angle sensor, which is electrically connected to the spindle angle acquisition bus of the central control panel CPU.

9. The power generation rate control device according to claim 3, characterized in that, The control device is also equipped with an anemometer, which serves as the anemometer for collecting wind speed data from the CPU's wind speed data acquisition bus in the central control unit.

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