A vertical oscillation wave energy power generation and offshore booster station integrated device

Abstract

The present invention discloses a vertical oscillation wave energy power generation and offshore booster station integrated device, wherein wave energy conversion units are symmetrically installed on both sides of the jacket foundation, and the floating body module is hinged to the cross brace of the jacket foundation through connecting rods of different lengths. The floating body module performs heaving motion under the action of waves, converts wave energy into mechanical energy, and then converts it into high-pressure energy of hydraulic oil through a double-acting hydraulic cylinder. The high-pressure energy is stored in an accumulator, drives the hydraulic motor to work, and drives the generator to generate electricity. The present invention combines a wave energy power generation device with an offshore booster station, and shares a set of jacket foundations, boosting equipment, and power transmission equipment, thereby saving construction costs. Moreover, the electric energy of the wave energy power generation device can be used as a backup power supply for the booster station when the power grid is out of power, without the need to specially configure a backup power supply. At the same time, it can be supplied to the booster station locally for power load consumption. The excess electricity is boosted by a booster transformer and then transmitted to the land power grid via a submarine cable, thereby improving the economic efficiency of wave energy power generation.

Description

Technical Field

[0001] The invention relates to the technical field of development and utilization of marine renewable energy, and in particular to a vertical oscillation wave energy power generation and offshore booster station integrated device. Background Art

[0002] With the large-scale development of offshore wind farms, each wind farm is equipped with at least one booster station. However, the booster station and wave energy power generation equipment are often built separately, and the development cost of wave energy power generation is relatively high. Currently, a development model combining the two has not yet been formed.

[0003] The offshore substation is the power gathering center of the offshore wind farm. The electricity generated by all offshore wind turbines is gathered here, the voltage is boosted by the substation, and the electricity is transmitted to the land power grid via submarine cables to reduce the power loss during transmission.

[0004] Wave power generation is a device that converts wave energy into electrical energy. Generally, wave energy is first captured through a wave energy collection system, then converted into mechanical energy through a mechanical energy conversion device, and finally converted into electrical energy through a power generation system. In recent years, wave power generation technology has developed rapidly, and a variety of wave power generation devices have emerged, but generally require separate support platforms, boosting equipment and power transmission systems, which increases the manufacturing and construction installation costs and reduces the actual application value of the project.

[0005] If the offshore booster station and wave power generation are combined, the wave power generation device and the booster station will share a supporting foundation and a set of boosting and transmission equipment, which can greatly reduce the development cost of wave power generation and increase the overall benefits of wave power generation. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and propose a vertical oscillation wave energy power generation and offshore booster station integrated device, which combines offshore wave energy with offshore booster stations. The two share supporting structures, booster equipment and power transmission equipment, reducing the development cost of wave energy power generation and realizing the rational allocation and utilization of resources.

[0007] To achieve the above-mentioned purpose, the technical solution provided by the present invention is as follows: a vertical oscillation wave energy power generation and offshore booster station integrated device, comprising a jacket foundation, a booster station module, a hydraulic system and a power generation system; a double-layer support platform is formed on the top of the jacket foundation, the booster station module is installed on the first layer, the hydraulic system and the power generation system are installed on the second layer, the generator of the power generation system is connected to the hydraulic motor of the hydraulic system, and is driven by the hydraulic motor to generate electricity, that is, the mechanical energy of the hydraulic motor is converted into electrical energy; the bottom of the jacket foundation is fixed on the seabed by steel pipe piles, and two wave energy conversion units are symmetrically installed on two opposite sides of the jacket foundation, each wave energy conversion unit includes a plurality of floating body modules and connecting rods and double-acting hydraulic cylinders corresponding to the plurality of floating body modules, that is, one floating body module is equipped with a connecting rod and a double-acting hydraulic cylinder, and the lengths of all the connecting rods are not consistent, one end of each connecting rod is hinged to the same cross brace rod of the jacket foundation side by side through an articulated bearing, and the other end is connected to the floating body module, under the action of waves The floating module performs a vertical swing motion, driving the connecting rod to swing around the articulated bearing. The middle part of the connecting rod is connected to the piston rod of the double-acting hydraulic cylinder, so that the piston rod can reciprocate with the swing of the connecting rod, thereby driving the piston in the hydraulic cylinder to do work, converting the wave energy captured by the floating module into the high-pressure energy of the hydraulic oil, and in the event of severe sea conditions, the floating module can be lifted out of the water by rotating the connecting rod to avoid damage; the cylinder bodies of all double-acting hydraulic cylinders are tilted and hinged side by side on the same cross brace of the jacket foundation, and are located above the connecting rod, The double-acting hydraulic cylinder is connected to the accumulator of the hydraulic system through a high-pressure oil pipe, so that its high-pressure energy is stored in the accumulator, that is, high-pressure oil is stored in the accumulator, and then the accumulator drives the hydraulic motor to rotate; the hydraulic system, the power generation system and the two wave energy conversion units constitute a wave energy power generation device, which can be used as a backup power supply for the booster station when the power grid is cut off, and can supply power to the relevant power loads of the booster station when the power grid is not cut off, and the excess electricity is boosted by the booster station module and finally transmitted to the land power grid through the submarine cable.

[0008] Furthermore, the hydraulic system includes a bridge-type one-way valve group, an accumulator, a hydraulic motor, an oil tank, a relief valve, and a throttle valve; wherein, the double-acting hydraulic cylinder, through the combined action of the bridge-type one-way valve group, always causes the high-pressure oil in the hydraulic oil chamber on the squeezed side to flow to the accumulator, and the low-pressure oil flows from the oil tank into the hydraulic oil chamber on the other side, so as to improve the working efficiency of the double-acting hydraulic cylinder; the accumulator is connected to the hydraulic motor through a throttle valve, so that the high-pressure oil passes through the throttle valve to drive the hydraulic motor to rotate; the accumulator is connected to the oil tank through an overflow valve, and when the high-pressure energy stored in the accumulator reaches its capacity limit, the excess high-pressure oil will be converted into low-pressure oil through the overflow valve and flow into the oil tank; the hydraulic motor is connected to the oil tank, so that the high-pressure oil drives the hydraulic motor and then becomes low-pressure oil and flows into the oil tank, and then flows back to the double-acting hydraulic cylinder through the bridge-type one-way valve group to form a circulation loop.

[0009] Furthermore, the booster station module includes a booster device, a high-voltage distribution device connected to the booster device, and a high-voltage transmission cable connected to the high-voltage distribution device, which is used for voltage boosting, high-voltage distribution and power transmission in the wind farm. High-voltage transmission can reduce energy loss during power transmission.

[0010] Furthermore, the conductor frame foundation is a truss structure.

[0011] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0012] 1. The present invention combines the wave energy power generation device with the offshore booster station, sharing a set of conductor frame foundation, without the need to build a new support platform, and sharing a set of booster equipment and power transmission equipment with the offshore wind farm, which greatly reduces the construction cost and wave energy power generation cost, and improves the economic benefits of the offshore power farm.

[0013] 2. The present invention sets the wave energy power generation device at the offshore booster station, which serves as a backup power supply for the booster station when the power grid is out of power. The booster station does not need to be specially equipped with a backup power supply. At the same time, the electric energy generated by the wave energy power generation device can be supplied to the relevant power loads of the booster station on site for consumption. The excess electricity is boosted and transmitted to the land power grid through submarine cables, thereby achieving mutual coordination and rational utilization of resources.

[0014] 3. The present invention is designed with a unique wave energy conversion unit, whose floating body modules are symmetrically arranged on two opposite sides of the jacket foundation through connecting rods of different lengths, which can fully capture wave energy and improve wave energy capture efficiency.

[0015] 4. The hydraulic system of the wave energy power generation device of the present invention combines a bridge-type one-way valve group with a double-acting hydraulic cylinder, so that the mechanical energy can be converted into high-pressure energy of the hydraulic oil when the piston rod in the hydraulic cylinder reciprocates in both directions (the high-pressure oil in the hydraulic oil chamber on the squeezed side always flows to the accumulator), greatly improving the working efficiency of the double-acting hydraulic cylinder.

[0016] 5. When severe sea conditions occur, the wave energy power generation device can lift the floating module out of the water by rotating the connecting rod to avoid structural damage in severe sea conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the vertical oscillation wave energy power generation and offshore booster station integrated device of the present invention.

[0018] Figure 2 It is a connection diagram of the floating module, connecting rod and double-acting hydraulic cylinder.

[0019] Figure 3 This is a power generation principle diagram of the wave energy power generation device of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with specific embodiments.

[0021] See also Figures 1 to 3 As shown, the vertical oscillation wave energy power generation and offshore booster station integrated device provided in this embodiment includes a jacket foundation 1, a booster station module, a hydraulic system 7 and a power generation system 8; the jacket foundation 1 is a truss structure, and a double-layer support platform 2 is formed on the top thereof, the booster station module is installed on the first layer, the hydraulic system 7 and the power generation system 8 are installed on the second layer, and the generator 17 of the power generation system 8 is connected to the hydraulic motor 16 of the hydraulic system 7, and is driven by the hydraulic motor 16 to generate electricity, that is, the mechanical energy of the hydraulic motor 16 is converted into electrical energy; the bottom of the jacket foundation 1 is fixed to the seabed by steel pipe piles 3, and the two sides of the jacket foundation 1 are fixed to the seabed by steel pipe piles 3. Two wave energy conversion units are symmetrically installed on the opposite sides, and each wave energy conversion unit includes a plurality of floating modules 9 and connecting rods 10 and double-acting hydraulic cylinders 11 corresponding to the plurality of floating modules 9, that is, one floating module 9 is equipped with a connecting rod 10 and a double-acting hydraulic cylinder 11, and the lengths of all connecting rods 10 are not consistent (which is conducive to the floating module to fully capture wave energy), one end of which is hinged side by side on the same cross brace 13 of the jacket foundation 1 through an articulated bearing 12, and the other end is connected to the floating module 9. Under the action of waves, the floating module 9 performs a vertical swing motion, driving the connecting rod 10 to swing around the articulated bearing 12, and the connecting rod 10 The middle part is connected to the piston rod of the double-acting hydraulic cylinder 11, so that the piston rod can reciprocate with the swing of the connecting rod 10, thereby driving the piston in the hydraulic cylinder to do work, and converting the wave energy captured by the floating module 9 into the high-pressure energy of the hydraulic oil. The process is: the floating module 9 can effectively absorb the wave energy and convert it into the mechanical energy of the connecting rod 10, and further convert the mechanical energy of the connecting rod 10 into the high-pressure energy of the hydraulic oil through the double-acting hydraulic cylinder 11; in addition, when severe sea conditions occur, the floating module 9 can be lifted out of the water by rotating the connecting rod 10 to avoid structural damage in severe sea conditions; the cylinder bodies of all double-acting hydraulic cylinders 11 are tilted and hinged side by side on the same line of the jacket foundation 1 On the cross brace and above the connecting rod 10, the double-acting hydraulic cylinder 11 is connected to the accumulator 15 of the hydraulic system 7 through a high-pressure oil pipe, so that its high-pressure energy is stored in the accumulator 15, that is, the accumulator 15 stores high-pressure oil, and then the accumulator 15 drives the hydraulic motor 16 to rotate; the above-mentioned hydraulic system 7, power generation system 8 and two wave energy conversion units constitute a wave energy power generation device, which can be used as a backup power supply for the booster station when the power grid is out of power. When the power grid is not out of power, it can supply power to the relevant power loads of the booster station, and the excess electricity is boosted by the booster station module and finally transmitted to the land power grid through the submarine cable, thereby improving the economy of wave energy power generation.

[0022] The hydraulic system 7 includes a bridge-type one-way valve group 14, an accumulator 15, a hydraulic motor 16, an oil tank 18, a relief valve 19, and a throttle valve 20; wherein the double-acting hydraulic cylinder 11, through the combined action of the bridge-type one-way valve group 14, always causes the high-pressure oil in the hydraulic oil chamber on the squeezed side to flow to the accumulator 15, and the low-pressure oil flows into the hydraulic oil chamber on the other side from the oil tank 18, thereby greatly improving the working efficiency of the double-acting hydraulic cylinder 11; the accumulator 15 is connected to the hydraulic motor 16 through the throttle valve 20 , so that the high-pressure oil passes through the throttle valve 20 to drive the hydraulic motor 16 to rotate; the accumulator 15 is connected to the oil tank 18 through the relief valve 19. When the high-pressure energy stored in the accumulator 15 reaches its capacity limit, the excess high-pressure oil will be converted into low-pressure oil through the relief valve 19 and flow into the oil tank 18; the hydraulic motor 16 is connected to the oil tank 18, so that the high-pressure oil drives the hydraulic motor 16 and then becomes low-pressure oil and flows into the oil tank 18, and then flows back to the double-acting hydraulic cylinder 11 through the bridge-type one-way valve group 14, forming a circulation loop.

[0023] The boost station module includes a boost device 4, a high-voltage distribution device 5 connected to the boost device 4, and a high-voltage transmission cable 6 connected to the high-voltage distribution device 5, which is used for voltage boosting, high-voltage distribution and power transmission in the wind farm. High-voltage transmission can reduce energy loss during power transmission.

[0024] In summary, the present invention installs the hydraulic system and the power generation system of the wave energy power generation device on the double-layer support platform of the conductor frame foundation, and the main mechanical actuator of the wave energy power generation (i.e., the wave energy conversion unit) is suspended and installed on the cross brace of the conductor frame foundation. The specially designed wave energy conversion unit can fully capture the wave energy and improve the wave energy capture efficiency. The electric energy generated by the wave energy power generation device can be used as a backup power supply for the booster station when the power grid is out of power, without the need to specially configure a backup power supply. At the same time, it can be supplied to the relevant power loads of the booster station for consumption on site. The excess electricity is boosted by the booster station module and then transmitted to the land power grid via a submarine cable. In addition, the entire wave energy power generation device and the booster station module share a set of conductor frame foundations, without the need to build a new support platform, and share a set of boosting equipment and power transmission equipment with the offshore wind farm. While greatly reducing the construction cost and the cost of wave energy power generation, it also improves the economic benefits of wave energy power generation and the entire wind farm, and realizes the rational allocation and utilization of resources, which is worthy of promotion.

[0025] The above-described embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all changes made according to the shape and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vertical oscillation wave energy power generation and offshore booster station integrated device, comprising a jacket foundation (1), a booster station module and a hydraulic system (7) and a power generation system (8); characterized in that: A double-layer support platform (2) is formed on the top of the jacket foundation (1), the booster station module is installed on the first layer, the hydraulic system (7) and the power generation system (8) are installed on the second layer, the generator (17) of the power generation system (8) is connected to the hydraulic motor (16) of the hydraulic system (7), and is driven by the hydraulic motor (16) to generate electricity, that is, the mechanical energy of the hydraulic motor (16) is converted into electrical energy; the bottom of the jacket foundation (1) is fixed to the seabed by steel pipe piles (3), and two wave energy conversion units are symmetrically installed on two opposite sides of the jacket foundation (1), Each wave energy conversion unit comprises a plurality of floating modules (9) and connecting rods (10) and double-acting hydraulic cylinders (11) corresponding to the plurality of floating modules (9) one by one, that is, one floating module (9) is equipped with one connecting rod (10) and one double-acting hydraulic cylinder (11), the lengths of all the connecting rods (10) are not consistent, one end of each connecting rod is hinged side by side to the same cross brace (13) of the jacket foundation (1) through an articulated bearing (12), and the other end is connected to the floating module (9), under the action of waves, the floating module (9) performs a vertical swing motion, driving the connecting rod (10) to rotate around the articulated bearing (12) to rotate. 12) swings, the middle part of the connecting rod (10) is connected to the piston rod of the double-acting hydraulic cylinder (11), so that the piston rod can reciprocate with the swing of the connecting rod (10), thereby driving the piston in the hydraulic cylinder to do work, converting the wave energy captured by the floating module (9) into the high-pressure energy of the hydraulic oil, and in the event of severe sea conditions, the floating module (9) can be lifted out of the water to avoid damage by rotating the connecting rod (10); the cylinder bodies of all double-acting hydraulic cylinders (11) are hinged side by side on the same cross brace of the jacket foundation (1) and are located above the connecting rod (10). 11) is connected to the accumulator (15) of the hydraulic system (7) through a high-pressure oil pipe, so that the high-pressure energy is stored in the accumulator (15), that is, the accumulator (15) stores high-pressure oil, and then the accumulator (15) drives the hydraulic motor (16) to rotate; the hydraulic system (7), the power generation system (8) and the two wave energy conversion units constitute a wave energy power generation device, which can be used as a backup power supply for the booster station when the power grid is cut off, and can supply power to the relevant power loads of the booster station when the power grid is not cut off, and the excess power is boosted by the booster station module and finally transmitted to the land power grid through the submarine cable.

2. A vertical oscillation wave energy power generation and offshore booster station integrated device according to claim 1, characterized in that: The hydraulic system (7) comprises a bridge-type one-way valve group (14), an accumulator (15), a hydraulic motor (16), an oil tank (18), a relief valve (19), and a throttle valve (20); wherein the double-acting hydraulic cylinder (11) operates in conjunction with the bridge-type one-way valve group (14) so ​​that the high-pressure oil in the hydraulic oil chamber on the squeezed side always flows to the accumulator (15), and the low-pressure oil flows from the oil tank (18) into the hydraulic oil chamber on the other side, so as to improve the working efficiency of the double-acting hydraulic cylinder (11); the accumulator (15) is connected to the hydraulic motor (16) via the throttle valve (20). , so that the high-pressure oil passes through the throttle valve (20) to drive the hydraulic motor (16) to rotate; the accumulator (15) is connected to the oil tank (18) through the overflow valve (19). When the high-pressure energy stored in the accumulator (15) reaches its capacity limit, the excess high-pressure oil will be converted into low-pressure oil through the overflow valve (19) and flow into the oil tank (18); the hydraulic motor (16) is connected to the oil tank (18), so that the high-pressure oil drives the hydraulic motor (16) and then becomes low-pressure oil and flows into the oil tank (18), and then flows back to the double-acting hydraulic cylinder (11) through the bridge-type one-way valve group (14), forming a circulation loop.

3. The vertical oscillation wave energy power generation and offshore booster station integrated device according to claim 1, characterized in that: The boost station module comprises a boost device (4), a high-voltage power distribution device (5) connected to the boost device (4), and a high-voltage transmission cable (6) connected to the high-voltage power distribution device (5), and is used for voltage boosting, high-voltage power distribution and power transmission in a wind farm. The high-voltage transmission can reduce energy loss during power transmission.

4. The vertical oscillation wave energy power generation and offshore booster station integrated device according to claim 1, characterized in that: The conductor frame foundation (1) is a truss structure.

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