Wind power generation method for marine vessel navigation

Abstract

The present invention relates to a wind power generation method for marine vessel navigation. Under the action of wind energy, and by means of a rigid connection, a vertical-axis wind turbine drives a constant-pressure oil pump to output hydraulic energy. A rotation speed sensor monitors the rotation speed of a blade shaft of the vertical-axis wind turbine in real time; and a hydraulic distributor receives a feedback signal from the rotation speed sensor so as to automatically control each generator set. By means of the hydraulic distributor separately outputting hydraulic energy of rated pressure to each generator set, the present invention can acquire 380V and 220V alternating current and 48V direct current; and for each circuit, rated hydraulic energy is provided for a hydraulic-driven generator unit to generate power stably, and generated electrical energy is combined and fed into a vessel microgrid, thus fully utilizing wind energy and reaching a wind energy conversion rate of 60% or higher.

Description

A wind power generation method for offshore ship navigation TECHNICAL FIELD

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

[0002] When the ship is sailing, there are true wind, ship wind, apparent wind and instantaneous impact wind, and a technology is needed to convert wind energy into electric energy under the action of various wind forces, while ensuring high conversion rate of wind power energy conversion.

[0003] According to the conventional wind power generator, when the wind power generator runs at a high wind speed, the voltage rises and the current changes greatly, and the generator and the power grid system are impacted and lost. The current super wind speed protection technology state and some main protection measures are as follows: 1, blade variable pitch; 2, emergency stop; 3, overspeed protection; 4, main power grid protection; 5, vibration protection; 6, temperature protection; 7, brake pressure protection; 8, clutch protection; 9, wind direction protection; 10, lightning protection. In addition, the conventional wind power generator is also provided with a power limiting function, when the power is higher than 5% of the rated value, the fan will also brake and stop. These protection measures make the wind power generator run safely under extreme weather conditions, but the wind energy conversion rate is lost by more than 50%, and the fan needs to pass through a mechanical speed increasing device to generate electricity, which loses about 10% of wind energy, resulting in a wind energy generation conversion rate of less than 20%, directly affecting the economic benefit of power generation. SUMMARY

[0004] The purpose of the present application is to overcome the above-mentioned shortcomings, and provide a wind power generation method for offshore ship navigation. Through the vertical type multi-angle fan, the wind resistance area is maximized, the wind energy is effectively converted into hydraulic energy, the hydraulic energy is formed through the intermediate link liquid energy conversion technology, the high and low speed of the fan at the rated pressure determines the amount of liquid energy flow, the liquid energy distributor outputs the rated pressure liquid energy to each generator set respectively, 380V, 220V alternating current and 48V direct current can be obtained, each way has a rated liquid energy for the hydraulic power generator set to generate electricity stably, and the electric energy is combined and input into the ship micro-grid. This technology can fully absorb wind energy, and the wind energy conversion rate is more than 60%.

[0005] The purpose of the present application is achieved in that a wind power generation method for navigation of a marine vessel, a vertical wind turbine is driven by a rigid connection to output hydraulic energy under the action of wind energy, a rotational speed sensor monitors the blade shaft rotational speed of the vertical wind turbine in real time, a hydraulic distributor receives the feedback signal of the rotational speed sensor to control each generator set as follows: when the vessel is at anchor, the vertical wind turbine is driven by the true wind, the hydraulic distributor receives the feedback signal of the rotational speed sensor, and 1-2 auxiliary generator sets are started to provide power for life and communication navigation equipment; when the vessel is sailing, the vertical wind turbine is driven by the sailing wind, the wind amount and rotational speed of the wind wheel blades of the vertical wind turbine are greatly increased, the hydraulic distributor receives the feedback signal of the rotational speed sensor, and one main generator set is started to provide power for the working of the vessel navigation power equipment, and 1-2 auxiliary generator sets are started to provide power for life and communication navigation equipment; when the wind is too large, the hydraulic distributor opens the remaining auxiliary generator sets as needed to convert excess wind energy, and the hydraulic distributor appropriately increases or decreases the number of auxiliary generator sets according to the size of the apparent wind; when all generator sets are fully loaded, the overflow valve is opened, and the excess hydraulic oil is supplemented to the hydraulic accumulator, and the excess hydraulic oil flows back to the oil tank after the hydraulic accumulator is full; when the pressure of the sudden wind system is too high or the power grid fails, each generator set stops working, and the overflow valve is opened; when the wind is insufficient, the hydraulic accumulator releases the hydraulic distributor on the hydraulic tank, the hydraulic distributor redistributes the hydraulic power to the generator set, maintains the normal power generation of the generator set, and automatically closes the corresponding generator set according to the distribution level of the local area network.

[0006] Preferably, the hydraulic distributor controls the flow of hydraulic oil into each generator set, and controls the operation of each generator set, the generator set is divided into a main generator set and an auxiliary generator set according to function, the main generator set is provided with one, and the auxiliary generator set is provided with 3-7, the main generator set obtains 380V alternating current for power equipment of the vessel, and the auxiliary generator set obtains 220V alternating current for life power of the vessel or obtains 48V for communication equipment.

[0007] Preferably, each generator set comprises a hydraulic motor and a generator, a power output shaft of the hydraulic motor is connected with a power input shaft of the generator, and the electric energy generated by each generator is combined into a vessel micro-grid combination cabinet, and the vessel micro-grid combination cabinet is connected with a micro-grid energy management system.

[0008] Preferably, an inlet pipe of the hydraulic motor is connected with an overflow pipe, an overflow valve is arranged on the overflow pipe, and the hydraulic oil in the overflow pipe is divided into two paths, one of which enters the hydraulic accumulator, and the other of which enters the oil tank.

[0009] Preferably, a flow regulating valve is arranged on the inlet pipe of the hydraulic motor, the flow of the inlet of the hydraulic motor is adjusted by controlling the flow regulating valve, and the rated rotational speed and torque of the fixed displacement motor output are realized by adjusting the opening size of the valve port to drive each generator.

[0010] Preferably, the oil tank supplements hydraulic oil to the constant pressure oil pump through the oil supplement pump, and supplements the leaked hydraulic oil in the hydraulic system in time.

[0011] The beneficial effects of the present application are: through the vertical multi-angle fan, the wind resistance area is maximized, the 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 fan at the rated pressure determines the amount of liquid energy flow, the liquid energy of the rated pressure is output to each generator set through the liquid energy distributor, 380V, 220V alternating current and 48V direct current can be obtained, each route has a rated liquid energy for the hydraulic power generator set to generate electricity stably, the electric energy is combined and input into the ship micro-grid, this technology can fully absorb wind energy, the wind energy conversion rate is more than 60%(the maximum utilization coefficient of wind energy according to the Betz theory is 0.593), the output electric energy quality and the power grid are stably matched, the best economic benefit of the green electricity industry is highlighted, the natural wind power is fully utilized, the energy loss of mechanical transmission is reduced, the wind power generation conversion efficiency is significantly improved, the hydraulic system has low energy loss and long service life, the hydraulic energy is conducted to the ground machine room, the system equipment components have good installation and storage conditions, and maintenance and repair are extremely convenient, energy closed cycle management and utilization can be realized, and are not limited by size and space, no hard wear is generated during work, heat generated by liquid force is easy to transmit and dissipate, and the present application is very suitable for ship micro-wind power station and similar scene wind energy micro-grid. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 is a schematic diagram of the principle of a wind power generation method for a ship sailing at sea according to the present application.

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

[0014] Referring to Figure 1, the present application relates to a wind power generation system for marine vessels, comprising a vertical wind turbine 1, a constant pressure oil pump 2, an oil tank 3, a hydraulic distributor 4, a hydraulic motor 5, a generator 6 and a hydraulic accumulator 7, a rotating 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 tank 3, the oil tank 3 is equipped with the hydraulic distributor 4, the hydraulic distributor 4 is connected to multiple 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 integrated into a marine micro-grid combination cabinet 9, and the marine micro-grid combination cabinet 9 is connected to a micro-grid energy management system 10. The electric energy generated by the wind power generation system is integrated into the marine micro-grid, and the wind power grid connection process is completed.

[0015] A flow regulating valve 11 is arranged on the liquid inlet pipe of the hydraulic motor 5, the flow of the liquid inlet of the hydraulic motor 5 is regulated by controlling the flow regulating valve 11, and the rated rotating speed and torque of the quantitative motor output are realized by adjusting the size of the valve opening to drive each generator 6.

[0016] The liquid inlet pipe is connected to an overflow pipe, the overflow pipe is provided with an overflow valve 12, the hydraulic oil in the overflow pipe is divided into two routes, one of which enters the hydraulic accumulator 7, and the other of which enters the oil tank 3, the hydraulic accumulator 7 is connected to the hydraulic distributor 4 on the oil tank 3, and the hydraulic power is redistributed by the hydraulic distributor 4.

[0017] The wind power of the vertical wind turbine 1 is fed back to the hydraulic distributor 4 in real time through the rotating speed sensor 8, the hydraulic distributor 4 controls the inflow of the hydraulic oil into each generator set, controls the operation of each generator set, the generator sets are divided into main generator sets and auxiliary generator sets according to functions, one main generator set is arranged, and 3-7 auxiliary generator sets are arranged, the main generator set obtains 380V alternating current for power equipment of the ship, and the auxiliary generator set obtains 220V alternating current for domestic power supply of the ship or obtains 48V for communication equipment.

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

[0019] The oil tank 3 supplements the hydraulic oil into the constant pressure oil pump 2 through the oil supplement pump 14, the leaked hydraulic oil in the hydraulic system is supplemented in time, the hydraulic system continuously works, the hydraulic oil in the hydraulic system is cooled, and the working performance of the hydraulic element is improved.

[0020] The application discloses a wind power generation method for a marine vessel, which comprises the following steps: a wind power generation system for a marine vessel is adopted, a vertical wind turbine is driven by rigid connection to output hydraulic energy by a constant pressure oil pump under the action of wind energy, a rotating speed sensor 8 is used to monitor the rotating speed of the blade shaft of the vertical wind turbine in real time, and a hydraulic distributor receives feedback signals of the rotating speed sensor to control each generator set as follows: when the vessel is at anchor (at a station), the vertical wind turbine is driven to rotate by real wind, the hydraulic distributor receives feedback signals of the rotating speed sensor, 1-2 auxiliary generator sets are started, and power supply for life and communication navigation equipment is provided; when the vessel is sailing, the vertical wind turbine is driven to rotate by sailing wind, the wind receiving amount and rotating speed of the wind wheel blade of the vertical wind turbine are greatly increased, the hydraulic distributor receives feedback signals of the rotating speed sensor, one main generator set is started, power supply for vessel sailing power equipment is provided, and 1-2 auxiliary generator sets are started to provide power supply for life and communication navigation equipment; when the wind is too large, the hydraulic distributor starts the rest auxiliary generator sets according to needs to convert the excess wind energy, and the hydraulic distributor appropriately increases or reduces the number of auxiliary generator sets according to the variation of apparent wind.

[0021] When all the generator sets are fully loaded, the overflow valve is opened, the excess hydraulic oil is supplemented to the hydraulic accumulator, and the excess hydraulic oil is returned to the oil tank after the hydraulic accumulator is filled; when the system pressure is too high or the power grid fails and the power grid loses pressure, the generator sets stop working, and the overflow valve is opened; under the action of sudden wind, the hydraulic system pressure is too high, the overflow valve is opened to prevent the system from causing voltage fluctuation due to the too high pressure, the hydraulic oil is divided into two paths, one path enters the hydraulic accumulator, and the other path is urgently released to the oil tank; when the power grid fails and the power grid loses pressure, the hydraulic accumulator absorbs the excess hydraulic energy converted from wind energy and stores the excess hydraulic energy.

[0022] When the wind is insufficient, the hydraulic accumulator releases the hydraulic distributor on the hydraulic force storage tank, the hydraulic distributor re-distributes the hydraulic power to the generator sets, the normal power generation of the generator sets is maintained, and the corresponding generator sets are automatically closed according to the power distribution level of the local area network.

[0023] In addition to the above-mentioned embodiments, the application also includes other implementation manners, and any technical solution formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the application.

Claims

1. A method of wind power generation for navigation of a marine vessel at sea, characterized by: The vertical fan is driven by rigid connection to output hydraulic energy under the action of wind energy, and the rotational speed sensor monitors the blade shaft rotational speed of the vertical fan in real time. The hydraulic distributor receives the feedback signal of the rotational speed sensor to control each generator set as follows: when the ship is at anchor, the vertical fan is driven by the real wind, the hydraulic distributor receives the feedback signal of the rotational speed sensor, and 1-2 auxiliary generator sets are started to provide power for life and communication navigation equipment; When the ship is sailing, the vertical fan is driven by sailing wind, the wind amount and rotational speed of the wind wheel blade of the vertical fan are greatly increased, the hydraulic distributor receives the feedback signal of the rotational speed sensor, and 1 main generator set is started to provide power for ship sailing equipment, and 1-2 auxiliary generator sets are started to provide power for life and communication navigation equipment; When the wind is too large, the hydraulic distributor opens the remaining auxiliary generator sets as needed to convert excess wind energy, and the hydraulic distributor appropriately increases or decreases the number of auxiliary generator sets according to the size of the apparent wind; When all generator sets are fully loaded, the overflow valve is opened, and the excess hydraulic oil is supplemented to the hydraulic accumulator. When the hydraulic accumulator is full, the excess hydraulic oil flows back to the oil tank. When the pressure of the sudden wind system is too high or the power grid fails, each generator set stops working, and the overflow valve is opened. When the wind is insufficient, the hydraulic accumulator releases the hydraulic distributor on the hydraulic tank, the hydraulic distributor redistributes hydraulic power to the generator set, maintains normal power generation of the generator set, and automatically closes the corresponding generator set according to the power distribution level of the local area network.

2. A method of wind power generation for navigation of a marine vessel according to claim 1, characterized in that: The hydraulic distributor controls the flow of hydraulic oil into each generator set, controls the operation of each generator set, the generator set is divided into main generator sets and auxiliary generator sets according to functions, the main generator set is provided with 1, and the auxiliary generator set is provided with 3-7. The main generator set obtains 380V alternating current for power equipment of the ship, and the auxiliary generator set obtains 220V alternating current for life power of the ship or obtains 48V for communication equipment.

3. A method of wind power generation for navigation of a marine vessel 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 with the power input shaft of the generator, and the electric energy generated by each generator is combined into a ship micro-grid combination cabinet, and the ship micro-grid combination cabinet is connected with a micro-grid energy management system.

4. A method of wind power generation for navigation of a marine vessel according to claim 3, characterized in that: The inlet pipe of the hydraulic motor is connected with an overflow pipe, the overflow pipe is provided with an overflow valve, and the hydraulic oil in the overflow pipe is divided into two paths, one of which enters the hydraulic accumulator, and the other of which enters the oil tank.

5. A method of wind power generation for navigation of a marine vessel according to claim 3, characterized in that: The inlet pipe of the hydraulic motor is provided with a flow regulating valve, the inlet flow of the hydraulic motor is adjusted by controlling the flow regulating valve, and the rated rotational speed and torque of the quantitative motor are realized by adjusting the opening size of the valve port to drive each generator.

6. A method of wind power generation for navigation of a marine vessel according to claim 1, characterized in that: The oil tank supplements hydraulic oil into the constant pressure pump through an oil supplementing pump to supplement the leaked hydraulic oil in the hydraulic system in time.

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