阅读说明：本技术 海洋浮力储能系统 (Ocean buoyancy energy storage system ) 是由 张鲁 寇宝泉 黄昌闯 葛庆稳 于 2021-09-06 设计创作，主要内容包括：海洋浮力储能系统,属于储能技术领域。解决了现有浮力储能系统结构复杂,不利于实现大规模储能集群的问题。本发明包括电动机、发电机、第一离合器、第二离合器、浮力球、闭合缆绳、停放轨道、第一绞盘、第二绞盘和抓取装置；在电力富余时,通过闭合缆绳由电动机拖动浮力球从海面平台下降到海底,将富余的电能转化为势能进行存储；在需要发电时,浮力球由海底上浮至海面平台并通过闭合缆绳拖动发电机发电,整个系统结构简单,可将产生的富余电力高效的转化为势能进行存储,能量的转化率高。本发明主要用于储能以及电网调峰调频等,亦可用于远海风电场储能。(Ocean buoyancy energy storage system belongs to energy storage technical field. The problem of current buoyancy energy storage system structure complicated, be unfavorable for realizing extensive energy storage cluster is solved. The invention comprises a motor, a generator, a first clutch, a second clutch, a buoyancy ball, a closing cable, a parking track, a first winch, a second winch and a grabbing device; when the electric power is surplus, the buoyancy ball is dragged by the motor through the closed cable to descend from the sea surface platform to the seabed, and surplus electric energy is converted into potential energy to be stored; when power generation is needed, the buoyancy ball floats to the sea surface platform from the sea bottom and drags the generator to generate power through the closed cable, the whole system is simple in structure, the generated surplus power can be efficiently converted into potential energy to be stored, and the conversion rate of the energy is high. The invention is mainly used for energy storage, peak regulation and frequency modulation of a power grid and the like, and can also be used for energy storage of a high-sea wind power plant.)

1. The ocean buoyancy energy storage system is characterized by comprising a motor (1), a generator (2), a first clutch (3), a second clutch (4), a buoyancy ball (5), a closing cable (6), a parking track (7), a first winch (8), a second winch (9) and a grabbing device;

the closing cable (6) is sleeved between the first winch (8) and the second winch (9) and is in sliding connection relative to the first winch (8) and the second winch (9);

the first winch (8), the motor (1), the generator (2), the first clutch (3) and the second clutch (4) are coaxially arranged on the sea surface platform;

a first output shaft of the first winch (8) is connected with a rotating shaft of the motor (1) through a first clutch (3);

the second output shaft of the first winch (8) is connected with the rotating shaft of the generator (2) through a second clutch (4),

the parking track (7), the second winch (9) and the grabbing device are all arranged on the seabed;

the parking track (7) is a semi-annular track, the inlet end and the outlet end of the parking track (7) have a height difference, the inlet end of the parking track (7) is lower than the outlet end of the parking track (7), and the outlet end of the parking track (7) is provided with a stopping mechanism;

the grabbing device is used for realizing the transfer of the buoyancy ball (5);

a pulley component (5-1) is arranged on the buoyancy ball (5);

an energy storage stage: the blocking mechanism is in a blocking state, a first output shaft of a first winch (8) is kept connected with a rotating shaft of a motor (1) by a first clutch (3), after the first output shaft of the first winch (8) is kept disconnected with the rotating shaft of a generator (2) by a second clutch (4), surplus electric energy output by an external renewable energy power generation unit supplies power to the motor (1), the motor (1) drives a buoyancy ball (5) hung on a closed mooring rope (6) to move from the sea surface to the sea bottom by driving the first winch (8) to rotate until the buoyancy ball moves to a second winch (9), in the process, the surplus electric energy output by the external renewable energy power generation unit is converted into potential energy of the buoyancy ball (5), the buoyancy ball (5) is transferred to a parking track (7) by a grabbing device, a pulley assembly (5-1) is clamped on the parking track (7), the buoyancy ball (5) slides along the parking track (7) due to buoyancy and finally stops at the outlet end of the parking track (7);

a power generation stage: the blocking mechanism is in a non-blocking state, the first output shaft of the first winch (8) is kept disconnected from the rotating shaft of the motor (1) by the first clutch (3), the first output shaft of the first winch (8) is kept connected with the rotating shaft of the generator (2) by the second clutch (4), the buoyancy ball (5) is hung on the closed cable rope (6) through the grabbing device, the buoyancy ball (5) moves from bottom to top under the action of buoyancy, the buoyancy ball (5) drives the closed cable rope (6) to move synchronously, the first winch (8) is driven by the movement of the closed cable rope (6) to drive the rotating shaft of the generator (2) to move, and the generator (2) starts to generate electricity.

2. A marine buoyancy energy storage system according to claim 1, wherein the buoyancy ball (5) is a hollow buoyancy ball.

3. A marine buoyancy energy storage system according to claim 1 or 2, wherein the buoyant spheres (5) are fusiform hollow buoyant spheres.

4. Marine buoyancy energy storage system according to claim 1, wherein the longitudinal cross section of the parking track (7) is I-shaped.

5. Marine buoyancy energy storage system according to claim 4, wherein the pulley assembly (5-1) comprises two pulleys, the two pulleys are oppositely arranged and fixedly connected by a connecting frame;

the longitudinal section of the connecting frame is of a rectangular structure, the bottom edge of the rectangular structure is provided with an opening, and the two pulleys are respectively arranged on two end faces of the opening.

6. The marine buoyancy energy storage system according to claim 1, wherein the external renewable energy power generation unit is a photovoltaic power generation system or a wind power generation system.

7. A marine buoyancy energy storage system according to claim 1, wherein the electrical energy output by the generator (2) is used to power an electrical grid or a wireless charging pile.

8. A marine buoyancy energy storage system according to claim 1, wherein the buoyancy ball (5) is fixedly connected to the closing cable (6) by a hook.

9. A marine buoyancy energy storage system according to claim 1, further comprising a controller for controlling the electric motor (1) and the generator (2).

Technical Field

The invention belongs to the technical field of energy storage.

Background

The development of ocean renewable energy is in a rapid development stage and is bound to become an important component in a sustainable energy structure in the future. In addition to the successful operation of large-scale shallow sea fixed wind power projects, the trend of offshore wind power to develop into deep sea in the future is that europe, the united states and japan already have a large number of built, built and planned floating wind power projects. On land, a large-scale photovoltaic array needs to occupy large land resources, which is often unacceptable in coastal areas with developed economy and dense population, and the problems can be overcome if wide offshore space can be fully utilized, so that the research on the water floating type photovoltaic power generation system is promoted. Compare in land photovoltaic system, it can utilize low temperature water around to prevent solar cell from producing overheated problem to be difficult to produce raise dust and cover the problem, also avoided building and vegetation to shelter from sunshine, thereby keep higher conversion efficiency.

Like onshore renewable energy sources, marine renewable energy sources also have intermittent, stochastic defects, leading to instability of the renewable energy source power. The planning indicates that not only the technical maturity of the marine renewable energy equipment is remarkably improved and the engineering application of the marine renewable energy is promoted, but also the conversion of the marine renewable energy equipment from 'energy power generation' to 'stable power generation' is realized. In addition to more accurate prediction and control of renewable energy generation and power demand loads, energy storage technology is one of the keys to accomplishing this transition from "energy" to "steady". However, in the prior art, a system for storing energy by using ocean buoyancy exists, but the buoyancy energy storage system has a complex structure and is not beneficial to realizing large-scale energy storage clustering, so that the problems need to be solved urgently.

Disclosure of Invention

The invention aims to solve the problems that the existing buoyancy energy storage system is complex in structure and is not beneficial to realizing large-scale energy storage clustering.

The marine buoyancy energy storage system comprises a motor, a generator, a first clutch, a second clutch, a buoyancy ball, a closing cable, a parking track, a first winch, a second winch and a grabbing device;

the closing cable is sleeved between the first winch and the second winch and is in sliding connection relative to the first winch and the second winch;

the first winch, the motor, the generator, the first clutch and the second clutch are all coaxially arranged on the sea surface platform;

a first output shaft of the first winch is connected with a rotating shaft of the motor through a first clutch;

the second output shaft of the first winch is connected with the rotating shaft of the generator through a second clutch,

the parking track, the second winch and the grabbing device are all arranged on the seabed;

the parking track is a semi-annular track, the inlet end and the outlet end of the parking track have a height difference, the inlet end of the parking track is lower than the outlet end of the parking track, and the outlet end of the parking track is provided with a stopping mechanism;

the grabbing device is used for realizing the transfer of the buoyancy ball;

a pulley component is arranged on the buoyancy ball;

an energy storage stage: the blocking mechanism is in a blocking state, the first clutch enables the first output shaft of the first winch to be kept connected with the rotating shaft of the motor, the second clutch enables the first output shaft of the first winch to be kept disconnected with the rotating shaft of the generator, the surplus electric energy output by the external renewable energy power generation unit supplies power to the motor, the motor drives the first winch to rotate to drive the buoyancy ball hung on the closed cable to move from the sea surface to the sea bottom until the buoyancy ball moves to the second winch, in the process, the surplus electric energy output by the external renewable energy power generation unit is converted into potential energy of the buoyancy ball, the buoyancy ball is transferred to the parking track through the grabbing device, the pulley assembly is clamped on the parking track, the buoyancy ball slides along the parking track due to buoyancy, and finally the buoyancy ball stops at the outlet end of the parking track;

a power generation stage: the blocking mechanism is in a non-blocking state, the first clutch enables the first output shaft of the first winch to be disconnected with the rotating shaft of the motor, the second clutch enables the first output shaft of the first winch to be connected with the rotating shaft of the generator, the buoyancy ball is hung on the closed cable through the grabbing device and moves from bottom to top under the action of buoyancy, the buoyancy ball drives the closed cable to move synchronously, and the generator starts to generate electricity as the closed cable drives the first winch to drive the rotating shaft of the generator to move.

Preferably, the buoyant spheres are hollow buoyant spheres.

Preferably, the buoyant spheres are spindle-shaped hollow buoyant spheres.

Preferably, the longitudinal section of the parking track is i-shaped.

Preferably, the pulley assembly comprises two pulleys, the two pulleys are oppositely arranged and fixedly connected through a connecting frame;

the longitudinal section of the connecting frame is of a rectangular structure, the bottom edge of the rectangular structure is provided with an opening, and the two pulleys are respectively arranged on two end faces of the opening.

Preferably, the external renewable energy power generation unit is a photovoltaic power generation system or a wind power generation system.

Preferably, the electric energy output by the generator is used for supplying power to a power grid or a wireless charging pile.

Preferably, the buoyancy ball is fixedly connected with the closing cable through a hook.

Preferably, the marine buoyancy energy storage system further comprises a controller for controlling the motor and the generator.

The invention has the following beneficial effects:

(1) the ocean buoyancy energy storage system is simple in structure, modular design can be achieved, and assembly is facilitated;

(2) the system has low construction cost, convenient maintenance, high energy conversion efficiency and good reliability and stability;

(3) the wireless charging pile configured by the system can charge an unmanned ship, an unmanned submarine or an unmanned aerial vehicle working in deep sea, provides stable guarantee, and promotes the voyage and the working time of the unmanned ship, the unmanned submarine or the unmanned aerial vehicle;

(4) the device is matched with an offshore wind power generation system and an offshore photovoltaic power generation system, can fully utilize renewable energy sources, reduces the phenomena of wind abandonment and light abandonment, and has important significance for meeting energy requirements, improving energy consumption structures, reducing environmental pollution, developing offshore energy sources and the like; meanwhile, the peak regulation and frequency modulation of the power grid can be assisted.

Drawings

FIG. 1 is a schematic illustration of the marine buoyancy energy storage system of the present invention;

fig. 2 is a schematic structural view of the parking track 7;

fig. 3 is a diagram showing the relative positions of the buoyant spheres 5 and the parking track 7.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

First embodiment, the present embodiment is described with reference to fig. 1 to 3, and the marine buoyancy energy storage system according to the present embodiment includes a motor 1, a generator 2, a first clutch 3, a second clutch 4, a buoyancy ball 5, a closing cable 6, a parking track 7, a first winch 8, a second winch 9, and a gripping device;

the closing cable 6 is sleeved between the first winch 8 and the second winch 9 and is connected with the first winch 8 and the second winch 9 in a sliding mode;

the first winch 8, the motor 1, the generator 2, the first clutch 3 and the second clutch 4 are coaxially arranged on the sea surface platform;

a first output shaft of the first winch 8 is connected with a rotating shaft of the motor 1 through the first clutch 3;

the second output shaft of the first winch 8 is connected with the rotating shaft of the generator 2 through the second clutch 4,

the parking track 7, the second winch 9 and the gripping device are all arranged on the seabed;

the parking track 7 is a semi-annular track, the inlet end and the outlet end of the parking track 7 have a height difference, the inlet end of the parking track 7 is lower than the outlet end of the parking track 7, and the outlet end of the parking track 7 is provided with a blocking mechanism;

the grabbing device is used for realizing the transfer of the buoyancy ball 5;

a pulley assembly 5-1 is arranged on the buoyancy ball 5;

an energy storage stage: when the blocking mechanism is in a blocking state, the first clutch 3 keeps the first output shaft of the first winch 8 connected with the rotating shaft of the motor 1, the second clutch 4 keeps the first output shaft of the first winch 8 disconnected with the rotating shaft of the generator 2, the surplus electric energy output by the external renewable energy power generation unit supplies power to the motor 1, the motor 1 drives the buoyancy ball 5 hung on the closed mooring rope 6 to move from the sea surface to the sea bottom by driving the first winch 8 to rotate until the buoyancy ball moves to the second winch 9, the surplus electric energy output by the external renewable energy power generation unit is converted into potential energy of the buoyancy ball 5, the buoyancy ball 5 is transferred to the parking track 7 through the gripping device, the pulley assembly 5-1 is clamped on the parking track 7, the buoyancy ball 5 slides along the parking track 7 due to buoyancy and finally stops at the outlet end of the parking track 7;

a power generation stage: the blocking mechanism is in a non-blocking state, the first clutch 3 enables the first output shaft of the first winch 8 to be kept disconnected from the rotating shaft of the motor 1, the second clutch 4 enables the first output shaft of the first winch 8 to be kept connected with the rotating shaft of the generator 2, the buoyancy ball 5 is hung on the closed cable 6 through the grabbing device, the buoyancy ball 5 moves from bottom to top under the buoyancy effect, the buoyancy ball 5 drives the closed cable 6 to move synchronously, and the generator 2 starts to generate electricity as the closed cable 6 moves to drive the first winch 8 to drive the rotating shaft of the generator 2 to move.

In the embodiment, the height difference exists between the inlet end and the outlet end of the parking track 7, so that the buoyancy ball 5 clamped on the parking track 7 slides to the outlet end of the parking track 7 along the inlet end due to the buoyancy effect, and the blocking mechanism limits the buoyancy ball 5 at the outlet end of the parking track 7, so that the mode of automatically moving along the parking track 7 by means of buoyancy does not need to additionally configure a transfer robot;

when the device is used specifically, when the electric power is surplus, the buoyancy ball 5 is dragged by the motor 1 through the closed mooring rope 6 to descend from the sea surface platform to the seabed, and the surplus electric energy is converted into potential energy to be stored; when power generation is needed, the buoyancy ball 5 floats to the sea surface platform from the sea bottom and drags the generator 2 to generate power through the closed cable 6, the whole system is simple in structure, the generated surplus power can be efficiently converted into potential energy to be stored, and the conversion rate of the energy is high.

Further, the buoyancy ball 5 is a hollow buoyancy ball.

Further, the buoyant spheres 5 are spindle-shaped hollow buoyant spheres.

In the preferred embodiment, the buoyancy ball 5 is arranged in a spindle shape, and the structure is beneficial to reducing resistance and improving efficiency when floating upwards and submerging in water.

Furthermore, the longitudinal section of the parking rail 7 is i-shaped.

Furthermore, the pulley assembly 5-1 comprises two pulleys, the two pulleys are oppositely arranged and fixedly connected through a connecting frame;

the longitudinal section of the connecting frame is of a rectangular structure, the bottom edge of the rectangular structure is provided with an opening, and the two pulleys are respectively arranged on two end faces of the opening.

When the pulley assembly 5-1 is used in a specific application, after the rail 7 is parked, the upper cross beam of the I-shaped parking rail 7 is positioned in the cavity of the connecting frame with the rectangular structure, the two pulleys are in sliding connection with the lower surface of the upper cross beam of the I-shaped parking rail 7, and the stability between the pulley assembly 5-1 and the parking rail 7 is good.

Furthermore, the external renewable energy power generation unit is a photovoltaic power generation system or a wind power generation system. Furthermore, the electric energy output by the generator 2 is used for supplying power to a power grid or a wireless charging pile.

Furthermore, the buoyancy ball 5 is fixedly connected with the closing cable 6 through a hook.

Further, the marine buoyancy energy storage system further comprises a controller for controlling the electric motor 1 and the generator 2.

In the preferred embodiment, the controller can control the specific working conditions of the motor 1 and the generator 2.

Principle analysis:

when the electric energy of the power grid is rich, the wind driven generator, the solar panel and the wave energy recovery device are utilized to respectively convert offshore wind energy, solar energy and wave energy into low-price electric energy to drive the motor 1 to work, the first clutch 3 between the motor 1 and the first winch 8 is closed to drive the first winch 8 to work, the fusiform buoyancy ball is dragged to a seabed collection field through the closed cable 6 and stored on an I-shaped annular track (namely a parking track), and the electric energy is converted into potential energy to be stored;

when the electric energy of a power grid is insufficient or the wireless charging pile needs to work, the fusiform buoyancy balls stored on the seabed parking track 7 are controlled to be released in sequence, the fusiform buoyancy balls rise rapidly under the action of buoyancy, the generator 2 is dragged to generate electricity through the closed mooring rope 6 and the second winch 9, and stable electric energy output is provided for the outside. The whole working process is low in loss and high in energy conversion efficiency, is suitable for clustered devices, and is beneficial to large-scale energy storage.

The ocean buoyancy energy storage system is flexible in site selection, simple in structure, convenient to assemble and capable of realizing modular design; the system has low construction cost, convenient maintenance, high energy conversion efficiency and good reliability and stability; the device is matched with an offshore wind power generation system and an offshore photovoltaic power generation system, can fully utilize renewable energy sources, reduces the phenomena of wind abandonment and light abandonment, and can assist power grid peak regulation and frequency modulation.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.