Power control system of electric ship

Abstract

The invention discloses a power control system of an electric ship. A data acquisition module is used for acquiring the current relative flow velocity of water flow, the current actual ship speed and the current still water ship speed; the speed comparison module is used for comparing the current actual ship speed with a preset ship speed to obtain a comparison result, and determining a target still water ship speed based on the comparison result; the power supply adjustment module is used for determining a target power parameter and a target power supply parameter of a ship motor according to the target still water ship speed, and generating a power supply adjustment instruction to adjust the power supply parameter; the auxiliary adjusting module is used for collecting electric energy generated by the ship motor or conducting power supply compensation on the ship motor according to the power supply adjusting instruction. The operation condition of the ship is collected and compared with the preset ship speed, so that the parameters of the ship motor and the power supply parameters for supplying power to the ship motor are determined, adjustment is carried out according to the parameters, meanwhile, electric energy collection or power supply compensation is carried out based on the adjustment mode, energy waste is reduced, and the output efficiency is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of equipment data processing, and in particular to a power control system, method, computing device and storage medium for an electric ship. Background Art

[0002] With the continuous consumption of fossil fuels and the increasing popularity of new energy technologies, the application of related new energy technologies in the shipping field has received more and more attention. Compared with long-distance or ultra-long-distance ocean shipping, current new energy technologies can be more quickly integrated into the inland shipping field, upgrade the power system of inland shipping vessels, and reduce the use of fossil fuels, pollutant emissions and carbon emissions through electric-driven inland shipping vessels.

[0003] At present, the power control for electric ships is still relatively simple, which is achieved by manually controlling the speed of the ship or setting a fixed output power and automatically maintaining it. However, during the ship's travel, based on the changes in water flow, whether it is the manually controlled ship speed or the ship speed corresponding to the fixed power setting, it is usually not the actual ship speed. This will cause the ship's travel time to deviate from the scheduled time. At the same time, neither manual control nor fixed speed can take into account the efficiency of the power supply system. In water flows with changing flow rates, in order to maintain the corresponding ship speed, the overall efficiency is low, resulting in a large waste of electricity. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a power control system for an electric ship and a corresponding power control method, computing device and computer storage medium for an electric ship.

[0005] According to one aspect of the present invention, a power control system for an electric ship is provided, comprising: a data acquisition module, a speed comparison module, a power supply adjustment module and an auxiliary adjustment module; wherein:

[0006] The data acquisition module is used to collect the current relative flow velocity of the water flow, the current actual ship speed and the current still water ship speed;

[0007] The speed comparison module is used to compare the current actual ship speed with the preset ship speed to obtain a comparison result, and determine the target still water ship speed based on the comparison result;

[0008] The power supply adjustment module is used to determine the target power parameters and target power supply parameters of the ship motor according to the target still water ship speed, and generate a power supply adjustment instruction to adjust the power supply parameters;

[0009] The auxiliary regulation module is used to collect the electric energy generated by the ship motor or to perform power supply compensation for the ship motor according to the power supply adjustment instruction.

[0010] In the above solution, the data acquisition module is further used for:

[0011] Determine the current actual ship speed based on the satellite positioning system;

[0012] The water flow sensor is used to monitor the relative flow velocity between the current water flow and the ship in real time, and the actual water flow velocity is calculated based on the current actual ship speed;

[0013] By obtaining the current power parameters of the ship's motor, the current still water ship speed is calculated.

[0014] In the above solution, the speed comparison module is further used for:

[0015] By comparing the current actual ship speed with the preset ship speed, judging whether the actual ship speed is greater than the preset ship speed based on the size of the two, a comparison result is obtained;

[0016] The target still water ship speed is calculated based on the preset ship speed and the actual water flow velocity;

[0017] Generate a ship speed adjustment instruction based on the target still water ship speed; where:

[0018] If the actual ship speed is greater than the preset ship speed, a ship speed reduction instruction is generated and issued; if the actual ship speed is less than the preset ship speed, a ship speed increase instruction is generated and issued.

[0019] In the above solution, the power supply adjustment module is further used to:

[0020] Calculate the target power parameters of the ship's motor based on the target still water ship speed;

[0021] Determining a target power supply parameter based on the target power parameter, and generating a power supply adjustment instruction based on the target power supply parameter;

[0022] Send the power supply adjustment command to the first power supply system of the ship to adjust the power supply parameters;

[0023] When the ship speed needs to be reduced, the power supply parameter of the first power supply system is reduced to the target power supply parameter;

[0024] When the ship speed needs to be increased, the power output power that needs to be increased is determined according to the target power supply parameters, and the increased power output power is divided into a first increased power and a second increased power according to the power division ratio; the first power supply increase parameter is determined according to the first increased power, and the first power supply system is adjusted; a compensation increase instruction is generated according to the second increased power, and sent to the auxiliary adjustment module.

[0025] In the above solution, the auxiliary adjustment module is further used to:

[0026] When the ship speed needs to be reduced, the electric energy generated by the ship's electric motor is collected and stored in the second power supply system;

[0027] When the ship speed needs to be increased, a compensation increase instruction is obtained, a compensation power supply parameter is determined according to the second increased power, and the second power supply system is controlled to perform compensation power supply.

[0028] In the above solution, the auxiliary adjustment module is further used to:

[0029] Based on the prediction of the SOC value of the first power supply system, constructing an efficiency model of the first power supply system;

[0030] Collecting historical power supply parameters of the first power supply system, and training the first power supply system efficiency model based on the historical power supply parameters to obtain a trained first power supply system efficiency model;

[0031] According to the first power supply system efficiency model, based on the SOC prediction value of the first power supply system, determine the optimal efficiency value of the first power supply system under the SOC prediction value, and further calculate the optimal power supply parameters corresponding to the optimal efficiency value;

[0032] A power division ratio is determined based on the optimal power supply parameters, and the first power supply system and the second power supply system are adjusted.

[0033] In the above solution, the auxiliary adjustment module is further used to:

[0034] The first power supply system efficiency model uses the extended Kalman filter to predict the SOC value of the first power supply system. Based on the recursive formula of the discretized terminal voltage, the SOC value is predicted through iterative estimation; wherein the recursive formula of the discretized terminal voltage is:

[0035]

[0036] Among them, V k is the terminal voltage; z [k] is the SOC value of the kth sampling point; OCV is the open circuit voltage; R1 is the polarization resistance value in the equivalent circuit of the second power supply system; is the current value flowing through the polarization resistor at the kth sampling point; R0 is the internal resistance in the equivalent circuit of the second power supply system; i [k] is the current value flowing through the internal resistance at the kth sampling point; [k+1] is the SOC value of the k+1th sampling point; Δt is the discretization step size; Q is the capacity of the second power supply system; wherein, when i>0, it indicates discharge.

[0037] According to another aspect of the present invention, there is provided a power control method for an electric ship, comprising:

[0038] Collect the current relative flow velocity, current actual ship speed and current still water ship speed;

[0039] Compare the current actual ship speed with the preset ship speed to obtain a comparison result, and determine the target still water ship speed based on the comparison result;

[0040] According to the target still water ship speed, the target power parameters and target power supply parameters of the ship motor are determined, and a power supply adjustment instruction is generated to adjust the power supply parameters;

[0041] According to the power supply adjustment instruction, the electric energy generated by the ship's electric motor is collected or the power supply of the ship's electric motor is compensated.

[0042] According to another aspect of the present invention, there is provided a computing device, comprising: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus;

[0043] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the operations implemented by the power control system of the electric ship as described above.

[0044] According to another aspect of the present invention, a computer storage medium is provided, wherein the storage medium stores at least one executable instruction, wherein the executable instruction enables a processor to execute the operations implemented by the power control system of an electric ship as described above.

[0045] According to the technical solution provided by the present invention, a power control system of an electric ship includes: a data acquisition module, a speed comparison module, a power supply adjustment module and an auxiliary adjustment module; wherein the data acquisition module is used to collect the current relative flow velocity of the water flow, the current actual ship speed and the current still water ship speed; the speed comparison module is used to compare the current actual ship speed with the preset ship speed to obtain a comparison result, and determine the target still water ship speed based on the comparison result; the power supply adjustment module is used to determine the target power parameters and target power supply parameters of the ship's motor according to the target still water ship speed, and generate a power supply adjustment instruction to adjust the power supply parameters; the auxiliary adjustment module is used to collect the electric energy generated by the ship's motor or perform power supply compensation on the ship's motor according to the power supply adjustment instruction. By obtaining the current actual ship speed from the satellite positioning system, obtaining the current relative water flow velocity through the sensor, and determining the current still water ship speed based on the power parameters of the current motor, the actual water flow velocity is accurately calculated, and the target still water ship speed is accurately calculated in combination with the preset ship speed. At the same time, through the comparison result of the current actual ship speed and the preset ship speed, the ship speed increase or speed reduction instruction is determined and generated, thereby scientifically determining the target still water ship speed corresponding to the preset ship speed, and accurately controlling the ship's running speed to make it meet the preset speed, reducing the error of the running time, and thus effectively improving the accuracy of the prediction of the departure and arrival time corresponding to the entire shipping process, which is also conducive to more accurate and reasonable scheduling of the port; based on the target net water ship speed, the corresponding motor power parameters are reversely calculated, and the target power supply is further determined. Parameters are calculated and adjustment instructions are generated so that the output provided by the power supply system just meets the target still water ship speed. At the same time, during the power supply parameter adjustment process, when the ship slows down, the electric energy generated by the motor at this time is recovered, which effectively reduces the waste of electric energy and improves the use efficiency; when the ship speeds up, the power output is allocated to the first power supply system and the second power supply system based on the power division ratio, and the output is compensated by the electric energy stored in the second power supply system. In the absence of additional electric energy, the efficiency reduction caused by the excessive output of the first power supply system is avoided, so that it is always kept in the best efficiency operating range, further improving the overall electric energy utilization efficiency, while reducing environmental pollution, improving the overall cruising range of the entire ship, and making the power supply system more reasonably used, ensuring the health of the power supply system and extending its service life. In addition, by constructing the efficiency model of the first power supply system, using historical power supply parameters for training, determining the SOC prediction value based on current data, and further obtaining the optimal efficiency value of the first power supply system and its corresponding power supply parameters, the power division ratio is determined, which further improves the intelligence of the system, enables more accurate power division, and enables the power supply system to be at optimal efficiency, further improving the utilization rate of electric energy and improving the operating efficiency of the ship's power system.

[0046] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the corresponding drawings of the description.

[0047] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0049] Figure 1 A structural block diagram of a power control system of an electric ship according to an embodiment of the present invention is shown;

[0050] Figure 2 A schematic flow chart of a method for electric energy-assisted regulation based on ship speed adjustment according to an embodiment of the present invention is shown;

[0051] Figure 3 A schematic flow chart of a power partitioning method based on a first power supply system efficiency model according to an embodiment of the present invention is shown;

[0052] Figure 4 A schematic flow chart of a power control method for an electric ship according to an embodiment of the present invention is shown;

[0053] Figure 5 A schematic structural diagram of a computing device according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0054] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0055] Figure 1 The structure block diagram of a power control system of an electric ship according to an embodiment of the present invention is shown, the system comprises: a data acquisition module 101, a speed comparison module 102, a power supply adjustment module 103 and an auxiliary adjustment module 104; wherein,

[0056] The data acquisition module 101 is used to collect the current relative flow velocity of the water flow, the current actual ship speed and the current still water ship speed.

[0057] Preferably, the current actual ship speed is determined based on a satellite positioning system;

[0058] The water flow sensor is used to monitor the relative flow velocity between the current water flow and the ship in real time, and the actual water flow velocity is calculated based on the current actual ship speed;

[0059] By obtaining the current power parameters of the ship's motor, the current still water ship speed is calculated.

[0060] The speed comparison module 102 is used to compare the current actual ship speed with the preset ship speed to obtain a comparison result, and determine the target still water ship speed based on the comparison result.

[0061] Specifically, by comparing the current actual ship speed with the preset ship speed, judging whether the actual ship speed is greater than the preset ship speed based on the difference between the two, a comparison result is obtained;

[0062] The target still water ship speed is calculated based on the preset ship speed and the actual water flow velocity;

[0063] Generate a ship speed adjustment instruction based on the target still water ship speed; where:

[0064] If the actual ship speed is greater than the preset ship speed, a ship speed reduction instruction is generated and issued; if the actual ship speed is less than the preset ship speed, a ship speed increase instruction is generated and issued.

[0065] The power supply adjustment module 103 is used to determine the target power parameters and target power supply parameters of the ship motor according to the target still water ship speed, and generate a power supply adjustment instruction to adjust the power supply parameters.

[0066] The auxiliary regulation module 104 is used to collect the electric energy generated by the ship motor or to perform power supply compensation for the ship motor according to the power supply adjustment instruction.

[0067] According to the present embodiment, a power control system of an electric ship is provided, comprising: a data acquisition module, a speed comparison module, a power supply adjustment module and an auxiliary adjustment module; wherein the data acquisition module is used to collect the current relative flow velocity of the water flow, the current actual ship speed and the current still water ship speed; the speed comparison module is used to compare the current actual ship speed with the preset ship speed to obtain a comparison result, and determine the target still water ship speed based on the comparison result; the power supply adjustment module is used to determine the target power parameters and target power supply parameters of the ship's motor according to the target still water ship speed, and generate a power supply adjustment instruction to adjust the power supply parameters; the auxiliary adjustment module is used to collect the electric energy generated by the ship's motor or perform power supply compensation on the ship's motor according to the power supply adjustment instruction. A power control system for an electric ship provided by the present embodiment obtains the current actual ship speed through a satellite positioning system, obtains the current relative flow velocity of the water flow through a sensor, and determines the current still water ship speed based on the power parameters of the current motor, thereby accurately calculating the actual water flow velocity, and accurately calculating the target still water ship speed in combination with the preset ship speed. At the same time, through the comparison result of the current actual ship speed and the preset ship speed, an instruction to increase or decrease the ship speed is determined and generated, thereby scientifically determining the target still water ship speed corresponding to the preset ship speed, accurately controlling the ship's running speed to make it meet the preset speed, and reducing the error of the running time. This can effectively improve the accuracy of predicting the departure and arrival times corresponding to the entire shipping process, and is also conducive to more accurate and reasonable scheduling of the port; based on the target net water speed, the corresponding motor power parameters are reversely calculated, and the target power supply parameters are further determined and adjustment instructions are generated. At the same time, during the power supply parameter adjustment process, when the ship slows down, the electric energy generated by the motor at this time is recovered, which effectively reduces the waste of electric energy and improves the utilization efficiency; when the ship speeds up, the ship's electric motor is compensated for power supply, so that it always remains in the best efficiency operating range, further improving the overall energy utilization efficiency and reducing environmental pollution.

[0068] Figure 2 FIG. 4 is a flow chart showing a method for adjusting electric energy-assisted ship speed according to an embodiment of the present invention. Figure 2 As shown, the method comprises the following steps:

[0069] Step S201, calculating target power parameters of the ship's motor based on the target still water ship speed.

[0070] Specifically, the target power parameters of the ship's motor are calculated according to the target still water ship speed; wherein the target power parameters at least include the output power of the motor.

[0071] Step S202: determining a target power supply parameter based on the target power parameter, and generating a power supply adjustment instruction based on the target power supply parameter.

[0072] Preferably, based on the output power of the motor, the corresponding power supply output power output by the power supply system when the motor reaches the output power is further calculated.

[0073] Step S203: Send the power supply adjustment instruction to the first power supply system of the ship to adjust the power supply parameters.

[0074] Specifically, when the ship speed needs to be reduced, the power supply parameter of the first power supply system is reduced to the target power supply parameter;

[0075] When the ship speed needs to be increased, the power output power that needs to be increased is determined according to the target power supply parameters, and the increased power output power is divided into a first increased power and a second increased power according to the power division ratio; the first power supply increase parameter is determined according to the first increased power, and the first power supply system is adjusted; a compensation increase instruction is generated according to the second increased power, and sent to the auxiliary adjustment module.

[0076] Preferably, the first power supply increase parameter may at least include an output voltage and an output current of the first power supply system.

[0077] Further, the auxiliary regulation module adjusts the working mode of the second power supply system according to the power supply adjustment parameter;

[0078] Specifically, when the ship speed needs to be reduced, the electric energy generated by the ship motor is collected and stored in the second power supply system;

[0079] When the ship speed needs to be increased, a compensation increase instruction is obtained, a compensation power supply parameter is determined according to the second increased power, and the second power supply system is controlled to perform compensation power supply.

[0080] According to the above method, the corresponding motor power parameters are reversely calculated based on the target clean water ship speed, and the target power supply parameters are further determined, and an adjustment instruction is generated so that the output provided by the power supply system just meets the target still water ship speed. At the same time, during the power supply parameter adjustment process, when the ship slows down, the electric energy generated by the motor at this time is recovered, which effectively reduces the waste of electric energy and improves the utilization efficiency; when the ship speeds up, the power output is allocated to the first power supply system and the second power supply system based on the power division ratio, and the output is compensated by the electric energy stored in the second power supply system. In the absence of additional electric energy, the efficiency reduction caused by the excessive output of the first power supply system is avoided, so that it is always kept in the optimal efficiency operating range, further improving the overall electric energy utilization efficiency, while reducing environmental pollution, improving the overall cruising range of the entire ship, and making the power supply system more reasonably used, ensuring the health of the power supply system and extending its service life.

[0081] Figure 3A schematic flow chart of a power partitioning method based on a first power supply system efficiency model according to an embodiment of the present invention is shown;

[0082] like Figure 3 As shown, the method comprises the following steps:

[0083] Step S301 : constructing a first power supply system efficiency model based on a prediction of a SOC value (State of Charge) of a battery of the first power supply system.

[0084] Preferably, the first power supply system efficiency model uses an extended Kalman filter to predict the SOC value of the first power supply system;

[0085] The state vector and observation vector are determined through the state transfer equation and observation method, and then the SOC value is predicted through iterative estimation using the extended Kalman filter (EKF) based on the recursive formula of the discretized terminal voltage; the recursive formula of the discretized terminal voltage is:

[0086]

[0087] Among them, V k is the terminal voltage; z [k] is the SOC value of the kth sampling point; OCV is the open circuit voltage; R1 is the polarization resistance value in the equivalent circuit of the second power supply system; is the current value flowing through the polarization resistor at the kth sampling point; R0 is the internal resistance in the equivalent circuit of the second power supply system; i [k] is the current value flowing through the internal resistance at the kth sampling point; [k+1] is the SOC value of the k+1th sampling point; Δt is the discretization step size; Q is the capacity of the second power supply system; wherein, when i>0, it indicates discharge.

[0088] Step S302: collect historical power supply parameters of the first power supply system, and train the first power supply system efficiency model based on the historical power supply parameters to obtain a trained first power supply system efficiency model.

[0089] Step S303, according to the first power supply system efficiency model and based on the SOC prediction value of the first power supply system, determining the optimal efficiency value of the first power supply system under the SOC prediction value, and further calculating the optimal power supply parameters corresponding to the optimal efficiency value.

[0090] Step S304: determine the power division ratio based on the optimal power supply parameters, and adjust the first power supply system and the second power supply system.

[0091] Specifically, when the ship speed needs to be increased, the power of the first power supply system and the second power supply system is divided according to the power division ratio determined by the optimal power supply parameters, and the corresponding power supply parameters are further adjusted.

[0092] According to the above method, by constructing the efficiency model of the first power supply system, using historical power supply parameters for training, determining the SOC prediction value based on current data, and further obtaining the optimal efficiency value of the first power supply system and its corresponding power supply parameters, the power division ratio is determined, which further improves the intelligence of the system, enables more accurate power division, and makes the power supply system at the optimal efficiency, further improves the utilization rate of electric energy, and improves the operating efficiency of the ship power system.

[0093] Figure 4 A schematic flow chart of a power control method for an electric ship according to an embodiment of the present invention is shown;

[0094] like Figure 4 As shown, the method comprises the following steps:

[0095] Step S401, collecting the current relative flow velocity of the water, the current actual ship speed and the current still water ship speed.

[0096] Specifically, the collecting of the current relative flow velocity, the current actual ship speed and the current still water ship speed further includes:

[0097] Determine the current actual ship speed based on the satellite positioning system;

[0098] The water flow sensor is used to monitor the relative flow velocity between the current water flow and the ship in real time, and the actual water flow velocity is calculated based on the current actual ship speed;

[0099] By obtaining the current power parameters of the ship's motor, the current still water ship speed is calculated.

[0100] Step S402, comparing the current actual ship speed with the preset ship speed to obtain a comparison result, and determining the target still water ship speed based on the comparison result.

[0101] Specifically, the current actual ship speed is compared with the preset ship speed to obtain a comparison result, and the target still water ship speed is determined based on the comparison result, further comprising:

[0102] By comparing the current actual ship speed with the preset ship speed, judging whether the actual ship speed is greater than the preset ship speed based on the size of the two, a comparison result is obtained;

[0103] The target still water ship speed is calculated based on the preset ship speed and the actual water flow velocity;

[0104] Generate a ship speed adjustment instruction based on the target still water ship speed; where:

[0105] If the actual ship speed is greater than the preset ship speed, a ship speed reduction instruction is generated and issued; if the actual ship speed is less than the preset ship speed, a ship speed increase instruction is generated and issued.

[0106] Step S403, determining the target power parameters and target power supply parameters of the ship's motor according to the target still water ship speed, and generating a power supply adjustment instruction to adjust the power supply parameters.

[0107] Specifically, the target power parameters and target power supply parameters of the ship motor are determined according to the target still water ship speed, and a power supply adjustment instruction is generated to adjust the power supply parameters, further comprising:

[0108] Calculate the target power parameters of the ship's motor based on the target still water ship speed;

[0109] Determining a target power supply parameter based on the target power parameter, and generating a power supply adjustment instruction based on the target power supply parameter;

[0110] Send the power supply adjustment command to the first power supply system of the ship to adjust the power supply parameters;

[0111] When the ship speed needs to be reduced, the power supply parameter of the first power supply system is reduced to the target power supply parameter;

[0112] When the ship speed needs to be increased, the power output power that needs to be increased is determined according to the target power supply parameters, and the increased power output power is divided into a first increased power and a second increased power according to the power division ratio; the first power supply increase parameter is determined according to the first increased power, and the first power supply system is adjusted; a compensation increase instruction is generated according to the second increased power, and sent to the auxiliary adjustment module.

[0113] Step S404: collecting the electric energy generated by the ship motor or performing power supply compensation on the ship motor according to the power supply adjustment instruction.

[0114] Specifically, the collecting of electric energy generated by the ship motor or performing power supply compensation on the ship motor according to the power supply adjustment instruction further includes:

[0115] When the ship speed needs to be reduced, the electric energy generated by the ship's electric motor is collected and stored in the second power supply system;

[0116] When the ship speed needs to be increased, a compensation increase instruction is obtained, a compensation power supply parameter is determined according to the second increased power, and the second power supply system is controlled to perform compensation power supply.

[0117] Specifically, based on the prediction of the SOC value of the first power supply system, a first power supply system efficiency model is constructed;

[0118] Collecting historical power supply parameters of the first power supply system, training the first power supply system efficiency model based on the historical power supply parameters, and obtaining a trained first power supply system efficiency model;

[0119] According to the first power supply system efficiency model, based on the SOC prediction value of the first power supply system, determine the optimal efficiency value of the first power supply system under the SOC prediction value, and further calculate the optimal power supply parameters corresponding to the optimal efficiency value;

[0120] A power division ratio is determined based on the optimal power supply parameters, and the first power supply system and the second power supply system are adjusted.

[0121] Preferably, the first power supply system efficiency model uses an extended Kalman filter to predict the SOC value of the first power supply system, and completes the prediction of the SOC value through iterative estimation based on the recursive formula of the discretized terminal voltage; wherein the recursive formula of the discretized terminal voltage is:

[0122]

[0123] Among them, V k is the terminal voltage; z [k] is the SOC value of the kth sampling point; OCV is the open circuit voltage; R1 is the polarization resistance value in the equivalent circuit of the second power supply system; is the current value flowing through the polarization resistor at the kth sampling point; R0 is the internal resistance in the equivalent circuit of the second power supply system; i [k] is the current value flowing through the internal resistance at the kth sampling point; [k+1] is the SOC value of the k+1th sampling point; Δt is the discretization step size; Q is the capacity of the second power supply system; wherein, i>0 indicates discharge.

[0124] According to a power control method for an electric ship provided in this embodiment, the current relative flow velocity of the water flow, the current actual ship speed and the current still water ship speed are collected; the current actual ship speed is compared with the preset ship speed to obtain a comparison result, and the target still water ship speed is determined based on the comparison result; according to the target still water ship speed, the target power parameters and target power supply parameters of the ship's electric motor are determined, and a power supply adjustment instruction is generated to adjust the power supply parameters; according to the power supply adjustment instruction, the electric energy generated by the ship's electric motor is collected or the ship's electric motor is compensated for power supply. A power control method for an electric ship provided by the present embodiment obtains the current actual ship speed through a satellite positioning system, obtains the current relative flow velocity of the water flow through a sensor, and determines the current still water ship speed based on the power parameters of the current motor, thereby accurately calculating the actual water flow velocity, and accurately calculating the target still water ship speed in combination with the preset ship speed. At the same time, through the comparison result of the current actual ship speed and the preset ship speed, an instruction to increase or decrease the ship speed is determined and generated, thereby scientifically determining the target still water ship speed corresponding to the preset ship speed, accurately controlling the ship's operating speed to make it meet the preset speed, reducing the error of the operating time, and thereby effectively improving the accuracy of predicting the departure and arrival times corresponding to the entire shipping process, which is also conducive to more accurate and reasonable scheduling of the port; the corresponding motor power parameters are reversely calculated based on the target net water ship speed , and further determine the target power supply parameters, and generate adjustment instructions so that the output provided by the power supply system just meets the target still water ship speed. At the same time, during the power supply parameter adjustment process, when the ship slows down, the electric energy generated by the motor at this time is recovered, which effectively reduces the waste of electric energy and improves the use efficiency; when the ship speeds up, the power output is allocated to the first power supply system and the second power supply system based on the power division ratio, and the output is compensated by the electric energy stored in the second power supply system. In the absence of additional electric energy, the efficiency reduction caused by the excessive output of the first power supply system is avoided, so that it is always kept in the best efficiency operating range, further improving the overall power utilization efficiency, while reducing environmental pollution, improving the overall cruising range of the entire ship, and making the power supply system more reasonably used, ensuring the health of the power supply system and extending its service life. In addition, by constructing the efficiency model of the first power supply system, using historical power supply parameters for training, determining the SOC prediction value based on current data, and further obtaining the optimal efficiency value of the first power supply system and its corresponding power supply parameters, the power division ratio is determined, which further improves the intelligence of the system, enables more accurate power division, and enables the power supply system to be at optimal efficiency, further improving the utilization rate of electric energy and improving the operating efficiency of the ship's power system.

[0125] The present invention also provides a non-volatile computer storage medium, which stores at least one executable instruction, and the executable instruction can execute the operations that can be achieved by a power control system of an electric ship in any of the above system embodiments.

[0126] Figure 5 A schematic diagram of the structure of a computing device according to an embodiment of the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the computing device.

[0127] like Figure 5 As shown, the computing device may include: a processor (processor) 502 , a communications interface (Communications Interface) 504 , a memory (memory) 506 , and a communication bus 508 .

[0128] in:

[0129] The processor 502 , the communication interface 504 , and the memory 506 communicate with each other via a communication bus 508 .

[0130] The communication interface 504 is used to communicate with other devices such as clients or other servers.

[0131] The processor 502 is used to execute the program 510, and specifically can execute the operations that can be realized by a power control system of an electric ship in the above-mentioned embodiment of a power control system of an electric ship.

[0132] Specifically, the program 510 may include program codes, and the program codes include computer operation instructions.

[0133] The processor 502 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention. The one or more processors included in the computing device may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0134] The memory 506 is used to store the program 510. The memory 506 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0135] The program 510 can be specifically used to enable the processor 502 to perform operations that can be implemented by a power control system of an electric ship in any of the above-mentioned system embodiments. The specific implementation of each step in the program 510 can refer to the corresponding descriptions in the corresponding steps and units in the above-mentioned power control system embodiment of an electric ship, and will not be repeated here. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the above-described devices and modules can refer to the corresponding process description in the above-mentioned method embodiment, and will not be repeated here.

[0136] The algorithm and display provided herein are not inherently related to any particular computer, virtual system or other device. Various general purpose systems can also be used together with the teachings based on this. According to the above description, it is obvious that the structure required for constructing such systems. In addition, the present invention is not directed to any specific programming language either. It should be understood that various programming languages ​​can be utilized to realize the content of the present invention described herein, and the description of the above specific languages ​​is for disclosing the best mode of the present invention.

[0137] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0138] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all of the features of the individual embodiments previously disclosed. Therefore, the claims that follow the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0139] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0140] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0141] The various component embodiments of the present invention can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or digital signal processor (DSP) can be used in practice to implement some or all of the functions of some or all of the components in the embodiments of the present invention. The present invention can also be implemented as a device or apparatus program (e.g., computer program and computer program product) for executing part or all of the methods described herein. Such a program implementing the present invention can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0142] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A power control system for an electric ship, comprising: Data acquisition module, speed comparison module, power supply adjustment module and auxiliary adjustment module; among them, The data acquisition module is used to collect the current relative flow velocity of the water flow, the current actual ship speed and the current still water ship speed; The speed comparison module is used to compare the current actual ship speed with the preset ship speed to obtain a comparison result, and determine the target still water ship speed based on the comparison result; The power supply adjustment module is used to determine the target power parameters and target power supply parameters of the ship motor according to the target still water ship speed, and generate a power supply adjustment instruction to adjust the power supply parameters; The auxiliary regulation module is used to collect the electric energy generated by the ship motor or to perform power supply compensation for the ship motor according to the power supply adjustment instruction.

2. A power control system for an electric ship according to claim 1, characterized in that: The data acquisition module is further used for: Determine the current actual ship speed based on the satellite positioning system; The water flow sensor is used to monitor the relative flow velocity between the current water flow and the ship in real time, and the actual water flow velocity is calculated based on the current actual ship speed; By obtaining the current power parameters of the ship's motor, the current still water ship speed is calculated.

3. The power control system of an electric ship according to claim 1, characterized in that: The speed comparison module is further used for: By comparing the current actual ship speed with the preset ship speed, judging whether the actual ship speed is greater than the preset ship speed based on the size of the two, a comparison result is obtained; The target still water ship speed is calculated based on the preset ship speed and the actual water flow velocity; Generate a ship speed adjustment instruction based on the target still water ship speed; If the actual ship speed is greater than the preset ship speed, a ship speed reduction instruction is generated and issued; if the actual ship speed is less than the preset ship speed, a ship speed increase instruction is generated and issued.

4. The power control system of an electric ship according to claim 1, characterized in that: The power supply adjustment module is further used for: Calculate the target power parameters of the ship's motor based on the target still water ship speed; Determining a target power supply parameter based on the target power parameter, and generating a power supply adjustment instruction based on the target power supply parameter; Send the power supply adjustment command to the first power supply system of the ship to adjust the power supply parameters; When the ship speed needs to be reduced, the power supply parameter of the first power supply system is reduced to the target power supply parameter; When the ship speed needs to be increased, the power output power that needs to be increased is determined according to the target power supply parameters, and the increased power output power is divided into a first increased power and a second increased power according to the power division ratio; the first power supply increase parameter is determined according to the first increased power, and the first power supply system is adjusted; a compensation increase instruction is generated according to the second increased power, and sent to the auxiliary adjustment module.

5. The power control system of an electric ship according to claim 4, characterized in that: The auxiliary adjustment module is further used for: When the ship speed needs to be reduced, the electric energy generated by the ship's electric motor is collected and stored in the second power supply system; When the ship speed needs to be increased, a compensation increase instruction is obtained, a compensation power supply parameter is determined according to the second increased power, and the second power supply system is controlled to perform compensation power supply.

6. The power control system of an electric ship according to claim 1, characterized in that: The auxiliary adjustment module is further used for: Based on the prediction of the SOC value of the first power supply system, constructing an efficiency model of the first power supply system; Collecting historical power supply parameters of the first power supply system, training the first power supply system efficiency model based on the historical power supply parameters, and obtaining a trained first power supply system efficiency model; According to the first power supply system efficiency model, based on the SOC prediction value of the first power supply system, determine the optimal efficiency value of the first power supply system under the SOC prediction value, and further calculate the optimal power supply parameters corresponding to the optimal efficiency value; A power division ratio is determined based on the optimal power supply parameters, and the first power supply system and the second power supply system are adjusted.

7. A power control system for an electric ship according to claim 6, characterized in that: The auxiliary adjustment module is further used for: The first power supply system efficiency model uses the extended Kalman filter to predict the SOC value of the first power supply system. Based on the recursive formula of the discretized terminal voltage, the SOC value is predicted through iterative estimation. The recursive formula of the discretized terminal voltage is: Among them, V k is the terminal voltage; z [k] is the SOC value of the kth sampling point; OCV is the open circuit voltage; R1 is the polarization resistance value in the equivalent circuit of the second power supply system; is the current value flowing through the polarization resistor at the kth sampling point; R0 is the internal resistance in the equivalent circuit of the second power supply system; i [k] is the current value flowing through the internal resistance at the kth sampling point; [k+1] is the SOC value of the k+1th sampling point; Δt is the discretization step size; Q is the capacity of the second power supply system; wherein, i>0 indicates discharge.

8. A power control method for an electric ship, comprising: Collect the current relative flow velocity, current actual ship speed and current still water ship speed; Compare the current actual ship speed with the preset ship speed to obtain a comparison result, and determine the target still water ship speed based on the comparison result; According to the target still water ship speed, the target power parameters and target power supply parameters of the ship motor are determined, and a power supply adjustment instruction is generated to adjust the power supply parameters; According to the power supply adjustment instruction, the electric energy generated by the ship's electric motor is collected or the power supply of the ship's electric motor is compensated.

9. A computing device comprising: A processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the operation implemented by the power control system of an electric ship as described in any one of claims 1-7.

10. A computer storage medium, wherein at least one executable instruction is stored in the storage medium, and wherein the executable instruction enables a processor to execute the operation implemented by the power control system of an electric ship as claimed in any one of claims 1 to 7.

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