Control Method and Related Products of Household Photovoltaic Energy Storage System

Abstract

The present invention provides a household optical energy storage system and related products. The control method of the household optical energy storage system includes: collecting the measurement data of the electric energy metering device, the power of the energy storage battery, and the electricity price information; determining the difference between the power generation power of the microgrid power generation device and the load power of the electrical equipment according to the measurement data to obtain the power difference; obtaining a pre-configured energy regulation model, and using the power difference, the power of the energy storage battery, and the electricity price information to perform matching in the energy regulation model to determine the charging and discharging strategy of the energy storage battery and the operation adjustment strategy of the electrical equipment; using the power conversion device to execute the charging and discharging strategy and sending an adjustment instruction corresponding to the operation adjustment strategy to the electrical equipment. This solution intelligently determines the charging and discharging strategy of the energy storage battery and the operation adjustment strategy of the electrical equipment, realizes simple and efficient coordination of the work of the electrical equipment, enables the coordination of power generation, power storage, and power consumption, and forms a good household energy coordination mechanism.

Description

Technical Field

[0001] The present invention relates to energy storage technologies, and particularly to a control method and related products for a household photovoltaic energy storage system. Background Art

[0002] With the development of society and the progress of technology, new energy technologies have attracted increasing attention. In the context of rising household energy costs, more and more households have started to install energy storage devices such as photovoltaic power generation and energy storage batteries.

[0003] Due to the characteristics of photovoltaic power generation (generating electricity during the day and not at night; high power generation at noon, low or no power generation in the morning and evening), the power generation power curve cannot match the power curve of the electrical load. As a result, excessive photovoltaic power generation at noon cannot be consumed, leading to the phenomenon of curtailment of light; at the same time, there is no sufficient new energy available during the peak evening electricity consumption period.

[0004] Introducing energy storage devices in the household electricity consumption scenario partially solves the problem of mismatch between photovoltaic power generation and user load electricity consumption (the battery can be charged when there is surplus power generation at noon, and the battery can be discharged when there is no photovoltaic power at night), which can improve the self-use rate of photovoltaic power generation, but there is still room for improvement in the energy utilization rate. Summary of the Invention

[0005] One objective of the present invention is to improve the electrical energy utilization efficiency of a household photovoltaic energy storage system.

[0006] A further objective of the present invention is to simply and efficiently coordinate the operation of electrical devices, enabling power generation, power storage, and power consumption to cooperate and form a household energy coordination mechanism.

[0007] Another further objective of the present invention is to optimize the energy regulation model to meet the comprehensive requirements of economic benefits, battery performance, user needs, and grid impact.

[0008] Specifically, the present invention provides a control method for a household photovoltaic energy storage system. The household photovoltaic energy storage system includes: a microgrid power generation device, an energy storage battery, a power conversion device, electrical devices, and an electrical energy metering device. And the household photovoltaic energy storage control method includes:

[0009] Collecting the metering data of the electrical energy metering device, the battery level of the energy storage battery, and the electricity price information;

[0010] Determining the difference between the power generation power of the microgrid power generation device and the load power of the electrical devices according to the metering data to obtain a power difference;

[0011] Obtaining a pre-configured energy regulation model,

[0012] Match the power difference, the power level of the energy storage battery, and the electricity price information in the energy regulation model to determine the charging and discharging strategy of the energy storage battery and the operation adjustment strategy of the electrical equipment;

[0013] Execute the charging and discharging strategy using the power conversion device and send an adjustment instruction corresponding to the operation adjustment strategy to the electrical equipment.

[0014] Optionally, the energy regulation model is configured to have three information dimensions of power difference, the power level of the energy storage battery, and electricity price information, and multiple strategy matching regions are set according to the three information dimensions. Each strategy matching region corresponds to a charging and discharging strategy and / or an operation adjustment strategy, and

[0015] The steps of matching the power difference, the power level of the energy storage battery, and the electricity price information in the energy regulation model include:

[0016] Find the strategy matching region in the energy regulation model where the power difference, the power level of the energy storage battery, and the electricity price information fall, and obtain the target region;

[0017] Retrieve the charging and discharging strategy and / or the operation adjustment strategy corresponding to the target region.

[0018] Optionally, the strategy matching region includes: a load reduction region; the load reduction region is set such that the power difference is within the first power threshold range, the power level of the energy storage battery is within the first power level threshold range, and the electricity price is the peak electricity price;

[0019] The operation adjustment strategy and the charging and discharging strategy corresponding to the load reduction region are: turn off at least some of the electrical equipment.

[0020] Optionally, the strategy matching region includes: an energy-saving region, and the energy-saving region is set such that the power difference is within the second power threshold range, the power level of the energy storage battery is within the second power level threshold range, and the electricity price is the peak electricity price;

[0021] The operation adjustment strategy and the charging and discharging strategy corresponding to the energy-saving region are: adjust at least some of the electrical equipment to the energy-saving mode and charge the energy storage battery using the power generation power of the microgrid power generation device.

[0022] Optionally, the strategy matching region includes: a consumption region;

[0023] In the consumption region, the power difference is within the third power threshold range, and the power level of the energy storage battery is within the third power level threshold range;

[0024] The operation adjustment strategy corresponding to the consumption region is: adjust at least some of the electrical equipment to the high-performance mode.

[0025] Optionally, the strategy matching region includes: a reserve mode region;

[0026] In the reserve mode region, the power difference is within the fourth power threshold range, and the charge level of the energy storage battery is within the fourth charge level threshold range;

[0027] The operation adjustment strategy corresponding to the reserve mode region is: start some of the turned-off electrical appliances.

[0028] Optionally, the step of sending an adjustment instruction corresponding to the operation adjustment strategy to the electrical appliances includes:

[0029] Convert the operation adjustment strategy into a switch signal according to a pre-configured switch coding method;

[0030] Output the switch signal through a switch output interface as the adjustment instruction.

[0031] Optionally, the electricity price information includes the time-sharing periods of the electricity price and the electricity consumption rate for each time-sharing period, and after converting the operation adjustment strategy into a switch signal according to the pre-configured switch coding method, it further includes:

[0032] Convert the electricity consumption rate into a switch signal and output it together with the switch signal obtained by converting the operation adjustment strategy.

[0033] Optionally, the above control method for a household photovoltaic energy storage system further includes:

[0034] Obtain the historical data of the metering data;

[0035] Analyze the historical data to predict the usage of the energy storage battery in the next operation cycle;

[0036] Perform charge and discharge operations on the energy storage battery in advance according to the usage.

[0037] According to another aspect of the present invention, there is also provided a control device for a household photovoltaic energy storage system, which includes a processor and a memory. A computer program is stored on the memory, and when the computer program is executed by the processor, the steps of any one of the above control methods for a household photovoltaic energy storage system are performed.

[0038] According to another aspect of the present invention, there is also provided a computer program product, including a computer program, and when the computer program is executed by the processor, the steps of any one of the above control methods for a household photovoltaic energy storage system are implemented.

[0039] The control method of the household optical energy storage system of the present invention collects the measurement data of the electric energy metering device, the power of the energy storage battery, and the electricity price information, determines the power difference between power generation and power consumption, and uses the power difference, the power of the energy storage battery, and the electricity price information to perform matching in the energy regulation model to determine the charging and discharging strategy of the energy storage battery and the operation adjustment strategy of the electrical equipment, so as to simply and efficiently coordinate the work of the electrical equipment, make power generation, power storage, and power consumption cooperate with each other, form a household energy coordination mechanism, and improve the electrical energy utilization efficiency of the household optical energy storage system.

[0040] Further, the control method of the household optical energy storage system of the present invention uses the power difference, the power of the energy storage battery, and the electricity price information to perform matching in the pre-configured energy regulation model to determine the charging and discharging strategy of the energy storage battery and the operation adjustment strategy of the electrical equipment; the power conversion device is used to execute the charging and discharging strategy and send an adjustment instruction corresponding to the operation adjustment strategy to the electrical equipment. The energy regulation model is configured with three information dimensions of power difference, power of the energy storage battery, and electricity price information. By optimizing the energy regulation model, the comprehensive requirements of economic benefits, battery performance, user needs, and grid impact are met.

[0041] Even further, in the control method of the household optical energy storage system of the present invention, the energy regulation model is configured with a load reduction area, an energy saving area, a consumption area, and a reserve mode area. Each mode area is respectively configured with the corresponding charging and discharging strategy of the energy storage battery and the operation adjustment strategy of the electrical equipment, and the control is flexible.

[0042] Based on the following detailed description of the specific embodiments of the present invention in conjunction with the drawings, those skilled in the art will more clearly understand the above and other objects, advantages, and features of the present invention. Description of the Drawings

[0043] Hereinafter, some specific embodiments of the present invention will be described in detail with reference to the drawings in an exemplary but non-limiting manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0044] Figure 1 is a schematic diagram of the component connection of the household optical energy storage system according to an embodiment of the present invention;

[0045] Figure 2 is a schematic diagram of summarizing the microgrid power generation device and the electrical load curve by the control device of the household optical energy storage system according to an embodiment of the present invention;

[0046] Figure 3 is a schematic diagram of the control method of the household optical energy storage system according to an embodiment of the present invention;

[0047] Figure 4 Schematic diagram of an energy regulation model used in a control method for a household optical energy storage system according to an embodiment of the present invention

[0048] Figure 5 Schematic diagram of sending instructions to an electrical device using a switching signal in a control method for a household optical energy storage system according to an embodiment of the present invention

[0049] Figure 6 Schematic diagram of a computer program product according to an embodiment of the present invention;

[0050] Figure 7 Schematic diagram of a computer-readable storage medium according to an embodiment of the present invention;

[0051] Figure 8 Schematic diagram of a control device according to an embodiment of the present invention. Detailed implementation manners

[0052] An embodiment of the present invention provides a control method for a household optical energy storage system, which calls the operation of an electrical device to make power generation, power storage, and power consumption cooperate with each other to form a coordinated state of the household energy mechanism.

[0053] Figure 1 Schematic diagram of the component connection of a household optical energy storage system according to an embodiment of the present invention. This household optical energy storage system generally includes a microgrid power generation device 170, an energy storage battery 180, an electric energy metering device 110, a power conversion device 160, an electrical device 190, and a control device 161.

[0054] Among the above components, the microgrid power generation device 170 can be a solar photovoltaic panel, which is used to be arranged in the illuminated area within a household and generate electric energy by using light. The microgrid power generation device 170 can generally be arranged in areas such as balconies and rooftops to convert electric energy using sunlight irradiation.

[0055] The energy storage battery 180 is used to store and release electric energy. The energy storage battery 180 can select types such as lithium-ion batteries, lead-acid batteries, sodium-sulfur batteries, nickel-metal hydride batteries, zinc-based batteries, and supercapacitors, and it is required to have: (1) a perfect protection mechanism, including overcharge, over-discharge, over-temperature protection, etc., to ensure the safe operation of the battery under various working conditions and avoid safety hazards such as fires and explosions; (2) a long cycle life, that is, it can be charged and discharged multiple times within a certain period without seriously affecting the battery capacity, and after a large number of cycles, the battery capacity can still be maintained at a certain ratio; (3) a wide working temperature range and can work normally within a wide temperature range such as -10°C to +45°C. Through the above conditions, the energy storage battery 180 can meet the requirements of households.

[0056] The electric energy metering device 110 can be set on the incoming line 120 of the power grid 200 and is used to measure the electric energy on the incoming line 120. The electric energy metering device 110 can use a smart meter or a similar metering device. The smart meter can perform data interaction with the control device 161 of the household optical energy storage system through wireless, wired, or power line carrier means, and provide corresponding metering data to the control device 161 of the household optical energy storage system.

[0057] The control device 161 can determine the difference between the power generation power of the microgrid power generation device 170 and the load power of the electrical equipment 190 based on the metering data, and obtain the power difference. For example, if the power generation power of the microgrid power generation device 170 is greater than the power of the household electrical equipment 190, the power difference is positive, and the electric energy flows to the power grid 200; while if the power generation power of the microgrid power generation device 170 is less than the power of the household electrical equipment, the power difference is negative, and the power grid 200 supplies power to the interior of the household.

[0058] The power conversion device 160 can use a micro-inverter, which is used to convert the direct current (DC) of the microgrid power generation device 170 and the energy storage battery 180 into alternating current (AC), and convert the alternating current (AC) provided by the power grid 200 into direct current (DC) for charging the energy storage battery 180. The power conversion device 160 is controlled by the control device 161 of the household optical energy storage system to complete power conversion. The control device 161 applies energy scheduling and control technology to comprehensively evaluate photovoltaic power generation, energy storage and power storage, and load power consumption data, and performs energy optimization scheduling.

[0059] Figure 2 It is a schematic diagram summarizing the microgrid power generation device 170 and the electrical load curve by the control device 161 of the household optical energy storage system according to an embodiment of the present invention. Due to the characteristics of photovoltaic power generation (generating electricity during the day and not generating electricity at night; high power generation at noon, low or no power generation in the early morning and evening), the power generation power curve L1 cannot match the electrical load power curve L2. Excessive photovoltaic power generation at noon cannot be consumed, resulting in the phenomenon of abandoned light; at the same time, there is not enough electric energy available during the peak electricity consumption at night. Introducing energy storage devices in the household new energy scenario partially solves the problem of mismatch between photovoltaic power generation and user load power consumption (when there is surplus power generation at noon, the battery can be started for charging, and when there is no photovoltaic power at night, the battery can be started for discharging), and can increase the self-use rate of photovoltaic power generation to more than 90%, but there is still room for improvement in the utilization rate of new energy. The control device 161 of this embodiment further improves the energy utilization efficiency by optimizing and adjusting the algorithm to coordinate the linkage mechanism of photovoltaic power generation, energy storage charging and discharging, and load power consumption.

[0060] The control device 161 is also communicatively connected to the electrical devices 190 within the home (electrical devices with relatively high power, such as heat storage devices like water heaters, air conditioners, heaters, etc.). It can send status adjustment instructions to the electrical devices 190 within the home. The control device 161 and the electrical devices 190 can communicate wirelessly or wiredly. In some embodiments, the control device 161 also transmits signals through switch signals, solving the problem of coordinated control between the photovoltaic energy storage system and electrical devices in the prior art (such as home appliances like heat pumps and water heaters of different brands. Although they are currently intelligent IoT devices, their control methods are inconsistent and there are significant differences in control protocols).

[0061] Figure 3 FIG. is a schematic diagram of a control method for a household photovoltaic energy storage system according to an embodiment of the present invention. Generally, the control method for the household photovoltaic energy storage system may include:

[0062] Step S301, collect the measurement data of the power metering device, the power of the energy storage battery, and the electricity price information. The measurement data can be from a smart meter. The state of charge (SOC) of the energy storage battery represents the ratio of the current remaining energy of the battery to its fully charged energy (i.e., the rated capacity) in percentage form. Under the time-of-use electricity price system, the electricity price is usually divided according to the peak and off-peak periods of electricity demand. For example, a day is divided into peak periods, flat peak periods, and off-peak periods. The electricity price in peak periods is higher, and the electricity price in off-peak periods is lower.

[0063] Step S302, determine the difference between the power generation power of the microgrid power generation device and the load power of the electrical device according to the measurement data to obtain the power difference. If the power generation power of the microgrid power generation device is greater than the power of the household electrical device, the power difference is positive, and the electric energy flows to the power grid; if the power generation power of the microgrid power generation device is less than the power of the household electrical device, the power difference is negative, and the power grid supplies power to the interior of the home.

[0064] Step S303, obtain the pre-configured energy regulation model.

[0065] Step S304, use the power difference, the power of the energy storage battery, and the electricity price information to match in the energy regulation model to determine the charge and discharge strategy of the energy storage battery and the operation adjustment strategy of the electrical device;

[0066] Step S305, use the power conversion device to execute the charge and discharge strategy and send an adjustment instruction corresponding to the operation adjustment strategy to the electrical device. The charge and discharge strategy stipulates the conditions for charging and discharging the energy storage battery; the operation adjustment strategy is used to indicate the start and stop of the electrical device and adjust the operation mode.

[0067] This method collects the metering data of the power metering device, the power of the energy storage battery, and the electricity price information, determines the power difference between power generation and power consumption, and uses the power difference, the power of the energy storage battery, and the electricity price information to perform matching in the energy regulation model to determine the charging and discharging strategy of the energy storage battery and the operation adjustment strategy of the electrical equipment, so as to simply and efficiently coordinate the work of the electrical equipment, make power generation, power storage, and power consumption cooperate with each other, form a household energy coordination mechanism, and improve the power utilization efficiency of the household photovoltaic energy storage system.

[0068] The process of collecting electricity price information generally may include: collecting the messages issued by the power grid operating agency; the messages issued by the power grid operating agency may include but are not limited to the price documents, dispatching instructions, contracts or agreements, software platform announcements, etc. issued by the power grid agency. For example, data crawling tools can be used to obtain data from multiple data sources, and the obtained information can be sorted out and converted into a unified text format for subsequent matching and information extraction. The existing electricity price acquisition methods cannot process messages with high real-time performance such as dispatching instructions, which is likely to cause losses. Use the preset electricity price keywords to perform matching in the message to determine whether there is electricity price information applicable to the energy storage system. The electricity price keywords can be generated according to the word segmentation results of relevant information, and keywords can be manually marked when necessary. The matched electricity price information needs to be subjected to applicability detection to ensure that the corresponding electricity price is for this energy storage system. If it is determined that there is electricity price information, extract the electricity price information from the message. Using the above process, the electricity price information of the energy storage system can be automatically obtained, and the charging and discharging strategy can be adjusted in a timely manner according to the electricity price information to meet the requirements of adjusting the operation mode.

[0069] In some embodiments, the energy regulation model is configured to have three information dimensions of power difference, the power of the energy storage battery, and electricity price information. Multiple strategy matching regions are respectively set according to the three information dimensions, and each strategy matching region corresponds to a charging and discharging strategy and / or an operation adjustment strategy. By optimizing the energy regulation model, the comprehensive requirements of economic benefits, battery performance, user needs, and grid impact are met. The step of using the power difference, the power of the energy storage battery, and the electricity price information to perform matching in the energy regulation model may include: searching in the energy regulation model for the strategy matching region where the power difference, the power of the energy storage battery, and the electricity price information fall, to obtain the target region; retrieving the charging and discharging strategy and / or the operation adjustment strategy corresponding to the target region.

[0070] Figure 4 It is a schematic diagram of the energy regulation model used in the control method of the household photovoltaic energy storage system according to an embodiment of the present invention. The energy regulation model is configured with a load reduction region S1, an energy saving region S2, a consumption region S3, and a reserve mode region S4. Each mode region is respectively configured with the corresponding charging and discharging strategy of the energy storage battery and the operation adjustment strategy of the electrical equipment, and the control is flexible.

[0071] The load reduction area S1 is set such that the power difference is within the first power threshold range, the power level of the energy storage battery is within the first power level threshold range, and the electricity price is the peak electricity price. The corresponding operation adjustment strategy and charge / discharge strategy for the load reduction area are: turn off at least some of the electrical equipment. That is, in the case of the load reduction area S1, there is a very small amount of surplus power from solar power generation, and the remaining power level of the battery is also low (less than 20%). At this time, the battery is preferentially charged, and the electrical equipment is notified that the power generation is insufficient, and it is recommended to stop operating high-power electrical equipment.

[0072] The energy-saving area S2 is set such that the power difference is within the second power threshold range, the power level of the energy storage battery is within the second power level threshold range, and the electricity price is the peak electricity price. The corresponding operation adjustment strategy and charge / discharge strategy for the energy-saving area S2 are: adjust at least some of the electrical equipment to the energy-saving mode, and charge the energy storage battery using the power generation of the microgrid power generation device. That is, in the case of the energy-saving area S2, there is surplus power from solar power generation, and the power level of the energy storage battery is still low (for example, less than 50%). At this time, the battery is also preferentially charged, and the electrical equipment is notified that it can operate in the energy-saving and economic mode.

[0073] The power consumption area S3 is set such that the power difference is within the third power threshold range, and the power level of the energy storage battery is within the third power level threshold range. The corresponding operation adjustment strategy for the power consumption area is: adjust at least some of the electrical equipment to the high-performance mode. That is, in the power consumption area S3, there is a large amount of surplus power from solar power generation, and the remaining power level of the energy storage battery is high (for example, more than 60%). At this time, it is recommended that high-power equipment such as heat pumps and water heaters operate in the high-performance mode, consuming relatively more electrical energy to consume the remaining photovoltaic power.

[0074] The reserve mode area S4 is configured such that the power difference is within the fourth power threshold range, and the power level of the energy storage battery is within the fourth power level threshold range; the corresponding operation adjustment strategy for the reserve mode area is: start some of the turned-off electrical equipment. In the case of the reserve mode area S4, the photovoltaic power generation is excessive, and the battery is almost full. At this time, it is strongly recommended that heat pumps and water heaters start the heat storage mode to consume the excessive photovoltaic power.

[0075] The inventor first proposed the above three-dimensional energy regulation model in the field of electrical energy storage, timely and reliably adjusting the charge / discharge strategy of the energy storage battery, and guiding the electrical equipment to change the operation adjustment strategy. Each area of the energy regulation model is correspondingly set with the operation adjustment strategy. When it is necessary to adjust the energy regulation model, the corresponding values of each area can be adjusted accordingly, without having to re-establish the corresponding relationship.

[0076] In areas where time-of-use electricity prices are enabled, the system dynamically optimizes and makes decisions on charging and the operation control of household appliance loads in combination with peak and valley electricity price periods, as well as the user's choice of energy-efficient and comfortable energy use. For example, during valley electricity price periods, when photovoltaic power generation is insufficient due to weather reasons, grid charging and the operation of household appliance loads such as heat pumps and water heaters can be started.

[0077] Regarding the problem that it is difficult to unify the control methods for different brands of household appliance loads (mainly heat pumps and water heaters), this embodiment also provides an instruction for sending the above-mentioned operation adjustment strategy to electrical equipment through the output of switch signals. For example, the steps of sending an adjustment instruction corresponding to the operation adjustment strategy to the electrical equipment may include: converting the operation adjustment strategy into a switch signal according to a pre-configured switch coding method; outputting the switch signal through a switch output interface as an adjustment instruction.

[0078] In the case of time-of-use electricity prices, the electricity price information includes the time-of-use periods of the electricity price and the electricity consumption rate for each time-of-use period, and after converting the operation adjustment strategy into a switch signal according to the pre-configured switch coding method, it further includes: converting the electricity consumption rate into a switch signal and outputting it together with the switch signal obtained by converting the operation adjustment strategy.

[0079] Figure 5 It is a schematic diagram of using switch signals to send instructions to electrical equipment in the control method of a household optical energy storage system according to an embodiment of the present invention. The control device of the household optical energy storage system has multiple digital output interfaces K1, K2, K3, and other communication interfaces P1, P2. The number of digital output interfaces and other communication interfaces can be set according to needs, and the numbers in the figure are only for illustration. Among them, the communication interfaces P1, P2 can be wireless communication connection interfaces such as LoRa, LAN, or wired connection interfaces such as RS485 for connecting electrical equipment, smart meters, etc. with the same communication protocol.

[0080] The switch signal output notifies the electrical equipment of the recommended operation adjustment strategy through the combination of switch signals. Table 1 is the corresponding table of the meanings of the switch signal output.

[0081] Table 1

[0082]

[0083]

[0084] The above corresponding table is for illustrative purposes. After determining the operation adjustment strategy, through this corresponding relationship, the corresponding control switch signals K1, K2, K3 can be used to send an indication signal to the electrical equipment. The solution is simple and reliable, and no program modification is required for the electrical equipment. In the case of more operation adjustment strategies or electricity price levels, the setting can be simply completed by expanding the number of switch signals.

[0085] The above K1, K2, K3, and other communication interfaces P1, P2 are only examples. Those skilled in the art can adjust the number of digital output interfaces according to needs. For example, in time-of-use electricity pricing, in addition to peak-valley levels, other levels are set, and more interfaces can also be used to indicate electricity price levels. For example, when the switch signal indicating the electricity price is expanded to two paths, four levels of electricity prices can be indicated.

[0086] On the side of the electrical equipment, it can simply determine the need to execute the operation adjustment strategy according to the switch signal. In some embodiments, a switch signal decoding device can be set up. The switch signal decoding device confirms the information of the switch signal, determines the operation adjustment strategy, and converts the operation adjustment strategy into a corresponding adjustment instruction according to the control protocol of the electrical equipment. The working process of the switch signal decoding device can be: detecting the switch signal; after the switch signal changes, determining the operation adjustment strategy corresponding to the switch signal according to the preset meaning correspondence table of the switch signal output, obtaining the control protocol of the electrical equipment, and converting the operation adjustment strategy into a corresponding adjustment instruction according to the control protocol of the electrical equipment, and sending the adjustment instruction to the electrical equipment to change the operation mode of the electrical equipment.

[0087] The control method of the above household optical energy storage system further includes: obtaining historical data of metering data; analyzing the historical data to predict the usage of the energy storage battery in the next operation cycle; performing charge and discharge operations on the energy storage battery in advance according to the usage. The historical data of the metering data can include the power difference in each metering cycle (which can be different cycles such as year, quarter, month, week, day, and especially can be daily).

[0088] The illumination state of the microgrid power generation device can be determined by the sunshine time period and season information. The control device can pre-configure or query the sunrise and sunset times and determine the power generation power in each period. In some embodiments, the illumination state can also be combined with weather forecasts to consider weather factors such as cloud thickness and rainfall. In addition, for the household optical energy storage system of this embodiment, based on the collected data and meteorological factors, a prediction model can also be established to predict the future illumination state. These models can be based on statistics or machine learning, depending on the availability and accuracy of the data.

[0089] The prediction of household electricity load involves comprehensive consideration of multiple factors, and it can be predicted in the following ways: time series prediction, machine learning prediction, etc. For example, the time series prediction method uses historical electricity consumption data to find the patterns in its time series and uses a time series model (such as the ARIMA model) for prediction. Another example is that machine learning prediction adjusts the weights between various nodes inside the neural network through learning, trains the historical electricity consumption data, and predicts the peak and trough of electricity load in the future for a period of time.

[0090] That is to say, as an edge control device, the control device of the household optical energy storage system can, on the one hand, dock with the network side to report the monitored data and obtain Internet data such as weather, and on the other hand, apply artificial intelligence algorithms locally to predict the household photovoltaic power generation and electricity consumption curves, optimize and adjust the control thresholds such as the remaining power of photovoltaic power generation and the battery SOC based on the big data of historical operation, and further optimize the economy of the overall system in combination with the electricity price policy.

[0091] This embodiment also provides a computer program product 112, a computer-readable storage medium 113, and a control device 161 of a household optical energy storage system. Figure 6 It is a schematic diagram of a computer program product 112 according to an embodiment of the present invention. Figure 7 It is a schematic diagram of a computer-readable storage medium 113 according to an embodiment of the present invention. Figure 8 It is a schematic diagram of a control device 161 according to an embodiment of the present invention. The computer program product 112 includes a computer program 111, and when the computer program 111 is executed by a processor 310, it implements the steps of any one of the above-mentioned machine control methods of the household optical energy storage system. The computer-readable storage medium 113 stores the above-mentioned computer program 111, and when the computer program 111 is executed by a processor 310, it implements the steps of any one of the above-mentioned embodiments of the machine control method of the household optical energy storage system. The control device 161 may include a memory 320, a processor 310, and a computer program 111 stored on the memory 320 and running on the processor 310.

[0092] The computer program 111 for performing the operations of the present invention may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, configuration data of an integrated circuit, or source code or object code written in any combination of one or more programming languages and procedural programming languages. The computer program 111 may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, to perform aspects of the present invention, an electronic circuit, including, for example, a programmable logic circuit, a field-programmable gate array (FPGA), or a programmable logic array (PLA), may execute computer-readable program instructions by utilizing the state information of the computer-readable program instructions to personalize the electronic circuit.

[0093] For the description of this embodiment, the computer program product 112 is a related product containing the computer program 111.

[0094] For the description of this embodiment, the computer-readable storage medium 113 is a tangible device capable of retaining and storing the computer program 111, which may be any device that can contain, store, communicate, propagate, or transport the program 11 for use by or in connection with an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of the computer-readable storage medium 113 include the following: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a memory stick, a floppy disk, a mechanically encoded device, and any suitable combination of the above.

[0095] The control device of the energy storage system 30 can be, for example, a computer device or a hardware combination after secondary development. The control device of the energy storage system 30 can be described in the general context of computer system executable instructions (such as program modules) executed by a computer system. Generally, program modules can include routines, programs, target programs, components, logics, data structures, etc. that perform specific tasks or implement specific abstract data types.

[0096] The energy storage system 30 can include a processor 310 adapted to execute stored instructions and a memory 320 that provides temporary storage space for the operation of the instructions during operation. The processor 310 can be a single-core processor, a multi-core processor, a computing cluster, or any number of other configurations. The memory 320 can include random access memory (RAM), read-only memory, flash memory, or any other suitable storage system.

[0097] The control device of the energy storage system 30 can further include a network adapter / interface and an input / output (I / O) interface. The I / O interface allows input and output of data with external devices that can be connected to the computer device. The network adapter / interface can provide communication between the computer device and a network, which is generally shown as a communication network.

[0098] At this point, those skilled in the art should recognize that although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and determined to cover all these other variations or modifications.

Claims

1. A control method for a household optical energy storage system, the household optical energy storage system comprising: A microgrid power generation device, an energy storage battery, a power conversion device, an electrical equipment, and an electric energy metering device, and the control method for the household optical energy storage system includes: Collecting the metering data of the electric energy metering device, the power of the energy storage battery, and the electricity price information; Determining the difference between the power generation power of the microgrid power generation device and the load power of the electrical equipment according to the metering data, so as to obtain a power difference; Obtaining a pre-configured energy regulation model, the energy regulation model being configured to have three information dimensions of the power difference, the power of the energy storage battery, and the electricity price information, and respectively setting a plurality of strategy matching regions according to the three information dimensions, the power differences corresponding to the plurality of strategy matching regions are all positive, and each strategy matching region corresponds to a charge and discharge strategy and / or an operation adjustment strategy; the strategy matching regions include: a load reduction region, an energy saving region, a consumption region, and a reserve mode region, wherein the operation adjustment strategy corresponding to the load reduction region is: turning off at least part of the electrical equipment; the operation adjustment strategy and the charge and discharge strategy corresponding to the energy saving region are: adjusting at least part of the electrical equipment to an energy saving mode, and charging the energy storage battery with the power generation power of the microgrid power generation device; the operation adjustment strategy corresponding to the consumption region is: adjusting at least part of the electrical equipment to a high-performance mode; the operation adjustment strategy corresponding to the reserve mode region is: starting the electrical equipment that has been partially turned off; the electricity price information includes the time-sharing period of the electricity price and the electricity consumption rate of each time-sharing period; Searching in the energy regulation model for the strategy matching region into which the power difference, the power of the energy storage battery, and the electricity price information fall, so as to obtain a target region; retrieving the charge and discharge strategy and the operation adjustment strategy corresponding to the target region; Using the power conversion device to execute the charge and discharge strategy, and sending an adjustment instruction corresponding to the operation adjustment strategy to the electrical equipment, the adjustment instruction being a switch signal obtained by converting the operation adjustment strategy through a switch coding method; Converting the electricity consumption rate into a switch signal and outputting it together with the switch signal obtained by converting the operation adjustment strategy.

2. The control method for the household optical energy storage system according to claim 1, wherein The load reduction region is set such that the power difference is within a first power threshold range, the power of the energy storage battery is within a first power threshold range, and the electricity price is a peak electricity price.

3. The control method for the household optical energy storage system according to claim 1, wherein The energy saving region is set such that the power difference is within a second power threshold range, the power of the energy storage battery is within a second power threshold range, and the electricity price is a peak electricity price.

4. The control method for the household optical energy storage system according to claim 1, wherein In the consumption region, the power difference is within a third power threshold range, and the power of the energy storage battery is within a third power threshold range.

5. The control method for the household optical energy storage system according to claim 1, wherein In the reserve mode region, the power difference is within a fourth power threshold range, and the power level of the energy storage battery is within a fourth power level threshold range.

6. The control method of the household optical energy storage system according to claim 1, wherein, The step of sending an adjustment instruction corresponding to the operation adjustment strategy to the electrical equipment includes: Converting the operation adjustment strategy into a switch signal according to a pre-configured switch coding method; Outputting the switch signal through a switch output interface as the adjustment instruction.

7. The control method of the household optical energy storage system according to claim 1, further comprising: Obtaining historical data of the metering data; Analyzing the historical data to predict the usage of the energy storage battery in the next operation cycle; Performing charge and discharge operations on the energy storage battery in advance according to the usage.

8. A control device for a household optical energy storage system, comprising a processor and a memory, wherein a computer program is stored on the memory, and when the computer program is executed by the processor, the steps of the control method of the household optical energy storage system according to any one of claims 1 to 7 are implemented.

9. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, the steps of the control method of the household optical energy storage system according to any one of claims 1 to 7 are implemented.

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