CN113969857A - Ocean power station and power generation method - Google Patents
Ocean power station and power generation method Download PDFInfo
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- CN113969857A CN113969857A CN202111260565.XA CN202111260565A CN113969857A CN 113969857 A CN113969857 A CN 113969857A CN 202111260565 A CN202111260565 A CN 202111260565A CN 113969857 A CN113969857 A CN 113969857A
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- water
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- storage body
- drainage
- power generation
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/141—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy with a static energy collector
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
Abstract
The invention discloses a marine power station and a power generation method, wherein the power generation method receives electric energy of an unstable marine power supply, utilizes the unstable electric energy to drain water storage bodies through a drainage structure, realizes the storage of the unstable electric energy, generates power through a water-filling power generation structure when a power grid needs, provides stable electric energy for the power grid, and realizes the conversion from the unstable electric energy to the stable electric energy.
Description
Technical Field
The invention relates to a marine power station and a power generation method, and belongs to the field of comprehensive utilization of renewable energy sources.
Background
Ocean energy mainly comprises offshore wind energy, offshore solar energy, tidal energy, wave energy and the like, a device for generating electricity by the energy is an ocean unstable power supply, the energy cannot be developed on a large scale due to indirect instability, and huge energy exists as the ocean occupying 71 percent of the surface of a sphere, so that the problem that unstable electric energy is converted into stable electric energy is urgently solved at present.
Disclosure of Invention
The invention provides a marine power station and a power generation method, which solve the problems disclosed in the background technology.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a marine power plant comprising a body of water storage and control means;
the water storage body is positioned under the sea and is provided with a water filling power generation structure, a drainage structure and an exhaust and inflation structure;
the water filling power generation structure is used for filling water to the water storage body and generating power by utilizing water filling water flow, and a power transmission end of the water filling power generation structure is externally connected with a power grid;
the drainage structure is used for draining water from the water storage body;
the air exhaust and inflation structure is used for exhausting air during water filling and inflating air during water draining;
the control device is externally connected with an ocean unstable power supply and a power grid dispatching system and controls the water filling power generation structure, the water discharging structure and the air discharging and inflating structure.
The water filling power generation structure comprises a water inlet channel communicated with the water storage body, a first control valve is arranged in the water inlet channel and connected with a control device, and a water outlet end of the water inlet channel is provided with a hydraulic power generation device externally connected with a power grid.
The water outlet end of the water inlet channel is positioned at the top of the inner cavity of the water storage body.
The drainage structure comprises a drainage channel arranged in the water storage body and connected with drainage equipment, the drainage equipment is connected with a control device, and the drainage channel extends out of the water storage body.
The drainage device is positioned at the bottom of the inner cavity of the water storage body.
The exhaust inflation structure comprises an exhaust inflation channel, one end of the exhaust inflation channel is communicated with the water storage body, the other end of the exhaust inflation channel is higher than the sea surface, a second control valve is arranged in the exhaust inflation channel, and the second control valve is connected with the control device.
The end part of the exhaust and inflation channel communicated with the water storage body is positioned at the top of the inner cavity of the water storage body.
A water level detection device connected with the control device is arranged in the water storage body.
Still include reserve stable power supply, controlling means connects reserve stable power supply.
A method of power generation at a marine power plant comprising:
in response to the fact that the power grid has no power supply requirement, receives unstable electric energy and the water level in the water storage body is not smaller than the minimum water level threshold value, the drainage structure is controlled to drain water, and the exhaust inflation structure is controlled to inflate;
and in response to the fact that the power supply requirement of the power grid is received and the water level in the water storage body is not larger than the highest water level threshold value, the water filling power generation structure is controlled to fill water and generate power, and the exhaust gas filling structure is controlled to exhaust gas.
The invention achieves the following beneficial effects: the invention receives the electric energy of the ocean unstable power supply, utilizes the unstable electric energy to drain the water storage body through the drainage structure, realizes the storage of the unstable electric energy, generates electricity through the water-filling power generation structure when the power grid needs, provides stable electric energy for the power grid, and realizes the conversion from the unstable electric energy to the stable electric energy.
Drawings
FIG. 1 is a first schematic configuration of a marine power plant;
FIG. 2 is an arrangement of the inlet and exhaust plenum passages;
FIG. 3 is a second schematic illustration of a marine power plant;
FIG. 4 is a third schematic diagram of a marine power plant;
FIG. 5 is a schematic diagram of a water-filled power generation situation;
fig. 6 is a schematic diagram of a drainage energy storage working condition.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, a marine power plant comprises a body of water 1 and control means 5;
the water storage body 1 is positioned under the sea, and a water filling power generation structure, a drainage structure and an exhaust and inflation structure are arranged on the water storage body 1;
the water filling power generation structure is used for filling water to the water storage body 1 and generating power by utilizing water filling water flow, and a power transmission end of the water filling power generation structure is externally connected with a power grid;
the drainage structure is used for draining water from the water storage body 1;
the air exhaust and inflation structure is used for exhausting air during water filling and inflating air during water draining;
the control device 5 is externally connected with an ocean unstable power supply and a power grid dispatching system and controls the water filling power generation structure, the water discharging structure and the air discharging and inflating structure.
The power station receives electric energy of an ocean unstable power supply, the unstable electric energy supplies power to power station electric equipment, the water storage body 1 is drained through the drainage structure, the unstable electric energy is converted into seawater potential energy equivalently, the unstable electric energy is stored, when the power grid needs (load increase and decrease, peak regulation and frequency modulation), the power generation is carried out through the water filling power generation structure, namely, the potential energy is utilized to generate power, the stable electric energy is provided for the power grid, and the conversion from the unstable electric energy to the stable electric energy is realized.
The water storage body 1 can be a tank body, corrosion resistance metal materials are used for the tank body in consideration of corrosion of seawater, pressure of various extreme conditions in the sea, such as the highest rising water surface, the maximum pressure difference between the inside and the outside when the tank is filled with gas and the like are considered, and the pressure is borne by arranging corresponding structural supports in the tank body. The water storage body 1 can also adopt a seabed closed space, such as a seabed karst cave after sealing treatment.
The volume V of the water storage body 1 and the underwater depth H determine the energy storage size, and the relationship between the volume V and the power P, the efficiency eta and the continuous power generation time t of the power station is as follows: v ═ P × t/(9.81H × η).
Assuming that the power of the power station is 10000Kw, the efficiency of the water turbine is 0.93, and the continuous power generation time is 2 hours (7200s), the volume of the water storage body 1 under different water depths is calculated according to the relational formula, and the specific table 1 is shown.
TABLE 1 volume of different water reservoirs 1
The number of the water-filled power generation structures can be determined according to the requirement of generated energy, and the water-filled power generation structures comprise a water inlet channel 2 and a hydroelectric power generation device 4.
One end of the water inlet channel 2 is communicated with the water storage body 1, the other end of the water inlet channel is communicated with the sea, the water inlet channel 2 is made of metal with good corrosion resistance and is a metal pipe, the metal pipe is vertically fixed at the top of the water storage body 1, namely, the water outlet end of the metal pipe is positioned at the top of an inner cavity of the water storage body 1, and the number of the metal pipe bodies can be determined according to actual conditions.
A first control valve 3 is installed in the water inlet channel 2, and the first control valve 3 is connected with a control device 5, namely the control device 5 controls the first control valve 3, and common butterfly valves, ball valves and the like can be selected.
The hydroelectric generation device 4 is externally connected with a power grid, the hydroelectric generation device 4 is arranged at the water outlet end of the water inlet channel 2, a common water turbine is adopted, the water turbine utilizes water flow to generate stable electricity, and the generated electricity is transmitted to the power grid.
The number of the exhaust and inflation structures is determined according to the number of the water-filled power generation structures, and the water-filled power generation structures are more, so that rapid exhaust is needed, and the corresponding exhaust and inflation structures are more.
The exhaust inflation structure comprises an exhaust inflation channel 6 and a second control valve 7 installed in the exhaust inflation channel 6, the second control valve 7 is connected with the control device 5, namely controlled by the control device 5, a common air valve can be selected, one end of the exhaust inflation channel 6 is higher than the sea surface, the other end of the exhaust inflation channel is communicated with the water storage body 1, and the connection position is specifically located at the top of an inner cavity of the water storage body 1, for example: as shown in figure 2, the top of the water storage body 1 is provided with four water inlet channels 2 and an exhaust inflation channel 6, and the exhaust inflation channel 6 is positioned in the middle of the four water inlet channels 2.
The material of the exhaust/inflation passage 6 may be determined according to the desired length. As shown in fig. 3, if the required length is less than 20m, the exhaust gas charging passage 6 can be made of corrosion-resistant metal, and is a metal pipe, and for prolonging the service life, the periphery of the pipe can be further wrapped with corrosion-resistant materials; if the required length is not less than 20m, the exhaust inflation channel 6 can be a hose, and a floater is fixed on the top of the hose, and the port of the hose is ensured to be higher than the sea surface through the floater, as shown in fig. 4.
The quantity of drainage structures can be decided according to actual conditions, the drainage structures comprise drainage equipment 8 and drainage channels, the drainage equipment 8 adopts a common water pump and is arranged at the bottom of the inner cavity of the water storage body 1 to ensure stable drainage, the drainage equipment 8 is connected with the control device 5 and is controlled by the control device 5, the water delivery end of the drainage equipment 8 is connected with the drainage channels, and the drainage channels extend out of the water storage body 1 and are used for discharging water inside.
Because the water storage body 1 needs to be filled with water and drained with water, a water level detection device 9 is installed in the water storage body 1, a float type water level meter is specifically adopted, when the water level in the water storage body 1 is detected to be lower than a minimum water level threshold value, the drainage is stopped, and when the water level in the water storage body 1 is detected to be higher than a maximum threshold value, the water filling is stopped.
Because the whole power station adopts an unstable power supply, in order to ensure the power supply in an emergency, a standby power supply, such as a sealed storage battery and the like, can be fixed on the water storage body 1 and is connected with the control device 5, so as to supply power to the control device 5 in the emergency; for example: the power generation station is already carried out in the power generation station, the current power grid has power supply needs, but the unstable power supply of the ocean can not provide electric energy, and at the moment, the power is supplied through the standby power supply, and the water-filled power generation structure is started.
The working process of the power station is as follows:
as shown in fig. 5, under the water-filling power generation condition, the first control valve 3 and the second control valve 7 are opened to enable seawater to enter the water storage body 1, the potential energy of the seawater is utilized to generate power through the water turbine, and as the lift is stable and constant and the flow can be adjusted through the first control valve 3, the generated electric energy is stable, the power can be adjusted, and the adjustment of the load of the power grid can be met while the power is supplied to the power grid.
As shown in fig. 6, under the working condition of water drainage and energy storage, water in the water storage body 1 is discharged to the sea through the water pump, air is sucked through the exhaust and air inflation channel 6 to supplement the space of the water storage body 1, and at the moment, unstable electric energy is converted into seawater potential energy, so that the storage of the unstable electric energy is realized.
Based on the same technical scheme, the invention also discloses a power generation method of the marine power station, which comprises the following steps:
1) and in response to the fact that the power grid has no power supply requirement, receives unstable electric energy and the water level in the water storage body 1 is not less than the minimum water level threshold value, the drainage structure is controlled to drain water, and the exhaust inflation structure is controlled to inflate.
Under the condition that the power grid has no power supply demand, when receiving unstable electric energy and the current water level in the water storage body 1 is not less than the minimum water level threshold value, namely, an electric energy storage space still exists, the water pump is controlled to drain water, and the second control valve 7 is opened to inflate until the water level in the water storage body 1 is less than the minimum water level threshold value.
The power generation method can store the supplied unstable points, namely convert the supplied unstable points into seawater potential energy.
2) And in response to the fact that the power supply requirement of the power grid is received and the water level in the water storage body 1 is not larger than the highest water level threshold value, controlling the water filling power generation structure to fill water and generate power, and controlling the exhaust gas filling structure to exhaust.
When the power grid has a power supply demand, if the water level in the water storage body 1 is not more than the highest water level threshold value at the moment, namely electric energy is stored, the first control valve 3 and the second control valve 7 are opened, water is filled into the water storage body 1, power generation is carried out by utilizing potential energy, and stable electric energy is provided for the power grid; the conversion from unstable electric energy to stable electric energy is realized through the water discharging and filling.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A marine power plant comprising a body of water storage and control means;
the water storage body is positioned under the sea and is provided with a water filling power generation structure, a drainage structure and an exhaust and inflation structure;
the water filling power generation structure is used for filling water to the water storage body and generating power by utilizing water filling water flow, and a power transmission end of the water filling power generation structure is externally connected with a power grid;
the drainage structure is used for draining water from the water storage body;
the air exhaust and inflation structure is used for exhausting air during water filling and inflating air during water draining;
the control device is externally connected with an ocean unstable power supply and a power grid dispatching system and controls the water filling power generation structure, the water discharging structure and the air discharging and inflating structure.
2. The marine power plant of claim 1, wherein the water-filled power generation structure comprises a water inlet channel communicated with the water storage body, a first control valve is arranged in the water inlet channel and connected with a control device, and a hydroelectric power generation device externally connected with a power grid is arranged at a water outlet end of the water inlet channel.
3. Marine power plant according to claim 2, characterised in that the outlet end of the inlet channel is located at the top of the inner cavity of the water reservoir.
4. Marine power plant according to claim 1, characterized in that the drainage arrangement comprises a drainage channel arranged in the water reservoir and connected to the drainage device, the drainage device being connected to the control means, the drainage channel extending out of the water reservoir.
5. Marine power plant according to claim 4, characterised in that the drainage means is located at the bottom of the inner chamber of the body of water.
6. The marine power plant of claim 1, wherein the exhaust gas aeration structure comprises an exhaust gas aeration channel, one end of the exhaust gas aeration channel is communicated with the water storage body, the other end of the exhaust gas aeration channel is higher than the sea surface, and a second control valve is arranged in the exhaust gas aeration channel and connected with the control device.
7. Marine power plant according to claim 6, characterised in that the end of the exhaust gas plenum channel communicating with the water reservoir is located at the top of the inner chamber of the water reservoir.
8. Marine power plant according to claim 1, characterised in that the reservoir is provided with water level detection means connected to the control means.
9. Marine power plant according to claim 1, further comprising a back-up regulated power supply, the control means being connected to the back-up regulated power supply.
10. A method of generating power at a marine power plant according to any of claims 1 to 9, comprising:
in response to the fact that the power grid has no power supply requirement, receives unstable electric energy and the water level in the water storage body is not smaller than the minimum water level threshold value, the drainage structure is controlled to drain water, and the exhaust inflation structure is controlled to inflate;
and in response to the fact that the power supply requirement of the power grid is received and the water level in the water storage body is not larger than the highest water level threshold value, the water filling power generation structure is controlled to fill water and generate power, and the exhaust gas filling structure is controlled to exhaust gas.
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| CN202111260565.XA CN113969857A (en) | 2021-10-28 | 2021-10-28 | Ocean power station and power generation method |
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| CN202111260565.XA CN113969857A (en) | 2021-10-28 | 2021-10-28 | Ocean power station and power generation method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202645871U (en) * | 2012-06-06 | 2013-01-02 | 华北电力大学（保定） | Offshore wind generating system with water pumping and energy storing functions |
| CN103410651A (en) * | 2013-08-08 | 2013-11-27 | 华北电力大学（保定） | Sea wind-driven water-pumping energy-storage hydraulic power generation device |
| CN203796478U (en) * | 2014-04-22 | 2014-08-27 | 华北电力大学（保定） | Vertical-axis offshore wind-water energy storage combined power generation system |
| CN107489586A (en) * | 2017-10-19 | 2017-12-19 | 张耀辰 | A kind of pumped-storage power generation device |
| CN110578643A (en) * | 2019-08-26 | 2019-12-17 | 清华大学 | Deep-sea floating type wind power generation and pumped storage combined device and working method |
| CN110854880A (en) * | 2019-11-28 | 2020-02-28 | 华北水利水电大学 | Method for stabilizing wind power generation power fluctuation based on water pumping energy storage power station |
| CN110905711A (en) * | 2019-12-11 | 2020-03-24 | 尚彦 | Automatic control system and automatic control method for water pumping and energy storage |
| CN210622983U (en) * | 2019-09-29 | 2020-05-26 | 中国长江三峡集团有限公司 | Offshore wind power and seawater energy storage cooperative power generation system |
-
2021
- 2021-10-28 CN CN202111260565.XA patent/CN113969857A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202645871U (en) * | 2012-06-06 | 2013-01-02 | 华北电力大学（保定） | Offshore wind generating system with water pumping and energy storing functions |
| CN103410651A (en) * | 2013-08-08 | 2013-11-27 | 华北电力大学（保定） | Sea wind-driven water-pumping energy-storage hydraulic power generation device |
| CN203796478U (en) * | 2014-04-22 | 2014-08-27 | 华北电力大学（保定） | Vertical-axis offshore wind-water energy storage combined power generation system |
| CN107489586A (en) * | 2017-10-19 | 2017-12-19 | 张耀辰 | A kind of pumped-storage power generation device |
| CN110578643A (en) * | 2019-08-26 | 2019-12-17 | 清华大学 | Deep-sea floating type wind power generation and pumped storage combined device and working method |
| CN210622983U (en) * | 2019-09-29 | 2020-05-26 | 中国长江三峡集团有限公司 | Offshore wind power and seawater energy storage cooperative power generation system |
| CN110854880A (en) * | 2019-11-28 | 2020-02-28 | 华北水利水电大学 | Method for stabilizing wind power generation power fluctuation based on water pumping energy storage power station |
| CN110905711A (en) * | 2019-12-11 | 2020-03-24 | 尚彦 | Automatic control system and automatic control method for water pumping and energy storage |
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Application publication date: 20220125 |
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