Offshore wind power and hydrogen gas turbine multi-energy complementary comprehensive energy system

Abstract

The utility model relates to the technical field of comprehensive energy, and discloses an offshore wind power and hydrogen gas turbine multi-energy complementary comprehensive energy system which comprises an offshore wind power plant, an offshore converter station, an onshore converter station, an electrolytic bath, an oxygen storage tank, a hydrogen storage tank and a hydrogen gas turbine, and the offshore wind power plant, the offshore converter station and the onshore converter station are sequentially connected; the electrolytic cell is respectively connected with the offshore wind plant, the oxygen storage tank and the hydrogen storage tank; one end of the hydrogen gas turbine is connected with the hydrogen storage tank, and the other end of the hydrogen gas turbine outputs electric energy. When the wind energy is sufficient, electricity is sold to the power grid through the offshore converter station and the land converter station, and wind curtailment is avoided. In the intermittent period of the wind energy, when the output of the wind energy is not reduced enough to cope with the island load peak, the hydrogen gas turbine takes hydrogen in the hydrogen storage tank as fuel to generate electricity according to the mode of'heat by electricity 'and supply the electricity to the island electric load, so that the problem that the wind energy is influenced by the unstable output of the wind energy is solved.

Description

Technical Field

[0001] This utility model relates to the field of integrated energy technology, specifically to an integrated energy system that combines offshore wind power and hydrogen gas turbines. Background Technology

[0002] Against the backdrop of "carbon peaking and carbon neutrality," my country's key infrastructure sectors, such as power and transportation, are accelerating their transformation towards deep low-carbon and clean energy. Furthermore, with the continuous advancement of my country's maritime strategy, more and more marine islands are awaiting development, and maritime traffic is becoming increasingly busy. Offshore energy demand will become a key target for deep decarbonization after carbon peaking. However, currently, my country's marine island energy mainly relies on oil and gas, and maritime transportation also largely uses diesel as fuel. Offshore wind power is currently an important clean energy source, and its installed capacity is increasing year by year, with development extending to mid- and far-sea areas. However, the intermittency and power output fluctuations of wind energy severely restrict its use. Utility Model Content

[0003] In view of this, the present invention provides a multi-energy complementary integrated energy system of offshore wind power and hydrogen gas turbine to solve the problem of clean energy being affected by the fluctuation of wind power output.

[0004] This utility model provides a multi-energy complementary integrated energy system combining offshore wind power and hydrogen gas turbines. The system includes: an offshore wind farm, an offshore converter station, an onshore converter station, an electrolyzer, an oxygen storage tank, a hydrogen storage tank, and a hydrogen gas turbine.

[0005] The offshore wind farm, the offshore converter station, and the onshore converter station are connected in sequence;

[0006] The electrolyzer is connected to the offshore wind farm, the oxygen storage tank, and the hydrogen storage tank, respectively.

[0007] One end of the hydrogen gas turbine is connected to the hydrogen storage tank, and the other end of the hydrogen gas turbine outputs electrical energy.

[0008] In one alternative embodiment, the system further includes an electric boiler, one end of which is connected to the offshore wind farm, and the other end of which is connected to a heating network.

[0009] In one optional embodiment, the system further includes a thermal energy storage device, one end of which is connected to the hydrogen gas turbine, and the other end of which is connected to a heating network.

[0010] In an optional embodiment, the system further includes: a waste heat boiler and a lithium bromide unit, wherein,

[0011] One end of the waste heat boiler is connected to the hydrogen gas turbine, and the other end of the waste heat boiler is connected to one end of the lithium bromide unit, the other end of the lithium bromide unit is connected to the heating network.

[0012] In an alternative embodiment, the lithium bromide unit is also connected to the electrolyzer.

[0013] In one alternative embodiment, the system further includes a fuel cell, one end of which is connected to the hydrogen storage tank, and the other end of which outputs electrical energy.

[0014] This utility model provides a multi-energy complementary integrated energy system combining offshore wind power and hydrogen gas turbines, comprising: an offshore wind farm, an offshore converter station, an onshore converter station, an electrolyzer, an oxygen storage tank, a hydrogen storage tank, and a hydrogen gas turbine. The offshore wind farm, offshore converter station, and onshore converter station are connected sequentially. The electrolyzer is connected to the offshore wind farm, the oxygen storage tank, and the hydrogen storage tank respectively. One end of the hydrogen gas turbine is connected to the hydrogen storage tank, and the other end outputs electrical energy. When wind power is abundant, electricity is sold to the grid through the offshore and onshore converter stations, avoiding wind curtailment. During periods of wind power inactivity, when wind output is insufficient to meet peak loads on islands, the hydrogen gas turbine uses hydrogen from the hydrogen storage tank as fuel to generate electricity according to a "heat-to-electricity" model, supplying the island's electrical load, thus solving the problem of wind power output instability. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of an integrated energy system combining offshore wind power and hydrogen gas turbines according to an embodiment of the present invention.

[0017] Figure label:

[0018] 1—Offshore wind farm; 2—Offshore converter station; 3—Onshore converter station; 4—Electrolyzer; 5—Oxygen storage tank; 6—Hydrogen storage tank; 7—Hydrogen gas turbine; 8—Electric boiler; 9—Thermal energy storage device; 10—Waste heat boiler; 11—Lithium bromide generator unit; 12—Fuel cell. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] This utility model provides a multi-energy complementary integrated energy system combining offshore wind power and hydrogen gas turbines, such as... Figure 1 As shown, the system includes: an offshore wind farm 1, an offshore converter station 2, an onshore converter station 3, an electrolyzer 4, an oxygen storage tank 5, a hydrogen storage tank 6, and a hydrogen gas turbine 7. The offshore wind farm 1, offshore converter station 2, and onshore converter station 3 are connected sequentially. The electrolyzer 4 is connected to the offshore wind farm 1, the oxygen storage tank 5, and the hydrogen storage tank 6. One end of the hydrogen gas turbine 7 is connected to the hydrogen storage tank 6, and the other end of the hydrogen gas turbine 7 outputs electrical energy.

[0024] Specifically, when offshore wind farm 1 experiences wind curtailment or its electricity price falls below a certain threshold, it sells electricity to the grid through offshore converter station 2 and onshore converter station 3. Electrolyzer 4 produces hydrogen and stores it in hydrogen storage tank 6, while the byproduct oxygen is stored in oxygen storage tank 5, which is then sold externally. When the island's load is at its peak or the electricity price is too high, hydrogen gas turbine 7 uses the hydrogen in hydrogen storage tank 6 as fuel to generate electricity according to the "electricity-driven heat" model, supplying the island's electrical load.

[0025] Furthermore, the system is equipped with an offshore converter station 2 and an onshore converter station 3, enabling the system to generate revenue by selling electricity to the onshore power grid and to connect to the grid during emergencies to ensure the safety of critical loads. The system is equipped with an electrolyzer 4, which can start and stop rapidly and has a wide power adjustment range. The generated hydrogen is stored in a hydrogen storage tank 6, using high-pressure gaseous hydrogen storage, and can be directly sold to supply hydrogen loads such as ships. Oxygen is sent to an oxygen storage tank 5, and oxygen is sold to generate revenue. The system is equipped with a hydrogen gas turbine 7 to power the offshore loads.

[0026] This utility model provides a multi-energy complementary integrated energy system combining offshore wind power and hydrogen gas turbines, comprising: an offshore wind farm, an offshore converter station, an onshore converter station, an electrolyzer, an oxygen storage tank, a hydrogen storage tank, and a hydrogen gas turbine. The offshore wind farm, offshore converter station, and onshore converter station are connected sequentially. The electrolyzer is connected to the offshore wind farm, the oxygen storage tank, and the hydrogen storage tank respectively. One end of the hydrogen gas turbine is connected to the hydrogen storage tank, and the other end outputs electrical energy. When wind power is abundant, electricity is sold to the grid through the offshore and onshore converter stations, avoiding wind curtailment. During periods of wind power inactivity, when wind output is insufficient to meet peak loads on islands, the hydrogen gas turbine uses hydrogen from the hydrogen storage tank as fuel to generate electricity according to a "heat-to-electricity" model, supplying the island's electrical load, thus solving the problem of wind power output instability.

[0027] In one alternative implementation, such as Figure 1 As shown, the system also includes an electric boiler 8, one end of which is connected to the offshore wind farm 1, and the other end of which is connected to the heating network.

[0028] Specifically, when there is wind curtailment at offshore wind farm 1 or the electricity price falls below a certain threshold, the hydrogen gas turbine 7 will not operate, and the electric boiler 8 will provide heating, supplying heat to the island through the heating network. The system is equipped with electric boiler 8, which is connected to the heating network and complements the thermal energy storage device 9, thereby improving the safety factor of the heat load.

[0029] In one alternative implementation, such as Figure 1 As shown, the system also includes a thermal energy storage device 9, one end of which is connected to the hydrogen gas turbine 7, and the other end of which is connected to the heating network.

[0030] Specifically, when the island's load is at its peak or electricity prices are too high, the hydrogen gas turbine 7 generates electricity to supply the island's electrical load. When the heat output of the hydrogen gas turbine 7 exceeds the heat load, the thermal energy storage device 9 is activated to store heat. When the heat output of the hydrogen-blended gas turbine 7 is less than the heat load, the thermal energy storage device 9 is activated to release heat or the electric boiler 8 is activated to supplement the heat supply. The system is equipped with the thermal energy storage device 9 to utilize the waste heat generated by the hydrogen gas turbine 7 in a cascade manner, improving energy utilization efficiency and integrating it into the heating network to provide heat load. By configuring the electric boiler 8 and the thermal energy storage device 9, electricity and heat are rationally allocated according to wind curtailment and electricity prices, complementing each other to jointly ensure the safety of the offshore heat load.

[0031] In one alternative implementation, such as Figure 1 As shown, the system also includes a waste heat boiler 10 and a lithium bromide unit 11. One end of the waste heat boiler 10 is connected to the hydrogen gas turbine 7, and the other end of the waste heat boiler 10 is connected to one end of the lithium bromide unit 11. The other end of the lithium bromide unit 11 is connected to the heating network.

[0032] Specifically, the waste heat from the hydrogen gas turbine 7 is supplied to the island for heating and cooling via a heat network through a waste heat boiler 10 and a lithium bromide unit 11. The system is configured with waste heat boiler 10 and lithium bromide unit 11 to utilize the waste heat generated by the hydrogen gas turbine 7 in a cascade manner to provide cooling load.

[0033] In one alternative implementation, such as Figure 1 As shown, the lithium bromide unit 11 is also connected to the electrolyzer 4.

[0034] Specifically, the water vapor generated by the lithium bromide unit 11 is recovered to the electrolyzer 4 to achieve water vapor recovery and utilization.

[0035] In one alternative implementation, such as Figure 1 As shown, the system also includes a fuel cell 12, one end of which is connected to the hydrogen storage tank 6, and the other end of which outputs electrical energy.

[0036] Specifically, fuel cell 12 operates as an energy storage system, rationally distributing hydrogen energy with hydrogen turbine 7 to maximize benefits. Simultaneously, in isolated island operation, it effectively supplements hydrogen turbine 7, jointly ensuring the safety and stability of the offshore load. Fuel cell 12 is a proton exchange membrane fuel cell. The system is equipped with a proton exchange membrane fuel cell to power the offshore load, working with hydrogen turbine 7 to ensure the safety and stability of the offshore load and improve system safety.

[0037] The integrated energy system combining offshore wind power and hydrogen gas turbines enables multi-energy operation modes to adapt to changes in hydrogen supply, power supply, and energy supply methods and requirements. The multi-energy grid connection mode includes both a hydrogen energy system and a power transmission system, balancing local utilization and external transmission of offshore wind power. Priority is given to supplying power to offshore loads, with surplus wind power used for hydrogen production. In this mode, supplying power to offshore loads has the highest priority; hydrogen production is prioritized during off-peak and normal electricity price periods, while power supply to the grid is prioritized during peak electricity price periods. The multi-energy island mode is primarily designed for extreme situations, such as when offshore wind farms are too far from shore, have high hydrogen demand, or face emergencies like war. In this mode, the power transmission and distribution system is completely shut down, and offshore wind power is supplied to offshore loads via the hydrogen energy system.

[0038] This embodiment provides zero-carbon energy supply of "electricity + hydrogen" to various types of loads onshore and offshore, and consumes the stored gas in the hydrogen storage tank by fuel cells or gas turbines during wind power off-peak periods, achieving 100% clean power supply to offshore loads, which has important practical significance for national carbon emission policies; it overcomes the intermittency problem of offshore wind power, and achieves full utilization of energy by producing hydrogen when wind curtailment occurs and grid electricity prices are below the threshold, thereby improving the level of wind power consumption and offshore energy cleanliness and increasing system revenue.

[0039] The integrated energy system combining offshore wind power and hydrogen gas turbines offers flexible regulation and features both single and dual power supply modes, as well as grid-connected and multi-energy island modes. Even in extreme situations, it retains its island power supply capability. The system also offers diversified profitability, generating revenue through various means, including selling electricity to onshore power grids, directly selling hydrogen and oxygen to external sources, selling electricity to offshore loads, selling hydrogen to hydrogen gas turbines owned by offshore loads, and selling hydrogen for ship propulsion.

[0040] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A multi-energy complementary integrated energy system combining offshore wind power and hydrogen gas turbine, characterized in that, The system includes: an offshore wind farm, an offshore converter station, an onshore converter station, an electrolyzer, an oxygen storage tank, a hydrogen storage tank, and a hydrogen gas turbine, wherein... The offshore wind farm, the offshore converter station, and the onshore converter station are connected in sequence; The electrolyzer is connected to the offshore wind farm, the oxygen storage tank, and the hydrogen storage tank, respectively. One end of the hydrogen gas turbine is connected to the hydrogen storage tank, and the other end of the hydrogen gas turbine outputs electrical energy.

2. The multi-energy complementary integrated energy system of offshore wind power and hydrogen gas turbine as described in claim 1, characterized in that, The system also includes an electric boiler, one end of which is connected to the offshore wind farm, and the other end of which is connected to a heating network.

3. The multi-energy complementary integrated energy system of offshore wind power and hydrogen gas turbine as described in claim 1, characterized in that, The system further includes a thermal energy storage device, one end of which is connected to the hydrogen gas turbine, and the other end of which is connected to the heating network.

4. The multi-energy complementary integrated energy system of offshore wind power and hydrogen gas turbine according to claim 3, characterized in that, The system also includes: a waste heat boiler and a lithium bromide unit, wherein... One end of the waste heat boiler is connected to the hydrogen gas turbine, and the other end of the waste heat boiler is connected to one end of the lithium bromide unit, the other end of the lithium bromide unit is connected to the heating network.

5. The multi-energy complementary integrated energy system of offshore wind power and hydrogen gas turbine according to claim 4, characterized in that, The lithium bromide unit is also connected to the electrolytic cell.

6. The multi-energy complementary integrated energy system of offshore wind power and hydrogen gas turbine according to claim 1, characterized in that, The system also includes a fuel cell, one end of which is connected to the hydrogen storage tank, and the other end of which outputs electrical energy.

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