Ship power supply control method, system, equipment and medium

Abstract

The invention relates to the technical field of electric ship power supply, in particular to a ship power supply control method, system and device and a medium. Acquiring total current information of connected alternating current equipment on the ship; under the condition that the alternating current charging state information is accessed, a PWM duty ratio signal is obtained, power supply current is matched according to the PWM duty ratio signal, and maximum power supply information is obtained; and charging quantity analysis is performed according to the total current information and the maximum power supply information to obtain charging threshold instruction information for limiting the charging power of the shipborne charger, so that the conversion cost from direct current to alternating current is reduced while the electric ship operates efficiently.

Description

Technical Field

[0001] The present application relates to the technical field of electric ship power supply, and in particular to a ship power supply control method, system, equipment and medium. Background Art

[0002] The shipbuilding industry has experienced hundreds of years of development, from the earliest wooden sailing ships to modern steel warships. Technological advances have led to continuous improvements in the design and construction of ships. Over time, the power system of ships has gradually transitioned from sails to steam, diesel and electric drives, forming a variety of power source options. In recent years, electric ships have become a new trend of environmental protection and energy saving, and have gradually attracted attention.

[0003] Electrical equipment on electric ships are usually divided into two types: AC and DC. DC is mainly used for storage and power supply of power batteries, while AC is mostly used for high-power equipment such as air conditioners, electric propulsion systems, electric water heaters, etc. With the improvement of electric ship technology, more and more electrical equipment requires high-power AC. Since the AC appliances on ships require high power, directly adding DC-AC marine inverters to convert AC to DC will significantly increase the cost of the entire ship, and it is necessary to add a set of output lines to the high-voltage battery. The output lines are connected between the high-voltage battery and the inverter. This type of high-voltage cable is expensive and difficult to assemble. The above problems need to be solved. Summary of the invention

[0004] In order to reduce the conversion cost of direct current to alternating current while ensuring efficient operation of electric ships, the present application provides a ship power supply control method, system, device and medium, which adopt the following technical solutions:

[0005] In a first aspect, the present application provides a ship power supply control method, comprising:

[0006] Get AC charging status information;

[0007] Obtain the total current information of the AC equipment connected on the ship;

[0008] When the AC charging state information is connected, a PWM duty cycle signal is obtained, and the power supply current is matched according to the PWM duty cycle signal to obtain maximum power supply information;

[0009] The charging capacity is analyzed according to the total current information and the maximum power supply information to obtain the charging threshold instruction information for limiting the charging power of the shipboard charger.

[0010] Preferably, it also includes:

[0011] When the AC charging state information indicates that the AC charging state is not connected, a discharge capacity analysis is performed based on the total current information to obtain discharge output instruction information for adjusting the shipboard charger to the discharge mode.

[0012] Preferably, the specific steps of acquiring the PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are:

[0013] A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 8% to 10%, the matched AC current is 6A.

[0014] Preferably, the specific steps of acquiring the PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are:

[0015] Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 10% to 85%, the matching AC current is:

[0016] I max =(D×100)×0.6

[0017] Among them, I max To match the obtained AC current, D is the PWM duty cycle.

[0018] Preferably, the specific steps of acquiring the PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are:

[0019] Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 85% to 90%, the matching AC current is:

[0020] I max =(D×100-64)×2.5

[0021] Among them, I max To match the obtained AC current, D is the PWM duty cycle.

[0022] Preferably, the specific steps of acquiring the PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are:

[0023] A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 90% to 97%, the matched AC current is 63A.

[0024] Preferably, the specific steps of acquiring the PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are:

[0025] The PWM duty cycle signal is obtained. When the PWM duty cycle signal is less than 8% or greater than 97%, the matching output is 0.

[0026] In a second aspect, the present application provides a ship power supply control system, comprising:

[0027] A charging status acquisition module, used to obtain AC charging status information;

[0028] The total power acquisition module is used to obtain the total current information of the AC equipment connected on the ship;

[0029] A power supply current matching module is used to obtain a PWM duty cycle signal when the AC charging state information is connected, match the power supply current according to the PWM duty cycle signal, and obtain maximum power supply information;

[0030] The charging instruction output module is used to analyze the charging amount according to the total current information and the maximum power supply information, and obtain the charging threshold instruction information for limiting the charging power of the shipboard charger.

[0031] Preferably, it also includes:

[0032] The discharge command output module is used to analyze the discharge amount according to the total current information when the AC charging state information is not connected, and obtain the discharge output command information for adjusting the shipboard charger to the discharge mode.

[0033] Preferably, the power supply current matching module is used to obtain a PWM duty cycle signal, and the specific steps of matching the power supply current according to the PWM duty cycle signal to obtain the maximum power supply information are:

[0034] A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 8% to 10%, the matched AC current is 6A.

[0035] Preferably, the power supply current matching module is used to obtain a PWM duty cycle signal, and the specific steps of matching the power supply current according to the PWM duty cycle signal to obtain the maximum power supply information are:

[0036] Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 10% to 85%, the matching AC current is:

[0037] I max =(D×100)×0.6

[0038] Among them, I max To match the obtained AC current, D is the PWM duty cycle.

[0039] Preferably, the power supply current matching module is used to obtain a PWM duty cycle signal, and the specific steps of matching the power supply current according to the PWM duty cycle signal to obtain the maximum power supply information are:

[0040] Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 85% to 90%, the matching AC current is:

[0041] I max =(D×100-64)×2.5

[0042] Among them, I max To match the obtained AC current, D is the PWM duty cycle.

[0043] Preferably, the power supply current matching module is used to obtain a PWM duty cycle signal, and the specific steps of matching the power supply current according to the PWM duty cycle signal to obtain the maximum power supply information are:

[0044] A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 90% to 97%, the matched AC current is 63A.

[0045] Preferably, the power supply current matching module is used to obtain a PWM duty cycle signal, and the specific steps of matching the power supply current according to the PWM duty cycle signal to obtain the maximum power supply information are:

[0046] The PWM duty cycle signal is obtained. When the PWM duty cycle signal is less than 8% or greater than 97%, the matching output is 0.

[0047] In a third aspect, the present application provides a ship power supply control device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the ship power supply control method as described above.

[0048] In a fourth aspect, the present application provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the ship power supply control method as described above when running.

[0049] In summary, compared with the prior art, the technical solution provided by this application has at least the following beneficial effects:

[0050] The present application determines whether the ship is connected to the AC mains by acquiring the AC charging status information. When the AC charging status information determines that the ship is connected, the PWM duty cycle signal of the power supply equipment is acquired, and the current power supply current is matched according to the current PWM duty cycle signal, so as to obtain the maximum power supply information of the current power supply equipment. Then, the charging amount is analyzed by the total current information and the maximum power supply information of the current AC power-consuming equipment of the ship, and the charging threshold command information for limiting the shipboard charger is obtained. The charging threshold command information is sent to the charger, so as to adjust the charger power to an appropriate range, so as to achieve the effect of reducing the conversion cost of DC to AC while achieving efficient operation of the electric ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a flow chart of a ship power supply control method described in an embodiment of the present application.

[0052] Figure 2 It is a circuit module schematic diagram of the ship power supply control system described in the embodiment of the present application.

[0053] Figure 3 It is a module schematic diagram of a ship power supply control system described in an embodiment of the present application.

[0054] Description of reference numerals:

[0055] 1. Charging status acquisition module; 2. Total power consumption acquisition module; 3. Power supply current matching module; 4. Charging instruction output module. DETAILED DESCRIPTION

[0056] The following combination Figure 1-Figure 3 The present application is described in further detail. The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to be limiting.

[0057] Reference Figure 1 and Figure 2 The present application relates to a ship power supply control method, which specifically includes:

[0058] Get AC charging status information;

[0059] Obtain the total current information of the AC equipment connected on the ship;

[0060] When the AC charging state information is connected, a PWM duty cycle signal is obtained, and the power supply current is matched according to the PWM duty cycle signal to obtain maximum power supply information;

[0061] The charging capacity is analyzed according to the total current information and the maximum power supply information to obtain the charging threshold instruction information for limiting the charging power of the shipboard charger.

[0062] Specifically, the present application determines whether the ship is connected to the AC mains by acquiring the AC charging status information. The AC charging status information is obtained by a current transformer connected between the power supply equipment and the AC power equipment on board, and can timely detect whether the ship is connected to the shore power supply equipment. In the case where the signal acquired by the current transformer changes, the AC charging status information is judged to be connected. At this time, the PWM duty cycle signal of the power supply equipment is acquired, and the current power supply current is matched according to the current PWM duty cycle signal, so as to obtain the maximum power supply information of the current power supply equipment. Then, the charging amount is analyzed by the total current information and maximum power supply information of the current AC power equipment of the ship, and the charging threshold instruction information for limiting the shipboard charger is obtained. By sending the charging threshold instruction information to the charger, the charger power is adjusted to an appropriate range, so as to achieve the effect of reducing the conversion cost of DC to AC while the electric ship is operating efficiently.

[0063] Among them, AC equipment on ships usually include refrigerators, microwave ovens, electric ovens, electric water heaters, televisions, sockets, electric lights, ice makers, ventilation systems, audio, etc., and DC equipment on ships usually include wipers, electric pumps, monitoring systems, navigation systems, etc. The total current information of the AC equipment connected on the ship is specifically the total power consumption value of the AC equipment on the ship. The power supply equipment is the shore AC charging pile.

[0064] As one implementation mode, it also includes:

[0065] When the AC charging state information indicates that the AC charging state is not connected, a discharge capacity analysis is performed based on the total current information to obtain discharge output instruction information for adjusting the shipboard charger to the discharge mode.

[0066] Specifically, in the embodiment of the present application, when the AC charging status information is not connected, the discharge amount is judged according to the total current information of the AC equipment connected on the ship, so as to control the shipboard charger to enter the discharge mode. At this time, the shipboard charger obtains power from the high-voltage battery in the ship to power the AC power-consuming equipment on the ship, realizing the bidirectional OBC, that is, the discharge function of the bidirectional shipboard charger. For example, when the user is charging, the VCU detects that there is AC power input, and the VCU sets the OBC to the charging state through communication. The OBC inputs AC power and outputs a DC voltage to charge the high-voltage battery. The AC power on the ship is directly powered by AC mains.

[0067] The implementation method of this application is to control the working mode of the onboard charger OBC through software. When the main control unit VCU detects that there is no AC mains input, it communicates with the OBC to set the OBC to discharge mode, and the high-voltage battery provides AC voltage to the AC equipment on board through the OBC. The VCU outputs the OBC_EN signal to the OBC to wake up the OBC, and then outputs a command to the OBC through CAN communication to set the OBC to the discharge mode, so that the OBC enters the discharge mode.

[0068] As one implementation method, the specific steps of obtaining a PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are as follows:

[0069] A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 8% to 10%, the matched AC current is 6A.

[0070] Specifically, the PWM duty cycle signal of the embodiment of the present application is greater than or equal to 8% and less than 10%. When the AC power supply capacity of the power supply device is limited, the VCU identifies the size of the duty cycle of the PWM signal of the power supply device, thereby identifying the maximum current that the power supply device can provide. That is, the VCU detects the duty cycle of the detection point, which is set after the diode in the line used by the electric ship to connect the output end of the power supply device, so as to know the maximum power supply current I of the power supply device. max .

[0071] In the duty cycle range of the embodiment of the present application, the charging current is limited to 6A, and the power is 1320W when the corresponding AC voltage is 220V. At this time, the current is low but the power level is safe, which is sufficient for charging without overloading the power equipment. The charging power is within a safe range to avoid overload, and at the same time, a lower charging power can be provided for the electric vehicle, so that the system can operate stably.

[0072] As one implementation method, the specific steps of obtaining a PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are as follows:

[0073] Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 10% to 85%, the matching AC current is:

[0074] I max =(D×100)×0.6

[0075] Among them, I max To match the obtained AC current, D is the PWM duty cycle.

[0076] Specifically, the PWM duty cycle signal of the embodiment of the present application is greater than or equal to 10% and less than or equal to 85%. When the duty cycle is 10% to 85%, the system allows a higher charging current. As the duty cycle increases, the charging current increases linearly to (D×100)×0.6. This embodiment can adjust the charging current according to demand, so that the system can dynamically adjust the power output according to the charging state of the battery. At the same time, the maximum power limit is 7920W to prevent overload.

[0077] The configuration of this embodiment allows the system to adjust the charging power within a larger range, so as to provide sufficient current for efficient charging within a safe range while avoiding excessive load.

[0078] As one implementation method, the specific steps of obtaining a PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are as follows:

[0079] Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 85% to 90%, the matching AC current is:

[0080] I max =(D×100-64)×2.5

[0081] Among them, I max To match the obtained AC current, D is the PWM duty cycle.

[0082] Specifically, the PWM duty cycle signal of the embodiment of the present application is greater than 85% and less than or equal to 90%. When the duty cycle reaches 85% to 90%, the charging current will significantly increase to (D×100-64)×2.5, which means that at a higher duty cycle, the current demand increases sharply, but the current is limited to within 63A, so that the system will not be overloaded due to excessive current.

[0083] This embodiment is configured to provide a higher charging current under high load conditions, but by limiting the maximum current to 63A, current overload of the charging system is prevented, thereby avoiding damage to the power equipment and the charging system.

[0084] As one implementation method, the specific steps of obtaining a PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are as follows:

[0085] A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 90% to 97%, the matched AC current is 63A.

[0086] Specifically, the PWM duty cycle signal of the embodiment of the present application is greater than 90% and less than or equal to 97%. When the duty cycle is between 90% and 97%, the current demand is high, and the system limits the maximum charging current to 63A to avoid exceeding the safe carrying capacity of the power equipment. By limiting the current, the system will not fail or be damaged due to overload.

[0087] Under high duty cycle conditions, the maximum current is limited to 63A, allowing the charging system to operate within a safe range and avoiding overload of electrical equipment.

[0088] As one implementation method, the specific steps of obtaining a PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are as follows:

[0089] The PWM duty cycle signal is obtained. When the PWM duty cycle signal is less than 8% or greater than 97%, the matching output is 0.

[0090] Specifically, the duty cycle of the embodiment of the present application is less than 3%, which means that the output of the power supply device is very low or unstable. The low power or unstable power output is not enough to start charging. Starting charging will cause the charging device to be unstable or even damage the device, so charging is not started. When the duty cycle is 3% to 7%, specifically greater than or equal to 3% and less than or equal to 7%, although the power output is still low and cannot support charging, communication can be carried out to allow the charging device to exchange information with the charging station or control system. In the current case, the current and power requirements are still too low and charging is not started. In the case of 3% to 7%, even if the power is insufficient for charging, the device can still monitor the status and communicate to ensure that the system can diagnose, debug or wait for more suitable conditions. The duty cycle in the range of 7% to 8% still indicates that the output power is low. 7% to 8% is specifically greater than 7% and less than 8%. The charging current still cannot meet the minimum requirements for charging. Although the duty cycle is slightly increased, it is still not suitable for starting charging. By setting it to not start charging, it is prevented from forcibly starting charging when the power output is insufficient, improving the safety of the charging process, and preventing the device from malfunctioning due to low power input.

[0091] In this embodiment, when the duty cycle is greater than 97%, it means that the power supply is very unstable or the load is close to the maximum value. Further increase in load may cause system overload or damage. At this time, not starting charging is to protect the safety of power equipment and charging system, prevent starting charging when the power supply is extremely tight or the equipment is close to the maximum load, and improve the safety and stability of the system.

[0092] The embodiments of the present application protect the charging equipment and the power system so that the equipment will not be damaged or the system will not be unstable due to excessive load during the charging process. By adjusting the charging current and power according to the duty cycle, the system can flexibly respond to different power supply conditions while maintaining charging efficiency and safety. Within different duty cycle ranges, charging can be started or current can be limited at the right time to ensure that the charging process is carried out under safe and efficient conditions.

[0093] Reference Figure 3 , an embodiment of the present application provides a ship power supply control system, including:

[0094] A charging status acquisition module, used to obtain AC charging status information;

[0095] The total power acquisition module is used to obtain the total current information of the AC equipment connected on the ship;

[0096] A power supply current matching module is used to obtain a PWM duty cycle signal when the AC charging state information is connected, match the power supply current according to the PWM duty cycle signal, and obtain maximum power supply information;

[0097] The charging instruction output module is used to analyze the charging amount according to the total current information and the maximum power supply information, and obtain the charging threshold instruction information for limiting the charging power of the shipboard charger.

[0098] As one implementation mode, it also includes:

[0099] The discharge command output module is used to analyze the discharge amount according to the total current information when the AC charging state information is not connected, and obtain the discharge output command information for adjusting the shipboard charger to the discharge mode.

[0100] As one implementation mode, the power supply current matching module is used to obtain a PWM duty cycle signal, and the specific steps of matching the power supply current according to the PWM duty cycle signal to obtain the maximum power supply information are as follows:

[0101] A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 8% to 10%, the matched AC current is 6A.

[0102] As one implementation method, the power supply current matching module is used to obtain a PWM duty cycle signal, and the specific steps of matching the power supply current according to the PWM duty cycle signal to obtain the maximum power supply information are:

[0103] Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 10% to 85%, the matching AC current is:

[0104] I max =(D×100)×0.6

[0105] Among them, I max To match the obtained AC current, D is the PWM duty cycle.

[0106] As one implementation mode, the power supply current matching module is used to obtain a PWM duty cycle signal, and the specific steps of matching the power supply current according to the PWM duty cycle signal to obtain the maximum power supply information are as follows:

[0107] Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 85% to 90%, the matching AC current is:

[0108] I max =(D×100-64)×2.5

[0109] Among them, I max To match the obtained AC current, D is the PWM duty cycle.

[0110] As one implementation mode, the power supply current matching module is used to obtain a PWM duty cycle signal, and the specific steps of matching the power supply current according to the PWM duty cycle signal to obtain the maximum power supply information are as follows:

[0111] A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 90% to 97%, the matched AC current is 63A.

[0112] As one implementation mode, the power supply current matching module is used to obtain a PWM duty cycle signal, and the specific steps of matching the power supply current according to the PWM duty cycle signal to obtain the maximum power supply information are as follows:

[0113] The PWM duty cycle signal is obtained. When the PWM duty cycle signal is less than 8% or greater than 97%, the matching output is 0.

[0114] An embodiment of the present application provides a ship power supply control device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the ship power supply control method as described above.

[0115] An embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the ship power supply control method as described above when running.

[0116] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described device and product can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0117] In several embodiments provided in this application, it should be understood that the disclosed methods, systems, devices and program products may be implemented in other ways.

[0118] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0119] As described above, 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 ship power supply control method, characterized in that: include: Get AC charging status information; Obtain the total current information of the AC equipment connected on the ship; When the AC charging state information is connected, a PWM duty cycle signal is obtained, and the power supply current is matched according to the PWM duty cycle signal to obtain maximum power supply information; The charging capacity is analyzed according to the total current information and the maximum power supply information to obtain the charging threshold instruction information for limiting the charging power of the shipboard charger.

2. The ship power supply control method according to claim 1, characterized in that: Also includes: When the AC charging state information indicates that the AC charging state is not connected, a discharge capacity analysis is performed based on the total current information to obtain discharge output instruction information for adjusting the shipboard charger to the discharge mode.

3. The ship power supply control method according to claim 1, characterized in that: The specific steps of obtaining the PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are: A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 8% to 10%, the matched AC current is 6A.

4. The ship power supply control method according to claim 1, characterized in that: The specific steps of obtaining the PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are: Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 10% to 85%, the matching AC current is: I max =(D×100)×0.6 Among them, I max To match the obtained AC current, D is the PWM duty cycle.

5. The ship power supply control method according to claim 1, characterized in that: The specific steps of obtaining the PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are: Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 85% to 90%, the matching AC current is: I max =(D×100-64)×2.5 Among them, I max To match the obtained AC current, D is the PWM duty cycle.

6. The ship power supply control method according to claim 1, characterized in that: The specific steps of obtaining the PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are: A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 90% to 97%, the matched AC current is 63A.

7. The ship power supply control method according to claim 1, characterized in that: The specific steps of obtaining the PWM duty cycle signal, matching the power supply current according to the PWM duty cycle signal, and obtaining the maximum power supply information are: The PWM duty cycle signal is obtained. When the PWM duty cycle signal is less than 8% or greater than 97%, the matching output is 0.

8. A ship power supply control system, characterized in that: include: A charging status acquisition module, used to obtain AC charging status information; The total power acquisition module is used to obtain the total current information of the AC equipment connected on the ship; A power supply current matching module is used to obtain a PWM duty cycle signal when the AC charging state information is connected, match the power supply current according to the PWM duty cycle signal, and obtain maximum power supply information; The charging instruction output module is used to analyze the charging amount according to the total current information and the maximum power supply information, and obtain the charging threshold instruction information for limiting the charging power of the shipboard charger.

9. The ship power supply control system according to claim 8, characterized in that: Also includes: The discharge command output module is used to analyze the discharge amount according to the total current information when the AC charging state information is not connected, and obtain the discharge output command information for adjusting the shipboard charger to the discharge mode.

10. The ship power supply control system according to claim 8, characterized in that: The power supply current matching module is used to obtain the PWM duty cycle signal, match the power supply current according to the PWM duty cycle signal, and obtain the maximum power supply information in the following specific steps: A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 8% to 10%, the matched AC current is 6A.

11. The ship power supply control system according to claim 8, characterized in that: The power supply current matching module is used to obtain the PWM duty cycle signal, match the power supply current according to the PWM duty cycle signal, and obtain the maximum power supply information in the following specific steps: Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 10% to 85%, the matching AC current is: I max =(D×100)×0.6 Among them, I max To match the obtained AC current, D is the PWM duty cycle.

12. The ship power supply control system according to claim 8, characterized in that: The power supply current matching module is used to obtain the PWM duty cycle signal, match the power supply current according to the PWM duty cycle signal, and obtain the maximum power supply information in the following specific steps: Get the PWM duty cycle signal. When the PWM duty cycle signal is equal to 85% to 90%, the matching AC current is: I max =(D×100-64)×2.5 Among them, I max To match the obtained AC current, D is the PWM duty cycle.

13. The ship power supply control system according to claim 8, characterized in that: The power supply current matching module is used to obtain the PWM duty cycle signal, match the power supply current according to the PWM duty cycle signal, and obtain the maximum power supply information in the following specific steps: A PWM duty cycle signal is obtained. When the PWM duty cycle signal is equal to 90% to 97%, the matched AC current is 63A.

14. The ship power supply control system according to claim 8, characterized in that: The power supply current matching module is used to obtain the PWM duty cycle signal, match the power supply current according to the PWM duty cycle signal, and obtain the maximum power supply information in the following specific steps: The PWM duty cycle signal is obtained. When the PWM duty cycle signal is less than 8% or greater than 97%, the matching output is 0.

15. A ship power supply control device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the ship power supply control method according to any one of claims 1 to 8.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program is configured to execute the ship power supply control method according to any one of claims 1 to 8 when running.

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