Ship life power supply method and device based on multi-source power supply energy storage system

Abstract

The application provides a ship life power supply method and device based on a multi-source power supply energy storage system, and belongs to the field of ship power supply. The method provided by the application comprises the following steps: detecting the output end power supply current of an energy storage unit and the residual electric energy of the energy storage unit; predicting the electric energy demand based on the ship life power supply change trend; predicting the residual electric energy supply duration based on the power supply current, the residual electric energy and the electric energy demand; and adjusting the connectivity and charging current of a solar energy conversion unit, a kinetic energy recovery unit and an inverter management unit based on the actual supply duration and the real-time ship life power supply change trend, wherein the use priority of the solar energy conversion unit is higher than that of the kinetic energy recovery unit. The ship life power supply method and device based on the multi-source power supply energy storage system can economically, safely, conveniently and stably meet the ship life power supply demand.

Description

Technical Field

[0001] This application relates to the field of ship power supply technology, and in particular to a method and device for supplying electricity for ship living quarters based on a multi-source power supply and energy storage system. Background Technology

[0002] With the development of inland waterway shipping, the demand for electricity for domestic use on ships is increasing daily. However, currently, the electricity supply for domestic use on inland waterway vessels is primarily provided by shaft generators attached to the main engine during navigation, with a small number using photovoltaic panels supplemented by batteries. After the vessels dock, domestic power is supplied via shore power at some wharves with shore power capabilities. This power supply method has many problems, such as difficulty in obtaining electricity, high electricity costs, significant safety hazards, and unstable power quality. Therefore, there is an urgent need to propose a new solution for power supply to domestic use on ships. Summary of the Invention

[0003] In view of this, this application provides a method and device for supplying electricity for shipboard living quarters based on a multi-source power supply and energy storage system, which can economically, safely, conveniently and stably meet the electricity needs of shipboard living quarters.

[0004] Specifically, this application is implemented through the following technical solution:

[0005] The first aspect of this application provides a method for supplying electricity for shipboard living quarters based on a multi-source power supply and energy storage system.

[0006] The multi-source power supply and energy storage system includes a solar energy conversion unit, an inverter management unit, an energy storage unit, and a kinetic energy recovery unit. The inverter management unit is connected to both the solar energy conversion unit and the kinetic energy recovery unit. The kinetic energy recovery unit is connected to the shaft-driven generator of the marine diesel engine. The inverter management unit is connected to the input terminal of the energy storage unit. The method includes:

[0007] The output current of the energy storage unit and the remaining electrical energy of the energy storage unit are detected.

[0008] Predicting electricity demand based on trends in shipboard domestic electricity consumption;

[0009] The remaining power supply duration is predicted based on the supply current, remaining power, and power demand; wherein, after predicting the remaining power supply duration based on the supply current, remaining power, and power demand, the process includes: correcting the ship's domestic electricity consumption trend within the power supply duration range based on real-time current consumption to obtain the real-time ship's domestic electricity consumption trend; and correcting the power supply duration based on the real-time ship's domestic electricity consumption trend to obtain the actual power supply duration.

[0010] Based on the actual power supply duration and the real-time trend of shipboard electricity consumption, the connectivity and charging current of the solar energy conversion unit, the kinetic energy recovery unit, and the inverter management unit are adjusted, wherein the solar energy conversion unit has a higher priority than the kinetic energy recovery unit.

[0011] The second aspect of this application provides a power supply device for shipboard living quarters based on a multi-source power supply and energy storage system.

[0012] The multi-source power supply and energy storage system includes a solar energy conversion unit, an inverter management unit, an energy storage unit, and a kinetic energy recovery unit. The inverter management unit is connected to both the solar energy conversion unit and the kinetic energy recovery unit. The kinetic energy recovery unit is connected to the shaft-driven generator of the marine diesel engine. The inverter management unit is connected to the input terminal of the energy storage unit. The device includes a detection module, a prediction module, and a processing module.

[0013] The detection module is used to detect the output power supply current of the energy storage unit and the remaining electrical energy of the energy storage unit.

[0014] The prediction module is used to predict the electricity demand based on the changing trend of electricity consumption for daily life on board ships.

[0015] The prediction module is further configured to predict the duration of remaining power supply based on the supply current, remaining power, and power demand; wherein, after predicting the duration of remaining power supply based on the supply current, remaining power, and power demand, the process includes: correcting the trend of shipboard electricity consumption within the duration of power supply based on real-time current consumption to obtain the real-time trend of shipboard electricity consumption; and correcting the duration of power supply based on the real-time trend of shipboard electricity consumption to obtain the actual duration of power supply.

[0016] The processing module is used to adjust the connectivity and charging current of the solar energy conversion unit, the kinetic energy recovery unit and the inverter management unit based on the actual power supply duration and the real-time trend of shipboard electricity consumption. The solar energy conversion unit has a higher priority than the kinetic energy recovery unit.

[0017] The method and apparatus for supplying electricity for shipboard living quarters based on a multi-source power supply and energy storage system provided in this application integrate multiple energy sources such as solar energy conversion units and kinetic energy recovery units, achieving multi-source supply of electricity for shipboard living quarters. This improves energy utilization efficiency, reduces dependence on a single energy source, and intelligently predicts energy demand and the duration of remaining energy supply based on the output current of the energy storage units, remaining energy, and trends in shipboard living quarters electricity consumption. It also adjusts the connectivity and charging current of each unit accordingly, achieving intelligent energy management and improving the stability and reliability of the power supply. Furthermore, it can adjust the power supply strategy in a timely manner according to the changing trends in shipboard living quarters electricity consumption, effectively meeting the needs of shipboard living quarters electricity, improving power quality, ensuring the normal operation of the ship, and further reducing excessive use and wear of equipment by rationally adjusting the working status of each unit, thus extending equipment lifespan and reducing maintenance costs. The method provided in this application detects the remaining energy and supply current of the energy storage units and monitors and adjusts the working status of each unit in real time, improving system safety and reducing potential electrical safety hazards. Moreover, prioritizing the use of solar energy conversion units to provide electricity reduces dependence on traditional diesel engines, achieving the goal of energy conservation and emission reduction. By primarily using solar energy and secondarily using kinetic energy recovery, and by pre-storing electrical energy and adjusting charging strategies according to power demand, a more stable supply of electricity for shipboard living can be provided. Attached Figure Description

[0018] Figure 1 A flowchart of an embodiment of the shipboard domestic power supply method based on a multi-source power supply and energy storage system provided in this application;

[0019] Figure 2 This is a schematic diagram of the first embodiment of the shipboard domestic power supply device based on a multi-source power supply and energy storage system provided in this application. Detailed Implementation

[0020] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0021] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used herein are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0022] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0023] The following specific embodiments are given to illustrate the technical solution of this application in detail.

[0024] To better illustrate this, let's first introduce the multi-source power supply and energy storage system used in this method:

[0025] The multi-source power supply and energy storage system includes a solar energy conversion unit (photovoltaic panel), an inverter management unit (inverter), an energy storage unit (lithium iron phosphate battery pack), and a kinetic energy recovery unit. The output of the solar energy conversion unit is connected to the input of the inverter management unit, the output of the kinetic energy recovery unit is connected to the input of the inverter management unit, the output of the inverter management unit is connected to the input of the energy storage unit, and the kinetic energy recovery unit is connected to the shaft-driven generator of the marine diesel engine via a transmission mechanism.

[0026] The system comprises several components: a solar energy conversion unit that converts solar energy into direct current (DC), which is then stored in the energy storage unit via an inverter management unit; a kinetic energy recovery unit that recovers waste kinetic energy generated by the ship's diesel engines, converting it into electrical energy via a shaft-driven generator, which is also stored in the energy storage unit via the inverter management unit; and an inverter management unit that dynamically adjusts the input current based on the remaining capacity of the energy storage unit to achieve intelligent allocation of energy from multiple sources. The energy storage unit uses lithium iron phosphate battery packs to store solar energy and recovered kinetic energy, providing a stable power supply for the ship's domestic use. Furthermore, the multi-source power supply and energy storage system includes a power supply status detection unit connected to the input and output terminals of the energy storage unit. This unit detects the current flowing through the energy storage unit during charging and providing domestic power, ensuring system safety.

[0027] Figure 1 This is a flowchart of an embodiment of the shipboard domestic power supply method based on a multi-source power supply and energy storage system provided in this application. Please refer to... Figure 1 The method provided in this embodiment may include:

[0028] S101. Detect the output current of the energy storage unit and the remaining electrical energy of the energy storage unit.

[0029] It should be noted that the output supply current of the energy storage unit refers to the current supplied by the energy storage unit to external loads (such as the ship's domestic electrical equipment). Specifically, the output supply current of the energy storage unit can be detected by the power supply status detection unit. The power supply status detection unit monitors the magnitude of the current output from the energy storage unit (real-time data) through a built-in current sensor to ensure that the current remains within a safe range, avoiding system failure or unstable operation due to excessively high or low current.

[0030] Remaining electrical energy refers to the amount of electricity stored in an energy storage unit, typically expressed as a percentage or capacity value (e.g., Ah or Wh). The remaining electrical energy of an energy storage unit can be detected using relevant power monitoring equipment; details can be found in the descriptions of related technologies, and this embodiment will not elaborate on the specific methods for detecting remaining electrical energy. Alternatively, the remaining electrical energy of the energy storage unit can also be detected using a battery management system (BMS). The BMS calculates and displays the remaining battery capacity by monitoring parameters such as battery voltage, current, and temperature in real time, based on different algorithms and measurement methods.

[0031] It should also be noted that the control flow of the power supply status detection unit includes:

[0032] (1) Detect the temperature of the energy storage unit and, in combination with the remaining electrical energy and the power supply, determine the current circuit state.

[0033] It should be noted that the energy storage unit uses lithium iron phosphate battery packs, which may experience performance degradation, shortened lifespan, or even dangerous situations under high or low temperatures. Specifically, the temperature of the energy storage unit can be monitored in real time using a temperature sensor. Power supply refers to the power provided by the energy storage unit to the load. Power supply is related to current and voltage and reflects the system's power demand and power output status. Furthermore, when the remaining charge of the energy storage unit is too low, the system may need to reduce the power supply or activate other energy units to supplement the electrical energy.

[0034] It should also be noted that the current circuit status may include normal battery temperature, low battery temperature, and high battery temperature, or it may include whether it is operating normally, whether the power needs to be adjusted, or whether additional power needs to be supplied.

[0035] (2) Adjust the charging and discharging current of the energy storage unit based on the circuit state; wherein the magnitude of the charging current and the detected temperature of the energy storage unit show a synchronous upward trend within a specified range.

[0036] It's important to note that the system first determines whether to adjust the charging or discharging of the energy storage unit based on the detected battery temperature to prevent overheating or overcooling. The temperature rise of the energy storage unit is primarily related to the charging current (which determines the battery charging rate); within a specified range, a higher charging current results in a higher energy storage unit temperature. Specifically, temperature information and remaining energy can be considered simultaneously. For example, if the battery temperature is too high and the remaining energy is high, the system may pause or reduce the charging current to prevent further temperature increases. Furthermore, when adjusting based on power supply, if the power supply is too high and a temperature rise or insufficient remaining energy is detected, the system may take measures such as reducing power and current limiting (including limiting charging and discharging currents, where the discharging current determines the battery's ability to supply power) to protect the battery and other circuits. In this way, adjusting the charging and discharging current of the energy storage unit based on the circuit state can avoid damage to the battery structure, extend battery life, and ensure circuit safety.

[0037] S102. Predict electricity demand based on the changing trend of electricity consumption for daily life on ships.

[0038] It should be noted that the method for obtaining the trend of changes in shipboard electricity consumption includes:

[0039] (1) Obtain the parameters affecting the electricity consumption of ship living quarters, including at least the number of people and the hardware conditions of the ship's living quarters.

[0040] It should be noted that domestic electricity consumption is much smaller in scale than power consumption and is affected by many factors, such as the number of people and the physical conditions of the ship's living area. The number of people living or working on board directly affects electricity demand; more people usually mean more electricity demand, such as for lighting, air conditioning, and kitchen equipment. The physical conditions of the ship's living area include the number and type of facilities and equipment (such as air conditioning, lighting systems, and kitchen equipment), and these factors affect the pattern and scale of electricity consumption.

[0041] (2) Based on the impact parameters of residential electricity consumption and the trend of similar residential electricity consumption changes in ship routes.

[0042] It should be noted that, based on the influencing parameters, the trends in residential electricity consumption under similar conditions (similar types and sizes) are selected as a reference. These trends can be obtained through historical data, electricity consumption records of similar ships, or industry standards. Considering the area and route conditions of ship navigation, different routes may have different residential electricity demands (for example, the air conditioning demand differs between tropical and temperate routes).

[0043] (3) Based on the difference between the ship's sailing time and the electricity consumption time in the same type of domestic electricity consumption trend, the same type of domestic electricity consumption trend is corrected to generate the ship's domestic electricity consumption trend.

[0044] Specifically, by adjusting the reference trends of similar residential electricity consumption, the system adapts to the actual sailing time and electricity usage patterns of the ship. For example, some routes may have more stops or different weather conditions, which will affect electricity demand. Furthermore, the corrected data generates residential electricity consumption trends that reflect the actual conditions of the ship, which are then used for subsequent electricity demand forecasting and management.

[0045] Furthermore, it should be noted that after adjusting the connectivity and charging current of the solar energy conversion unit, the kinetic energy recovery unit, and the inverter management unit based on the power supply duration and the trend of electricity consumption for daily life on the ship, the following is also included:

[0046] (1) Collect the output current of the energy storage unit and generate a real-time electricity consumption change curve. The time span of the real-time electricity consumption change curve is smaller than the trend of electricity consumption change on the ship.

[0047] It should be noted that the output current of the energy storage unit is monitored in real time. By analyzing the real-time data, a real-time electricity consumption curve is plotted to generate a real-time domestic electricity consumption change curve. The time span of this curve should be shorter than the overall trend of domestic electricity consumption on the ship in order to capture short-term electricity fluctuations.

[0048] (2) Correct the trend of the ship's domestic electricity consumption based on the real-time domestic electricity consumption change curve, wherein the correction includes the trend of the ship's domestic electricity consumption change over the entire time span.

[0049] By correcting the trend of shipboard electricity consumption by real-time electricity consumption change curves, the predicted trend is made consistent with the actual electricity consumption. The correction includes adjustments to the trend over the entire time span, which makes the prediction more accurate.

[0050] Specifically, predicting electricity demand based on trends in shipboard domestic electricity consumption includes:

[0051] (1) Obtain real-time time information of ship navigation; the real-time time information includes at least seasonal information and time period information of the real-time time information in a day.

[0052] It should be noted that the current date can be obtained from the ship's navigation or navigation management system to calculate the season, such as spring, summer, autumn, or winter. Electricity demand varies in different seasons; for example, air conditioning requires more electricity in summer than in other seasons. Furthermore, the current time period (obtainable through the system clock) also needs to be determined, such as morning, forenoon, noon, afternoon, evening, or night. Electricity demand also varies at different times; for example, electricity consumption may be higher in the morning, noon, and evening due to concentrated power supply for cooking.

[0053] (2) Based on the seasonal information and the time period information, locate multiple target time period trends of the same season and time in the trend of electricity consumption for living on the ship.

[0054] Historical electricity consumption data of similar vessels during the same season and time period is collected to obtain trends for multiple target time periods within the same season and time. Specifically, multiple target time period trends that match the current season and time period are selected from the historical data. For example, electricity consumption data from past winter evenings or summer afternoons can be selected and analyzed to understand the electricity consumption patterns and trends in different time periods.

[0055] (3) Calculate the comprehensive trend based on the trends of the multiple target time periods.

[0056] It should be noted that combining electricity consumption trend data from multiple target time periods into a comprehensive trend can be achieved through weighted averaging, data synthesis, or other statistical methods. Weighted averaging calculates the average value based on the data weights of different time periods; for example, the weight of nighttime electricity consumption may be greater than that of morning electricity consumption. Data synthesis generates a representative trend by combining data from the target time period.

[0057] (4) Using the comprehensive trend as the real-time change curve of residential electricity consumption, predict the estimated change trend at the next moment.

[0058] After obtaining the overall trend, the electricity consumption patterns in the overall trend are analyzed, such as peak electricity consumption periods and off-peak electricity consumption periods. Based on the overall trend, a real-time electricity consumption change curve for daily life is generated (the real-time output current of the energy storage unit can be determined through the overall trend). This curve reflects the short-term fluctuations and patterns of electricity consumption. The time span should be shorter than the overall trend of electricity consumption change for daily life on the ship. Through this curve, time series analysis, regression models and other methods can be used to predict the estimated change trend at the next moment. The real-time electricity consumption change curve for daily life is updated regularly according to the actual electricity consumption situation.

[0059] (5) Predict the demand for electricity based on the estimated trend of change.

[0060] It should be noted that the calculation of future electricity demand is based on the estimated trend. For example, predicting the electricity demand for the next hour or day. This allows for accurate forecasting of the ship's electricity needs, optimization of energy use, and improvement of the ship's energy efficiency and reliability.

[0061] S103. Based on the supply current, remaining power and power demand, predict the power supply duration of the remaining power.

[0062] It should be noted that the electricity demand for a future period can be predicted based on the trend of residential electricity consumption. The rate of electricity consumption can be calculated based on the supply current and battery voltage, and the duration of power supply can be obtained based on the ratio of remaining electricity to the rate of electricity consumption. If the electricity demand changes significantly in the future, the duration of power supply needs to be dynamically adjusted. For example, if the demand increases significantly in the next hour, the duration of power supply will be reduced.

[0063] Specifically, predicting the duration of remaining power supply based on the supply current, remaining power, and power demand includes:

[0064] (1) Predict the energy demand in the future over multiple time periods.

[0065] The future time is divided into several time periods, specifically multiple consecutive time periods within a short time period, and the electricity demand in these multiple time periods is predicted based on the changing trends of electricity consumption for shipboard living.

[0066] (2) Based on the remaining electrical energy, determine the first power supply period in which the power demand in the future multiple time periods can meet the power supply demand.

[0067] It should be noted that the electricity demand in each time period is accumulated until the accumulated value reaches or exceeds the total amount of remaining electricity. The first power supply period refers to the last time period that the remaining electricity can support from the current moment, during which the electricity demand can still be met by the remaining electricity.

[0068] (3) Calculate the power supply duration based on the ratio of the sum of the power demand corresponding to the first power supply period to the power supply current.

[0069] It should be noted that, with the battery voltage remaining constant, the power supply duration can be calculated directly based on the ratio of the sum of the power demand to the supply current.

[0070] S104. Based on the actual power supply duration and the real-time trend of shipboard electricity consumption, adjust the connectivity and charging current of the solar energy conversion unit, the kinetic energy recovery unit and the inverter management unit, wherein the solar energy conversion unit has a higher priority than the kinetic energy recovery unit.

[0071] It should be noted that adjusting the connectivity and charging current of the solar energy conversion unit, the kinetic energy recovery unit, and the inverter management unit based on the power supply duration and the trend of electricity consumption for daily life on the ship includes:

[0072] (1) Based on the real-time power consumption current, the change trend of the ship's domestic electricity consumption within the power supply time range is corrected to obtain the real-time change trend of the ship's domestic electricity consumption.

[0073] It should be noted that, based on the actual current consumption, the previously predicted trend of electricity consumption for ship living is corrected to obtain a more accurate trend. This correction takes into account the possible fluctuations in electricity consumption and unexpected load changes that may occur during ship operation. Then, the corrected data is integrated to generate a real-time trend of electricity consumption for ship living.

[0074] (2) Based on the real-time trend of electricity consumption for living on the ship, the power supply duration is corrected to obtain the actual power supply duration.

[0075] Specifically, the power supply duration is recalculated using real-time trends in shipboard electricity consumption. Since actual electricity consumption may differ from forecasts, the power supply duration may increase or decrease. The new power supply duration is calculated using updated electricity demand and current remaining power to ensure that the power supply can reasonably meet the needs of daily life.

[0076] (3) Calculate the maximum charging efficiency of the solar energy conversion unit.

[0077] It should be noted that maximum charging efficiency refers to the maximum energy conversion rate that a solar power conversion unit can achieve under ideal conditions, which typically depends on light intensity, temperature, and equipment performance. The maximum power output of the solar power conversion unit can be calculated by obtaining current light conditions and predicting the output of the photovoltaic panel at different times.

[0078] (4) Calculate the product of the maximum charging efficiency and the power supply duration.

[0079] Specifically, the product of maximum charging efficiency and power supply duration is the electrical energy that solar energy can provide to the energy storage unit within the power supply duration.

[0080] (5) Connect the solar energy conversion unit based on the relationship between the product and the energy difference of the energy storage unit, and adjust the charging current of the solar energy conversion unit. The energy difference is the difference between the remaining energy and the safe energy.

[0081] Specifically, when the product is greater than the energy difference of the energy storage unit, only the solar energy conversion unit is connected; when the product is less than the energy difference of the energy storage unit, both the solar energy conversion unit and the kinetic energy recovery unit are connected, and the charging current of the solar energy conversion unit is increased. In the method provided in this application, when the remaining energy of the energy storage unit can meet the usage requirements, solar energy is preferentially used for energy storage and supply, and the kinetic energy recovery unit is not used to recover the waste kinetic energy generated by the diesel engine. When the remaining energy of the energy storage unit cannot meet the usage requirements or when a trend of not being able to meet the usage requirements is detected, the kinetic energy recovery unit is used to recover the waste kinetic energy generated by the diesel engine as supplementary energy for charging. Specifically, during the kinetic energy recovery process, due to different operating conditions, the voltage, current, and other fluctuations are also different. At this time, the frequency, voltage, and current signals under each operating condition are processed and set to a specified range through filtering to ensure the stability of the power signal and achieve the purpose of voltage and current stabilization.

[0082] It should be noted that, under the condition that the usage requirements can be met, the charging of the solar conversion unit is carried out slowly, and charging only begins after a preset initial charging threshold is reached. The initial charging threshold is also adjusted based on subsequent changes in electricity consumption trends. If the electricity demand is found to be high, the charging threshold is increased; if the electricity demand is found to be low, the charging threshold is decreased. This process is continuously and dynamically updated. By setting a charging threshold, the charging process is not carried out in real time, which can prevent the battery from overheating, causing danger, and ensure the battery's lifespan.

[0083] It should also be noted that after connecting the kinetic energy recovery unit, the process further includes: calculating the difference between the kinetic energy provided by the diesel engine and the kinetic energy required for ship navigation; when the difference is positive and greater than a preset influence factor, the kinetic energy recovery unit starts working. Preferably, the kinetic energy recovery unit operates at a non-constant power. The non-constant power is specifically determined as follows: determining the energy surplus based on the difference between the real-time trend of ship domestic electricity consumption and the power supply curve of the diesel engine; generating an initial working power based on the energy surplus; matching the working power at each time point with the energy surplus; furthermore, the working power can be matched with the safe surplus amount of the energy surplus minus a safety threshold; acquiring the ship's navigation route and real-time position; estimating the time point and event of sudden changes in domestic electricity consumption based on the navigation route and real-time position; predicting the direction of the sudden change and the amount of electricity consumed during the sudden change based on the semantic content of the event; adjusting the working power at the time point corresponding to the predicted direction of the sudden change, with the adjustment amount matching the amount of electricity consumed during the sudden change; wherein, the preset influence factor is the safe amount by which the kinetic energy recovery unit recovers kinetic energy without affecting ship navigation. This minimizes the loss of kinetic energy during navigation, ensuring its safety and preventing any impact on the journey.

[0084] It should be noted that using non-constant power for kinetic energy recovery, compared to traditional constant power or simple start-stop control, offers several advantages. First, by dynamically generating operating power based on the available energy supply, it ensures that the recovered kinetic energy matches the current actual power demand to the maximum extent, avoiding power shortages due to insufficient recovery or energy waste and unnecessary diesel consumption due to excessive recovery. Second, the introduction of a power consumption surge prediction mechanism based on the navigation route and real-time location allows for proactive adjustment of kinetic energy recovery power. For example, the system can predict that the ship is about to dock, and the domestic electricity load will decrease significantly, thus reducing the kinetic energy recovery power in advance to prevent overcharging of the energy storage unit; or it can predict that the ship is about to pass through a high-temperature area, and the air conditioning load will increase sharply, thus reserving kinetic energy recovery power in advance. This intelligent control strategy, linked to navigation tasks and geographic information, greatly enhances the ship's autonomous power supply capability and energy efficiency throughout the voyage.

[0085] The method provided in this application also includes a fault handling method. Specifically, the multi-source power supply energy storage system further includes a charging self-test module, a hardware overload self-test module, and a hardware fault self-test module.

[0086] The charging self-test module detects the charging status of the energy storage unit in real time, the hardware overload self-test module monitors the current and voltage parameters on the power consumption side in real time, and the hardware fault self-test module monitors the working status of each hardware device in the system in real time.

[0087] The detected signals are analyzed and compared with preset standards to identify underpower, overload, and hardware failure.

[0088] When a power shortage fault is detected, cloud alarms are activated, smart terminal security policy interventions are implemented, and a protective power supply control mode is activated.

[0089] When an overload fault is detected, cloud alarms, smart terminal security policy intervention, and hardware output overcurrent protection devices are activated.

[0090] When a hardware failure is detected, cloud alarms, smart terminal security policy interventions, and hardware self-protection devices are activated.

[0091] Specifically, the charging self-test module provides real-time monitoring. When a charging fault is detected on the charging side, an alarm is triggered in the cloud and the user is notified to promptly check the equipment status or contact maintenance. The intelligent terminal security strategy intervenes, taking corresponding actions based on the different parts of the charging unit that are faulty. When the energy recovery unit fails, current limiting power supply control and full-load power supply mode of the photovoltaic main power supply are implemented to ensure the normal power supply of the system in a short period of time. When the photovoltaic main power supply unit fails, a protective power supply control mode is implemented to ensure the safety of the system's energy storage battery and avoid power outages.

[0092] Specifically, the hardware overload self-test module provides real-time monitoring. When an overload is detected on the power consumption side, an alarm is triggered in the cloud and the user is notified to promptly disconnect the electrical appliances to reduce the load on the power consumption side of the system. The intelligent terminal safety strategy intervenes, controlling the current supply according to the degree of overload. In severe cases, a short-term power outage self-protection mode is adopted to ensure the safety of the entire system. The hardware output terminal is equipped with an overcurrent protection device, which can automatically disconnect when the instantaneous current is too large to protect the safety of the entire system.

[0093] Specifically, the hardware fault self-diagnosis module provides real-time monitoring. When a hardware fault is detected, an alarm is triggered in the cloud and the user is notified to promptly disconnect the equipment or contact maintenance. The intelligent terminal security policy intervention implements corresponding strategies such as current limiting power supply control, protective power supply control, and full-load power supply control based on the severity of the fault, protecting system safety while also considering the user's power consumption experience. The hardware is equipped with a self-protection device. In extreme cases, the user can choose to unlock the self-protection device to perform a hard disconnection of the system to ensure their own and the ship's safety.

[0094] This embodiment provides a method for supplying electricity to shipboard living quarters based on a multi-source power supply and energy storage system. By integrating multiple energy sources such as solar energy conversion units and kinetic energy recovery units, it achieves multi-source power supply for shipboard living quarters, improving energy utilization efficiency, reducing dependence on a single energy source, and intelligently predicting energy demand and the duration of remaining energy supply based on the output current of the energy storage units, remaining energy, and the changing trends of shipboard living quarters electricity consumption. It also adjusts the connectivity and charging current of each unit accordingly, achieving intelligent energy management and improving the stability and reliability of power supply. Furthermore, it can adjust the power supply strategy in a timely manner according to the changing trends of shipboard living quarters electricity consumption, effectively meeting the needs of shipboard living quarters electricity consumption, improving power quality, ensuring the normal operation of the ship, and further reducing excessive use and wear of equipment by rationally adjusting the working status of each unit, extending equipment lifespan, and reducing maintenance costs. The method provided in this application detects the remaining energy and supply current of the energy storage units, and monitors and adjusts the working status of each unit in real time, also improving system safety and reducing potential electrical safety hazards. Moreover, it prioritizes the use of solar energy conversion units to provide electricity, reducing dependence on traditional diesel engines and achieving the goal of energy conservation and emission reduction. By primarily utilizing solar energy and supplemented by kinetic energy recovery, the system pre-stores electrical energy and adjusts charging strategies based on power demand, enabling a more stable supply of electricity for shipboard living quarters. It's also worth noting that, based on trends in shipboard electricity consumption and combined with real-time power data, the system can automatically correct energy supply forecasts and demand estimates, making power dispatch more precise and avoiding mismatches between electricity demand and supply, thereby effectively extending the duration of power supply. By calculating the difference between remaining and safe energy levels, the system can rationally control the charging and discharging of energy storage units, preventing low energy levels from affecting the ship's normal living electricity needs. Simultaneously, while ensuring safe power supply, the system adjusts the operation of solar energy and kinetic energy recovery units to ensure a stable energy supply.

[0095] Corresponding to the aforementioned embodiment of a method for supplying electricity to shipboard living quarters based on a multi-source power supply and energy storage system, this application also provides an embodiment of a device for supplying electricity to shipboard living quarters based on a multi-source power supply and energy storage system.

[0096] Figure 2 This is a schematic diagram of the first embodiment of the shipboard domestic power supply device based on a multi-source power supply and energy storage system provided in this application. Please refer to... Figure 2 The multi-source power supply and energy storage system includes a solar energy conversion unit, an inverter management unit, an energy storage unit, and a kinetic energy recovery unit. The inverter management unit is connected to both the solar energy conversion unit and the kinetic energy recovery unit. The kinetic energy recovery unit is connected to the shaft-driven generator of the marine diesel engine. The inverter management unit is connected to the input terminal of the energy storage unit. The device includes a detection module, a prediction module, and a processing module.

[0097] The detection module is used to detect the output power supply current of the energy storage unit and the remaining electrical energy of the energy storage unit.

[0098] The prediction module is used to predict the electricity demand based on the changing trend of electricity consumption for daily life on board ships.

[0099] The prediction module is further configured to predict the duration of remaining power supply based on the supply current, remaining power, and power demand; wherein, after predicting the duration of remaining power supply based on the supply current, remaining power, and power demand, the process includes: correcting the trend of shipboard electricity consumption within the duration of power supply based on real-time current consumption to obtain the real-time trend of shipboard electricity consumption; and correcting the duration of power supply based on the real-time trend of shipboard electricity consumption to obtain the actual duration of power supply.

[0100] The processing module is used to adjust the connectivity and charging current of the solar energy conversion unit, the kinetic energy recovery unit and the inverter management unit based on the actual power supply duration and the real-time trend of shipboard electricity consumption. The solar energy conversion unit has a higher priority than the kinetic energy recovery unit.

[0101] The apparatus of this embodiment can be used to perform... Figure 1 The steps of the method embodiment shown are similar in principle and process, and will not be repeated here.

[0102] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this application according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0103] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for supplying electricity for shipboard living quarters based on a multi-source power supply and energy storage system, characterized in that, The multi-source power supply and energy storage system includes a solar energy conversion unit, an inverter management unit, an energy storage unit, and a kinetic energy recovery unit. The inverter management unit is connected to both the solar energy conversion unit and the kinetic energy recovery unit. The kinetic energy recovery unit is connected to the shaft-driven generator of the marine diesel engine. The inverter management unit is connected to the input terminal of the energy storage unit. The method includes: The output current of the energy storage unit and the remaining electrical energy of the energy storage unit are detected. Predicting electricity demand based on trends in shipboard domestic electricity consumption; The remaining power supply duration is predicted based on the supply current, remaining power, and power demand; wherein, after predicting the remaining power supply duration based on the supply current, remaining power, and power demand, the process includes: correcting the ship's domestic electricity consumption trend within the power supply duration range based on real-time current consumption to obtain the real-time ship's domestic electricity consumption trend; and correcting the power supply duration based on the real-time ship's domestic electricity consumption trend to obtain the actual power supply duration. Based on the actual power supply duration and the real-time trend of shipboard electricity consumption, the connectivity and charging current of the solar energy conversion unit, the kinetic energy recovery unit, and the inverter management unit are adjusted, wherein the solar energy conversion unit has a higher priority than the kinetic energy recovery unit.

2. The method according to claim 1, characterized in that, The method for obtaining the trend of electricity consumption for living quarters on the ship includes: Obtain parameters affecting shipboard living electricity consumption, including at least the number of people and the hardware conditions of the shipboard living area; Based on the impact parameters of residential electricity consumption and the matching trend of similar residential electricity consumption based on ship routes; Based on the difference between the ship's sailing time and the electricity consumption time in the aforementioned similar domestic electricity consumption trends, the aforementioned domestic electricity consumption trends are corrected to generate the ship's domestic electricity consumption trends; After adjusting the connectivity and charging current of the solar energy conversion unit, kinetic energy recovery unit, and inverter management unit based on the power supply duration and the trend of electricity consumption for daily life on the ship, the method further includes: The output current of the energy storage unit is collected to generate a real-time domestic electricity consumption change curve. The time span of the real-time domestic electricity consumption change curve is shorter than the trend of domestic electricity consumption change on the ship. The ship's domestic electricity consumption trend is corrected based on the real-time domestic electricity consumption change curve, and the correction includes the trend of the ship's domestic electricity consumption change over the entire time span.

3. The method according to claim 1, characterized in that, The prediction of electricity demand based on the changing trend of electricity consumption for living on board ships includes: Obtain real-time time information of ship navigation; the real-time time information includes at least seasonal information and time period information of the real-time time information within a day; Based on the seasonal information and the time period information, multiple target time period trends of the same season and time are located in the trend of changes in shipboard electricity consumption. Calculate the overall trend based on the trends of the multiple target time periods; Using the aforementioned comprehensive trend as a real-time residential electricity consumption change curve, the estimated change trend at the next moment is predicted; The electricity demand is predicted based on the estimated trend of change.

4. The method according to claim 1, characterized in that, The multi-source power supply and energy storage system also includes a power supply status detection unit, the control process of which includes: The temperature of the energy storage unit is detected, and the current circuit status is determined by combining the remaining electrical energy and the power supply. The charging and discharging current of the energy storage unit is adjusted based on the circuit state; wherein the magnitude of the charging current and the detected temperature of the energy storage unit show a synchronous upward trend within a specified range.

5. The method according to claim 1, characterized in that, The method of predicting the power supply duration of the remaining power based on the supply current, remaining power, and power demand includes: Predict the electricity demand over multiple future time periods; Based on the remaining electrical energy, determine the first power supply period among the electrical energy demand in the future multiple time periods that can meet the power supply demand; The power supply duration is calculated based on the ratio of the sum of the power demand corresponding to the first power supply period to the power supply current.

6. The method according to claim 1, characterized in that, The adjustment of the connectivity and charging current of the solar energy conversion unit, the kinetic energy recovery unit, and the inverter management unit based on the power supply duration and the trend of changes in shipboard domestic electricity consumption includes: Calculate the maximum charging efficiency of the solar energy conversion unit; Calculate the product of the maximum charging efficiency and the power supply duration; Based on the relationship between the product and the energy difference of the energy storage unit, the solar energy conversion unit is connected, and the charging current of the solar energy conversion unit is adjusted. The energy difference is the difference between the remaining energy and the safe energy.

7. The method according to claim 6, characterized in that, The connection to the solar energy conversion unit based on the relationship between the product and the energy difference of the energy storage unit, and the adjustment of the charging current of the solar energy conversion unit, includes: When the product is greater than the energy difference of the energy storage unit, only the solar energy conversion unit is connected; When the product is less than the energy difference of the energy storage unit, the solar energy conversion unit and the kinetic energy recovery unit are connected, and the charging current of the solar energy conversion unit is increased.

8. The method according to claim 7, characterized in that, After connecting the kinetic energy recovery unit, it also includes: Calculate the difference between the kinetic energy provided by the diesel engine and the kinetic energy required for the ship's navigation; When the difference is positive and greater than a preset influence factor, the kinetic energy recovery unit starts to work; wherein, the preset influence factor is the safe amount of kinetic energy recovery by the kinetic energy recovery unit without affecting the ship's navigation.

9. The method according to claim 1, characterized in that, The multi-source power supply and energy storage system also includes a charging self-test module, a hardware overload self-test module, and a hardware fault self-test module, among which, The charging self-test module detects the charging status of the energy storage unit in real time, the hardware overload self-test module monitors the current and voltage parameters on the power consumption side in real time, and the hardware fault self-test module monitors the working status of each hardware device in the system in real time. The detected signals are analyzed and compared with preset standards to identify underpower, overload, and hardware failure. When a power shortage fault is detected, cloud alarms are activated, smart terminal security policy interventions are implemented, and a protective power supply control mode is activated. When an overload fault is detected, cloud alarms, smart terminal security policy intervention, and hardware output overcurrent protection devices are activated. When a hardware failure is detected, cloud alarms, smart terminal security policy interventions, and hardware self-protection devices are activated.

10. A power supply device for shipboard living quarters based on a multi-source power supply and energy storage system, characterized in that, The multi-source power supply and energy storage system includes a solar energy conversion unit, an inverter management unit, an energy storage unit, and a kinetic energy recovery unit. The inverter management unit is connected to both the solar energy conversion unit and the kinetic energy recovery unit. The kinetic energy recovery unit is connected to the shaft-driven generator of the marine diesel engine. The inverter management unit is connected to the input terminal of the energy storage unit. The device includes a detection module, a prediction module, and a processing module. The detection module is used to detect the output power supply current of the energy storage unit and the remaining electrical energy of the energy storage unit. The prediction module is used to predict the electricity demand based on the changing trend of electricity consumption for daily life on board ships. The prediction module is further configured to predict the duration of remaining power supply based on the supply current, remaining power, and power demand; wherein, after predicting the duration of remaining power supply based on the supply current, remaining power, and power demand, the process includes: correcting the trend of shipboard electricity consumption within the duration of power supply based on real-time current consumption to obtain the real-time trend of shipboard electricity consumption; and correcting the duration of power supply based on the real-time trend of shipboard electricity consumption to obtain the actual duration of power supply. The processing module is used to adjust the connectivity and charging current of the solar energy conversion unit, the kinetic energy recovery unit and the inverter management unit based on the actual power supply duration and the real-time trend of shipboard electricity consumption. The solar energy conversion unit has a higher priority than the kinetic energy recovery unit.

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