Hybrid power system and semi-submersible farming platform

Abstract

The utility model discloses a kind of hybrid power system and semi-submersible aquaculture platform, including through green energy conversion DC power supply, through fossil energy conversion AC power supply and DC bus, DC power supply and DC bus between constitute first transmission line, first transmission line is arranged with the first DC-DC rectifier module being connected with DC power supply, first DC-DC rectifier module is connected with DC bus;AC power supply and DC bus between constitute second transmission line, second transmission line is arranged with the AC-DC rectifier module being connected with AC power supply, AC-DC rectifier module is connected with DC bus, DC bus is connected with DC-AC inverter module, DC-AC inverter module is connected with AC distribution board, DC bus in the utility model in different power supply current can be distributed to different load, ensure the efficient use of power, guarantee the stable power supply of load.

Description

Technical Field

[0001] This utility model relates to the field of offshore power systems, specifically a hybrid power system and a semi-submersible aquaculture platform. Background Technology

[0002] Currently, some offshore aquaculture platforms use diesel generators and a small amount of green energy as supplements. However, the utilization rate of green energy is not high, and the exhaust gases emitted after fuel combustion contain carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), and sulfur dioxide (SO2). Furthermore, the AC power converted from fuel power generation and the DC power converted from green energy use separate circuit systems. If they are directly integrated into a single main circuit system, voltage mismatch will place a significant burden on the circuit. Therefore, how to ensure the stable use of AC and DC power within a single circuit system is a problem that needs to be solved. Summary of the Invention

[0003] To address the aforementioned problems, this utility model provides a hybrid power system that enables AC and DC voltages to be identical, allowing them to be combined and used in a single overall circuit system. The specific solution is as follows:

[0004] A hybrid power system includes a DC power supply converted from green energy, an AC power supply converted from fossil fuels, and a DC bus. The DC power supply and the DC bus form a first transmission line, in which a first DC-DC rectifier module connected to the DC power supply is arranged, and the first DC-DC rectifier module is connected to the DC bus. The AC power supply and the DC bus form a second transmission line, in which an AC-DC rectifier module connected to the AC power supply is arranged, and the AC-DC rectifier module is connected to the DC bus. The DC bus is connected to a DC-AC inverter module, and the DC-AC inverter module is connected to an AC distribution board.

[0005] Furthermore, the DC power supply consists of a photovoltaic module and a wind turbine. The photovoltaic module is connected to a first combiner box, and the wind turbine is connected to a second combiner box. The first and second combiner boxes are connected in parallel to the MPPT wind-solar hybrid controller, which is connected to the first DC-DC rectifier module. The AC power supply is a methanol dual-fuel generator set.

[0006] Furthermore, the AC distribution board includes a 380V AC distribution unit and a 220V AC distribution unit. The 380V AC distribution unit is connected to an AC400V / 400V transformer, which is connected to the DC-AC inverter module. The 220V AC distribution unit is connected to an AC400V / 230V transformer, which is connected to the 380V AC distribution unit.

[0007] Furthermore, a first DC-AC inverter module and a second DC-AC inverter module are connected in parallel on the DC bus;

[0008] The 380V AC power distribution unit is equipped with a first AC400V / 400V transformer and a second AC400V / 400V transformer connected in parallel. The first AC400V / 400V transformer is connected to the first DC-AC inverter module, and the second AC400V / 400V transformer is connected to the second DC-AC inverter module.

[0009] The 220V AC power distribution unit is connected in parallel with a first AC400V / 230V transformer and a second AC400V / 230V transformer. The first AC400V / 230V transformer is connected to the first AC400V / 400V transformer, and the second AC400V / 230V transformer is connected to the second AC400V / 230V transformer.

[0010] A first switch is provided on the DC bus between the first DC-AC inverter module and the second DC-AC inverter module.

[0011] The 380V AC power distribution unit is equipped with a second switch located between the first AC400V / 400V transformer and the second AC400V / 400V transformer.

[0012] Furthermore, the DC bus is also connected to the lithium battery pack, and a second DC-DC rectifier module is connected between the lithium battery pack and the DC bus.

[0013] Furthermore, a semi-submersible aquaculture platform is equipped with a hybrid electric system, including a top deck, a D deck, and a C deck located above the water surface, wherein the top deck, the D deck, and the C deck are arranged sequentially above and below each other;

[0014] The top deck is rectangular, and photovoltaic modules and wind turbines are installed on the top deck. The photovoltaic modules are installed on the side of the top deck, and the wind turbines are located at the top corner of the top deck.

[0015] The D deck is located below the top deck, and a methanol dual-fuel generator set is installed on the D deck;

[0016] The C deck is located below the D deck, and lithium battery packs are arranged on the C deck.

[0017] Furthermore, the photovoltaic module has a support frame at its bottom that is fixedly connected to the top deck.

[0018] Furthermore, the D deck is equipped with a generator room, a power distribution room, and a power distribution equipment room;

[0019] The methanol dual-fuel generator set is installed in the generator room;

[0020] The DC bus, AC distribution board, first AC400V / 400V transformer, second AC400V / 400V transformer, first AC400V / 230V transformer and second AC400V / 230V transformer are all arranged in the distribution room;

[0021] The MPPT wind-solar hybrid controller, the first combiner box, and the second combiner box are all located in the power distribution equipment room.

[0022] Compared with the prior art, this utility model has the following advantages:

[0023] 1. In this utility model, the DC bus can distribute different power supply currents to different loads, ensuring efficient use of power and guaranteeing stable power supply to the load.

[0024] 2. The AC power source of this utility model is a methanol dual-fuel generator set, which is more environmentally friendly and efficient than existing diesel generators.

[0025] 3. This utility model, by setting a first switch on the DC bus, realizes that when the first switch is closed, AC power and DC power supply are supplied together, and when the first switch is open, AC power and DC power supply are supplied separately. It has the advantages of flexible control and easy maintenance.

[0026] 4. This utility model provides a second switch on the first AC distribution board, which, in conjunction with the first switch, facilitates troubleshooting of circuit faults.

[0027] 5. This utility model enables the storage or discharge of electricity through a lithium battery pack connected to a DC bus.

[0028] 6. The semi-submersible aquaculture platform of this utility model has the advantages of safety and convenience in marine environments by setting up a top deck and a D deck in an upper and lower position, and installing a hybrid power system on the top deck and D deck. The two are compatible with each other. Attached Figure Description

[0029] Figure 1 This is a circuit diagram of the hybrid power system of this utility model;

[0030] Figure 2 This is a top view of the top deck;

[0031] Figure 3 This is a top view of deck D;

[0032] Figure label:

[0033] 1. Methanol dual-fuel generator set; 2-1. Photovoltaic modules; 2-2 1. Wind turbine generator; 2. AC-DC rectifier module; 3. First combiner box; 4. Second combiner box; 4. MPPT wind-solar hybrid controller; 5. First DC-DC rectifier module; 6. Second DC-DC rectifier module; 7. DC bus; 8. First switch; 9. First DC-AC inverter module; 10. Second DC-AC inverter module; 11. First AC400V / 400V transformer; 12. Second AC400V / 400V transformer; 13. AC400V / 400V transformer; 14. AC distribution board; 14.1 380V AC distribution unit; 14.2 220V AC distribution unit; 15. Second switch; 16. First AC400V / 230V transformer; 17. Second AC400V / 230V transformer; 18. Lithium battery pack; 19. Top deck; 20. D deck; 21. Generator room; 22. Power distribution room; 23. Power distribution equipment room. Detailed Implementation

[0034] The technical solution of the utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the utility model, but not all embodiments.

[0035] Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0036] In the description of the utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to has a specific orientation, or is constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0038] like Figure 1 As shown, a hybrid power system includes a DC power supply converted from green energy, an AC power supply converted from fossil energy, and a DC bus. The DC power supply and the DC bus form a first transmission line, in which a first DC-DC rectifier module connected to the DC power supply is arranged, and the first DC-DC rectifier module is connected to the DC bus. The AC power supply and the DC bus form a second transmission line, in which an AC-DC rectifier module connected to the AC power supply is arranged, and the AC-DC rectifier module is connected to the DC bus. The DC bus is connected to a DC-AC inverter module, and the DC-AC inverter module is connected to an AC distribution board.

[0039] Furthermore, the DC power supply consists of a photovoltaic module and a wind turbine. The photovoltaic module is connected to a first combiner box, and the wind turbine is connected to a second combiner box. The first and second combiner boxes are connected in parallel to the MPPT wind-solar hybrid controller, which is connected to the first DC-DC rectifier module. The AC power supply is a methanol dual-fuel generator set.

[0040] The AC distribution board includes a 380V AC distribution unit and a 220V AC distribution unit. The 380V AC distribution unit is connected to an AC400V / 400V transformer, which is connected to the DC-AC inverter module. The 220V AC distribution unit is connected to an AC400V / 230V transformer, which is connected to the 380V AC distribution unit. Example

[0041] A first DC-AC inverter module and a second DC-AC inverter module are connected in parallel on the DC bus.

[0042] The 380V AC power distribution unit is equipped with a first AC400V / 400V transformer and a second AC400V / 400V transformer connected in parallel. The first AC400V / 400V transformer is connected to the first DC-AC inverter module, and the second AC400V / 400V transformer is connected to the second DC-AC inverter module.

[0043] The 220V AC power distribution unit is connected in parallel with a first AC400V / 230V transformer and a second AC400V / 230V transformer. The first AC400V / 230V transformer is connected to the first AC400V / 400V transformer, and the second AC400V / 230V transformer is connected to the second AC400V / 230V transformer.

[0044] A first switch is provided on the DC bus between the first DC-AC inverter module and the second DC-AC inverter module.

[0045] The 380V AC power distribution unit is equipped with a second switch located between the first AC400V / 400V transformer and the second AC400V / 400V transformer.

[0046] The DC bus is also connected to the lithium battery pack, and a second DC-DC rectifier module is connected between the lithium battery pack and the DC bus. Example

[0047] like Figure 2 and Figure 3 As shown, a semi-submersible aquaculture platform is equipped with a hybrid electric system and includes a top deck, a D deck, and a C deck located above the water surface, which are arranged vertically in sequence.

[0048] The top deck is rectangular, and photovoltaic modules and wind turbines are installed on the top deck. The photovoltaic modules are installed on the side of the top deck, and the wind turbines are arranged at the top corner of the top deck.

[0049] The area of ​​the photovoltaic modules on the top deck is 500m². 2 The photovoltaic modules use 540Wp monocrystalline silicon. A support frame is made of square tubes below the photovoltaic modules, and square tubes are arranged and welded on the support. The square tubes are made of 316L stainless steel to meet the safety requirements for typhoon resistance.

[0050] The wind turbine is an electronically controlled permanent magnet direct-drive wind turbine. The 60kW wind turbine has a starting wind speed of 3.5 m / s, a rated wind speed of 10.5 m / s, a cut-in wind speed of ≤3.5 m / s, and a safe wind speed of 45 m / s. The blades are made of reinforced fiberglass (FRP) and are 8.5 m long, with a rotor diameter of 17.42 m. Based on a comparison with 10m wind speed data at sea level and the size and strength of the platform, it meets the operational requirements of the wind turbine.

[0051] The installed capacity on the top deck is 160kW, including approximately 100kW of photovoltaic capacity and 60kW of wind turbine capacity.

[0052] The D deck is located below the top deck, and a methanol dual-fuel generator set is installed on the D deck;

[0053] The C deck is located below the D deck, and lithium battery packs are arranged on the C deck.

[0054] Furthermore, the D deck is equipped with a generator room, a power distribution room, and a power distribution equipment room;

[0055] The 120kW methanol dual-fuel generator set and its auxiliary equipment are all installed in the generator room.

[0056] The DC bus, AC distribution board, first AC400V / 400V transformer, second AC400V / 400V transformer, first AC400V / 230V transformer and second AC400V / 230V transformer are all arranged in the distribution room;

[0057] The MPPT wind-solar hybrid controller, the first combiner box, and the second combiner box are all located in the power distribution equipment room.

[0058] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A hybrid power system, characterized in that, This includes DC power converted from green energy and power derived from fossil fuels. The system converts an AC power supply to a DC bus. A first transmission line is formed between the DC power supply and the DC bus. A first DC-DC rectifier module connected to the DC power supply is arranged in the first transmission line and connected to the DC bus. A second transmission line is formed between the AC power supply and the DC bus. An AC-DC rectifier module connected to the AC power supply is arranged in the second transmission line and connected to the DC bus. The DC bus is connected to a DC-AC inverter module, which is connected to an AC distribution board. The DC power supply consists of a photovoltaic module and a wind turbine. The photovoltaic module is connected to a first combiner box, and the wind turbine is connected to a second combiner box. The first and second combiner boxes are connected in parallel to an MPPT wind-solar hybrid controller, which is connected to the first DC-DC rectifier module. The AC power supply is a methanol dual-fuel generator set. The DC bus is also connected to the lithium battery pack, and a second DC-DC rectifier module is connected between the lithium battery pack and the DC bus. The AC distribution board includes a 380V AC distribution unit and a 220V AC distribution unit. The 380V AC distribution unit is connected to an AC400V / 400V transformer, which is connected to the DC-AC inverter module. The 220V AC distribution unit is connected to an AC400V / 230V transformer, which is connected to the 380V AC distribution unit. A first DC-AC inverter module and a second DC-AC inverter module are connected in parallel on the DC bus; a first AC400V / 400V transformer and a second AC400V / 400V transformer are connected in parallel on the 380V AC distribution unit, the first AC400V / 400V transformer being connected to the first DC-AC inverter module, and the second AC400V / 400V transformer being connected to the second DC-AC inverter module; a first AC400V / 230V transformer and a second... The AC400V / 230V transformers are connected together, with the first AC400V / 230V transformer connected to the first AC400V / 400V transformer and the second AC400V / 230V transformer connected to the second AC400V / 230V transformer. A first switch is provided on the DC bus between the first DC-AC inverter module and the second DC-AC inverter module. A second switch is provided on the 380V AC distribution unit between the first AC400V / 400V transformer and the second AC400V / 400V transformer.

2. A semi-submersible aquaculture platform, characterized in that, The system is equipped with a hybrid power system according to claim 1, comprising a top deck, a D deck, and a C deck located above the water surface, the top deck, the D deck, and the C deck arranged sequentially vertically; the top deck is rectangular, and photovoltaic modules and wind turbines are installed on the top deck, the photovoltaic modules are installed on the sides of the top deck, and the wind turbines are located at the top corners of the top deck; the D deck is located below the top deck, and a methanol dual-fuel generator set is installed on the D deck; the C deck is located below the D deck, and a lithium battery pack is arranged on the C deck.

3. The semi-submersible aquaculture platform according to claim 2, characterized in that, The photovoltaic module has a support frame at its bottom that is fixedly connected to the top deck.

4. The semi-submersible aquaculture platform according to claim 2, characterized in that, The D deck is equipped with a generator room, a power distribution room, and a power distribution equipment room; the methanol dual-fuel generator set is installed in the generator room; the DC bus, AC distribution board, first AC400V / 400V transformer, second AC400V / 400V transformer, first AC400V / 230V transformer, and second AC400V / 230V transformer are all located in the power distribution room; the MPPT wind-solar hybrid controller, first combiner box, and second combiner box are all located in the power distribution equipment room.

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