阅读说明：本技术 一种海洋波浪能与太阳能组合发电系统 (Ocean wave energy and solar energy combined power generation system ) 是由 张华� 张聪 徐从晓 于 2021-08-30 设计创作，主要内容包括：本发明提供了一种海洋波浪能与太阳能组合发电系统,属于海洋技术领域。本海洋波浪能与太阳能组合发电系统包括设置在海岛周围的波浪能发电组件、架设在海岛上的太阳能发电组件、直流并网模块、储能模块和逆变器模块；波浪能发电组件、太阳能发电组件均和直流并网模块输入端连接,直流并网模块输出端和储能模块连接,储能模块通过逆变器模块连接电网。本海洋波浪能与太阳能组合发电系统实现了海洋环境下的多能互补发电和多元化电能输出,相比单一发电的发电效率更高。(The invention provides a marine wave energy and solar energy combined power generation system, and belongs to the technical field of oceans. The ocean wave energy and solar energy combined power generation system comprises wave energy power generation components arranged around an island, solar power generation components erected on the island, a direct current grid-connected module, an energy storage module and an inverter module; the wave energy power generation assembly and the solar power generation assembly are connected with the input end of the direct current grid-connected module, the output end of the direct current grid-connected module is connected with the energy storage module, and the energy storage module is connected with a power grid through the inverter module. The ocean wave energy and solar energy combined power generation system realizes multi-energy complementary power generation and diversified electric energy output in the ocean environment, and has higher power generation efficiency compared with single power generation.)

1. The ocean wave energy and solar energy combined power generation system is characterized by comprising a wave energy power generation assembly (1), a solar power generation assembly (2), a direct current grid-connected module (3), an energy storage module (4) and an inverter module (5); the wave energy power generation assembly (1) and the solar power generation assembly (2) are connected with the input end of the direct current grid-connected module (3), the output end of the direct current grid-connected module (3) is connected with the energy storage module (4), and the energy storage module (4) is connected with a power grid (19) through an inverter module (5).

2. The combined ocean wave energy and solar power generation system according to claim 1, wherein the wave energy power generation assembly (1) comprises a wave energy collector (6), a transmission assembly (7), a generator (8) and a rectifier (9), the wave energy collector (6) collects wave kinetic energy and transmits the wave kinetic energy to the generator (8) through the transmission assembly (7) to generate power, and the rectifier (9) is used for converting current output by the generator (8) into direct current and merging the direct current into the direct current grid-connected module (3).

3. A combined ocean wave energy and solar power generation system according to claim 1, wherein the solar power generation assembly (2) comprises a photovoltaic panel (13) and a first DC/DC converter (14); the first DC/DC converter (14) is connected to the output end of the photovoltaic panel (13) and is used for converting the electric energy output by the photovoltaic panel (13) into direct current and merging the direct current into the direct current grid-connected module (3).

4. A combined ocean wave energy and solar power generation system according to claim 1, wherein the energy storage module (4) comprises a battery (15) and a second DC/DC converter (16), and the output of the direct current grid-connected module (3) is connected to the battery (15) through the second DC/DC converter (16).

5. A combined ocean wave energy and solar power generation system according to any one of claims 1-4, characterized in that the inverter module (5) comprises a first inverter (17) and a second inverter (18), the battery (15) being connected to the grid (19) via the first inverter (17); the battery (15) is connected to an AC load (20) via a second inverter (18).

6. The combined ocean wave energy and solar power generation system according to claim 5, wherein the battery (15) is one of a lithium battery pack, a lead acid battery pack, and a nickel metal hydride battery pack.

7. A combined ocean wave energy and solar power generation system according to claim 5, characterized in that a booster (21) is provided between the second inverter (18) and the grid (19).

8. A combined ocean wave energy and solar power generation system according to claim 5, wherein the battery (15) is also connected to a direct current load (23) via a third DC/DC converter (22).

Technical Field

The invention belongs to the technical field of ocean rescue, and particularly relates to an ocean wave energy and solar energy combined power generation system.

Background

Wave energy power generation is to generate electric energy by taking wave energy as power, the wave energy is an almost infinite energy resource, and power supply guarantee is brought to industrial and domestic power by utilizing the wave energy power generation, so that great convenience is brought. At present, the common wave energy power generation technology adopts a wave energy collecting mechanism to collect wave energy, converts the energy generated by wave fluctuation into electric energy through an energy conversion mechanism and a generator, directly accesses the generator into a power grid or directly loads a charger, and directly connects the generated electric energy to the power grid or uses the generated electric energy.

However, due to the intermittency and the fluctuation of the wave energy, the quality of the electric energy generated by the generator cannot meet the requirements of direct grid connection and use, and the direct access of the generated electric energy to the power grid can bring adverse effects to the power grid.

Similarly, the solar power generation has uncertainty, if the two power generation mechanisms can be combined and are complementary, the power generation efficiency can be greatly improved, and the trend of multi-energy complementation in the development of new energy in recent years is met.

Disclosure of Invention

In view of this, the present invention provides a combined power generation system of ocean wave energy and solar energy to realize multi-energy complementary power generation in ocean environment.

The purpose of the invention can be realized by the following technical scheme: a sea wave energy and solar energy combined power generation system is characterized by comprising wave energy power generation components arranged around an island, solar power generation components erected on the island, a direct current grid-connected module, an energy storage module and an inverter module; the wave energy power generation assembly and the solar power generation assembly are connected with the input end of the direct current grid-connected module, the output end of the direct current grid-connected module is connected with the energy storage module, and the energy storage module is connected with a power grid through an inverter module.

In the above-mentioned ocean wave energy and solar energy combined power generation system, the wave energy power generation assembly includes a wave energy collector, a transmission assembly, a generator and a rectifier, the wave energy collector collects wave kinetic energy and transmits the wave kinetic energy to the generator through the transmission assembly for power generation, and the rectifier is used for converting current output by the generator into direct current and merging the direct current into a direct current grid-connected module.

In the above combined ocean wave energy and solar power generation system, the solar power generation assembly comprises a photovoltaic panel and a first DC/DC converter; the first DC/DC converter is connected to the output end of the photovoltaic panel and used for converting the electric energy output by the photovoltaic panel into direct current and merging the direct current into the direct current grid-connected module.

In the above combined power generation system of ocean wave energy and solar energy, the energy storage module includes a storage battery and a second DC/DC converter, and the output end of the DC grid-connected module is connected to the storage battery through the second DC/DC converter.

In the above combined power generation system of ocean wave energy and solar energy, the inverter module comprises a first inverter and a second inverter, and the storage battery is connected with the power grid through the first inverter; the storage battery is connected with the alternating current load through the second inverter. The inverter module realizes the diversified functions of the storage battery for supplying power to the alternating current load and transmitting power to the power grid.

In the above ocean wave energy and solar energy combined power generation system, the storage battery is one of a lithium battery pack, a lead-acid battery pack and a nickel-hydrogen battery pack.

In the above-mentioned combined ocean wave energy and solar energy power generation system, a booster is provided between the first inverter and the grid. The voltage of the alternating current converted by the first inverter is boosted by a booster for long-distance delivery.

In the above combined power generation system of ocean wave energy and solar energy, the storage battery is also connected with a third DC/DC converter to a direct current load. The third DC/DC converter regulates the electric energy of the storage battery to convert the electric energy into current usable by the direct current load, so that various direct current loads on the island can directly use the electric energy.

Compared with the prior art, the ocean wave energy and solar energy combined power generation system has the following advantages: the wave energy and the solar energy are converted into the electric energy, and the electric energy is stored in a storage battery pack, so that the effect of developing and utilizing new energy is achieved; the electric energy in the storage battery is merged into the power grid through the inverter, so that a reliable and convenient solution is provided for realizing the power supply of the small power grid in the island region; renewable clean energy is utilized, and the method has important values for realizing diversification of sea island energy, energy conservation and emission reduction and improving competitiveness.

Drawings

Fig. 1 is a system overall architecture diagram of a combined ocean wave energy and solar energy power generation system of the first embodiment.

Fig. 2 is a system overall architecture diagram of the combined ocean wave energy and solar energy power generation system of the second embodiment.

In the figure, 1, a wave energy power generation assembly; 2. a solar power generation module; 3. a direct current grid connection module; 4. an energy storage module; 5. an inverter module; 6. a wave energy collector; 7. a transmission assembly; 8. a generator; 9. a rectifier; 10. a supercharger; 11. a speed regulating valve; 12. a water turbine; 13. a photovoltaic panel; 14. a first DC/DC converter; 15. a storage battery; 16. a second DC/DC converter; 17. a first inverter; 18. a second inverter; 19. a power grid; 20. an alternating current load; 21. a voltage booster; 22. a third DC/DC converter; 23. and (6) a direct current load.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, the ocean wave energy and solar energy combined power generation system comprises a wave energy power generation assembly 1 arranged around an island, a solar power generation assembly 2 erected on the island, a direct current grid-connected module 3, an energy storage module 4 and an inverter module 5; the wave energy power generation assembly 1 and the solar power generation assembly 2 are connected with the input end of the direct current grid-connected module 3, the output end of the direct current grid-connected module 3 is connected with the energy storage module 4, and the energy storage module 4 is connected with the power grid 19 through the inverter module 5.

Specifically, the wave energy power generation assembly 1 comprises a wave energy collector 6, a transmission assembly 7, a generator 8 and a rectifier 9, the wave energy collector 6 collects wave kinetic energy and transmits the wave kinetic energy to the generator 8 through the transmission assembly 7 to generate power, and the rectifier 9 is used for converting current output by the generator 8 into direct current and merging the direct current into the direct current grid-connected module 3. The transmission assembly 7 comprises a supercharger 10, a speed regulating valve 11 and a water turbine 12, mechanical energy output by the wave energy collector 6 is supercharged through the supercharger 10, the water turbine 12 is driven to rotate through the speed regulating valve 11, and the water turbine 12 rotates to drive the generator 8 to generate electricity. It should be noted that the water turbine 12 in the present embodiment may be replaced by a turbine in other embodiments.

The solar power generation module 2 includes a photovoltaic panel 13 and a first DC/DC converter 14; the first DC/DC converter 14 is connected to the output end of the photovoltaic panel 13, and is configured to convert the electric energy output by the photovoltaic panel 13 into direct current and incorporate the direct current into the direct current grid-connected module 3. The photovoltaic panels 13 are a plurality of panels, and are converged by the combiner box and then converted by the first DC/DC converter 14. The photovoltaic panel 13 is mounted on the corresponding support by using a universal joint and is rotated at regular time by using a driving motor, so that the photovoltaic panel 13 can collect light energy to the maximum.

The energy storage module 4 comprises a storage battery 15 and a second DC/DC converter 16, and the output end of the direct current grid-connected module 3 is connected with the storage battery 15 through the second DC/DC converter 16. Specifically, the storage battery 15 is one of a lithium battery pack, a lead-acid battery pack and a nickel-metal hydride battery pack; in a preferred embodiment, the battery 15 is formed of a lithium battery pack.

The inverter module 5 comprises a first inverter 17 and a second inverter 18, the battery 15 being connected to the grid 19 via the first inverter 17; the battery 15 is connected to an ac load 20 via a second inverter 18. The inverter module 5 performs a plurality of functions of supplying power to the ac load 20 and transmitting power to the grid 19 from the battery 15.

Example two:

as shown in fig. 2, a marine rescue system based on the internet of things according to a second embodiment of the present invention is improved based on the system structure of the first embodiment: a booster 21 is provided between the first inverter 17 and the grid 19. The voltage of the alternating current converted by the first inverter 17 is boosted by the booster 21 for long-distance delivery and the loss of electric power is reduced. Further, the battery 15 is connected to a DC load 23 through a third DC/DC converter 22. The electric energy of the storage battery 15 is regulated by the third DC/DC converter 22 to be converted into current usable by the DC loads 23, so that the various DC loads 23 on the island can directly use the electric energy, such as a driving motor for driving the photovoltaic panel 13 to rotate at regular time, a signal lamp on the island, and the like.

The principle of the invention is as follows:

when sunlight exists, the photovoltaic panel 13 arranged on the island converts light energy into electric energy, and then the electric energy is converted by the first DC/DC converter 14 and is transmitted to the direct current grid-connected module 3.

When sea waves exist, wave energy collectors 6 arranged in sea areas around islands collect wave energy, the wave energy is pressurized through a supercharger 10 and then is transmitted to a water turbine 12 under the control of a speed regulating valve 11, the water turbine 12 rotates to drive a generator 8 to generate electricity, the electricity generation process is stable through the control of the speed regulating valve 11, and finally current is rectified through a rectifier 9 and then is transmitted to a direct current grid-connected module 3.

After receiving the electric energy, the DC grid-connected module 3 transmits the electric energy to the second DC/DC converter 16 through an output end thereof for conversion, and then transmits the electric energy to the lithium battery pack of the energy storage module 4 for storage. On the other hand, the electric energy in the battery 15 is output by three ways: the first path is converted by a third DC/DC converter 22 and then transmitted to a direct current load 23; the second path is converted by the first inverter 17 and then transmitted to the power grid 19, the current passing through the first inverter 17 is more stable, and the impact on the power grid 19 is small; the third path is converted by the second inverter 18 and then delivered to the ac load 20.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.