Offshore wind power and nuclear energy complementary operation system and method

Abstract

This invention proposes an offshore wind power-nuclear power complementary system and its operation method, comprising: an offshore wind farm providing electrical energy to meet load demand; a seawater uranium extraction unit group utilizing surplus electrical energy from the offshore wind farm to extract uranium raw materials from seawater; an offshore floating nuclear power plant generating electricity using the uranium raw materials; and an energy collection and dispatch system that receives wind energy from the offshore wind farm and nuclear energy from the offshore floating nuclear power plant, and determines whether the offshore wind farm has surplus wind energy. This invention combines offshore wind power and a small nuclear power plant, achieving mutual complementarity between wind, electricity, and nuclear energy, improving energy utilization efficiency and the operational flexibility and reliability of renewable energy power technologies.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power technology, and more specifically, to an energy complementarity scheme that combines a small floating nuclear power plant with a large offshore wind farm. Background Technology

[0002] The maturity of wind power technology and the vastness of sea areas have driven the development of offshore wind power. However, renewable energy, represented by wind energy, is accompanied by significant randomness, and the rapid development of offshore wind farms poses a major challenge to the safe and stable operation of the power system. Compared with onshore power generation systems, offshore wind power has advantages such as low inertia and fast adjustment speed, and is expected to play a key role in supplying more power system loads. To achieve large-scale grid connection of offshore wind power, researching multi-energy complementary schemes to improve its operational flexibility is of great practical significance.

[0003] Nuclear power, as a mature and clean power generation technology, is an important means of addressing the shortage of electricity and fossil fuels. With the rapid development of small modular reactor (SMR) technology, large-scale construction of SMR power plants has become possible. Compared to large nuclear power plants, SMR power plants have smaller installed capacities (typically less than 300MW), greater flexibility, reliability, and versatility, thus gaining popularity worldwide. my country has vast development space and enormous potential for offshore wind power; designing SMR power plants as floating vessels on the sea surface can effectively contribute to the development of the marine economy.

[0004] In recent years, the marine economy has driven the rapid development of industrial infrastructure on near-shore islands, and the scale of offshore wind power bases is gradually expanding. The "Action Plan for Carbon Peaking before 2030" points out that it is necessary to adhere to the principle of giving equal importance to land and sea, promote the coordinated and rapid development of wind power, improve the offshore wind power industry chain, and encourage the construction of offshore wind power bases. It also calls for actively promoting demonstration projects of advanced reactor types such as modular small modular reactors and offshore floating reactors, and carrying out demonstrations of comprehensive nuclear energy utilization. It is evident that offshore wind power will receive significant development and promotion in the near future to advance the clean and efficient transformation of my country's energy structure. Researching energy complementarity schemes combining small offshore floating nuclear power plants with large offshore wind farms will become a work of epochal significance. Summary of the Invention

[0005] To address the above-mentioned technical problems, this invention proposes a complementary technology solution for offshore wind power and nuclear power. Specifically, the technical solution of this invention is as follows:

[0006] An offshore wind power and nuclear power complementary system, comprising:

[0007] Offshore wind farms that provide electrical energy to meet the load-side demand;

[0008] A group of seawater uranium extraction devices, which utilize the surplus electrical energy of the offshore wind farm to extract uranium raw materials from seawater;

[0009] A floating nuclear power plant at sea, wherein the floating nuclear power plant at sea uses the uranium raw material to generate electricity;

[0010] An energy collection and dispatch system receives wind energy from the offshore wind farm and nuclear energy from the offshore floating nuclear power plant, and determines whether the offshore wind farm has surplus wind energy.

[0011] Optionally, the offshore uranium extraction facility group extracts uranium raw materials from seawater based on a half-wave rectified alternating current electrochemical method.

[0012] Optionally, the installed capacity of the offshore floating nuclear power plant is no more than 300MW.

[0013] This invention also proposes an operation method for offshore wind power and nuclear power complementarity, comprising the following steps:

[0014] Collect operational data from offshore wind farms;

[0015] Configure an offshore floating nuclear power plant based on the aforementioned operational data;

[0016] Extracting uranium from seawater using excess wind energy from offshore wind farms;

[0017] The floating nuclear power plant at sea will be activated to generate nuclear energy.

[0018] The nuclear energy will be used to supplement offshore wind energy.

[0019] Optionally, it also includes the step of constructing an offshore wind farm operation model based on the operational data.

[0020] Optionally, the construction of the offshore wind farm operation model includes obtaining a data-driven model of the unit power output system using the subspace identification method.

[0021] Optionally, configuring the offshore floating nuclear power plant based on the operating data includes obtaining the remaining wind power or the amount of additional power needed based on the power generation capacity of the offshore wind farm and the electrical energy required by the coastal industrial load. Combined with the rated power of the offshore floating nuclear power plant, the number of offshore floating nuclear power plants that need to be equipped can be obtained.

[0022] Optionally, the extraction of uranium raw materials from seawater is performed using a half-wave rectified alternating current electrochemical method.

[0023] Optionally, the half-wave rectified alternating current electrochemical method includes:

[0024] Applying a bias voltage with a negative amplitude causes positive and negative ions to begin to move in a directional manner under the influence of the applied electric field, forming an electric double layer on the electrode surface;

[0025] The uranyl ions in the inner layer of the electrode combine with the electrode surface;

[0026] Uranium material is further reduced and becomes electrically neutral uranium molecules through electrodeposition.

[0027] When the bias voltage applied by the external pressure is removed, uranyl ions and electrodeposited uranium molecules adhere to the electrode surface, while other ions that do not bind specifically are randomly redistributed on the electrode surface.

[0028] By repeating the above steps, more uranyl ions and uranium molecules adhere to the electrode surface, continuously depositing and gradually increasing the uranium molecule content, which is then extracted.

[0029] Optionally, the electrode is a geminitroxime-functionalized carbon electrode.

[0030] This invention combines offshore wind power and a small nuclear power plant. It utilizes surplus wind energy for uranium extraction from seawater, while nuclear power supplements the load when wind energy is insufficient. This achieves mutual complementarity between wind, electricity, and nuclear energy, improving energy utilization efficiency and the operational flexibility and reliability of renewable energy power technologies. Furthermore, to address the shortcomings of traditional physicochemical adsorption uranium extraction, this invention employs a half-wave rectified alternating current electrochemical (HW-ACE) method to extract uranium from seawater, improving efficiency and uranium purity. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an offshore wind power and nuclear power complementary system according to one embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the operation method of offshore wind power and nuclear power complementarity according to one embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the process for extracting uranium from seawater using the half-wave rectified alternating electrochemical (HW-ACE) method, one embodiment of the present invention. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of this invention / utility model, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] like Figure 1 As shown, this invention proposes an offshore wind-nuclear power complementary system, comprising:

[0037] Offshore wind farms provide electricity to meet the demands of loads. Compared to onshore power generation systems, offshore wind power has advantages such as low inertia and fast adjustment speed, and is expected to play a key role in supplying more power system loads, providing a stable energy supply for coastal loads.

[0038] A seawater uranium extraction device group utilizes surplus electrical energy from an offshore wind farm to extract uranium raw materials from seawater. When the power output of the offshore wind farm exceeds the coastal load requirements, in order to avoid energy waste, the present invention provides the surplus electrical energy to the seawater uranium extraction device group for the extraction of uranium raw materials.

[0039] A floating nuclear power plant at sea, wherein the floating nuclear power plant at sea uses the uranium raw material to generate electricity;

[0040] An energy collection and dispatch system receives wind energy from the offshore wind farm and nuclear energy from the offshore floating nuclear power plant, and determines whether the offshore wind farm has surplus wind energy.

[0041] Optionally, the offshore uranium extraction facility group extracts uranium raw materials from seawater based on a half-wave rectified alternating current electrochemical method.

[0042] Optionally, the installed capacity of the offshore floating nuclear power plant is no more than 300MW.

[0043] Example 2

[0044] like Figure 2-3 As shown, this invention also proposes an operation method for offshore wind power and nuclear power complementarity, comprising the following steps:

[0045] Collect operational data from offshore wind farms; optionally, the method may also include, for example, constructing an operational model of the offshore wind farm based on the operational data.

[0046] This invention considers obtaining a data-driven model of the turbine power output system based on historical operating data of offshore wind farms, for example, through subspace identification methods. MATLAB's subspace identification commands can be used. The model obtained based on different offshore wind farm data will differ.

[0047] Configure offshore floating nuclear power plants based on the aforementioned operating data; optionally, this includes obtaining the remaining or required amount of wind power based on the power generation capacity of offshore wind farms and the electrical energy required by coastal industrial loads, and combining this with the rated power of the offshore floating nuclear power plants to determine the number of offshore floating nuclear power plants required.

[0048] Extracting uranium from seawater using excess wind energy from offshore wind farms;

[0049] The floating nuclear power plant at sea will be activated to generate nuclear energy.

[0050] The nuclear energy will be used to supplement offshore wind energy.

[0051] Optionally, the extraction of uranium from seawater employs a half-wave rectified alternating current electrochemical method. Uranium is a key element in nuclear fuel, and advancing uranium mining technology is crucial for ensuring energy needs and national security. Studies have shown that seawater contains hundreds of times more uranium than land-based uranium; therefore, extracting uranium from seawater to directly supply small-scale floating nuclear power plants is a feasible solution to alleviate uranium resource shortages. Commonly used uranium extraction methods include acid leaching and alkaline leaching, but the extracted uranium carries a high level of impurities. To overcome the shortcomings of traditional physicochemical adsorption, this embodiment employs a half-wave rectified alternating current electrochemical (HW-ACE) method to extract uranium from seawater.

[0052] The HW-AC method uses a metallo-oxime functionalized carbon electrode to bind uranyl ions to its surface, and applies an electric field to force uranium ions, chloride ions, uranium particles, etc. in seawater to migrate in a specific direction, inducing the electrodeposition of uranium compounds to form a charge-neutral substance.

[0053] Seawater uranium extraction process based on HW-ACE; such as Figure 3 As shown, it mainly consists of 5 steps:

[0054] In step 1, all the undesirable adsorbed substances, such as calcium ions, uranium ions, chloride ions, and uranium particles, are randomly distributed in the seawater solution.

[0055] Step 2 involves applying a negative bias voltage (the amplitude alternates between negative and zero for equal duration), causing positive and negative ions to begin directional movement under the influence of the applied electric field, forming an electrical bilayer on the surface of the metallo-oxime functionalized electrode. Uranyl ions in the inner layer of the metallo-oxime electrode can then bind to the electrode surface.

[0056] In step 3, uranium material can be further reduced and electrodeposited into electrically neutral material, such as uranium molecules.

[0057] Step 4: Remove the applied bias voltage, and uranyl ions and electrodeposited uranium molecules adhere to the electrode surface. Other non-specifically bound ions redistribute randomly on the electrode surface.

[0058] Step 5 involves repeating the first four steps in a cycle, resulting in more uranyl ions and uranium molecules adhering to the electrode surface and continuously depositing, gradually increasing the uranium molecule content and allowing it to be extracted.

[0059] This invention combines offshore wind power and a small nuclear power plant. It utilizes surplus wind energy for uranium extraction from seawater, while nuclear power supplements the load when wind energy is insufficient. This achieves mutual complementarity between wind, electricity, and nuclear energy, improving energy utilization efficiency and the operational flexibility and reliability of renewable energy power technologies. Furthermore, to address the shortcomings of traditional physicochemical adsorption uranium extraction, this invention employs a half-wave rectified alternating current electrochemical (HW-ACE) method to extract uranium from seawater, improving efficiency and uranium purity.

[0060] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method for operating a complementary offshore wind and nuclear power system, characterized in that, The method comprises the following steps: collecting operation data of the offshore wind farm; configuring the offshore floating nuclear power station according to the operation data; extracting uranium raw materials from seawater by using the excess wind energy of the offshore wind farm; starting the offshore floating nuclear power station to generate nuclear energy; supplementing the offshore wind energy by using the nuclear energy; and constructing an offshore wind farm operation model according to the operation data. The construction of the offshore wind farm operation model comprises obtaining a data-driven model of a unit power output system by using a subspace identification method. The subspace identification method uses a subspace identification command of MATLAB, and the model obtained based on different offshore wind farm data is different.

2. The method according to claim 1, wherein, The configuration of the offshore floating nuclear power station comprises obtaining the scale of the wind power surplus or the power to be supplemented based on the power generated by the offshore wind farm and the power required by the coastal industrial load, and combining the rated power of the offshore floating nuclear power station to obtain the number of offshore floating nuclear power stations to be configured.

3. The method according to claim 2, wherein, The extraction of the uranium raw materials from seawater adopts a half-wave rectification alternating current electrochemical method. The half-wave rectification alternating current electrochemical method comprises the following steps: applying a bias voltage with a negative amplitude to make positive and negative ions begin to move directionally under the influence of an external electric field and form an electric double layer on the electrode surface; uranium ions in the inner layer of the electrode are combined with the electrode surface; uranium substances are further reduced and become electrically neutral uranium molecules by electrodeposition; the bias voltage applied by the external pressure is cancelled, uranium ions and electrodeposited uranium molecules are attached to the electrode surface, and other ions that do not have specific combination are randomly distributed on the electrode surface again; 4. The method according to claim 3, wherein, the above steps are cyclically executed, more uranium ions and uranium molecules are attached to the electrode surface, and the content of uranium molecules is gradually increased by continuous deposition and then extracted. The electrode is an amidoxime functionalized carbon electrode.

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