[0031] Best embodiment:
[0032] Reference attached figure 1 And figure 2 , A floating offshore wind farm wave energy auxiliary power generation device, including a wind turbine 1 and a floating platform 2. The wind turbine 1 is located on a barge-type or round table floating platform 2 and uses sea breeze to generate electricity. The floating platform 2 adopts a small upper part and a large lower part to ensure sufficient buoyancy to make the wind turbine float on the sea surface and control the water penetration depth of the floating platform. The lower part of the floating platform 2 is anchored to the seabed by ropes 3 and maintained in a tensioned state, so as to ensure that the floating platform does not oscillate in the vertical direction under the action of sea waves. The internal structures of the floating platforms 2, 12, and 15 are all the same, and the floating platform 2 is taken as an example for description below.
[0033] An air hole is opened on both sides of the floating platform 2, which are an air inlet 4 and an air outlet 5 respectively. The air outlet 5 is connected to a pipe and connected to the air inlet of the next floating platform 12. Both the air inlet 4 and the air outlet 5 are provided with a one-way air valve (the one-way air valve at the air outlet is not shown) to ensure that the air at the two air holes flows in one way and the other flows. The air inlet 4 is set as a total air inlet for wave energy utilization in the wind farm, and is connected with an air inlet passage 19 that opens upward, and the air inlet passage 19 is guaranteed to be exposed to the sea surface. There are three air chambers inside the floating platform, namely the inlet chamber 6, the middle air chamber 7 and the outlet chamber 8. The three air chambers are connected in sequence with the inlet chamber 6 as the head and the outlet chamber 8 as the tail. Two adjacent air chambers A vent hole is opened between the two air chambers, and the vent hole is provided with a venting one-way air valve 21 to ensure that the air between the air chambers can only flow in one direction, that is, one-way from the inlet chamber 6 to the outlet chamber 8. An air chamber channel is formed. Among the air chambers located on both sides of the floating platform, the air inlet chamber 6 communicates with the outside through the air inlet 4, and the air outlet chamber 8 conveys compressed air to the next stage of the floating platform or air turbine through the air outlet 5.
[0034] There is a water chamber under each air chamber to exchange air with it, such as figure 2 , The air inlet chamber 6 corresponds to the water chamber 9, the intermediate air chamber 7 corresponds to the water chamber 10, and the outlet air chamber 8 corresponds to the water chamber 11. Two ventilation holes are opened between each air chamber and its corresponding water chamber, and a ventilation check valve 18 with opposite directions is respectively arranged to ensure one hole for air intake and one for air outlet. The water chamber is in direct contact with sea water, and the volume of air in the water chamber changes with the fluctuation of the waves. For example, when the water chamber 9 encounters a wave crest, the sea water squeezes the air in the water chamber 9 to increase its pressure, the air inlet and ventilation holes of the water chamber are closed, the air outlet and ventilation holes are opened, and the air passes through the outlet ventilation holes. Flow to the corresponding air chamber 6. The air pressure in the air chamber 6 increases, and the air is forced into the next-stage air chamber 7 through the venting check valve 21. When the water chamber 9 encounters a wave trough, the volume of air in the water chamber 9 becomes larger and the pressure becomes smaller, so the outlet and ventilation holes of the water chamber 9 are closed, the intake ventilation holes are opened, and the air in the air chamber 6 is ventilated through the intake air. The hole flows into the water chamber 9 to replenish the air in the water chamber 9, and at the same time, external air enters the air chamber 6 through the air inlet 4 to replenish the air pressure. The working principles of the remaining air chambers and water chambers are the same as those described above. The waves are used to transfer and compress air to the right step by step.
[0035] Because the floating platform 2 is restricted by the rope 3 and does not move in the vertical direction, it moves relative to the seawater surface, continuously sucking in external air from the inlet 4 and compressing it step by step to the outlet 5 of the lower floating platform to enter the interior of the next floating platform 12. In addition, part of the outer surfaces of the air intake chamber 6 and the intermediate air chamber 7 located on both sides of the floating platform are in seawater, which can cool the compressed air, realize inter-stage cooling of air multi-stage compression, and improve air compression efficiency.
[0036] In order to prevent seawater from entering the air chamber, there are two water level sensors on the side wall of each water chamber, namely a high water level sensor and a low water level sensor, such as water chamber 9, the two sensors are respectively located at the high water level 13 and the low water level 14 . Under normal circumstances, the one-way valves at the two ventilation holes operate normally. When the water level is higher than the high water level 13, the two ventilation holes in the water chamber are completely closed. When the water level drops to between the high water level 13 and the low water level 14, the ventilation holes are still closed. When the water level drops below the water level low point 14, the two ventilation holes are opened, and the ventilation one-way valve resumes work.
[0037] The floating platforms in the wind farm are interconnected by pipelines, and the compressed air is compressed step by step in several floating platforms through the interconnected pipelines, and finally reaches the floating platform 15. The outlet air hole of the floating platform 15 is connected to an air turbine 16 on the floating platform through an airflow channel 20, and compressed air is used to drive the turbine to rotate and drive the alternator 17 to generate electricity.
[0038] Reference attached image 3 Part of the electricity generated by the wave energy is used as the internal control system of the offshore wind turbine, including the pitch and yaw system, the internal air conditioner, the tower elevator, etc., and the other part is stored in the compensation battery. When the power generated by the wind turbine is insufficient due to fluctuations, the controller starts the battery to generate power to quickly compensate the output power and achieve the stability of the power output.
[0039] On the basis of the present invention, the floating offshore wind farm wave energy auxiliary power generation device is also suitable for a single wind turbine with an air turbine to work independently. Multiple wind turbines can also be equipped with an air turbine. The air turbine can share a floating platform with the wind turbine, or use a floating platform alone.
[0040] The invention proposes a new type of wave energy auxiliary power generation device for offshore wind farms. The wind turbine floating platform in the wind farm is a barge type or a round table floating on the sea, and is anchored to the seabed with ropes. The floating platform is equipped with a wave energy auxiliary power generation device, and the floating platforms in the wind farm are interconnected by pipelines. The device realizes the comprehensive utilization of offshore wind energy and wave energy power generation, forms complementarity in the complex and changeable offshore power generation environment, and improves the stability and economy of the power generation system. The present invention has the following technical points and technical effects:
[0041] 1. Converting wave energy into electric energy, as a supplement and auxiliary to wind power generation, realizes the comprehensive utilization of both offshore wind energy and wave energy, effectively combining wave energy into deep-sea wind power, realizing the complementarity of power in complex environments, ensuring The stable power output is conducive to grid connection.
[0042] 2. The battery is used to compensate the output power, and the response is rapid, which solves the problem of power compensation lag caused by the slow implementation of the variable pulp mechanism.
[0043] 3. The wave energy auxiliary power generation device absorbs the wave energy around the wind turbine, reduces the impact of waves on the floating platform, makes the floating platform more stable, not easy to overturn, and improves the reliability of the system.
[0044] 4. Multi-floating platforms are interconnected to realize the large-scale utilization of wave energy. The floating platforms realize the step-by-step compression of air, and the use of sea water can ensure good inter-stage cooling, improve the efficiency of air compression, and increase the efficiency of energy conversion.
[0045] 5. Use the electricity generated by wave energy to supply power to auxiliary devices in the wind turbine, saving part of energy. The organic combination of the two kinds of energies and they work together on the floating platform, which significantly improves the economy and practicability of the device.
[0046] The undescribed parts of the present invention are the same as the prior art.
