Multi-energy complementary power supply device and control method thereof

Abstract

The invention discloses a multi-energy complementary power supply device and a control method thereof, and relates to the technical field of ship power supply. The device comprises a multi-energy complementary power supply system, a direct-current power distribution system, an alternating-current power distribution system and a variable-current isolation module, the direct-current power distribution system is coupled with the multi-energy complementary power supply system; the direct-current power distribution system converts and isolates electric energy provided by the multi-energy complementary power supply system through a conversion isolation module and then outputs the electric energy to the alternating-current power distribution system; the DC power distribution system is configured to obtain the current operation condition of the large-scale cultivation work ship in the deep and far sea; and determining the operation mode of the multi-energy complementary power supply system and the power supply mode of the large-scale cultivation work ship in the deep and far sea according to the current operation condition of the large-scale cultivation work ship in the deep and far sea. Multiple kinds of energy are provided and supplied to the large-scale cultivation work ship in the deep and far sea in a complementary mode, and the operation mode of the multi-energy complementary power supply system and the power supply mode of the large-scale cultivation work ship in the deep and far sea are reasonably configured according to the real-time operation working condition of the large-scale cultivation work ship in the deep and far sea.

Description

Technical Field

[0001] The present application relates to the technical field of ship power supply, and in particular to a multi-energy complementary power supply device and a control method thereof. Background Art

[0002] With the continuous expansion of the scale of marine development and construction, deep-sea aquaculture has become a new direction for the development of marine aquaculture. Compared with large-scale aquaculture cages, the demand for large-scale aquaculture vessels that are not restricted by geographical regions is also increasing. In addition, in recent years, the requirements for energy conservation and emission reduction of ships have become increasingly higher.

[0003] However, the existing large-scale deep-sea aquaculture vessels have relatively high energy consumption and operating costs, especially under full-cycle operating conditions, and cannot meet the needs of energy conservation and emission reduction. Therefore, it is necessary to develop a power supply solution suitable for large-scale aquaculture vessels. Summary of the invention

[0004] Purpose of the invention: The embodiment of the present application provides a first multi-energy complementary power supply device, aiming to overcome the technical problems of the prior art such as high energy consumption, high cost and inability to meet the needs of energy conservation and emission reduction; another purpose of the embodiment of the present application is to provide a control method for a multi-energy complementary power supply device.

[0005] Technical solution: A multi-energy complementary power supply device according to an embodiment of the present application is applied to large-scale deep-sea aquaculture vessels, and the device comprises: a multi-energy complementary power supply system, a DC power distribution system, an AC power distribution system and a current conversion and isolation module; wherein the DC power distribution system is coupled to the multi-energy complementary power supply system; the DC power distribution system converts and isolates the electric energy provided by the multi-energy complementary power supply system through the current conversion and isolation module and outputs it to the AC power distribution system;

[0006] The DC power distribution system is configured to: obtain the current operating condition of the large-scale deep-sea aquaculture ship; and determine the operating mode of the multi-energy complementary power supply system and the power supply method of the large-scale deep-sea aquaculture ship according to the current operating condition of the large-scale deep-sea aquaculture ship.

[0007] In some embodiments, the current operating condition of the deep-sea large-scale aquaculture vessel includes at least one of: a migration condition, a DP cultural tourism aquaculture condition, a farming condition, a cultural tourism aquaculture condition, a sinking and floating condition, and an emergency condition; the operating mode of the multi-energy complementary power supply system includes at least one of a grid-connected mode and a grid-connected / off-grid mode;

[0008] The DC power distribution system is further configured to: when the current operating condition of the deep-sea large-scale aquaculture vessel is a migration condition or a DP cultural tourism aquaculture condition, control the multi-energy complementary power supply system to operate in the grid-connected mode;

[0009] When the current operating condition of the large deep-sea aquaculture vessel is one of an aquaculture condition, a cultural and tourism aquaculture condition, a sinking and floating condition, and an emergency condition, the multi-energy complementary power supply system is controlled to operate in the on-grid / off-grid mode.

[0010] In some embodiments, the large deep-sea aquaculture vessel comprises at least a first generator set and a second generator set; the DC power distribution system is further configured to: in the grid-connected mode, the first generator set and / or the multi-energy complementary power supply system supplies power to the large deep-sea aquaculture vessel;

[0011] In the on-grid / off-grid mode, the first generator set is controlled to stop running, the second generator set is operated intermittently, and the multi-energy complementary power supply system is operated in the on-grid / off-grid mode, and the second generator set and / or the multi-energy complementary power supply system are used to supply power to the large deep-sea aquaculture vessel.

[0012] In some embodiments, the multi-energy complementary power supply system includes at least a multi-energy power generation system and an energy storage system;

[0013] The DC power distribution system is also configured to: obtain the battery charge state of the energy storage system, and determine the power supply method of the large deep-sea aquaculture vessel in the grid-connected mode according to the battery charge state of the energy storage system.

[0014] In some embodiments, the DC power distribution system is further configured to: in the grid-connected mode, when the battery state of charge of the energy storage system is greater than a first preset threshold, control the multi-energy power generation system to output at full capacity, and control the energy storage system to supply power to the deep-sea large-scale aquaculture vessel;

[0015] When the battery state of charge of the energy storage system is greater than a second preset threshold and less than the first preset threshold, the rated output of the multi-energy power generation system is controlled, and the energy storage system is controlled not to supply power to the deep-sea large-scale aquaculture vessel;

[0016] When the battery state of charge of the energy storage system is greater than a third preset threshold and less than the second preset threshold, controlling the multi-energy power generation system to operate with limited power, and using the remaining electric energy of the multi-energy power generation system to charge the energy storage system;

[0017] When the battery charge state of the energy storage system is less than the third preset threshold, the multi-energy power generation system is controlled to stop supplying power to the large deep-sea aquaculture vessel and to charge the energy storage system.

[0018] In some embodiments, the DC power distribution system is further configured to: obtain the operating status of the second generator set, the load power of the large deep-sea aquaculture ship and the output power of the multi-energy power generation system; and determine the power supply method of the large deep-sea aquaculture ship in the on-grid / off-grid mode according to the operating status of the second generator set, the load power of the large deep-sea aquaculture ship and the output power of the multi-energy power generation system.

[0019] In some embodiments, the DC power distribution system is further configured as:

[0020] In the on-grid / off-grid mode, when the second generator set is not running and the load power of the deep-sea large-scale aquaculture vessel is less than or equal to the output power of the multi-energy power generation system, the multi-energy complementary power supply system is controlled to operate in the off-grid mode and supply power to the deep-sea large-scale aquaculture vessel;

[0021] When the second generator set is running and the load power of the large deep-sea aquaculture ship is greater than the output power of the multi-energy power generation system, the multi-energy complementary power supply system is controlled to operate in the grid-connected mode, and the multi-energy complementary power supply system and the second generator set jointly supply power to the large deep-sea aquaculture ship.

[0022] In some embodiments, the DC power distribution system is further configured as:

[0023] When the second generator set is not running and the multi-energy complementary power supply system is running in an off-grid mode, when the battery charge state of the energy storage system is greater than a first preset threshold, the multi-energy power generation system and the energy storage system are controlled to jointly supply power to the deep-sea large-scale aquaculture vessel;

[0024] When the battery charge state of the energy storage system is greater than a second preset threshold value and less than the first preset threshold value, the multi-energy power generation system is controlled to supply power to the deep-sea large-scale aquaculture vessel, and the surplus power of the multi-energy power generation system is used to charge the energy storage system;

[0025] When the battery charge state of the energy storage system is less than the second preset threshold, the multi-energy power generation system is controlled to no longer supply power to the large deep-sea aquaculture vessel, and the second generator set is controlled to start.

[0026] In some embodiments, the DC power distribution system is further configured to: when the second generator set is running and the multi-energy complementary power supply system is running in grid-connected mode, when the battery charge state of the energy storage system is greater than a third preset threshold, control the rated output of the multi-energy power generation system, and control the multi-energy power generation system and the energy storage system to jointly supply power to the deep-sea large-scale aquaculture vessel;

[0027] When the battery charge state of the energy storage system is less than a third preset threshold, the multi-energy power generation system is controlled to stop supplying power to the large deep-sea aquaculture vessel and charge the energy storage system, and the second generator set is controlled to start.

[0028] In some embodiments, the multi-energy power generation system includes at least one or more of a wind power generation system, a photovoltaic power generation system, a temperature difference power generation system, and a wave power generation system.

[0029] In some embodiments, the DC power distribution system includes at least: an energy management system, a wind turbine control module, a photovoltaic control module, a temperature difference energy control module, a wave energy control module, a bidirectional DC inverter module, and a bidirectional converter module;

[0030] The wind turbine control module, photovoltaic control module, temperature difference energy control module and wave energy control module are all coupled to the energy management system; the energy storage system is coupled to the energy management system through the bidirectional DC inverter module; the bidirectional current conversion module is coupled to the current conversion isolation module;

[0031] Among them, the energy management system is used to obtain the current operating conditions of the large-scale deep-sea aquaculture ship; and determine the operating mode of the multi-energy complementary power supply system and the power supply method of the large-scale deep-sea aquaculture ship according to the current operating conditions of the large-scale deep-sea aquaculture ship.

[0032] In some embodiments, the photovoltaic power generation system includes at least: photovoltaic modules, photovoltaic junction boxes, photovoltaic mounting brackets, flushing devices and laser bird repellent devices; wherein, the photovoltaic power generation system is installed in a flat and open position on the main deck of the large deep-sea aquaculture vessel; and the photovoltaic modules are installed on the main deck in a flat manner.

[0033] In some embodiments, the energy storage system includes at least: a cluster high-voltage box, a high-voltage junction box, a remote repeater board, a battery management system and multiple energy storage units; wherein the energy storage system is installed in the battery compartment of the large deep-sea aquaculture vessel; the battery management system is coupled to the DC distribution system.

[0034] Accordingly, a control method of a multi-energy complementary power supply device according to an embodiment of the present application includes:

[0035] Acquire the current operating condition of the large-scale deep-sea aquaculture vessel; and determine the operating mode of the multi-energy complementary power supply system and the power supply method of the large-scale deep-sea aquaculture vessel according to the current operating condition of the large-scale deep-sea aquaculture vessel.

[0036] Beneficial effect: Compared with the prior art, the multi-energy complementary power supply device and its control method of the embodiment of the present application are applied to large-scale deep-sea aquaculture vessels. The device includes: a multi-energy complementary power supply system, a DC power distribution system, an AC power distribution system and a current conversion isolation module; the DC power distribution system is coupled with the multi-energy complementary power supply system; the DC power distribution system outputs the electric energy provided by the multi-energy complementary power supply system to the AC power distribution system after conversion and isolation through the current conversion isolation module; the DC power distribution system is configured to: obtain the current operating conditions of the deep-sea large-scale aquaculture vessel; and determine the operating mode of the multi-energy complementary power supply system and the power supply mode of the deep-sea large-scale aquaculture vessel according to the current operating conditions of the deep-sea large-scale aquaculture vessel. Through the device, it can be achieved that: by providing multiple energy sources and supplying energy to the deep-sea large-scale aquaculture vessels in a complementary manner, the effective utilization rate of energy can be improved to meet the needs of energy conservation and emission reduction. And the operating conditions of the deep-sea large-scale aquaculture vessels are obtained in real time, and the operating mode of the multi-energy complementary power supply system and the power supply mode of the deep-sea large-scale aquaculture vessels are reasonably configured according to the real-time operating conditions of the deep-sea large-scale aquaculture vessels, so as to meet the operating load of the deep-sea large-scale aquaculture vessels, so that the deep-sea large-scale aquaculture vessels can achieve uninterrupted operation throughout the whole cycle, and further meet the needs of energy conservation and emission reduction, improve energy utilization and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 It is a principle structural block diagram of a multi-energy complementary power supply device provided in an embodiment of the present application;

[0039] Figure 2 It is an architectural topology diagram of a multi-energy complementary power supply system provided in an embodiment of the present application;

[0040] Figure 3 is a control topology diagram of the energy storage system provided in an embodiment of the present application;

[0041] Figure 4 It is a control flow diagram of the multi-energy complementary power supply system in the grid-connected mode provided in the embodiment of the present application;

[0042] Figure 5 It is a control flow diagram of the multi-energy complementary power supply system in the on-grid / off-grid mode provided in the embodiment of the present application;

[0043] Figure 6It is a flow chart of a control method of a multi-energy complementary power supply device provided in an embodiment of the present application.

[0044] Reference numerals:

[0045] 10-Large-scale deep-sea aquaculture vessels; 100-Multi-energy complementary power supply system; 200-DC power distribution system; 300-AC power distribution system; 400-Conversion isolation module; 111-Wind power generation system; 112-Photovoltaic power generation system; 113-Thermoelectric power generation system; 114-Wave power generation system; 210-Wind turbine control module; 220-Photovoltaic control module; 230-Thermoelectric power control module; 240-Wave energy control module; 250-Bidirectional DC inverter module; 260-Bidirectional conversion module. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0047] It should be understood that although the terms first, second, etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another component. Therefore, the first component discussed below can be referred to as the second component without departing from the teachings of the concepts of the present application. As used herein, the term "and / or" includes any one of the associated listed items and all combinations of one or more.

[0048] Those skilled in the art will appreciate that the drawings are only schematic diagrams of example embodiments and may not be to scale. The modules or processes in the drawings are not necessarily required to implement the present application and therefore cannot be used to limit the scope of protection of the present application.

[0049] The applicant has found that with the continuous expansion of the scale of marine development and construction, deep-sea aquaculture has become a new direction for the development of marine aquaculture. Compared with large-scale aquaculture cages, the demand for large-scale aquaculture vessels that are not restricted by geographical constraints has also been increasing. In addition, in recent years, the requirements for energy conservation and emission reduction of ships have also been continuously improved. Both regions and industries have actively promoted the greenhouse gas emission reduction strategy for international shipping. The access of new energy systems to ship power grids can save fuel, reduce emissions, and reduce ship operating costs.

[0050] However, the existing large-scale deep-sea aquaculture vessels have high energy consumption and operating costs, especially in full-cycle operation conditions, and cannot meet the needs of energy conservation and emission reduction. Therefore, it is necessary to develop a power supply solution suitable for large-scale aquaculture vessels.

[0051] To this end, the embodiment of the present application provides a multi-energy complementary power supply device and a control method thereof to improve the effective utilization rate of energy, meet the needs of energy conservation and emission reduction, and solve the technical problems of the existing technology that has high energy consumption, high cost and cannot meet the needs of energy conservation and emission reduction.

[0052] Figure 1 This is a principle structural block diagram of a multi-energy complementary power supply device provided in an embodiment of the present application. Figure 1 The multi-energy complementary power supply device is applied to a large-scale deep-sea aquaculture ship 10. The multi-energy complementary power supply device includes: a multi-energy complementary power supply system 100, a DC distribution system 200, an AC distribution system 300 and a current conversion and isolation module 400; wherein the DC distribution system 200 is coupled with the multi-energy complementary power supply system 100; the DC distribution system 200 outputs the electric energy provided by the multi-energy complementary power supply system 100 to the AC distribution system 300 after conversion and isolation through the current conversion and isolation module 400; the DC distribution system 200 is configured to: obtain the current operating condition of the large-scale deep-sea aquaculture ship 10; and determine the operating mode of the multi-energy complementary power supply system 100 and the power supply method of the large-scale deep-sea aquaculture ship 10 according to the current operating condition of the large-scale deep-sea aquaculture ship 10.

[0053] The multi-energy complementary power supply system 100 is used to provide electric energy in a complementary form using a variety of new energy sources, such as wind energy, solar energy, temperature difference energy, wave energy, etc., and output it to the DC distribution system 200 .

[0054] The AC power distribution system 300 may be arranged in the ship AC power grid of the large deep-sea aquaculture vessel 10 to transmit electric energy to the large deep-sea aquaculture vessel 10 .

[0055] The current conversion isolation module 400 is used to convert the DC power output by the DC power distribution system 200 into AC power and transmit it to the AC power distribution system 300 after isolation. The current conversion isolation module 400 can be an isolation transformer. Exemplarily, the primary side of the isolation transformer is connected to the DC power distribution system 200, and the secondary side is connected to the ship AC power grid to achieve electrical isolation between the multi-energy complementary power supply system 100 and the ship AC power grid, ensure the safety of the multi-energy complementary power supply system, and meet the short circuit and harmonic power calculation requirements of the entire ship power system.

[0056] Exemplarily, the isolation transformer is also provided with a filtering function to ensure the power supply quality of the multi-energy complementary power supply system. Exemplarily, the isolation transformer is also provided with a pre-magnetization function to reduce the impact on the ship's power grid when the multi-energy complementary power supply system is connected to the ship's AC power grid.

[0057] The AC power distribution system 300 is composed of a multi-energy complementary power supply system access switch and an AC power distribution board, and a power station power management system (Power Management System, PMS) is integrated in the AC power distribution system.

[0058] Among them, the multi-energy complementary power supply system is used to provide electricity for large offshore aquaculture vessels by complementing multiple energy sources, making up for the intermittent shortcomings between different forms of new energy power generation, and realizing the uninterrupted operation of the multi-energy complementary power supply system in the full cycle operation conditions of large aquaculture vessels, thereby maximizing energy conservation and emission reduction of ships and improving energy utilization.

[0059] Among them, deep-sea large-scale aquaculture vessels have a variety of operating conditions. Under different conditions, the load requirements of deep-sea large-scale aquaculture vessels are different, and the power supply they require is also different. Therefore, when the deep-sea large-scale aquaculture vessels are in operation, the operating conditions of the deep-sea large-scale aquaculture vessels are obtained in real time, and the operating mode of the multi-energy complementary power supply system and the power supply method of the deep-sea large-scale aquaculture vessels are determined according to the operating conditions, so as to reasonably configure the power supply for the deep-sea large-scale aquaculture vessels, realize the uninterrupted operation of the deep-sea large-scale aquaculture vessels throughout the whole cycle, improve the operating efficiency and power supply reliability of the deep-sea large-scale aquaculture vessels, and realize the energy conservation and emission reduction of the ships to the greatest extent, and improve the energy utilization rate.

[0060] In the technical solution of this embodiment, the implementation process of the multi-energy complementary power supply device is as follows: Figure 1 , the multi-energy complementary power supply system 100 is coupled with the DC distribution system, and the DC distribution system 200 is connected with the AC distribution system 300 through the conversion and isolation module 400. Among them, the multi-energy complementary power supply system 100 provides electric energy to the DC distribution system 200 with various types of new energy in a complementary form, and the DC distribution system 200 receives the electric energy provided by the multi-energy complementary power supply system 100 and converts (DC-AC inversion) and isolates it through the conversion and isolation module 400, and then outputs it to the AC distribution system 300 to provide electric energy for the deep-sea large-scale aquaculture ship 10, thereby meeting the operating load of the deep-sea large-scale aquaculture ship. Therefore, by providing multiple energy sources and supplying energy to the deep-sea large-scale aquaculture ship in a complementary manner, the effective utilization rate of energy can be improved and the needs of energy conservation and emission reduction can be met. And the operating conditions of the large-scale deep-sea aquaculture vessels are obtained in real time, and the operating mode of the multi-energy complementary power supply system 100 and the power supply mode of the large-scale deep-sea aquaculture vessels 10 are reasonably configured according to the real-time operating conditions of the large-scale deep-sea aquaculture vessels, so as to meet the operating load of the large-scale deep-sea aquaculture vessels, so that the large-scale deep-sea aquaculture vessels can achieve uninterrupted operation throughout the whole cycle, improve the efficiency and reliability of the large-scale deep-sea aquaculture vessels, and further meet the needs of energy conservation and emission reduction, improve energy utilization and reduce costs.

[0061] On the basis of the above embodiments, optionally, the current operating condition of the large-scale deep-sea aquaculture ship includes at least one of the following conditions: migration condition, DP cultural tourism aquaculture condition, aquaculture condition, cultural tourism aquaculture condition, sinking and floating condition, and emergency condition; the operating mode of the multi-energy complementary power supply system includes at least one of the grid-connected mode and the grid-connected / off-grid mode; the DC distribution system is also configured as follows: when the current operating condition of the large-scale deep-sea aquaculture ship is the migration condition or the DP cultural tourism aquaculture condition, the multi-energy complementary power supply system is controlled to operate in the grid-connected mode; when the current operating condition of the large-scale deep-sea aquaculture ship is the aquaculture condition, cultural tourism aquaculture condition, sinking and floating condition, and emergency condition, the multi-energy complementary power supply system is controlled to operate in the grid-connected / off-grid mode.

[0062] Among them, deep-sea large-scale aquaculture vessels include a variety of operating conditions. For example, at least the following 6 operating conditions are included, such as migration conditions, DP cultural tourism aquaculture conditions, aquaculture conditions, cultural tourism aquaculture conditions, sinking and floating conditions, and emergency conditions.

[0063] Among them, migration conditions refer to the environment and conditions faced by deep-sea aquaculture vessels during the process of migrating from one location to another. Among them, DP cultural tourism aquaculture conditions refer to the working mode of aquaculture using DP (Deep Pool) technology, which combines the innovative model of cultural tourism and aquaculture. Among them, cultural tourism aquaculture conditions refer to the aquaculture model that combines aquaculture with cultural tourism. Among them, it refers to the different depths and water quality conditions in the water body where animals or fish are located in aquaculture. Among them, sinking and floating conditions refer to the different depths and water quality conditions in the water body where animals or fish are located in aquaculture. Among them, emergency conditions refer to special working conditions faced in emergencies or emergencies. For example, work on ship safety, equipment maintenance, fish protection, etc.

[0064] Among them, the operation mode of the multi-energy complementary power supply system includes one of the grid-connected mode and the grid-connected / off-grid mode. Specifically, the DC distribution system is also configured to: obtain the current operating conditions of the large deep-sea aquaculture ship in real time. If the current operating condition of the large deep-sea aquaculture ship is a migration condition or a DP cultural tourism aquaculture condition, the multi-energy complementary power supply system is controlled to operate in the grid-connected mode, and the power supply mode of the large deep-sea aquaculture ship is controlled in the grid-connected mode, so as to reasonably supply power to the large deep-sea aquaculture ship and meet the needs of energy conservation and emission reduction. If the current operating condition of the large deep-sea aquaculture ship is any one of the aquaculture condition, cultural tourism aquaculture condition, sinking and floating condition and emergency condition, the multi-energy complementary power supply system is controlled to operate in the grid-connected / off-grid mode, and in the grid-connected / off-grid mode, the power supply mode of the large deep-sea aquaculture ship is controlled, so as to reasonably supply power to the large deep-sea aquaculture ship and meet the needs of energy conservation and emission reduction. Therefore, by obtaining the current operating conditions of the large-scale deep-sea aquaculture ship, and controlling the operating mode of the multi-energy complementary power supply system according to the current operating conditions of the large-scale deep-sea aquaculture ship, and controlling the power supply mode of the large-scale deep-sea aquaculture ship, the power supply load of the large-scale deep-sea aquaculture ship can be met while meeting the needs of energy conservation and emission reduction, improving energy utilization, and improving the efficiency and reliability of the large-scale deep-sea aquaculture ship.

[0065] On the basis of the above embodiments, optionally, the large-scale deep-sea aquaculture vessel comprises at least a first generator set and a second generator set; the DC power distribution system is further configured as follows: in grid-connected mode, the first generator set and / or the multi-energy complementary power supply system supplies power to the large-scale deep-sea aquaculture vessel; in grid-connected / off-grid mode, the first generator set is controlled to stop running, the second generator set is operated intermittently, and the multi-energy complementary power supply system is operated in grid-connected / off-grid mode, and the second generator set and / or the multi-energy complementary power supply system supplies power to the large-scale deep-sea aquaculture vessel.

[0066] Specifically, the DC power distribution system is further configured to: obtain the current operating condition of the deep-sea large-scale aquaculture ship in real time. If the current operating condition of the deep-sea large-scale aquaculture ship is a migration condition or a DP cultural tourism aquaculture condition, the multi-energy complementary power supply system is controlled to operate in a grid-connected mode, and in the grid-connected mode, the first generator set and / or the multi-energy complementary power supply system supplies power to the deep-sea large-scale aquaculture ship to meet the operating load and power supply requirements of the deep-sea large-scale aquaculture ship in the migration condition or the DP cultural tourism aquaculture condition, and meet the requirements of energy conservation and emission reduction. If the current operating condition of the large-scale deep-sea aquaculture vessel is any one of the aquaculture condition, cultural and tourism aquaculture condition, sinking and floating condition and emergency condition, the multi-energy complementary power supply system is controlled to operate in on-grid / off-grid mode, and in the on-grid / off-grid mode, the first generator set is controlled to stop running, the second generator set is operated intermittently, and the multi-energy complementary power supply system is operated in on-grid / off-grid mode, and the second generator set and / or the multi-energy complementary power supply system is used to supply power to the large-scale deep-sea aquaculture vessel to meet the operating load and power supply requirements of the large-scale deep-sea aquaculture vessel in any of the aquaculture condition, cultural and tourism aquaculture condition, sinking and floating condition and emergency condition, and meet the requirements of energy conservation and emission reduction. Therefore, by obtaining the current operating conditions of the large-scale deep-sea aquaculture ship, and controlling the operating mode of the multi-energy complementary power supply system according to the current operating conditions of the large-scale deep-sea aquaculture ship, and according to the specific operating modes of the multi-energy complementary power supply system, respectively controlling the power supply mode of the large-scale deep-sea aquaculture ship under the corresponding operating mode, thereby meeting the power supply load of the large-scale deep-sea aquaculture ship while meeting the needs of energy conservation and emission reduction, improving energy utilization, and improving the efficiency and reliability of the large-scale deep-sea aquaculture ship.

[0067] On the basis of the above embodiments, optionally, the multi-energy complementary power supply system 100 includes at least a multi-energy power generation system 110 and an energy storage system 120 .

[0068] Figure 2 is a topological diagram of a multi-energy complementary power supply system provided in an embodiment of the present application. For example, please refer to Figure 2 The multi-energy power generation system 110 includes at least one or more of a wind power generation system 111 , a photovoltaic power generation system 112 , a temperature difference power generation system 113 and a wave power generation system 114 .

[0069] There may be multiple wind power generation systems 111 and multiple photovoltaic power generation systems 112 . The specific number of the systems may be set according to actual conditions and is not specifically limited here.

[0070] Among them, the temperature difference energy power generation system 113 and the wave energy power generation system 114 can be connected according to the actual situation of the deep-sea large-scale aquaculture ship, and can be set according to the actual situation, and no specific limitation is made here. Therefore, a reserved port for the temperature difference energy power generation system 113 and a reserved port for the wave energy power generation system 114 can be set to further save energy and reduce emissions for deep-sea large-scale aquaculture ships and improve the multi-energy complementary power supply system.

[0071] Among them, the wind power generation system consists of a vertical axis wind turbine generator set, a tower, a wind turbine control module (such as a wind turbine controller) and an unloading box. The wind power generation system can be installed in an open position on the main deck of a large deep-sea aquaculture vessel. Among them, the design of the installation base of the vertical axis wind turbine generator set fully considers the roll and pitch of the ship, and should avoid the safe area of ​​the helicopter platform. The vertical axis wind turbine generator set is suitable for large deep-sea aquaculture vessels because of its advantages such as small starting torque, low noise, small size and light weight. During the operation of large deep-sea aquaculture vessels, the vertical axis wind turbine generator set automatically faces the wind in all directions and is suitable for airflows in various directions. The design strength of the vertical axis wind turbine generator set can withstand 12-level wind (36m / s), and is equipped with automatic braking, unloading braking and mechanical braking functions to achieve overspeed safety protection shutdown.

[0072] The wind turbine controller can be set in the DC power distribution system. The vertical axis wind turbine generator set is coupled to the DC power distribution system through the wind turbine controller. The wind turbine controller has a wide input voltage range and can set the power curve. It also has perfect self-detection and protection functions, and stops output when a system failure occurs.

[0073] The photovoltaic power generation system includes at least: photovoltaic modules, photovoltaic junction boxes, photovoltaic mounting brackets, flushing devices and laser bird repellent devices. The main deck of a large deep-sea aquaculture vessel is flat and open, and photovoltaic modules and mounting brackets can be centrally arranged on the flat deck surface between the aquaculture cabins, for example, installed in a flat and open position on the main deck of a large deep-sea aquaculture vessel; photovoltaic modules are installed on the main deck in a flat manner.

[0074] The bottom beam of the photovoltaic module is fixed to the ship deck by bolts or welding (the welding slag needs to be removed and anti-corrosion treatment is performed after welding), the purlin of the photovoltaic module is connected and fixed to the bottom beam of the photovoltaic bracket by M12×30 external hexagonal bolts, and the photovoltaic module is connected and fixed to the purlin by M8×40 internal hexagonal bolts and pressure blocks (including side pressure blocks and middle pressure blocks). The overall strength of the photovoltaic bracket can withstand a wind force of 7 (50km / h).

[0075] The photovoltaic module can be a 550W single crystal double glass photovoltaic module. The photovoltaic power generation system also includes a photovoltaic control module, such as a photovoltaic controller. The photovoltaic controller can be set in a DC power distribution system.

[0076] The photovoltaic power generation system consists of 550W single crystal double-glass photovoltaic modules, photovoltaic junction boxes, photovoltaic controllers and photovoltaic mounting brackets (including purlins), which are installed in a flat and open position on the main deck of a large deep-sea aquaculture vessel. Photovoltaic modules are clustered in series to meet voltage requirements. Multiple clusters are connected in parallel to the photovoltaic junction box and connected to the photovoltaic controller. The photovoltaic controller uses a fully digital intelligent tracking algorithm to quickly obtain the maximum power point of the photovoltaic module to achieve the maximum power output of the photovoltaic module, and integrates safety protection functions such as overcurrent, reverse connection, short circuit, overheating, overload, and DC undervoltage.

[0077] Among them, the mounting bracket design and connecting parts of the photovoltaic modules are subjected to necessary anti-corrosion treatment, and the design strength can withstand wind speeds of no less than 35km / h.

[0078] Among them, photovoltaic modules are laid flat on the upper deck of large deep-sea aquaculture vessels to adapt to or eliminate the impact of different postures of the ship on light during navigation.

[0079] In addition, the photovoltaic power generation system is also equipped with a flushing device to meet the requirements of regular maintenance and cleaning of photovoltaic modules. The photovoltaic power generation system is also equipped with a laser bird repellent device to reduce the corrosion of bird droppings on photovoltaic modules or the resulting local light spot effects on photovoltaic modules. For example, in order to avoid adverse effects such as bird droppings damaging the strength of the aluminum frame and bracket of photovoltaic modules, causing hot spot effects on photovoltaic modules and burning photovoltaic modules, and increasing the operation and maintenance costs of photovoltaic power generation systems, the photovoltaic power generation system is equipped with a set of laser bird repellent devices to achieve fully automatic and all-weather automatic bird repellent.

[0080] In the technical solution of the embodiment of the present application, the photovoltaic modules are installed in an open position on the main deck of a large deep-sea aquaculture vessel in a flat manner, which adapts to the various ship postures and light radiation angles of large deep-sea aquaculture vessels, and realizes the compatibility and adaptation of the photovoltaic modules with the solar radiation angles under different ship postures, so as to maximize the comprehensive power generation efficiency of the photovoltaic power generation system.

[0081] Optionally, continue to refer to Figure 2The DC power distribution system at least includes: an energy management system (EMS), a wind turbine control module 210, a photovoltaic control module 220, a temperature difference energy control module 230, a wave energy control module 240, a bidirectional DC inverter module (bidirectional DC / DC module) 250 and a bidirectional current conversion module 260; wherein the wind turbine control module 210, the photovoltaic control module 220, the temperature difference energy control module 230, and the wave energy control module 240 are all coupled to the energy management system EMS; the energy storage system EMS is coupled to the energy management system EMS through the bidirectional DC inverter module 250; the bidirectional current conversion module 260 is coupled to the current conversion isolation module 400; wherein the energy management system EMS is used to obtain the current operating conditions of the deep-sea large-scale aquaculture ship; and determine the operating mode of the multi-energy complementary power supply system and the power supply mode of the deep-sea large-scale aquaculture ship according to the current operating conditions of the deep-sea large-scale aquaculture ship.

[0082] The bidirectional conversion module may be a bidirectional conversion device (Power Conversion System, PCS). The fan control module may be a fan controller, and the photovoltaic control module may be a photovoltaic controller. The temperature difference energy control module may be a temperature difference energy controller, and the wave energy control module may be a wave energy controller.

[0083] Among them, the DC distribution system is also equipped with a DC distribution system group panel, which consists of a wind turbine & EMS control panel, a photovoltaic control panel, a temperature difference energy & wave energy reserved panel, a bidirectional DC / DC panel, an inlet and outlet line switch panel and a bidirectional converter panel.

[0084] Among them, the AC power distribution system also includes a power plant power management system (Power Management System, PMS), which is used to display the core operating parameters of the multi-energy complementary power supply system, provide an operation monitoring interface for the centralized control duty personnel, and realize upper-level visual management and centralized monitoring.

[0085] In addition, continue to read Figure 2 The multi-energy complementary power supply device also includes a monitoring alarm system (Intelligent Alarm System, IAS), which is used to alarm the key alarm information of the multi-energy complementary power supply system and provide alarm information to the centralized control duty personnel.

[0086] Among them, EMS is composed of compact controllers with strong algorithm processing capabilities, such as Programmable Logic Controller (PLC), as well as I / O modules, serial communication modules, Human-Machine Interface (HMI), switches, constant current source modules, etc. EMS communicates with wind turbine controllers, photovoltaic controllers, temperature difference energy controllers, wave energy controllers, bidirectional DC / DC modules, and bidirectional converters DC / AC through switches, and communicates with energy storage systems through RS485. EMS collects the operating status information of each module through communication and interacts with the power management system (PMS) and monitoring alarm system (IAS) of the power station through RS485 communication to realize the switching and coordinated control of the multi-energy complementary power supply system in different working modes. The operation and alarm parameters of equipment such as energy storage systems and DC distribution systems are provided to IAS by EMS communication, and IAS performs centralized display and alarm, providing operation and alarm information for centralized control personnel on duty. Among them, the operating parameters, alarm list, and partial control of the multi-energy complementary power supply system can be monitored, viewed, and operated through HMI.

[0087] Exemplarily, the DC bus voltage of the DC power distribution system is designed to be DC750V, and the AC bus voltage of the AC power distribution system is designed to be AC400V.

[0088] Exemplarily, the implementation process of the multi-energy complementary power supply system is as follows: Figure 2The multi-energy complementary power supply system includes a wind power generation system, a photovoltaic power generation system, a reserved port for a wave power generation system, a reserved port for a temperature difference power generation system, an energy storage system, a DC power distribution system, an isolation transformer, and an AC power distribution system. The wind power generation system is connected to the DC750V DC bus in the DC power distribution system through a wind turbine controller, the photovoltaic power generation system is connected to the DC750V DC bus in the DC power distribution system through a photovoltaic controller, the wave power generation system is connected to the DC750V DC bus in the DC power distribution system through a wave power controller, the temperature difference power generation system is connected to the DC750V DC bus in the DC power distribution system through a temperature difference power controller, and the energy storage system is connected to the DC750V DC bus in the DC power distribution system through a bidirectional DC / DC module. Then, the DC power distribution system is connected to the AC400V AC bus in the AC power distribution system through the PCS and the isolation transformer in turn to supply power to the ship load. Therefore, the multi-energy complementary power supply system 100 couples wind power generation and solar photovoltaic power generation according to the working area and design type applicability of the deep-sea large-scale aquaculture ship, and reserves interfaces for temperature difference power generation and wave power generation, and the deep-sea large-scale aquaculture ship. And according to the characteristics of various forms of power generation systems, the DC bus voltage of the DC distribution system is designed to be DC750V, which better matches the operating characteristics of each controller, realizes the uninterrupted operation of the multi-energy complementary power supply system of the full-cycle operation condition of the large-scale aquaculture ship, and realizes the energy saving and emission reduction of the ship to the greatest extent.

[0089] Moreover, the DC power distribution system in this application has a clear architecture and strong compatibility, and can be compatible with different forms of new energy power generation systems to the greatest extent, making it convenient for users to expand the capacity of the multi-energy complementary power supply system, and can flexibly cut off the power generation system with a single fault, thereby improving the reliability of power supply. In addition, the EMS in the DC power distribution system fully takes into account the various design load rates of large-scale aquaculture vessels, and is designed according to the characteristics of the multi-energy complementary power supply system. The control logic is rigorous and complete, realizing the maximum utilization of the multi-energy complementary power supply system.

[0090] Figure 3 is a control topology diagram of the energy storage system provided in the embodiment of the present application. Figure 2 and Figure 3 Optionally, the energy storage system includes at least: a cluster high-voltage box, a high-voltage junction box, a remote complex vision board, a battery management system and multiple energy storage units; wherein the energy storage system is installed in the battery compartment of a large deep-sea aquaculture vessel; the battery management system is coupled to the DC distribution system.

[0091] The energy storage system consists of energy storage units, cluster high-voltage boxes, high-voltage junction boxes, remote repeater boards, and battery management systems (BMS), and is installed in the battery compartment of large deep-sea aquaculture vessels.

[0092] Among them, the energy storage unit is generally a battery, and its architecture is that the battery packs are connected in series into clusters, and multiple clusters are connected in parallel into groups, and each group is an independent energy storage system.

[0093] Among them, BMS mainly includes BSU (BMS slave control unit), SBSU (BMS safety function slave control unit), BCMU (battery cluster management unit), SBCMU (safety function battery cluster management unit), BGMU (battery group management unit), forming a three-level control system architecture. Among them, BMS adopts a three-level control system architecture to measure the battery cell and system voltage, battery cell temperature, battery series loop current, ambient temperature, and battery system insulation resistance, and realizes the display and sound and light alarm of the core parameters of the energy storage system locally and remotely. At the same time, BMS realizes basic control and safety protection functions: such as realizing battery charging, discharging and charging and discharging equipment control, realizing battery cell and module balancing control, overcurrent protection, overcharge / over-discharge protection, over-temperature protection, self-test function fault protection, etc.

[0094] See also Figure 3 The minimum control unit 1.1 is a battery pack, the cluster high-voltage box 1.2 configured for each cluster is a secondary management unit, and the high-voltage junction box 1.3 configured after multiple clusters are grouped is a tertiary management unit. BMS can realize the functions of information collection, information processing, safety protection, power management, thermal management, balancing control, fault diagnosis and processing, interaction with external systems / equipment, HMI and remote monitoring, and data storage and recording of the energy storage system. Among them, the interaction between the energy storage system and the external system / equipment is realized by the high-voltage junction box.

[0095] Among them, BSU and SBSU are integrated inside the battery pack, and BSU is responsible for collecting information such as battery cell voltage and temperature. SBSU is responsible for collecting information such as battery over-temperature and over-voltage, and transmits the collected battery over-temperature and over-voltage information to SBCMU. BCMU and SBCMU are integrated inside the cluster high-voltage box. BCMU is used to summarize the information such as the cell voltage and temperature of all battery packs in the battery cluster, and collect the total voltage and total current of the battery cluster. It interacts with the upper-layer equipment to directly control the charging and discharging of the battery cluster, and provides related protection, alarm and other functions. SBCMU is used to summarize safety-related fault information such as battery cell over-temperature and over-voltage, and can independently perform protection actions to put the system into a safe state. BGMU is integrated in the high-voltage junction box and is used to manage multiple battery clusters, realize multi-cluster parallel operation and collect relevant information of the battery group. BGMU is responsible for interacting with the upper layer or external equipment, controlling the charging and discharging of multiple battery clusters, and providing related protection, alarm and other functions. BGMU has CAN, RS485 and Ethernet interfaces, which can communicate with the EMS, PMS and AMS systems of large deep-sea aquaculture vessels to facilitate coordinated management of the platform power supply system.

[0096] Among them, the battery cabin is equipped with ventilation, fire detection and fire alarm, fire fighting, fire extinguishing and other systems to make the battery cabin environment controllable.

[0097] Exemplarily, EMS, as the control core of the multi-energy complementary power supply system, coordinates the various power generation systems and energy storage systems in the DC distribution system. EMS has two control modes: manual and automatic. Among them, the "manual" mode control authority belongs to the control buttons on each screen, which is generally used for debugging. Among them, the "automatic" mode control authority is completely implemented by the EMS and PMS in collaboration. In automatic mode, combined with the different operating conditions of large deep-sea aquaculture vessels, it is divided into grid-connected operation mode and grid-connected / off-grid switching operation mode.

[0098] Exemplarily, in automatic mode, the current operating conditions of the deep-sea large-scale aquaculture ship are acquired in real time, and the operating mode of the multi-energy complementary power supply system and the power supply mode of the deep-sea large-scale aquaculture ship are reasonably configured according to the real-time operating conditions of the deep-sea large-scale aquaculture ship. Specifically, in the grid-connected mode, that is, the current operating condition of the deep-sea large-scale aquaculture ship is the migration condition or the DP cultural tourism aquaculture condition, the specific configuration method of the power supply mode of the deep-sea large-scale aquaculture ship is: Optionally, in the grid-connected mode, the first generator set and / or the multi-energy complementary power supply system supplies power to the deep-sea large-scale aquaculture ship. The DC distribution system is also configured to: acquire the battery charge state of the energy storage system, and determine the power supply mode of the deep-sea large-scale aquaculture ship in the grid-connected mode according to the battery charge state of the energy storage system.

[0099] Among them, the battery state of charge (SOC) of the energy storage system can be obtained in real time through the BMS.

[0100] Optionally, in the grid-connected mode, the EMS determines the power supply mode of the large-scale deep-sea aquaculture vessel in the grid-connected mode according to the battery state of charge of the energy storage system. The implementation process is as follows: in the grid-connected mode, when the battery state of charge of the energy storage system is greater than the first preset threshold, the multi-energy power generation system is controlled to output at full capacity, and the energy storage system is controlled to supply power to the large-scale deep-sea aquaculture vessel; when the battery state of charge of the energy storage system is greater than the second preset threshold and less than the first preset threshold, the rated output of the multi-energy power generation system is controlled, and the energy storage system is controlled not to supply power to the large-scale deep-sea aquaculture vessel; when the battery state of charge of the energy storage system is greater than the third preset threshold and less than the second preset threshold, the multi-energy power generation system is controlled to operate at limited power, and the remaining electric energy of the multi-energy power generation system is used to charge the energy storage system; when the battery state of charge of the energy storage system is less than the third preset threshold, the multi-energy power generation system is controlled to no longer supply power to the large-scale deep-sea aquaculture vessel, and the energy storage system is charged.

[0101] For example, the first preset threshold is 80%, the second preset threshold is 60%, and the third preset threshold is 30%. PCS , the power generation of the photovoltaic power generation system is P PV , the power generation of the wind turbine in the wind power generation system is P Wn , the power generation of the temperature difference energy system is P TG , the power generation of the wave energy generation system is P Wa , the output power of the energy storage system is P bat-Out , the charging power of the energy storage system is P bat-In .

[0102] Figure 4 Schematic diagram of the control flow of the multi-energy complementary power supply system in the grid-connected mode provided in the embodiment of the present application. Figure 4 , when SOC is greater than 80%, P PCS =1.1(P PV +P Wn +P TG +P Wa )+P bat-Out , that is, the multi-energy complementary power supply system is in good supply. At this time, the wind power generation system, photovoltaic power generation system, temperature difference power generation system and wave power generation system are controlled to output at full capacity to supply power to large deep-sea aquaculture vessels. At the same time, the energy storage system is controlled to supply power to large deep-sea aquaculture vessels. When SOC is greater than 60% and less than 80%, P PCS =P PV +P Wn +P TG +P Wa , that is, the multi-energy complementary power supply system is in good supply. At this time, the wind power generation system, photovoltaic power generation system, temperature difference power generation system and wave power generation system are controlled to output at rated value, and the energy storage system is controlled to stop supplying power to the outside. When SOC is greater than 30% and less than 60%, P PCS =0.9(P PV +P Wn +P TG +P Wa ), P bat-In =0.1(P PV +P Wn +P TG +P Wa ), that is, at this time, the multi-energy complementary power supply system is running at limited power, and the remaining power of the wind power generation system, photovoltaic power generation system, temperature difference power generation system and wave power generation system is controlled to charge the energy storage system. When SOC is less than 30%, P bat-In =P PV +P Wn +P TG +P WaAt this time, the wind power generation system, photovoltaic power generation system, temperature difference energy generation system and wave energy generation system are controlled to no longer supply power to the outside, but the wind power generation system, photovoltaic power generation system, temperature difference energy generation system and wave energy generation system are controlled to charge the energy storage system.

[0103] Exemplarily, in automatic mode, the current operating conditions of the deep-sea large-scale aquaculture ship are obtained in real time, and the operating mode of the multi-energy complementary power supply system and the power supply mode of the deep-sea large-scale aquaculture ship are reasonably configured according to the real-time operating conditions of the deep-sea large-scale aquaculture ship. Specifically, in the on-grid / off-grid mode, that is, the current operating condition of the deep-sea large-scale aquaculture ship is any one of the aquaculture condition, the cultural tourism aquaculture condition, the sinking and floating condition and the emergency condition, the specific configuration method of the power supply mode of the deep-sea large-scale aquaculture ship is: Optionally, in the on-grid / off-grid mode, the first generator set is controlled to stop running, the second generator set is operated intermittently, and the multi-energy complementary power supply system is operated in the on-grid / off-grid mode, and the deep-sea large-scale aquaculture ship is powered by the second generator set and / or the multi-energy complementary power supply system.

[0104] Exemplarily, the first generator set is a main diesel generator set of a ship power station, and the second generator set is an emergency and mooring diesel generator set.

[0105] Specifically, the EMS is in automatic mode, and the deep-sea large-scale aquaculture vessels operate in the designed aquaculture conditions, cultural and tourism aquaculture conditions, sinking and floating conditions, and emergency conditions. At this time, the main diesel generator set of the ship power station stops running, the emergency and mooring diesel generator set runs intermittently, and the multi-energy complementary power supply system is in the grid-connected / off-grid operation mode. In this operation mode, the EMS system controls the operation mode of the multi-energy complementary power supply system according to the operating status and load power of the emergency and mooring generator set, so as to reasonably configure the power supply mode of the deep-sea large-scale aquaculture vessels, thereby meeting the power supply needs of the deep-sea large-scale aquaculture vessels under aquaculture conditions, cultural and tourism aquaculture conditions, sinking and floating conditions, and emergency conditions, and complements the power supply of various new energy sources, making up for the intermittent shortage between different new energy power generation forms, and by configuring the energy storage system inside the system, effectively improving the stability and reliability of the multi-energy complementary power supply system and improving the power supply quality, meeting the requirements of energy conservation and emission reduction, and improving energy utilization.

[0106] Optionally, in the on-grid / off-grid operation mode, the method of supplying power to the large deep-sea aquaculture vessel by the second generator set and / or the multi-energy complementary power supply system is as follows: obtaining the operating status of the second generator set, the load power of the large deep-sea aquaculture vessel and the output power of the multi-energy power generation system; and determining the power supply method of the large deep-sea aquaculture vessel in the on-grid / off-grid mode according to the operating status of the second generator set, the load power of the large deep-sea aquaculture vessel and the output power of the multi-energy power generation system.

[0107] The operating status of the second generator set includes operating and non-operating.

[0108] Among them, the output power of the multi-energy power generation system includes the power generation power P of the photovoltaic power generation system PV , the power generation power P of the wind turbine generator set of the wind power generation system Wn , the power generation of the temperature difference energy system is P TG And the power generation power P of the wave energy power generation system Wa .

[0109] Optionally, in the on-grid / off-grid operation mode, the power supply method of the large deep-sea aquaculture ship in the on-grid / off-grid mode is determined according to the operating status of the second generator set, the load power of the large deep-sea aquaculture ship and the output power of the multi-energy power generation system. The implementation process is as follows: in the on-grid / off-grid mode, when the second generator set is not running and the load power of the large deep-sea aquaculture ship is less than or equal to the output power of the multi-energy power generation system, the multi-energy complementary power supply system is controlled to operate in the off-grid mode and supply power to the large deep-sea aquaculture ship; when the second generator set is running and the load power of the large deep-sea aquaculture ship is greater than the output power of the multi-energy power generation system, the multi-energy complementary power supply system is controlled to operate in the on-grid mode, and the large deep-sea aquaculture ship is supplied with power by the multi-energy complementary power supply system and the second generator set.

[0110] Among them, when the second generator set is not running and the load power of the large deep-sea aquaculture ship is less than or equal to the output power of the multi-energy power generation system, the multi-energy complementary power supply system is in off-grid operation mode to supply power to the load alone. At this time, the operation of each power generation module in the multi-energy complementary power supply system is judged according to the battery charge state of the energy storage system to reasonably configure the power supply mode of the large deep-sea aquaculture ship.

[0111] Among them, when the second generator set is running and the load power of the large deep-sea aquaculture ship is greater than the output power of the multi-energy power generation system, the multi-energy complementary power supply system and the second generator set jointly supply power to the large deep-sea aquaculture ship. At this time, the operation of each power generation module in the multi-energy complementary power supply system is judged according to the battery charge state of the energy storage system, so as to reasonably configure the power supply mode of the large deep-sea aquaculture ship.

[0112] Figure 5It is a control flow diagram of the multi-energy complementary power supply system in the on-grid / off-grid mode provided in the embodiment of the present application. Optionally, in the on-grid / off-grid operation mode, the second generator set and / or the multi-energy complementary power supply system supplies power to the large deep-sea aquaculture vessel in the following manner: when the second generator set is not running and the multi-energy complementary power supply system is operating in the off-grid mode, when the battery state of charge of the energy storage system is greater than the first preset threshold, the multi-energy power generation system and the energy storage system are controlled to jointly supply power to the large deep-sea aquaculture vessel; when the battery state of charge of the energy storage system is greater than the second preset threshold and less than the first preset threshold, the multi-energy power generation system is controlled to supply power to the large deep-sea aquaculture vessel, and the remaining electric energy of the multi-energy power generation system is charged to the energy storage system; when the battery state of charge of the energy storage system is less than the second preset threshold, the multi-energy power generation system is controlled to no longer supply power to the large deep-sea aquaculture vessel, and the second generator set is controlled to start.

[0113] When the second generator set is running and the multi-energy complementary power supply system is operating in the grid-connected mode, when the battery charge state of the energy storage system is greater than the third preset threshold, the rated output of the multi-energy power generation system is controlled, and the multi-energy power generation system and the energy storage system are controlled to jointly supply power to the large deep-sea aquaculture vessel; when the battery charge state of the energy storage system is less than the third preset threshold, the multi-energy power generation system is controlled to stop supplying power to the large deep-sea aquaculture vessel and charge the energy storage system, and the second generator set is controlled to start.

[0114] For example, the first preset threshold is 80%, the second preset threshold is 60%, and the third preset threshold is 30%. Load .

[0115] For example, see Figure 5 , when the emergency and parking diesel generator set is not running, and P Load ≤P PV +P Wn +P TG +P Wa When the multi-energy complementary power supply system is in off-grid operation mode, it supplies power to the load alone. At this time, the operation of each power generation module in the multi-energy complementary power supply system is determined according to the battery state of charge SOC of the energy storage system, that is:

[0116] When SOC is greater than 80%, P PCS =P Load , P PV +P Wn +P TG +P Wa =0.9P Load , P bat-Out =0.1P Load, that is, limiting the power output of wind power generation system, photovoltaic power generation system, temperature difference power generation system and wave power generation system, a small part of the load power is provided by the energy storage system. When SOC is greater than 60% and less than 80%, P PCS =P Load , P bat-In =P PV +P Wn +P TG +P Wa -P Load , that is, the load power is completely provided by the wind power generation system, photovoltaic power generation system, temperature difference energy generation system and wave power generation system, and the remaining power of the wind power generation system, photovoltaic power generation system, temperature difference energy generation system and wave power generation system is used to charge the energy storage system. When SOC is less than 60%, the wind power generation system, photovoltaic power generation system, temperature difference energy generation system and wave power generation system are controlled to stop supplying power to the outside, and the emergency and moored diesel generator set is controlled to start.

[0117] When the emergency and parking diesel generator set is running and P Load >P PV +P Wn +P TG +P Wa When the multi-energy complementary power supply system and the emergency and parking generator set jointly supply power to the load, the operation of each power generation module in the multi-energy complementary power supply system is determined according to the state of charge (SOC) of the energy storage system battery, namely:

[0118] When SOC is greater than 30%, P PCS =P Load =P PV +P Wn +P TG +P Wa +P bat-Out , that is, controlling the rated output of the wind power generation system, photovoltaic power generation system, temperature difference power generation system and wave power generation system, and at the same time controlling the energy storage system to supply power to the outside. When SOC is less than 30%, P bat-In =P PV +P Wn +P TG +P Wa That is, control the wind power generation system, photovoltaic power generation system, thermoelectric power generation system and wave power generation system to stop external power supply, and control the wind power generation system, photovoltaic power generation system, thermoelectric power generation system and wave power generation system to charge the energy storage system, and at the same time control the start-up of the emergency and moored generator set.

[0119] It can be seen that the embodiment of the present application forms a design method for a multi-energy complementary power supply system by integrating various forms of power generation systems, which makes up for the intermittent shortage between different forms of new energy power generation. And configure the energy storage system inside the system, effectively improve the stability and reliability of the multi-energy complementary power supply system and improve the power supply quality. And by obtaining the current operating conditions of the deep-sea large-scale aquaculture ship in real time, and controlling the operating mode of the multi-energy complementary power supply system according to the specific operating conditions of the deep-sea large-scale aquaculture ship, the power supply mode of the deep-sea large-scale aquaculture ship is reasonably configured, so as to meet the power supply needs of the deep-sea large-scale aquaculture ship in migration conditions, DP cultural tourism aquaculture conditions, aquaculture conditions, cultural tourism aquaculture conditions, sinking and floating conditions and emergency conditions, and complement the power supply of various new energy sources, which makes up for the intermittent shortage between different forms of new energy power generation, and by configuring the energy storage system inside the system, the stability and reliability of the multi-energy complementary power supply system are effectively improved, and the power supply quality is improved, meeting the requirements of energy conservation and emission reduction, and improving energy utilization.

[0120] Figure 6 is a flow chart of a control method of a multi-energy complementary power supply device provided in an embodiment of the present application. Correspondingly, an embodiment of the present application also provides a control method of a multi-energy complementary power supply device, please refer to Figure 6 , the method comprises the following steps:

[0121] Step 11: Obtain the current operating conditions of the large deep-sea aquaculture vessel.

[0122] Step 12: Determine the operation mode of the multi-energy complementary power supply system and the power supply mode of the large deep-sea aquaculture vessel according to the current operation condition of the large deep-sea aquaculture vessel.

[0123] The technical solution of this embodiment provides a control method for a multi-energy complementary power supply device, which includes: obtaining the current operating conditions of a deep-sea large-scale aquaculture ship; and determining the operating mode of the multi-energy complementary power supply system and the power supply method of the deep-sea large-scale aquaculture ship according to the current operating conditions of the deep-sea large-scale aquaculture ship. This method can be used to improve the effective utilization rate of energy and meet the needs of energy conservation and emission reduction by providing multiple energy sources and supplying energy to the deep-sea large-scale aquaculture ship in a complementary manner. In addition, the operating conditions of the deep-sea large-scale aquaculture ship are obtained in real time, and the operating mode of the multi-energy complementary power supply system and the power supply method of the deep-sea large-scale aquaculture ship are reasonably configured according to the real-time operating conditions of the deep-sea large-scale aquaculture ship, so as to meet the operating load of the deep-sea large-scale aquaculture ship, so that the deep-sea large-scale aquaculture ship can achieve full-cycle uninterrupted operation, and further meet the needs of energy conservation and emission reduction, improve energy utilization, and reduce costs.

[0124] The multi-energy complementary power supply device and its control method provided in the embodiments of the present application are introduced in detail above, and the principles and implementation methods of the present application are explained by using specific examples. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technical personnel in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A multi-energy complementary power supply device, characterized in that: Applied to large-scale deep-sea aquaculture vessels, the device comprises: a multi-energy complementary power supply system, a DC power distribution system, an AC power distribution system and a current conversion isolation module; wherein the DC power distribution system is coupled to the multi-energy complementary power supply system; the DC power distribution system outputs the electric energy provided by the multi-energy complementary power supply system to the AC power distribution system after conversion and isolation through the current conversion isolation module; The DC power distribution system is configured to: obtain the current operating condition of the large-scale deep-sea aquaculture ship; and determine the operating mode of the multi-energy complementary power supply system and the power supply method of the large-scale deep-sea aquaculture ship according to the current operating condition of the large-scale deep-sea aquaculture ship.

2. The multi-energy complementary power supply device according to claim 1, characterized in that: The current operating conditions of the deep-sea large-scale aquaculture vessel include at least one of: migration conditions, DP cultural tourism aquaculture conditions, aquaculture conditions, cultural tourism aquaculture conditions, sinking and floating conditions, and emergency conditions; the operating mode of the multi-energy complementary power supply system includes at least one of a grid-connected mode and a grid-connected / off-grid mode; The DC power distribution system is further configured to: when the current operating condition of the deep-sea large-scale aquaculture vessel is a migration condition or a DP cultural tourism aquaculture condition, control the multi-energy complementary power supply system to operate in the grid-connected mode; When the current operating condition of the large deep-sea aquaculture vessel is one of an aquaculture condition, a cultural and tourism aquaculture condition, a sinking and floating condition, and an emergency condition, the multi-energy complementary power supply system is controlled to operate in the on-grid / off-grid mode.

3. The multi-energy complementary power supply device according to claim 2, characterized in that: The large deep-sea aquaculture vessel comprises at least a first generator set and a second generator set; the DC power distribution system is further configured to: in the grid-connected mode, the first generator set and / or the multi-energy complementary power supply system supplies power to the large deep-sea aquaculture vessel; In the on-grid / off-grid mode, the first generator set is controlled to stop running, the second generator set is operated intermittently, and the multi-energy complementary power supply system is operated in the on-grid / off-grid mode, and the second generator set and / or the multi-energy complementary power supply system are used to supply power to the large deep-sea aquaculture vessel.

4. The multi-energy complementary power supply device according to claim 3, characterized in that: The multi-energy complementary power supply system at least includes a multi-energy power generation system and an energy storage system; The DC power distribution system is also configured to: obtain the battery charge state of the energy storage system, and determine the power supply method of the large deep-sea aquaculture vessel in the grid-connected mode according to the battery charge state of the energy storage system.

5. The multi-energy complementary power supply device according to claim 4, characterized in that: The DC power distribution system is further configured to: in the grid-connected mode, when the battery state of charge of the energy storage system is greater than a first preset threshold, control the multi-energy power generation system to output at full capacity, and control the energy storage system to supply power to the deep-sea large-scale aquaculture vessel; When the battery state of charge of the energy storage system is greater than a second preset threshold and less than the first preset threshold, the rated output of the multi-energy power generation system is controlled, and the energy storage system is controlled not to supply power to the deep-sea large-scale aquaculture vessel; When the battery state of charge of the energy storage system is greater than a third preset threshold and less than the second preset threshold, controlling the multi-energy power generation system to operate with limited power, and using the remaining electric energy of the multi-energy power generation system to charge the energy storage system; When the battery charge state of the energy storage system is less than the third preset threshold, the multi-energy power generation system is controlled to stop supplying power to the large deep-sea aquaculture vessel and to charge the energy storage system.

6. The multi-energy complementary power supply device according to claim 4, characterized in that: The DC power distribution system is also configured to: obtain the operating status of the second generator set, the load power of the large deep-sea aquaculture ship and the output power of the multi-energy power generation system; and determine the power supply method of the large deep-sea aquaculture ship in the on-grid / off-grid mode according to the operating status of the second generator set, the load power of the large deep-sea aquaculture ship and the output power of the multi-energy power generation system.

7. The multi-energy complementary power supply device according to claim 6, characterized in that: The DC power distribution system is further configured as follows: In the on-grid / off-grid mode, when the second generator set is not running and the load power of the deep-sea large-scale aquaculture vessel is less than or equal to the output power of the multi-energy power generation system, the multi-energy complementary power supply system is controlled to operate in the off-grid mode and supply power to the deep-sea large-scale aquaculture vessel; When the second generator set is running and the load power of the large deep-sea aquaculture ship is greater than the output power of the multi-energy power generation system, the multi-energy complementary power supply system is controlled to operate in the grid-connected mode, and the multi-energy complementary power supply system and the second generator set jointly supply power to the large deep-sea aquaculture ship.

8. The multi-energy complementary power supply device according to claim 7, characterized in that: The DC power distribution system is further configured as follows: When the second generator set is not running and the multi-energy complementary power supply system is running in an off-grid mode, when the battery charge state of the energy storage system is greater than a first preset threshold, the multi-energy power generation system and the energy storage system are controlled to jointly supply power to the deep-sea large-scale aquaculture vessel; When the battery charge state of the energy storage system is greater than a second preset threshold value and less than the first preset threshold value, the multi-energy power generation system is controlled to supply power to the deep-sea large-scale aquaculture vessel, and the surplus power of the multi-energy power generation system is used to charge the energy storage system; When the battery charge state of the energy storage system is less than the second preset threshold, the multi-energy power generation system is controlled to no longer supply power to the large deep-sea aquaculture vessel, and the second generator set is controlled to start.

9. The multi-energy complementary power supply device according to claim 7, characterized in that: The DC power distribution system is further configured as follows: When the second generator set is running and the multi-energy complementary power supply system is running in the grid-connected mode, when the battery charge state of the energy storage system is greater than a third preset threshold, the rated output of the multi-energy power generation system is controlled, and the multi-energy power generation system and the energy storage system are controlled to jointly supply power to the large deep-sea aquaculture vessel; When the battery charge state of the energy storage system is less than a third preset threshold, the multi-energy power generation system is controlled to stop supplying power to the large deep-sea aquaculture vessel and charge the energy storage system, and the second generator set is controlled to start.

10. The multi-energy complementary power supply device according to claim 4, characterized in that: The multi-energy power generation system at least includes: one or more of a wind power generation system, a photovoltaic power generation system, a temperature difference power generation system and a wave power generation system.

11. The multi-energy complementary power supply device according to claim 4, characterized in that: The DC power distribution system at least includes: an energy management system, a fan control module, a photovoltaic control module, a temperature difference energy control module, a wave energy control module, a bidirectional DC inverter module and a bidirectional converter module; The wind turbine control module, photovoltaic control module, temperature difference energy control module and wave energy control module are all coupled to the energy management system; the energy storage system is coupled to the energy management system through the bidirectional DC inverter module; the bidirectional current conversion module is coupled to the current conversion isolation module; Among them, the energy management system is used to obtain the current operating conditions of the large-scale deep-sea aquaculture ship; and determine the operating mode of the multi-energy complementary power supply system and the power supply method of the large-scale deep-sea aquaculture ship according to the current operating conditions of the large-scale deep-sea aquaculture ship.

12. The multi-energy complementary power supply device according to claim 10, characterized in that: The photovoltaic power generation system at least includes: photovoltaic modules, photovoltaic junction boxes, photovoltaic mounting brackets, flushing devices and laser bird repellent devices; wherein, the photovoltaic power generation system is installed in a flat and open position on the main deck of the large deep-sea aquaculture vessel; the photovoltaic modules are installed on the main deck in a flat manner.

13. The multi-energy complementary power supply device according to claim 4, characterized in that: The energy storage system comprises at least: a cluster high-voltage box, a high-voltage junction box, a remote repeater board, a battery management system and a plurality of energy storage units; wherein the energy storage system is installed in the battery compartment of the large deep-sea aquaculture vessel; and the battery management system is coupled to the DC power distribution system.

14. A control method for a multi-energy complementary power supply device according to any one of claims 1 to 13, characterized in that: include: Obtaining the current operating condition of the large deep-sea aquaculture vessel; And according to the current operating conditions of the large-scale deep-sea aquaculture vessel, the operating mode of the multi-energy complementary power supply system and the power supply method of the large-scale deep-sea aquaculture vessel are determined.

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