Mooring column rotating speed regulation and control system in double-nose offshore wind turbine in-place mooring wind facing process

Abstract

The invention discloses a mooring column rotating speed regulation and control system in the in-place mooring wind facing process of a double-machine-head offshore wind turbine. Belongs to the technical field of offshore wind power generation, and mainly comprises a mooring column, a platform column, a connecting truss, a fan tower drum, a wind generating set, a mooring cable and the like, and the main part of the mooring column comprises a mooring floating body column, a fan connecting column, a rotating speed regulation and control system and other core modules; all the modules are organically matched, a set of gear transmission and hydraulic transmission combined mode is provided, a double-fan system provides controllable flexible damping for the wind process, and stress of a mooring column rotating mechanism and stress of a mooring cable can be well balanced; meanwhile, by setting a safety threshold value and combining an intelligent regulation and control method, the wind aligning process of the double-fan system is controlled to be in a safe and reasonable state all the time, and safety and stability of the whole period of the wind aligning process of the double-fan system are guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of offshore wind power generation, and relates to a mooring column rotational speed regulation system during the in-situ mooring and wind alignment process of a dual-head offshore wind turbine; in particular, it relates to a mooring column rotational speed regulation system and method during the in-situ mooring and wind alignment process of a dual-head offshore wind turbine. Background Art

[0002] With the rapid development of social economy, the exacerbation of energy and environmental problems has promoted the development of offshore clean energy development. The ocean contains rich clean energy. At present, offshore wind power generation technology is the most efficient and mature solution for offshore clean energy development; however, the high manufacturing cost of offshore wind turbine platforms is one of the main obstacles restricting the commercial development of offshore wind power. The dual-wind turbine offshore wind power generation system can improve the utilization rate of offshore wind turbine platforms, reduce the average cost of wind power generation, and improve the efficiency of sea use, which is one of the hot directions in the development of offshore wind power generation technology at present. However, the wind alignment process of the dual-wind turbine platform is much more complex than that of the traditional single-wind turbine. The coupling of complex offshore wind loads, waves, and ocean current loads with the dynamic process of dual-wind turbine wind alignment poses a great challenge to the safety and durability of the multi-wind turbine system. Therefore, it is very necessary to regulate the rotational speed of the platform mooring column during the wind alignment process of the dual-wind turbine system. Summary of the Invention

[0003] In view of the above problems, the object of the present invention is to propose a mooring column rotational speed regulation system during the in-situ mooring and wind alignment process of a dual-head offshore wind turbine.

[0004] The technical solution of the present invention is as follows: A mooring column rotational speed regulation system during the in-situ mooring and wind alignment process of a dual-head offshore wind turbine described in the present invention includes a mooring column and two platform columns. A connecting truss is installed on the mooring column and the platform columns, and the mooring column and the platform columns are fixedly connected through the connecting truss;

[0005] The mooring column includes a mooring floating body column,

[0006] A wind turbine connecting column and a rotational speed regulation system are installed on the mooring floating body column. Sleeve grooves are opened on the base wall surfaces of the mooring floating body column and the wind turbine connecting column, and balls are installed inside the sleeve grooves.

[0007] Furthermore, the wind turbine connecting column includes a connecting column body and a transmission gear. The connecting column body is connected to the adjacent platform column through the connecting truss, and the transmission gear is connected to the rotational speed regulation system.

[0008] Furthermore, the rotational speed regulation system includes a gear brake, a brake gear, a gear column, a transmission gear, a transmission rack, a transmission piston, a hydraulic oil tank, an oil pump, and a single-chip microcomputer;

[0009] The bottom end of the gear brake is fixedly installed on the mooring floating body column, a brake gear is installed at its upper end, a gear column and a transmission gear are fixedly connected to the upper end of the brake gear, and the gear brake, the brake gear, and the transmission gear are all connected to the gear column;

[0010] One side of the brake gear meshes and drives with the adjacent transmission gear;

[0011] The transmission gear meshes and drives with a transmission rack, and the transmission gear meshing and driving with the transmission rack forms a set of gear transmission mechanism.

[0012] Furthermore, a limiter is installed at the top of the transmission rack, its bottom is connected to a transmission piston, the transmission piston is sleeved inside a hydraulic oil tank, and an oil tank limiter is installed at the top of the hydraulic oil tank;

[0013] The hydraulic oil tank is connected to an installed oil pump, a tachometer is connected to the oil pump, and the hydraulic oil tank, the oil pump and the tachometer form a set of hydraulic system;

[0014] A pressure regulator is also connected to the hydraulic oil tank, and a pressure sensor is installed inside the pressure regulator.

[0015] Furthermore, the oil pump, the pressure regulator and the tachometer are respectively connected to a single-chip microcomputer, and the oil pump and the pressure regulator are respectively connected to the hydraulic oil tank.

[0016] Furthermore, the oil pump, the pressure regulator and the tachometer are respectively installed on the mooring floating body column.

[0017] Furthermore, two sets of wind turbine towers are fixedly installed on the two platform columns, a set of wind power generation units are respectively installed on the tops of the two sets of wind turbine towers, and the two sets of wind power generation units jointly form a dual-head wind turbine system.

[0018] Furthermore, mooring cables connecting the platforms are also installed on both sides of the outer wall of the mooring column.

[0019] Furthermore, the connecting truss is made of high-strength and corrosion-resistant materials.

[0020] Furthermore, for the control method of the mooring column rotation speed control system during the in-situ mooring and wind alignment process of a dual-head offshore wind turbine, the operation steps are as follows:

[0021] Step (1): The dual-head wind turbine performs wind alignment work, the wind turbine connecting column starts to rotate under the action of the wind turbine torque, the tachometer continuously monitors the rotation speed of the wind turbine connecting column, and the pressure sensor in the pressure regulator continuously monitors the internal pressure of the hydraulic oil tank;

[0022] Step (2): The single-chip microcomputer determines whether the wind alignment work is completed, that is, whether the rotational speed of the fan connection column is 0;

[0023] (2.1): When the wind alignment work is completed, the wind alignment work ends;

[0024] (2.3): When the wind alignment work is not completed, go to step (3);

[0025] Step (3): The single-chip microcomputer determines whether the oil pressure in the hydraulic oil tank is less than the safety oil pressure;

[0026] (3.1): When the oil pressure in the hydraulic oil tank is not less than the safety oil pressure, the gear brake brakes, the dual-head fan stops the wind alignment work, the fan blades increase the windward angle to reduce the windward area, thereby reducing the torque; at the same time, the pressure regulator opens for pressure relief and gives an emergency condition alarm. After the maintenance personnel confirm, the brake is opened to restore the working state, and step (1) is looped;

[0027] (3.2): When the oil pressure in the hydraulic oil tank is less than the safety oil pressure, go to step (4);

[0028] Step (4): The single-chip microcomputer determines whether the rotational speed of the fan connection column is greater than the safety rotational speed;

[0029] (4.1): When the rotational speed of the fan connection column is greater than the safety rotational speed, the single-chip microcomputer controls the oil pump to pump liquid oil into the hydraulic oil tank, and step (1) is looped;

[0030] (4.2): When the rotational speed of the fan connection column is not greater than the safety rotational speed; step (1) is looped.

[0031] The beneficial effects of the present invention are as follows: 1. The present invention proposes a combination of gear drive and hydraulic drive, and the dual-fan system provides controllable flexible damping during the wind alignment process, which can well balance the forces on the mooring column rotating structure and the mooring cable, ensuring the safety and durability of the entire system; 2. Through the intelligent regulation method, the present invention combines a regulation system suitable for the rotational speed of the mooring column of the dual-fan platform to ensure the safety and stability of the entire cycle of the wind alignment process of the dual-fan system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structural schematic diagram of the system of the present invention;

[0033] Figure 2 is the structural schematic diagram of the mooring column in the present invention;

[0034] Figure 3 is the partial enlarged schematic diagram of the connection of the mooring column transmission mechanism in the present invention;

[0035] Figure 4It is a schematic connection diagram of the mooring floating body column, the fan connection column and the rotational speed regulation system of the present invention;

[0036] Figure 5 It is a schematic composition diagram of the rotational speed regulation system of the present invention;

[0037] Figure 6 It is a flow chart of the rotational speed regulation process of the present invention;

[0038] In the figure: 1 is the mooring column, 10 is the ball, 11 is the mooring floating body column, 12 is the fan connection column, 13 is the rotational speed regulation system,

[0039] 121 is the connection column body, 122 is the transmission gear;

[0040] 130 is the gear brake, 131 is the brake gear, 132 is the gear column, 133 is the transmission gear, 134 is the transmission rack, 135 is the transmission piston, 136 is the hydraulic oil tank, 137 is the oil pump, 138 is the voltage regulator, 139 is the tachometer;

[0041] 141 is the stopper, 142 is the oil tank stopper;

[0042] 2 is the platform column, 20 is the single-chip microcomputer;

[0043] 3 is the connection truss;

[0044] 4 is the fan tower;

[0045] 5 is the wind power generation set;

[0046] 6 is the mooring cable. Specific implementation mode

[0047] The following further elaborates on the specific technical solutions of the present invention with reference to specific examples.

[0048] As shown in the figure, a rotational speed regulation system for the mooring column during the in-situ mooring and wind alignment process of a dual-head offshore wind turbine according to the present invention mainly includes a mooring column 1, a platform column 2, a connection truss 3, a fan tower 4, a wind power generation set 5 and a mooring cable 6;

[0049] Among them, the mooring column 1 and the platform column 2 are made of high-strength and corrosion-resistant materials and are fixedly connected together through the connection truss 3, providing a stable installation and working platform for the offshore wind turbine. The entire platform adopts a single-point mooring method and is connected to the mooring column 1 through the mooring cable 6 to moor the entire wind turbine platform. Two sets of fan towers 4 are respectively fixedly installed above the column 2, and a set of wind power generation sets 5 are respectively installed on the tops of the fan towers 4, thus forming a dual-head fan system.

[0050] Such as Figure 2-5As shown, the mooring post 1 is mainly composed of a mooring floating body column 11, a fan connecting column 12, and a rotational speed control system 13;

[0051] Among them, the mooring floating body column 11 serves as the periphery of the mooring post 1, providing the main buoyancy for the mooring post 1 and an installation space for the upper mechanism. The mooring floating body column 11 and the fan connecting column 12 are respectively provided with socket grooves on their base walls, and ball bearings 10 are installed inside the socket grooves, which can play a role in limiting the connection of the socket grooves and reduce the dynamic friction when relative displacement occurs between the mooring floating body column 11 and the fan connecting column 12, so as to facilitate the wind-facing operation of the fan system;

[0052] The fan connecting column 12 includes a connecting column body 121 and a transmission gear 122. The connecting column body 121 is connected to the adjacent platform column 2 through a connecting truss 3, forming a rotating system capable of transmitting torque during the wind-facing operation of the fan. The transmission gear 122 is connected to the rotational speed control system 13 to adjust the rotational speed of the fan connecting column 12 to ensure the long-term and stable operation of the fan during the wind-facing process;

[0053] The rotational speed control system 13 is mainly composed of a gear brake 130, a brake gear 131, a gear column 132, a transmission gear 133, a transmission rack 134, a transmission piston 135, a hydraulic oil tank 136, an oil pump 137, a voltage regulator 138, a tachometer 139, and a single-chip microcomputer 20;

[0054] Among them, the gear brake 130 is installed at the bottom of the brake gear 131, and the other end is fixed on the mooring floating body column 11. During normal operation, the gear brake 130 releases the rotational freedom of the brake gear 131. When extreme working conditions occur, the brake 130 brakes and locks the rotational freedom of the brake gear 131, and the wind-facing operation can be stopped;

[0055] The gear brake 130, the brake gear 131, and the transmission gear 133 are all connected to the gear column 132. Among them, the brake gear 131, the gear column 132, and the transmission gear 133 are fixedly connected, and the brake gear 131 meshes with the transmission gear 122 for transmission, and the transmission gear 133 meshes with the transmission rack 134 to form a set of gear transmission mechanisms;

[0056] A limiter 141 is installed at the top of the transmission rack 134 to prevent slippage, and its bottom is connected to the transmission piston 135. The transmission piston 135 is sleeved inside the hydraulic oil tank 136, and an oil tank limiter 142 is installed at the top of the hydraulic oil tank 136 to prevent slippage;

[0057] The hydraulic oil tank 136 is connected to the oil pump 137. The oil pump 137 regulates the internal oil pressure of the hydraulic oil tank 136 by pumping and sucking liquid oil into the hydraulic oil tank 136, forming a hydraulic system;

[0058] The pressure regulator 138 is connected to the hydraulic oil tank 136, and a pressure sensor is provided inside it. During operation, it monitors the pressure in the hydraulic oil tank 136 in real time. When the pressure in the hydraulic oil tank 136 is abnormal, it quickly releases the pressure to ensure the safe operation of the entire system;

[0059] The rotational speed control system 13 regulates the resistance of the fan connecting column 12 to rotate around the mooring buoy column 11 by combining a gear transmission system and a hydraulic transmission system, so as to regulate the fan to be in a safe and stable rotational speed range during the wind-facing process.

[0060] As Figure 6 shown, a rotational speed control system and method for a mooring column during the in-situ mooring and wind-facing process of a dual-head offshore wind turbine include the following steps:

[0061] 1. The dual-head fan performs the wind-facing work. The fan connecting column 12 starts to rotate under the action of the fan torque. The tachometer 139 continuously monitors the rotational speed of the fan connecting column 12, and the pressure sensor in the pressure regulator 138 continuously monitors the internal pressure of the hydraulic oil tank 136;

[0062] 2. The single-chip microcomputer 20 determines whether the wind-facing work is completed, that is, whether the rotational speed of the fan connecting column 12 is 0;

[0063] 2.1. When the wind-facing work is completed, the wind-facing work ends;

[0064] 2.2. When the wind-facing work is not completed, go to step 3;

[0065] 3. The single-chip microcomputer 20 determines whether the oil pressure in the hydraulic oil tank 136 is less than the safe oil pressure;

[0066] 3.1. When the oil pressure in the hydraulic oil tank 136 is not less than the safe oil pressure, the gear brake 130 brakes, and the dual-head fan stops the wind-facing work. The fan blades increase the windward angle to reduce the windward area, thereby reducing the torque; at the same time, the pressure regulator 138 opens to release the pressure and gives an emergency condition alarm. After the maintenance personnel confirm, the brake 130 is opened to restore the working state, and loop to step 1;

[0067] 3.2. When the oil pressure in the hydraulic oil tank 136 is less than the safe oil pressure, go to step 4;

[0068] 4. The single-chip microcomputer 20 determines whether the rotational speed of the fan connecting column 12 is greater than the safe rotational speed;

[0069] 4.1. When the rotational speed of the fan connection column 12 is greater than the safe rotational speed, the single-chip microcomputer 20 controls the oil pump 137 to pump liquid oil into the hydraulic oil tank 136, and step 1 is cycled;

[0070] 4.2. When the rotational speed of the fan connection column 12 is not greater than the safe rotational speed; step 1 is cycled.

[0071] Working principle of the present invention: 1. The present invention forms a set of control system for regulating the rotational speed of the mooring column of the dual-fan platform through a combination of gear transmission and hydraulic transmission; 2. The present invention controls the wind process of the dual-fan system to always be in a safe and reasonable state by setting a safety threshold and combining intelligent control means.

Claims

1. A mooring column speed control system for a twin-head offshore wind turbine in-situ mooring process, characterized in that: It comprises a mooring column (1) and two platform columns (2), a connecting truss (3) is installed on the mooring column (1) and the platform column (2), and the mooring column (1) and the platform column (2) are fixedly connected via the connecting truss (3); The mooring column (1) includes a mooring floating body column (11), A fan connecting column (12) and a speed control system (13) are installed on the mooring buoy column (11), and sleeve grooves are opened on the base wall surfaces of the mooring buoy column (11) and the fan connecting column (12), and balls (10) are installed inside the sleeve grooves.

2. According to claim 1, a mooring column speed control system for a twin-head offshore wind turbine in-situ mooring process is characterized in that: The fan connecting column (12) comprises a connecting column (121) and a transmission gear (122); the connecting column (121) is connected to an adjacent platform column (2) via a connecting truss (3); and the transmission gear (122) is connected to a speed control system (13).

3. According to claim 2, a mooring column speed control system for a twin-head offshore wind turbine in-situ mooring process is characterized in that: The speed control system (13) comprises a gear brake (130), a brake gear (131), a gear column (132), a transmission gear (133), a transmission rack (134), a transmission piston (135), a hydraulic oil tank (136), an oil pump (137) and a single chip computer (20); The bottom end of the gear brake (130) is fixed on the mooring buoy column (11), and a brake gear (131) is installed on the upper end thereof. A gear column (132) and a transmission gear (133) are fixed on the upper end of the brake gear (131), and the gear brake (130), the brake gear (131) and the transmission gear (133) are all connected to the gear column (132); One side of the brake gear (131) is meshed with the adjacent transmission gear (122) for transmission. The transmission gear (133) and the transmission rack (134) are meshed and transmitted, and the transmission gear (133) and the transmission rack (134) are meshed and transmitted to form a set of gear transmission mechanism.

4. The mooring column speed control system for the in-situ mooring of a dual-head offshore wind turbine according to claim 3 is characterized in that: A limiter (141) is installed on the top of the transmission rack (134), and the bottom of the transmission rack (134) is connected to the transmission piston (135). The transmission piston (135) is sleeved inside the hydraulic oil tank (136), and an oil tank limiter (142) is installed on the top of the hydraulic oil tank (136). The hydraulic oil tank (136) is connected to an installed oil pump (137), and a speed meter (139) is connected to the oil pump (137). The hydraulic oil tank (136), the oil pump (137) and the speed meter (139) form a hydraulic system. A pressure regulator (138) is also connected to the hydraulic oil tank (136), and a pressure sensor is installed inside the pressure regulator (138).

5. The mooring column speed control system for the in-situ mooring of a dual-head offshore wind turbine according to claim 4 is characterized in that: The oil pump (137), the pressure regulator (138), and the speed meter (139) are respectively connected to the single chip computer (20), and the oil pump (137) and the pressure regulator (138) are respectively connected to the hydraulic oil tank (136).

6. The mooring column speed control system for the in-situ mooring of a dual-head offshore wind turbine according to claim 5 is characterized in that: The oil pump (137), the pressure regulator (138) and the speed meter (139) are respectively installed on the mooring buoy column (11).

7. The mooring column speed control system for the in-situ mooring of a dual-head offshore wind turbine according to claim 1 is characterized in that: Two sets of wind turbine towers (4) are fixedly mounted on the two platform columns (2), and a set of wind turbine generator sets (5) is respectively mounted on the top of the two sets of wind turbine towers (4). The two sets of wind turbine generator sets (5) together form a dual-head wind turbine system.

8. The mooring column speed control system for the in-situ mooring of a dual-head offshore wind turbine according to claim 1 is characterized in that: Mooring cables (6) connected to the platform are also installed on both sides of the outer wall of the mooring column (1).

9. The mooring column speed control system for the in-situ mooring of a dual-head offshore wind turbine according to claim 1 is characterized in that: The connecting truss (3) is made of high-strength, corrosion-resistant material.

10. A control method for a mooring column speed control system for a twin-head offshore wind turbine in-situ mooring process according to any one of claims 1 to 9, characterized in that: The operation steps are as follows: Step (1), the double-head fan performs wind-directed operation, the fan connecting column (12) starts to rotate under the action of the fan torque, the tachometer (139) continuously monitors the rotation speed of the fan connecting column (12), and the pressure sensor in the pressure regulator (138) continuously monitors the internal pressure of the hydraulic oil tank (136); Step (2), the single chip computer (20) determines whether the wind operation is completed, that is, whether the speed of the fan connecting column (12) is 0; (2.1) When the wind-facing work is completed, end the wind-facing work; (2.3) When the wind work is not completed, go to step (3); Step (3), the single chip computer (20) determines whether the oil pressure in the hydraulic oil tank is less than the safety oil pressure; (3.1) When the oil pressure in the hydraulic oil tank (136) is not less than the safety oil pressure, the gear brake (130) is braked, the double-head fan stops working on the wind, and the fan blades increase the windward angle to reduce the windward surface, thereby reducing the torque; at the same time, the voltage regulator (138) is opened to release the pressure, and an emergency working condition alarm is issued. After confirmation by the maintenance personnel, the brake (130) is opened to resume the working state, and step (1) is repeated; (3.2) When the oil pressure in the hydraulic oil tank (136) is lower than the safety oil pressure, proceed to step (4); Step (4), the single chip computer (20) determines whether the rotation speed of the fan connecting column (12) is greater than the safe rotation speed; (4.1) When the speed of the fan connecting column (12) is greater than the safe speed, the single chip microcomputer (20) controls the oil pump (137) to pump liquid oil into the hydraulic oil tank (136), and the step (1) is repeated; (4.2) When the speed of the fan connecting column (12) is not greater than the safe speed, loop step (1).

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