A photovoltaic grid-connected power fluctuation suppression device

Abstract

The application discloses a photovoltaic grid-connected power fluctuation suppression device and belongs to the technical field of photovoltaic grid-connected power fluctuation suppression.The device comprises a base mechanism, a shell mechanism and a cover mechanism, the base mechanism comprises a base body, a control box is fixed on the base body, the base mechanism is fixed with the shell mechanism, a driving mechanism is fixedly installed on the shell mechanism, and the driving mechanism comprises a speed reducer.The pendulum rod cooperates with the counterweight block to form a pendulum hammer type mechanical energy storage structure, so that the power fluctuation in the photovoltaic grid-connected process can be suppressed in real time without relying on a large-capacity electrochemical energy storage device, and the equipment investment and the later maintenance cost are greatly reduced.The integrated rack shell layout is adopted, the sealing cover, the vacuum valve and the observation structure are arranged at the same time, the internal cavity can be kept clean and airtight and the dust and water vapor erosion can be reduced, and the air resistance of swinging can be reduced.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic grid-connected power fluctuation suppression technology, and specifically relates to a photovoltaic grid-connected power fluctuation suppression device. Background Technology

[0002] Photovoltaic power generation relies on the photovoltaic effect of semiconductors to directly convert solar energy into electrical energy. It has the advantages of being clean and low-carbon, flexible in construction, and adaptable to a wide range of scenarios. However, its output power is easily affected by sunlight intensity, weather changes, and day-night cycles, exhibiting significant randomness and intermittency. After grid connection, it can easily cause problems such as grid voltage frequency deviation, power harmonic distortion, and voltage flicker, posing a threat to the stable operation of the power system. Currently, there are three main methods for suppressing photovoltaic grid-connected power fluctuations: first, electrochemical energy storage, which relies on the charging and discharging levels of lithium batteries and supercapacitors to suppress power fluctuations, but suffers from limited lifespan, thermal runaway risk, and high operation and maintenance costs; second, frequency regulation of traditional units such as thermal power and hydropower, which adjusts output to adapt to photovoltaic fluctuations, but has a lagging response and high energy consumption; and third, algorithm optimization and inverter control, which rely on active and reactive power regulation strategies to smooth output, but can only suppress fluctuations slightly and has limited adaptability. In addition, there are mechanical energy storage methods such as pumped storage and traditional flywheel energy storage.

[0003] While the above methods can mitigate grid-connected photovoltaic power fluctuations and alleviate grid voltage and frequency deviations to some extent, ensuring basic grid-connected operation of photovoltaic power, they also have the following drawbacks:

[0004] 1. Electrochemical energy storage requires a large number of batteries, which have the disadvantages of short service life and high maintenance costs. It also poses a risk of thermal runaway and the investment cost for large-scale deployment is high.

[0005] 2. Traditional thermal and hydropower units have a slow frequency regulation response, which cannot match the instantaneous fluctuation characteristics of photovoltaic power, resulting in high energy consumption and serious resource waste during the regulation process;

[0006] 3. Inverter algorithm control can only achieve small-amplitude power smoothing and has limited ability to suppress fluctuations. Pumped storage and traditional flywheel energy storage have large land areas, long construction periods, and poor layout flexibility, making them difficult to adapt to the decentralized and miniaturized application scenarios of distributed photovoltaics. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a photovoltaic grid-connected power fluctuation suppression device.

[0008] The technical solution adopted to solve the above-mentioned technical problems is: a photovoltaic grid-connected power fluctuation suppression device, including a base mechanism, a housing mechanism, and a cover mechanism. The base mechanism includes a base body, on which a control box is fixed. The housing mechanism is fixed on the base mechanism, and a drive mechanism is fixedly installed on the housing mechanism. The drive mechanism includes a reducer, on which a brake motor is fixed at the input end of the reducer, and a spring is sleeved on the output shaft of the reducer. A first toothed half-coupling is slidably connected to the output shaft of the reducer. An annular groove is integrally formed on the first toothed half-coupling. A clutch control mechanism is fixed inside the housing mechanism. The clutch control mechanism includes an electric push rod and a hinge frame. A telescopic shaft is fixed at the output end of the electric push rod, and a shift fork is rotatably connected to the hinge frame.

[0009] A transmission mechanism is fixed on the housing mechanism. The transmission mechanism includes a fixed seat, a fixed frame is integrally welded on the fixed seat, a first rotating shaft is rotatably connected to the inner side of the fixed frame, a first spur gear is coaxially fixed to one end of the first rotating shaft, and a second toothed half-coupling is coaxially fixed to the other end of the first rotating shaft.

[0010] A mechanical energy storage mechanism is rotatably connected to the inner side of the housing mechanism. The mechanical energy storage mechanism includes a second rotating shaft, on which a second spur gear is coaxially fixed. A pendulum is also fixed on the second rotating shaft, and a counterweight is fixed to the end of the pendulum. A power generation mechanism is fixed on the housing mechanism. The power generation mechanism includes a speed-increasing gearbox. A third rotating shaft is fixed to the input end of the speed-increasing gearbox. An overrunning clutch gear and a flywheel are coaxially fixed on the third rotating shaft. A permanent magnet synchronous generator is fixed to the output end of the speed-increasing gearbox. A cover mechanism is fixed on the housing mechanism.

[0011] Furthermore, a mounting bracket is fixed on the base body, and a real-time power sampling sensor and an electronic control switch are installed inside the control box.

[0012] Through the above technical solution, the base body can provide a stable mounting foundation for the control box and the mounting bracket. The control box is fixed on the base body to achieve a compact layout of the overall structure. The mounting bracket can be used for the subsequent assembly and fixing of related transmission and power components of the whole machine. At the same time, the real-time power sampling sensor and electric control switch installed inside the control box can collect the operating power parameters of the equipment in real time and cooperate with the electric control switch to realize the automatic control of circuit on / off and working status. Relying on the integrated fixing effect of the base body, the overall assembly integrity and operational stability of the whole machine can be improved.

[0013] Furthermore, the housing mechanism includes a housing body fixed on a mounting bracket, a first bearing and a second bearing fixed on the housing body, an infrared sensor and a one-way vacuum valve fixed on the inner side of the housing body, and a positioning sleeve integrally formed on the inner side of the housing body.

[0014] Through the above technical solution, the housing body is stably mounted on the mounting frame. The first and second bearings can provide coaxial support for the internal rotating components and reduce rotational wear. The infrared sensor installed on the inner side of the housing body can detect the running position and working status of the internal components in real time. The one-way vacuum valve is a preferred configuration, which allows the operator to perform vacuuming inside the device according to the actual working conditions. At the same time, it can maintain stable internal air pressure and prevent external airflow from flowing back. The positioning sleeve integrally formed by the housing body can achieve precise insertion and limiting of the internal components, simplifying the assembly process and improving the positioning accuracy and operational stability of the overall structure.

[0015] Furthermore, the output shaft of the brake motor is integrally formed with a key, which enables the first toothed half coupling to rotate synchronously with the output shaft of the brake motor.

[0016] Through the above technical solutions, the reducer can adjust the speed and amplify the torque of the power output by the brake motor. The brake motor can automatically lock the shaft when the power is cut off to prevent the equipment from accidentally reversing and slipping. The spring set on the output shaft of the reducer can play an axial buffer and elastic pushing role. The shaft key integrally formed by the output shaft of the brake motor can realize the circumferential limit transmission between the first toothed half coupling and the output shaft of the brake motor, ensuring that the two rotate synchronously without relative slippage, making the power transmission more stable and reliable and the structural assembly more compact and regular.

[0017] Furthermore, the electric push rod and the hinge frame are both fixed to the housing body, the telescopic shaft is slidably connected to one end of the shift fork, and the other end of the shift fork is embedded in the annular groove and rotatably connected to the annular groove.

[0018] With the above technical solution, both the electric push rod and the hinge frame are fixed to the housing body, ensuring that the clutch control mechanism is firmly installed and neatly arranged. The electric push rod achieves linear extension and retraction through the telescopic shaft and forms a sliding engagement with the shift fork to transmit push and pull power. The shift fork can swing axially along the output shaft of the reducer. The other end of the shift fork is embedded in the annular groove and forms a rotational connection with it. It can drive the axial sliding while rotating relative to the annular groove. When the electric push rod retracts, the telescopic shaft drives the end of the shift fork to swing towards the second toothed half-coupling, thereby making the first toothed half-coupling engage with the second toothed half-coupling. Conversely, when the electric push rod extends, the shift fork drives the first toothed half-coupling to separate from the second toothed half-coupling, thereby realizing the automatic engagement and disengagement control of the clutch structure. The overall transmission is smooth, the action response is sensitive, and the positioning is stable and reliable.

[0019] Furthermore, the fixing seat is fixed to the housing body, and the second toothed half-coupling is coaxially aligned with the first toothed half-coupling.

[0020] Through the above technical solution, the fixed base and the housing body are fixedly connected to achieve the overall positioning and structural stability of the transmission mechanism. The fixed frame is integrally welded to the fixed base, which can improve its own structural strength and overall rigidity. The inner side of the fixed frame forms a rotational support limit for the first rotating shaft, ensuring the coaxiality and rotational stability of the first rotating shaft during operation. The first flat gear and the second toothed half-coupling are coaxially fixed at both ends of the first rotating shaft, which can realize the synchronous transmission of torque. The second toothed half-coupling and the first toothed half-coupling are kept coaxially aligned, which can ensure that the two are precisely meshed and connected in the future, so that the power can be smoothly and reliably transmitted from the drive end to the transmission end, effectively reducing transmission offset and meshing jamming, and improving the transmission accuracy and operation stability of the whole machine.

[0021] Furthermore, the second rotating shaft is fixed to the inner ring of the first bearing, and the second spur gear meshes with the first spur gear.

[0022] Through the above technical solution, the second rotating shaft and the inner ring of the first bearing are fixed to each other, providing reliable rotational support for the second rotating shaft and ensuring its smooth rotation process. The second spur gear is coaxially fixed on the second rotating shaft and meshes with the first spur gear for transmission. The pendulum rod and the counterweight together form an integrated pendulum structure, which can store and release mechanical potential energy by relying on gravity and rotational inertia. When the photovoltaic grid power increases, the brake motor starts running, and the power is connected sequentially through the first and second toothed half-couplings, and then the first spur gear drives the second spur gear. The rotation of the wheel drives the second shaft to rotate and causes the pendulum to rotate upward, thereby lifting the counterweight to store gravitational potential energy. When the power of the photovoltaic grid decreases, the clutch control mechanism is activated in time, causing the first and second jaw couplings to separate, releasing the rigid connection of the power transmission link. The brake motor no longer locks the entire transmission system. At this time, the pendulum and the counterweight will swing downward naturally under their own weight, which will drive the second flat gear to rotate in the opposite direction, converting the previously stored gravitational potential energy into mechanical kinetic energy and outputting it to the power generation mechanism in the opposite direction.

[0023] Furthermore, the speed-increasing gearbox is fixed to the housing body, and the overrunning clutch gear is an external gear type overrunning clutch gear, which meshes with the second spur gear.

[0024] Through the above technical solution, the speed-increasing gearbox is fixedly installed on the housing body, which can realize the overall positioning and assembly of the power generation mechanism and the structural stability. The third rotating shaft is connected to the input end of the speed-increasing gearbox and can stably transmit the input power. The external gear-type overrunning clutch gear and flywheel coaxially arranged on the third rotating shaft can rotate synchronously with the rotating shaft. The overrunning clutch gear meshes with the second flat gear, which can smoothly receive the rotational power released by the mechanical energy storage mechanism and realize unidirectional transmission, avoiding the reverse drag of power and causing damage to the components. The flywheel can use its own rotational inertia to smooth the speed fluctuation and maintain the smooth operation of the transmission process. The speed-increasing gearbox can speed up the input speed and increase the output torque, and then transmit the power to the permanent magnet synchronous generator, which completes the conversion of mechanical energy into electrical energy.

[0025] Furthermore, the cover mechanism includes a cover body that is sealed to the housing body, a third bearing is fixed to the inner side of the cover body, and the end of the second rotating shaft is fixed to the inner ring of the third bearing.

[0026] Through the above technical solution, the cover body and the shell body form a sealed connection, which can form a closed protection for the inner cavity of the shell, effectively blocking external dust and water vapor from entering the cavity, ensuring the working environment of the internal transmission and sensing components. The third bearing installed on the inner side of the cover body forms a front and rear double support structure with the first bearing. The end of the second rotating shaft is fixedly engaged with the inner ring of the third bearing, which can further improve the assembly coaxiality and rotation support stability of the second rotating shaft, reduce the radial runout and running wear when the rotating shaft rotates at high speed, and at the same time maintain the inner cavity in a sealed state in conjunction with the overall sealing structure, which is suitable for the equipment's vacuum protection and long-term stable operation requirements.

[0027] Furthermore, an observation window is embedded and fixed on the cover body, and a positioning stop is fixed on the inner side of the cover body, with the end of the positioning stop being inserted into a positioning sleeve.

[0028] Through the above technical solution, the observation window embedded in the cover body allows staff to intuitively observe the swing condition of the swing rod and counterweight inside the shell body, as well as the meshing operation of each gear. Internal condition inspection can be completed without disassembling the equipment. The end of the positioning stop rod arranged on the inner side of the cover body and the positioning sleeve form a plug-in fit, which can realize the precise alignment and limit of the cover body and the shell body during assembly, improve the overall assembly accuracy and structural connection strength. At the same time, the positioning stop rod can physically limit the maximum swing stroke of the swing rod, avoid collision interference due to excessive swing angle of the swing rod, and ensure the stable movement trajectory of the internal mechanism and safe and reliable operation.

[0029] The beneficial effects of this invention are as follows:

[0030] 1. This invention constructs a pendulum-type mechanical energy storage structure by setting a pendulum rod in conjunction with a counterweight. It utilizes the power fluctuations of the photovoltaic grid to convert surplus electrical energy into gravitational potential energy for storage and releases potential energy to generate electricity when there is a power shortage. It can smooth out power fluctuations during the photovoltaic grid connection process in real time, without relying on large-capacity electrochemical energy storage devices, which significantly reduces equipment investment and subsequent maintenance costs. At the same time, it adopts a jaw clutch structure in conjunction with an electric push rod to automatically control the engagement and disengagement, realizing precise switching between energy storage and energy release conditions. It has a high degree of automation and rapid response.

[0031] 2. This invention features an integrated frame housing layout, internally incorporating gear meshing transmission, a one-way clutch, and a speed-increasing power generation component. Combined with a front and rear dual-bearing support structure, it enhances the coaxiality and stability of the rotating shaft. Furthermore, it includes a sealed cover, a vacuum valve, and an observation structure. These features ensure the internal cavity remains clean and sealed, reducing dust and moisture erosion, allowing for real-time monitoring of the internal operating status, and reducing air resistance during oscillations. The self-locking characteristic of the brake motor prevents accidental reverse rotation of the mechanism. The overall structure is compact and rationally designed, with smooth and reliable transmission, making it suitable for the long-term, continuous, and stable power regulation requirements of photovoltaic power plants. Attached Figure Description

[0032] Figure 1 This is a first-view structural diagram of the present invention;

[0033] Figure 2 This is a second-view structural diagram of the present invention;

[0034] Figure 3 This is a three-dimensional sectional view of the present invention;

[0035] Figure 4 This is a schematic diagram of the base mechanism of the present invention;

[0036] Figure 5 This is a schematic diagram of the housing mechanism of the present invention;

[0037] Figure 6 This is a schematic diagram of the drive mechanism, clutch control mechanism and transmission mechanism of the present invention;

[0038] Figure 7 This is a schematic diagram of the drive mechanism and clutch control mechanism of the present invention;

[0039] Figure 8 This is a schematic diagram of the transmission mechanism structure of the present invention;

[0040] Figure 9 This is a schematic diagram of the mechanical energy storage mechanism of the present invention;

[0041] Figure 10 This is a schematic diagram of the power generation mechanism of the present invention;

[0042] Figure 11 This is a schematic diagram of the cover mechanism of the present invention.

[0043] Reference numerals: 1. Base mechanism; 101. Base body; 102. Control box; 103. Mounting bracket; 2. Housing mechanism; 201. Housing body; 202. First bearing; 203. Second bearing; 204. Infrared sensor; 205. One-way vacuum valve; 206. Positioning sleeve; 3. Drive mechanism; 301. Reducer; 302. Brake motor; 303. Spring; 304. First toothed half-coupling; 305. Annular groove; 4. Clutch control mechanism; 401. Electric push rod; 402. Telescopic shaft; 403. Hinge frame; 404. Shift fork; 5. 501. Transmission mechanism; 502. Fixed base; 503. Fixed frame; 504. First rotating shaft; 505. First spur gear; 506. Second toothed half-coupling; 6. Mechanical energy storage mechanism; 601. Second rotating shaft; 602. Second spur gear; 603. Swing rod; 604. Counterweight; 7. Generating mechanism; 701. Speed-increasing gearbox; 702. Third rotating shaft; 703. Overrunning clutch gear; 704. Flywheel; 705. Permanent magnet synchronous generator; 8. Cover mechanism; 801. Cover body; 802. Third bearing; 803. Observation window; 804. Positioning stop. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0045] like Figures 1-11 As shown, a photovoltaic grid-connected power fluctuation suppression device includes a base mechanism 1, a housing mechanism 2, and a cover mechanism 8. The base mechanism 1 includes a base body 101, a control box 102 fixed on the base body 101, and a mounting bracket 103 fixed on the base body 101. The control box 102 is equipped with a real-time power sampling sensor and an electric control switch. The base body 101 provides a stable mounting foundation for the control box 102 and the mounting bracket 103. The control box 102 fixed on the base body 101 enables a compact layout of the overall structure. The mounting bracket 103 can be used for the subsequent assembly and fixing of related transmission and power components of the whole machine. At the same time, the real-time power sampling sensor and electric control switch installed inside the control box 102 can collect the operating power parameters of the equipment in real time and cooperate with the electric control switch to realize the automatic control of circuit on / off and working status. Relying on the integrated fixing function of the base body 101, the overall assembly integrity and operational stability of the whole machine can be improved.

[0046] like Figure 1 , Figure 2 and Figure 5As shown, a housing mechanism 2 is fixed on the base mechanism 1. The housing mechanism 2 includes a housing body 201 fixed on the mounting bracket 103. A first bearing 202 and a second bearing 203 are fixed on the housing body 201. An infrared sensor 204 and a one-way vacuum valve 205 are fixed on the inner side of the housing body 201. A positioning sleeve 206 is integrally formed on the inner side of the housing body 201. The housing body 201 is stably mounted and fixed on the mounting bracket 103. The first bearing 202 and the second bearing 203 can provide coaxial support for the internal rotating components and reduce rotational wear. The infrared sensor 204 set on the inner side of the housing body 201 can detect the running position and working status of the internal components in real time. The one-way vacuum valve 205 is a preferred configuration to facilitate the operator to perform vacuuming treatment inside the device according to the actual working conditions. At the same time, it can maintain the stability of the internal air pressure and prevent the external airflow from flowing back. The positioning sleeve 206 integrally formed on the housing body 201 can achieve precise insertion and limiting of the internal components, simplify the assembly process and improve the positioning accuracy and operational stability of the overall structure.

[0047] like Figure 3 , Figure 6 and Figure 7 As shown, a drive mechanism 3 is fixedly mounted on the housing mechanism 2. The drive mechanism 3 includes a reducer 301. A brake motor 302 is fixed to the input end of the reducer 301. A spring 303 is sleeved on the output shaft of the reducer 301. A first toothed half-coupling 304 is slidably connected to the output shaft of the reducer 301. An annular groove 305 is integrally formed on the first toothed half-coupling 304. A shaft key is integrally formed on the output shaft of the brake motor 302. The shaft key enables the first toothed half-coupling 304 to rotate synchronously with the output shaft of the brake motor 302, thereby reducing speed. The speed reducer 301 can adjust the speed and amplify the torque of the power output by the brake motor 302. The brake motor 302 can automatically lock its shaft when the power is cut off to prevent the equipment from accidentally reversing or slipping. The spring 303 set on the output shaft of the speed reducer 301 can play an axial buffer and elastic pushing role. The shaft key integrally formed on the output shaft of the brake motor 302 can realize the circumferential limit transmission between the first toothed half coupling 304 and the output shaft of the brake motor 302, ensuring that the two rotate synchronously without relative slippage, making the power transmission more stable and reliable and the structural assembly more compact and regular.

[0048] like Figure 3 , Figure 6 and Figure 7As shown, a clutch control mechanism 4 is fixed inside the housing mechanism 2. The clutch control mechanism 4 includes an electric push rod 401 and a hinge frame 403. A telescopic shaft 402 is fixed to the output end of the electric push rod 401. A shift fork 404 is rotatably connected to the hinge frame 403. Both the electric push rod 401 and the hinge frame 403 are fixed to the housing body 201. The telescopic shaft 402 is slidably connected to one end of the shift fork 404. The other end of the shift fork 404 is embedded in the annular groove 305 and rotatably connected to the annular groove 305. The fact that both the electric push rod 401 and the hinge frame 403 are fixed to the housing body 201 ensures that the clutch control mechanism 4 is firmly installed and has a neat layout. The electric push rod 401 achieves linear telescopic movement through the telescopic shaft 402 and slides with the shift fork 404. In coordination with the transmission of push and pull power, the shift fork 404 can swing axially along the output shaft of the reducer 301. The other end of the shift fork 404 is embedded in the annular groove 305 and forms a rotational connection with it. It can drive the annular groove 305 to slide axially while rotating relative to it. When the electric push rod 401 retracts, the telescopic shaft 402 drives the end of the shift fork 404 to swing towards the second toothed half-coupling 505, thereby making the first toothed half-coupling 304 and the second toothed half-coupling 505 engage. Conversely, when the electric push rod 401 extends, the shift fork 404 drives the first toothed half-coupling 304 and the second toothed half-coupling 505 to separate, thereby realizing the automatic engagement and disengagement control of the clutch structure. The overall transmission is smooth, the action response is sensitive, and the positioning is stable and reliable.

[0049] like Figure 3 , Figure 6 and Figure 8 As shown, a transmission mechanism 5 is fixed on the housing mechanism 2. The transmission mechanism 5 includes a fixed base 501, on which a fixed frame 502 is integrally welded. A first rotating shaft 503 is rotatably connected to the inner side of the fixed frame 502. A first spur gear 504 is coaxially fixed to one end of the first rotating shaft 503, and a second toothed half-coupling 505 is coaxially fixed to the other end of the first rotating shaft 503. The fixed base 501 is fixed to the housing body 201, and the second toothed half-coupling 505 is coaxially aligned with the first toothed half-coupling 504. The fixed connection between the fixed base 501 and the housing body 201 enables the overall positioning and structural stability of the transmission mechanism 5. 2. The integral welding onto the fixed base 501 can improve its own structural strength and overall rigidity. The inner side of the fixed frame 502 forms a rotational support limit for the first rotating shaft 503, ensuring the coaxiality and rotational stability of the first rotating shaft 503 during operation. The first rotating shaft 503 is coaxially fixed to the first spur gear 504 and the second toothed half-coupling 505 at both ends, which can realize the synchronous transmission of torque. The second toothed half-coupling 505 and the first toothed half-coupling 304 are kept coaxially aligned, which can ensure that the two are precisely meshed and connected in the future, so that the power can be smoothly and reliably transmitted from the drive end to the transmission end, effectively reducing transmission offset and meshing jamming, and improving the transmission accuracy and operation stability of the whole machine.

[0050] like Figure 3 and Figure 9 As shown, a mechanical energy storage mechanism 6 is rotatably connected to the inner side of the housing mechanism 2. The mechanical energy storage mechanism 6 includes a second rotating shaft 601, a second spur gear 602 coaxially fixed on the second rotating shaft 601, a pendulum 603 fixed on the second rotating shaft 601, and a counterweight 604 fixed to the end of the pendulum 603. The second rotating shaft 601 is fixed to the inner ring of the first bearing 202, and the second spur gear 602 meshes with the first spur gear 504. The second rotating shaft 601 and the inner ring of the first bearing 202 are mutually fixed, which can provide reliable rotational support for the second rotating shaft 601 and ensure its smooth rotation process. The second spur gear 602 is coaxially fixed on the second rotating shaft 601 and forms a meshing transmission with the first spur gear 504. The pendulum 603 and the counterweight 604 together form an integrated pendulum structure, which can store and release mechanical potential energy by relying on gravity and rotational inertia. When the photovoltaic grid power When the power output increases, the brake motor 302 starts operating, sequentially connecting with the first jaw coupling 304 and the second jaw coupling 505. The first spur gear 504 then drives the second spur gear 602 to rotate, which in turn drives the second shaft 601 to rotate and causes the swing arm 603 to rotate upwards, thereby raising the counterweight 604 to store gravitational potential energy. When the photovoltaic grid power decreases, the clutch control mechanism 4 promptly activates, causing the first jaw coupling 304 and the second jaw coupling 505 to separate, releasing the rigid connection of the power transmission link. The brake motor 302 no longer locks the entire transmission system. At this time, the swing arm 603 and the counterweight 604 will naturally swing downwards under their own weight, driving the second spur gear 602 to rotate in the opposite direction, converting the previously stored gravitational potential energy into mechanical kinetic energy and outputting it in the reverse direction to the power generation mechanism 7.

[0051] like Figure 3 and Figure 10As shown, a power generation mechanism 7 is fixed on the housing mechanism 2. The power generation mechanism 7 includes a speed-increasing gearbox 701. A third rotating shaft 702 is fixed to the input end of the speed-increasing gearbox 701. An overrunning clutch gear 703 and a flywheel 704 are coaxially fixed on the third rotating shaft 702. A permanent magnet synchronous generator 705 is fixed to the output end of the speed-increasing gearbox 701. The speed-increasing gearbox 701 is fixed to the housing body 201. The overrunning clutch gear 703 is an external gear type overrunning clutch gear 703, which meshes with a second spur gear 602. The speed-increasing gearbox 701 is fixedly installed on the housing body 201 to achieve overall positioning and structural stability of the power generation mechanism 7. The third rotating shaft 702 is connected to the speed-increasing gearbox 701. The input end of the gearbox 701 can stably transmit input power. The external gear type overrunning clutch 703 and flywheel 704, which are coaxially arranged on the third rotating shaft 702, can rotate synchronously with the rotating shaft. The overrunning clutch 703 meshes with the second spur gear 602, which can smoothly receive the rotational power released by the mechanical energy storage mechanism 6 and realize unidirectional transmission, avoiding the reverse drag of power and causing damage to components. The flywheel 704 can use its own rotational inertia to smooth the speed fluctuation and maintain the smooth operation of the transmission process. The speed-increasing gearbox 701 can speed up the input speed and increase the output torque, and then transmit the power to the permanent magnet synchronous generator 705, which completes the conversion of mechanical energy into electrical energy.

[0052] like Figure 1 , Figure 2 and Figure 11As shown, a cover mechanism 8 is fixed on the housing mechanism 2. The cover mechanism 8 includes a cover body 801 that is sealed and connected to the housing body 201. A third bearing 802 is fixed on the inner side of the cover body 801. The end of the second rotating shaft 601 is fixed to the inner ring of the third bearing 802. An observation window 803 is embedded and fixed on the cover body 801. A positioning stop 804 is fixed on the inner side of the cover body 801. The end of the positioning stop 804 is inserted into the positioning sleeve 206. The cover body 801 and the housing body 201 form a sealed connection, which can form a closed protection for the inner cavity of the housing, effectively preventing external dust and moisture from entering the cavity and ensuring the working environment of the internal transmission and sensing components. The third bearing 802 installed on the inner side of the cover body 801 and the first bearing 202 form a front and rear double support structure. The end of the second rotating shaft 601 is fixedly engaged with the inner ring of the third bearing 802, which can further improve the coaxiality of the assembly of the second rotating shaft 601. The design enhances the stability of the rotational support, reducing radial runout and wear during high-speed rotation of the shaft. Simultaneously, the overall sealing structure maintains a sealed internal cavity, meeting the requirements for vacuum protection and long-term stable operation of the equipment. A fixed observation window 803 embedded in the cover body 801 allows staff to directly observe the swing condition of the swing rod 603 and counterweight 604 inside the housing body 201, as well as the meshing status of each gear. Internal condition inspection can be completed without disassembling the equipment. The positioning stop 804, located inside the cover body 801, engages with the positioning sleeve 206, enabling precise alignment and limiting of the cover body 801 and housing body 201 during assembly. This improves overall assembly accuracy and structural connection strength. Furthermore, the positioning stop 804 physically limits the maximum swing stroke of the swing rod 603, preventing excessive swing angles and collisions, ensuring stable internal mechanism movement and safe, reliable operation.

[0053] The working principle of this embodiment is as follows: When the equipment is working, the real-time power sampling sensor inside the control box 102 monitors the real-time power of the photovoltaic grid connection. Multiple units of this device can be deployed in the photovoltaic grid to form an array for collaborative work. When the photovoltaic grid power is detected to be too high and there is excess power, the electric control switch triggers the brake motor 302 to start. After the reducer 301 reduces the speed and increases the torque, it drives the first toothed half coupling 304 to operate synchronously. The electric push rod 401 drives the fork 404 to swing through the telescopic shaft 402, pushing the first toothed half coupling 304 to slide axially and engage with the second toothed half coupling 505. The power is transmitted to the second spur gear 602 through the first rotating shaft 503 and the first spur gear 504, which drives the second rotating shaft 601 to drive the swing rod 603 and the counterweight 604 to lift and rotate upward to store gravitational potential energy. The infrared sensor 204 inside the housing body 201 The system monitors the lifting height of the swing arm 603 in real time. When the swing arm 603 reaches the preset limit height, the system stops storing energy for the current device and automatically switches to the next device in the array to perform energy storage operations in sequence. When the power of the photovoltaic grid decreases and a power supply gap occurs, the electric push rod 401 reverses its action to separate the first jaw coupling 304 from the second jaw coupling 505, releasing the locking constraint of the brake motor 302. The swing arm 603 and the counterweight 604 swing downward under the action of gravity. Before it completely falls back to the low position, it can continue to swing back and forth by inertia, continuously driving the second flat gear 602 to rotate. The power is transmitted unidirectionally to the speed-increasing gearbox 701 through the external gear overrunning clutch gear 703. After speeding up, it drives the permanent magnet synchronous generator 705 to continuously connect to the grid to supplement energy. The multi-device array takes turns storing energy and releasing energy synchronously, realizing the full-domain stable suppression of photovoltaic grid-connected power fluctuations.

[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A photovoltaic grid-connected power fluctuation suppression device, comprising a base mechanism (1), a housing mechanism (2), and a cover mechanism (8), characterized in that: The base mechanism (1) includes a base body (101), a control box (102) is fixed on the base body (101), a housing mechanism (2) is fixed on the base mechanism (1), a drive mechanism (3) is fixedly installed on the housing mechanism (2), the drive mechanism (3) includes a reducer (301), a brake motor (302) is fixed at the input end of the reducer (301), a spring (303) is sleeved on the output shaft of the reducer (301), a first toothed half coupling (304) is slidably connected on the output shaft of the reducer (301), an annular groove (305) is integrally formed on the first toothed half coupling (304), a clutch control mechanism (4) is fixed inside the housing mechanism (2), the clutch control mechanism (4) includes an electric push rod (401) and a hinge frame (403), a telescopic shaft (402) is fixed at the output end of the electric push rod (401), and a shift fork (404) is rotatably connected on the hinge frame (403); A transmission mechanism (5) is fixed on the housing mechanism (2). The transmission mechanism (5) includes a fixed seat (501). A fixed frame (502) is integrally welded on the fixed seat (501). A first rotating shaft (503) is rotatably connected to the inner side of the fixed frame (502). A first spur gear (504) is coaxially fixed at one end of the first rotating shaft (503). A second toothed half-coupling (505) is coaxially fixed at the other end of the first rotating shaft (503). A mechanical energy storage mechanism (6) is rotatably connected to the inner side of the housing mechanism (2). The mechanical energy storage mechanism (6) includes a second rotating shaft (601). A second flat gear (602) is coaxially fixed on the second rotating shaft (601). A rocker arm (603) is also fixed on the second rotating shaft (601). A counterweight (604) is fixed at the end of the rocker arm (603). A power generation mechanism (7) is fixed on the housing mechanism (2). The power generation mechanism (7) includes a speed-increasing gearbox (701). A third rotating shaft (702) is fixed at the input end of the speed-increasing gearbox (701). An overrunning clutch gear (703) and a flywheel (704) are coaxially fixed on the third rotating shaft (702). A permanent magnet synchronous generator (705) is fixed at the output end of the speed-increasing gearbox (701). A cover mechanism (8) is fixed on the housing mechanism (2).

2. The photovoltaic grid-connected power fluctuation suppression device according to claim 1, characterized in that, A mounting bracket (103) is fixed on the base body (101), and a real-time power sampling sensor and an electronic control switch are installed inside the control box (102).

3. The photovoltaic grid-connected power fluctuation suppression device according to claim 2, characterized in that, The housing mechanism (2) includes a housing body (201) fixed on a mounting bracket (103). A first bearing (202) and a second bearing (203) are fixed on the housing body (201). An infrared sensor (204) and a one-way vacuum valve (205) are fixed on the inner side of the housing body (201). A positioning sleeve (206) is integrally formed on the inner side of the housing body (201).

4. The photovoltaic grid-connected power fluctuation suppression device according to claim 1, characterized in that, The output shaft of the brake motor (302) is integrally formed with a key, which enables the first toothed half coupling (304) to rotate synchronously with the output shaft of the brake motor (302).

5. A photovoltaic grid-connected power fluctuation suppression device according to claim 3, characterized in that, The electric push rod (401) and the hinge frame (403) are both fixed to the housing body (201). The telescopic shaft (402) is slidably connected to one end of the shift fork (404). The other end of the shift fork (404) is embedded in the annular groove (305) and is rotatably connected to the annular groove (305).

6. A photovoltaic grid-connected power fluctuation suppression device according to claim 3, characterized in that, The fixed seat (501) is fixed to the housing body (201), and the second toothed half coupling (505) is coaxially aligned with the first toothed half coupling (304).

7. A photovoltaic grid-connected power fluctuation suppression device according to claim 1, characterized in that, The second rotating shaft (601) is fixed to the inner ring of the first bearing (202), and the second spur gear (602) is meshed with the first spur gear (504).

8. A photovoltaic grid-connected power fluctuation suppression device according to claim 3, characterized in that, The speed-increasing gearbox (701) is fixed to the housing body (201), and the overrunning clutch gear (703) is an external gear type overrunning clutch gear (703), which meshes with the second flat gear (602).

9. A photovoltaic grid-connected power fluctuation suppression device according to claim 3, characterized in that, The cover mechanism (8) includes a cover body (801) that is sealed to the housing body (201). A third bearing (802) is fixed on the inner side of the cover body (801), and the end of the second rotating shaft (601) is fixed to the inner ring of the third bearing (802).

10. A photovoltaic grid-connected power fluctuation suppression device according to claim 9, characterized in that, An observation window (803) is inlaid and fixed on the cover body (801), and a positioning stop (804) is fixed on the inner side of the cover body (801). The end of the positioning stop (804) is inserted into the positioning sleeve (206).

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