Ship composite energy storage system power fluctuation stabilizing control method and device and electronic equipment

Abstract

The invention provides a ship composite energy storage system power fluctuation stabilizing control method and device and electronic equipment, and relates to the technical field of ship control. Judging a ship load condition based on the ship propulsion power; and performing power fluctuation stabilizing control on the ship load condition through a multi-port bidirectional DC / DC converter of the ship composite energy storage system. The stability of a ship power system is improved, the service life of an energy storage element is prolonged through fine charge state management, and it is ensured that the ship can operate efficiently and stably under various load conditions.

Description

Technical Field

[0001] The present invention relates to the field of ship control technology, and in particular to a power fluctuation smoothing control method, device and electronic equipment for a ship composite energy storage system. Background Art

[0002] With the rapid development of modern power electronics technology, control theory technology, new energy technology, energy storage technology and other related fields, the ship power system and the power system have gradually merged, forming the concept of "integrated electric propulsion" and "integrated power system". This revolutionary change enables all power needs of ships, including propulsion devices, auxiliary equipment and special operating devices, to be uniformly dispatched and distributed through electric energy. This system not only improves the maneuverability and reliability of ships, but also significantly enhances energy conservation and environmental protection effects, optimizes operating efficiency and economy, and is therefore widely used in various types of ships with multiple working conditions and frequent load changes.

[0003] However, in the integrated power system of ships, the electric energy required for navigation or operation is usually provided by multiple generator sets in a network, and is uniformly managed and distributed by the power management system (PMS). Since the fuel consumption of diesel generators is the lowest at about 80% load, which is called the optimal operating point, controlling the diesel engine to work near this operating point becomes the key to reducing fuel consumption and emissions. However, when the operating conditions or loads change, it will cause fluctuations in the load and speed of the generator set, which will lead to problems such as reduced system power quality, increased vibration and noise, and reduced system energy efficiency.

[0004] In order to solve these problems, the existing technology mainly uses the power management system (PMS) to adjust the number of diesel generator sets in the network according to load changes, so as to make the generator sets in the network work as close to the optimal operating point as possible under the current working conditions. However, this control method has the disadvantages of slow dynamic response and unsatisfactory effect on smoothing the power fluctuation of the integrated power system.

[0005] Therefore, a method, device and electronic equipment for smoothing power fluctuations of a ship composite energy storage system are proposed. Summary of the invention

[0006] The present specification provides a power fluctuation smoothing control method, device and electronic equipment for a ship composite energy storage system, which not only improves the stability of the ship's power system, but also extends the service life of the energy storage element through sophisticated charge state management, ensuring that the ship can maintain efficient and stable operation under various load conditions.

[0007] This specification provides a power fluctuation smoothing control method for a ship composite energy storage system, comprising:

[0008] Obtain ship propulsion power;

[0009] Determining the load condition of the ship based on the propulsion power of the ship;

[0010] The multi-port bidirectional DC / DC converter of the ship composite energy storage system is used to control power fluctuation smoothing according to the ship load condition.

[0011] Optionally, the multi-port bidirectional DC / DC converter of the ship composite energy storage system performs power fluctuation smoothing control according to the ship load condition, including:

[0012] P HESS (t) = P0(t) - P′0(t)

[0013] Among them, P HESS (t) is the real-time energy of the ship's composite energy storage system, P0(t) is the ship's propulsion power, and P′0(t) is the stable power after smoothing control of the ship's composite energy storage system.

[0014] Optionally, the multi-port bidirectional DC / DC converter of the ship composite energy storage system performs power fluctuation smoothing control according to the ship load condition, including:

[0015] The ship composite energy storage system includes batteries and supercapacitors;

[0016] When it is determined that the ship load is light based on the ship propulsion power, the battery and / or the supercapacitor are charged to absorb the ship propulsion power to achieve power fluctuation smoothing control;

[0017] When it is determined that the ship load is overloaded based on the ship propulsion power, the battery and / or the supercapacitor is discharged to compensate for the ship propulsion power, so as to achieve power fluctuation smoothing control.

[0018] Optionally, also include:

[0019] Performing charging and discharging detection on the battery and / or the supercapacitor by means of a state of charge detector to determine the state of charge;

[0020] The charging and discharging of the battery and / or the super capacitor are controlled to end based on the state of charge.

[0021] Optionally, the performing charging and discharging detection on the battery and / or the supercapacitor by a state of charge detector to determine the state of charge includes:

[0022]

[0023] Among them, SOC is the state of charge, E ini is the initial capacity of the ship composite energy storage system before charging and discharging, ηch is the charging efficiency of the ship composite energy storage system, η dis is the discharge efficiency of the ship composite energy storage system, P ch is the charging power of the ship composite energy storage system, P dis is the discharge power of the ship composite energy storage system, t is the charging and discharging time, E r is the rated capacity of the ship's composite energy storage system.

[0024] Optionally, the charging and discharging model of the battery and the charging and discharging model of the supercapacitor include:

[0025]

[0026] Among them, SOC b (t) is the state of charge of the battery at the current sampling point, SOC c (t) is the state of charge of the supercapacitor at the current sampling point, SOC b (t-1) is the state of charge of the battery at the previous sampling point, SOC c (t-1) is the charge state of the supercapacitor at the previous sampling point, P b (t)<0 is the charging state of the battery, P b (t)≥0 is the discharge state of the battery, P c (t)<0 is the charging state of the supercapacitor, P c (t)≥0 is the discharge state of the supercapacitor.

[0027] Optionally, also include:

[0028] The state quantity of the battery is recorded based on the charging and discharging state of the battery, specifically:

[0029]

[0030] A charging time of the battery is determined based on the charging state of the battery, and a discharging time of the battery is determined based on the discharging state of the battery.

[0031] This specification provides a power fluctuation smoothing control device for a ship composite energy storage system, comprising

[0032] An acquisition module, used for acquiring ship propulsion power;

[0033] A judging module, used for judging the load condition of the ship based on the propulsion power of the ship;

[0034] The control module is used to perform power fluctuation smoothing control according to the ship load condition through a multi-port bidirectional DC / DC converter of the ship composite energy storage system.

[0035] Optionally, the controlled modules include:

[0036] P HESS (t) = P0(t) - P′0(t)

[0037] Among them, P HESS (t) is the real-time energy of the ship's composite energy storage system, P0(t) is the ship's propulsion power, and P′0(t) is the stable power after smoothing control of the ship's composite energy storage system.

[0038] Optionally, the control module includes:

[0039] The ship composite energy storage system includes batteries and supercapacitors;

[0040] When it is determined that the ship load is light based on the ship propulsion power, the battery and / or the supercapacitor are charged to absorb the ship propulsion power to achieve power fluctuation smoothing control;

[0041] When it is determined that the ship load is overloaded based on the ship propulsion power, the battery and / or the supercapacitor is discharged to compensate for the ship propulsion power, so as to achieve power fluctuation smoothing control.

[0042] Optionally, also include:

[0043] Performing charging and discharging detection on the battery and / or the supercapacitor by means of a state of charge detector to determine the state of charge;

[0044] The charging and discharging of the battery and / or the super capacitor are controlled to end based on the state of charge.

[0045] Optionally, the performing charging and discharging detection on the battery and / or the supercapacitor by a state of charge detector to determine the state of charge includes:

[0046]

[0047] Among them, SOC is the state of charge, E ini is the initial capacity of the ship composite energy storage system before charging and discharging, η ch is the charging efficiency of the ship composite energy storage system, η dis is the discharge efficiency of the ship composite energy storage system, P ch is the charging power of the ship composite energy storage system, P dis is the discharge power of the ship composite energy storage system, t is the charging and discharging time, E r is the rated capacity of the ship's composite energy storage system.

[0048] Optionally, the charging and discharging model of the battery and the charging and discharging model of the supercapacitor include:

[0049]

[0050] Among them, SOC b (t) is the state of charge of the battery at the current sampling point, SOC c (t) is the state of charge of the supercapacitor at the current sampling point, SOC b (t-1) is the state of charge of the battery at the previous sampling point, SOC c (t-1) is the charge state of the supercapacitor at the previous sampling point, P b (t)<0 is the charging state of the battery, P b (t)≥0 is the discharge state of the battery, P c (t)<0 is the charging state of the supercapacitor, P c (t)≥0 is the discharge state of the supercapacitor.

[0051] Optionally, also include:

[0052] The state quantity of the battery is recorded based on the charging and discharging state of the battery, specifically:

[0053]

[0054] A charging time of the battery is determined based on the charging state of the battery, and a discharging time of the battery is determined based on the discharging state of the battery.

[0055] This specification also provides an electronic device, wherein the electronic device includes:

[0056] processor; and,

[0057] A memory storing computer executable instructions, which when executed cause the processor to perform any of the above methods.

[0058] The present specification also provides a computer-readable storage medium, wherein the computer-readable storage medium stores one or more programs, and when the one or more programs are executed by a processor, any of the above methods is implemented.

[0059] In this manual, the multi-port bidirectional DC / DC converter intelligently adjusts the charge and discharge state of the battery and supercapacitor to effectively smooth the fluctuation of the ship's propulsion power, which not only improves the stability of the ship's power system, but also extends the service life of the energy storage components through fine charge state management, ensuring that the ship can maintain efficient and stable operation under various load conditions. In addition, it also combines advanced charging and discharging models to accurately track the charge state of the battery and supercapacitor, further optimize the energy management strategy, and improve the energy efficiency and economy of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0061] Figure 1 A schematic diagram of the principle of a power fluctuation smoothing control method for a ship composite energy storage system provided in an embodiment of this specification;

[0062] Figure 2 A schematic diagram of the power fluctuation smoothing control principle of a ship composite energy storage system provided in the embodiments of this specification;

[0063] Figure 3 A schematic diagram of the principle of a power fluctuation smoothing control device for a ship composite energy storage system provided in an embodiment of this specification;

[0064] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of this specification;

[0065] Figure 5 A schematic diagram of a computer-readable medium provided in accordance with an embodiment of the present specification. DETAILED DESCRIPTION

[0066] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0067] The following is combined with Figure 1-5The exemplary embodiments of the present invention are described more fully. However, the exemplary embodiments can be implemented in various forms, and it should not be understood that the present invention is limited to the embodiments set forth herein. On the contrary, providing these exemplary embodiments can make the present invention more comprehensive and complete, and it is more convenient to fully convey the inventive concept to those skilled in the art. The same reference numerals in the figures represent the same or similar elements, components or parts, and thus their repeated description will be omitted.

[0068] Under the premise of being consistent with the technical concept of the present invention, the features, structures, characteristics or other details described in a specific embodiment do not exclude that they can be combined in one or more other embodiments in a suitable manner.

[0069] In the description of specific embodiments, the features, structures, characteristics or other details described in the present invention are intended to enable those skilled in the art to fully understand the embodiments. However, it does not exclude that those skilled in the art can practice the technical solutions of the present invention without one or more of the specific features, structures, characteristics or other details.

[0070] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0071] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0072] The term "and / or" or "and / or" includes all combinations of any one or more of the associated listed items.

[0073] Figure 1 A schematic diagram of a power fluctuation control method for a ship composite energy storage system provided in an embodiment of this specification, the method may include:

[0074] S110: Obtaining ship propulsion power;

[0075] S120: Determining a ship load condition based on the ship propulsion power;

[0076] S130: Performing power fluctuation smoothing control according to the ship load condition through a multi-port bidirectional DC / DC converter of the ship composite energy storage system.

[0077] In the specific implementation of this specification, the ship propulsion power is obtained through the sensor and data acquisition system of the ship power system. The propulsion power is the power provided by the ship propulsion system, which is related to various factors such as the ship's sailing speed, hull resistance, load conditions, etc. The load conditions of the ship can be roughly divided into light load, medium load and heavy load. The multi-port bidirectional DC / DC converter can realize the energy exchange between energy storage devices of different voltage levels, as well as the bidirectional energy flow between the energy storage device and the ship's power grid, and has the characteristics of high conversion efficiency, fast response and flexible control.

[0078] Based on the load conditions of the ship, the composite energy storage system uses a multi-port bidirectional DC / DC converter to smooth power fluctuations. Specifically: When the ship is in a light-loaded state, the power provided by the propulsion system is greater than the actual demand. It is charged through a multi-port bidirectional DC / DC converter to absorb excess energy, which not only avoids energy waste, but also reserves energy for subsequent heavy-load states. When the ship is in a heavy-loaded state, the power provided by the propulsion system may not meet the actual demand. It is discharged through a multi-port bidirectional DC / DC converter to release the previously stored energy to make up for the insufficient power. This can ensure that the ship can still maintain a stable sailing speed and performance under heavy load conditions.

[0079] Through the above methods, the fluctuation of ship load power can be effectively smoothed, energy utilization efficiency can be improved, and the service life of the ship power system can be extended. At the same time, it can also provide ships with a more flexible and reliable energy supply solution.

[0080] Optionally, the S130 includes:

[0081] P HESS (t) = P0(t) - P′0(t)

[0082] Among them, P HESS (t) is the real-time energy of the ship's composite energy storage system, P0(t) is the ship's propulsion power, and P′0(t) is the stable power after smoothing control of the ship's composite energy storage system.

[0083] In the specific implementation of this specification, Figure 2 As shown in Figure 1, propulsion power is the power provided by the ship's power system, which directly determines the ship's sailing speed and performance. The measurement of propulsion power is usually achieved through sensors installed on the propulsion system.

[0084] Optionally, the S130 includes:

[0085] The ship composite energy storage system includes batteries and supercapacitors;

[0086] When it is determined that the ship load is light based on the ship propulsion power, the battery and / or the supercapacitor are charged to absorb the ship propulsion power to achieve power fluctuation smoothing control;

[0087] When it is determined that the ship load is overloaded based on the ship propulsion power, the battery and / or the supercapacitor is discharged to compensate for the ship propulsion power, so as to achieve power fluctuation smoothing control.

[0088] In the specific implementation of this specification, the battery is one of the main energy storage elements in the composite energy storage system, with high energy density and relatively stable energy storage performance. It can store a large amount of energy for a long time and slowly release it when needed, providing stable power support for the ship. Supercapacitors are known for their high power density and fast charging and discharging capabilities. It can absorb or release a large amount of energy in a very short time, which has significant advantages in coping with instantaneous changes in ship loads.

[0089] When the ship is judged to be in a light-load state based on the ship's propulsion power, it means that the propulsion power currently required by the ship is lower than the maximum power that its power system can provide. At this time, the composite energy storage system can play its energy storage role and achieve power fluctuation smoothing control in the following ways: 1) Use the excess propulsion power to charge the battery and store the energy for later use. This not only avoids energy waste, but also improves the utilization rate and life of the battery. 2) In the light-load state, if the propulsion power fluctuates greatly, the supercapacitor can quickly absorb this instantaneous excess energy, thereby stabilizing the voltage and frequency of the ship's power system.

[0090] When a ship is overloaded, the power required by the propulsion system may exceed the maximum output power of the current power system. At this time, the composite energy storage system can release the stored energy in the following ways to make up for the lack of propulsion power: 1) The battery can slowly release its stored energy to provide additional power support for the ship. This helps to ensure that the ship can maintain a stable sailing speed and performance under heavy load. 2) In the case of heavy load and rapid response, the supercapacitor can quickly release its stored energy to cope with the instantaneous increase in the ship's load. This helps to reduce the voltage fluctuations and frequency deviations of the power system and improve the navigation safety of the ship.

[0091] Optionally, also include:

[0092] Performing charging and discharging detection on the battery and / or the supercapacitor by means of a state of charge detector to determine the state of charge;

[0093] The charging and discharging of the battery and / or the super capacitor are controlled to end based on the state of charge.

[0094] In the specific implementation of this specification, the state of charge detector is a device specifically used to measure the remaining capacity of the energy storage device. It calculates the current state of charge by monitoring the voltage, current, temperature and other parameters of the energy storage device using a specific algorithm or model. This state is usually expressed in the form of a percentage, reflecting the ratio between the energy stored in the energy storage device and its total capacity.

[0095] In the ship composite energy storage system, the state of charge detector is not only used to monitor the current state of charge of the energy storage device, but also to detect its charging and discharging process. By measuring the voltage and current changes during charging or discharging in real time, the energy inflow or outflow of the energy storage device can be calculated, thereby updating its state of charge.

[0096] When the state of charge of the battery or supercapacitor is detected to be lower than the preset charging threshold, the charging process is started. During the charging process, the change of the state of charge is continuously monitored, and the charging rate is adjusted as needed to avoid overcharging or overheating. When the state of charge reaches the preset charging end threshold, the charging process is stopped.

[0097] When the ship load demand is detected to increase and the state of charge of the battery or supercapacitor is higher than the preset discharge threshold, the discharge process is started. During the discharge process, it is also necessary to continuously monitor the change of the state of charge and adjust the discharge rate according to the load demand. When the state of charge drops below the preset discharge end threshold, the discharge process is stopped to avoid damage to the energy storage device due to over-discharge.

[0098] By using a state of charge detector to detect the charging and discharging of batteries and / or supercapacitors, the current energy status of these energy storage devices can be obtained in real time, so that their charging and discharging processes can be controlled based on this information to maintain the stability and reliability of the system.

[0099] Optionally, the performing charging and discharging detection on the battery and / or the supercapacitor by a state of charge detector to determine the state of charge includes:

[0100]

[0101] Among them, SOC is the state of charge, E ini is the initial capacity of the ship composite energy storage system before charging and discharging, η ch is the charging efficiency of the ship composite energy storage system, η dis is the discharge efficiency of the ship composite energy storage system, P ch is the charging power of the ship composite energy storage system, P dis is the discharge power of the ship composite energy storage system, t is the charging and discharging time, E r is the rated capacity of the ship's composite energy storage system.

[0102] In the specific implementation of this specification, the charging and discharging efficiency of the battery is generally between 70% and 95%, while the charging and discharging efficiency of the supercapacitor is close to 95%. These efficiency values ​​reflect the energy conversion efficiency during the charging and discharging process, that is, the ratio between the input or output energy and the actual stored or released energy of the energy storage device.

[0103] Optionally, the charging and discharging model of the battery and the charging and discharging model of the supercapacitor include:

[0104]

[0105] Among them, SOC b (t) is the state of charge of the battery at the current sampling point, SOC c (t) is the state of charge of the supercapacitor at the current sampling point, SOC b (t-1) is the state of charge of the battery at the previous sampling point, SOC c (t-1) is the charge state of the supercapacitor at the previous sampling point, P b (t)<0 is the charging state of the battery, P b (t)≥0 is the discharge state of the battery, P c (t)<0 is the charging state of the supercapacitor, P c (t)≥0 is the discharge state of the supercapacitor.

[0106] In the specific implementation of this specification, the above model can be used to simulate the charge state changes of batteries and supercapacitors at continuous time sampling points, and provide a basis for energy management of ship composite energy storage systems.

[0107] Optionally, also include:

[0108] The state quantity of the battery is recorded based on the charging and discharging state of the battery, specifically:

[0109]

[0110] A charging time of the battery is determined based on the charging state of the battery, and a discharging time of the battery is determined based on the discharging state of the battery.

[0111] In the specific implementation of this specification, in the composite energy storage device composed of supercapacitors and batteries, the batteries and supercapacitors have different charging and discharging characteristics and service life due to their different energy storage mechanisms. Batteries store and release energy through chemical reactions, while supercapacitors achieve this through physical reactions (i.e., the accumulation and dissipation of charges on the electrode surface).

[0112] For batteries, their service life is indeed closely related to the number of charge and discharge cycles. Each charge and discharge cycle triggers a chemical reaction, which gradually leads to the degradation of the internal structure of the battery and the decline of performance. Therefore, reducing the number of charge and discharge cycles of the battery is one of the effective strategies to extend its service life.

[0113] To further optimize the use of batteries, the high power density and fast charge and discharge capabilities of supercapacitors can also be combined. In situations where load demand is high or changes rapidly, supercapacitors can be used first to provide energy or absorb excess energy, thereby reducing the need for battery charge and discharge and extending its service life.

[0114] By introducing the charge and discharge state quantity and combining the complementary characteristics of supercapacitors and batteries, the energy flow in the composite energy storage device can be managed more effectively, the battery usage strategy can be optimized, and its service life can be extended.

[0115] In this manual, the multi-port bidirectional DC / DC converter intelligently adjusts the charge and discharge state of the battery and supercapacitor to effectively smooth the fluctuation of the ship's propulsion power, which not only improves the stability of the ship's power system, but also extends the service life of the energy storage components through fine charge state management, ensuring that the ship can maintain efficient and stable operation under various load conditions. In addition, it also combines advanced charging and discharging models to accurately track the charge state of the battery and supercapacitor, further optimize the energy management strategy, and improve the energy efficiency and economy of the overall system.

[0116] Figure 3 A schematic diagram of a power fluctuation smoothing control device for a ship composite energy storage system provided in an embodiment of this specification, the device may include:

[0117] An acquisition module 10 is used to acquire the propulsion power of the ship;

[0118] A judging module 20, configured to judge a ship load condition based on the ship propulsion power;

[0119] The control module 30 is used to perform power fluctuation smoothing control according to the ship load condition through the multi-port bidirectional DC / DC converter of the ship composite energy storage system.

[0120] Optionally, the controlled module 30 includes:

[0121] P HESS (t) = P0(t) - P′0(t)

[0122] Among them, P HESS(t) is the real-time energy of the ship's composite energy storage system, P0(t) is the ship's propulsion power, and P′0(t) is the stable power after smoothing control of the ship's composite energy storage system.

[0123] Optionally, the control module 30 includes:

[0124] The ship composite energy storage system includes batteries and supercapacitors;

[0125] When it is determined that the ship load is light based on the ship propulsion power, the battery and / or the supercapacitor are charged to absorb the ship propulsion power to achieve power fluctuation smoothing control;

[0126] When it is determined that the ship load is overloaded based on the ship propulsion power, the battery and / or the supercapacitor is discharged to compensate for the ship propulsion power, so as to achieve power fluctuation smoothing control.

[0127] Optionally, also include:

[0128] Performing charging and discharging detection on the battery and / or the supercapacitor by means of a state of charge detector to determine the state of charge;

[0129] The charging and discharging of the battery and / or the super capacitor are controlled to end based on the state of charge.

[0130] Optionally, the performing charging and discharging detection on the battery and / or the supercapacitor by a state of charge detector to determine the state of charge includes:

[0131]

[0132] Among them, SOC is the state of charge, E ini is the initial capacity of the ship composite energy storage system before charging and discharging, η ch is the charging efficiency of the ship composite energy storage system, η dis is the discharge efficiency of the ship composite energy storage system, P ch is the charging power of the ship composite energy storage system, P dis is the discharge power of the ship composite energy storage system, t is the charging and discharging time, E r is the rated capacity of the ship's composite energy storage system.

[0133] Optionally, the charging and discharging model of the battery and the charging and discharging model of the supercapacitor include:

[0134]

[0135] Among them, SOC b (t) is the state of charge of the battery at the current sampling point, SOCc (t) is the state of charge of the supercapacitor at the current sampling point, SOC b (t-1) is the state of charge of the battery at the previous sampling point, SOC c (t-1) is the charge state of the supercapacitor at the previous sampling point, P b (t)<0 is the charging state of the battery, P b (t)≥0 is the discharge state of the battery, P c (t)<0 is the charging state of the supercapacitor, P c (t)≥0 is the discharge state of the supercapacitor.

[0136] Optionally, also include:

[0137] The state quantity of the battery is recorded based on the charging and discharging state of the battery, specifically:

[0138]

[0139] A charging time of the battery is determined based on the charging state of the battery, and a discharging time of the battery is determined based on the discharging state of the battery.

[0140] The functions of the device in the embodiment of the present invention have been described in the above method embodiment, so for details not provided in the description of this embodiment, please refer to the relevant description in the above embodiment, and no further description will be given here.

[0141] Based on the same inventive concept, an embodiment of this specification also provides an electronic device.

[0142] The following describes an electronic device embodiment of the present invention, which can be regarded as a specific physical implementation of the method and device embodiments of the present invention. The details described in the electronic device embodiment of the present invention should be regarded as a supplement to the above method or device embodiments; details not disclosed in the electronic device embodiment of the present invention can be implemented with reference to the above method or device embodiments.

[0143] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this specification. Figure 4 The electronic device 300 according to the embodiment of the present invention is described. Figure 4 The electronic device 300 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0144] like Figure 4As shown, the electronic device 300 is in the form of a general computing device. The components of the electronic device 300 may include, but are not limited to: at least one processing unit 310, at least one storage unit 320, a bus 330 connecting different system components (including the storage unit 320 and the processing unit 310), a display unit 340, etc.

[0145] The storage unit stores program codes, which can be executed by the processing unit 310, so that the processing unit 310 performs the steps according to various exemplary embodiments of the present invention described in the above processing method section of this specification. For example, the processing unit 310 can perform the following steps: Figure 1 Steps shown.

[0146] The storage unit 320 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 3201 and / or a cache memory unit 3202 , and may further include a read-only memory unit (ROM) 3203 .

[0147] The storage unit 320 may also include a program / utility 3204 having a set (at least one) of program modules 3205, such program modules 3205 including but not limited to: an operating system, one or more application programs, other program modules and program data, each of which or some combination may include the implementation of a network environment.

[0148] Bus 330 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0149] The electronic device 300 may also communicate with one or more external devices 400 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), one or more devices that enable viewers to interact with the electronic device 300, and / or any device that enables the electronic device 300 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed through an input / output (I / O) interface 350. Furthermore, the electronic device 300 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 360. The network adapter 360 may communicate with other modules of the electronic device 300 through the bus 330. It should be understood that although Figure 4Not shown, other hardware and / or software modules may be used in conjunction with the electronic device 300, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0150] Through the description of the above implementation methods, it is easy for those skilled in the art to understand that the exemplary embodiments described in the present invention can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation method of the present invention can be embodied in the form of a software product, which can be stored in a computer-readable storage medium (which can be a CD-ROM, USB flash drive, mobile hard disk, etc.) or on a network, including a number of instructions to enable a computing device (which can be a personal computer, server, or network device, etc.) to execute the above method according to the present invention. When the computer program is executed by a data processing device, the computer-readable medium can implement the above method of the present invention, that is: Figure 1 The method shown.

[0151] Figure 5 A schematic diagram of a computer-readable medium provided in accordance with an embodiment of the present specification.

[0152] accomplish Figure 1 The computer program of the method shown can be stored on one or more computer readable media. The computer readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0153] The computer readable storage medium may include a data signal propagated in a baseband or as part of a carrier wave, wherein a readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The readable storage medium may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by an instruction execution system, an apparatus, or a device or used in combination with it. The program code contained on the readable storage medium may be transmitted with any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the above.

[0154] Program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the viewer computing device, partially on the viewer device, as a stand-alone software package, partially on the viewer computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the viewer computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0155] In summary, the present invention can be implemented in hardware, or in a software module running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that general data processing devices such as microprocessors or digital signal processors (DSPs) 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., a computer program and a 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.

[0156] The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the present invention is not inherently related to any specific computer, virtual device or electronic device, and various general devices can also implement the present invention. The above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0157] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0158] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A power fluctuation smoothing control method for a ship composite energy storage system, characterized in that: include: Obtain ship propulsion power; Determining the load condition of the ship based on the propulsion power of the ship; The multi-port bidirectional DC / DC converter of the ship composite energy storage system is used to control power fluctuation smoothing according to the ship load condition.

2. The power fluctuation smoothing control method of a ship composite energy storage system according to claim 1, characterized in that: The multi-port bidirectional DC / DC converter of the ship composite energy storage system performs power fluctuation smoothing control according to the ship load condition, including: P HESS (t)=P0(t)-P0(t) Among them, P HESS (t) is the real-time energy of the ship's composite energy storage system, P0(t) is the ship's propulsion power, and P′0(t) is the stable power after smoothing control of the ship's composite energy storage system.

3. The power fluctuation smoothing control method of a ship composite energy storage system according to claim 2, characterized in that: The multi-port bidirectional DC / DC converter of the ship composite energy storage system performs power fluctuation smoothing control according to the ship load condition, including: The ship composite energy storage system includes batteries and supercapacitors; When it is determined that the ship load is light based on the ship propulsion power, the battery and / or the supercapacitor are charged to absorb the ship propulsion power to achieve power fluctuation smoothing control; When it is determined that the ship load is overloaded based on the ship propulsion power, the battery and / or the supercapacitor is discharged to compensate for the ship propulsion power, so as to achieve power fluctuation smoothing control.

4. The power fluctuation smoothing control method of a ship composite energy storage system according to claim 3 is characterized in that: Also includes: Performing charging and discharging detection on the battery and / or the supercapacitor by means of a state of charge detector to determine the state of charge; The charging and discharging of the battery and / or the super capacitor are controlled to end based on the state of charge.

5. The power fluctuation smoothing control method of a ship composite energy storage system according to claim 4, characterized in that: The charging and discharging detection of the battery and / or the supercapacitor by a state of charge detector to determine the state of charge includes: Among them, SOC is the state of charge, E ini is the initial capacity of the ship composite energy storage system before charging and discharging, η ch is the charging efficiency of the ship composite energy storage system, η dis is the discharge efficiency of the ship composite energy storage system, P ch is the charging power of the ship composite energy storage system, P dis is the discharge power of the ship composite energy storage system, t is the charging and discharging time, E r is the rated capacity of the ship's composite energy storage system.

6. The power fluctuation smoothing control method of a ship composite energy storage system according to claim 5, characterized in that: The charging and discharging model of the battery and the charging and discharging model of the supercapacitor include: Among them, SOC b (t) is the state of charge of the battery at the current sampling point, SOC c (t) is the state of charge of the supercapacitor at the current sampling point, SOC b (t-1) is the state of charge of the battery at the previous sampling point, SOC c (t-1) is the charge state of the supercapacitor at the previous sampling point, P b (t)<0 is the charging state of the battery, P b (t)≥0 is the discharge state of the battery, P c (t)<0 is the charging state of the supercapacitor, P c (t)≥0 is the discharge state of the supercapacitor.

7. The power fluctuation smoothing control method of a ship composite energy storage system according to claim 6, characterized in that: Also includes: The state quantity of the battery is recorded based on the charging and discharging state of the battery, specifically: A charging time of the battery is determined based on the charging state of the battery, and a discharging time of the battery is determined based on the discharging state of the battery.

8. A power fluctuation smoothing control device for a ship composite energy storage system, characterized in that: include: An acquisition module, used for acquiring ship propulsion power; A judging module, used for judging the load condition of the ship based on the propulsion power of the ship; The control module is used to perform power fluctuation smoothing control according to the ship load condition through a multi-port bidirectional DC / DC converter of the ship composite energy storage system.

9. An electronic device, wherein: The electronic device includes: processor; and, A memory storing computer executable instructions which, when executed, cause the processor to perform a method according to any one of claims 1-7.

10. A computer-readable storage medium, wherein: The computer-readable storage medium stores one or more programs, and when the one or more programs are executed by a processor, the method of any one of claims 1 to 7 is implemented.

Images