Ship power system based on direct current networking

Abstract

The invention discloses a ship power system based on direct current networking, and relates to the technical field of power systems, and the ship power system comprises an energy module, a wind propulsion module, an electric propulsion module and a water power recovery module which are respectively connected with a direct current bus; the energy module is used for transmitting electric energy to a ship power system through a direct-current bus; the wind power propulsion module is used for converting wind energy into kinetic energy; the electric propulsion model is used for receiving the electric energy transmitted by the energy module through the direct-current bus and converting the received electric energy into kinetic energy; the hydrodynamic force recovery module is used for converting kinetic energy generated by hydrodynamic force into electric energy, and the electric energy obtained through conversion is transmitted to the energy module through the direct-current bus to be stored. Electric energy of the energy module can be transmitted to each part of the transmission power system through the direct current bus, and energy is provided for the transmission power system; the wind power propulsion module can provide part of kinetic energy, and dependence on fuel oil is reduced; the water power recovery module can recover kinetic energy generated by waste water and sewage on the ship, and the energy utilization rate is increased.

Description

Technical Field

[0001] The present application relates to the technical field of power systems, and in particular to a ship power system based on direct current networking. Background Art

[0002] Bulk carriers usually need to carry 10,000 tons of cargo, so they need a reliable power system to provide protection. The performance of the power system is largely limited by the performance of the energy module. However, the current ship power system has low energy utilization and is more dependent on fuel consumption. Summary of the invention

[0003] The main purpose of the embodiments of the present application is to propose a ship power system based on DC networking to reduce fuel restrictions and improve energy utilization efficiency.

[0004] To achieve the above-mentioned purpose, one aspect of an embodiment of the present application proposes a ship power system based on DC networking, the system comprising: an energy module, a DC bus, a wind propulsion module, an electric propulsion module and a water power recovery module;

[0005] Wherein, the energy module, the wind propulsion module, the electric propulsion module and the hydrodynamic recovery module are respectively connected to the DC bus;

[0006] The energy module is used to transmit electric energy to the ship power system through the DC bus;

[0007] The wind propulsion module is used to convert wind energy into kinetic energy;

[0008] The electric propulsion model is used to receive the electric energy transmitted by the energy module through the DC bus and convert the received electric energy into kinetic energy;

[0009] The hydrodynamic recovery module is used to convert the kinetic energy generated by the hydrodynamics into electrical energy, and the converted electrical energy is transmitted to the energy module for storage through the DC bus.

[0010] In some embodiments, the energy module includes a main power module, a backup power module, and an energy collection module;

[0011] Wherein, the main power supply module is used to generate direct current and transmit the generated direct current to the ship power system through the direct current bus;

[0012] The backup power supply module is used to generate alternating current and convert the generated alternating current into direct current, and then transmit the converted direct current to the ship power system;

[0013] The energy collection module is used to collect and store renewable energy.

[0014] In some embodiments, the main power module includes a lithium iron phosphate battery pack and a supercapacitor;

[0015] The lithium iron phosphate battery pack is used to generate direct current, and reduce the generated direct current through a first direct current to direct current bidirectional converter, and then continuously output the reduced direct current at a first power through the direct current bus to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module;

[0016] The supercapacitor is used to generate direct current, and reduce the generated direct current through a second direct current to direct current bidirectional converter, and then output the reduced direct current at a second power through the direct current bus to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module within a set time; the second power is greater than the first power.

[0017] In some embodiments, the backup power module includes an emergency generator;

[0018] The emergency generator is used to consume at least one of liquefied natural gas, methanol or hydrogen to generate alternating current, and convert the generated alternating current into direct current and reduce the current through an AC to DC unidirectional converter, and then output the obtained direct current to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module through the DC bus.

[0019] In some embodiments, the energy collection module includes a plurality of solar photovoltaic panels;

[0020] Each of the solar photovoltaic panels is used to convert solar energy into electrical energy, and reduce the current through a first DC to DC unidirectional converter, and then output it to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module through the DC bus.

[0021] In some embodiments, the wind propulsion module includes a rigid retractable wingsail and a wingsail detection and adjustment device; the wingsail detection and adjustment device includes a wind direction and wind force sensor; the DC bus is connected to the wingsail detection and adjustment device through a second DC to DC unidirectional converter;

[0022] Wherein, the wind direction and wind force sensor is used to collect wind parameters;

[0023] The wingsail detection and adjustment device is used to adjust the posture of the rigid retractable wingsail according to the wind parameters.

[0024] In some embodiments, the alloy pole at the bottom of the rigid retractable wing sail is connected to a spherical base on the hull;

[0025] The spherical base can be rotated 360 degrees horizontally to adjust the direction of the rigid retractable wing sail;

[0026] The spherical base is rotatable in a vertical plane to adjust the tilt angle of the rigid retractable wingsail;

[0027] The rigid retractable wing sail is designed to be multi-segmented from bottom to top, and the size of each segment is uniformly reduced. An electric slide rail is installed between each segment, and the segment can be vertically displaced by the electric slide rail to adjust the height of the rigid retractable wing sail;

[0028] The wingsail detection and adjustment device is used to adjust the orientation, the tilt angle and the height of the rigid retractable wingsail according to the wind parameters.

[0029] In some embodiments, the electric propulsion module includes an electric motor, a clutch, a gearbox, and a propeller connected in sequence;

[0030] The DC bus is connected to the motor via a first DC to AC unidirectional converter.

[0031] In some embodiments, when the kinetic energy converted by the wind propulsion module reaches a preset threshold, the energy module is used to output electrical energy to the motor through the DC bus at one of high power, medium power or low power; wherein the high power has a value range of more than 70% of the full power of the energy module, the medium power has a value range of 40% to 70% of the full power of the energy module, and the low power has a value range of less than 40% of the full power of the energy module;

[0032] When the kinetic energy converted by the wind propulsion module is less than the preset threshold, the energy module is used to output electrical energy to the motor through the DC bus at full power.

[0033] In some embodiments, the hydrodynamic recovery module includes a turbine generator, a valve, a filter, a sewage collection tank, a water pump, and a shore discharge receiving and processing device;

[0034] Wherein, the DC bus is connected to the electrical interface of the turbine generator through a second DC to AC unidirectional converter;

[0035] The first port of the turbine generator is connected to the first end of the valve, the second end of the valve is connected to the sewage collection chamber, and the filter is arranged between the second end of the valve and the sewage collection chamber;

[0036] The second port of the turbine generator is connected to the first end of the water pump; the second end of the water pump is connected to the shore discharge receiving and processing device.

[0037] The embodiments of the present application include at least the following beneficial effects:

[0038] The power transmission system of the present application may include: an energy module, a DC bus, a wind propulsion module, an electric propulsion module and a hydrodynamic recovery module; wherein the energy module, the wind propulsion module, the electric propulsion module and the hydrodynamic recovery module are respectively connected to the DC bus; the energy module is used to transmit electric energy to the ship power system through the DC bus; the wind propulsion module is used to convert wind energy into kinetic energy; the electric propulsion module is used to receive the electric energy transmitted by the energy module through the DC bus and convert the received electric energy into kinetic energy; the hydrodynamic recovery module is used to convert the kinetic energy generated by the hydrodynamic force into electric energy, and the converted electric energy is transmitted to the energy module through the DC bus for storage. The electric energy of the energy module can be transmitted to various parts of the power transmission system through the DC bus to provide energy for the power transmission system; the wind propulsion module can provide part of the kinetic energy to reduce the dependence on fuel; the electric propulsion module can provide the main kinetic energy, so that when the action provided by the wind propulsion module is insufficient, it can continue to provide kinetic energy for the power transmission system; the hydrodynamic recovery module can recover the kinetic energy generated by the wastewater and sewage on board, thereby improving the energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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 ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A schematic diagram of the structure of a ship power system based on DC networking provided in an embodiment of the present application;

[0041] Figure 2 An example structural diagram of a ship power system based on DC networking provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0043] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0044] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0046] Reference Figure 1 , the present application provides a ship power system based on DC networking, the system comprising: an energy module, a DC bus, a wind propulsion module, an electric propulsion module and a hydrodynamic recovery module;

[0047] Wherein, the energy module, the wind propulsion module, the electric propulsion module and the hydrodynamic recovery module are respectively connected to the DC bus;

[0048] The energy module is used to transmit electric energy to the ship power system through the DC bus;

[0049] The wind propulsion module is used to convert wind energy into kinetic energy;

[0050] The electric propulsion model is used to receive the electric energy transmitted by the energy module through the DC bus and convert the received electric energy into kinetic energy;

[0051] The hydrodynamic recovery module is used to convert the kinetic energy generated by the hydrodynamics into electrical energy, and the converted electrical energy is transmitted to the energy module for storage through the DC bus.

[0052] Next, the energy module of the present application is further described.

[0053] In some embodiments, the energy module includes a main power module, a backup power module, and an energy collection module;

[0054] Wherein, the main power supply module is used to generate direct current and transmit the generated direct current to the ship power system through the direct current bus;

[0055] The backup power supply module is used to generate alternating current and convert the generated alternating current into direct current, and then transmit the converted direct current to the ship power system;

[0056] The energy collection module is used to collect and store renewable energy.

[0057] As an optional implementation, the main power module of this embodiment can continuously output electrical energy to provide energy for the ship power system. When the main power module is underpowered (the output electrical energy is lower than the set threshold) or fails, this embodiment can use the backup power module to provide energy for the ship power system.

[0058] Furthermore, the main power supply module is described in detail.

[0059] In some embodiments, the main power module includes a lithium iron phosphate battery pack and a supercapacitor;

[0060] The lithium iron phosphate battery pack is used to generate direct current, and reduce the generated direct current through a first direct current to direct current bidirectional converter, and then continuously output the reduced direct current at a first power through the direct current bus to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module;

[0061] The supercapacitor is used to generate direct current, and reduce the generated direct current through a second direct current to direct current bidirectional converter, and then output the reduced direct current at a second power through the direct current bus to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module within a set time; the second power is greater than the first power.

[0062] Furthermore, the backup power supply module is described in detail.

[0063] In some embodiments, the backup power module includes an emergency generator;

[0064] The emergency generator is used to consume at least one of liquefied natural gas, methanol or hydrogen to generate alternating current, and convert the generated alternating current into direct current and reduce the current through an AC to DC unidirectional converter, and then output the obtained direct current to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module through the DC bus.

[0065] Furthermore, the energy collection module is described in detail.

[0066] In some embodiments, the energy collection module includes a plurality of solar photovoltaic panels;

[0067] Each of the solar photovoltaic panels is used to convert solar energy into electrical energy, and reduce the current through a first DC to DC unidirectional converter, and then output it to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module through the DC bus.

[0068] Next, the wind propulsion module is further explained.

[0069] In some embodiments, the wind propulsion module includes a rigid retractable wingsail and a wingsail detection and adjustment device; the wingsail detection and adjustment device includes a wind direction and wind force sensor; the DC bus is connected to the wingsail detection and adjustment device through a second DC to DC unidirectional converter;

[0070] Wherein, the wind direction and wind force sensor is used to collect wind parameters;

[0071] The wingsail detection and adjustment device is used to adjust the posture of the rigid retractable wingsail according to the wind parameters.

[0072] Furthermore, in some embodiments, the alloy rod at the bottom of the rigid retractable wing sail is connected to a spherical base on the hull;

[0073] The spherical base can be rotated 360 degrees horizontally to adjust the direction of the rigid retractable wing sail;

[0074] The spherical base is rotatable in a vertical plane to adjust the tilt angle of the rigid retractable wingsail;

[0075] The rigid retractable wing sail is designed to be multi-segmented from bottom to top, and the size of each segment is uniformly reduced. An electric slide rail is installed between each segment, and the segment can be vertically displaced by the electric slide rail to adjust the height of the rigid retractable wing sail;

[0076] The wingsail detection and adjustment device is used to adjust the orientation, the tilt angle and the height of the rigid retractable wingsail according to the wind parameters.

[0077] Next, the electric propulsion module is further explained.

[0078] In some embodiments, the electric propulsion module includes an electric motor, a clutch, a gearbox, and a propeller connected in sequence;

[0079] The DC bus is connected to the motor via a first DC to AC unidirectional converter.

[0080] More specifically, in some embodiments, when the kinetic energy converted by the wind propulsion module reaches a preset threshold, the energy module is used to output electrical energy to the motor through the DC bus at one of high power, medium power or low power; wherein the high power has a value range of more than 70% of the full power of the energy module, the medium power has a value range of 40% to 70% of the full power of the energy module, and the low power has a value range of less than 40% of the full power of the energy module;

[0081] When the kinetic energy converted by the wind propulsion module is less than the preset threshold, the energy module is used to output electrical energy to the motor through the DC bus at full power.

[0082] Next, the hydrodynamic recovery module is further explained.

[0083] In some embodiments, the hydrodynamic recovery module includes a turbine generator, a valve, a filter, a sewage collection tank, a water pump, and a shore discharge receiving and processing device;

[0084] Wherein, the DC bus is connected to the electrical interface of the turbine generator through a second DC to AC unidirectional converter;

[0085] The first port of the turbine generator is connected to the first end of the valve, the second end of the valve is connected to the sewage collection chamber, and the filter is arranged between the second end of the valve and the sewage collection chamber;

[0086] The second port of the turbine generator is connected to the first end of the water pump; the second end of the water pump is connected to the shore discharge receiving and processing device.

[0087] Specifically, in terms of the utilization of tank washing water of bulk carriers, the present embodiment collects tank washing water through a sewage collection tank. When the sewage is discharged to the shore for treatment, the valve is opened, and the sewage is pumped into the receiving pipe under the action of a water pump (for example, a centrifugal water pump). The filter can filter out large pieces of solid dirt in the sewage to avoid clogging the pipeline. After the sewage enters the receiving pipe, it drives the turbine generator in the pipeline to rotate and generate electricity. The current is connected to the DC bus through the second DC to AC unidirectional converter and then stored in the energy module. After that, the sewage enters the shore receiving and treatment device for centralized treatment and is discharged after meeting the emission standards.

[0088] In terms of ballast water utilization, when the ballast water is sucked into or discharged from the sewage collection tank, the valve opens and the ballast water is pressed in or discharged under the action of the water pump. In this process, the filter can filter out large solid objects and organisms in the sewage collection tank. The flow of ballast water in the pipeline drives the blades in the turbine generator to rotate and generate electricity. The current is connected to the DC bus through the second DC to AC unidirectional converter and then stored in the energy module.

[0089] Next, the solution of the embodiment of the present application will be introduced and explained in detail with reference to specific application examples.

[0090] First, the related technology involved in this embodiment is described.

[0091] Pure electric ship power systems have been a hot topic of research in recent years. Compared with traditional fuel ships, they have advantages such as zero emissions, higher transmission efficiency, and low operating costs, but they also have problems such as short cruising range.

[0092] The need to reduce fuel consumption and carbon emissions has led the shipping industry to rediscover the potential of wind propulsion, resulting in an astonishing number and variety of wind-assisted propulsion system (WAPS) projects. Although wind can be somewhat unstable, it is a renewable energy source. In addition, wind energy is always available at zero cost in suitable inland and coastal areas (according to statistics, 70% of the days on a particular route are wind force 4 or above), which provides a certain planning reliability and is no longer subject to the supply and price fluctuations of burning fuel. The most popular and least risky WAPS technology on commercial ships is the rotor sail, also known as the Flytner sail. Installing rotor sails on small ships has achieved a fuel saving of 4.5% through advanced computer control technology, up to 25%. The "Swap2Zero" concept cruise ship has been approved in principle for using a sail propulsion system to provide 50% of the power for the entire ship. The conversion of rotor sails on passenger ships, car ships, multi-purpose ships, bulk carriers and oil tankers is relatively simple.

[0093] According to existing statistics, the maximum speed of ancient sailing ships could reach 20 knots. However, since sailing is greatly affected by the weather conditions at sea, its average speed can only be maintained at 12-16 knots. According to the data currently available, the largest sailing ship in Europe, the "Prussia", is 131.9 meters long, 16.4 meters wide, 8.3 meters deep, and has a full load displacement of 11,330 tons. Based on this, its square coefficient is estimated to be 0.63, which is a very thin ship type in modern times. The "Prussia" uses 5-masted sails for propulsion, and its average speed at sea is 16 knots. The square coefficient of modern bulk carriers, oil tankers and other heavy-duty ships can reach 0.84-0.89, and their sailing resistance will be much greater than that of the "Prussia" when the displacement is the same. According to estimates, if a modern cargo ship with a load capacity of about 8,000 tons adopts a sail propulsion type similar to the "Prussia", its average speed at sea may be only 7-9 knots. Judging from the technical parameters of sailing ships in history, a displacement of 12,000 tons should be the limit of all-sail ships. Today, with the increase in innovation, wind power is expected to provide a higher proportion of power for 10,000-ton bulk carriers.

[0094] At present, the 10,000-ton river-sea bulk carrier fleet is developing well. 10,000-ton river-sea bulk carriers generally carry bulk cargoes such as ore, coal, and grain. These goods are easy to form residual cargo on the bottom of the hold during loading and unloading. If the ship needs to change the cargo, it is necessary to clean the bottom of the hold, and flushing with water will form "hold washing water" containing cargo residues. The "hold washing water" of dry bulk carriers containing cargo residues is ship garbage. In order to avoid environmental pollution, it cannot be discharged at will. When the cargo carried by the ship changes, in order to improve the quality of freight and avoid cargo contamination, the ship needs to be thoroughly washed after unloading in order to carry cargo of different natures. In the process of cleaning the bulk carrier's hold, the use of a large amount of hold washing water consumes a lot of energy; in addition, the frequent adjustment of ballast water during the navigation of bulk carriers also consumes a lot of energy, and energy recovery can be considered.

[0095] As people pay more and more attention to green energy, ship solar power generation technology has gradually become a research hotspot. Solar panels can convert solar radiation into electrical energy, providing clean and reliable energy for ship power systems. Ship solar power generation systems are divided into two types: independent and grid-connected. Independent is usually used in small ships to power auxiliary equipment, while grid-connected is used in large ships, mainly to reduce fuel consumption, which can reduce the emission of pollutants such as carbon dioxide to a certain extent.

[0096] In summary, there is an urgent need for a zero-carbon power system for 10,000-ton river-to-sea bulk carriers that integrates solar energy, energy recovery and wind power.

[0097] Regarding the problems existing in related technologies:

[0098] 1. Against the backdrop of increasingly serious global air pollution and resource shortages, traditional fossil fuel power systems urgently need to transform towards clean energy.

[0099] 2. Currently, there are few measures to effectively utilize renewable wind energy, and ships lack integrated application of clean energy such as wind and light.

[0100] 3. The bulk carrier's tank washing water and ballast water regulation during navigation consume a large amount of water resources and energy, and lack systematic utilization and energy recovery to save energy and reduce emissions.

[0101] Therefore, this embodiment proposes a zero-carbon power system for a 10,000-ton river-sea bulk carrier that is mainly driven by wind power and based on DC networking. On the one hand, electric power is used to propel the ship forward, and a rigid retractable wing sail is installed at the same time, and wind power is directly used to provide power for the 10,000-ton river-sea bulk carrier. Solar panels with a protective layer are added to unobstructed surfaces such as cargo hold covers to supplement power for the DC networking system; on the other hand, tank washing and ballast water regulation consume a lot of energy. The installation of impeller generators on the tank washing water discharge pipes and ballast water pipes and the connection to the DC networking system can achieve energy recovery to a certain extent and contribute to energy conservation and emission reduction.

[0102] Next, the solution of this embodiment is described in detail.

[0103] Reference Figure 2 The present embodiment provides a zero-carbon power system for a 10,000-ton river-to-sea bulk carrier with wind power as the main propulsion system based on DC networking. The system includes a DC bus 1, a DC (direct current) / DC unidirectional converter 2a, 2b, a wing sail detection and adjustment device 3, a rigid retractable wing sail 4, a DC / AC (alternating current) unidirectional converter 5a, 5b, an AC / DC unidirectional converter 5c, an electric motor 6, a clutch 7, a gearbox 8, a propeller 9, a sewage collection tank (sewage ballast tank) 10, a filter screen 11, a valve 12, a turbine generator 13, a centrifugal water pump 14, a shore discharge receiving and processing device (outboard) 15, an emergency generator 16, a solar photovoltaic panel 17, a lithium iron phosphate battery pack 18, a DC / DC bidirectional converter 19a, 19b, and a supercapacitor 20.

[0104] In terms of wind propulsion, the DC bus 1 supplies energy to the wing sail detection and adjustment device 3 through the DC / DC converter 2a. The wing sail detection and adjustment device 3 is equipped with a wind direction and wind force sensor, which can monitor and collect environmental wind information in real time and make automatic adjustments. By changing the orientation, height, inclination and other postures of the rigid retractable wing sail 4, the posture of the rigid retractable wing sail is in the optimal state, providing maximum power for the bulk carrier's navigation. The rigid retractable wing sail 4 is made of a composite material of steel and glass fiber, suspended at a certain distance from the surface of the hull to meet the need for angle adjustment. The bottom of the rigid retractable wing sail 4 is supported by a high-strength alloy rod, which is connected to a spherical base on the hull, and the spherical base exposed from the hull is semicircular. The wing sail detection and adjustment device 3 captures the environmental wind information and determines the optimal posture of the sail after analysis. The spherical base can then rotate 360 ​​degrees horizontally to adjust the direction of the sail. The inclination angle of the wing sail is adjusted by appropriate rotation of the spherical base in the vertical plane. At the same time, the wing sail adopts a multi-segment design from bottom to top and the size decreases evenly from section to section. Electric slide rails are installed between the segments. The segments of the rigid retractable wing sail 4 can be displaced in the vertical direction through the slide rails to adjust the overall height of the rigid retractable wing sail 4, so that the rigid retractable wing sail 4 can be folded and opened through vertical telescoping, thereby increasing the ship's passability, convenience, safety, etc.

[0105] In terms of electric propulsion, the DC bus 1 provides electric energy to the motor 6 through the DC / AC converter 5a. During electric propulsion, the clutch 7 is connected, and the propeller 9 is driven to rotate through the gearbox 8 to provide power for the ship. During electric propulsion, the power source of the DC bus 1 is mainly the lithium iron phosphate battery pack 18 and the super capacitor 20. The lithium iron phosphate battery pack 18 provides a long-term continuous and stable power supply to the ship through the DC / DC bidirectional converter 19b, and the super capacitor 20 meets the instantaneous high power demand of the ship through the DC / DC bidirectional converter 19a, such as quickly increasing the speed.

[0106] In terms of energy management and power distribution, when the wind is good, the rigid retractable wing sail 4 is extended to use wind energy to provide partial power for the ship. The lithium iron phosphate battery pack 18 selects the power supply according to the situation. If the transportation needs to be completed as soon as possible and the destination needs to be reached as soon as possible, a high power output can be selected; if the economic efficiency of navigation and the cruising range are taken into consideration, the lithium iron phosphate battery pack 18 can select medium power output or low power output. In the case of low wind speed or no wind, which is not suitable for using the wing sail, the rigid retractable wing sail 4 is folded. At this time, the lithium iron phosphate battery pack 18 can select full power output according to the actual situation to obtain sufficient power, or appropriately reduce the output power to meet the economic efficiency of navigation and the cruising range.

[0107] In terms of the utilization of tank washing water in bulk carriers, the tank washing water is collected by the sewage collection tank 10. When the sewage is discharged to the shore for treatment, the valve 12 is opened, and the sewage is pumped into the receiving pipe under the action of the centrifugal water pump 14. The filter 11 can filter out large pieces of solid dirt in the sewage to avoid clogging the pipeline. After the sewage enters the receiving pipe, it will drive the turbine generator 13 in the pipeline to rotate and generate electricity. The electric energy is integrated into the DC network through the DC / AC unidirectional converter 5b. After that, the sewage enters the shore receiving and treatment device 15 for centralized treatment and is discharged after meeting the discharge standards.

[0108] In terms of ballast water utilization, when the ballast water is sucked into or discharged from the sewage ballast tank 10, the valve 12 is opened, and the ballast water is pressed in or discharged under the action of the centrifugal water pump 14. In this process, the filter 11 can filter out large solid objects and organisms in the ballast water tank. The flow of ballast water in the pipeline drives the blades in the turbine generator 13 to rotate and generate electricity. The electrical energy is incorporated into the DC network through the AC / DC unidirectional converter 5b to supplement the electrical energy in the DC network.

[0109] In terms of solar energy utilization, solar photovoltaic panels 17 with protective layers are installed on the deck and cargo hold cover of the bulk carrier to convert solar energy into electrical energy and then be incorporated into the DC network through the DC / DC unidirectional converter 2b.

[0110] In terms of backup energy, the ship power system of this embodiment is equipped with an emergency generator 16, which can adopt a variety of energy sources such as LNG (liquefied natural gas), methanol, hydrogen, etc., and has good scalability. It generates electricity through combustion in the emergency generator 16, and the generated electricity is incorporated into the DC bus 1 through the unidirectional AC / DC converter 5c, providing emergency electricity for the ship to ensure emergency power and safety.

[0111] This embodiment has the following technical features:

[0112] Based on the DC networking distribution system, the application of solar energy, methanol / hydrogen power generation, and tank washing water and ballast water call energy recovery in the power system is realized. The electric energy generated by all power supply equipment is first integrated into the DC bus after passing through a bidirectional converter or DC transformer or rectifier. The electric energy used by all electrical equipment comes from the DC bus, realizing the combined utilization of multiple clean energy sources.

[0113] The beneficial effects of this embodiment include at least:

[0114] This embodiment provides a zero-carbon power system for 10,000-ton river-to-sea bulk carriers that is mainly driven by wind power based on DC networking. For river-to-sea bulk carriers on specific routes (rich in wind resources), wind energy can be utilized to the maximum extent. Combined with the characteristics of bulk carriers, the DC networking system can also be used to comprehensively utilize solar energy and energy recovery from tank washing and ballast water regulation, truly realizing a zero-carbon power system that is mainly driven by wind power and supplemented by green electric propulsion, thereby laying the foundation for the development of zero-carbon 10,000-ton bulk carriers.

[0115] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0116] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer modules than shown in the figures, or a combination of certain modules, or different modules.

[0117] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0118] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0119] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A ship power system based on DC networking, characterized in that: The system includes: an energy module, a DC bus, a wind propulsion module, an electric propulsion module and a hydrodynamic recovery module; Wherein, the energy module, the wind propulsion module, the electric propulsion module and the hydrodynamic recovery module are respectively connected to the DC bus; The energy module is used to transmit electric energy to the ship power system through the DC bus; The wind propulsion module is used to convert wind energy into kinetic energy; The electric propulsion model is used to receive the electric energy transmitted by the energy module through the DC bus and convert the received electric energy into kinetic energy; The hydrodynamic recovery module is used to convert the kinetic energy generated by the hydrodynamics into electrical energy, and the converted electrical energy is transmitted to the energy module for storage through the DC bus.

2. A ship power system based on DC networking according to claim 1, characterized in that: The energy module includes a main power module, a backup power module and an energy collection module; Wherein, the main power supply module is used to generate direct current and transmit the generated direct current to the ship power system through the direct current bus; The backup power supply module is used to generate alternating current and convert the generated alternating current into direct current, and then transmit the converted direct current to the ship power system; The energy collection module is used to collect and store renewable energy.

3. A ship power system based on DC networking according to claim 2, characterized in that: The main power module includes a lithium iron phosphate battery pack and a super capacitor; The lithium iron phosphate battery pack is used to generate direct current, and reduce the generated direct current through a first direct current to direct current bidirectional converter, and then continuously output the reduced direct current at a first power through the direct current bus to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module; The supercapacitor is used to generate direct current, and reduce the generated direct current through a second direct current to direct current bidirectional converter, and then output the reduced direct current at a second power through the direct current bus to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module within a set time; the second power is greater than the first power.

4. A ship power system based on DC networking according to claim 2, characterized in that: The backup power module includes an emergency generator; The emergency generator is used to consume at least one of liquefied natural gas, methanol or hydrogen to generate alternating current, and convert the generated alternating current into direct current and reduce the current through an AC to DC unidirectional converter, and then output the obtained direct current to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module through the DC bus.

5. A ship power system based on DC networking according to claim 2, characterized in that: The energy collection module includes a plurality of solar photovoltaic panels; Each of the solar photovoltaic panels is used to convert solar energy into electrical energy, and reduce the current through a first DC to DC unidirectional converter, and then output it to at least one of the wind propulsion module, the electric propulsion module or the hydrodynamic recovery module through the DC bus.

6. A ship power system based on DC networking according to claim 1, characterized in that: The wind propulsion module includes a rigid retractable wingsail and a wingsail detection and adjustment device; the wingsail detection and adjustment device includes a wind direction and wind force sensor; the DC bus is connected to the wingsail detection and adjustment device through a second DC to DC unidirectional converter; Wherein, the wind direction and wind force sensor is used to collect wind parameters; The wingsail detection and adjustment device is used to adjust the posture of the rigid retractable wingsail according to the wind parameters.

7. A ship power system based on DC networking according to claim 1, characterized in that: The alloy rod at the bottom of the rigid retractable wing sail is connected to the spherical base on the hull; The spherical base can be rotated 360 degrees horizontally to adjust the direction of the rigid retractable wing sail; The spherical base is rotatable in a vertical plane to adjust the tilt angle of the rigid retractable wingsail; The rigid retractable wing sail is designed to be multi-segmented from bottom to top, and the size of each segment is uniformly reduced. An electric slide rail is installed between each segment, and the segment can be vertically displaced by the electric slide rail to adjust the height of the rigid retractable wing sail; The wingsail detection and adjustment device is used to adjust the orientation, the tilt angle and the height of the rigid retractable wingsail according to the wind parameters.

8. The ship power system based on DC networking according to claim 1 is characterized in that: The electric propulsion module includes an electric motor, a clutch, a gearbox and a propeller connected in sequence; The DC bus is connected to the motor via a first DC to AC unidirectional converter.

9. A ship power system based on DC networking according to claim 8, characterized in that: When the kinetic energy converted by the wind propulsion module reaches a preset threshold, the energy module is used to output electrical energy to the motor through the DC bus at one of high power, medium power or low power; wherein the high power has a value range of more than 70% of the full power of the energy module, the medium power has a value range of 40% to 70% of the full power of the energy module, and the low power has a value range of less than 40% of the full power of the energy module; When the kinetic energy converted by the wind propulsion module is less than the preset threshold, the energy module is used to output electrical energy to the motor through the DC bus at full power.

10. A ship power system based on DC networking according to any one of claims 1 to 9, characterized in that: The hydrodynamic recovery module includes a turbine generator, a valve, a filter, a sewage collection tank, a water pump, and a shore discharge receiving and processing device; Wherein, the DC bus is connected to the electrical interface of the turbine generator through a second DC to AC unidirectional converter; The first port of the turbine generator is connected to the first end of the valve, the second end of the valve is connected to the sewage collection chamber, and the filter is arranged between the second end of the valve and the sewage collection chamber; The second port of the turbine generator is connected to the first end of the water pump; the second end of the water pump is connected to the shore discharge receiving and processing device.

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