Design method, device and equipment of power supply system and storage medium

Abstract

The invention provides a design method and device of a power supply system, equipment and a storage medium. The design method of the power supply system comprises the steps of obtaining power consumption demand parameters of a user, market price parameters and technical related parameters of the power supply system; the power supply system comprises a photovoltaic-wind power system, an inverter and an energy station, the energy station comprises an energy storage battery, an electrolytic cell, a hydrogen storage module and a fuel cell, to-be-designed parameters are determined according to power utilization demand parameters and technology related parameters, and the energy station is designed according to the to-be-designed parameters and market price parameters. The first total cost of the first power supply mode and the second total cost of the second power supply mode are determined, and the target power supply mode is determined according to the first total cost and the second total cost, so that the power supply mode which meets user requirements and is lower in cost is determined, and the design effect of the power supply system is optimized.

Description

Technical Field

[0001] The present application relates to the field of new energy, and in particular to a design method, device, equipment and storage medium for a power supply system. Background Art

[0002] Photovoltaic-wind power, electrochemical energy storage, and hydrogen energy storage are important directions for the development of new energy and will play an increasingly important role in the future energy system. For areas that are out of reach of the public power grid or have insufficient power supply, such as farms, ranches, islands, and mountainous areas, it is necessary to ensure a certain number of days of power storage backup capacity to ensure the safety of power supply in severe weather conditions. On the other hand, while considering the storage backup capacity, how to control costs as much as possible is a problem that needs to be solved. Summary of the invention

[0003] The embodiments of the present application provide a design method, device, equipment and storage medium for a power supply system to solve at least one problem existing in the related art. The technical solution is as follows:

[0004] In a first aspect, an embodiment of the present application provides a method for designing a power supply system, including:

[0005] Obtaining the user's electricity demand parameters, market price parameters and technical parameters of the power supply system; the power supply system includes a photovoltaic-wind power system, an inverter and an energy station, and the energy station includes an energy storage battery, an electrolyzer, a hydrogen storage module and a fuel cell;

[0006] Determining the parameters to be designed according to the power demand parameters and the technical related parameters;

[0007] Determining a first total cost of a first power supply mode and a second total cost of a second power supply mode according to the parameters to be designed and the market price parameters;

[0008] determining a target power supply mode according to the first total cost and the second total cost;

[0009] Among them, the first power supply mode is powered by photovoltaic-wind power and energy storage batteries, and the second power supply mode is powered by photovoltaic-wind power, energy storage batteries and hydrogen energy storage.

[0010] In one embodiment, the power demand parameters include the total annual power consumption of the power load end, the technical related parameters include inverter conversion efficiency, energy storage battery charging efficiency, energy storage battery discharge efficiency, annual utilization hours and 20-year life attenuation rate of the photovoltaic-wind power system, and the parameters to be designed include the installed power of the photovoltaic-wind power system;

[0011] Determining the parameters to be designed according to the power demand parameters and the technical related parameters includes:

[0012] When the first power supply mode is used for power supply, a first difference between a preset value and a 20-year life attenuation rate of the photovoltaic-wind power system is determined, and a first product of the inverter conversion efficiency, the energy storage battery charging efficiency, the energy storage battery discharging efficiency, the annual utilization hours and the first difference is determined; and the installed power of the photovoltaic-wind power system is determined according to a first ratio of the total annual power consumption of the power load end to the first product;

[0013] When the second power supply mode is used for power supply, the inverter conversion efficiency, the electrolysis efficiency of the electrolyzer, the charging and discharging efficiency of the hydrogen storage module, the fuel cell power generation efficiency, the second product of the annual utilization hours and the first difference are determined, and the installed power of the photovoltaic-wind power system is determined based on the second ratio of the total annual electricity consumption at the power load end to the second product.

[0014] In one embodiment, the technical related parameters also include the maximum daily utilization hours, and the parameters to be designed also include the electrolytic cell power;

[0015] The determining of the parameters to be designed according to the power demand parameters and the technical related parameters further comprises:

[0016] Determine the third product of the installed power of the photovoltaic-wind power system and the maximum daily utilization hours, and determine the power of the electrolyzer according to a third ratio of the third product to 24;

[0017] or,

[0018] Determine the fourth product of the installed power of the photovoltaic-wind power system and the annual utilization hours, and determine the fifth product of 24 and 360. Determine the power of the electrolyzer based on the fourth ratio of the fourth product to the fifth product.

[0019] In one embodiment, the power demand parameters also include the maximum daily power consumption of the power load end, the user's energy storage days requirement, and the maximum power demand of the power load end. The technical related parameters include the power generation of 1kg hydrogen. The parameters to be designed include the power of the energy storage battery, the hydrogen storage capacity of the hydrogen storage module, and the power generation power of the fuel cell.

[0020] The determining of the parameters to be designed according to the power demand parameters and the technical related parameters further comprises:

[0021] Determine that the power of the energy storage battery is greater than or equal to the maximum power consumption of the power load in a single day;

[0022] Determine the fifth product of the maximum daily power consumption of the power load end and the number of energy storage days required by the user, calculate the second difference between the fifth product and the power of the energy storage battery, and determine the hydrogen storage capacity of the hydrogen storage module according to the fifth ratio of the second difference and the power generation of 1kg of hydrogen;

[0023] The fuel cell power generation is determined as the maximum power demand of the power load end.

[0024] In one embodiment, the market price parameters include the unit price of photovoltaic-wind power system and the unit price of energy storage battery;

[0025] Determining a first total cost of the first power supply mode according to the parameters to be designed and the market price parameters includes:

[0026] Determine a sixth product of the installed power of the photovoltaic-wind power system and the unit price of the photovoltaic-wind power system when power is supplied using the first power supply mode;

[0027] Determine the seventh product of the energy storage battery capacity and the unit price of the energy storage battery;

[0028] A first total cost of the first power supply mode is determined according to the sum of the sixth product and the seventh product.

[0029] In one embodiment, the market price parameters also include the electrolyzer unit price, the hydrogen storage module unit price, and the fuel cell unit price;

[0030] Determining the second total cost of the second power supply mode according to the parameters to be designed and the market price parameters includes:

[0031] Determine an eighth product of the installed power of the photovoltaic-wind power system and the unit price of the photovoltaic-wind power system when power is supplied using the second power supply mode;

[0032] Determine the ninth product of the energy storage battery capacity and the unit price of the energy storage battery;

[0033] Determine the tenth product of the installed power of the photovoltaic-wind power system, the power of the electrolyzer, and the unit price of the electrolyzer when power is supplied using the second power supply mode;

[0034] Determine the eleventh product of the hydrogen storage capacity of the hydrogen storage module and the unit price of the hydrogen storage module;

[0035] Determine the twelfth product of the power generated by the fuel cell and the unit price of the fuel cell;

[0036] The sum of the eighth product, the ninth product, the tenth product, the eleventh product and the twelfth product is determined to obtain a second total cost of the second power supply mode.

[0037] In one implementation, determining the target power supply mode according to the first total cost and the second total cost includes:

[0038] When the first total cost is less than or equal to the second total cost, taking the first power supply mode as the target power supply mode;

[0039] When the first total cost is greater than the second total cost, the second power supply mode is used as the target power supply mode.

[0040] In a second aspect, an embodiment of the present application provides a design device for a power supply system, including:

[0041] An acquisition module, used to acquire the user's electricity demand parameters, market price parameters and technical parameters of the power supply system; the power supply system includes a photovoltaic-wind power system, an inverter and an energy station, and the energy station includes an energy storage battery, an electrolyzer, a hydrogen storage module and a fuel cell;

[0042] A first determination module, used to determine the parameters to be designed according to the power demand parameters and the technical related parameters;

[0043] A second determination module, configured to determine a first total cost of the first power supply mode and a second total cost of the second power supply mode according to the parameters to be designed and the market price parameters;

[0044] a third determining module, configured to determine a target power supply mode according to the first total cost and the second total cost;

[0045] Among them, the first power supply mode is powered by photovoltaic-wind power and energy storage batteries, and the second power supply mode is powered by photovoltaic-wind power, energy storage batteries and hydrogen energy storage.

[0046] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a memory, wherein the memory stores instructions, and the instructions are loaded and executed by the processor to implement a method in any one of the above-mentioned embodiments.

[0047] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed, the method in any one of the above-mentioned embodiments is implemented.

[0048] The beneficial effects of the above technical solution include at least:

[0049] By obtaining the user's electricity demand parameters, market price parameters and technical parameters of the power supply system; the power supply system includes a photovoltaic-wind power system, an inverter and an energy station, and the energy station includes energy storage batteries, electrolyzers, hydrogen storage modules and fuel cells, according to the electricity demand parameters and technical parameters, the parameters to be designed are determined, according to the parameters to be designed and the market price parameters, the first total cost of the first power supply mode and the second total cost of the second power supply mode are determined, according to the first total cost and the second total cost, the target power supply mode is determined, which is conducive to determining a power supply mode that meets user needs and has lower costs, and optimizing the design effect of the power supply system.

[0050] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0052] Figure 1 A schematic diagram of a step flow of a design method for a power supply system according to an embodiment of the present application;

[0053] Figure 2 This is a block diagram of a power supply system according to an embodiment of the present application;

[0054] Figure 3 A structural block diagram of a design device for a power supply system according to an embodiment of the present application;

[0055] Figure 4 This is a structural block diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0056] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0057] Reference Figure 1 , a flow chart of a method for designing a power supply system according to an embodiment of the present application is shown. The method for designing a power supply system may at least include steps S100-S400:

[0058] S100: Obtain the user's electricity demand parameters, market price parameters, and technical parameters related to the power supply system.

[0059] like Figure 2As shown, the power supply system includes a photovoltaic-wind power system, an inverter and an energy station. The energy station includes a storage battery, an electrolyzer, a hydrogen storage module and a power generation module. In the embodiment of the present application, the power generation module is taken as a fuel cell as an example for explanation. The photovoltaic-wind power system (abbreviated as photovoltaic-wind power) can directly supply the user's power load through the electric energy of the inverter, and the electric energy can be stored in the energy station for standby. It should be noted that the power supply system can have three power supply modes. The first power supply mode is powered by photovoltaic-wind power and energy storage batteries. The energy storage batteries use the stored electricity to supply power, with fast response speed and high efficiency, and are suitable for short-cycle energy storage; the second power supply mode is powered by photovoltaic-wind power, energy storage batteries and hydrogen energy storage. In addition to energy storage batteries, when electricity needs to be converted into hydrogen storage, an electrolyzer is used to convert surplus electricity into hydrogen through water electrolysis technology and store it in a hydrogen storage module. When hydrogen needs to be released, the hydrogen storage module releases hydrogen for the fuel cell to convert hydrogen into electricity output for use by power loads; the third power supply mode is to only use photovoltaic-wind power for power supply, which has the highest efficiency, but generally cannot meet user needs. For example, when there is no light or wind, there is no electricity supply. Therefore, this application only considers the first two power supply modes. It should be noted that in the first power supply mode, the photovoltaic-wind power path is used first, followed by the energy storage battery path for power supply. In the second power supply mode, the photovoltaic-wind power path is used first, followed by the energy storage battery path, and finally hydrogen energy storage is used for power supply.

[0060] S200: Determine the parameters to be designed according to the power demand parameters and technical related parameters.

[0061] S300: Determine a first total cost of the first power supply mode and a second total cost of the second power supply mode according to the parameters to be designed and the market price parameters.

[0062] S400: Determine a target power supply mode according to the first total cost and the second total cost.

[0063] The design method of the power supply system in the embodiment of the present application can be executed by an electronic control unit, a controller, a processor, etc. of a terminal such as a computer, a mobile phone, a tablet, a vehicle-mounted terminal, etc., and can also be executed by a cloud server.

[0064] The technical solution of the embodiment of the present application obtains the user's electricity demand parameters, market price parameters and technical parameters related to the power supply system; the power supply system includes a photovoltaic-wind power system, an inverter and an energy station, and the energy station includes a storage battery, an electrolyzer, a hydrogen storage module and a fuel cell. According to the electricity demand parameters and the technical parameters, the parameters to be designed are determined, and according to the parameters to be designed and the market price parameters, the first total cost of the first power supply mode and the second total cost of the second power supply mode are determined. According to the first total cost and the second total cost, the target power supply mode is determined, which is conducive to determining a power supply mode that meets user needs and has lower costs, and optimizing the design effect of the power supply system.

[0065] In one embodiment, the power demand parameters can be set according to the user's power consumption and communication with the user, or obtained by using sensors to obtain corresponding data, including but not limited to the total annual power consumption E (in kWh) of the power load end, the maximum daily power consumption E of the power load end, and the power demand parameters of the power demand. d (in kWh), the maximum power demand of the load end P max (in kW), the number of energy storage days required by the user N (in days); technical related parameters can be provided by the supplier of the power supply system or obtained from the Internet search, including but not limited to the inverter conversion efficiency η1, the energy storage battery charging efficiency η2, the energy storage battery discharging efficiency η3, the electrolysis efficiency of the electrolyzer (electricity to hydrogen) η4, the hydrogen storage module charging and discharging efficiency η5, the fuel cell power generation efficiency (hydrogen to electricity) η6, the power generation of 1kg hydrogen e (in kWh), the 20-year life attenuation rate of photovoltaic-wind power β, the photovoltaic / wind power "annual utilization hours" H, which can be determined based on the corresponding geographical location and the official published historical data, and the maximum daily utilization hours h d_max The market price parameters are determined based on the actual market prices and include but are not limited to the unit price of energy storage batteries p1 (in yuan / kWh), the unit price of electrolyzers p2 (in yuan / kW), the unit price of hydrogen storage modules p3 (in yuan / kg H2), the unit price of fuel cells p4 (in yuan / kW), the unit price of photovoltaic-wind power systems p s (Unit: Yuan / kW).

[0066] Assuming that the total cost of the power supply system is C, in yuan, then:

[0067] C=P s ×p s +E1×p1+P2×p2+m×p3+P4×p4

[0068] It can be seen that the total cost of this power supply system is determined by the above parameters, because it is necessary to design and configure E1, P2, m, P4, P sTo achieve the optimal control of the total cost of the power supply system, the design parameters that need to be determined include but are not limited to: energy storage battery capacity E1 (in kWh), electrolyzer power P2 (in kW), hydrogen storage capacity of hydrogen storage module m (in kg), fuel cell power generation power P4 (in kW), photovoltaic-wind power system installed power P s (Unit: kW).

[0069] In one implementation, step S200 includes steps S210-S220:

[0070] S210. When the first power supply mode is used for power supply, determine the first difference between the preset value and the 20-year life attenuation rate of the photovoltaic-wind power system, determine the first product of the inverter conversion efficiency, the energy storage battery charging efficiency, the energy storage battery discharging efficiency, the annual utilization hours and the first difference, and determine the installed power of the photovoltaic-wind power system based on the first ratio of the total annual power consumption at the power load end to the first product.

[0071] Optionally, when the first power supply mode is used for power supply, the annual power generation of the photovoltaic system is:

[0072]

[0073] The corresponding installed power of the photovoltaic-wind power system is:

[0074]

[0075] Considering the design safety margin, the installed power of the photovoltaic system in this mode takes the upper limit value, because the final installed power of the photovoltaic-wind power system P s :

[0076]

[0077] Among them, taking the preset value of 1 as an example, the first difference is (1-β), the inverter conversion efficiency η1, the energy storage battery charging efficiency η2, the energy storage battery discharging efficiency η3, the annual utilization hours H and the first difference (1-β) are multiplied by: η1×η2×η3×H×(1-β), and the installed power P of the photovoltaic-wind power system is determined according to the first ratio of the total annual power consumption E of the power load end to the first product η1×η2×η3×H×(1-β). s .

[0078] S220. When the second power supply mode is used for power supply, determine the inverter conversion efficiency, the electrolysis efficiency of the electrolyzer, the charging and discharging efficiency of the hydrogen storage module, the fuel cell power generation efficiency, the second product of the annual utilization hours and the first difference, and determine the installed power of the photovoltaic-wind power system according to the second ratio of the total annual power consumption of the power load end to the second product.

[0079] Optionally, when the second power supply mode is used for power supply,

[0080] The annual power generation of the photovoltaic system is:

[0081]

[0082] The corresponding photovoltaic system installed power is:

[0083]

[0084] Considering the design safety margin, the installed power of the photovoltaic system in this mode takes the upper limit value, that is:

[0085]

[0086] Among them, the first difference is (1-β), the inverter conversion efficiency η1, the electrolysis efficiency of the electrolyzer (electricity to hydrogen) η4, the hydrogen storage module charging and discharging efficiency η5, the fuel cell power generation efficiency (hydrogen to electricity) η6, the annual utilization hours H and the second product of the first difference (1-β) are: η1×η4×η5×η6×H×(1-β). The installed power of the photovoltaic-wind power system is determined according to the second ratio of the total annual electricity consumption E at the power load end to the second product.

[0087] In one embodiment, step S200 further includes step S230 or S240, and the execution order of S230, S240 and step S210 is arbitrary:

[0088] S230, determining the third product of the installed power of the photovoltaic-wind power system and the daily maximum utilization hours, and determining the electrolyzer power according to a third ratio of the third product to 24.

[0089] Optionally, the electrolyzer power can be determined based on the maximum daily utilization hours. Specifically, in extreme cases, the maximum daily power generation of the photovoltaic-wind power system is the installed power P of the photovoltaic-wind power system. s The maximum number of hours per day d_max The third product P s ×h d_max , the user does not need electricity, and all the electricity generated must be converted into hydrogen for storage through the electrolyzer working 24 hours a day. Then the corresponding electrolyzer power P2 in this case is:

[0090]

[0091] It should be noted that since P2 designed by this method can cover the most extreme situation mentioned above, in most cases, the light / wind power is average, and the user end consumes the electricity generated by the photovoltaic-wind power system in real time when there is light / wind power. In this way, a large part of the electrolyzer power P2 is idle and wasted. Therefore, this method is relatively uneconomical when the price of the electrolyzer is high. The following second method is used in this application to determine the electrolyzer power P2.

[0092] S240, determining the fourth product of the installed power of the photovoltaic-wind power system and the annual utilization hours, and determining the fifth product of 24 and 360, and determining the power of the electrolyzer according to a fourth ratio of the fourth product to the fifth product.

[0093] Optionally, the electrolyzer power can be determined based on the daily average of the annual utilization hours H. Specifically, a year is calculated as 360 days, and the average daily photovoltaic / wind power generation is P s ×H / 360. In extreme cases, if the user does not use electricity on that day, all the electricity generated must be converted into hydrogen for storage through the electrolyzer working 24 hours a day. In this case, the corresponding electrolyzer power P2 is:

[0094]

[0095] In one embodiment, step S200 further includes steps S250-S270, and the execution order of S250, S240 and S210 is arbitrary:

[0096] S250: Determine that the power of the energy storage battery is greater than or equal to the value of the maximum power consumption of the power load end in a single day.

[0097] It should be noted that according to the technical characteristics of electrochemical energy storage and hydrogen energy storage, when users use electricity for a short period of time, energy storage batteries are mainly used, and the energy storage battery power E1 can at least guarantee the maximum daily power consumption E1 of the power load end. d demand, without starting hydrogen power generation. Therefore, it is determined that E1 ≥ E d , the upper limit of E1 is determined by the optimal total cost of the power supply system, thereby determining the specific value of the energy storage battery power E1.

[0098] S260, determine the fifth product of the maximum daily power consumption of the power load end and the user's energy storage days requirement, calculate the second difference between the fifth product and the power of the energy storage battery, and determine the hydrogen storage capacity of the hydrogen storage module based on the fifth ratio of the second difference and the power generation of 1kg of hydrogen.

[0099] Optionally, the electricity stored in the hydrogen storage module and the electricity stored in the energy storage battery constitute the total electricity storage demand of the user, so the electricity stored in the hydrogen storage module is: the maximum daily electricity consumption of the power load end E dThe second difference between the fifth product of the user's energy storage days requirement N and the energy storage battery power E1, that is, E d ×N-E1, and then determine the hydrogen storage capacity m of the hydrogen storage module according to the fifth ratio of the second difference and the power generation e of 1kg hydrogen:

[0100]

[0101] S270: Determine the power generated by the fuel cell as the maximum power demand of the power load end.

[0102] Optionally, if the energy storage battery has a low power level E1 and cannot provide power output, the fuel cell needs to generate power, and the fuel cell power generation power P4 must at least meet the maximum power demand P of the power load end. max , that is:

[0103] P4≥P max

[0104] From a cost perspective, this application takes:

[0105] P4=P max

[0106] In one embodiment, step S300 includes step S310 of determining a first total cost of the first power supply mode according to the parameters to be designed and the market price parameters, and step S320 of determining a second total cost of the second power supply mode according to the parameters to be designed and the market price parameters. Step S310 includes:

[0107] S310. Determine the sixth product of the installed power of the photovoltaic-wind power system and the unit price of the photovoltaic-wind power system when the first power supply mode is used for power supply; determine the seventh product of the energy storage battery power and the unit price of the energy storage battery; and determine the first total cost of the first power supply mode based on the sum of the sixth product and the seventh product.

[0108] Optionally, the installed power P of the photovoltaic-wind power system when the first power supply mode is used for power supply is determined. s Compared with the unit price of photovoltaic-wind power system s The sixth product P s ×p s , then determine the seventh product E1×p1 of the energy storage battery power E1 and the energy storage battery unit price p1; and determine the first total cost C1 of the first power supply mode according to the sum of the sixth product and the seventh product:

[0109] C1=P s ×p s +E1×p1

[0110]

[0111] Wherein, step S320 includes:

[0112] S320. Determine the eighth product of the installed power of the photovoltaic-wind power system and the unit price of the photovoltaic-wind power system when the second power supply mode is used for power supply; determine the ninth product of the energy storage battery power and the unit price of the energy storage battery; determine the tenth product of the installed power of the photovoltaic-wind power system, the electrolyzer power and the unit price of the electrolyzer when the second power supply mode is used for power supply; determine the eleventh product of the hydrogen storage capacity of the hydrogen storage module and the unit price of the hydrogen storage module; determine the twelfth product of the fuel cell power generation power and the unit price of the fuel cell; determine the sum of the eighth product, the ninth product, the tenth product, the eleventh product and the twelfth product to obtain the second total cost of the second power supply mode.

[0113] Optionally, the installed power P of the photovoltaic-wind power system when the second power supply mode is used for power supply is determined. s Compared with the unit price of photovoltaic-wind power system s The eighth product P s ×p s ; Determine the ninth product E1×p1 of the energy storage battery power E1 and the energy storage battery unit price p1; Determine the installed power P of the photovoltaic-wind power system when the second power supply mode is used for power supply s , the tenth product P of the electrolytic cell power P2 and the electrolytic cell unit price p2 s ×P2×p2; determine the eleventh product m×p3 of the hydrogen storage capacity m of the hydrogen storage module and the unit price p3 of the hydrogen storage module; determine the power generation power P of the fuel cell max (p4=P max ) and the twelfth product P of the fuel cell unit price p4 max ×p4; determine the sum of the eighth product, the ninth product, the tenth product, the eleventh product and the twelfth product to obtain the second total cost C2 of the second power supply mode:

[0114] C2=P s ×p s +E1×p1+P s ×P2×p2+m×p3+P max ×p4

[0115] In the present application embodiment, the electrolytic cell power For example,

[0116]

[0117] In one implementation, step S400 includes steps S410-S420:

[0118] S410: When the first total cost is less than or equal to the second total cost, use the first power supply mode as the target power supply mode.

[0119] Optionally, when the first total cost C1 is less than or equal to the second total cost C2, the first power supply mode is used as the target power supply mode, thereby saving costs on the basis of meeting the power demand of the user.

[0120] S420: When the first total cost is greater than the second total cost, use the second power supply mode as the target power supply mode.

[0121] Optionally, when the first total cost C1 is greater than the second total cost C2, the second power supply mode is used as the target power supply mode, thereby saving costs on the basis of meeting the power demand of the user.

[0122] The following is a specific example to illustrate that the total cost model of the power supply system can be used to evaluate which energy configuration power supply solution has more cost advantages, how to select the design solution, and how to configure the key design indicators according to the specific user situation, the price and parameters of related technical products, etc. The following typical case analysis is used to illustrate:

[0123] Case A——

[0124] Assume that a user is as follows:

[0125] The total annual electricity consumption E at the power load end is 72,000 kWh.

[0126] Maximum daily power consumption of the load side E d It is 600kWh.

[0127] The maximum power demand P of the load end max It is 40kW.

[0128] The user's energy storage requirement N is 14 days.

[0129] The unit price of energy storage battery p1 is 700 yuan / kWh.

[0130] The unit price of electrolytic cell p2 is 8,000 yuan / kW.

[0131] The unit price of hydrogen storage module p3 is 8,000 yuan / kgH2.

[0132] The unit price of fuel cell p4 is 5,000 yuan / kW.

[0133] Photovoltaic-wind power system unit price s It is 2,300 yuan / kW.

[0134] The inverter conversion efficiency η1 is 95%.

[0135] The energy storage battery charging efficiency η2 is 90%.

[0136] The energy storage battery discharge efficiency η3 is 95%.

[0137] The electrolysis efficiency (electricity to hydrogen) η4 of the electrolyzer is 75%.

[0138] The hydrogen storage module charging and discharging efficiency η5 is 99%.

[0139] The fuel cell power generation efficiency (hydrogen to electricity) η6 is 50%.

[0140] The electricity generation capacity of 1kg of hydrogen is 16.5kWh.

[0141] The 20-year lifetime decay rate β of photovoltaic-wind power is 20%.

[0142] The annual utilization hours of photovoltaic / wind power H is 1,400 hours.

[0143] Assuming that the first power supply mode is adopted, the first total cost C1 is: 6.062 million yuan.

[0144] Assuming that the second power supply mode is adopted, the second total cost C2 is: 5.0572 million yuan.

[0145] Therefore, in this case, the second power supply mode is more cost-effective for this power supply system. At this time, the key design indicators of this power supply system, that is, the parameters to be designed, are:

[0146] Energy storage battery capacity E1 = 600kWh.

[0147] Electrolytic cell power P2 = 29.53 kW.

[0148] The hydrogen storage capacity of the hydrogen storage module is m=472.73kg.

[0149] Fuel cell power generation P4 = 40 kW.

[0150] Installed power P of photovoltaic-wind power system s =182.27kW.

[0151] Case B——

[0152] Compared with Case A, only the user's energy storage days requirement N is changed from 14 days to 3 days, and everything else is the same as Case A.

[0153] Assuming that the first power supply mode is adopted, the first total cost C1 is: 1.442 million yuan.

[0154] Assuming that the second power supply mode is adopted, the second total cost C2 is: 1.8572 million yuan.

[0155] Therefore, in this case, the first power supply mode has more cost advantages. At this time, the key design indicators of the power supply system, that is, the parameters to be designed, are:

[0156] Energy storage battery capacity E1 = 1800kWh.

[0157] Installed power P of photovoltaic-wind power system s =79.15kW.

[0158] Case C——

[0159] Compared with Case A, only the unit price of the energy storage battery p1 changes from 700 yuan / kWh to 400 yuan / kWh, and everything else is the same as Case A.

[0160] Assuming that the first power supply mode is adopted, the first total cost C1 is: 3.542 million yuan.

[0161] Assuming that the second power supply mode is adopted, the second total cost C2 is: 4.8772 million yuan.

[0162] Therefore, in this case, the first power supply mode has more cost advantages. At this time, the key design indicators of the power supply system, that is, the parameters to be designed, are:

[0163] Energy storage battery capacity E1 = 8400kWh.

[0164] Installed power P of photovoltaic-wind power system s =79.15kW.

[0165] Through the method of the embodiment of the present application, a reliable design method for an off-grid power supply system is proposed, which can achieve optimized control of the investment cost of the off-grid power supply system, selection of design schemes and configuration of key design parameters, which is conducive to cost savings.

[0166] Reference Figure 3 , shows a structural block diagram of a design device for a power supply system according to an embodiment of the present application, and the device may include:

[0167] An acquisition module is used to obtain the user's electricity demand parameters, market price parameters and technical parameters of the power supply system; the power supply system includes a photovoltaic-wind power system, an inverter and an energy station, and the energy station includes an energy storage battery, an electrolyzer, a hydrogen storage module and a fuel cell;

[0168] The first determination module is used to determine the parameters to be designed according to the power demand parameters and technical related parameters;

[0169] A second determination module, used to determine a first total cost of the first power supply mode and a second total cost of the second power supply mode according to the parameters to be designed and the market price parameters;

[0170] A third determination module, configured to determine a target power supply mode according to the first total cost and the second total cost;

[0171] Among them, the first power supply mode is powered by photovoltaic-wind power and energy storage batteries, and the second power supply mode is powered by photovoltaic-wind power, energy storage batteries and hydrogen energy storage.

[0172] The functions of each module in each device in the embodiments of the present application can be found in the corresponding description in the above method, and will not be repeated here.

[0173] Reference Figure 4 , shows a structural block diagram of an electronic device according to an embodiment of the present application, the electronic device includes: a memory 310 and a processor 320, the memory 310 stores instructions that can be run on the processor 320, and the processor 320 loads and executes the instructions to implement the design method of the power supply system in the above embodiment. The number of the memory 310 and the processor 320 can be one or more.

[0174] In one embodiment, the electronic device also includes a communication interface 330 for communicating with external devices and performing data exchange transmission. If the memory 310, the processor 320 and the communication interface 330 are implemented independently, the memory 310, the processor 320 and the communication interface 330 can be interconnected through a bus and complete mutual communication. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0175] Optionally, in a specific implementation, if the memory 310, the processor 320 and the communication interface 330 are integrated on a chip, the memory 310, the processor 320 and the communication interface 330 can communicate with each other through an internal interface.

[0176] An embodiment of the present application provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the design method of the power supply system provided in the above embodiment.

[0177] An embodiment of the present application also provides a chip, which includes a processor for calling and executing instructions stored in the memory from the memory, so that a communication device equipped with the chip executes the method provided by the embodiment of the present application.

[0178] An embodiment of the present application also provides a chip, including: an input interface, an output interface, a processor and a memory, wherein the input interface, the output interface, the processor and the memory are connected via an internal connection path, and the processor is used to execute the code in the memory. When the code is executed, the processor is used to execute the method provided in the embodiment of the application.

[0179] It should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. It is worth noting that the processor may be a processor supporting the advanced RISC machines (ARM) architecture.

[0180] Further, optionally, the above-mentioned memory may include a read-only memory and a random access memory, and may also include a non-volatile random access memory. The memory may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may include a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may include a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available. For example, static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct rambus RAM (DR RAM).

[0181] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.

[0182] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0183] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0184] Any process or method description in the flow chart or otherwise described herein can be understood to represent a module, fragment or portion of a code including one or more executable instructions for implementing the steps of a specific logical function or process. And the scope of the preferred embodiment of the present application includes other implementations, in which the functions may not be performed in the order shown or discussed, including in a substantially simultaneous manner or in a reverse order according to the functions involved.

[0185] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, which can be embodied in any computer-readable medium for use by an instruction execution system, apparatus or device (such as a computer-based system, a system including a processor or other system that can fetch instructions from an instruction execution system, apparatus or device and execute instructions), or used in combination with these instruction execution systems, apparatuses or devices.

[0186] It should be understood that the various parts of the present application can be implemented with hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented with software or firmware stored in a memory and executed by a suitable instruction execution system. All or part of the steps of the above embodiment method can be completed by instructing the relevant hardware through a program, which can be stored in a computer-readable storage medium, and when the program is executed, it includes one of the steps of the method embodiment or a combination thereof.

[0187] In addition, each functional unit in each embodiment of the present application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into one module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of a software functional module. If the above-mentioned integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. The storage medium can be a read-only memory, a disk or an optical disk, etc.

[0188] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A design method for a power supply system, characterized in that: include: Obtain the user's electricity demand parameters, market price parameters and technical parameters related to the power supply system; The power supply system includes a photovoltaic-wind power system, an inverter and an energy station, and the energy station includes an energy storage battery, an electrolyzer, a hydrogen storage module and a fuel cell; Determining the parameters to be designed according to the power demand parameters and the technical related parameters; Determining a first total cost of a first power supply mode and a second total cost of a second power supply mode according to the parameters to be designed and the market price parameters; determining a target power supply mode according to the first total cost and the second total cost; Among them, the first power supply mode is powered by photovoltaic-wind power and energy storage batteries, and the second power supply mode is powered by photovoltaic-wind power, energy storage batteries and hydrogen energy storage.

2. The design method of the power supply system according to claim 1, characterized in that: The power demand parameters include the total annual power consumption of the power load end, the technical related parameters include the inverter conversion efficiency, the energy storage battery charging efficiency, the energy storage battery discharging efficiency, the annual utilization hours and the 20-year life attenuation rate of the photovoltaic-wind power system, and the parameters to be designed include the installed power of the photovoltaic-wind power system; Determining the parameters to be designed according to the power demand parameters and the technical related parameters includes: When the first power supply mode is used for power supply, a first difference between a preset value and a 20-year life attenuation rate of the photovoltaic-wind power system is determined, and a first product of the inverter conversion efficiency, the energy storage battery charging efficiency, the energy storage battery discharging efficiency, the annual utilization hours and the first difference is determined; and the installed power of the photovoltaic-wind power system is determined according to a first ratio of the total annual power consumption of the power load end to the first product; When the second power supply mode is used for power supply, the inverter conversion efficiency, the electrolysis efficiency of the electrolyzer, the charging and discharging efficiency of the hydrogen storage module, the fuel cell power generation efficiency, the second product of the annual utilization hours and the first difference are determined, and the installed power of the photovoltaic-wind power system is determined based on the second ratio of the total annual electricity consumption at the power load end to the second product.

3. The design method of the power supply system according to claim 2, characterized in that: The technical related parameters also include the maximum daily utilization hours, and the parameters to be designed also include the electrolytic cell power; The determining of the parameters to be designed according to the power demand parameters and the technical related parameters further comprises: Determine the third product of the installed power of the photovoltaic-wind power system and the maximum daily utilization hours, and determine the power of the electrolyzer according to a third ratio of the third product to 24; or, Determine the fourth product of the installed power of the photovoltaic-wind power system and the annual utilization hours, and determine the fifth product of 24 and 360. Determine the power of the electrolyzer based on the fourth ratio of the fourth product to the fifth product.

4. The design method of the power supply system according to claim 3, characterized in that: The power demand parameters also include the maximum daily power consumption of the power load end, the user's energy storage days requirement and the maximum power demand of the power load end. The technical related parameters include the power generation of 1kg hydrogen. The parameters to be designed include the power of the energy storage battery, the hydrogen storage capacity of the hydrogen storage module and the power generation power of the fuel cell. The determining of the parameters to be designed according to the power demand parameters and the technical related parameters further comprises: Determine that the power of the energy storage battery is greater than or equal to the maximum power consumption of the power load in a single day; Determine the fifth product of the maximum daily power consumption of the power load end and the number of energy storage days required by the user, calculate the second difference between the fifth product and the power of the energy storage battery, and determine the hydrogen storage capacity of the hydrogen storage module according to the fifth ratio of the second difference and the power generation of 1kg of hydrogen; The fuel cell power generation is determined as the maximum power demand of the power load end.

5. The design method of the power supply system according to claim 4, characterized in that: The market price parameters include the unit price of photovoltaic-wind power systems and the unit price of energy storage batteries; Determining a first total cost of the first power supply mode according to the parameters to be designed and the market price parameters includes: Determine a sixth product of the installed power of the photovoltaic-wind power system and the unit price of the photovoltaic-wind power system when power is supplied using the first power supply mode; Determine the seventh product of the energy storage battery capacity and the unit price of the energy storage battery; A first total cost of the first power supply mode is determined according to the sum of the sixth product and the seventh product.

6. The design method of the power supply system according to claim 4, characterized in that: The market price parameters also include the unit price of electrolyzer, the unit price of hydrogen storage module and the unit price of fuel cell; Determining the second total cost of the second power supply mode according to the parameters to be designed and the market price parameters includes: Determine an eighth product of the installed power of the photovoltaic-wind power system and the unit price of the photovoltaic-wind power system when power is supplied using the second power supply mode; Determine the ninth product of the energy storage battery capacity and the unit price of the energy storage battery; Determine the tenth product of the installed power of the photovoltaic-wind power system, the power of the electrolyzer, and the unit price of the electrolyzer when power is supplied using the second power supply mode; Determine the eleventh product of the hydrogen storage capacity of the hydrogen storage module and the unit price of the hydrogen storage module; Determine the twelfth product of the power generated by the fuel cell and the unit price of the fuel cell; The sum of the eighth product, the ninth product, the tenth product, the eleventh product and the twelfth product is determined to obtain a second total cost of the second power supply mode.

7. The method for designing a power supply system according to any one of claims 1 to 6, characterized in that: The determining the target power supply mode according to the first total cost and the second total cost includes: When the first total cost is less than or equal to the second total cost, taking the first power supply mode as the target power supply mode; When the first total cost is greater than the second total cost, the second power supply mode is used as the target power supply mode.

8. A design device for a power supply system, characterized in that: include: An acquisition module is used to obtain the user's power demand parameters, market price parameters and technical parameters related to the power supply system; The power supply system includes a photovoltaic-wind power system, an inverter and an energy station, and the energy station includes an energy storage battery, an electrolyzer, a hydrogen storage module and a fuel cell; A first determination module, used to determine the parameters to be designed according to the power demand parameters and the technical related parameters; A second determination module, configured to determine a first total cost of the first power supply mode and a second total cost of the second power supply mode according to the parameters to be designed and the market price parameters; a third determining module, configured to determine a target power supply mode according to the first total cost and the second total cost; Among them, the first power supply mode is powered by photovoltaic-wind power and energy storage batteries, and the second power supply mode is powered by photovoltaic-wind power, energy storage batteries and hydrogen energy storage.

9. An electronic device, characterized in that: include: A processor and a memory, wherein the memory stores instructions, and the instructions are loaded and executed by the processor to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method according to any one of claims 1 to 7 is implemented.

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