Wind power generation system for marine ship navigation

Abstract

The utility model relates to a wind power generation system for marine ship navigation, which comprises a vertical fan, a constant-pressure oil pump, an oil storage tank, a hydraulic distributor, a hydraulic motor, a generator and a hydraulic accumulator, a blade shaft of the vertical fan is provided with a rotating speed sensor and connected with the constant-pressure oil pump, and the rotating speed sensor is connected with the generator. The constant-pressure oil pump is connected with an oil storage tank, the oil storage tank is provided with a hydraulic distributor, the hydraulic distributor is connected with a plurality of generator sets, and electric energy generated by each generator set is merged into the ship micro-grid combined cabinet. According to the utility model, liquid energy with rated pressure is respectively output to each generator set through the liquid energy distributor, 380V and 220V alternating current and 48V direct current can be obtained, each path of liquid energy has rated liquid energy for the generator set with hydraulic power to stably generate electricity, the generated electric energy is combined and input into a ship-ship micro-grid, the wind energy is comprehensively absorbed, and the conversion rate of the wind energy reaches more than 60%.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power generation, and particularly relates to a wind power generation system for offshore ship navigation. Background Art

[0002] When a ship is sailing, there are true wind, ship-borne wind, apparent wind and instantaneous impact wind at the same time. There is a technology that can normally convert wind energy into electric energy under various wind forces, and at the same time ensure a high conversion rate of wind power to electricity.

[0003] Conventionally, when a wind turbine operates at a relatively high wind speed and the voltage rises and the current changes greatly, the generator and the power grid system are impacted and damaged. The current state of overspeed protection technology and some main protection measures are as follows: 1. Blade pitch change; 2. Emergency shutdown; 3. Overspeed protection; 4. Main grid protection; 5. Vibration protection; 6. Temperature protection; 7. Brake pressure protection; 8. Yaw protection; 9. Wind direction protection; 10. Lightning protection. In addition, conventional wind turbines are also equipped with a power limit function. When the power is higher than 5% of the rated value, the fan will also brake and stop. These protection measures ensure the safe operation of the wind turbine under extreme weather conditions, but the wind energy conversion rate is reduced by more than 50%. Moreover, the fan needs a mechanical speed increasing device to generate electricity, and about 10% of the wind energy is lost again, resulting in a wind energy conversion rate lower than 20%, directly affecting the economic benefits of power generation. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above deficiencies and provide a wind power generation system for offshore ship navigation. Through a vertical multi-angle fan, the wind resistance area is maximally received, and wind energy is effectively converted into hydraulic energy. Through an intermediate liquid energy conversion technology, hydraulic energy is formed. At the rated pressure, the rotational speed of the fan determines the amount of liquid energy flow. The liquid energy distributor outputs the liquid energy at the rated pressure to each generator set respectively, and 380V, 220V alternating current and 48V direct current can be obtained. Each circuit has a rated liquid energy to supply the generator set for hydraulic power to generate electricity stably. The generated electric energy is combined and input into the ship microgrid. This technology can fully consume wind energy, and the wind energy conversion rate reaches more than 60%.

[0005] The purpose of the utility model is achieved as follows:

[0006] A wind power generation system for marine ship navigation, comprising a vertical fan, a constant pressure oil pump, an oil storage tank, a hydraulic distributor, a hydraulic motor, a generator and a hydraulic accumulator. A rotational speed sensor is installed on the blade shaft of the vertical fan. The blade shaft of the vertical fan is connected to the constant pressure oil pump. The constant pressure oil pump is connected to the oil storage tank. The oil storage tank is equipped with a hydraulic distributor. The hydraulic distributor is connected to multiple generator sets. Each generator set includes a hydraulic motor and a generator. The power output shaft of the hydraulic motor is connected to the power input shaft of the generator. The electric energy generated by each generator is incorporated into the ship microgrid combination cabinet, and the ship microgrid combination cabinet is connected to the microgrid energy management system.

[0007] Preferably, a flow regulating valve is provided on the liquid inlet pipe of the hydraulic motor.

[0008] Preferably, the liquid inlet pipe of the hydraulic motor is connected to an overflow pipe. An overflow valve is provided on the overflow pipe. The hydraulic oil in the overflow pipe is divided into two paths. One path preferentially enters the hydraulic accumulator, and the other path enters the oil storage tank. The hydraulic accumulator is connected to the hydraulic distributor on the oil storage tank.

[0009] Preferably, the wind power of the vertical fan is real-time fed back to the hydraulic distributor through the rotational speed sensor. The hydraulic distributor controls the hydraulic oil to flow into each generator set. The generator sets are divided into main generator sets and auxiliary generator sets according to functions. There is 1 main generator set, and there are 3 - 7 auxiliary generator sets.

[0010] Preferably, the main generator set obtains 380V alternating current for the use of ship power equipment, and the auxiliary generator sets obtain 220V alternating current for the use of ship living electricity or obtain 48V for the use of communication equipment.

[0011] Preferably, the hydraulic distributor is electrically connected to a liquid energy parameter display cabinet.

[0012] Preferably, the oil storage tank replenishes the hydraulic oil into the constant pressure oil pump through a make-up oil pump.

[0013] The beneficial effects of the present utility model are as follows:

[0014] Through the vertical multi-angle fan, the wind resistance area is maximally received, and the wind energy is effectively converted into hydraulic energy. Through the intermediate liquid energy conversion technology, hydraulic energy is formed. At the rated pressure, the rotational speed of the fan determines the amount of liquid energy flow. Through the liquid energy distributor, the liquid energy of the rated pressure is respectively output to each generator set, and 380V, 220V alternating current and 48V direct current can be obtained. Each path has a rated liquid energy for the generator sets of hydraulic power to generate electricity stably. The generated electric energy is combined and input into the ship microgrid. This technology can fully consume wind energy, and the wind energy conversion rate reaches more than 60% (the maximum utilization coefficient of wind energy according to the Betz theory is 0.593). Moreover, the quality of the output electric energy is stably matched with the power grid, highlighting the best economic benefits in the green power industry;

[0015] Make full use of natural wind power, reduce the energy loss of mechanical transmission, significantly improve the conversion efficiency of wind power generation, have low energy loss and long service life in the hydraulic system, conduct hydraulic energy to the ground machine room, have excellent installation and storage conditions for system equipment components, and are extremely convenient for maintenance and repair; can realize the closed-loop management and utilization of energy, and are not restricted by size and space. There is no hard wear during operation, and the heat generated by hydraulic power is easy to transfer and dissipate, which is very suitable for ship micro wind power stations and wind energy microgrids in similar scenarios. Brief Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the principle of a wind power generation system for a marine ship navigation of the present utility model.

[0017] Wherein: vertical wind turbine 1; constant pressure oil pump 2; oil storage tank 3; hydraulic distributor 4; hydraulic motor 5; generator 6; hydraulic accumulator 7; rotational speed sensor 8; ship microgrid combination cabinet 9; microgrid energy management system 10; flow regulating valve 11; overflow valve 12; liquid energy parameter display cabinet 13; makeup oil pump 14. Specific Embodiments

[0018] See Figure 1 , the present utility model relates to a wind power generation system for a marine ship navigation, including a vertical wind turbine 1, a constant pressure oil pump 2, an oil storage tank 3, a hydraulic distributor 4, a hydraulic motor 5, a generator 6 and a hydraulic accumulator 7. A rotational speed sensor 8 is installed on the blade shaft of the vertical wind turbine 1. The blade shaft of the vertical wind turbine 1 is connected to the constant pressure oil pump 2. The constant pressure oil pump 2 is connected to the oil storage tank 3. The oil storage tank 3 is equipped with a hydraulic distributor 4. The hydraulic distributor 4 is connected to multiple generator sets. Each generator set includes a hydraulic motor 5 and a generator 6. The power output shaft of the hydraulic motor 5 is connected to the power input shaft of the generator 6. The electric energy generated by each generator 6 is incorporated into the ship microgrid combination cabinet 9. The ship microgrid combination cabinet 9 is connected to the microgrid energy management system 10. Incorporate the electric energy generated by the wind power generation system into the ship microgrid to complete the process of wind power grid connection.

[0019] A flow regulating valve 11 is provided on the liquid inlet pipe of the hydraulic motor 5. The flow rate of the liquid inlet of the hydraulic motor 5 is adjusted by controlling the flow regulating valve 11. The rated rotational speed and torque of the fixed-displacement motor are achieved by adjusting the opening degree of the valve port to drive each generator 6.

[0020] The liquid inlet pipe is connected to an overflow pipe. An overflow valve 12 is provided on the overflow pipe. The hydraulic oil in the overflow pipe is divided into two paths. One path enters the hydraulic accumulator 7, and the other path enters the oil storage tank 3. The hydraulic accumulator 7 is connected to the hydraulic distributor 4 on the oil storage tank 3, and the hydraulic power is redistributed by the hydraulic distributor 4.

[0021] The wind power of the vertical fan 1 is fed back to the hydraulic distributor 4 in real time through the rotational speed sensor 8. The hydraulic distributor 4 controls the flow of hydraulic oil into each generating set to control the operation of each generating set. The generating sets are divided into main generating sets and auxiliary generating sets according to their functions. There is 1 main generating set and 3 - 7 auxiliary generating sets. The main generating set obtains 380V alternating current for the use of the ship's power equipment, and the auxiliary generating sets obtain 220V alternating current for the ship's living electricity or 48V for the communication equipment.

[0022] The hydraulic distributor 4 is electrically connected to the liquid energy parameter display cabinet 13 to record the liquid energy distribution of the hydraulic distributor.

[0023] The oil storage tank 3 replenishes the hydraulic oil into the constant pressure oil pump 2 through the oil replenishing pump 14 to timely supplement the leaked hydraulic oil in the hydraulic system, thereby keeping the hydraulic system working continuously. At the same time, it cools the hydraulic oil in the hydraulic system to improve the working performance of the hydraulic components.

[0024] A wind power generation method for a marine ship during navigation includes the following steps: using a wind power generation system for a marine ship during navigation, the vertical fan drives the output of hydraulic energy of the constant pressure oil pump through rigid connection under the action of wind energy. The rotational speed sensor 8 monitors the rotational speed of the blade shaft of the vertical fan in real time. The hydraulic distributor receives the feedback signal of the rotational speed sensor and controls each generating set as follows:

[0025] When the ship is at anchor (in port), the vertical fan is driven by the true wind to rotate. The hydraulic distributor receives the feedback signal of the rotational speed sensor and starts 1 - 2 auxiliary generating sets to provide electricity for living and communication navigation equipment.

[0026] When the ship is sailing, the vertical fan is driven by the sailing wind to rotate. The air intake and rotational speed of the wind turbine blades of the vertical fan increase significantly. The hydraulic distributor receives the feedback signal of the rotational speed sensor, starts 1 main generating set to provide electricity for the operation of the ship's navigation power equipment, and at the same time starts 1 - 2 auxiliary generating sets to provide electricity for living and communication navigation equipment.

[0027] When the wind power is too strong, the hydraulic distributor turns on the remaining auxiliary generating sets as needed to convert the excess wind energy. According to the change of the apparent wind, the hydraulic distributor appropriately increases or decreases the number of auxiliary generating sets.

[0028] When all generating sets are working at full load, the overflow valve opens, and the excess hydraulic oil is replenished into the hydraulic accumulator. After the hydraulic accumulator is full, the excess hydraulic oil flows back to the oil storage tank.

[0029] When there is a situation where the pressure of the mutation wind system is too high or the power grid fails and the grid loses voltage, each generator set stops working and the overflow valve opens; when the pressure of the hydraulic system is too high under the action of the mutation wind force, to prevent voltage fluctuations in the system due to excessive pressure, the overflow valve opens, and the hydraulic oil is divided into two paths. One path enters the hydraulic accumulator, and the other path is emergently depressurized to the storage tank; when the power grid fails and causes the grid to lose voltage, the hydraulic accumulator absorbs the excess hydraulic energy converted from wind energy and stores it.

[0030] When the wind power is insufficient, the hydraulic accumulator releases the hydraulic distributor on the hydraulic oil storage tank. The hydraulic distributor redistributes the hydraulic power to the generator set to maintain the normal power generation of the generator set, and automatically shuts down the corresponding generator set according to the power distribution level of the local area network.

[0031] In addition to the above embodiments, the present utility model also includes other implementation manners. Any technical solutions formed by equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present utility model.

Claims

1. A wind power generation system for marine vessel navigation, characterized in that: It includes a vertical fan, a constant-pressure oil pump, an oil storage tank, a hydraulic distributor, a hydraulic motor, a generator, and a hydraulic accumulator. A speed sensor is installed on the blade shaft of the vertical fan. The blade shaft of the vertical fan is connected to the constant-pressure oil pump. The constant-pressure oil pump is connected to the oil storage tank. The oil storage tank is equipped with a hydraulic distributor. The hydraulic distributor is connected to multiple generator sets. Each generator set includes a hydraulic motor and a generator. The power output shaft of the hydraulic motor is connected to the power input shaft of the generator. The electric energy generated by each generator is incorporated into the ship microgrid combination cabinet, and the ship microgrid combination cabinet is connected to the microgrid energy management system.

2. The wind power generation system for offshore ship navigation according to claim 1, characterized in that: A flow regulating valve is provided on the liquid inlet pipe of the hydraulic motor.

3. The wind power generation system for marine ship navigation according to claim 2, characterized in that: The liquid inlet pipe of the hydraulic motor is connected to an overflow pipe. An overflow valve is provided on the overflow pipe. The hydraulic oil in the overflow pipe is divided into two paths. One path enters the hydraulic accumulator, and the other path enters the oil storage tank. The hydraulic accumulator is connected to the hydraulic distributor on the oil storage tank.

4. A wind power generation system for marine vessel navigation according to claim 1, characterized in that: The wind power of the vertical fan is fed back to the hydraulic distributor in real time through the speed sensor. The hydraulic distributor controls the hydraulic oil to flow into each generator set. The generator sets are divided into main generator sets and auxiliary generator sets according to their functions. There is 1 main generator set, and there are 3 - 7 auxiliary generator sets.

5. The wind power generation system for offshore ship navigation according to claim 4, characterized in that: The main generator set obtains 380V alternating current for the use of the ship's power equipment, and the auxiliary generator sets obtain 220V alternating current for the ship's living electricity or obtain 48V for the use of communication equipment.

6. The wind power generation system for marine ship navigation according to claim 1, wherein: The hydraulic distributor is electrically connected to the liquid energy parameter display cabinet.

7. A wind power generation system for offshore ship navigation according to claim 1, characterized in that: The oil storage tank replenishes the hydraulic oil into the constant-pressure oil pump through a makeup oil pump.

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