A ship propulsion test platform

Abstract

The application belongs to the technical field of ship propulsion test, and particularly relates to a ship propulsion test platform. The application provides a ship propulsion test platform. The application realizes simulation of various operation conditions of a direct-current networking system and a shaft generator through a direct-current power supply system, an alternating-current power supply system, a load simulation motor, a power generation system and a first main propulsion motor. The application can realize switching of a shaft generator-frequency conversion system and a generator-direct-current networking-electric propulsion test system topology. The application can verify a bottom layer and a logic control program, and verify functions and performance of a towing test verification system.

Description

Technical Field

[0001] This invention belongs to the technical field of ship propulsion testing, and specifically relates to a ship propulsion testing platform. Background Technology

[0002] Ship propulsion methods include two types: mechanical propulsion and integrated electric propulsion. Mechanical propulsion is a method in which a prime mover, such as a gas engine or diesel engine, directly drives the propeller through a gearbox and shaft system. Integrated electric propulsion combines the traditionally independent mechanical propulsion system and the electrical system into a single system, utilizing the ship's power station to provide propulsion power, auxiliary machinery, and daily electricity to the entire ship. Compared with traditional mechanical propulsion, integrated electric propulsion has advantages such as flexible layout, efficient use of space, flexible maneuverability, good maneuverability, low life-cycle cost, less maintenance, easier attainment of ideal towing characteristics, low vibration and noise, and a more comfortable environment, making it one of the mainstream trends in ship power development.

[0003] DC-powered integrated electric propulsion systems are one of the important development directions for integrated electric propulsion systems in ships, and their applications are becoming increasingly widespread. However, existing ship propulsion test platforms have limited functionality and cannot meet the testing requirements for various scenarios in ship propulsion experiments. Summary of the Invention

[0004] To address the aforementioned technical problems, this application proposes a ship propulsion test platform. This application utilizes a DC power supply system, an AC power supply system, a load simulation motor, a generator system, and a first main propulsion motor to simulate various operating conditions of a DC grid system and a shaft-driven generator. Furthermore, it can switch between test system topologies of shaft-driven generator-frequency converter system and generator-DC grid-electric propulsion system. This test platform allows for the verification of the underlying layer and logic control program, and verifies the system's functionality and performance through towing tests.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application is a ship propulsion test platform, comprising: a DC power supply system, an AC power supply system, a load simulation motor, a power generation system, and a first main propulsion motor; the DC power supply system is electrically connected to the terminals of the first main propulsion motor and to one end of the power generation system, for storing the electrical energy generated by the power generation system and supplying power to the first main propulsion motor; the DC power supply system is also used to supply power to the power generation system; the AC power supply system is electrically connected to the other end of the power generation system, for supplying power to the power generation system; the rotating shaft of the load simulation motor is drive-connected to the rotating shaft of the first main propulsion motor or to the power generation system, for simulating load in ship propulsion tests; the terminals of the load simulation motor are electrically connected to the AC power supply system, for returning the electrical energy generated during load simulation to the AC power supply system.

[0006] In some embodiments, the power generation system includes: a second main push motor, a gearbox, and a shaft-driven generator; the gearbox includes: an input terminal, a first output terminal, and a second output terminal; the wiring terminal of the second main push motor is electrically connected to the AC power system, and the rotating shaft of the second main push motor is drivenly connected to the input terminal of the gearbox for driving the gearbox to rotate; the second output terminal of the gearbox is drivenly connected to the rotating shaft of the shaft-driven generator; the wiring terminal of the shaft-driven generator is electrically connected to the DC power system for charging the DC power system or using the electrical energy of the DC power system.

[0007] In some embodiments, when the load simulation motor is connected to the power generation system, the rotating shaft of the load simulation motor is connected to the first output end of the gearbox for simulating the load during shaft-driven power generation.

[0008] In some embodiments, when the load simulation motor is connected to the first main propulsion motor, the load simulation motor is used to simulate the main propulsion load.

[0009] In some embodiments, the AC power system includes: an AC power supply and a frequency converter; the frequency converter includes: a first connection terminal, a second connection terminal, and a third connection terminal; the first connection terminal is electrically connected to the AC power supply for obtaining electrical energy from the AC power supply and returning the electrical energy generated by the load simulated motor to the AC power supply; the second connection terminal is electrically connected to the power generation system for providing electrical energy to the power generation system; the third connection terminal is electrically connected to the load simulated motor for receiving the electrical energy generated by the load simulated motor.

[0010] In some embodiments, the frequency converter includes: a first switch M1, a second switch M2, an LCL filter, a first four-quadrant module U21, a second four-quadrant module U22, and a third four-quadrant module U23; a first terminal of the first switch M1 is electrically connected to the power generation system, and a second terminal of the first switch M1 is electrically connected to a first terminal of the second four-quadrant module U22; a second terminal of the second four-quadrant module U22 is electrically connected to a first terminal of the first four-quadrant module U21; a second terminal of the first four-quadrant module U21 is electrically connected to a first terminal of the LCL filter; a second terminal of the LCL filter is electrically connected to the AC power supply; a first terminal of the second switch M2 is electrically connected to the terminal of the load simulating motor, and a second terminal of the second switch M2 is electrically connected to a first terminal of the third four-quadrant module U23; a second terminal of the third four-quadrant module U23 is electrically connected to a second terminal of the second four-quadrant module U22.

[0011] In some embodiments, the DC power supply system includes: a DC power supply and a DC distribution board; the DC distribution board includes: a fourth connection terminal, a fifth connection terminal, and a sixth connection terminal; the fourth connection terminal is electrically connected to the DC power supply for receiving electrical energy from the DC power supply and inputting electrical energy generated by the power generation system into the DC power supply; the fifth connection terminal is electrically connected to the first main push motor for supplying power to the first main push motor; the sixth connection terminal is electrically connected to the power generation system for receiving electrical energy generated by the power generation system.

[0012] In some embodiments, the DC power supply includes: a first shore power junction box, a second shore power junction box, a lithium battery high-voltage box, and a supercapacitor high-voltage box.

[0013] In some embodiments, the DC power distribution board includes: a third switch M3, a fourth switch M4, a fifth switch M5, a sixth switch M6, a seventh switch M7, an eighth switch M8, a first DC bus B1, a second DC bus B2, a fourth four-quadrant module U24, a fifth four-quadrant module U25, a first DC / DC module U11, a second DC / DC module U12, a first fuse FU1, a second fuse FU2, a third fuse FU3, a fourth fuse FU4, a fifth fuse FU5, a sixth fuse FU6, a seventh fuse FU7, and an eighth fuse FU8; the first terminal of the third switch M3 is electrically connected to the lithium battery high-voltage box, and the third switch M4... The second terminal of the third fuse FU3 is electrically connected to the first terminal of the first DC / DC module U11; the second terminal of the first DC / DC module U11 is electrically connected to the first terminal of the first fuse FU1; the second terminal of the first fuse FU1 is electrically connected to the first DC bus B1; the first terminal of the fourth switch M4 is electrically connected to the first shore power junction box; the second terminal of the fourth switch M4 is electrically connected to the first terminal of the second fuse FU2; the second terminal of the second fuse FU2 is electrically connected to the first DC bus B1; the first terminal of the third fuse FU3 is electrically connected to the second DC bus B2; the second terminal of the third fuse FU3 is connected to the fifth quadrant. The first terminal of module U25 is electrically connected; the second terminal of the fifth four-quadrant module U25 is electrically connected to the first terminal of the fifth switch M5, and the second terminal of the fifth switch M5 is electrically connected to the wiring terminal of the first main push motor; the first terminal of the sixth switch M6 is electrically connected to the supercapacitor voltage box; the second terminal of the sixth switch M6 is electrically connected to the first terminal of the second DC / CD module; the second terminal of the second DC / DC module U12 is electrically connected to the first terminal of the fourth fuse FU4; the second terminal of the fourth fuse FU4 is electrically connected to the second DC bus B2; the first terminal of the seventh switch M7 is electrically connected to the second shore power junction box, and the seventh switch... The second end of M7 is electrically connected to the first end of the fifth fuse FU5; the second end of the fifth fuse FU5 is electrically connected to the second DC bus B2; the first end of the sixth fuse FU6 is electrically connected to the second DC bus B2, and the second end of the sixth fuse FU6 is electrically connected to the first end of the fourth quadrant module U24; the second end of the fourth quadrant module U24 is electrically connected to the power generation system; the first end of the seventh fuse FU7 is electrically connected to the first DC bus B1, and the second end of the seventh fuse FU7 is electrically connected to the first end of the eighth fuse FU8; the second end of the eighth fuse FU8 is electrically connected to the second DC bus B2.

[0014] The beneficial effects of this invention are as follows: This application can not only simulate various operating conditions of DC grid systems and shaft-driven generators, but also realize the switching of test system topology between shaft-driven generator-frequency conversion system and generator-DC grid-electric propulsion. Through this test platform, the underlying and logic control programs can be verified, and the functions and performance of the system can be verified through towing tests. Attached Figure Description

[0015] The scope of this disclosure can be better understood by reading the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. The accompanying drawings are:

[0016] Figure 1 A schematic diagram of the overall structure of a ship propulsion test platform provided in this application embodiment;

[0017] Figure 2 A circuit diagram of a DC power supply system provided in an embodiment of this application;

[0018] Figure 3 A circuit diagram of an AC power supply system provided in an embodiment of this application;

[0019] Figure 4 This is a circuit diagram of a ship propulsion test platform provided in an embodiment of this application.

[0020] In the diagram, 100-DC power supply system, 101-DC power supply, 102-DC distribution board, 103-fourth connection terminal, 104-sixth connection terminal, 105-fifth connection terminal, 200-generator system, 201-shaft-driven generator, 202-second main drive motor, 203-gearbox, 300-AC power supply system, 301-AC power supply, 302-frequency converter, 400-load simulation motor, 500-first main drive motor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0023] If the application documents contain similar descriptions such as "first, second, third", the following explanation shall be added: In the following description, the terms "first, second, third" are used only to distinguish similar objects and do not represent a specific order of objects. It is understood that "first, second, third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0025] Example 1:

[0026] In view of the problems existing in the background technology, such as Figure 1 As shown, this application provides a ship propulsion test platform. The ship propulsion test platform includes: a DC power supply system 100, an AC power supply system 300, a load simulation motor 400, a power generation system 200, and a first main propulsion motor 500.

[0027] The DC power supply system 100 is electrically connected to the terminals of the first main propulsion motor 500 and to one end of the power generation system 200, for storing the electrical energy generated by the power generation system 200 and supplying power to the first main propulsion motor 500. The DC power supply system 100 also supplies power to the power generation system 200. The AC power supply system 300 is electrically connected to the other end of the power generation system 200, for supplying power to the power generation system 200. The rotating shaft of the load simulation motor 400 is drive-connected to the rotating shaft of the first main propulsion motor 500 or to the power generation system 200, for simulating loads during ship propulsion tests. Figure 1 The two dashed lines represent two connection methods for the load simulation motor 400. The terminals of the load simulation motor 400 are electrically connected to the AC power system 300 to return the electrical energy generated during load simulation to the AC power system 300.

[0028] In some embodiments, when the load simulation motor 400 is connected to the power generation system 200, the rotating shaft of the load simulation motor 400 is connected to the first output end of the gearbox 203 for simulating the load during shaft-driven power generation.

[0029] In some embodiments, when the load simulation motor 400 is connected to the first main propulsion motor 500, the load simulation motor 400 is used to simulate the main propulsion load.

[0030] The test platform mentioned in this application conducts ship propulsion tests under various conditions. The connection method of the load simulation motor 400 can be changed to achieve ship propulsion in different operating modes. When the load simulation motor 400 is connected to the power generation system 200, it simulates the load during shaft-driven power generation. The AC power system 300 in this application simulates the ship's prime mover. When the ship is driven only by the prime mover, the remaining power from the prime mover can be converted into electrical energy by the power generation system 200 and stored in the DC power system 100. In this case, when the ship requires greater energy for propulsion, the electrical energy in the DC power system 100 can be supplied to the load simulation motor 400 to improve the overall propulsion capability of the ship.

[0031] When the load simulation motor 400 is connected to the first main propulsion motor 500, the load simulation motor 400 is used to simulate the main propulsion load. At this time, the ship is driven only by the DC power system 100. Since this is an experiment, to avoid unnecessary energy waste during the experiment, a generator is used as the simulated load in this application. The electrical energy generated by the generator during the simulated load process can also be fed back to the AC power system 300, thus avoiding energy waste during the experiment.

[0032] Therefore, the ship propulsion test platform mentioned in this application can not only simulate various operating conditions of the DC grid system and the shaft generator 201, but also realize the switching of the test system topology of shaft generator 201-frequency conversion system and generator-DC grid-electric propulsion. Through this test platform, the underlying and logic control programs can be verified, and the functions and performance of the system can be verified through experiments.

[0033] Example 2:

[0034] like Figure 2 As shown, in some embodiments, the DC power supply system 100 includes a DC power supply 101 and a DC distribution board 102. The DC distribution board 102 includes a fourth connection terminal 103, a fifth connection terminal 105, and a sixth connection terminal 104.

[0035] The fourth connection terminal 103 is electrically connected to the DC power supply 101 for receiving electrical energy from the DC power supply 101 and inputting electrical energy generated by the power generation system 200 into the DC power supply 101. The fifth connection terminal 105 is electrically connected to the first main push motor 500 for supplying power to the first main push motor 500. The sixth connection terminal 104 is electrically connected to the power generation system 200 for receiving electrical energy generated by the power generation system 200.

[0036] In some embodiments, the DC power supply 101 includes: a first shore power junction box, a second shore power junction box, a lithium battery high-voltage box, and a supercapacitor high-voltage box.

[0037] In some embodiments, the DC distribution board 102 includes: a third switch M3, a fourth switch M4, a fifth switch M5, a sixth switch M6, a seventh switch M7, an eighth switch M8, a first DC bus B1, a second DC bus B2, a fourth quadrant module U24, a fifth quadrant module U25, a first DC / DC module U11, a second DC / DC module U12, a first fuse FU1, a second fuse FU2, a third fuse FU3, a fourth fuse FU4, a fifth fuse FU5, a sixth fuse FU6, a seventh fuse FU7, and an eighth fuse FU8.

[0038] The first terminal of the third switch M3 is electrically connected to the lithium battery high-voltage box, and the second terminal of the third switch M3 is electrically connected to the first terminal of the first DC / DC module U11. The second terminal of the first DC / DC module U11 is electrically connected to the first terminal of the first fuse FU1. The second terminal of the first fuse FU1 is electrically connected to the first DC bus B1. The first terminal of the fourth switch M4 is electrically connected to the first shore power junction box, and the second terminal of the fourth switch M4 is electrically connected to the first terminal of the second fuse FU2. The second terminal of the second fuse FU2 is electrically connected to the first DC bus B1. The first terminal of the third fuse FU3 is electrically connected to the second DC bus B2. The second terminal of the third fuse FU3 is electrically connected to the first terminal of the fifth quadrant module U25. The second terminal of the fifth quadrant module U25 is electrically connected to the first terminal of the fifth switch M5, and the second terminal of the fifth switch M5 is electrically connected to the terminal of the first main push motor 500.

[0039] The first terminal of the sixth switch M6 is electrically connected to the supercapacitor voltage box. The second terminal of the sixth switch M6 is electrically connected to the first terminal of the second DC / CD module. The second terminal of the second DC / DC module U12 is electrically connected to the first terminal of the fourth fuse FU4. The second terminal of the fourth fuse FU4 is electrically connected to the second DC bus B2. The first terminal of the seventh switch M7 is electrically connected to the second shore power junction box, and the second terminal of the seventh switch M7 is electrically connected to the first terminal of the fifth fuse FU5. The second terminal of the fifth fuse FU5 is electrically connected to the second DC bus B2. The first terminal of the sixth fuse FU6 is electrically connected to the second DC bus B2, and the second terminal of the sixth fuse FU6 is electrically connected to the first terminal of the fourth quadrant module U24. The second terminal of the fourth quadrant module U24 is electrically connected to the power generation system 200.

[0040] The first terminal of the seventh fuse FU7 is electrically connected to the first DC bus B1, and the second terminal of the seventh fuse FU7 is electrically connected to the first terminal of the eighth fuse FU8. The second terminal of the eighth fuse FU8 is electrically connected to the second DC bus B2.

[0041] The DC power supply 101 in this embodiment includes a plurality of energy storage devices and shore power junction boxes, with one energy storage device and one shore power junction box constituting one DC power supply 101. Furthermore, the DC power supplies 101 in the auxiliary sets are powered through multiple interconnected busbars. This arrangement ensures that if one section of the DC busbar fails, the remaining sections of the DC busbar can still operate. Each DC power supply 101 is connected to its corresponding DC busbar and multiple busbar sections via fast-acting fuses to ensure selective protection within the integrated DC frequency converter and distribution device. This enhances the overall safety of the test platform.

[0042] Example 3:

[0043] like Figure 3 As shown, in some embodiments, the AC power system 300 includes an AC power supply 301 and a frequency converter 302. The frequency converter 302 includes a first connection terminal, a second connection terminal, and a third connection terminal.

[0044] The first connection terminal is electrically connected to the AC power supply 301 and is used to obtain electrical energy from the AC power supply 301 and return the electrical energy generated by the load analog motor 400 to the AC power supply 301.

[0045] The second connection terminal is electrically connected to the power generation system 200 and is used to provide power to the power generation system 200.

[0046] The third connection terminal is electrically connected to the load simulation motor 400 and is used to receive the electrical energy generated by the load simulation motor 400.

[0047] In some embodiments, the frequency converter 302 includes: a first switch M1, a second switch M2, an LCL filter, a first four-quadrant module U21, a second four-quadrant module U22, and a third four-quadrant module U23.

[0048] The first terminal of the first switch M1 is electrically connected to the power generation system 200, and the second terminal of the first switch M1 is electrically connected to the first terminal of the second four-quadrant module U22. The second terminal of the second four-quadrant module U22 is electrically connected to the first terminal of the first four-quadrant module U21. The second terminal of the first four-quadrant module U21 is electrically connected to the first terminal of the LCL filter. The second terminal of the LCL filter is electrically connected to the AC power supply 301. The first terminal of the second switch M2 is electrically connected to the terminal of the load analog motor 400, and the second terminal of the second switch M2 is electrically connected to the first terminal of the third four-quadrant module U23. The second terminal of the third four-quadrant module U23 is electrically connected to the second terminal of the second four-quadrant module U22.

[0049] The terminals of the load simulation motor 400 are electrically connected to the AC power system 300, and are used to return the electrical energy generated during the simulated load to the AC power system 300.

[0050] In this embodiment, the AC power system 300 simulates the prime mover on a ship. To avoid energy waste, AC power 301 is used for simulation in this application. Similarly, the frequency converter 302 in the AC power system 300 can complete the power generation of the load simulating the motor 400, further avoiding energy waste.

[0051] Example 4:

[0052] In some embodiments, the power generation system 200 includes: a second main drive motor 202, a gearbox 203, and a shaft-driven generator 201. The gearbox 203 includes: an input terminal, a first output terminal, and a second output terminal.

[0053] The terminals of the second main push motor 202 are electrically connected to the AC power system 300, and the rotating shaft of the second main push motor 202 is connected to the input terminal of the gearbox 203 for driving the gearbox 203 to rotate.

[0054] The second output end of the gearbox 203 is connected to the rotating shaft of the shaft-driven generator 201.

[0055] The terminals of the shaft-driven generator 201 are electrically connected to the DC power system 100, and are used to charge the DC power system 100 or use the electrical energy of the DC power system 100.

[0056] The second main propulsion motor 202 serves as the primary drive motor in shaft-driven power generation mode, and is therefore directly driven by the prime mover, i.e., the AC power system 300 in this application. The second main propulsion motor 202 then inputs energy into the gearbox 203, where energy is distributed. Therefore, when the load simulation motor 400 is connected to the first output terminal of the gearbox 203, a portion of the energy input into the gearbox 203 is used to drive the ship's movement, while the other portion is converted into electrical energy by the shaft-driven generator 201 and stored in the DC power system 100. When a larger amount of energy is required, the shaft-driven generator 201 can also be used as a third main propulsion motor, inputting the DC power system 100 into the gearbox 203 to drive the ship's movement together with the AC power system 300.

[0057] Example 5:

[0058] like Figure 4 As shown, this embodiment, in conjunction with Embodiments 1-4, explains some of the usage methods of a ship propulsion test platform described in this solution during ship propulsion tests.

[0059] When the load simulation motor 400 is connected to the gearbox 203, the load simulation motor 400 simulates a shaft-driven power generation load. At this time, the DC power system 100 can also be divided into charging mode and discharging mode based on the energy input direction.

[0060] In the charging mode of the DC power supply system 100, the AC power from the AC power supply 301 is converted into DC power through the first four-quadrant module U21. This DC power is then output to the second main drive motor 202 via the second four-quadrant module U22, causing the second main drive motor 202 to rotate. Since the rotating shaft of the second main drive motor 202 is connected to the gearbox 203, and the rotating shafts of the load simulation motor 400 and the shaft-driven generator 201 are also connected to the gearbox 203, part of the kinetic energy generated by the second main drive motor 202 is used to drive the shaft-driven generator 201, and the other part is used to drive the load simulation motor 400. The load simulation motor 400 generates electrical energy during rotation. To avoid wasting this energy, the electrical energy generated by the load simulation motor 400 is input to the intermediate DC link of the frequency converter 302 via the third four-quadrant module U23. The electrical energy generated by the shaft generator 201 is input into the second DC bus B2 through the fourth quadrant module U24, and finally charges the lithium battery high-voltage box and the super battery high-voltage box through the first DC / DC module U11 and the second DC / DC module U12 respectively.

[0061] When the DC power supply system 100 is in discharge mode, all the kinetic energy generated by the second main drive motor 202 is used to drive the load simulation motor 400. At the same time, the DC power in the DC power supply 101 enters the first DC bus B1 and the second DC bus B2 through the first DC / DC module U11 and the second DC / DC module U12, and finally delivers the DC power to the shaft generator 201 through the fourth quadrant module U24, driving the shaft generator 201 to rotate, thereby realizing the dual power source drive of the load simulation motor 400.

[0062] When the load simulation motor 400 is connected to the first main drive motor 500, it can be selected whether the AC power system 300 is needed to drive the load simulation motor 400 simultaneously, depending on actual needs. When the AC power system 300 is needed to drive the load simulation motor 400, all the kinetic energy output by the second main drive motor 202 will be converted into electrical energy by the shaft generator 201 and supplied to the first main drive motor 500. At the same time, the DC power output by the DC power supply 101 passes through the first DC / DC module U11 and the second DC / DC module U12 to reach the first DC module and the second DC bus B2, and then is output to the first main drive motor 500 by the fifth quadrant module U25, thereby driving the load simulation motor 400.

[0063] Therefore, this application realizes various operating conditions of the simulated DC grid system and shaft-driven generator, and can realize the switching of the test system topology of shaft-driven generator-frequency conversion system and generator-DC grid-electric propulsion. Through this test platform, the underlying and logic control programs can be verified, and the functions and performance of the system can be verified through towing tests.

[0064] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. The sequence numbers of the above-described embodiments are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0065] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0066] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0067] In addition, each functional unit in the various embodiments of this application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0068] The above description is merely an embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A ship propulsion test platform, characterized in that include: DC power supply system, AC power supply system, load simulation motor, power generation system, first main propulsion motor; The DC power supply system is electrically connected to the terminal of the first main push motor and to one end of the power generation system, and is used to store the electrical energy generated by the power generation system and to supply power to the first main push motor. The DC power supply system is also used to supply power to the power generation system; The AC power system is electrically connected to the other end of the power generation system and is used to supply power to the power generation system. The rotating shaft of the load simulation motor is connected to the rotating shaft of the first main propulsion motor or to the power generation system for simulating load in ship propulsion tests. The terminals of the load simulation motor are electrically connected to the AC power system, and are used to return the electrical energy generated during the simulated load to the AC power system. The power generation system includes: a second main propulsion motor, a gearbox, and a shaft-driven generator; the gearbox includes: an input terminal, a first output terminal, and a second output terminal. The terminals of the second main push motor are electrically connected to the AC power system, and the rotating shaft of the second main push motor is connected to the input end of the gearbox for driving the gearbox to rotate. The second output end of the gearbox is connected to the rotating shaft of the shaft-driven generator. The terminals of the shaft-driven generator are electrically connected to the DC power system for charging the DC power system or using the electrical energy of the DC power system.

2. A marine propulsion test platform according to claim 1, characterised in that, When the load simulation motor is connected to the power generation system, the rotating shaft of the load simulation motor is connected to the first output end of the gearbox to simulate the load when generating electricity from a shaft.

3. A marine propulsion test platform according to claim 1, characterized in that When the load simulation motor is connected to the first main propulsion motor, the load simulation motor is used to simulate the main propulsion load.

4. A marine propulsion test platform according to claim 1, characterized in that The AC power system includes: an AC power supply and a frequency converter; the frequency converter includes: a first connection terminal, a second connection terminal and a third connection terminal; The first connection terminal is electrically connected to the AC power source and is used to obtain electrical energy from the AC power source and return the electrical energy generated by the load simulated motor to the AC power source. The second connection terminal is electrically connected to the power generation system and is used to provide electrical energy to the power generation system; The third connection terminal is electrically connected to the load simulation motor and is used to receive the electrical energy generated by the load simulation motor.

5. A marine propulsion test platform according to claim 4, characterised in that, The frequency converter includes: a first switch M1, a second switch M2, an LCL filter, a first four-quadrant module U21, a second four-quadrant module U22, and a third four-quadrant module U23; The first terminal of the first switch M1 is electrically connected to the power generation system, and the second terminal of the first switch M1 is electrically connected to the first terminal of the second four-quadrant module U22; the second terminal of the second four-quadrant module U22 is electrically connected to the first terminal of the first four-quadrant module U21; the second terminal of the first four-quadrant module U21 is electrically connected to the first terminal of the LCL filter; the second terminal of the LCL filter is electrically connected to the AC power supply; the first terminal of the second switch M2 is electrically connected to the terminal of the load simulated motor, and the second terminal of the second switch M2 is electrically connected to the first terminal of the third four-quadrant module U23; the second terminal of the third four-quadrant module U23 is electrically connected to the second terminal of the second four-quadrant module U22.

6. A ship propulsion test platform according to claim 1, characterized in that, The DC power supply system includes: a DC power supply and a DC distribution board; the DC distribution board includes: a fourth connection terminal, a fifth connection terminal and a sixth connection terminal; The fourth connection terminal is electrically connected to the DC power supply for receiving electrical energy from the DC power supply and inputting electrical energy generated by the power generation system into the DC power supply. The fifth connection terminal is electrically connected to the first main push motor and is used to supply power to the first main push motor. The sixth connection terminal is electrically connected to the power generation system and is used to receive electrical energy generated by the power generation system.

7. A ship propulsion test platform according to claim 6, characterized in that, The DC power supply includes: a first shore power junction box, a second shore power junction box, a lithium battery high-voltage box, and a supercapacitor high-voltage box.

8. A ship propulsion test platform according to claim 7, characterized in that, The DC distribution board includes: a third switch M3, a fourth switch M4, a fifth switch M5, a sixth switch M6, a seventh switch M7, an eighth switch M8, a first DC bus B1, a second DC bus B2, a fourth quadrant module U24, a fifth quadrant module U25, a first DC / DC module U11, a second DC / DC module U12, a first fuse FU1, a second fuse FU2, a third fuse FU3, a fourth fuse FU4, a fifth fuse FU5, a sixth fuse FU6, a seventh fuse FU7, and an eighth fuse FU8. The first terminal of the third switch M3 is electrically connected to the lithium battery high-voltage box, and the second terminal of the third switch M3 is electrically connected to the first terminal of the first DC / DC module U11; the second terminal of the first DC / DC module U11 is electrically connected to the first terminal of the first fuse FU1; the second terminal of the first fuse FU1 is electrically connected to the first DC bus B1; the first terminal of the fourth switch M4 is electrically connected to the first shore power junction box, and the second terminal of the fourth switch M4 is electrically connected to the first terminal of the second fuse FU2; the second terminal of the second fuse FU2 is electrically connected to the first DC bus B1; the first terminal of the third fuse FU3 is electrically connected to the second DC bus B2; the second terminal of the third fuse FU3 is electrically connected to the first terminal of the fifth quadrant module U25; the second terminal of the fifth quadrant module U25 is electrically connected to the first terminal of the fifth switch M5, and the second terminal of the fifth switch M5 is electrically connected to the terminal of the first main push motor; The first terminal of the sixth switch M6 is electrically connected to the supercapacitor voltage box; the second terminal of the sixth switch M6 is electrically connected to the first terminal of the second DC / CD module; the second terminal of the second DC / DC module U12 is electrically connected to the first terminal of the fourth fuse FU4; the second terminal of the fourth fuse FU4 is electrically connected to the second DC bus B2; the first terminal of the seventh switch M7 is electrically connected to the second shore power junction box; the second terminal of the seventh switch M7 is electrically connected to the first terminal of the fifth fuse FU5; the second terminal of the fifth fuse FU5 is electrically connected to the second DC bus B2; the first terminal of the sixth fuse FU6 is electrically connected to the second DC bus B2; the second terminal of the sixth fuse FU6 is electrically connected to the first terminal of the fourth quadrant module U24; the second terminal of the fourth quadrant module U24 is electrically connected to the power generation system. The first end of the seventh fuse FU7 is electrically connected to the first DC bus B1, and the second end of the seventh fuse FU7 is electrically connected to the first end of the eighth fuse FU8; the second end of the eighth fuse FU8 is electrically connected to the second DC bus B2.

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