A typhoon-resistant offshore photovoltaic support system and control method

Abstract

The application relates to an anti-typhoon offshore photovoltaic support system and a control method, which adopts a coupling control strategy of meteorological early warning feedforward combined with field measurement, wakes up the electric control components in the system to enter a standby state in advance when receiving meteorological early warning (high wind or typhoon), thereby eliminating the delay, and uses the wind speed measured on site and the vibration acceleration of the support body as the execution judgment to avoid the deviation problem of meteorological forecast and actual site wind field, thereby improving the reliability of the system. In addition, the application adopts cooperation of hydraulic driving, damping vibration reduction and mechanical rigid locking, and the state of the support body is no longer dependent on hydraulic driving, and the safety is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of offshore photovoltaic power generation technology, specifically to a typhoon-resistant offshore photovoltaic support system and control method. Background Technology

[0002] Coastal projects such as solar-fishery integration commonly use PHC (propaganda-converter) pile-based fixed-mount floating photovoltaic (PV) supports. These supports are mostly permanently fixed in tilt, making them passive wind-resistant structures. However, the coastal areas of Fujian and Guangdong experience frequent typhoons annually. Fixed-tilt PV modules have a large windward area and significant wind suction, making them prone to problems such as microcracks in the modules, loose bolts, and localized collapses.

[0003] Although adjustable photovoltaic (PV) supports have emerged, most existing adjustable PV supports rely on weather forecasts for control. However, the distance between weather stations and PV sites in fishponds means that local sea and land breezes and the microclimate of the pond area can cause significant discrepancies between forecasts and actual wind conditions, resulting in insufficient reliability. Furthermore, most existing adjustable PV support solutions rely solely on hydraulic locking, which, under moderate to strong wind conditions, leads to continuous wind vibration and poses a risk of hydraulic leakage and instability. Summary of the Invention

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide a typhoon-resistant offshore photovoltaic support system and control method, which has good typhoon resistance reliability and high safety.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A typhoon-resistant offshore photovoltaic support system includes at least one photovoltaic subsystem and at least one edge controller, with each edge controller corresponding to at least one photovoltaic subsystem. The photovoltaic subsystem includes a pile foundation, an adjustable photovoltaic support structure, photovoltaic modules, a hydraulic drive unit, a damping unit, a mechanical locking unit, and a sensing and acquisition unit. The adjustable photovoltaic support includes a support body, a column, and a diagonal brace. The column is installed on top of the pile foundation, and the top of the column is hinged to the center of the support body. A limiting member is provided on the top of the column or the pile foundation. The lower end of the diagonal brace is slidably connected to the limiting member, and the limiting member restricts the movement range of the lower end of the diagonal brace. The upper end of the diagonal brace is connected to the back of the support body. The photovoltaic modules are installed on the front of the support body. The support body has two states: a working state and a defensive state. The tilt angle of the support body in the working state is greater than the tilt angle in the defensive state. The hydraulic drive unit is used to drive the support body to switch between working state and typhoon-resistant posture. One end of the hydraulic drive unit is hinged to the vertical column, and the other end is hinged to the diagonal brace or the support body. The damping unit is used to suppress vibration. One end of the damping unit is hinged to a vertical column, and the other end is hinged to a diagonal brace or support body. The mechanical locking unit is used to lock the state of the support body; The sensing and acquisition unit is used to collect wind speed, wind direction, and vibration information of the adjustable photovoltaic support. The edge controller is connected to a corresponding hydraulic drive unit, mechanical locking unit, sensing and acquisition unit, and an external terminal. The external terminal is used to send weather forecasts to the edge controller.

[0006] The limiting member is provided with an arc-shaped limiting hole, and the lower end of the inclined support frame is provided with a sliding shaft. The sliding shaft is slidably connected in the arc-shaped limiting hole, and the sliding shaft can rotate in the arc-shaped limiting hole. When the sliding shaft abuts against the wall of one end of the arc-shaped limiting hole, the main body of the support is in the working state, and when the sliding shaft abuts against the wall of the other end of the arc-shaped limiting hole, the main body of the support is in the defensive state.

[0007] The tilt angle of the main body of the support is 13±0.5° in the working state and 0-5° in the defensive state.

[0008] The hydraulic drive unit is an electric bidirectional hydraulic push rod; the damping unit is a hydraulic damper.

[0009] The hydraulic damper is a passive hydraulic damper; or, the hydraulic damper is an electrically controlled hydraulic damper, and the electrically controlled hydraulic damper is connected to an edge controller.

[0010] The mechanical locking unit is installed at the upper end of the column and includes a driving component and a pin. The driving component drives the pin to move telescopically. The column is provided with a third pin hole that guides the pin. The bracket body is provided with a first pin hole and a second pin hole. When the bracket body is in the working state, the first pin hole is directly opposite the pin, and the pin can be inserted into the first pin hole and the third pin hole. When the bracket body is in the defensive state, the second pin hole is directly opposite the pin, and the pin can be inserted into the second pin hole and the third pin hole.

[0011] The sensing and acquisition unit includes a wind speed and direction sensor, a vibration acceleration sensor, and an angle sensor or limit switch for detecting the tilt angle of the support body. The wind speed and direction sensor is installed outside the edge controller or on the support body; the vibration acceleration sensor is installed on the support body; the external terminal is a weather radio station and / or a control center host device.

[0012] This invention also discloses a control method for the above-mentioned typhoon-resistant offshore photovoltaic support system, which includes the following steps: S1. The edge controller receives weather forecasts from external terminals in real time. When a typhoon warning or gale warning is issued, step S2 is executed; otherwise, the status quo is maintained. S2. The system enters standby mode. The edge controller wakes up the hydraulic drive unit and the mechanical locking unit, and judges the wind speed and the vibration acceleration of the support body in real time. If the wind speed exceeds the first preset wind speed and / or the vibration acceleration of the support body exceeds the first preset vibration velocity, step S3 is executed. If the wind speed is lower than the second preset wind speed and the vibration acceleration of the support body is lower than the second preset vibration velocity, step S5 is executed. Otherwise, the original state is maintained. S3. Stop power generation; control the mechanical locking unit to unlock and control the hydraulic drive unit to switch the support body from working state to defensive state, and then control the mechanical locking unit to lock again; after the support body switches to the defensive state, the system detects and judges in real time whether the wind speed is lower than the third preset wind speed and whether the vibration acceleration of the support body is lower than the third preset vibration speed. If yes, execute step S4; otherwise, maintain the original state. S4. Control the mechanical locking unit to unlock and control the hydraulic drive unit to switch the support body from the defensive state to the working state. Then control the mechanical locking unit to lock again; restore power generation and return to step S2. S5. The edge controller confirms whether the typhoon warning or gale warning has been lifted. If yes, it executes step S1; otherwise, it executes step S2. Among them, the first preset wind speed > the third preset wind speed ≥ the second preset wind speed, and the first preset vibration speed > the third preset vibration speed ≥ the second preset vibration speed.

[0013] In step S2, if the wind speed exceeds the first preset wind speed and / or the vibration acceleration of the support body exceeds the first preset vibration velocity, and the duration reaches the first set time, step S3 is executed; if the wind speed is lower than the second preset wind speed and the vibration acceleration of the support body is lower than the second preset vibration velocity, and the duration reaches the second set time, step S5 is executed. In step S3, if the wind speed is lower than the third preset wind speed and the vibration acceleration of the main body of the support is lower than the third preset vibration velocity, and the duration reaches the third set time, then step S4 is executed; otherwise, the original state is maintained.

[0014] The hydraulic drive unit is an electro-hydraulic damper; in step S1, when maintaining the original state, the electro-hydraulic damper is configured to a low-damping state and maintains this state; in steps S2 to S4, the edge controller adjusts the damping state of the electro-hydraulic damper in real time according to the vibration acceleration of the support body.

[0015] By adopting the above scheme, this invention employs a coupled control strategy combining meteorological early warning feedforward with on-site measurements. Upon receiving a meteorological warning (strong winds or typhoons), the electronic control components in the system are activated in advance to enter standby mode, thereby eliminating delays. Simultaneously, the on-site measured wind speed and vibration acceleration of the support structure are used as the execution decision, avoiding the problem of deviation between meteorological forecasts and actual site wind fields, thus improving system reliability. Furthermore, this invention utilizes a combination of hydraulic drive, damping vibration reduction, and mechanical rigid locking, ensuring that the stability of the support structure no longer relies solely on hydraulic drive, significantly improving safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the system of the present invention; Figure 2 This is a schematic diagram of the photovoltaic subsystem of the present invention; Figure 3 This is a schematic diagram (operating state) of the photovoltaic subsystem of the present invention. Figure 4 This is a schematic diagram of the photovoltaic subsystem of the present invention (defense mode). Figure 5 This is a schematic diagram of the connection between the diagonal brace and the limiting component of the present invention (working state). Figure 6 for Figure 5 A sectional view along line A in the middle; Figure 7 This is a schematic diagram of the connection of the upright plate of the present invention (defense state).

[0017] Explanation of key figure labels: 1. Pile foundation; 2. Support body; 3. Column; 4. Diagonal brace; 5. Limiting component; 6. Arc-shaped limiting hole; 7. Sliding shaft; 8. Hydraulic drive unit; 9. Drive component; 10. Pin; 11. Vertical plate; 12. First pin hole; 13. Second pin hole; 14. Damping unit. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0019] like Figures 1 to 7 As shown, this invention discloses a typhoon-resistant offshore photovoltaic support system, which includes at least one photovoltaic subsystem and at least one edge controller. Each edge controller corresponds to at least one photovoltaic subsystem, and the specific configuration relationship is determined according to the site layout. The edge controller is preferably a PLC.

[0020] The photovoltaic subsystem includes pile foundation 1, adjustable photovoltaic support structure, photovoltaic modules, hydraulic drive unit 8, damping unit 14, mechanical locking unit, and sensing and acquisition unit. Pile foundation 1 is a PHC400 AB type precast concrete pipe pile.

[0021] The adjustable photovoltaic (PV) support system includes a support body 2, columns 3, and diagonal bracing 4. The lower end of the column 3 is connected to the anti-corrosion support at the top of the pile foundation 1 via a flange, and the top of the column 3 is hinged to the center of the back (sea-facing side) of the support body 2. The PV modules are installed on the front (sky-facing side) of the support body 2. The support body 2 generally adopts a frame structure. The structure of the support body 2, the structure of the PV modules, and how the PV modules are installed with the support body 2 are not the focus of this case and will not be elaborated further.

[0022] like Figures 3 to 4 As shown, in this case, the support body 2 has two states: a working state and a defensive state. The tilt angle of the support body 2 in the working state is greater than that in the defensive state. More specifically, the tilt angle of the support body 2 in the working state is 13±0.5°. The tilt angle of the support body 2 in the defensive state is 0-5°, which is designed to reduce wind resistance.

[0023] like Figure 5 As shown, the upper end of the diagonal brace 4 is mainly connected to the edge of the back of the support body 2 (pre-welded or bolted on site). If necessary, it can also be connected to the back of the support body 2 near the center, as long as it does not interfere with the column 3. The diagonal brace 4 can enhance the structural strength of the support body 2. The lower end of the diagonal brace 4 is connected to the column 3 or the pile foundation 1. Specifically, a limiting member 5 is provided at the top of the column 3 or the pile foundation 1, preferably on the column 3, to reduce the possibility of water contact. The limiting member 5 has an arc-shaped limiting hole 6. A cylindrical sliding shaft 7 is fixedly provided at the lower end of the diagonal brace 4. The sliding shaft 7 is slidably connected in the arc-shaped limiting hole 6, and the sliding shaft 7 can rotate in the arc-shaped limiting hole 6.

[0024] like Figure 6 As shown, in this embodiment, in order to better define the state of the support body 2 and facilitate the mechanical locking of the support body 2, it is required that when the sliding shaft 7 abuts against one end of the arc-shaped limiting hole 6, the support body 2 is in the working state, and when the sliding shaft 7 abuts against the other end of the arc-shaped limiting hole 6, the support body 2 is in the defensive state.

[0025] In this embodiment, the locking and switching of the state of the support body 2 is achieved through the cooperation of the hydraulic drive unit 8 and the mechanical locking unit. Specifically, the hydraulic drive unit 8 is an electric bidirectional hydraulic push rod, one end of which is hinged to the vertical column 3, and the other end is hinged to the diagonal brace 4 or the support body 2.

[0026] like Figure 7As shown, the mechanical locking unit is installed at the top of the column 3 to minimize water contact. The mechanical locking unit includes a drive component 9 and a pin 10 (which needs to have sufficient strength). The drive component 9 (e.g., an electric cylinder) drives the pin 10 to extend and retract. The drive component 9 is connected to an edge controller. A vertical plate 11 (which needs to have a certain thickness to ensure strength) is fixed to the back of the bracket body 2. The vertical plate 11 has a first pin hole 12 and a second pin hole 13. On the side of the vertical plate 11 closest to the pin 10, the openings of the first pin hole 12 and the second pin hole 13 are flared to facilitate the insertion of the pin 10. A limiting platform for installing the mechanical locking unit is fixedly installed at the top of the column 3. The limiting platform has a third pin hole. The pin 10 is guided and engaged with the third pin hole. When the drive component 9 drives the pin 10 to extend outward, one end of the pin connected to the drive component 9 remains in the third pin hole, while the other end can extend into the first pin hole 12 or the second pin hole 13.

[0027] When the support body 2 is in the working state, the first pin hole 12 is aligned with the latch 10 (or the third pin hole), and when the drive member 9 extends, the latch 10 can be inserted into the first pin hole 12, thereby achieving mechanical locking. When the support body 2 is in the defensive state, the second pin hole 13 is aligned with the latch 10 (or the third pin hole), and when the drive member 9 extends, the latch 10 can be inserted into the second pin hole 13, thereby achieving mechanical locking. Through this latch 10 connection method, the locking of the support body 2 in both the working and defensive states is no longer solely dependent on the hydraulic drive unit 8, resulting in a lower risk of hydraulic leakage and a significant improvement in safety.

[0028] The damping unit 14 is used to suppress vibration, thereby reducing component fatigue damage. The damping unit 14 is a hydraulic damper, with one end hinged to the vertical column 3 and the other end hinged to the diagonal brace 4 or the support body 2. The damping unit 14 and the hydraulic drive unit 8 can be connected in parallel for ease of assembly. A passive hydraulic damper or an electro-hydraulic damper can be used, with the latter being preferred, allowing for adjustment of the damping state. The electro-hydraulic damper requires connection to an edge controller for adjustment.

[0029] The sensing and acquisition unit is used to collect wind speed, wind direction, vibration information (vibration acceleration) of the adjustable photovoltaic support, and the tilt angle of the photovoltaic support. Specifically, the sensing and acquisition unit includes a wind speed and direction sensor, a vibration acceleration sensor, and an angle sensor (or a limit switch, which only detects the tilt angle in the above two states). The wind speed and direction sensor is installed outside the edge controller or on the support body 2, and the vibration acceleration sensor is installed on the support body 2. The wind speed and direction sensor, vibration acceleration sensor, and angle sensor (or limit switch) are all connected to the edge controller. In addition, the sensing and acquisition unit may also include a water level sensor, which can detect the water level and cut off the power in time when the water level is too high.

[0030] In addition, the edge controller also communicates with external terminals, which are used to send weather forecasts to the edge controller. These external terminals are weather radio stations and / or control center host devices.

[0031] The control method for the typhoon-resistant offshore photovoltaic support system mentioned above includes the following steps: S1. The edge controller receives weather forecasts from external terminals in real time. When a typhoon warning or gale warning is issued, step S2 is executed; otherwise, the system remains unchanged. At this time, the system is in normal working condition and the electro-hydraulic damper is kept in a low-damping state.

[0032] S2. The system enters the standby mode. The edge controller wakes up the hydraulic drive unit 8 and the mechanical locking unit to enter the standby state. At the same time, the edge controller adjusts the damping state of the electro-hydraulic damper in real time according to the vibration acceleration of the support body 2 to achieve an adaptive effect. In the abnormal working state, the electro-hydraulic damper adaptively adjusts to suppress wind vibration.

[0033] Meanwhile, the edge controller also judges the wind speed and the vibration acceleration of the support body 2 in real time: if the wind speed exceeds the first preset wind speed and lasts for a first set time, and the vibration acceleration of the support body 2 exceeds the first preset vibration velocity and lasts for a first set time, then step S3 is executed; if the wind speed is lower than the second preset wind speed and the vibration acceleration of the support body 2 is lower than the second preset vibration velocity, and this situation lasts for a second set time, then step S5 is executed; otherwise, the original state is maintained. In the standby mode, the support body 2 temporarily remains in working condition. By setting the first set time and the second set time, the reliability of the control and the safety of the system are ensured.

[0034] S3. Immediately stop power generation (achieved by controlling the photovoltaic inverter; this is a mature existing technology and will not be elaborated further). Then, control the mechanical locking unit to unlock, the pin 10 disengages from the first pin hole 12, and then control the hydraulic drive unit 8 to move (retract), causing the support body 2 to switch from the working state to the defensive state. Afterwards, control the mechanical locking unit to lock again, that is, the pin 10 is inserted into the second pin hole 13. After the support body 2 switches to the defensive state, the system monitors in real time whether the wind speed is lower than the third preset wind speed, whether the vibration acceleration of the support body 2 is lower than the third preset vibration velocity, and whether the duration reaches the third set time. If all three are true, step S4 is executed; otherwise, the original state is maintained, and the system remains in the windproof state.

[0035] S4. The mechanical locking unit is unlocked, i.e., the pin 10 disengages from the second pin hole 13. Then, the hydraulic drive unit 8 is activated (extended), causing the support body 2 to switch from the defensive state to the working state. Next, the mechanical locking unit is locked again, i.e., the pin 10 is inserted into the first pin hole 12. Afterward, the system resumes power generation and returns to step S2.

[0036] S5. The edge controller confirms whether the typhoon warning or gale warning has been lifted. If yes, it executes step S1; otherwise, it executes step S2.

[0037] In the above steps, the first preset wind speed > the third preset wind speed ≥ the second preset wind speed, and the first preset vibration velocity > the third preset vibration velocity ≥ the second preset vibration velocity. The specific design values ​​are adjusted according to the actual situation.

[0038] The key to this invention lies in its coupled control strategy, which combines meteorological early warning feedforward with on-site measurements. Upon receiving a meteorological warning (strong winds or typhoons), the system's electronic control components are pre-activated to standby mode, eliminating delays. Simultaneously, the measured wind speed and vibration acceleration of the support body 2 are used as the execution criteria, avoiding discrepancies between weather forecasts and actual site wind fields, thus improving system reliability. Furthermore, this invention employs a combination of hydraulic drive, damping vibration reduction, and mechanical rigid locking. The stability of the support body 2 no longer relies solely on hydraulic drive, significantly enhancing safety. Moreover, the support body 2 rotates only within a small angle range (0-13°), resulting in a short stroke and low driving load, reducing the configuration cost of the hydraulic drive unit 8. The shorter stroke of the hydraulic drive unit 8 further improves stability. When the support body 2 is leveled, the windward load is significantly reduced. The support body 2 is connected to the column 3 at its center, and its perimeter is connected to limiting components 5 via diagonal braces 4. This strengthens the support body 2's resistance to lift, effectively resisting damage caused by coastal strong winds or typhoons.

[0039] The above description is merely an embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A typhoon-resistant offshore photovoltaic support system, characterized in that: It includes at least one photovoltaic subsystem and at least one edge controller, with each edge controller corresponding to at least one photovoltaic subsystem; The photovoltaic subsystem includes a pile foundation, an adjustable photovoltaic support structure, photovoltaic modules, a hydraulic drive unit, a damping unit, a mechanical locking unit, and a sensing and acquisition unit. The adjustable photovoltaic support includes a support body, a column, and a diagonal brace. The column is installed on top of the pile foundation, and the top of the column is hinged to the center of the support body. A limiting member is provided on the top of the column or the pile foundation. The lower end of the diagonal brace is slidably connected to the limiting member, and the limiting member restricts the movement range of the lower end of the diagonal brace. The upper end of the diagonal brace is connected to the back of the support body. The photovoltaic modules are installed on the front of the support body. The support body has two states: a working state and a defensive state. The tilt angle of the support body in the working state is greater than the tilt angle in the defensive state. The hydraulic drive unit is used to drive the support body to switch between working state and typhoon-resistant posture. One end of the hydraulic drive unit is hinged to the vertical column, and the other end is hinged to the diagonal brace or the support body. The damping unit is used to suppress vibration. One end of the damping unit is hinged to a vertical column, and the other end is hinged to a diagonal brace or support body. The mechanical locking unit is used to lock the state of the support body; The sensing and acquisition unit is used to collect wind speed, wind direction, and vibration information of the adjustable photovoltaic support. The edge controller is connected to a corresponding hydraulic drive unit, mechanical locking unit, sensing and acquisition unit, and an external terminal. The external terminal is used to send weather forecasts to the edge controller.

2. The typhoon-resistant offshore photovoltaic support system according to claim 1, characterized in that: The limiting member is provided with an arc-shaped limiting hole, and the lower end of the inclined support frame is provided with a sliding shaft. The sliding shaft is slidably connected in the arc-shaped limiting hole, and the sliding shaft can rotate in the arc-shaped limiting hole. When the sliding shaft abuts against the wall of one end of the arc-shaped limiting hole, the main body of the support is in the working state, and when the sliding shaft abuts against the wall of the other end of the arc-shaped limiting hole, the main body of the support is in the defensive state.

3. A typhoon-resistant offshore photovoltaic support system according to claim 1 or 2, characterized in that: The tilt angle of the main body of the support is 13±0.5° in the working state and 0-5° in the defensive state.

4. The typhoon-resistant offshore photovoltaic support system according to claim 1, characterized in that: The hydraulic drive unit is an electric bidirectional hydraulic push rod; the damping unit is a hydraulic damper.

5. A typhoon-resistant offshore photovoltaic support system according to claim 4, characterized in that: The hydraulic damper is a passive hydraulic damper; or, the hydraulic damper is an electrically controlled hydraulic damper, and the electrically controlled hydraulic damper is connected to an edge controller.

6. A typhoon-resistant offshore photovoltaic support system according to claim 1, characterized in that: The mechanical locking unit is installed at the upper end of the column and includes a driving component and a pin. The driving component drives the pin to move telescopically. The column is provided with a third pin hole that guides the pin. The bracket body is provided with a first pin hole and a second pin hole. When the bracket body is in the working state, the first pin hole is directly opposite the pin, and the pin can be inserted into the first pin hole and the third pin hole. When the bracket body is in the defensive state, the second pin hole is directly opposite the pin, and the pin can be inserted into the second pin hole and the third pin hole.

7. A typhoon-resistant offshore photovoltaic support system according to claim 1, characterized in that: The sensing and acquisition unit includes a wind speed and direction sensor, a vibration acceleration sensor, and an angle sensor or limit switch for detecting the tilt angle of the support body. The wind speed and direction sensor is installed outside the edge controller or on the support body; the vibration acceleration sensor is installed on the support body; the external terminal is a weather radio station and / or a control center host device.

8. The control method for the typhoon-resistant offshore photovoltaic support system according to any one of claims 1-7, characterized in that: Includes the following steps: S1. The edge controller receives weather forecasts from external terminals in real time. When a typhoon warning or gale warning is issued, step S2 is executed; otherwise, the status quo is maintained. S2. The system enters the standby mode. The edge controller wakes up the hydraulic drive unit and the mechanical locking unit, and judges the wind speed and vibration acceleration of the support body in real time. If the wind speed exceeds the first preset wind speed and / or the vibration acceleration of the support body exceeds the first preset vibration velocity, proceed to step S3; if the wind speed is lower than the second preset wind speed and the vibration acceleration of the support body is lower than the second preset vibration velocity, proceed to step S5; otherwise, maintain the original state. S3. Stop power generation; control the mechanical locking unit to unlock and control the hydraulic drive unit to switch the support body from working state to defensive state, and then control the mechanical locking unit to lock again; after the support body switches to the defensive state, the system detects and judges in real time whether the wind speed is lower than the third preset wind speed and whether the vibration acceleration of the support body is lower than the third preset vibration speed. If yes, execute step S4; otherwise, maintain the original state. S4. Control the mechanical locking unit to unlock and control the hydraulic drive unit to switch the support body from the defensive state to the working state. Then control the mechanical locking unit to lock again; restore power generation and return to step S2. S5. The edge controller confirms whether the typhoon warning or gale warning has been lifted. If yes, it executes step S1; otherwise, it executes step S2. Among them, the first preset wind speed > the third preset wind speed ≥ the second preset wind speed, and the first preset vibration speed > the third preset vibration speed ≥ the second preset vibration speed.

9. The control method for a typhoon-resistant offshore photovoltaic support system according to claim 8, characterized in that: In step S2, if the wind speed exceeds the first preset wind speed and / or the vibration acceleration of the support body exceeds the first preset vibration velocity, and the duration reaches the first set time, step S3 is executed; if the wind speed is lower than the second preset wind speed and the vibration acceleration of the support body is lower than the second preset vibration velocity, and the duration reaches the second set time, step S5 is executed. In step S3, if the wind speed is lower than the third preset wind speed and the vibration acceleration of the main body of the support is lower than the third preset vibration velocity, and the duration reaches the third set time, then step S4 is executed; otherwise, the original state is maintained.

10. The control method for a typhoon-resistant offshore photovoltaic support system according to claim 8, characterized in that: The hydraulic drive unit is an electro-hydraulic damper; in step S1, when maintaining the original state, the electro-hydraulic damper is configured to a low-damping state and maintains this state; in steps S2 to S4, the edge controller adjusts the damping state of the electro-hydraulic damper in real time according to the vibration acceleration of the support body.

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