Wind power generation device and method

Abstract

An embodiment of the present invention provides a wind power generating device and a method thereof, the wind power generating device including an acquisition unit, a wind turbine, a generator, a power storage unit, and a controller, the acquisition unit is used for acquiring a wind power value, the controller is used for the wind turbine to drive the generator to generate electricity and / or the wind turbine to drive the power storage unit to charge according to the wind power value, the driving of the wind turbine to drive the generator to generate electricity and / or the wind turbine to drive the power storage unit to charge according to the wind power value includes: when the wind power value is between a first wind power threshold and a second wind power threshold, the wind turbine drives only the generator to generate electricity, when the wind power value is greater than the second wind power threshold, the wind turbine drives both the generator and the power storage unit to charge, and when the wind power value is less than the first wind power threshold, the wind turbine drives only the power storage unit to charge or drives the power storage unit to output inductive electric energy to the outside, and the first wind power threshold is less than the second wind power threshold. The wind power generating device can convert wind energy into electrical energy and improve the output and stability of the wind power generating unit.

Description

Technical Field

[0001] (Cross - Reference to Related Applications) This application claims the benefit of Chinese Patent Application No. 202111267812.9, filed on October 29, 2021, the content of which is incorporated herein by reference.

[0002] The present invention relates to the field of renewable power, and more particularly, to a wind power generation device and method.

Background Art

[0003] Wind power generation is affected by natural conditions, and the generated electric energy is very unstable, thus affecting the stability of the power grid to which it is supplied.

[0004] To adjust the stability of wind power generation, energy storage (energy storage) devices can be installed to avoid waste caused by the power grid being unable to absorb excess power by storing part of the electric energy during peak times of wind power generation. Usually, the energy storage device is supplied with power by an AC - DC rectifier. And during the troughs of wind power generation, the energy storage device supplies auxiliary power to the power grid through a DC - AC inverter to relieve the power shortage of the power grid. There is also a method of combining a rectifier and an inverter in a four - quadrant power electronics converter.

[0005] In the prior art, a generator is required to convert the mechanical energy of a wind turbine into an alternating current, and then an AC - DC power converter is used to supply a direct current for charging and discharging the energy storage device. Usually, for an energy storage device for a distributed wind power generation unit, especially in the case of a single unit, a centralized energy storage device is rarely installed on the substation side of a wind farm, and the supported battery pack is only used as a backup power supply for the unit, and an AC / DC rectifier is also required for charging.

[0006] However, conventional energy storage methods have the drawbacks of using an AC / DC power electronics converter and generating excessive energy losses during the energy conversion process. Uncontrolled and semi-controlled power electronics converters usually generate large harmonics.

Summary of the Invention

Problems to be Solved by the Invention

[0007] An object of an embodiment of the present invention is to provide a wind power generation device and method capable of converting wind energy into electrical energy and improving the output and stability of a wind power generation unit.

Means for Solving the Problems

[0008] The wind power generation device according to the present invention includes an acquisition unit, a wind turbine, a generator, a power storage unit, and a controller. The acquisition unit is used to acquire a wind power value. The controller is used to drive the wind turbine to drive the generator to generate electricity and / or drive the wind turbine to drive the power storage unit to charge according to the wind power value. Driving the wind turbine to drive the generator to generate electricity and / or driving the wind turbine to drive the power storage unit to charge according to the wind power value includes: when the wind power value is between a first wind power threshold and a second wind power threshold, the wind turbine drives only the generator to generate electricity; when the wind power value is greater than the second wind power threshold, the wind turbine drives both the generator and the power storage unit to charge; when the wind power value is less than the first wind power threshold, the wind turbine drives only the power storage unit to charge or drives only the power storage unit to output induced electrical energy to the outside. The first wind power threshold is smaller than the second wind power threshold.

[0009] Optionally, the power storage unit includes a magnetic circuit and at least one set of storage batteries. Driving the power storage unit by the wind turbine to charge it includes relatively rotationally driving the magnetic circuit and the storage batteries by using the wind turbine to form a rotating magnetic field applied to the storage batteries, generating an induced current by the storage batteries under the action of the rotating magnetic field, and using the induced current for charging the power storage unit. The power storage unit is further connected to a power grid via an inverter and used to output induced electrical energy to the outside.

[0010] Optionally, the magnetic circuit is a rotatable magnetic circuit for generating a magnetic field surrounding the storage batteries. Driving the power storage unit by the wind turbine to charge it further includes rotationally driving the rotatable magnetic circuit and / or the storage batteries by the wind turbine to generate a rotating magnetic field.

[0011] Optionally, the shape of the storage battery is annular, or a plurality of storage batteries form an annular shape.

[0012] Optionally, the magnetic circuit includes a rotation axis and at least one pair of pole pieces. Each pair of pole pieces includes two pole pieces respectively provided above and below or on the left and right of the storage batteries for generating a magnetic field surrounding the storage batteries. The rotation axis is used to drive the storage batteries or the pole pieces to generate an induced current for charging the storage batteries with the magnetic field in the storage batteries.

[0013] Optionally, the magnetic circuit generated by the pole pieces penetrates the storage batteries, and the storage batteries form an induced potential and an induced current in the rotating magnetic field generated by the magnetic circuit.

[0014] Optionally, the magnetic field lines of the rotatable magnetic circuit are not parallel to the tangent direction of the rotation of the rotatable magnetic circuit, and the magnetic field lines of the rotatable magnetic circuit and the tangent direction of the rotation of the rotatable magnetic circuit are not perpendicular to the electrolyte separator. The storage batteries generate an induced potential under the action of the rotating magnetic field, and the direction of the induced potential coincides with the direction of the positive and negative electrodes of the storage batteries.

[0015] The present invention further includes a step of obtaining a wind power value, and a step of driving a generator by a wind turbine to generate electricity and / or driving a power storage unit by the wind turbine to charge according to the wind power value. When the wind power value is between a first wind power threshold and a second wind power threshold, the wind turbine drives only the generator to generate electricity. When the wind power value is greater than the second wind power threshold, the wind turbine drives both the generator and the power storage unit to charge. When the wind power value is less than the first wind power threshold, the wind turbine drives only the power storage unit to charge or drives only the power storage unit to output induced electrical energy to the outside. The first wind power threshold is smaller than the second wind power threshold, and a wind power generation method is proposed.

[0016] Optionally, the first wind power threshold is 2 to 5 m / s, and the second wind power threshold is 10 to 25 m / s.

[0017] Optionally, the wind power generation method further includes a step of adjusting the charging speed of the power storage unit according to the wind power value.

[0018] Optionally, the power storage unit includes a magnetic circuit and at least one set of storage batteries. The step of driving the power storage unit by the wind turbine to charge includes using the wind turbine to relatively rotate and drive the magnetic circuit and the storage batteries to form a rotating magnetic field applied to the storage batteries, and generating an induced current by the storage batteries under the action of the rotating magnetic field for charging the power storage unit. The power storage unit is further connected to the power grid through an inverter and used to output induced electrical energy to the outside.

[0019] Optionally, the magnetic circuit is a rotatable magnetic circuit for generating a magnetic field surrounding the storage batteries. The step of driving the power storage unit by the wind turbine to charge further includes generating a rotating magnetic field by rotating and driving the rotatable magnetic circuit and / or the storage batteries by the wind turbine.

[0020] Optionally, the shape of the storage battery is annular, or a plurality of storage batteries form an annular shape.

[0021] Optionally, the rotatable magnetic circuit includes a rotation axis and at least one pole piece pair. Each of the pole piece pairs includes two pole pieces respectively provided above and below or on the left and right of the storage battery for generating a magnetic field surrounding the storage battery. The rotation axis drives the storage battery or the pole piece to generate an induced current in the storage battery by the magnetic field.

[0022] Optionally, the magnetic circuit generated by the pole piece penetrates the storage battery, and the storage battery forms an induced potential and an induced current in the rotating magnetic field generated by the magnetic circuit.

[0023] Optionally, the magnetic field lines of the rotatable magnetic circuit are not parallel to the tangent direction of the rotation of the rotatable magnetic circuit, and the magnetic field lines of the rotatable magnetic circuit and the tangent direction of the rotation of the rotatable magnetic circuit are not perpendicular to the electrolyte separator. The storage battery generates an induced potential under the action of the rotating magnetic field, and the direction of the induced potential coincides with the direction of the positive and negative electrodes of the storage battery.

Advantages of the Invention

[0024] The wind power generation device of the present invention includes an acquisition unit, a wind turbine, a generator, a power storage unit, and a controller. The acquisition unit is used to acquire a wind power value. The controller is used to cause the wind turbine to drive the generator to generate electricity and / or cause the wind turbine to drive the power storage unit to charge according to the wind power value. Causing the wind turbine to drive the generator to generate electricity and / or causing the wind turbine to drive the power storage unit to charge according to the wind power value includes: when the wind power value is between a first wind power threshold and a second wind power threshold, the wind turbine drives only the generator to generate electricity; when the wind power value is greater than the second wind power threshold, the wind turbine drives both the generator and the power storage unit to charge; when the wind power value is less than the first wind power threshold, the wind turbine drives only the power storage unit to charge or drives only the power storage unit to output induced electrical energy to the outside. The first wind power threshold is smaller than the second wind power threshold. By selecting an appropriate power generation mode according to the wind power value, the wind power generation device can effectively balance the power supply to the power grid during peak and valley periods of wind power generation, and can directly convert wind power into electrolysis energy, reducing the energy conversion process and thereby reducing energy loss.

[0025] Other features and advantages of the embodiments of the present invention will be described in detail in the part of the specific embodiments below.

Brief Description of the Drawings

[0026] The drawings are provided for a better understanding of the embodiments of the present invention, form a part of the specification, and are used together with the following embodiments for implementing the invention to describe the embodiments of the present invention, but do not limit the embodiments of the present invention. In the drawings,

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying out the Invention

[0027] Hereinafter, specific embodiments of the embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the specific embodiments described in this specification are for explaining and interpreting the embodiments of the present invention, and do not limit the embodiments of the present invention.

[0028] FIG. 1 is a schematic flow chart of the wind power generation method of the present invention. As shown in FIG. 1, in step S101, a wind power value is acquired. The wind speed is the traveling speed of the wind. The greater the pressure difference between two adjacent locations, the faster the air flow, the greater the wind speed, and the greater the wind force. Therefore, usually, the wind force is used to represent the magnitude of the wind. The unit of wind speed is expressed in meters per second or kilometers per hour, and this wind power value is a wind speed value. In the present application, it is preferable that the wind turbine collects the wind power and determines the wind speed value based on the rotation of the wind turbine to acquire the wind power value. The wind power generation unit usually operates at a variable speed, and direct drive, semi-direct drive, or a speed increasing gearbox generally does not adjust the speed. In the present application, the range of the main wind power value collected by wind power generation is 2 m / s to 25 m / s.

[0029] In step S102, the wind turbine drives the generator to generate electricity according to the wind force value and / or drives the energy storage unit to charge. Specifically, when the wind force value is between the first wind force threshold and the second wind force threshold, the wind turbine drives only the generator to generate electricity; when the wind force value is greater than the second wind force threshold, the wind turbine drives both the generator and the energy storage unit to charge; when the wind force value is less than the first wind force threshold, the wind turbine drives only the energy storage unit to charge or drives only the energy storage unit to output induced electrical energy to the outside. The first wind force threshold is smaller than the second wind force threshold. At this time, if it is necessary to increase the output of the wind power plant and the energy storage capacity of the energy storage unit permits, power generation is also performed simultaneously. The first wind force threshold is preferably 2 to 5 m / s, which is the cut-in wind speed of the wind power generation unit, and the second wind force threshold is preferably 10 to 25 m / s, which is the rated wind speed of the wind power generation unit. This method can effectively solve the waste of wind power caused by excessive wind power that the generator cannot completely convert the generated power and wind power that is too small to drive the generator to generate electricity when collecting wind power for power generation. The maximum wind receiving capacity of the present invention = the maximum wind receiving capacity of the generator + the maximum wind receiving capacity of the energy storage unit.

[0030] The energy storage unit includes a magnetic circuit and at least one set of storage batteries. The wind turbine driving the energy storage unit to charge means using the wind turbine to relatively rotationally drive the magnetic circuit and the storage batteries to form a rotating magnetic field applied to the storage batteries, generating an induced current by the storage batteries under the action of the rotating magnetic field, and using it for charging the energy storage unit. The energy storage unit is further connected to the power grid through an inverter and used to output induced electrical energy to the outside. The magnetic circuit generated by the pole piece penetrates the storage battery, and the storage battery forms an induced potential and an induced current in the rotating magnetic field generated by the magnetic circuit.

[0031] The magnetic circuit is a rotatable magnetic circuit for generating a magnetic field surrounding the storage battery. The fact that the wind turbine drives the power storage unit to charge further includes driving the rotatable magnetic circuit and / or the storage battery to rotate by the wind turbine to generate a rotating magnetic field.

[0032] The shape of the storage battery is annular, or a plurality of storage batteries form an annular shape. An electrolyte separator is provided inside the storage battery. The magnetic field lines of the rotatable magnetic circuit are not parallel to the tangential direction of the rotation of the rotatable magnetic circuit, and the magnetic field lines of the rotatable magnetic circuit and the tangential direction of the rotation of the rotatable magnetic circuit are not perpendicular to the electrolyte separator. The storage battery generates an induced potential under the action of the rotating magnetic field, and the direction of the induced potential coincides with the direction of the positive and negative electrodes of the storage battery. Preferably, the magnetic field lines of the rotatable magnetic circuit are perpendicular to the tangential direction of the rotation of the rotatable magnetic circuit, and both the magnetic field lines of the rotatable magnetic circuit and the tangential direction of the rotation of the rotatable magnetic circuit are parallel to the electrolyte separator.

[0033] The storage battery (pack) may include an electrolyte containing raw materials such as a high-purity organic solvent, a lithium salt of an electrolyte, and necessary additives, and a solvent such as water prepared at a certain ratio under certain conditions. The storage battery separator may be a woven film, a non-woven film (non-woven fabric), a microporous film, a composite film, separator paper, a roll film, etc.

[0034] The case material of the storage battery may be an insulating plastic, glass, etc.

[0035] The magnetic circuit includes a rotating shaft and at least one pair of pole pieces. Each pair of pole pieces includes two pole pieces respectively provided above and below or on the left and right of the storage battery for generating a magnetic field surrounding the storage battery. The rotating shaft is used to drive the storage battery or the pole piece to generate an induced current for charging the storage battery with the magnetic field in the storage battery.

[0036] Determine the magnetic induction intensity of the magnetic circuit according to the wind force value. Specifically, it may include adjusting the feeding current to the pole piece and the magnetic body according to the magnitude of the wind force value, and adjusting the magnetic induction intensity of the magnetic circuit according to the magnitude of the wind force value. This method can reduce the loss of the magnetic circuit and maximize the utilization rate of the power storage unit.

[0037] In order to solve the drawbacks of the prior art that the structure of the power storage unit of the power supply balance device is overly complex or the energy loss in the energy conversion process is too large, the present application includes an acquisition unit for acquiring the wind force value, a generator, and a controller for driving the generator to generate electricity by the wind turbine according to the wind force value and / or driving the power storage unit to charge by the wind turbine. Driving the generator to generate electricity by the wind turbine according to the wind force value and / or driving the power storage unit to charge by the wind turbine means that when the wind force value is between the first wind force threshold and the second wind force threshold, the wind turbine drives only the generator to generate electricity; when the wind force value is greater than the second wind force threshold, the wind turbine drives both the generator and the power storage unit to charge; when the wind force value is less than the first wind force threshold, the wind turbine drives only the power storage unit to charge or drives only the power storage unit to output induced electrical energy to the outside. The first wind force threshold is smaller than the second wind force threshold, and a wind power generation device is proposed.

[0038] Specifically, FIG. 2 is a structural schematic diagram of the wind power generation device of the present invention. As shown in FIG. 2, the wind power generation device includes a wind turbine 01, a generator 02, a transmission member 03, and a power storage unit 04.

[0039] FIG. 3 is a structural schematic diagram of the power storage unit of the wind power generation of the present invention. As shown in FIG. 3, the power storage unit 04 includes a magnetic circuit and a storage battery (pack). Driving the power storage unit 04 to generate electricity by the wind force includes using the wind force to relatively rotate and drive the magnetic circuit and the storage battery (pack), forming a rotating magnetic field applied to the storage battery (pack), and generating an induced current by the storage battery (pack) under the action of the rotating magnetic field.

[0040] Specifically, the power storage unit 04 includes a rotatable magnetic circuit 11 and a storage battery. The storage battery is provided with a cathode storage battery (pack) and an anode storage battery (pack). The rotatable magnetic circuit 11 is used to generate a magnetic field surrounding the storage battery. The wind power drives the power storage unit 04 to generate electricity, that is, the wind power rotationally drives the rotatable magnetic circuit 11 and / or the storage battery to generate a rotating magnetic field. The cathode storage battery (pack) and the anode storage battery (pack) generate an induced current in the rotating magnetic field. The shape of the storage battery is annular, that is, the storage battery in the present application is preferably an annular storage battery 12. The annular storage battery 12 includes a storage battery (pack) and a storage battery separator 121. The storage battery separator 121 is used to partition the storage battery (pack) into a cathode storage battery (pack) and an anode storage battery (pack). The cathode storage battery (pack) and the anode storage battery (pack) are respectively provided with a cathode plate 122 and an anode plate 123. Each of the cathode plate 122 and the anode plate 123 is provided with a DC power output interface for outputting an induced current.

[0041] The rotatable magnetic circuit includes a rotation shaft 111 and at least one pair of pole pieces. The pole pieces are provided at both ends of the storage battery and are used to generate a magnetic field surrounding the storage battery. The rotation shaft 111 is used to drive the storage battery or the pole pieces to generate an induced current in the storage battery by the magnetic field. The rotatable magnetic circuit 11 includes a rotation shaft 111 passing through an annular hole of the annular storage battery 12 (that is, the annular hole of the annular storage battery 12), and one or a plurality of pole piece pairs (for example, a first pole piece 112 and a second pole piece 113) respectively located on both sides of the storage battery separator 121 and perpendicular to the storage battery separator 121.

[0042] One end of the transmission member 03 is connected to the wind turbine 01 in a transmissible manner, and the two torque output ends at the other end of the transmission member 03 are respectively connected to the generator 02 and the rotating shaft 111 in a transmissible manner, and are used to drive either one or both of the generator 02 and the rotating shaft 111. In actual applications, for the transmissible connection forms of the transmission member 03 to the generator 02 and the rotating shaft 111, clutch connection methods and gear meshing methods can be used. The rotating shaft 11 of the driven object can drive the pole piece pair to rotate on both sides of the annular storage battery 12. Due to this rotation, an induced potential and an induced current are generated between the storage batteries (packs) on both sides of the battery separator 121.

[0043] Both the generator 03 and the DC power output interface are used for power supply to the power grid. The mechanical energy output by the wind turbine 01 used for energy supply to the power grid fluctuates. If not adjusted, the electrical energy output by the generator 02 will also fluctuate. In the prior art, it is common to provide a storage device that stores electricity at the peak of the mechanical energy output by the wind turbine 01 to reduce the power supply to the power grid, and maintain the stability of the power supply to the power grid through auxiliary power supply by the storage device during the trough of the mechanical energy output by the wind turbine 01.

[0044] In the operating principle of electrolytic energy storage in the prior art, it is common to convert electrical energy into chemical energy by supplying power to the two electrode plates of the storage battery using a DC power source for energy storage and energy storage. That is, in the prior art, an AC / DC converter is required to convert the alternating current of the generator into direct current to charge the storage battery. As a result, there are problems such as the structure of the power supply balance device becoming complicated or the energy loss in the energy conversion process being too large.

[0045] On the one hand, in the embodiment of the present invention, instead of providing a DC power source for the storage battery, an induced potential and an induced current are directly generated between the storage batteries (packs) on both sides of the storage battery separator to cause electrolysis in the storage battery (pack). As the operating principle of the embodiment of the present invention, when the wind turbine 01 outputs mechanical energy, the rotating shaft of the rotating magnetic circuit 11 is rotationally driven by the transmission member 13. At this time, the rotatable magnetic circuit 11 rotationally drives two pole pieces respectively close to the cathode chamber and the anode chamber of the annular storage battery 12. Since the annular storage battery 12 is fixed, when the pole piece pair rotates, the rotating magnetic field between the pole piece pair is cut by the storage battery (pack) in the annular storage battery 12, whereby an induced potential and an induced current are generated in the storage battery (pack), and the storage battery (pack) undergoes an electrochemical reaction.

[0046] Figure 4 is a schematic cross-sectional structure diagram of the annular storage battery of the present invention. As shown in Figure 4, the cross-section of the annular storage battery 12 may be rectangular, or the cross-section of the annular storage battery 12 may be annular. The storage battery (pack) of the annular storage battery 12 is partitioned into a cathode chamber and an anode chamber by a storage battery separator 121. The arrangement direction of the storage battery separator 121 must conform to the two pole pieces of the pole piece pair of the rotatable magnetic circuit 11, that is, the storage battery separator 121 partitions the annular storage battery 12 into an anode chamber and a cathode chamber, and the two opposing pole pieces of the pole piece pair are respectively located on the anode chamber side and the cathode chamber side. In this way, when the pole piece pair rotates, the magnetic field lines of the magnetic field between the pole piece pair are cut by the storage battery (pack) in the annular storage battery 12.

[0047] Figure 5 is a schematic diagram of the operating principle of the annular storage battery of the present invention. As shown in Figure 5, when the pole piece pair rotates, the storage battery (pack) in the annular storage battery 12 moves in the magnetic field (magnetic induction intensity B) between the two pole pieces. Regarding this movement, the relative speed is set as v, and it is perpendicular to the magnetic field lines. Since the storage battery (pack) is conductive, an induced potential

[0048]

Equation

[0049] occurs, and induced electrolysis

[0050] [Number]

[0051] Due to the action of, cations in the storage battery (pack) move to the cathode, anions move to the anode, and the current density J generated thereby is

[0052] [Number]

[0053] as follows.

[0054] In the storage battery (pack) in the annular storage battery 12, electrolytic reactions occur at the cathode and the anode respectively. Different from the external DC power supply in the prior art, the electric field in the present invention is generated inside the storage battery (pack), while in the prior art, it depends on the DC power supply applied from the outside. Note that the magnetic body in the present invention may be a permanent magnetic body or an electromagnetic body, but the permanent magnetic body is preferably a high-energy storage permanent magnetic body.

[0055] Furthermore, when the magnetic body is an electromagnetic body, an electromagnetic control unit (not shown) for controlling the electrolysis rate of the storage battery (pack) by adjusting the magnetic induction intensity of the magnetic body may be further provided. That is, adjusting the charging rate of the storage unit according to the wind power value may specifically be adjusting the feeding current of the electromagnetic body according to the wind power value to adjust the magnetic induction intensity of the magnetic circuit. Preferably, the anode plate and the cathode plate can also monitor the voltage of the storage battery by providing an external voltage monitoring unit (not shown) and reflect the degree of charging.

[0056] FIG. 6 is a schematic structural diagram of the sub-cavities of the annular battery of the present invention. As shown in FIG. 6, the cavity of the annular battery 12 of the present invention may include a plurality of sub-cavities 201 that are independent of each other (i.e., a plurality of batteries or battery packs can be obtained by the plurality of sub-cavities 201). Each sub-cavity 201 is provided with a battery separator 121, a cathode plate 122, and an anode plate 123. Each such sub-cavity can function as an independent sub-battery. In the present invention, the number and size of the sub-cavities can be set by those skilled in the art as needed and are not particularly limited herein. The transmission member may include a rotational speed transmission mechanism (not shown), and the rotational speed transmission mechanism is provided between the wind turbine and the rotating shaft and is used to control the rotational speed of the rotating shaft. For the output of alternating current to the power grid, an inverter (not shown) may be connected to the direct current output interface.

[0057] As described above, in the wind power generation device according to the present invention, the battery is annular, and a rotatable magnetic circuit capable of generating an induced potential and an induced current is provided in the battery (pack) between the cathode chamber and the anode chamber of the annular battery during rotation. Thereby, when a transmission member that is drivably connected to the wind turbine is provided, an induced potential and an induced current for electrolyzing and storing electricity in the battery (pack) can be generated in the battery (pack) by the drive of the mechanical energy of the wind turbine. In the present invention, since the battery does not require a direct current power source, the mechanical energy of the wind turbine can be converted into electrolytic energy, thereby reducing the energy conversion process, effectively simplifying the structure of the energy storage device, and reducing the energy loss associated with energy conversion. In the present invention, the battery separator 121 may be parallel to the axial direction of the rotating shaft. In this case, it is possible to partition the battery into an anode chamber on the inner peripheral wall side of the annular battery 12 and a cathode chamber on the outer peripheral wall side of the annular battery 12 (see FIG. 4). Further, depending on the rotation direction of the rotatable magnetic circuit 11, it is also possible to partition the battery into a cathode chamber on the inner peripheral wall side of the annular battery 12 and an anode chamber on the outer peripheral wall side of the annular battery 12.

[0058] To adapt the pole piece to the battery separator 121, the structure of the rotatable magnetic circuit 11 may be configured as follows. The rotation axis 111 penetrates through an annular hole surrounded by the annular battery 12 as a magnetic body, and one pair or a plurality of pairs of pole pieces (for example, the disk-shaped first pole piece 112 and the second pole piece 113) are provided at the upper and lower ends of the rotation axis 111 respectively. The annular battery 12 is located between the pole piece pairs. Preferably, the outer edge of the disk-shaped pole piece conforms to the outer edge of the annular battery 12.

[0059] The magnetic field B applied by the rotatable magnetic circuit 11 is perpendicular to the battery, and the magnetic field rotates due to its rotation. Let the magnetic induction intensity of the rotatable magnetic circuit 11 in the battery be B and the rotational linear velocity be v. Since the battery (pack) is relatively stationary and the magnetic field is relatively moving, the direction of v in the calculation formula of induced electrolysis is opposite to the moving direction of the magnetic field. Taking Figure 1 as an example, the direction of induced electrolysis is from the inner ring to the outer ring. Therefore, the inner peripheral wall side of the annular battery 12 is the anode chamber of the battery, and the outer peripheral wall side is the cathode chamber of the battery. That is, regarding the annular battery 12, as shown in Figure 5, anodic reaction occurs on the inner side and cathodic reaction occurs on the outer side.

[0060] Figure 7 is a schematic diagram of another wind power generation device of the present invention. As shown in Figure 7, the battery separator 121 may be perpendicular to the axial direction of the rotation axis. In this case, it becomes possible to partition the battery into the anode chamber on the upper end side of the annular battery 12 and the cathode chamber on the lower end side of the annular battery 12 (see Figure 5). Furthermore, depending on the rotation direction of the rotatable magnetic circuit 11, it is also possible to partition the battery into the cathode chamber on the upper end side of the annular battery 12 and the anode chamber on the lower end side of the annular battery 12.

[0061] To adapt the pole piece pair to the battery separator 121, the structure of the rotatable magnetic circuit 11 may be configured as follows. The rotation axis 111 passes through a circular hole surrounded by the annular battery 12 as one of the pole pieces of the pole piece pair of the rotatable magnetic circuit, and an annular magnetic body is fitted on the upper end of the rotation axis. Another tubular pole piece is externally fitted to the outer edge of the annular magnetic body. The annular battery 12 is located between the two pole pieces.

[0062] When the rotatable magnetic circuit in FIG. 7 rotates counterclockwise, the direction of the magnetic field lines becomes horizontal and inward, and the direction of the induced electric field generated in the battery (pack) (taking the electrolysis of water as an example) is from top to bottom. The upper side of the battery becomes the anode chamber, and the lower side of the battery becomes the anode chamber. The central annular battery (pack) separator 121 isolates the generated gas and establishes an internal electric field.

[0063] The present invention further provides a wind power generation system including a control mechanism for controlling a transmission member to couple to and separate from a rotation axis and / or a generator, and the output balance device for wind power generation described in the above embodiments.

[0064] The two torque output ends at the other end of the transmission member are respectively transmission-connected to the generator and the rotation axis in a transmissible manner, and drive one or both of the generator and the rotation axis. Specifically, one end of the transmission member is transmission-connected to the wind turbine, whereby the power of the wind turbine can be transmitted. The other end of the transmission member includes two torque output ends, and the two torque output ends are respectively transmission-connected to the generator and the rotation axis in a transmissible manner. The connection method of the torque output end to the generator or the rotation axis may be a controllable connection, that is, the generator or the rotation axis may be driven by the torque output end through a contact connection as required, and the drive by the torque output end may be released by a separation method as required.

[0065] In actual application, when the mechanical energy output by the wind turbine 01 reaches its peak, the rotating shaft is driven by the torque output end through contact connection, reducing the power supply to the power grid by the power storage in the storage battery (pack) within the annular storage battery 12. When the mechanical energy output by the wind turbine 01 is at its trough, the rotating shaft is separated from the torque output end, maintaining the stability of the power supply to the power grid through the auxiliary power supply by the power supply balancing device.

[0066] In the present invention, the energy storage device is directly linked to the wind turbine. Instead of providing a DC power source to output mechanical energy from the wind turbine, an induced potential and an induced current are directly generated between the storage batteries (packs) on both sides of the battery separator to charge the storage battery (pack). As a specific operating principle, when the wind turbine outputs mechanical energy, the rotating shaft of the rotating magnetic circuit 11 is rotationally driven by the transmission member 13. At this time, the rotatable magnetic circuit 11 rotationally drives two pole piece pairs respectively close to the cathode chamber and the anode chamber of the annular storage battery 12. Since the annular storage battery 12 is fixed, when the pole piece pair rotates, the rotating magnetic field between the pole piece pairs cuts the magnetic force lines by the storage battery (pack) within the annular storage battery 12, thereby generating an induced potential and an induced current in the storage battery (pack), and causing an electrochemical reaction in the storage battery (pack).

[0067] Preferably, in the embodiment of the present invention, it may further include a processing unit that generates control commands of the control mechanism according to the direct power supply data and pre-set rules, and a monitoring unit that collects the direct power supply data of the generator in real time.

[0068] In the embodiment of the present invention, the direct power supply data refers to the power supply data from the generator to the power grid. Through the direct power supply data, it is determined according to pre-set rules whether power storage is required and whether auxiliary power supply to the power grid is required, generating corresponding control commands to determine the connection state between the two torque output ends and the generator or the rotating shaft, and the connection state between the DC power output interface and the power grid.

[0069] Furthermore, in an embodiment of the present invention, an electrolysis control unit (not shown) may be further included. The electrolysis control unit includes a monitoring assembly that monitors the electrolysis reaction rate of the storage battery (pack), and a processing unit that generates a control command for the rotation speed of the speed change mechanism according to the electrolysis reaction rate, thereby stabilizing the power storage process and reducing the fluctuation of the electrolysis reaction.

[0070] Example 1 Specific implementation parameters of the acquisition unit and the generator of the wind power generation device of the present invention are shown in Tables 1 to 3 below, and its wind speed and drive power curve are shown in FIG. 8.

[0071] [Table 1]

[0072] [Table 2]

[0073] [Table 3]

[0074] Example 2 Specific implementation parameters of the acquisition unit and the generator of the wind power generation device of the present invention are shown in Tables 4 to 6 below, and its wind speed and drive power curve are shown in FIG. 9.

[0075] [Table 4]

[0076] [Table 5]

[0077] [Table 6]

[0078] Example 3 Theoretical calculation data: induced potential = E = B * l * v; Test data of the present application: magnetic induction intensity B = 0.15 T, rotation speed v = 1 m / s, diameter of the conductor d = 10 cm, induced voltage E(U) = 5 mV.

[0079] As described above, the test results of the present application are consistent with the theoretical data.

[0080] The present invention also provides an output balancing device for wind power generation. The output balancing device includes a wind turbine, a generator, a transmission member, and a power storage unit. The power storage unit includes a rotatable magnetic circuit and an annular battery. The annular battery is provided with a battery (pack). The annular battery includes a battery separator. The battery separator is used to partition the battery (pack) into a cathode chamber and an anode chamber. A cathode plate and an anode plate are respectively provided in the cathode chamber and the anode chamber. A DC power output interface is provided on each of the cathode plate and the anode plate. The rotatable magnetic circuit includes a rotating shaft passing through the annular hole of the annular battery, and one or more pairs of pole pieces respectively located on both sides of the battery separator and perpendicular to the battery separator. One end of the transmission member is transmission-connected to the wind turbine in a transmissible manner. Two torque output ends at the other end of the transmission member are transmission-connected to the generator and the rotating shaft in a transmissible manner respectively, and are used to drive either one or both of the generator and the rotating shaft. The driven rotating shaft can drive the pole piece pair to rotate on both sides of the annular battery. Induced potential and induced current are generated between the batteries (packs) on both sides of the battery separator due to the rotation. Both the generator and the DC power output interface are used for power supply to the power grid.

[0081] Preferably, in the present invention, when the battery separator is parallel to the axial direction of the rotating shaft and partitions the battery (pack) into an inner side and an outer side, the structure of the rotatable magnetic circuit is as follows. The rotating shaft penetrates a circular hole surrounded by the annular battery as a magnetic body, and pole pieces are provided at each of the upper end and the lower end of the rotating shaft, obtaining a pair of pole pieces, and the annular battery is positioned between the pair of pole pieces.

[0082] Preferably, in the present invention, the pole piece is disk-shaped, and its outer edge conforms to the outer edge of the annular groove.

[0083] Preferably, in the present invention, the magnetic body includes a permanent magnet or an electromagnet.

[0084] Preferably, in the present invention, the permanent magnet is a high-energy storage permanent magnet.

[0085] Preferably, in the present invention, when the magnetic body is an electromagnet, it further includes an electromagnetic control unit that adjusts the electromagnetic intensity of the magnetic body to control the electrolysis rate of the battery (pack).

[0086] Preferably, in the present invention, the annular battery includes a plurality of sub-cavities independent of each other, and a battery separator, a cathode plate, and an anode plate are provided in each of the sub-cavities.

[0087] Preferably, in the present invention, the transmission member further includes a speed change mechanism for the rotational speed, and the speed change mechanism for the rotational speed is provided between the wind turbine and the rotating shaft and is used to control the rotational speed of the rotating shaft.

[0088] Preferably, in the present invention, an inverter is further provided between the DC power output interface and the power grid.

[0089] In another aspect of the present invention, there is provided an output balance system for wind power generation, including the above-mentioned output balance device for wind power generation and a control mechanism, wherein the control mechanism is used to control a transmission member to be coupled to and separated from the rotating shaft and / or the generator.

[0090] Preferably, in the present invention, it further includes a processing unit for generating a control command for the control mechanism according to the direct power supply data and pre-established rules, and a monitoring unit for collecting the direct power supply data of the generator in real time.

[0091] Compared with the prior art, the present invention has the following beneficial effects.

[0092] As can be seen from the above embodiments, in the output balance device for wind power generation according to the present invention, the power storage unit includes a rotatable magnetic circuit and an annular battery. When the rotatable magnetic circuit rotates, an induced potential and an induced current are generated in the battery (pack) between the cathode chamber and the anode chamber of the annular battery. Thereby, when a transmission member that can be transmission-connected to the wind turbine is provided, an induced potential and an induced current for electrolyzing the battery (pack) in the battery (pack) are generated by the drive of the mechanical energy of the wind turbine, whereby the mechanical energy is directly converted into chemical energy and power storage is realized.

[0093] The battery according to the present invention can directly convert the mechanical energy of the wind turbine into electrolytic energy without the need for a DC power source, thereby reducing the energy conversion process, effectively simplifying the structure of the power storage device, and reducing the energy loss associated with energy conversion.

[0094] As described above, with reference to the drawings, any embodiment of the embodiments of the present invention has been described in detail. However, the embodiments of the present invention are not limited to the specific details of the above embodiments. Within the scope of the technical idea of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention within the protection scope of the embodiments of the present invention.

[0095] In addition, each of the specific technical features described in the above specific embodiments may be combined in any appropriate manner as long as there is no conflict. To avoid unnecessary duplication, the embodiments of the present invention do not specifically describe various possible combination methods.

[0096] In addition, the term "comprising", "including", or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, commodity, or device that includes a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, commodity, or device. Without further limitation, the term "comprising one..." does not exclude the presence of other identical elements in the process, method, commodity, or device that includes the element.

[0097] The above are only examples of the embodiments of the present application and do not limit the present application. Various changes and modifications may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Explanation of Reference Numerals

[0098] 01 Wind turbine 02 Generator 03 Transmission member 04 Power storage unit 111 Rotating shaft 112 First pole piece 113 Second pole piece 11 Rotatable magnetic circuit 12 Ring-shaped battery 121 Battery separator 122 Cathode plate 123 Anode plate 201 Sub-cavity

Claims

1. A wind power generation device, comprising an acquisition unit, a wind turbine, a generator, a power storage unit, and a controller, wherein the acquisition unit is used to acquire a wind power value, and the controller is used to cause the wind turbine to drive the generator to generate electricity and / or cause the wind turbine to drive the power storage unit to charge according to the wind power value, causing the wind turbine to drive the generator to generate electricity and / or causing the wind turbine to drive the power storage unit to charge according to the wind power value means that when the wind power value is between a first wind power threshold and a second wind power threshold, the wind turbine drives only the generator to generate electricity, when the wind power value is greater than the second wind power threshold, the wind turbine drives both the generator and the power storage unit to charge, when the wind power value is less than the first wind power threshold, the wind turbine drives only the power storage unit to charge or drives only the power storage unit to output induced electrical energy to the outside, and the first wind power threshold is less than the second wind power threshold. A wind power generation device characterized by this.

2. The power storage unit includes a magnetic circuit and at least one set of storage batteries, wherein causing the wind turbine to drive the power storage unit to charge means using the wind turbine to relatively rotationally drive the magnetic circuit and the storage battery to form a rotating magnetic field applied to the storage battery, and generating an induced current by the storage battery under the action of the rotating magnetic field for use in charging the power storage unit, and the power storage unit is further connected to a power grid via an inverter and used to output induced electrical energy to the outside. The wind power generation device according to claim 1, characterized by this.

3. The magnetic circuit is a rotatable magnetic circuit for generating a magnetic field surrounding the storage battery, and causing the wind turbine to drive the power storage unit to charge further includes using the wind turbine to rotationally drive the rotatable magnetic circuit and / or the storage battery to generate a rotating magnetic field. The wind power generation device according to claim 2, characterized by this.

4. The shape of the storage battery is annular or a plurality of storage batteries form an annular shape. The wind power generation device according to claim 2, characterized by this.

5. The magnetic circuit includes a rotation axis and at least one pair of pole pieces, and each pair of pole pieces includes two pole pieces respectively provided above and below or on the left and right of the storage battery for generating a magnetic field surrounding the storage battery. The rotating shaft is used to drive the storage battery or the pole piece to generate an induced current for charging the storage battery by the magnetic field in the storage battery, and is characterized in that it is used in any one of claims 2 to 4. The wind power generation device described.

6. The magnetic circuit generated by the pole piece penetrates the storage battery, and the storage battery forms an induced potential and an induced current in the rotating magnetic field generated by the magnetic circuit. The wind power generation device described.

7. The magnetic field lines of the rotatable magnetic circuit are not parallel to the tangential direction of the rotation of the rotatable magnetic circuit, and the magnetic field lines of the rotatable magnetic circuit and the tangential direction of the rotation of the rotatable magnetic circuit are not perpendicular to the electrolyte separator. The storage battery generates an induced potential under the action of a rotating magnetic field, and the direction of the induced potential coincides with the direction of the positive and negative electrodes of the storage battery. The wind power generation device described.

8. A wind power generation method, The step of obtaining the wind power value; The step of driving the generator by the wind turbine to generate electricity according to the wind power value, and / or driving the storage unit by the wind turbine to charge, When the wind power value is between the first wind power threshold and the second wind power threshold, the wind turbine drives only the generator to generate electricity; When the wind power value is greater than the second wind power threshold, the wind turbine drives both the generator and the storage unit to charge; When the wind power value is less than the first wind power threshold, the wind turbine drives only the storage unit to charge, or drives only the storage unit to output induced electrical energy to the outside. Steps, including steps, The first wind power threshold is smaller than the second wind power threshold, and is characterized by the wind power generation method.

9. The first wind power threshold is 2 to 5 m / s, and the second wind power threshold is 10 to 25 m / s. The wind power generation method described.

10. The method further includes the step of adjusting the charging speed of the storage unit according to the wind power value. The wind power generation method described.

11. The storage unit includes a magnetic circuit and at least one set of storage batteries. The wind turbine drives the storage unit to charge, Using a wind turbine to relatively rotationally drive the magnetic circuit and the storage battery to form a rotating magnetic field applied to the storage battery, generating an induced current by the storage battery under the action of the rotating magnetic field, and using the induced current for charging the power storage unit. The method for wind power generation according to claim 8, wherein the power storage unit is further connected to a power grid via an inverter and used to output induced electrical energy to the outside.

12. The magnetic circuit is a rotatable magnetic circuit for generating a magnetic field surrounding the storage battery. The wind turbine driving the power storage unit to charge. The method for wind power generation according to claim 11, further comprising generating a rotating magnetic field by rotationally driving the rotatable magnetic circuit and / or the storage battery by the wind turbine.

13. The method for wind power generation according to claim 11, wherein the shape of the storage battery is annular or a plurality of storage batteries form an annular shape.

14. The rotatable magnetic circuit includes a rotation axis and at least one pair of pole pieces. Each pair of pole pieces includes two pole pieces respectively provided above and below or on the left and right of the storage battery for generating a magnetic field surrounding the storage battery. The method for wind power generation according to claim 12, wherein the rotation axis drives the storage battery or the pole piece to generate an induced current in the storage battery by the magnetic field.

15. The magnetic circuit generated by the pole piece penetrates the storage battery, and the storage battery forms an induced potential and an induced current in the rotating magnetic field generated by the magnetic circuit. The method for wind power generation according to claim 14, characterized in that.

16. The magnetic field lines of the rotatable magnetic circuit are not parallel to the tangent direction of the rotation of the rotatable magnetic circuit, and the magnetic field lines of the rotatable magnetic circuit and the tangent direction of the rotation of the rotatable magnetic circuit are not perpendicular to the electrolyte separator. The storage battery generates an induced potential under the action of the rotating magnetic field, and the direction of the induced potential coincides with the direction of the positive and negative electrodes of the storage battery. The method for wind power generation according to claim 12, characterized in that.

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