Double-machine-head fan system and control method

Abstract

The invention discloses a double-machine-head fan system which comprises a first wind driven generator and a second wind driven generator, the first wind driven generator and the second wind driven generator are located on a fan tower barrel, the fan tower barrel is located on stand columns, the two stand columns are connected with a mooring column through a connecting truss, the mooring column is connected with a mooring rope, and the mooring rope is connected with a mooring rope. Stress sensors are installed on the first wind driven generator and the second wind driven generator, the mooring column comprises a mooring floating body stand column, a draught fan connecting column, a ball, an electric braking clamping groove and a motor, the mooring floating body stand column is provided with the electric braking clamping groove, and the electric braking clamping groove is connected with the motor; the stress sensor is in signal connection with the central processing unit, and the central processing unit is in signal connection with the fan blade brake, the motor and the fan head rotation controller. According to the double-machine-head fan adjusted by means of wind power, wind alignment can be adjusted according to the environment wind direction and wind speed in the wind alignment process of the fan, and good adaptability and energy saving performance are achieved.

Description

Technical Field

[0001] The invention relates to a double-head fan system and a control method, belonging to the technical field of offshore wind power generation. Background Art

[0002] The ocean is rich in clean energy. At present, offshore wind power generation technology is the most efficient and technologically mature solution for the development of offshore clean energy. However, the high manufacturing cost of offshore wind turbine platforms is one of the main obstacles to the commercial development of offshore wind power generation. Therefore, improving the utilization rate of offshore wind turbine platforms and developing multi-wind turbine technology to reduce the average cost of wind power generation and improve sea use efficiency are one of the hot directions in the development of wind power generation technology at this stage. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a dual-head fan system and a control method. With the help of the dual-head fans with wind force adjustment, the fans can adjust the wind according to the ambient wind direction and wind speed, and have good adaptability and energy saving.

[0004] Technical solution: To solve the above technical problems, the dual-head wind turbine system of the present invention comprises a first wind turbine and a second wind turbine, the first wind turbine and the second wind turbine are respectively located on the wind turbine tower, the wind turbine tower is located on a column, the two columns are connected to the mooring column through a connecting truss, the mooring column is connected to the mooring cable, force sensors are installed on the first wind turbine and the second wind turbine, the mooring column comprises a mooring buoy column, a wind turbine connecting column, a ball, an electric brake slot and a motor, the wind turbine connecting column is provided with a groove, a sleeve groove A is provided at the bottom and the side wall of the groove, a sleeve groove B is provided at a corresponding position of the wind turbine connecting column, the wind turbine connecting column is inserted into the groove, the sleeve groove A and the sleeve groove B are inserted, an electric brake slot is provided on the mooring buoy column, the electric brake slot is connected to the motor, and the electric brake slot is controlled by the motor to lock the wind turbine connecting column; the force sensor is connected to the central processing unit signal, and the central processing unit is connected to the fan blade brake, the motor and the wind turbine head rotation controller signal.

[0005] A control method for a dual-head fan system comprises the following steps:

[0006] S1: Wind direction and anemometer obtain wind direction and wind speed changes and transmit wind condition information to the central processor;

[0007] S2: The central processor determines whether to adjust the wind direction of the dual-head platform according to the transmitted wind condition information;

[0008] S3: When the wind adjustment of the double-head platform is required, the central processor transmits control signals to the fan blade brake, the fan head rotation controller, and the motor to perform the wind adjustment operation of the double-head platform.

[0009] Preferably, the operation of S2 includes the following steps:

[0010] S2.1 When the central processor determines that the wind direction has not changed, the double-head fan operates normally, and the wind adjustment operation of the double-head platform is not started, and the operation of step S2.1 is looped;

[0011] S2.2 When the central processor determines that the wind direction has changed, the wind adjustment operation process S3 of the double-head platform is started.

[0012] Preferably, S3 includes the following steps:

[0013] S3.1 The central processor determines whether the wind direction change angle a is within: 0° < a ≤ 180°, where the wind direction change angle a is defined as the angle between the wind direction before change and the wind direction after change. The change of the wind direction in the clockwise direction of the current wind direction is positive, and the counterclockwise direction is negative; when the central processor 72 determines that the wind direction change angle a is within: 0° < a ≤ 180°, the motor is turned on to release the rotational freedom of the fan connection column, and the fan connection column rotates freely under the action of the torque; at the same time, the fan head rotation controller of the first wind turbine controls the fan to rotate clockwise for wind alignment. When the front of the fan is facing the changed wind direction, the fan head rotation controller is always in the wind-aligned state; when the central processor 72 determines that the wind direction change angle a is not within: 0° < a ≤ 180°, the motor is turned on to release the rotational freedom of the fan connection column, and the fan connection column rotates freely under the action of the torque. At the same time, the fan head rotation controller of the second wind turbine controls the fan to rotate counterclockwise for wind alignment. When the front of the fan is facing the changed wind direction, the fan head rotation controller is always in the wind-aligned state;

[0014] S3.2 The central processor determines whether the windward force F N of the fan head is less than or equal to the safe windward force F S of the platform for wind adjustment, where F S is the safe windward force of the platform for wind adjustment, which is the magnitude of the windward force of the fan corresponding to the wind pressure moment that enables the mooring post to rotate safely and smoothly. When the windward force F N of the fan head is less than or equal to the safe windward force F S of the platform for wind adjustment, the central processor determines whether the fan and the platform are still rotating around the mooring post, that is, enter step 6; when the windward force F N of the fan head is not less than the safe windward force F S of the platform for wind adjustment, the first wind turbine and the second wind turbine simultaneously control the head rotation controller to control the reduction of the fan blade attack angle α, and continue with step 3.2;

[0015] S3.3 The central processor determines whether the wind turbine and the platform are still rotating around the mooring column: when the central processor determines that the wind turbine and the platform are still rotating around the mooring column, it continues its own working state and loops 3.1; when the central processor determines that the wind turbine and the platform are not rotating around the mooring column, the central processor controls the motor to brake the mooring column; at the same time, it controls the wind turbine head rotation controller to stop working, and the wind turbine blade brake is released, so that the wind turbine can generate electricity normally.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0017] 1. The present invention uses the wind force-adjustable double-head fan to adjust the wind, so that the fan can adjust the wind according to the ambient wind direction and wind speed, and has good adaptability and energy saving.

[0018] 2. The present invention combines the sleeve groove and ball roller structure and cooperates with the electric slot to enable the mooring column to flexibly switch its movement mode, thereby improving the stability of the entire platform when the wind turbine is working normally. At the same time, the rotational freedom of the wind turbine connecting column can be released during the wind-facing process of the dual-head platform, and the friction can be reduced by the ball, making the wind-facing process smoother, faster and more energy-saving.

[0019] 3. The present invention designs a detailed control process of the double-head fan wind system and controls the double-head fan wind by intelligent means, which has a high degree of automation and good adaptability to deep sea operation.

[0020] 4. The present invention effectively improves the structural safety of the platform mooring column and the stability of the entire system by regulating the blade attack angle of the aircraft head to the wind. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 : Schematic diagram of the overall structure of the system of the present invention.

[0022] Figure 2 : Schematic diagram of the mooring column structure of the present invention.

[0023] Figure 3 : Schematic diagram of the fan wind system composition of the present invention.

[0024] Figure 4 : Flow chart of the fan wind process of the present invention.

[0025] Figure 5 : Flow chart of the blower judgment start-up wind operation of the present invention.

[0026] Figure 6 : Flow chart of the fan wind operation process of the present invention.

[0027] Figure 7:Schematic diagram of the wind alignment operation of the fan of the present invention, taking the case where the wind direction change angle a is not between 0° < a ≤ 180° as an example. Detailed implementation manner

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] As Figure 1 shown, a dual-head fan platform system mainly consists of a mooring column 1, a column 2, a connecting truss 3, a mooring cable 4, a fan tower 5, a first wind turbine 6, and a second wind turbine 7; 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 connecting truss 3. The overall density is less than that of water, and the span between the mooring column 1 and the column 2 is sufficient, providing an installation and working platform with good stability for the offshore fan. The entire platform adopts a single-point mooring method and is connected to the mooring column 1 through the mooring cable 4 to moor the entire fan platform. Above the column 2, a fan tower 5 is fixedly installed. At the top of the fan tower 5, a first wind turbine 6 and a second wind turbine 7 are respectively installed. The first wind turbine is installed in the counterclockwise direction of the mooring column 1, and the second wind turbine 7 is installed in the clockwise direction of the mooring column 1.

[0030] As Figure 2 shown, the mooring column 1 includes a mooring floating body column 11, a fan connection column 12, a ball 13, an electric braking slot 14, and a motor 15. Among them, the mooring floating body column 11 is the peripheral structure of the mooring column 1, providing the main buoyancy for the mooring column 1 and an installation space for the upper mechanism. The mooring floating body column 11 and the fan connection column 12 are respectively provided with sleeve grooves on their base walls. Inside the sleeve grooves, balls 13 are installed, which can play a role in limiting the connection of the sleeve grooves and reduce the dynamic friction when relative displacement occurs between the mooring floating body column 11 and the fan connection column 12, so as to facilitate the wind alignment work of the fan system; the electric braking slot 14 is fixedly installed on the mooring floating body column 11, and the upper part is connected and installed with a motor 15. Through the clamping and release of the slot, the braking of the fan connection column 12 and the release of the rotational freedom can be realized, so as to adjust the working stability of the fan platform and assist the wind alignment work of the fan system. Force sensors are installed on the first wind turbine and the second wind turbine, and the force sensors are signal-connected to the central processor.

[0031] As Figure 3As shown, the wind control system of the dual-head wind turbine platform is mainly composed of a wind direction and anemometer 71, a central processor 72, a fan blade brake 73, a fan head rotation controller 74, and a motor 75. According to the actual project situation, they will be installed on the wind turbine platform and connected to the power system of the wind turbine and the wind turbine working status monitoring system. The wind direction and anemometer 71 is used to detect the wind direction and wind speed information of the wind turbine working sea area in real time, and transmit the wind direction and wind speed information to the central processor 72, and the central processor 72 processes the wind direction and wind speed information, integrates and compares it with the wind turbine operating status information, generates a control signal through a control method, and transmits the control signal to the fan blade brake 73, the fan head rotation controller 74, and the motor 75 to jointly realize the wind control operation of the wind turbine.

[0032] like Figure 4 As shown, a control method for a dual-head fan system includes the following steps:

[0033] S1: The wind direction and anemometer 71 obtains the wind direction and wind speed changes and transmits the wind condition information to the central processor 72;

[0034] S2: The central processing unit 72 determines whether to adjust the wind direction of the dual-head platform according to the transmitted wind condition information;

[0035] S3: When the dual-head platform needs to adjust the wind, the central processor 72 transmits the control signal to the fan blade brake 73, the fan head rotation controller 74, and the motor 75 to adjust the wind of the dual-head platform.

[0036] like Figure 5 As shown, the S2 operation includes the following steps:

[0037] 1. The central processor 72 receives wind energy information from the wind direction and anemometer 71;

[0038] 2. The central processing unit 72 determines whether the wind direction has changed;

[0039] 2.1 When the central processor 72 determines that the wind direction has not changed, the dual-head fan operates normally, the dual-head platform wind adjustment operation is not started, and the S1 step is cycled;

[0040] 2.2 When the central processor 72 determines that the wind direction has changed, that is, the change in the wind direction change angle a is greater than 5°, PS: The wind direction change angle is defined as the angle between the wind direction before the change and the wind direction after the change. The change in wind direction is positive in the clockwise direction of the current wind direction and negative in the counterclockwise direction. The dual-head platform wind adjustment operation process S3 is started.

[0041] like Figure 6 , Figure 7 As shown, × indicates fan blade braking. Indicates the operation of the fan blade, Indicates the steering brake of the fan head or mooring post, Indicates the rotation of the fan head or the opening of the mooring post brake. The operation of S3 includes the following steps:

[0042] 1. The central processor 72 controls the fan blade brake 73 to stop the fan. Meanwhile, the force sensor in the nacelle monitors the windward force FN of the fan head in real time;

[0043] 2. The central processor 72 calculates the magnitude of the wind direction change angle;

[0044] 3. The central processor 72 determines whether the wind direction change angle a is within: 0° < a ≤ 180°; where the wind direction change angle a is defined as the angle between the wind direction before change and the wind direction after change. A change in wind direction in the clockwise direction from the current wind direction is positive, and in the counterclockwise direction is negative;

[0045] 3.1 When the central processor 72 determines that the wind direction change angle a is within: 0° < a ≤ 180°, the motor 75 is turned on to release the rotational freedom of the fan connection column 12, and the fan connection column 12 rotates freely under the action of the torque; meanwhile, the fan head rotation controller 74 of the first wind turbine 6 controls the fan to rotate clockwise for wind alignment. When the front of the fan is facing the changed wind direction, the fan head rotation controller 74 is always in the wind alignment state

[0046] 3.2 When the central processor 72 determines that the wind direction change angle a is not within: 0° < a ≤ 180°, the motor 75 is turned on to release the rotational freedom of the fan connection column 12, and the fan connection column 12 rotates freely under the action of the torque; meanwhile, the fan head rotation controller 74 of the second wind turbine 7 controls the fan to rotate counterclockwise for wind alignment. When the front of the fan is facing the changed wind direction, the fan head rotation controller 74 is always in the wind alignment state;

[0047] 4. The central processor 72 determines the windward force F N of the fan head whether it is less than or equal to the platform wind alignment safety force F S , where the platform wind alignment safety force is the magnitude of the windward force of the fan corresponding to the wind pressure moment that enables the safe and stable rotation of the mooring post 1;

[0048] 4.1 When the windward force FN of the fan head is less than or equal to the platform wind alignment safety force FS, the central processor 72 determines whether the fan and the platform are still rotating around the mooring post 1, that is, enter step 6;

[0049] 4.2 When the windward force FN of the fan head is greater than the platform wind alignment safety force FS, the first wind turbine 6 and the second wind turbine 7 simultaneously control the head rotation controller 74 to control and reduce the fan blade attack angle α;

[0050] 5. The CPU 72 determines whether:

[0051] The platform's safety force against wind FS ≥ the windward force against the wind turbine head FN;

[0052] 5.1 When the platform's wind safety force FS ≥ the wind turbine head wind force FN, the central processor 72 determines whether the wind turbine and the platform are still rotating around the mooring column 1, and then enters step 6;

[0053] 5.2 When the platform safety force FS against the wind is less than the wind turbine head force FN, the first wind turbine 6 and the second wind turbine 7 simultaneously control the head rotation controller 74 to control the reduction of the wind turbine blade attack angle α, that is, entering a new cycle of 4.2;

[0054] 6. The CPU 72 determines whether the wind turbine and the platform are still rotating around the mooring column 1;

[0055] 6.1 When the CPU 72 determines that the wind turbine and the platform are still rotating around the mooring column 1, it continues to work and loops 3.1 or 3.2.

[0056] 6.2 When the central processor 72 determines that the wind turbine and the platform are not rotating around the mooring column 1, the central processor 72 controls the motor 75 to brake the mooring column 1; at the same time, the wind turbine head rotation controller 74 is controlled to stop working, and the wind turbine blade brake 73 is released to enable the wind turbine to generate electricity normally.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A double-head wind turbine system, the double-head comprises a first wind turbine and a second wind turbine, the first wind turbine and the second wind turbine are respectively located on a wind turbine tower, the wind turbine tower is located on a column, the two columns are connected to a mooring column through a connecting truss, and the mooring column is connected to a mooring cable, characterized in that: Force sensors are installed on the first wind turbine and the second wind turbine. The mooring post includes a mooring floating body column, a fan connection column, a ball, an electric braking slot and a motor. The fan connection column is provided with a groove, and sleeve grooves A are provided at the bottom and side walls of the groove. Sleeve grooves B are provided at the corresponding positions of the fan connection column. The fan connection column is snapped into the groove, and balls are snapped into the sleeve grooves A and B. An electric braking slot is provided on the mooring floating body column, and the electric braking slot is connected to the motor. The motor is used to control the electric braking slot to lock the fan connection column. The force sensor is signal-connected to the central processor, and the central processor is signal-connected to the fan blade brake, the motor and the fan head rotation controller.

2. A control method for a dual-head fan system as claimed in claim 1, characterized in that: It includes the following steps: S1: The wind direction and speed meter obtain the changes in wind direction and speed and transmit the wind condition information to the central processor; S2: The central processor determines whether to perform the wind alignment adjustment work for the dual-head platform based on the transmitted wind condition information; S3: When the wind alignment adjustment work for the dual-head platform needs to be performed, the central processor transmits control signals to the fan blade brake, the fan head rotation controller, and the motor to perform the wind alignment adjustment operation for the dual-head platform.

3. The control method of the dual-head fan system according to claim 1, characterized in that: The work of S2 includes the following steps: S2.1 When the central processor determines that the wind direction has not changed, the dual-head fan operates normally, and the wind alignment adjustment operation for the dual-head platform is not started, and the work of step S1 is looped; S2.2 When the central processor determines that the wind direction has changed, the wind alignment adjustment operation process S3 for the dual-head platform is started.

4. The control method of the dual-head fan system according to claim 2 or 3, characterized in that: The S3 is as follows: S3.1 The central processor determines whether the wind direction change angle a is in the range of 0° < a ≤ 180°. The wind direction change angle a is defined as the angle between the wind direction before the change and the wind direction after the change. The changed wind direction is positive in the clockwise direction of the current wind direction and negative in the counterclockwise direction. When the central processor determines that the wind direction change angle a is in the range of 0° < a ≤ 180°, the motor is turned on to release the rotational freedom of the fan connection column, and the fan connection column rotates freely under the action of the torque. At the same time, the fan head rotation controller of the first wind turbine controls the fan to rotate clockwise for wind alignment. When the front of the fan is facing the changed wind direction, the fan head rotation controller is always in the wind alignment state. When the central processor determines that the wind direction change angle a is not in the range of 0° < a ≤ 180°, the motor is turned on to release the rotational freedom of the fan connection column, and the fan connection column rotates freely under the action of the torque. At the same time, the fan head rotation controller of the second wind turbine controls the fan to rotate counterclockwise for wind alignment. When the front of the fan is facing the changed wind direction, the fan head rotation controller is always in the wind alignment state; S3.2 CPU determines the windward force F of the fan head N Is it less than or equal to the platform's wind safety force F? S , where F S The wind pressure moment corresponding to the wind force on the wind turbine that ensures the safe and stable rotation of the mooring column is the platform's windward force. N Less than or equal to the platform's wind safety force F S The CPU determines whether the wind turbine and the platform are still rotating around the mooring column, and then enters step S3.3; when the wind turbine head is subjected to the windward force F N Not less than the platform's wind safety force F S , the first wind turbine and the second wind turbine simultaneously control the head rotation controller to reduce the wind turbine blade attack angle α, and continue with step S3.2; S3.3 The central processor determines whether the fan and the platform are still rotating around the mooring post: When the central processor determines that the fan and the platform are still rotating around the mooring post, it continues its own working state and loops the work of S3.1; When the central processor determines that the fan and the platform are not rotating around the mooring post, the central processor controls the motor to brake the mooring post; At the same time, it controls the fan head rotation controller to stop working, and the fan blade brake releases the brake to enable the wind turbine to generate electricity normally.

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