CN220622064U - Power generation system - Google Patents

Abstract

The application provides a power generation system, specifically includes: the floating type power generation device is floatably arranged in the low-level water body; the floating type power generation device is electrically connected with the booster station, and the booster station is used for storing electric energy generated by the floating type power generation device; the water level of the high water area is higher than that of the low water area; a water flow channel for communicating the low-level water body with the high-level water body; the pumped storage power generation device is arranged in the water flow channel and comprises a pumping device and a power generation device, the pumping device and the power generation device are electrically connected with the booster station, the pumping device is used for conveying water in the low-level water body to the high-level water body, and the power generation device utilizes water flow from the high-level water body to the low-level water body to generate power. By the technical scheme, the problem that the setting of the power generation device in the related technology is easily limited by regions can be effectively solved.

Description

Power generation system

Technical Field

The application relates to the technical field of energy storage, in particular to a power generation system.

Background

With the continuous development of the energy industry, the traditional energy structure is gradually changed into a new energy mode of diversification, cleanliness and low carbonization from thermal power generation. The power generation device in the new energy mode can generate power by using resources such as wind power, illumination and the like.

Because the power generation device for generating power by using new energy has intermittence and volatility, after the power generation device is connected into a power system, peak shaving of the power system becomes a new problem of power grid operation. In order to reasonably utilize energy sources and improve the utilization rate of the energy, an energy storage device is needed to collect and store the excess energy which is not timely consumed in a certain period of time in a certain way, and the excess energy is extracted and used when the energy storage device is in use in a peak, such as electrochemical energy storage, hydrogen energy storage and the like, but the method has higher equipment cost and later operation and maintenance cost, larger energy loss in the energy storage and energy release processes, lower energy conversion rate of the whole energy storage system and is not applicable to the energy storage system of a multi-energy complementary project. The pumped storage device is used for pumping water to an upper position by utilizing electric energy in the process of low electricity load, and discharging water to a lower water level in the process of high electricity load peak, has excellent peak regulation and valley filling capacity, and can effectively improve the utilization rate of new energy consumed by a power grid.

However, in the related art, the installation of a power generation device that generates power using new energy is limited by regions, and it is often difficult to fully utilize natural resources.

Disclosure of Invention

The application provides a power generation system for solving the problem that the setting of a power generation device in the related art is limited by regions.

The present application provides a power generation system comprising: the floating type power generation device is floatably arranged in the low-level water body; the floating type power generation device is electrically connected with the booster station, and the booster station is used for storing electric energy generated by the floating type power generation device; the water level of the high water area is higher than that of the low water area; a water flow channel for communicating the low-level water body with the high-level water body; the pumped storage power generation device is arranged in the water flow channel and comprises a pumping device and a power generation device, the pumping device and the power generation device are electrically connected with the booster station, the pumping device is used for conveying water in the low-level water body to the high-level water body, and the power generation device utilizes water flow from the high-level water body to the low-level water body to generate power.

In some embodiments, a floating power generation device includes: the floating type wind power generation device and the floating type photovoltaic power generation device are electrically connected with the booster station.

In some embodiments, a floating wind power generation device includes a first floating platform floatably disposed within a low water body and a wind power generator disposed on the first floating platform, the wind power generator being electrically connected to a booster station.

In some embodiments, the floating power generation device includes a second floating platform floatably disposed within the low water body and a photovoltaic power generation device disposed on the second floating platform, the photovoltaic power generation device being electrically connected to the booster station.

In some embodiments, the water withdrawal device is electrically connected to the grid line.

In some embodiments, the water flow channel includes a water inlet channel and a water outlet channel, the water pumping device is disposed in the water inlet channel, and the power generation device is disposed in the water outlet channel.

In some embodiments, the inlet of the inlet channel is below the level of the lower body of water and the outlet of the inlet channel is above the level of the upper body of water.

In some embodiments, the water inlet of the drain channel is below the level of the elevated water area, and the water outlet of the drain channel is in communication with the water inlet of the water inlet channel.

In some embodiments, the elevated water area is a water reservoir.

In some embodiments, the water pumping device is a water pump turbine and the power generation device is a hydro-generator.

The power generation system provided by the application comprises a low-level water body and a high-level water body, wherein the low-level water body and the high-level water body are communicated through a water flow channel, and the pumped storage power generation device is arranged in the water flow channel. The floating power generation device can be floatably arranged in the low-level water body, the floating power generation device can be used for generating power, the booster station is used for storing the electric energy generated by the floating power generation device, and the booster station can be electrically connected with the power grid line and used for supplying the electric energy generated by the floating power generation device to the power grid line.

The booster station is electrically connected with a pumping device in the pumped storage device, the pumping device can convey water in the low-level water body to the high-level water body by utilizing electric energy stored in the booster station, the electric energy is converted into potential energy of the water, and the electric energy is stored through the height difference between the water level of the high-level water body and the water level of the low-level water body. The power generation device in the pumped storage device can utilize gravitational potential energy of water flow flowing from a high-level water area to a low-level water area to generate power, and the power generation device generates power when the power supply capacity of a power grid line is insufficient. The pumped storage device can convert electric energy into potential energy of water to store when the capacity of the floating power generation device remains, and releases water flow to generate power by utilizing gravitational potential energy of water flow when electricity consumption is high, so as to supplement electric power in a power grid line, and further play a role in balancing electricity consumption peak of the power grid.

In addition, the floating type power generation device is arranged in the low-level water body, so that the space in the low-level water body can be effectively utilized, the horizontal plane of the low-level water body is flat and wide, and the available natural resources are rich. In addition, the floating type power generation device does not occupy land resources on land, the installation and transportation of the equipment are less constrained by geographical conditions, and the floating type power generation device is more beneficial to the installation and the installation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a power generation system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a floating power generation device of a power generation system according to an embodiment of the present application.

Reference numerals illustrate:

10-floating power generation device; 11-floating wind power generation device; 111-a first floating platform; 112-wind power generator; 12-floating photovoltaic power generation device; 121-a second floating platform; 122-a photovoltaic power generation device;

20-low water body;

30-a booster station;

40-high water area;

50-water flow channel;

60-pumping energy storage power generation device; 61-pumping device; 62-a power generation device;

70-grid line.

Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "length," "width," "upper," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and are therefore not to be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In this application, unless explicitly specified and limited otherwise, the terms "mounted," "secured," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, reference to the terms "optionally," "alternative embodiments," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

In the related art, because a power generation device for generating power by using new energy has intermittence and volatility, after the power generation device is connected to a power system, peak shaving of the power system becomes a new difficulty in power grid operation.

In order to reasonably utilize energy sources and improve the utilization rate of the energy, an energy storage device is needed to collect and store the excess energy which is not timely consumed in a certain period of time in a certain way, and the excess energy is extracted and used when the energy storage device is in use in a peak, such as electrochemical energy storage, hydrogen energy storage and the like, but the method has higher equipment cost and later operation and maintenance cost, larger energy loss in the energy storage and energy release processes, lower energy conversion rate of the whole energy storage system and is not applicable to the energy storage system of a multi-energy complementary project.

The pumped storage device is used for pumping water to an upper position by utilizing electric energy in the process of low electricity load, and discharging water to a lower water level in the process of high electricity load peak, has excellent peak regulation and valley filling capacity, and can effectively improve the utilization rate of new energy consumed by a power grid.

At present, the installation of a power generation device for generating power by using new energy is limited by regions, and it is often difficult to fully utilize natural resources.

The application provides a power generation system to solve the problem that the setting of a power generation device in the related art is limited by regions.

Fig. 1 is a schematic structural diagram of a power generation system provided in an embodiment of the present application, and fig. 2 is a schematic structural diagram of a floating power generation device of the power generation system provided in an embodiment of the present application.

As shown in fig. 1 and 2, in the present embodiment, the present application provides a power generation system including: a floating power generation device 10, a booster station 30, a high-level water area 40, a water flow channel 50 and a pumped storage power generation device 60.

Wherein, the floating power generation device 10 is floatably arranged in the low-level water body 20; the booster station 30 is electrically connected with the floating power generation device 10, the booster station 30 is used for storing electric energy generated by the floating power generation device 10, and the booster station 30 is electrically connected with a power grid line; the level of the upper body of water 40 is higher than the level of the lower body of water 20; the water flow channel 50 communicates the low water body 20 with the high water body 40; the pumped storage power generation device 60 is arranged in the water flow channel 50, the pumped storage device comprises a pumping device 61 and a power generation device 62, the pumping device 61 and the power generation device 62 are electrically connected with the booster station 30, the pumping device 61 is used for delivering water in the low-level water body 20 to the high-level water body 40, and the power generation device 62 generates power by utilizing water flowing from the high-level water body 40 to the low-level water body 20.

By applying the technical scheme of the embodiment, the power generation system comprises a low-level water body 20 and a high-level water body 40, wherein the low-level water body 20 and the high-level water body 40 are communicated through a water flow channel 50, and a pumped storage power generation device 60 is arranged in the water flow channel 50. The floating power generation device 10 is floatably disposed in the low-level water body 20, the floating power generation device 10 can be used for generating power, the booster station 30 is used for storing the electric energy generated by the floating power generation device 10, and the booster station 30 can also be electrically connected with the electric grid line 70 for supplying the electric energy generated by the floating power generation device 10 to the electric grid line 70.

The booster station 30 is electrically connected with a pumping device 61 in the pumped storage device, the pumping device 61 can utilize the electric energy stored in the booster station 30 to convey the water in the low-level water body 20 to the high-level water body 40, the electric energy is converted into potential energy of the water, and the electric energy is stored through the height difference between the water level of the high-level water body 40 and the water level of the low-level water body 20. The power generation device 62 in the pumped-hydro energy storage device can generate power by utilizing gravitational potential energy of water flowing from the high-level water area 40 to the low-level water area 20, and can generate power when the power supply capacity of the power grid line is insufficient. The pumped storage device can convert electric energy into potential energy of water to store when the energy produced by the floating power generation device 10 is remained, and releases water flow to generate power by utilizing gravitational potential energy of water flow when electricity consumption is high, so as to supplement electric power in a power grid line, and further play a role in balancing electricity consumption peak of the power grid.

In addition, the floating power generation device 10 of the embodiment is arranged in the low-level water body 20, so that the space in the low-level water body 20 can be effectively utilized, the water level of the low-level water body 20 is flat and wide, and the available natural resources are rich. In addition, the floating power generation device 10 does not occupy land resources on land, and the installation and transportation of the equipment are less constrained by geographical conditions, which is more beneficial to the installation and installation of the floating power generation device 10.

The "water body" is a general term for rivers, lakes, seas, groundwater, glaciers, etc. Is a natural complex of water covered areas. It includes not only water, but also water soluble substances, suspended matters, bottom mud, aquatic organisms and the like. Is an important component of surface water circles, and is a natural water area which takes relatively stable land as a boundary, and comprises rivers, lakes, seas, glaciers, snow, reservoirs, ponds and the like, as well as groundwater and water vapor in the atmosphere. "Water area" refers to rivers, lakes, canals, channels, reservoirs, ponds, their management areas and hydraulic facilities, excluding sea areas and ponds excavated in arable land.

In this embodiment, the low-level water body 20 may be a water body such as a river, a lake, a sea, etc. which is naturally formed, and the high-level water body 40 may be a reservoir, a pond, etc. which is constructed manually. The water body structure formed naturally is used as a low-level water body, and compared with a water storage and energy storage structure constructed manually, the construction cost of the water storage and energy storage structure can be greatly reduced, and the water storage and energy storage structure has the advantages of being rich in resources, low in cost and the like.

Preferably, the low water body 20 of the present embodiment is sea water and the high water body 40 is a reservoir. Sea water is used as the low-level water body 20, so that ocean resources can be fully utilized, and fresh water resources can be saved.

In other embodiments, the floating power generation device 10 may be disposed in the high-level water area 40, or the floating power generation device 10 may be disposed in both the low-level water area 20 and the high-level water area.

The water flow passage 50 may be a metal pipe obtained by purchase, or may be a building through which water flows by construction.

As shown in fig. 1 and 2, in the present embodiment, the floating type power generation device 10 includes a floating type wind power generation device 11 and a floating type photovoltaic power generation device 12, and both the floating type wind power generation device 11 and the floating type photovoltaic power generation device 12 are electrically connected to the booster station 30.

The floating type wind power generation device 11 can generate electricity by utilizing wind power resources, the floating type photovoltaic power generation device 12 can generate electricity by utilizing illumination, and cleanliness of the electricity generation process is guaranteed.

Meanwhile, compared with a land concentrated and distributed photovoltaic power generation system, the offshore solar energy system has abundant offshore solar energy resources, can fully utilize reflected light of the sea surface, and improves the power generation efficiency.

Specifically, as shown in fig. 1 and 2, in the present embodiment, the floating wind power generation device 11 includes a first floating platform 111 floatably provided in the low-level water body 20, and a wind power generator 112 provided on the first floating platform 111, the wind power generator 112 being electrically connected to the booster station 30.

As shown in fig. 1, in the present embodiment, the floating type photovoltaic power generation device 12 includes a second floating platform 121 floatably provided in the low-level water body 20, and a photovoltaic power generation device 122 provided on the second floating platform 121, the photovoltaic power generation device 122 being electrically connected to the booster station 30.

Specifically, in the present embodiment, the photovoltaic power generation device 122 is a double-sided photovoltaic power generation device, the front side of which generates power by direct illumination of sunlight, and the back side of which can generate power by reflected light of sea level, which contributes to improving power generation efficiency.

It should be noted that, a plurality of photovoltaic power generation devices 122 may be carried on one second floating platform 121.

As shown in fig. 1 and 2, in the present embodiment, the water pumping device 61 is electrically connected to the power grid line.

In the above structure, the water pumping device 61 can also pump water and store energy by utilizing the electric energy in the power grid line when electricity consumption is low, and store energy by utilizing the electric energy which cannot be absorbed in the power grid line in a water potential energy mode, so that the power generation device has better peak regulation and frequency modulation functions, and the stable operation of the power grid is ensured.

In the present embodiment, the water flow passage 50 includes a water intake passage in which the water pumping device 61 is disposed and a water discharge passage in which the power generation device 62 is disposed. In the above structure, the water pumping device 61 and the power generating device 62 are opened, and different channels are adopted for water inlet and water drainage.

Specifically, in this embodiment, the water inlet of the water inlet channel is lower than the water level of the low-level water body 20, which is beneficial to taking water from the low-level water body 20. The water outlet of the water inlet channel is higher than the water level of the high-level water area 40, so that the high-level water area 40 cannot flow backward like the water inlet channel.

Further, in this embodiment, the water inlet of the drain channel is lower than the water level of the upper body of water 40, and the water outlet of the drain channel is in communication with the water inlet of the water inlet channel. A water gate is arranged at the water inlet of the drainage channel, and the water gate controls the opening and closing states of the drainage channel.

In this embodiment, the upper body of water 40 is a reservoir, as shown in fig. 1 and 2. The position of the high-level water area 40 can be selected to be a position close to the coastline and higher than the sea level, and the advantage of the topography is utilized for construction.

As shown in fig. 1 and 2, in the present embodiment, the pumping device 61 is a pump turbine, which has advantages of light weight and low cost compared with an energy storage unit in which a water turbine and a pump are connected in series. The power generation device 62 is a hydro-generator.

The power generation system of the embodiment is an integrated energy storage system integrating an offshore floating type wind power generation device 11, a floating type photovoltaic power generation device 12 and a pumped storage power generation device 60, and relates to the fields of new energy offshore wind power, photovoltaic power generation and seawater pumped storage. The system respectively converts wind energy and solar energy into electric energy through the floating wind power generation device 11 and the floating photovoltaic power generation device 12 in the floating power generation device 10, conveys non-load electric energy through the connection of the booster station 30 and a power grid line, and converts the non-consumed electric energy into water potential energy through the connection of the power grid line 70 and the water pumping device 61. The electric energy of the floating type power generation device is stored through the pumped storage power generation device 60, the water potential energy is converted into electric energy through the height difference between the water storage reservoir and the sea level, peak shaving and surfing of overload electric energy are achieved, and finally stable operation of a power grid is achieved.

In addition, the power generation system integrates wind, light and storage, realizes the co-location of power generation and power storage, has extremely strong power grid peak regulation capacity, greatly reduces the overload operation probability of the power grid, and improves the operation stability of the power grid; meanwhile, the system realizes the cooperative operation of the energy storage module and the wind power and photovoltaic power generation device in the electric energy conversion module, and can store the overload electric quantity while completing wind power and photovoltaic power generation, thereby reducing the energy storage cost of the overload electric quantity and realizing the purpose of maximizing the energy storage benefit.

Meanwhile, the power generation system of the embodiment is characterized in that the floating type wind power generation device 11 and the floating type photovoltaic power generation device 12 are arranged in the seawater body, so that the construction cost of the seawater pumping energy storage device is greatly reduced. In addition, the technology of using sea water as a medium and using sea as a low-level water body has the advantages of being rich in resources, low in cost, capable of saving fresh water resources and the like. Therefore, the energy storage construction cost is reduced on the premise of guaranteeing clean energy storage, the aim of multi-energy complementary energy storage is fulfilled, the stability of the power grid is effectively improved, and the energy storage system has wider application value.

Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (6)

1. A power generation system, comprising:

the floating type power generation device (10) is floatably arranged in a low-level water body (20), and the low-level water body (20) is seawater;

a booster station (30), the floating power generation device (10) being electrically connected to the booster station (30), the booster station (30) being for storing electric energy generated by the floating power generation device (10), and the booster station (30) being electrically connected to a grid line (70); the floating power generation device (10) comprises: a floating wind power generation device (11) and a floating photovoltaic power generation device (12), wherein the floating wind power generation device (11) and the floating photovoltaic power generation device (12) are electrically connected with the booster station (30); the floating wind power generation device (11) comprises a first floating platform (111) which is floatably arranged in the low-level water body (20) and a wind power generator (112) which is arranged on the first floating platform (111), wherein the wind power generator (112) is electrically connected with the booster station (30);

a water flow channel (50) for communicating the low water body (20) with the high water body (40), wherein the water level of the high water body (40) is higher than the water level of the low water body (20); the water flow channel (50) comprises a water inlet channel and a water drainage channel, the water pumping device (61) is arranged in the water inlet channel, and the power generation device (62) is arranged in the water drainage channel; the water inlet of the water inlet channel is lower than the water level of the low-level water body (20), and the water outlet of the water inlet channel is higher than the water level of the high-level water body (40);

pumped storage power generation facility (60) are in rivers passageway (50), pumped storage power generation facility includes pumping device (61) and power generation facility (62), pumping device (61) with power generation facility (62) all with booster station (30) electricity is connected, pumping device (61) are used for with water in low level water (20) is sent to high level waters (40), power generation facility (62) utilize high level waters (40) flow to the rivers electricity generation of low level water (20).

2. The power generation system of claim 1, wherein the floating photovoltaic power generation device (12) comprises a second floating platform (121) floatably disposed within the low-level body of water (20) and a photovoltaic power generation device (122) disposed on the second floating platform (121), the photovoltaic power generation device (122) being electrically connected to the booster station (30).

3. The power generation system according to claim 1, characterized in that the pumping device (61) is electrically connected to a grid line (70).

4. The power generation system of claim 1, wherein the water inlet of the drain channel is below the level of the elevated water area (40), and the water outlet of the drain channel is in communication with the water inlet of the water inlet channel.

5. The power generation system of claim 1, wherein the elevated water area (40) is a reservoir.

6. The power generation system according to any one of claims 1 to 5, wherein the water pumping device (61) is a water pump turbine and the power generation device (62) is a water turbine generator.