A method, system, device and medium for controlling seawater flow of a ship

Abstract

The present application discloses a method, system, device, and medium for controlling seawater flow rate of a ship, which relates to the field of ship technology. The method comprises: obtaining the ship's speed information, draft, and output power of the power unit, and determining real-time operating condition information based on the speed information, draft, and output power; determining the operating condition type, and under each operating condition type, adjusting the control valve opening of the flow control valve and the speed of the seawater pump to different combination parameters, and determining the seawater flow rate corresponding to each combination parameter; obtaining the temperature difference at the water inlet and outlet of the ship's cooling unit under each combination parameter, obtaining the rate of change of the ship's speed information, draft, and output power, and adjusting the control valve opening and seawater pump speed in the current combination parameter. The present application can enable the seawater pump flow rate to reach the seawater flow rate required at the current moment without affecting the current operating condition, thereby realizing active regulation of the ship's seawater flow rate and improving the safety of the ship.

Description

Technical Field

[0001] The present application relates to the field of ship technology, and in particular to a method, system, equipment and medium for controlling seawater flow in a ship. Background Art

[0002] The ship's seawater control system is used to control the ship's seawater flow rate and provide sufficient seawater for heat exchange or other equipment of important ship equipment. Specifically, it provides cooling water for equipment with water cooling requirements in the power system and removes the heat generated by the power system to ensure the safe and normal operation of the power system. In addition, it is also used to provide seawater to the water generation system.

[0003] In the related art, the ship's seawater cooling system is mostly passively regulated. That is, when the freshwater outlet temperature of the central cooler deviates from the set value of the control system, the frequency converter adjusts the seawater pump speed to increase or decrease, so that the freshwater outlet temperature of the central cooler returns to the set value. When the ship's heat load changes greatly or the seawater temperature changes greatly, the passive regulation method will have a certain degree of regulation lag, which will affect the safe operation of the ship's system. This control method in the related art is expensive and requires the installation of various sensor devices to improve the speed and safety and reliability of automatic control. Due to the large number of designed sensors, relatively independent control devices need to be set up, which will lead to increased management, maintenance, and maintenance costs. Once the accuracy of some sensors decreases, a certain degree of regulation lag will occur. When the operating conditions of the ship change, it will affect the safe operation of the ship's system.

[0004] Therefore, there is currently a lack of a ship seawater flow control method that is efficient, reliable, low-cost and adaptable to different operating conditions. Summary of the Invention

[0005] The present application provides a method, system, device, and medium for controlling seawater flow on a ship, which are used to address the deficiencies in the above-mentioned related technologies. The technical solutions are as follows:

[0006] In a first aspect, an embodiment of the present application provides a method for controlling seawater flow rate of a ship, which is applied to a ship seawater flow control system, wherein the ship seawater flow control system includes a flow control valve and a seawater pump. The method includes:

[0007] Acquiring speed information, draft, and output power of a power unit of the ship, and determining real-time operating condition information of the ship based on the speed information, the draft, and the output power;

[0008] determining an operating condition type based on the real-time operating condition information, and adjusting the control valve opening of the flow control valve and the speed of the seawater pump to different combination parameters of the control valve opening and the seawater pump speed under each operating condition type, and determining the seawater flow rate corresponding to each combination parameter;

[0009] Obtaining the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit under each of the combination parameters, and obtaining the speed information, draft, and rate of change of the output power of the ship under each of the combination parameters;

[0010] The control valve opening and the seawater pump speed in the current combined parameters are adjusted according to the ratio of the temperature difference to the preset temperature difference threshold and the ratio of the change rate to the change rate threshold.

[0011] In an optional solution of the first aspect, the method further includes:

[0012] Acquire historical data of the ship in each operating condition, wherein the historical data includes historical speed information, historical draft, and historical output power under the corresponding operating condition;

[0013] and determining the control valve opening range of the flow control valve and the seawater pump speed range of the seawater pump under each of the operating conditions, obtaining the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship's cooling unit, and obtaining the speed information, draft, and rate of change of the output power of the ship under each of the combined parameters;

[0014] When the temperature difference is not greater than a preset temperature difference threshold and the rate of change is not greater than a preset rate of change threshold, determining an upper limit of the seawater flow rate under the corresponding operating condition type; when the temperature difference is greater than the preset temperature difference threshold and the rate of change is greater than the preset rate of change threshold, determining a lower limit of the seawater flow rate under the corresponding operating condition type;

[0015] After determining the operating condition type based on the real-time operating condition information, the method further includes:

[0016] The seawater flow rate corresponding to each of the combination parameters is between the seawater flow rate upper limit and the seawater flow rate lower limit.

[0017] In an optional solution of the first aspect, the method further includes:

[0018] A plurality of combination parameters of control valve openings and seawater pump speeds are preset, and the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit under each of the combination parameters is obtained respectively, and the speed information, draft and rate of change of the output power of the ship under each of the combination parameters are obtained; with the range of seawater flow under each operating condition type determined in the historical data as a constraint condition, a critical combination parameter that satisfies the constraint condition is calculated through linear programming, and the ship seawater flow control system is adjusted based on the critical combination parameter.

[0019] In an optional solution of the first aspect, the method further includes:

[0020] The control valve opening and the seawater pump speed in the critical combination parameters are adjusted by a fuzzy control method, and the control parameters of the fuzzy control are adjusted based on the target seawater flow, the real-time temperature difference and the real-time change rate.

[0021] In a second aspect, an embodiment of the present application further provides a ship seawater flow control system, the ship seawater flow control system comprising a flow control valve and a seawater pump, the system further comprising:

[0022] a data acquisition unit, configured to acquire speed information, draft, and output power of a power unit of the ship, and determine real-time operating condition information of the ship based on the speed information, draft, and output power;

[0023] a flow calculation unit, configured to determine an operating condition type based on the real-time operating condition information, and, under each operating condition type, adjust the control valve opening of the flow control valve and the speed of the seawater pump to different combination parameters of the control valve opening and the seawater pump speed, and determine the seawater flow rate corresponding to each combination parameter;

[0024] a control unit, configured to obtain a temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit under each of the combined parameters, and obtain speed information, draft, and a rate of change of the output power of the ship under each of the combined parameters;

[0025] The control unit is further configured to adjust the control valve opening and the seawater pump speed in the current combined parameters according to the ratio of the temperature difference to the preset temperature difference threshold and the ratio of the change rate to the change rate threshold.

[0026] In an optional solution of the second aspect, the system further includes:

[0027] The flow calculation unit is further used to obtain historical data of the ship in each operating condition type, wherein the historical data includes historical speed information, historical draft and historical output power under the corresponding operating condition type;

[0028] The flow calculation unit is further used to determine the control valve opening range of the flow control valve and the seawater pump speed range of the seawater pump under each of the operating conditions, and obtain the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit, and obtain the speed information, draft and output power change rate of the ship under each of the combined parameters;

[0029] The flow calculation unit is further configured to determine an upper limit of the seawater flow rate under a corresponding operating condition when the temperature difference is not greater than a preset temperature difference threshold and the rate of change is not greater than a preset rate of change threshold; and determine a lower limit of the seawater flow rate under a corresponding operating condition when the temperature difference is greater than the preset temperature difference threshold and the rate of change is greater than the preset rate of change threshold;

[0030] After determining the operating condition type based on the real-time operating condition information, the flow calculation unit determines that the seawater flow corresponding to each of the combined parameters is between the seawater flow upper limit and the seawater flow lower limit.

[0031] In an optional solution of the second aspect, the system further includes:

[0032] The control unit is further used to preset a plurality of combination parameters of control valve openings and seawater pump speeds, respectively obtain the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit under each of the combination parameters, and obtain the speed information, draft and rate of change of the output power of the ship under each of the combination parameters; using the range of seawater flow under each operating condition type determined in the historical data as a constraint condition, calculate the critical combination parameter that satisfies the constraint condition through linear programming, and adjust the ship seawater flow control system based on the critical combination parameter.

[0033] In an optional solution of the second aspect, the system further includes:

[0034] The control unit is further configured to adjust the control valve opening and the seawater pump speed in the critical combination parameters by a fuzzy control method, and to adjust the control parameters of the fuzzy control based on the target seawater flow, the real-time temperature difference, and the real-time rate of change.

[0035] In a third aspect, an embodiment of the present application further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method provided in the first aspect of the embodiment of the present application or any one of the implementations of the first aspect is implemented.

[0036] In a fourth aspect, the present application also provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, it implements the method provided by the first aspect of the embodiment of the present application or any one of the implementation methods of the first aspect.

[0037] The beneficial effects of the technical solutions provided by some embodiments of the present application include at least:

[0038] In the embodiment of the present application, when the operating conditions of the ship change, the heat load suddenly fluctuates significantly, or the seawater temperature suddenly fluctuates significantly, the real-time operating condition information of the ship is obtained, so that the seawater flow rate at the current moment is determined according to the combination parameters of the control valve opening and the seawater pump speed corresponding to the operating condition type; the influence of the combination parameters on the ship's seawater flow control system under the current operating conditions can be determined according to the temperature difference between the seawater temperature and the seawater temperature at the outlet under each combination parameter, as well as the speed information, draft, and output power change rate of the ship, and then the control valve opening and seawater pump speed in the combination parameters are adjusted more finely to ensure that the seawater pump flow rate reaches the seawater flow rate required at the current moment without affecting the current operating conditions, thereby realizing active regulation of the ship's seawater flow rate and improving the safety of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 This is a flow chart of a method for controlling seawater flow in a ship provided in an embodiment of the present application;

[0041] Figure 2 This is a structural diagram of a ship seawater flow control system provided by an embodiment of the present application;

[0042] Figure 3 It is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0044] The terms "including" and "having," and any variations thereof, in the specification and claims of this application and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or modules is not limited to the listed steps or modules, but may optionally include steps or modules not listed, or may optionally include other steps or modules inherent to the process, method, product, or apparatus.

[0045] It should be noted that the terms "first" and "second" used in this application are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It is understood that the terms "first" and "second" may interchangeably represent a specific order or precedence, where permitted. It should be understood that the objects distinguished by "first" and "second" may interchangeably represent a specific order or precedence, where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that described or illustrated herein.

[0046] The present application is described in detail below with reference to specific embodiments.

[0047] Next, combine Figure 1 , taking the terminal executing ship seawater flow control as an example, the ship seawater flow control method provided by the embodiment of the present application is introduced. Figure 1 , Figure 1 FIG. 1 shows a flow chart of a method for controlling seawater flow of a ship provided by an embodiment of the present application. Figure 1 As shown, the method includes the following steps:

[0048] S101, obtaining speed information, draft, and output power of a power unit of a ship, and determining real-time operating condition information of the ship based on the speed information, draft, and output power;

[0049] S102, determining an operating condition type based on the real-time operating condition information, and adjusting the control valve opening of the flow control valve and the speed of the seawater pump to different combination parameters of the control valve opening and the seawater pump speed under each operating condition type, and determining the seawater flow rate corresponding to each combination parameter;

[0050] S103, obtaining the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit under each combination of parameters, and obtaining the speed information, draft, and output power change rate of the ship under each combination of parameters;

[0051] S104 , adjusting the control valve opening and the seawater pump speed in the current combined parameters according to the ratio of the temperature difference to the preset temperature difference threshold and the ratio of the change rate to the change rate threshold.

[0052] In some embodiments, the ship seawater flow control method provided in the above embodiments further includes:

[0053] Acquire historical data of the ship in each operating condition, wherein the historical data includes historical speed information, historical draft, and historical output power under the corresponding operating condition;

[0054] and determining the control valve opening range of the flow control valve and the seawater pump speed range of the seawater pump under each of the operating conditions, obtaining the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship's cooling unit, and obtaining the speed information, draft, and rate of change of the output power of the ship under each of the combined parameters;

[0055] When the temperature difference is not greater than a preset temperature difference threshold and the rate of change is not greater than a preset rate of change threshold, determining an upper limit of the seawater flow rate under the corresponding operating condition type; when the temperature difference is greater than the preset temperature difference threshold and the rate of change is greater than the preset rate of change threshold, determining a lower limit of the seawater flow rate under the corresponding operating condition type;

[0056] After determining the operating condition type based on the real-time operating condition information, the method further includes:

[0057] The seawater flow rate corresponding to each of the combination parameters is between the seawater flow rate upper limit and the seawater flow rate lower limit.

[0058] In some embodiments, the ship seawater flow control method provided in the above embodiments further includes:

[0059] A plurality of combination parameters of control valve openings and seawater pump speeds are preset, and the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit under each of the combination parameters is obtained respectively, and the speed information, draft and rate of change of the output power of the ship under each of the combination parameters are obtained; with the range of seawater flow under each operating condition type determined in the historical data as a constraint condition, a critical combination parameter that satisfies the constraint condition is calculated through linear programming, and the ship seawater flow control system is adjusted based on the critical combination parameter.

[0060] In some embodiments, the ship seawater flow control method provided in the above embodiments further includes:

[0061] The control valve opening and the seawater pump speed in the critical combination parameters are adjusted by a fuzzy control method, and the control parameters of the fuzzy control are adjusted based on the target seawater flow, the real-time temperature difference and the real-time change rate.

[0062] In some embodiments, a mathematical model can also be constructed based on the temperature of various mechanical equipment of the seawater flow control system, the draft of the ship, the stability of the ship, etc.; the changes in the temperature, draft of the ship, and stability of the ship in the adjustable space of the combination parameters of the seawater flow control system of the control valve opening and the seawater pump speed under each operating condition type are obtained, and a function with the combinable parameters as independent variables and the temperature, draft of the ship, and stability of the ship as dependent variables is obtained. Furthermore, the current operating condition type can be changed to determine the optimal combination parameters corresponding to the optimal temperature, draft of the ship, and stability of the ship under different operating conditions, and the change law of the optimal combination parameters with various operating parameters under different operating conditions types is obtained, thereby guiding the calibration of the optimal temperature, draft of the ship, and stability of the ship under the new operating condition.

[0063] It can be understood that stability can be quantified by parameters such as the center of gravity offset and steering angle of the ship during navigation, and the embodiments of the present application are not limited to this.

[0064] The following are device embodiments of the present application, which can be used to implement the method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

[0065] See next Figure 2 , is a schematic diagram of the structure of a ship seawater flow control system provided by an exemplary embodiment of the present application. The device can be implemented as all or part of a terminal through software, hardware, or a combination of both, or can be integrated into a server as an independent module. The ship seawater flow control system in the embodiment of the present application can be applied to a terminal or the cloud. The system 20 includes a data acquisition unit 201, a flow calculation unit 202, and a control unit 203, wherein:

[0066] The data acquisition unit 201 is used to obtain the speed information, draft and output power of the power unit of the ship, and determine the real-time operating condition information of the ship according to the speed information, draft and output power;

[0067] The flow calculation unit 202 is configured to determine an operating condition type based on the real-time operating condition information, and under each operating condition type, adjust the control valve opening of the flow control valve and the speed of the seawater pump to different combination parameters of the control valve opening and the seawater pump speed, and determine the seawater flow rate corresponding to each combination parameter;

[0068] The control unit 203 is configured to obtain a temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit under each of the combined parameters, and obtain speed information, draft, and a rate of change of the output power of the ship under each of the combined parameters;

[0069] The control unit 203 is further configured to adjust the control valve opening and the seawater pump speed in the current combined parameters according to the ratio of the temperature difference to the preset temperature difference threshold and the ratio of the change rate to the change rate threshold.

[0070] It should be noted that the system 20 provided in the above embodiment, when executing the method for controlling seawater flow rate of a ship, is merely illustrated by the division of the aforementioned functional modules. In actual applications, the aforementioned functions can be assigned to different functional modules as needed, i.e., the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. Furthermore, the system provided in the above embodiment and the embodiment of the method for controlling seawater flow rate of a ship are based on the same concept. The implementation process is detailed in the method embodiment and will not be further described here.

[0071] An embodiment of the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of the method of any of the above embodiments are implemented.

[0072] See Figure 3 , is a structural block diagram of an electronic device provided in an embodiment of the present application.

[0073] like Figure 3 As shown, the electronic device 300 includes a processor 301 and a memory 302 .

[0074] In the embodiment of the present application, the processor 301 is the control center of the computer system and can be the processor of a physical machine or the processor of a virtual machine. The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 301 can be implemented in the form of at least one hardware of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), or PLA (Programmable Logic Array).

[0075] The processor 301 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also called a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state.

[0076] The memory 302 may include one or more computer-readable storage media, which may be non-transitory. The memory 302 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices and flash memory storage devices. In some embodiments of the present application, the non-transitory computer-readable storage medium in the memory 302 is used to store at least one instruction, which is used to be executed by the processor 301 to implement the method in the embodiment of the present application.

[0077] In some embodiments, the electronic device 300 further includes: a peripheral device interface 303 and at least one peripheral device 304. The processor 301, the memory 302, and the peripheral device interface 303 can be connected via a bus or signal lines. Each peripheral device 304 can be connected to the peripheral device interface 303 via a bus, signal lines, or a circuit board. Specifically, the peripheral devices 304 include: a display screen, a camera, and an audio circuit. The peripheral device interface 303 can be used to connect at least one I / O (Input / Output)-related peripheral device to the processor 301 and the memory 302.

[0078] In some embodiments of the present application, the processor 301, the memory 302, and the peripheral device interface 303 are integrated on the same chip or circuit board; in some other embodiments of the present application, any one or two of the processor 301, the memory 302, and the peripheral device interface 303 may be implemented on separate chips or circuit boards. This embodiment of the present application is not specifically limited to this.

[0079] The electronic device structure block diagram shown in the embodiment of the present application does not constitute a limitation on the electronic device 300. The electronic device 300 may include more or fewer components than shown in the figure, or combine certain components, or adopt a different component arrangement.

[0080] The present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method of any of the aforementioned embodiments. The computer-readable storage medium may include, but is not limited to, any type of disk, including a floppy disk, an optical disk, a DVD, a CD-ROM, a microdrive, a magneto-optical disk, a ROM, a RAM, an EPROM, an EEPROM, a DRAM, a VRAM, a flash memory device, a magnetic card or an optical card, a nanosystem (including a molecular memory IC), or any type of medium or device suitable for storing instructions and / or data.

[0081] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the above technical solution, in essence, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for controlling seawater flow of a ship, characterized in that: Applied to a ship seawater flow control system, the ship seawater flow control system includes a flow control valve and a seawater pump, and the method includes: Acquiring speed information, draft, and output power of a power unit of the ship, and determining real-time operating condition information of the ship based on the speed information, the draft, and the output power; determining an operating condition type based on the real-time operating condition information, and adjusting the control valve opening of the flow control valve and the speed of the seawater pump to different combination parameters of the control valve opening and the seawater pump speed under each operating condition type, and determining the seawater flow rate corresponding to each combination parameter; Obtaining the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit under each of the combination parameters, and obtaining the speed information, draft, and rate of change of the output power of the ship under each of the combination parameters; The control valve opening and the seawater pump speed in the current combined parameters are adjusted according to the ratio of the temperature difference to the preset temperature difference threshold and the ratio of the change rate to the change rate threshold.

2. A method for controlling seawater flow of a ship according to claim 1, characterized in that: The method further comprises: Acquire historical data of the ship in each operating condition, wherein the historical data includes historical speed information, historical draft, and historical output power under the corresponding operating condition; and determining the control valve opening range of the flow control valve and the seawater pump speed range of the seawater pump under each of the operating conditions, obtaining the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship's cooling unit, and obtaining the speed information, draft, and rate of change of the output power of the ship under each of the combined parameters; When the temperature difference is not greater than a preset temperature difference threshold and the rate of change is not greater than a preset rate of change threshold, determining an upper limit of the seawater flow rate under the corresponding operating condition type; when the temperature difference is greater than the preset temperature difference threshold and the rate of change is greater than the preset rate of change threshold, determining a lower limit of the seawater flow rate under the corresponding operating condition type; After determining the operating condition type based on the real-time operating condition information, the method further includes: The seawater flow rate corresponding to each of the combination parameters is between the seawater flow rate upper limit and the seawater flow rate lower limit.

3. A method for controlling seawater flow of a ship according to claim 2, characterized in that: The method further comprises: A plurality of combination parameters of control valve openings and seawater pump speeds are preset, and the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit under each of the combination parameters is obtained respectively, and the speed information, draft and rate of change of the output power of the ship under each of the combination parameters are obtained; with the range of seawater flow under each operating condition type determined in the historical data as a constraint condition, a critical combination parameter that satisfies the constraint condition is calculated through linear programming, and the ship seawater flow control system is adjusted based on the critical combination parameter.

4. A method for controlling seawater flow of a ship according to claim 3, characterized in that: The method further comprises: The control valve opening and the seawater pump speed in the critical combination parameters are adjusted by a fuzzy control method, and the control parameters of the fuzzy control are adjusted based on the target seawater flow, the real-time temperature difference and the real-time change rate.

5. A ship seawater flow control system, characterized in that: The ship seawater flow control system includes a flow control valve and a seawater pump, and the system also includes: a data acquisition unit, configured to acquire speed information, draft, and output power of a power unit of the ship, and determine real-time operating condition information of the ship based on the speed information, draft, and output power; a flow calculation unit, configured to determine an operating condition type based on the real-time operating condition information, and, under each operating condition type, adjust the control valve opening of the flow control valve and the speed of the seawater pump to different combination parameters of the control valve opening and the seawater pump speed, and determine the seawater flow rate corresponding to each combination parameter; a control unit, configured to obtain a temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit under each of the combined parameters, and obtain speed information, draft, and a rate of change of the output power of the ship under each of the combined parameters; The control unit is further configured to adjust the control valve opening and the seawater pump speed in the current combined parameters according to the ratio of the temperature difference to the preset temperature difference threshold and the ratio of the change rate to the change rate threshold.

6. A ship seawater flow control system according to claim 5, characterized in that: The flow calculation unit is further used to obtain historical data of the ship in each operating condition type, wherein the historical data includes historical speed information, historical draft and historical output power under the corresponding operating condition type; The flow calculation unit is further used to determine the control valve opening range of the flow control valve and the seawater pump speed range of the seawater pump under each of the operating conditions, and obtain the temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit, and obtain the speed information, draft and output power change rate of the ship under each of the combined parameters; The flow calculation unit is further configured to determine an upper limit of seawater flow under a corresponding operating condition when the temperature difference is not greater than a preset temperature difference threshold and the change rate is not greater than a preset change rate threshold; When the temperature difference is greater than a preset temperature difference threshold and the change rate is greater than a preset change rate threshold, determining a lower limit of seawater flow under a corresponding operating condition type; After determining the operating condition type based on the real-time operating condition information, the flow calculation unit determines that the seawater flow corresponding to each of the combined parameters is between the seawater flow upper limit and the seawater flow lower limit.

7. A ship seawater flow control system according to claim 6, characterized in that: The control unit is further configured to preset a plurality of combination parameters of control valve openings and seawater pump speeds, respectively obtain a temperature difference between the seawater temperature at the water inlet and the seawater temperature at the water outlet of the ship cooling unit under each of the combination parameters, and obtain speed information, draft, and a rate of change of the output power of the ship under each of the combination parameters; The range of seawater flow under each operating condition determined in the historical data is used as a constraint condition, critical combination parameters that meet the constraint condition are calculated through linear programming, and the ship seawater flow control system is adjusted based on the critical combination parameters.

8. A ship seawater flow control system according to claim 7, characterized in that: The control unit is further configured to adjust the control valve opening and the seawater pump speed in the critical combination parameters by a fuzzy control method, and to adjust the control parameters of the fuzzy control based on the target seawater flow, the real-time temperature difference, and the real-time rate of change.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the method according to any one of claims 1 to 4 are implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

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