Wind power generation method for marine ship navigation

Abstract

The invention relates to a wind power generation method for marine ship navigation, a vertical fan drives a constant pressure oil pump to output hydraulic energy through rigid connection under the action of wind energy, a rotating speed sensor monitors the rotating speed of a blade shaft of the vertical fan in real time, and a hydraulic distributor receives a feedback signal of the rotating speed sensor to automatically control each generator set. Liquid energy with rated pressure is 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 sets with hydraulic power to stably generate electricity, generated electric energy is combined and input into a ship-ship micro-grid, wind energy is comprehensively absorbed, and the wind energy conversion rate reaches 60% or above.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power generation, and in particular to a wind power generation method for offshore ship navigation. Background Art

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

[0003] Conventionally, when the wind turbine is running at a higher wind speed, the voltage rises and the current changes greatly, the generator and the power grid system are impacted and damaged. The current over-wind speed protection technology and some major protection measures are: 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. New protection; 9. Wind direction protection; 10. Lightning protection. In addition, conventional wind turbines are also equipped with a power limitation function. When the power is 5% higher than the rated value, the wind turbine will also brake and stop. These protection measures allow wind turbines to operate safely under extreme weather conditions, but the wind energy conversion rate is lost by more than 50%. The wind turbine needs to pass through a mechanical speed increase device to generate electricity, and then loses about 10% of wind energy, resulting in a wind power conversion rate of less than 20%, which directly affects the economic benefits of power generation. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a wind power generation method for offshore ships. Through a vertical multi-angle wind turbine, the wind resistance area is accepted to the maximum extent, and wind energy is effectively converted into hydraulic energy. The hydraulic energy is formed through the intermediate link liquid energy conversion technology. The speed of the wind turbine at the rated pressure determines the amount of liquid energy flow. The rated pressure of liquid energy is output to each generator set through the liquid energy distributor, and 380V, 220V AC and 48V DC can be obtained. Each line has rated liquid energy for the hydraulically powered generator set to generate electricity stably, and the generated electricity is combined and input into the ship microgrid. This technology can fully absorb wind energy, and the wind energy conversion rate reaches more than 60%.

[0005] The object of the present invention is achieved in that: A wind power generation method for offshore ship navigation, a vertical wind turbine drives a constant pressure oil pump to output hydraulic energy through a rigid connection under the action of wind energy, a speed sensor monitors the blade shaft speed of the vertical wind turbine in real time, and a hydraulic distributor receives feedback signals from the speed sensor to control each generator set as follows: When the ship is moored, the vertical fan is driven by the real wind, and the hydraulic distributor receives the feedback signal from the speed sensor to start 1-2 auxiliary generator sets to provide electricity for living, communication and navigation equipment; When the ship is sailing, the vertical wind turbine is driven by the sailing wind, the wind volume and speed of the wind turbine blades increase significantly, the hydraulic distributor receives the feedback signal of the speed sensor, starts one main generator set to provide electricity for the ship's navigation power equipment, and starts 1-2 auxiliary generator sets to provide electricity for life and communication and navigation equipment; When the wind is too strong, the hydraulic distributor turns on the remaining auxiliary generator sets as needed to convert excess wind energy. According to the change in apparent wind speed, the hydraulic distributor appropriately increases or decreases the number of auxiliary generator sets. When all generator sets are working at full load, the overflow valve opens, and the excess hydraulic oil is added to the hydraulic accumulator. After the hydraulic accumulator is full, the excess hydraulic oil flows back to the oil storage tank; When there is a sudden change in wind pressure, the system pressure is too high or the grid fails and the grid loses pressure, all generator sets stop working and the overflow valve opens; When the wind is insufficient, the hydraulic accumulator releases the hydraulic distributor on the hydraulic oil storage tank, and the hydraulic distributor redistributes hydraulic power to the generator set to maintain 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.

[0006] Preferably, the hydraulic distributor controls the flow of hydraulic oil into each generator set to control the operation of each generator set. The generator sets are divided into main generator sets and auxiliary generator sets according to their functions. There is one main generator set and 3-7 auxiliary generator sets. The main generator set obtains 380V AC power to supply electricity to the ship's power equipment, and the auxiliary generator set obtains 220V AC power to supply electricity to the ship's life or obtains 48V to supply electricity to communication equipment.

[0007] Preferably, 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.

[0008] Preferably, the liquid inlet pipe of the hydraulic motor is connected to the overflow pipe, and the overflow pipe is provided with an overflow valve. 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.

[0009] Preferably, a flow regulating valve is provided on the liquid inlet pipe of the hydraulic motor, and the flow regulating valve is controlled to adjust the flow at the liquid inlet of the hydraulic motor, and the rated speed and torque of the quantitative motor are output by adjusting the valve opening size to drive each generator.

[0010] Preferably, the oil storage tank replenishes the hydraulic oil into the constant pressure oil pump through the oil replenishment pump, so as to replenish the hydraulic oil leaked in the hydraulic system in time.

[0011] The beneficial effects of the present invention are: Through the vertical multi-angle wind turbine, the wind resistance area is accepted to the maximum extent, and the wind energy is effectively converted into hydraulic energy. The hydraulic energy is formed through the intermediate link hydraulic energy conversion technology. The speed of the wind turbine at the rated pressure determines the amount of hydraulic energy flow. The rated pressure of hydraulic energy is output to each generator set through the hydraulic energy distributor, and 380V, 220V AC and 48V DC can be obtained. Each line has rated hydraulic energy to supply the hydraulic power generator set with stable power generation, and the generated electricity is combined and input into the ship microgrid. This technology can fully absorb wind energy, and the wind energy conversion rate reaches more than 60% (Betz's theoretical maximum wind energy utilization coefficient is 0.593), and the output power quality is stably matched with the power grid, highlighting the best economic benefits of the green power industry; It makes full use of natural wind power, reduces the energy loss of mechanical transmission, and significantly improves the conversion efficiency of wind power generation. The hydraulic system has low energy loss and long service life. It can be transmitted to the ground machine room through hydraulic pressure. The installation and storage conditions of system equipment components are excellent, and maintenance and repair are extremely convenient. It can realize energy closed cycle management and utilization without being restricted by size and space. It does not produce hard wear during operation, and the heat generated by hydraulic pressure is easy to transfer and dissipate. It is very suitable for wind energy microgrids in ship breeze power stations and similar scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a schematic diagram of the principle of a wind power generation method for offshore ship navigation.

[0013] Among them: vertical fan 1; constant pressure oil pump 2; oil storage tank 3; hydraulic distributor 4; hydraulic motor 5; generator 6; hydraulic accumulator 7; speed sensor 8; ship microgrid combination cabinet 9; microgrid energy management system 10; flow regulating valve 11; overflow valve 12; hydraulic energy parameter display cabinet 13; oil replenishment pump 14. DETAILED DESCRIPTION

[0014] See also Figure 1 The present invention relates to a wind power generation system for offshore ship navigation, comprising a vertical fan 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 speed sensor 8 is installed on the blade shaft of the vertical fan 1. The blade shaft of the vertical fan 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 a plurality of generator sets, each generator set comprises 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 a ship microgrid combination cabinet 9, and the ship microgrid combination cabinet 9 is connected to a microgrid energy management system 10. The electric power generated by the wind power generation system is incorporated into the ship microgrid to complete the wind power grid connection process.

[0015] A flow regulating valve 11 is provided on the liquid inlet pipe of the hydraulic motor 5. The flow regulating valve 11 is controlled to adjust the flow rate at the liquid inlet of the hydraulic motor 5. The rated speed and torque of the quantitative motor are output by adjusting the valve opening size to drive each generator 6.

[0016] The liquid inlet pipe is connected to the overflow pipe, and 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.

[0017] The wind force of the vertical fan 1 is fed back to the hydraulic distributor 4 in real time through the speed sensor 8. The hydraulic distributor 4 controls the hydraulic oil to flow into each generator set and controls the operation of each generator set. The generator sets are divided into main generator sets and auxiliary generator sets according to their functions. The main generator set is provided with 1 unit, and the auxiliary generator sets are provided with 3-7 units. The main generator set obtains 380V AC power for ship power equipment, and the auxiliary generator set obtains 220V AC power for ship life or obtains 48V for communication equipment.

[0018] The hydraulic distributor 4 is electrically connected to a hydraulic energy parameter display cabinet 13 to record the hydraulic energy distribution of the hydraulic distributor.

[0019] The oil storage tank 3 replenishes the hydraulic oil into the constant pressure oil pump 2 through the oil replenishment pump 14, replenishes the leaked hydraulic oil in the hydraulic system in time, thereby keeping the hydraulic system working continuously, and at the same time cools the hydraulic oil in the hydraulic system to improve the working performance of the hydraulic components.

[0020] A method for generating wind power for marine navigation comprises the following steps: using a wind power generation system for marine navigation, a vertical wind turbine drives a constant pressure oil pump to output hydraulic energy through a rigid connection under the action of wind energy, a speed sensor 8 monitors the blade shaft speed of the vertical wind turbine in real time, and a hydraulic distributor receives a feedback signal from the speed sensor to perform the following control on each generator set: When the ship is moored (stationed), the vertical fan is driven by the real wind, and the hydraulic distributor receives the feedback signal from the speed sensor to start 1-2 auxiliary generator sets to provide electricity for living and communication and navigation equipment; When the ship is sailing, the vertical wind turbine is driven by the sailing wind, the wind volume and speed of the wind turbine blades increase significantly, the hydraulic distributor receives the feedback signal of the speed sensor, starts one main generator set to provide electricity for the ship's navigation power equipment, and starts 1-2 auxiliary generator sets to provide electricity for life and communication and navigation equipment; When the wind is too strong, the hydraulic distributor turns on the remaining auxiliary generator sets as needed to convert excess wind energy. Depending on the change in apparent wind speed, the hydraulic distributor appropriately increases or decreases the number of auxiliary generator sets.

[0021] When all generator sets are working at full load, the overflow valve opens, and the excess hydraulic oil is added to the hydraulic accumulator. After the hydraulic accumulator is full, the excess hydraulic oil flows back to the oil storage tank; When there is a sudden change in wind force and the system pressure is too high or the grid fails and loses pressure, all generator sets stop working and the overflow valve opens; when the hydraulic system pressure is too high due to sudden change in wind force, in order to prevent the system from causing voltage fluctuations due to excessive pressure, the overflow valve opens, and the hydraulic oil is divided into two paths, one entering the hydraulic accumulator and the other urgently releasing pressure to the oil storage tank; when a grid failure causes the grid to lose pressure, the hydraulic accumulator absorbs the excess hydraulic energy converted from wind energy and stores it.

[0022] When the wind is insufficient, the hydraulic accumulator releases the hydraulic distributor on the hydraulic oil storage tank, and the hydraulic distributor redistributes hydraulic power to the generator set to maintain 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.

[0023] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A method for generating wind power for marine navigation, characterized in that: Under the action of wind energy, the vertical fan drives the constant pressure oil pump to output hydraulic energy through a rigid connection. The speed sensor monitors the blade shaft speed of the vertical fan in real time. The hydraulic distributor receives the feedback signal of the speed sensor to control each generator set as follows: When the ship is moored, the vertical fan is driven by the real wind, and the hydraulic distributor receives the feedback signal from the speed sensor to start 1-2 auxiliary generator sets to provide electricity for living, communication and navigation equipment; When the ship is sailing, the vertical wind turbine is driven by the sailing wind, the wind volume and speed of the wind turbine blades increase significantly, the hydraulic distributor receives the feedback signal of the speed sensor, starts one main generator set to provide electricity for the ship's navigation power equipment, and starts 1-2 auxiliary generator sets to provide electricity for life and communication and navigation equipment; When the wind is too strong, the hydraulic distributor turns on the remaining auxiliary generator sets as needed to convert excess wind energy. According to the change in apparent wind speed, the hydraulic distributor appropriately increases or decreases the number of auxiliary generator sets. When all generator sets are working at full load, the overflow valve opens, and the excess hydraulic oil is added to the hydraulic accumulator. After the hydraulic accumulator is full, the excess hydraulic oil flows back to the oil storage tank; When there is a sudden change in wind pressure, the system pressure is too high or the grid fails and the grid loses pressure, all generator sets stop working and the overflow valve opens; When the wind is insufficient, the hydraulic accumulator releases the hydraulic distributor on the hydraulic oil storage tank, and the hydraulic distributor redistributes hydraulic power to the generator set to maintain 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.

2. A method for generating wind power for marine navigation according to claim 1, characterized in that: The hydraulic distributor controls the flow of hydraulic oil into each generator set and controls the operation of each generator set. The generator sets are divided into main generator sets and auxiliary generator sets according to their functions. There is one main generator set and 3-7 auxiliary generator sets. The main generator set obtains 380V AC power to supply electricity to the ship's power equipment, and the auxiliary generator set obtains 220V AC power to supply electricity to the ship's life or obtains 48V to supply electricity to communication equipment.

3. A method for generating wind power for marine navigation according to claim 2, characterized in that: 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.

4. A method for generating wind power for marine navigation according to claim 3, characterized in that: The liquid inlet pipe of the hydraulic motor is connected to the overflow pipe, and an overflow valve is arranged 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.

5. A method for generating wind power for marine navigation according to claim 3, characterized in that: A flow regulating valve is provided on the liquid inlet pipe of the hydraulic motor. The flow rate at the liquid inlet of the hydraulic motor is adjusted by controlling the flow regulating valve. The rated speed and torque of the quantitative motor are outputted by adjusting the size of the valve opening to drive each generator.

6. A method for generating wind power for marine navigation according to claim 1, characterized in that: The oil storage tank replenishes the hydraulic oil into the constant pressure oil pump through the oil replenishment pump, so as to replenish the hydraulic oil leaked in the hydraulic system in time.

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