Energy management strategy determination method and device, equipment and medium

Abstract

The invention discloses an energy management strategy determination method and device, equipment and a medium, and is applied to the field of energy management. The method comprises the following steps: determining attenuation rates corresponding to the multi-energy coupling power system and used for representing life states based on a life determination model of the multi-energy coupling power system, and determining corresponding replacement costs according to the attenuation rates; on the basis of a multi-energy coupling power system energy consumption determination model, determining each consumption amount which corresponds to the multi-energy coupling power system and is used for representing the consumption state, and determining each corresponding operation cost according to each consumption amount; determining the life cycle cost corresponding to each operation cost and each replacement cost based on the life cycle model of the multi-energy coupling power system; and determining an energy management strategy corresponding to the multi-energy coupling power system according to the life cycle cost. Therefore, the evaluation problem of the complex energy management strategy multi-objective optimization result is converted into a single objective through an economic cost method, the persuasive ability is high, and the consideration is comprehensive.

Description

Technical Field

[0001] The present application relates to the field of energy management, and particularly to a method, device, equipment and medium for determining an energy management strategy. Background Art

[0002] The multi - energy coupling power system carried by current hydrogen - energy rail transit vehicles generally includes a hydrogen fuel cell and an energy storage system, and the energy storage system includes a power battery system and / or a supercapacitor system. That is to say, the topological structure of the current multi - energy coupling power system based on hydrogen energy is generally two - hybrid or three - hybrid. Two - hybrid means that the multi - energy coupling power system is composed of two power sources, namely a hydrogen fuel cell system and a power battery system or a supercapacitor system; three - hybrid means that the multi - energy coupling power system is composed of three power sources, namely a hydrogen fuel cell system, a power battery system and a supercapacitor system.

[0003] In recent years, for the above - mentioned multi - energy coupling power system, it is necessary to develop an energy management control strategy suitable for the multi - energy coupling power system to reduce the energy consumption of the entire power system, improve the economy and durability of the multi - energy coupling power system, and extend the service life of the system.

[0004] In the process of developing an energy management strategy, in the current method for determining the advantages and disadvantages of the developed energy management strategy, generally only the hydrogen consumption, or the hydrogen consumption and the service life of the fuel cell system, or the hydrogen consumption, the service life of the fuel cell system and the service life of the power battery system are considered. For both the case of non - single or single targets, there is a corresponding single method. Therefore, in practical applications, engineers need to make a choice based on their own needs for the results of this multi - objective optimization, whether to choose an energy management strategy with good economy or a strategy with good durability, which is a difficult choice.

[0005] In view of the above technology, seeking a method for determining an energy management strategy is an urgent problem for those skilled in the art. Summary of the Invention

[0006] The purpose of the present application is to provide a method, device, equipment and medium for determining an energy management strategy, which can solve the problem in the prior art that it is impossible to select an energy management strategy with good economy or a strategy with good durability.

[0007] To solve the above - mentioned technical problems, the present application provides a method for determining an energy management strategy, which is applied to a multi - energy coupling power system including a fuel cell, a power battery and a supercapacitor, and includes:

[0008] Determine each decay rate corresponding to the multi - energy coupling power system for characterizing the life state based on the multi - energy coupling power system life determination model, and determine the corresponding replacement costs according to each decay rate;

[0009] Determine the consumption quantities corresponding to the multi - energy coupled power system for characterizing the consumption state based on the multi - energy coupled power system energy consumption determination model, and determine the corresponding operating costs according to the consumption quantities.

[0010] Determine the life - cycle costs corresponding to the operating costs and replacement costs based on the multi - energy coupled power system life - cycle model.

[0011] Determine the energy management strategy corresponding to the multi - energy coupled power system according to the life - cycle costs.

[0012] Preferably, determine the attenuation rates corresponding to the multi - energy coupled power system for characterizing the life state based on the multi - energy coupled power system life determination model, including:

[0013] Determine the fuel cell attenuation amount based on the corresponding operating condition correction parameters in the fuel cell, the voltage attenuation values corresponding to different operating conditions, and the operating time, and determine the fuel cell attenuation rate for characterizing the fuel cell life state according to the fuel cell attenuation amount and the preset voltage attenuation value.

[0014] Determine the battery charge difference based on the current battery charge quantity and the rated battery charge quantity in the power battery, and determine the power battery attenuation rate for characterizing the power battery life state corresponding to the interval where the battery charge difference belongs by using the preset interval division rule.

[0015] Determine the capacitor charge difference based on the current capacitor charge quantity and the rated capacitor charge quantity in the super capacitor, and determine the super capacitor attenuation rate for characterizing the super capacitor life state corresponding to the interval where the capacitor charge difference belongs by using the preset interval division rule.

[0016] Preferably, determine the corresponding replacement costs according to the attenuation rates, including:

[0017] Determine the expected life of the fuel cell according to the fuel cell attenuation rate, and determine the corresponding fuel cell replacement cost according to the expected life of the fuel cell.

[0018] Determine the expected life of the power battery according to the power battery attenuation rate, and determine the corresponding power battery replacement cost according to the expected life of the power battery.

[0019] Determine the expected life of the super capacitor according to the super capacitor attenuation rate, and determine the corresponding super capacitor replacement cost according to the expected life of the super capacitor.

[0020] Preferably, determine the consumption quantities corresponding to the multi - energy coupled power system for characterizing the consumption state based on the multi - energy coupled power system energy consumption determination model, including:

[0021] Determine the fuel consumption amount used to characterize the fuel consumption status based on the corresponding low calorific value of the fuel, the output power of the fuel cell, and the fuel cell efficiency;

[0022] Determine the power battery consumption amount used to characterize the power battery power consumption status based on the initial power battery power and the remaining power battery power;

[0023] Determine the supercapacitor consumption amount used to characterize the supercapacitor power consumption status based on the initial capacitance power and the remaining capacitance power of the supercapacitor.

[0024] Preferably, determine the corresponding operating costs according to each consumption amount, including:

[0025] Determine the corresponding fuel cell operating cost according to the fuel consumption amount and the fuel reference cost;

[0026] Determine the corresponding power battery operating cost according to the power battery consumption amount, the electric energy reference cost, and the power battery efficiency;

[0027] Determine the corresponding supercapacitor operating cost according to the supercapacitor consumption amount, the electric energy reference cost, and the supercapacitor efficiency.

[0028] Preferably, determine the life cycle cost corresponding to each operating cost and each replacement cost based on the multi - energy coupling power system life cycle model, including:

[0029] Determine the hybrid operating cost corresponding to the multi - energy coupling power system according to each operating cost;

[0030] Determine the hybrid replacement cost corresponding to the multi - energy coupling power system according to each replacement cost;

[0031] Obtain the hybrid equipment investment cost, hybrid equipment salvage value cost, and hybrid equipment maintenance cost corresponding to the multi - energy coupling power system;

[0032] Determine the corresponding life cycle cost according to the hybrid operating cost, hybrid replacement cost, hybrid equipment investment cost, hybrid equipment salvage value cost, and hybrid equipment maintenance cost.

[0033] Preferably, determine the corresponding life cycle cost according to the hybrid operating cost, hybrid replacement cost, hybrid equipment investment cost, hybrid equipment salvage value cost, and hybrid equipment maintenance cost, including:

[0034] Obtain the sum of the hybrid operating cost, hybrid replacement cost, hybrid equipment investment cost, and hybrid equipment maintenance cost;

[0035] Take the difference between the sum of the costs and the hybrid equipment salvage value cost as the life cycle cost.

[0036] On the other hand, the present application also provides an energy management strategy determination device, which is applied to a multi-energy coupling power system including a fuel cell, a power battery, and a super capacitor, and includes:

[0037] A replacement cost determination module, configured to determine, based on a multi-energy coupling power system life determination model, each attenuation rate for characterizing the life state corresponding to the multi-energy coupling power system, and determine the corresponding replacement costs according to each attenuation rate;

[0038] An operating cost determination module, configured to determine, based on a multi-energy coupling power system energy consumption determination model, each consumption amount for characterizing the consumption state corresponding to the multi-energy coupling power system, and determine the corresponding operating costs according to each consumption amount;

[0039] A life cycle cost determination module, configured to determine the life cycle costs corresponding to each operating cost and each replacement cost based on a multi-energy coupling power system life cycle model;

[0040] A management strategy module, configured to determine the energy management strategy corresponding to the multi-energy coupling power system according to the life cycle cost.

[0041] On the other hand, the present application also provides an electronic device, including a memory for storing a computer program;

[0042] A processor, configured to implement the steps of the above energy management strategy determination method when executing the computer program.

[0043] On the other hand, the present application also provides a computer-readable storage medium, on which a computer program is stored, and the computer program implements the steps of the above energy management strategy determination method when being executed by a processor.

[0044] It can be seen that the energy management strategy determination method provided by the present application couples the energy consumption economy of the multi-energy coupling power system into the operating cost, and couples the durability of the system into the replacement cost of the system. That is to say, the problem of determining the multi-objective optimization result of the complex energy management strategy is transformed into a single objective by the economic cost method. The transformed single objective is the cost model, which has strong persuasion ability, comprehensive consideration, and determines the energy management strategy from the perspective of the entire life cycle of the system product. Description of the Drawings

[0045] In order to more clearly illustrate the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1Flowchart of a method for determining an energy management strategy provided by an embodiment of the present application;

[0047] Figure 2 First schematic diagram of an energy management strategy provided by an embodiment of the present application;

[0048] Figure 3 Second schematic diagram of an energy management strategy provided by an embodiment of the present application;

[0049] Figure 4 Module diagram of an apparatus for determining an energy management strategy provided by an embodiment of the present application;

[0050] Figure 5 Structural diagram of an electronic device provided by another embodiment of the present application. Detailed implementation manners

[0051] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0052] The core of the present application is to provide a method, apparatus, device, and medium for determining an energy management strategy.

[0053] To enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0054] Figure 1 Flowchart of a method for determining an energy management strategy provided by an embodiment of the present application, as Figure 1 shown, includes the following processes:

[0055] S10: Determine each decay rate corresponding to the multi - energy coupling power system for characterizing the life state based on the life determination model of the multi - energy coupling power system, and determine the corresponding replacement costs according to each decay rate.

[0056] S11: Determine each consumption amount corresponding to the multi - energy coupling power system for characterizing the consumption state based on the energy consumption determination model of the multi - energy coupling power system, and determine the corresponding operating costs according to each consumption amount.

[0057] In a specific embodiment, the energy management strategy determination method provided by the present application is mainly applied to a multi - energy coupled power system including a fuel cell, a power battery, and a supercapacitor. Therefore, for the fuel cell, the fuel cell decay rate is determined according to the formula related to the fuel cell in the multi - energy coupled power system life determination model, and then the fuel cell replacement cost is determined according to the fuel cell decay rate; the fuel cell consumption is determined according to the formula related to the fuel cell in the multi - energy coupled power system energy consumption determination model, and then the fuel cell operating cost is further determined.

[0058] For the power battery, the power battery decay rate is determined according to the formula related to the power battery in the multi - energy coupled power system life determination model, and then the power battery replacement cost is determined according to the power battery decay rate; the power battery consumption is determined according to the formula related to the power battery in the multi - energy coupled power system energy consumption determination model, and then the power battery operating cost is further determined.

[0059] For the supercapacitor, the supercapacitor decay rate is determined according to the formula related to the supercapacitor in the multi - energy coupled power system life determination model, and then the supercapacitor replacement cost is determined according to the supercapacitor decay rate; the supercapacitor consumption is determined according to the formula related to the supercapacitor in the multi - energy coupled power system energy consumption determination model, and then the supercapacitor operating cost is further determined.

[0060] Among them, the sum of the fuel cell replacement cost, the power battery replacement cost, and the supercapacitor replacement cost is used as the hybrid replacement cost of the current multi - energy coupled power system; the sum of the fuel cell operating cost, the power battery operating cost, and the supercapacitor operating cost is used as the hybrid operating cost of the current multi - energy coupled power system.

[0061] S12: Determine the life - cycle costs corresponding to each operating cost and each replacement cost based on the multi - energy coupled power system life - cycle model.

[0062] S13: Determine the energy management strategy corresponding to the multi - energy coupled power system according to the life - cycle costs.

[0063] In a specific embodiment, in the multi - energy coupled power system, in addition to the hybrid replacement cost and the hybrid operating cost during use, the cost of equipment, maintenance cost, etc. are also required. Therefore, it is necessary to determine the life - cycle cost according to all cost data. The unit of the life - cycle cost can be the cost per year, per day, or per single use. Finally, the energy management strategy corresponding to the current multi - energy coupled power system is determined according to the cost and so on.

[0064] For example, a single trip from location A to location B, and the final life cycle cost also represents the cost of a single trip. Based on this life cycle cost, the cost performance of a single trip in the current multi - energy coupled power system can be determined. If it is higher than the average cost of the market, it indicates a lower cost performance, and corresponding management strategies can be adopted (for example, appropriately select the power system with a lower price according to the electricity price and fuel price); if it is lower than the average cost of the market, it indicates a higher cost performance.

[0065] The present application provides a method for determining an energy management strategy, including: determining each attenuation rate corresponding to the multi - energy coupled power system for characterizing the life state based on a multi - energy coupled power system life determination model, and determining the corresponding replacement costs according to each attenuation rate; determining each consumption amount corresponding to the multi - energy coupled power system for characterizing the consumption state based on a multi - energy coupled power system energy consumption determination model, and determining the corresponding operating costs according to each consumption amount; determining the life cycle costs corresponding to each operating cost and each replacement cost based on a multi - energy coupled power system life cycle model; and determining the energy management strategy corresponding to the multi - energy coupled power system according to the life cycle costs. Thus, it can be seen that the method for determining an energy management strategy provided by the present application couples the energy consumption economy of the multi - energy coupled power system into the operating cost, and couples the durability of the system into the replacement cost of the system. That is to say, the evaluation problem of the multi - objective optimization result of the complex energy management strategy is transformed into a single objective through the method of economic cost. The transformed single objective is a cost model, which has strong persuasion ability, comprehensive consideration, and evaluates and determines the energy management strategy from the perspective of the full life cycle of the system product.

[0066] On the basis of the above - mentioned embodiment, as a preferred embodiment, the specific implementation manner of the above - mentioned S10 step: determining each attenuation rate corresponding to the multi - energy coupled power system for characterizing the life state based on a multi - energy coupled power system life determination model is as follows: determining the fuel cell attenuation amount based on the corresponding operating condition correction parameter in the fuel cell, the voltage attenuation value corresponding to different operating conditions, and the operating time, and determining the fuel cell attenuation rate for characterizing the life state of the fuel cell according to the fuel cell attenuation amount and the preset voltage attenuation value; determining the battery charge difference based on the current battery charge amount and the rated battery charge amount in the power battery, and determining the power battery attenuation rate for characterizing the life state of the power battery corresponding to the interval where the battery charge difference belongs by using a preset interval division rule; determining the capacitor charge difference based on the current capacitor charge amount and the rated capacitor charge amount in the super capacitor, and determining the super capacitor attenuation rate for characterizing the life state of the super capacitor corresponding to the interval where the capacitor charge difference belongs by using a preset interval division rule.

[0067] For fuel cells: In a specific embodiment, the main indicator for determining the degree of fuel cell performance degradation is the voltage degradation rate. The voltage of a fuel cell will decrease as the usage time increases. When the voltage of a single fuel cell drops to 90% of the rated voltage, the output power of the fuel cell will decrease significantly, and at this time, the fuel cell's life ends.

[0068] The definition of the fuel cell degradation amount is:

[0069] ;

[0070] Wherein, is the fuel cell degradation amount; is the operating condition correction parameter; is the voltage degradation value corresponding to the start-stop operating condition; is the voltage degradation value corresponding to the low-power operating condition; is the voltage degradation value under the unit load power change operating condition; is the voltage degradation value corresponding to the high-power operating condition; is the average number of start-stop cycles; is the average number of load power change cycles; is the average low-power load operation time; is the average high-power load operation time.

[0071] The definition of the fuel cell degradation rate is:

[0072] ;

[0073] Wherein, is the fuel cell degradation rate; is the preset voltage degradation value, which can also be understood as the allowable voltage degradation value of the fuel cell from the start of use to the end of its life. Therefore, the smaller the fuel cell degradation rate, the longer the expected life of the fuel cell and the better its durability.

[0074] For power batteries, the life of power batteries is evaluated based on their performance degradation rate, and their performance degradation rate is related to the depth of discharge and the number of uses. The depth of discharge (DOD) is the difference between the rated state of charge (SOC) of the power battery and the current state of charge, and its calculation method is:

[0075] ;

[0076] Wherein, is the rated state of charge corresponding to the power battery; is the current state of charge corresponding to the power battery, is the depth of discharge of the power battery, and i is the corresponding interval. The depth of discharge of the power battery is divided into 9 intervals: 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%.

[0077] is defined as:

[0078] ;

[0079] At the same time, it should be noted that it cannot be guaranteed that i is an integer. It may be 1.1 or 2.3, etc. In this case, select the corresponding preset interval division rule (for example: rounding), then the final i is 1 or 2, etc.

[0080] The power battery attenuation rate is defined as: the ratio of the charge and discharge cycles of the power battery to the maximum allowable charge and discharge cycles at different depths of discharge. Its expression is:

[0081] ;

[0082] Among them, is the power battery attenuation rate; is the charge and discharge cycle times within the interval after the vehicle completes the operating conditions; is the maximum charge and discharge cycle times within the interval. Therefore, the smaller the performance attenuation rate, the longer the expected life of the energy source and the better its durability performance.

[0083] For supercapacitors, the life of the supercapacitors is determined according to their performance attenuation rate, and its life determination model is the same as that of the power battery. The depth of discharge of the supercapacitor is:

[0084] ;

[0085] ;

[0086] Among them, is the rated capacitance charge amount corresponding to the supercapacitor; is the current capacitance charge amount corresponding to the supercapacitor, is the depth of discharge of the supercapacitor. The supercapacitor attenuation rate expression is:

[0087] ;

[0088] Among them, is the supercapacitor attenuation rate; is the charge and discharge cycle times within the interval after the vehicle completes the operating conditions; is within the The maximum number of charge and discharge cycles within the interval.

[0089] Correspondingly, the implementation method for determining the corresponding replacement cost according to each attenuation rate is as follows: Determine the expected life of the fuel cell according to the fuel cell attenuation rate, and determine the corresponding fuel cell replacement cost according to the expected life of the fuel cell; Determine the expected life of the power battery according to the power battery attenuation rate, and determine the corresponding power battery replacement cost according to the expected life of the power battery; Determine the expected life of the supercapacitor according to the supercapacitor attenuation rate, and determine the corresponding supercapacitor replacement cost according to the expected life of the supercapacitor.

[0090] For fuel cells, events such as operating at a large or small power for a long time, frequent start-stop, and power change will all lead to the performance attenuation of the fuel cell system. The replacement cost expression of the fuel cell is:

[0091] ;

[0092] Among them, is the fuel cell replacement cost, is the number of fuel cells that need to be replaced; is the capital recovery factor; is the system power of the fuel cell; is the reference cost of the fuel cell.

[0093] Its expression is:

[0094] ;

[0095] Among them, is the expected life of the fuel cell, is the ceiling function.

[0096] During the operation of the multi-energy coupled power system, when the voltage of a single fuel cell drops to 90% of the rated voltage (this value is determined by different manufacturers), the output power of the fuel cell will drop significantly, and the fuel cell life ends. The fuel cell attenuation rate is defined as the ratio of the current voltage drop due to performance attenuation to the maximum allowable voltage drop. The fuel cell expected life is inversely proportional to the fuel cell attenuation rate , and its expression is:

[0097] ;

[0098] For power batteries: The depth of discharge and the number of charge and discharge cycles of the power battery will affect the performance attenuation rate of the equipment. To simplify the model, the influence of other aging parameters (temperature, current, etc.) has been ignored. The power battery replacement cost expression is:

[0099] ;

[0100] ;

[0101] Among them, is the replacement cost of the power battery, is the number of power batteries to be replaced; is the capital recovery factor; is the resistance capacity of the power battery; is the reference cost of the power battery; is the expected life of the power battery, is the ceiling function. The expected life of the power battery The expression is:

[0102] ;

[0103] Among them, is the floating charge life of the power battery; After the vehicle completes the driving condition, the power battery is in The number of charge and discharge cycles within the interval; is within The maximum number of charge and discharge cycles allowed within the interval.

[0104] For supercapacitors, the supercapacitor and the power battery have similar equipment life characteristics. Just change the power battery scenario to the supercapacitor scenario. Therefore, the expression for the replacement cost of the supercapacitor is:

[0105] ;

[0106] ;

[0107] Among them, is the replacement cost of the supercapacitor, is the number of power batteries to be replaced; is the capital recovery factor; is the resistance capacity of the supercapacitor; is the reference cost of the supercapacitor; is the expected life of the supercapacitor, is the ceiling function. The expected life of the power battery The expression is:

[0108] ;

[0109] Among them, is the floating charge life of the supercapacitor; After the vehicle completes the driving condition, the number of charge and discharge cycles of the supercapacitor within the range; is the maximum allowable number of charge and discharge cycles within the range.

[0110] In summary, the expression for the hybrid replacement cost is:

[0111] ;

[0112] where is the hybrid replacement cost, that is, the fuel cell replacement cost , the power battery replacement cost and the supercapacitor replacement cost sum.

[0113] It should be noted that the embodiments provided in this application are only one implementable way, but are not limited to only this implementation way and can be set by users according to their needs.

[0114] This application provides a calculation method for the replacement costs of fuel cells, power batteries, and supercapacitors in a multi - energy coupling power system. This method reflects the lifespan with the attenuation rate and the loss with the replacement cost, laying a foundation for the calculation of the overall cost in the subsequent multi - energy coupling power system.

[0115] Based on the above - mentioned embodiments, as a preferred embodiment, in the above S11 step: The implementation manner for determining each consumption quantity used to characterize the consumption state corresponding to the multi - energy coupling power system based on the multi - energy coupling power system energy consumption determination model is as follows: Determine the fuel consumption quantity used to characterize the fuel consumption state based on the corresponding low - calorific value of the fuel, the fuel cell output power, and the fuel cell efficiency in the fuel cell; Determine the power battery consumption quantity used to characterize the power battery consumption state based on the initial power battery power and the remaining power battery power; Determine the supercapacitor consumption quantity used to characterize the supercapacitor consumption state based on the initial capacitor charge and the remaining capacitor charge of the supercapacitor.

[0116] For a fuel cell (such as a hydrogen fuel cell), a hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy, and its hydrogen fuel consumption is directly related to the power of the fuel cell. Therefore, the energy consumption model of the fuel cell is directly determined by its hydrogen fuel consumption. The lower the hydrogen fuel consumption, the lower the energy consumption of the fuel cell and the better its economy.

[0117] The fuel cell energy consumption determination model is:

[0118] ;

[0119] where is the fuel consumption (hydrogen fuel consumption); is the lower heating value of the fuel (lower heating value of hydrogen), taking 120 kJ / g; is the output power of the fuel cell system; is the fuel cell efficiency. Thus, it is determined that the fuel consumption increases as the output power of the fuel cell system increases.

[0120] For power batteries and supercapacitors, as energy storage systems in a multi - energy coupling power system, power batteries and supercapacitors not only need to compensate for the energy of the fuel cell during the traction condition, but also need to recover energy during the braking condition. During the driving task of the vehicle, power batteries and supercapacitors will undergo several charge - discharge processes. When the vehicle reaches the starting and ending points, the external circuit will restore the charge of the power batteries and supercapacitors to the initial state. The vehicle is not connected to the power grid during the operation interval and only connects to the external circuit when it returns to the starting and ending points. Therefore, the electrical energy supplemented at the starting and ending points can be used as the energy consumption determination standard for power batteries and supercapacitors.

[0121] The energy consumption determination model for power batteries is:

[0122] ;

[0123] where is the power battery consumption, is the initial power battery charge (which can also be understood as the electrical energy contained in the initial state of the power battery); is the remaining power battery charge (which can also be understood as the electrical energy remaining in the power battery after completing the driving task).

[0124] The energy consumption determination model for supercapacitors is:

[0125] ;

[0126] where is the supercapacitor consumption, is the initial capacitor charge (which can also be understood as the electrical energy contained in the initial state of the supercapacitor); is the remaining capacitor charge (which can also be understood as the electrical energy remaining in the supercapacitor after completing the driving task).

[0127] The corresponding implementation method for determining the corresponding operating cost according to each consumption is: determining the corresponding fuel cell operating cost according to the fuel consumption and the fuel reference cost; determining the corresponding power battery operating cost according to the power battery consumption, the electrical energy reference cost, and the power battery efficiency; determining the corresponding supercapacitor operating cost according to the supercapacitor consumption, the electrical energy reference cost, and the supercapacitor efficiency.

[0128] For a fuel cell, the operating cost of the fuel cell can be the consumption cost of the fuel consumption. The expression for the hydrogen fuel consumption cost of the fuel cell is as follows:

[0129] ;

[0130] Among them, is the operating cost of the fuel cell, is the reference cost of the fuel, is the fuel consumption.

[0131] For a power battery, the expression for the operating cost of the power battery is as follows:

[0132] ;

[0133] Among them, is the operating cost of the power battery; is the consumption of the power battery; is the reference cost of the electric energy; is the efficiency of the power battery.

[0134] For a super capacitor, the expression for the operating cost of the super capacitor is as follows:

[0135] ;

[0136] Among them, is the operating cost of the super capacitor; is the consumption of the super capacitor; is the reference cost of the electric energy; is the efficiency of the super capacitor.

[0137] In summary, the expression for the hybrid operating cost is as follows:

[0138] ;

[0139] Among them, is the hybrid operating cost, that is, the operating cost of the fuel cell , the operating cost of the power battery and the operating cost of the super capacitor sum.

[0140] It should be noted that the embodiments provided in this application are only one implementable way, but are not limited to only this implementable way, and can be set by the user according to needs.

[0141] The present application provides a calculation method for the operating costs of fuel cells, power batteries, and supercapacitors in a multi - energy coupling power system. This method reflects the consumption status in terms of consumption quantity and the operating losses in terms of operating costs, laying a foundation for the calculation of the overall cost in the subsequent multi - energy coupling power system.

[0142] In a specific embodiment, in the above - mentioned S12 step, the implementation method for determining the life - cycle costs corresponding to each operating cost and each replacement cost based on the life - cycle model of the multi - energy coupling power system is as follows: Determine the hybrid operating cost corresponding to the multi - energy coupling power system according to each operating cost; determine the hybrid replacement cost corresponding to the multi - energy coupling power system according to each replacement cost; obtain the hybrid equipment investment cost, hybrid equipment residual value cost, and hybrid equipment maintenance cost corresponding to the multi - energy coupling power system; determine the corresponding life - cycle cost according to the hybrid operating cost, hybrid replacement cost, hybrid equipment investment cost, hybrid equipment residual value cost, and hybrid equipment maintenance cost.

[0143] In a specific embodiment, from the perspective of the generation stage of the multi - energy coupling power system, it includes the costs of 5 stages: hybrid equipment investment cost (fuel cell investment cost, power battery investment cost, supercapacitor investment cost), hybrid operating cost (fuel cell operating cost, power battery operating cost, supercapacitor operating cost), hybrid replacement cost (fuel cell replacement cost, power battery replacement cost, supercapacitor replacement cost), hybrid equipment maintenance cost (fuel cell maintenance cost, power battery maintenance cost, supercapacitor maintenance cost), and hybrid equipment residual value cost (fuel cell residual value cost, power battery residual value cost, supercapacitor residual value cost).

[0144] The expression of the life - cycle cost is:

[0145] ;

[0146] Wherein, is the life - cycle cost corresponding to the multi - energy coupling power system; is the total cost of the fuel cell; is the total cost of the power battery; is the total cost of the supercapacitor; is the hybrid equipment investment cost; is the hybrid operating cost; is the hybrid replacement cost; is the hybrid equipment maintenance cost; is the hybrid equipment residual value cost.

[0147] The hybrid equipment investment cost The expression of

[0148] ;

[0149] Among them, is the investment cost of the fuel cell; is the investment cost of the power battery; is the investment cost of the supercapacitor.

[0150] For the fuel cell, its fuel cell investment cost has the following expression:

[0151] ;

[0152] Among them, is the DC / DC power corresponding to the fuel cell; is the reference cost corresponding to the DC / DC, provided by the supplier; is the output power of the fuel cell system; is the reference cost of the fuel cell, provided by the supplier; is the capital recovery factor.

[0153] Its capital recovery factor has the following expression:

[0154] ;

[0155] Among them, I is the interest rate; T is the lifespan of the multi - energy coupled power system.

[0156] For the power battery, its power battery investment cost has the following expression:

[0157] ;

[0158] Among them, is the DC / DC power corresponding to the power battery; is the reference cost corresponding to the DC / DC, provided by the supplier; is the resistance capacity of the power battery; is the reference cost of the power battery; is the capital recovery factor.

[0159] For the supercapacitor, its supercapacitor investment cost has the following expression:

[0160] ;

[0161] Among them, is the DC / DC power corresponding to the supercapacitor; is the reference cost corresponding to the DC / DC, provided by the supplier; is the resistance capacity of the supercapacitor; is the reference cost of the supercapacitor; is the capital recovery factor.

[0162] The maintenance cost of the hybrid device has the following expression:

[0163] ;

[0164] where is the maintenance cost of the fuel cell; is the maintenance cost of the power battery; is the maintenance cost of the supercapacitor.

[0165] For the maintenance cost of the fuel cell it has the following expression:

[0166] ;

[0167] ;

[0168] ;

[0169] where is the maintenance cost of the fuel cell system at different operating stages before the end of the life of a single fuel cell system; is the basic maintenance cost of the fuel cell system; is the maintenance cycle of the fuel cell system; is the total operating time of the fuel cell; is the operating time when the output power of the fuel cell is below 40% of the rated power; is the operating time when the output power of the fuel cell is between 40% and 70% of the rated power; is the operating time when the output power of the fuel cell is above 70% of the rated power.

[0170] For the power battery and the supercapacitor, their power battery maintenance cost and supercapacitor maintenance cost are constants, and their sum is const, and the expression is:

[0171] ;

[0172] The residual value cost of the hybrid device has the following expression:

[0173] ;

[0174] where is the residual value cost of the fuel cell; residual value cost of the power battery; Supercapacitor residual value cost.

[0175] In summary, the total cost of its fuel cell The expression is:

[0176] ;

[0177] Total cost of power battery The expression is:

[0178] ;

[0179] Total cost of supercapacitor The expression is:

[0180] ;

[0181] In summary, the schematic diagram of its energy management strategy determination system is as shown in Figure 2 and Figure 3 shown.

[0182] Among them, Figure 2 In the vehicle in , the wheels, transmission components, and drive motor in the vehicle conduct signal flow and energy flow transmission, while the drive motor conducts signal flow and energy flow transmission with the multi - energy coupling power system through the energy management strategy (energy management strategy determination method).

[0183] It should be noted that this energy management strategy determination system is mainly applied to the development work of the energy management strategy of hydrogen - energy vehicles. During the development of the energy management strategy, by inputting the vehicle working conditions, the required power of the multi - energy coupling power system is calculated. The energy management strategy distributes the required power to different power sources according to certain rules and methods. Different power sources will output corresponding power according to the required indicators, and each system works together to complete a single operation of the hydrogen - energy vehicle.

[0184] After completing a single operation of the hydrogen - energy vehicle, the information and real - time operation data of each power source in this process are imported into this determination method. Through this determination method, the operation cost, replacement cost, and maintenance cost of the hydrogen - energy vehicle for completing a single working condition operation under this energy management strategy are calculated. Then, by counting the number of times the vehicle operates under this working condition per day and multiplying by 365 days, the annual operation cost, replacement cost, and maintenance cost of the hydrogen - energy vehicle can be obtained; adding the hybrid equipment investment cost and the hybrid equipment residual value cost can obtain the annual cost of the hydrogen - energy vehicle, and dividing by 365 days can obtain the daily cost of the hydrogen - energy vehicle. The optimization effect of the developed energy management control strategy can be judged by the level of this cost.

[0185] The present application provides a method for determining an energy management strategy, including: determining each decay rate corresponding to the multi-energy coupling power system for characterizing the life state based on the life determination model of the multi-energy coupling power system, and determining the corresponding replacement costs according to each decay rate; determining each consumption amount corresponding to the multi-energy coupling power system for characterizing the consumption state based on the energy consumption determination model of the multi-energy coupling power system, and determining the corresponding operation costs according to each consumption amount; determining the life cycle costs corresponding to each operation cost and each replacement cost based on the life cycle model of the multi-energy coupling power system; and determining the energy management strategy corresponding to the multi-energy coupling power system according to the life cycle costs. It can be seen that the method for determining the energy management strategy provided by the present application couples the energy consumption economy of the multi-energy coupling power system into the operation cost, and couples the durability of the system into the replacement cost of the system. That is to say, the problem of determining the multi-objective optimization result of the complex energy management strategy is transformed into a single objective by the method of economic cost. The transformed single objective is a cost model, which has strong persuasion ability, comprehensive consideration, and determines the energy management strategy from the perspective of the whole life cycle of the system product.

[0186] In the above embodiment, the method for determining the energy management strategy is described in detail. The present application also provides an embodiment corresponding to the device for determining the energy management strategy. It should be noted that the present application describes the embodiment of the device part from two perspectives, one is from the perspective of functional modules, and the other is from the perspective of hardware.

[0187] Figure 4 The block diagram of a device for determining an energy management strategy provided by an embodiment of the present application includes:

[0188] The replacement cost determination module 11 is configured to determine each decay rate corresponding to the multi-energy coupling power system for characterizing the life state based on the life determination model of the multi-energy coupling power system, and determine the corresponding replacement costs according to each decay rate;

[0189] The operation cost determination module 12 is configured to determine each consumption amount corresponding to the multi-energy coupling power system for characterizing the consumption state based on the energy consumption determination model of the multi-energy coupling power system, and determine the corresponding operation costs according to each consumption amount;

[0190] The life cycle cost determination module 13 is configured to determine the life cycle costs corresponding to each operation cost and each replacement cost based on the life cycle model of the multi-energy coupling power system;

[0191] The management strategy module 14 is configured to determine the energy management strategy corresponding to the multi-energy coupling power system according to the life cycle costs.

[0192] Since the embodiments in the apparatus part correspond to those in the method part, please refer to the descriptions of the embodiments in the method part for the embodiments in the apparatus part, which will not be elaborated here.

[0193] Figure 5 The structural diagram of an electronic device provided in another embodiment of this application is as Figure 5 shown. The electronic device includes: a memory 20 for storing computer programs;

[0194] a processor 21 for implementing the steps of the energy management strategy determination method mentioned in the above embodiments when executing the computer programs.

[0195] The electronic device provided in this embodiment may include, but is not limited to, a smart phone, a tablet computer, a laptop computer, or a desktop computer, etc.

[0196] Among them, the processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 may be implemented in at least one hardware form of a digital signal processor (DSP), a field-programmable gate array (FPGA), or a programmable logic array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the wake state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 21 may be integrated with a graphics processing unit (GPU), and the GPU is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 21 may further include an artificial intelligence (AI) processor, and the AI processor is used to process computational operations related to machine learning.

[0197] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices and flash storage devices. In this embodiment, the memory 20 is at least used to store the following computer program 201. After the computer program is loaded and executed by the processor 21, the related steps for determining the energy management strategy disclosed in any of the foregoing embodiments can be implemented. In addition, the resources stored in the memory 20 may also include an operating system 202, data 203, etc., and the storage method may be transient storage or permanent storage. Among them, the operating system 202 may include Windows, Unix, Linux, etc.

[0198] In some embodiments, the electronic device may further include a display screen 22, an input / output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.

[0199] Those skilled in the art can understand that Figure 5 the structure shown in does not constitute a limitation on the electronic device, and it may include more or fewer components than shown in the figure.

[0200] The electronic device provided by the embodiment of the present application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the above-mentioned method for determining the energy management strategy and has the same beneficial effects.

[0201] Finally, the present application also provides an embodiment corresponding to a computer-readable storage medium. A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps recorded in the above method embodiment are implemented.

[0202] It can be understood that if the method in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and executes all or part of the steps of the methods described in the various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0203] The above has introduced in detail a method, apparatus, device, and medium for determining an energy management strategy provided by the present application. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and reference can be made to the description in the method part for related parts. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0204] It should also be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article, or device. Without further limitation, an element defined by the phrase "including one..." does not exclude the existence of additional identical elements in the process, method, article, or device including the said element.

Claims

1. A method for determining an energy management strategy, characterized in that Applied to a multi - energy coupling power system including a fuel cell, a power battery, and a super capacitor, it includes: Determine each attenuation rate corresponding to the multi - energy coupling power system for characterizing the life state based on the multi - energy coupling power system life determination model, and determine the corresponding replacement costs according to each attenuation rate; Determine each consumption amount corresponding to the multi - energy coupling power system for characterizing the consumption state based on the multi - energy coupling power system energy consumption determination model, and determine the corresponding operating costs according to each consumption amount; Determine the life - cycle costs corresponding to each of the operating costs and each of the replacement costs based on the multi - energy coupling power system life - cycle model; Determine the energy management strategy corresponding to the multi - energy coupling power system according to the life - cycle costs.

2. The method for determining the energy management strategy according to claim 1, wherein The step of determining each attenuation rate corresponding to the multi - energy coupling power system for characterizing the life state based on the multi - energy coupling power system life determination model includes: Determine the fuel cell attenuation amount based on the corresponding condition correction parameter in the fuel cell, the voltage attenuation value corresponding to different conditions, and the operating time, and determine the fuel cell attenuation rate for characterizing the fuel cell life state according to the fuel cell attenuation amount and the preset voltage attenuation value; Determine the battery charge difference based on the current battery charge amount and the rated battery charge amount in the power battery, and use the preset interval division rule to determine the power battery attenuation rate corresponding to the interval to which the battery charge difference belongs for characterizing the power battery life state; Determine the capacitor charge difference based on the current capacitor charge amount and the rated capacitor charge amount in the super capacitor, and use the preset interval division rule to determine the super capacitor attenuation rate corresponding to the interval to which the capacitor charge difference belongs for characterizing the super capacitor life state.

3. The method for determining an energy management strategy according to claim 2, wherein Determining the corresponding replacement costs according to each attenuation rate includes: Determine the expected life of the fuel cell according to the fuel cell attenuation rate, and determine the corresponding fuel cell replacement cost according to the expected life of the fuel cell; Determine the expected life of the power battery according to the power battery attenuation rate, and determine the corresponding power battery replacement cost according to the expected life of the power battery; Determine the expected life of the super capacitor according to the super capacitor attenuation rate, and determine the corresponding super capacitor replacement cost according to the expected life of the super capacitor.

4. The method for determining the energy management strategy according to claim 1, wherein The step of determining each consumption amount corresponding to the multi - energy coupling power system for characterizing the consumption state based on the multi - energy coupling power system energy consumption determination model includes: Determine the fuel consumption amount for characterizing the fuel consumption state based on the corresponding low - calorific value of the fuel, the fuel cell output power, and the fuel cell efficiency in the fuel cell; Determine the power battery consumption amount for characterizing the power battery consumption state based on the initial power battery charge amount and the remaining power battery charge amount in the power battery; Determine the super capacitor consumption amount for characterizing the super capacitor consumption state based on the initial capacitor charge amount and the remaining capacitor charge amount in the super capacitor.

5. The method for determining an energy management strategy according to claim 4, wherein Determining the corresponding operating costs according to each consumption amount includes: Determine the corresponding fuel cell operating cost according to the fuel consumption amount and the fuel reference cost; Determine the corresponding operating cost of the power battery according to the consumption of the power battery, the reference cost of electric energy, and the efficiency of the power battery; Determine the corresponding operating cost of the supercapacitor according to the consumption of the supercapacitor, the reference cost of electric energy, and the efficiency of the supercapacitor.

6. The method for determining an energy management strategy according to claim 1, wherein The determining of the life cycle cost corresponding to each of the operating costs and each of the replacement costs based on the multi-energy coupled power system life cycle model includes: Determine the hybrid operating cost corresponding to the multi-energy coupled power system according to each of the operating costs; Determine the hybrid replacement cost corresponding to the multi-energy coupled power system according to each of the replacement costs; Obtain the hybrid equipment investment cost, the hybrid equipment residual value cost, and the hybrid equipment maintenance cost corresponding to the multi-energy coupled power system; Determine the corresponding life cycle cost according to the hybrid operating cost, the hybrid replacement cost, the hybrid equipment investment cost, the hybrid equipment residual value cost, and the hybrid equipment maintenance cost.

7. The method for determining an energy management strategy according to claim 6, wherein The determining of the corresponding life cycle cost according to the hybrid operating cost, the hybrid replacement cost, the hybrid equipment investment cost, the hybrid equipment residual value cost, and the hybrid equipment maintenance cost includes: Obtain the sum of the hybrid operating cost, the hybrid replacement cost, the hybrid equipment investment cost, and the hybrid equipment maintenance cost; Take the difference between the sum of the costs and the hybrid equipment residual value cost as the life cycle cost.

8. An energy management strategy determination device, characterized in that, Applied to a multi-energy coupled power system including a fuel cell, a power battery, and a supercapacitor, it includes: A replacement cost determination module, configured to determine each attenuation rate corresponding to the life state of the multi-energy coupled power system based on a multi-energy coupled power system life determination model, and determine the corresponding replacement costs according to each attenuation rate; An operating cost determination module, configured to determine each consumption corresponding to the consumption state of the multi-energy coupled power system based on a multi-energy coupled power system energy consumption determination model, and determine the corresponding operating costs according to each consumption; A life cycle cost determination module, configured to determine the life cycle cost corresponding to each of the operating costs and each of the replacement costs based on a multi-energy coupled power system life cycle model; A management strategy module, configured to determine the energy management strategy corresponding to the multi-energy coupled power system according to the life cycle cost.

9. An electronic device, characterized in that, Including a memory for storing a computer program; A processor, configured to implement the steps of the energy management strategy determination method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the energy management strategy determination method according to any one of claims 1 to 7 are implemented.

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