Control method for household energy system, and system, energy management apparatus and storage medium

Abstract

A control method for a household energy system (100), and an energy system, an energy management apparatus and a computer-readable storage medium. The control method comprises: when a household energy system (100) is in a grid-connected state and a non-dispatchable power generation apparatus is in a power-supplying state, acquiring a net power of the household energy system (100) during each electricity utilization period of the current day; on the basis of an electricity price of a public power grid (20), when the net power is less than zero, controlling the household energy system (100) to be powered by an energy storage apparatus (12) or by the public power grid (20); and when the net power is greater than zero, controlling the power generation apparatus to output electric energy to the energy storage apparatus (12) or the public power grid (20).

Description

Home energy system control method, system, energy management device and storage medium

[0001] Priority information

[0002] This application claims priority and benefits of the patent application with patent application number 202310972632.3 filed with the State Intellectual Property Office of China on August 2, 2023 and the patent application with patent application number 202310979971.4 filed with the State Intellectual Property Office of China on August 3, 2023, and the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the field of home energy technology, and in particular to a home energy system control method, system, energy management device and storage medium. Background Art

[0004] Current home energy management relies on smart distribution boxes, which control the on / off of each circuit load. Home loads and power management can be remotely controlled to achieve home energy system management.

[0005] In related technologies, home energy management can only control the switches of loads and power generation devices, but lacks comprehensive control over the power supply of power generation devices and public power grids as well as the power consumption of loads, resulting in insufficiently refined energy system management.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a home energy system control method, system, energy management device and storage medium to solve at least one of the above-mentioned technical problems.

[0008] A control method for a home energy system according to an embodiment of the present application includes a power distribution device, a non-time-shiftable power generation device, and an energy storage device. The power distribution device is connected to multiple loads. The control method for the home energy system includes:

[0009] When the home energy system is in a grid-connected state and the non-time-shiftable power generation device is in a power supply state, obtaining the power consumption of the multiple loads and the power generation power of the non-time-shiftable power generation device in each power consumption period of the day;

[0010] When the net power of the home energy system during each electricity usage period on the same day is greater than zero, controlling the home energy system to be powered by the energy storage device or by the public power grid based on the electricity price of the public power grid during each electricity usage period on the same day so that the electricity price meets a preset condition, wherein the net power of the home energy system during each electricity usage period on the same day is the difference between the generated power and the consumed power;

[0011] When the net power of the home energy system in each electricity usage period of the day is less than zero, the non-time-shiftable power generation device is controlled to output electric energy to the energy storage device or the public power grid according to the electricity price of each electricity usage period of the day so that the electricity fee meets the preset conditions.

[0012] The above-mentioned control method of the home energy system predicts the net power generated by the home energy system and controls the power supply and use of the power generation devices, loads and energy storage devices connected to the home energy system in combination with the electricity price of the public grid, thereby helping users to carry out fine-grained control of the home energy system.

[0013] A home energy system according to an embodiment of the present application includes an energy management device, a power distribution device, a non-time-shiftable power generation device, and an energy storage device, wherein the energy management device is electrically connected to the power distribution device, the non-time-shiftable power generation device, and the energy storage device, and the power distribution device is connected to a plurality of loads;

[0014] The energy management device is used to implement the control method of the home energy system described in any one of the above implementation modes.

[0015] An energy management device according to an embodiment of the present application includes a first processor and a first memory.

[0016] The first memory stores a computer program, which, when executed by the first processor, implements the steps of the method for controlling a home energy system as described in any one of the above embodiments.

[0017] A computer-readable storage medium according to an embodiment of the present application stores a computer program, which, when executed by a first processor, implements the steps of the method for controlling a home energy system according to any one of the above embodiments.

[0018] The above-mentioned home energy system, energy management device, distribution device and computer-readable storage medium predict the net power generated by the home energy system and control the power supply and consumption of the power generation device, load and energy storage device connected to the home energy system in combination with the electricity price of the public grid, thereby helping users to carry out fine-grained control of the home energy system.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] FIG1 is a flow chart of a method for controlling a home energy system according to an embodiment of the present application;

[0022] FIG2 is a schematic diagram of a module of a home energy system according to an embodiment of the present application;

[0023] FIG3 is a schematic structural diagram of a home energy system according to an embodiment of the present application;

[0024] Figures 4 to 6 are schematic diagrams of public grid electricity prices and net power according to embodiments of the present application;

[0025] 7 to 12 are flowcharts of a method for controlling a home energy system according to an embodiment of the present application;

[0026] FIG13 is a schematic diagram of a power supply circuit of a power distribution device according to an embodiment of the present application.

[0027] Figure numerals: Home energy system 100, energy management device 10, energy storage device 12, power distribution device 14, power generation device 16, load 18, public power grid 20, photovoltaic power generation module 22, wind power generation module 24, fuel power generation module 26, first processor 28, first memory 30, second processor 32, second memory 34, switch 36, power supply circuit 38, controller 40. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. The embodiments of the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the embodiments of the present application provide examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0030] Referring to Figures 1 to 3 , embodiments of the present application provide a control method for a home energy system 100 . The home energy system 100 includes a power distribution device 14 , a non-time-shiftable power generation device, and an energy storage device 12 . The power distribution device 14 is connected to a plurality of loads 18 . The control method for the home energy system 100 includes:

[0031] Step S101: When the home energy system 100 is in a grid-connected state and the non-time-shiftable power generation device is in a power supply state, the power consumption of multiple loads 18 and the predicted power generation of the non-time-shiftable power generation device in each power consumption period of the day are obtained;

[0032] Step S103: When the net power of the home energy system 100 for each electricity usage period on the day is greater than zero, the home energy system 100 is controlled to be powered by the energy storage device 12 or the public grid 20 based on the electricity price of the public grid 20 for each electricity usage period on the day so that the electricity price meets the preset conditions. The net power of the home energy system 100 for each electricity usage period on the day is the difference between the predicted generated power and the predicted consumed power.

[0033] Step S105: When the net power of the home energy system 100 in each power consumption period of the day is less than zero, the non-time-shiftable power generation device is controlled to output electric energy to the energy storage device 12 or the public grid 20 according to the electricity price of each power consumption period of the day so that the electricity fee meets the preset conditions.

[0034] The control method of the above-mentioned home energy system 100 predicts the net power generated by the home energy system 100, and controls the power supply and use of the power generation device 16, load 18 and energy storage device 12 connected to the home energy system 100 in combination with the electricity price of the public grid, thereby helping users to perform fine-grained control of the home energy system 100.

[0035] Specifically, as shown in FIG3 , a home energy system 100 includes an energy storage device 12, a power distribution device 14, a power generation device 16, and multiple loads 18 connected to the power distribution device 14. Furthermore, the home energy system 100 is connected to a public power grid 20, allowing the home energy system 100 to be powered by the public power grid 20 for use by the loads 18. Alternatively, the power generation device 16 can be controlled to generate electricity, or the energy storage device 12 can be controlled to output electricity to the public power grid 20 to generate revenue.

[0036] When the home energy system 100 is powered by the public grid 20, an electricity price is generated. When the home energy system 100 exports electricity to the public grid 20, an on-grid price is generated. The operation of the home energy system 100 generates an electricity bill, which is the electricity price minus the on-grid price. The electricity bill can be negative, indicating that the user's revenue from exporting electricity to the public grid 20 exceeds the cost of receiving electricity from the public grid 20. When the electricity bill is positive, a lower price indicates lower user expenses. When the electricity bill is negative, a lower price indicates a higher absolute value, indicating greater user benefits.

[0037] The power generation device 16 is used to charge the energy storage device 12 and directly supply power to the load 18. The power generation device 16 includes a non-time-shiftable power generation device and a time-shiftable power generation device.

[0038] Among them, a non-time-shiftable power generation device is a power generation device 16 that is subject to power generation conditions and whose power generation time and power generation amount cannot be controlled. For example, a non-time-shiftable power generation device may include a photovoltaic power generation module 22 and a wind power generation module 24. The photovoltaic power generation module 22 can only generate electricity when there is sunlight, and the wind power generation module 24 can only generate electricity when the wind speed meets the power generation requirements.

[0039] Time-shiftable power generation devices, such as fuel-fired power generation module 26, can generate electricity at any time after adding fuel. Furthermore, when energy storage device 12 is added to home energy system 100, it can store the electricity generated by photovoltaic module 22 and wind power module 24 and supply power to load 18 during times when electricity is needed. In this case, energy storage device 12 can also serve as a time-shiftable power generation device.

[0040] In practical applications, the modules included in the power generation device 16 can be determined according to actual environmental conditions (such as lighting conditions and wind conditions, etc.).

[0041] When the home energy system 100 is connected to the public power grid 20, it has two states: on-grid and off-grid. The on-grid state indicates that the public power grid 20 is in a supply-capable state. In this state, the home energy system 100 may or may not draw power from the public power grid 20. The off-grid state indicates that the public power grid 20 is in an unavailable state. In this state, the home energy system 100 cannot draw power from the public power grid 20, nor can it supply power to the public power grid 20.

[0042] The energy storage device 12 can receive the electric energy output by the power generation device 16 for charging, and can also supply power to a load 18. The energy storage device 12 may include one or more battery packs.

[0043] The power distribution device 14 is connected to the energy storage device 12, the power generation device 16, multiple loads 18, and the public power grid 20. The power distribution device 14 can control the on / off status of the loads 18 and can also control the home energy system 100 to be powered by one or more of the energy storage device 12, the power generation device 16, and the public power grid 20. The power distribution device 14 includes a smart socket, a smart plug, and a smart air switch, or other power distribution devices 14 that have a control module and a communication module inside and can control the devices connected thereto. The power distribution device 14 has a communication function and can read data such as the voltage, current, and temperature of the connected loads 18, the energy storage device 12, and the power generation device 16, as well as the power consumption of the loads 18 and the power generation of the power generation device 16, and can send this data to the upper-level management system for management by the upper-level management system.

[0044] The upper-level management system can be an energy management device 10 with an energy management system (EMS). The EMS can uniformly regulate and manage the home energy system 100 based on the data information of the load 18 and the energy storage device 12 obtained by the distribution device 14. For example, it can control the energy storage device 12, the power generation device 16 or the public power grid 20 to supply power to the distribution device 14, or control the distribution device 14 to switch the power on and off status of the load 18.

[0045] The loads 18 of the home energy system 100 include all electrical appliances in the home environment, including but not limited to lamps, refrigerators, ovens, range hoods, microwave ovens, rice cookers, washing machines, dryers, water heaters, electric heaters, televisions, computers, and new energy vehicles. Based on the characteristics or uses of all loads 18 in the home environment, they are divided into multiple levels of loads 18 with different power usage priorities. For example, the loads 18 in the home environment can be divided into a first load and a second load based on the correlation between their power demand and the time of power consumption. The first load has a higher power-on priority than the second load.

[0046] Among them, the first load may be a non-time-shiftable load. A non-time-shiftable load is defined as a load with high real-time electricity consumption. For example, the refrigerator needs to be turned on at all times of the day, cooking appliances such as rice cookers and range hoods must be turned on during the time periods when cooking is required every day, and lamps must be turned on during periods when natural light is insufficient. The second load may be a time-shiftable load. A time-shiftable load is defined as a load with low real-time electricity consumption. A time-shiftable load can be used at any time period throughout the day without affecting the user's use effect and experience. For example, charging of washing machines, dryers, water heaters, and new energy vehicles. In the case where the home energy system 100 has an energy storage device 12, the energy storage device 12 can be charged by the public power grid 20 or the power generation device 16. At this time, the energy storage device 12 can serve as a time-shiftable load.

[0047] In one embodiment, the load 18 of the home energy system 100 includes lamps, refrigerators, ovens, range hoods, microwave ovens, rice cookers, washing machines, dryers, water heaters, electric heaters, air conditioners, televisions, computers, and new energy vehicles, wherein the first load includes refrigerators, lamps, ovens, range hoods, microwave ovens, rice cookers, electric heaters, air conditioners, televisions, and computers; the second load includes dryers, water heaters, electric heaters, and new energy vehicles.

[0048] The power-on state and power-off state of the load 18 indicate whether the load 18 is in a connected state with the power supply circuit of the power distribution device 14. The load 18 includes loads 18 that are in working state when powered on, such as refrigerators, water heaters, etc.; and loads 18 that need to be controlled to be in working state after being powered on, such as washing machines, rice cookers, etc., which are in standby state after being powered on and need to select a working mode or other operations to enter the working state. At this time, when such a load 18 switches from the power-off state to the power-on state, it is also necessary to communicate with the controller inside the load 18 through the EMS to control the load 18 to enter the working state. For loads 18 without an internal controller, the EMS can control the load 18 to enter the working state through the infrared device on the load 18.

[0049] For controlling the home energy system 100, refer to Figures 4 to 6. Regarding the public grid electricity price, the public grid electricity price for each time period of the day is first predicted. If the public grid electricity price is not fixed, public grid electricity price data for the previous day, three days, or a certain period can be extracted, and the average value for each time period can be taken to predict the public grid electricity price for the corresponding time period of the day. Public grid electricity prices include both user-generated electricity prices and on-grid electricity prices, both of which can be predicted using historical data.

[0050] In other implementations, the electricity price and the on-grid electricity price have fixed prices in each electricity consumption period of a day. In this case, the electricity price and the on-grid electricity price of the day can be directly obtained.

[0051] For load 18, first, the first load is determined to be a non-time-shiftable load, and the second load is determined to be a time-shiftable load. The non-time-shiftable load must remain powered at all times of the day, allowing users to use it at any time. To meet the preset requirement of the lowest electricity cost, the time-shiftable load is controlled to be powered only during the hours of the day when electricity prices are the lowest, allowing users to use the time-shiftable load during these times.

[0052] When predicting the power consumption of the first and second loads for each time period of the day for a user, the power consumption data of each load 18 from the previous day, the previous three days, or a certain period of time is extracted, and the power consumption of each load 18 in each power consumption time period is averaged. This can then predict the first power consumption of the first load and the second power consumption of the second load for each power consumption time period of the day. Because users have different electricity consumption habits in different seasons, the reference historical data should not be too long when predicting power consumption. In addition, because users' electricity consumption habits may also differ on weekdays and weekends, Figure 4 shows the predicted power consumption of the first load in each time period of the day, and Figure 5 shows the predicted power consumption of the first and second loads in each time period of the day.

[0053] When predicting power consumption, for weekdays, the power consumption data of weekdays in the previous period can be extracted for prediction; for rest days, the power consumption data of rest days in the previous period can be extracted for prediction to improve the accuracy of the prediction.

[0054] Similarly, based on the power generation of the non-time-shiftable power generation device in the previous period, the power generation of the non-time-shiftable power generation device in one day is predicted.

[0055] After obtaining the net power of the home energy system 100 in each electricity consumption period of the day, the predicted generated power, the first predicted electricity power, and the second predicted electricity power, the net power of the home energy system in each electricity consumption period of the day can be obtained.

[0056] A day is divided into 12 / 24 / 48 / 72 / 144 / 288 time periods, each of which is 2 hours / 1 hour / 30 minutes / 20 minutes / 10 minutes / 5 minutes. The electricity price for each time period is averaged to obtain the corresponding electricity price for each time period. The user's electricity price in the i-th time period is recorded as rbi (Price buy, the electricity price in the i-th time period), and the user's on-grid electricity price in the i-th time period is recorded as rsi (Price sell, the electricity selling price in the i-th time period). The power consumption of the user's non-time-shiftable load in the i-th time period is recorded as Pli1 (Power load, the power consumption of the non-time-shiftable load in the i-th time period), and the power consumption of the user's time-shiftable load is recorded as Pli2 (Power load, the power consumption of the time-shiftable load in the i-th time period). The user's non-time-shiftable generated power in the i-th time period is recorded as Psi1 (Power source, the non-time-shiftable generated power in the i-th time period).

[0057] As shown in Figure 6, the net power Pi in the i-th period = (Pli1+Pli2)-Psi1. The time-shiftable load only consumes electricity during the period with the lowest electricity price. Therefore, during the period when the electricity price is higher than the lowest electricity price, Pli2 = 0, and the net power Pi = Pli1-Psi1.

[0058] When Pi>0, it means that the total power consumption of the load 18 during this period is greater than the non-time-shifted power generation. In order to minimize electricity expenditure, it is necessary to compare the electricity price and the on-grid electricity price to determine whether the home energy system 100 is powered by the energy storage device 12 or the public power grid 20.

[0059] When Pi < 0, the total power consumption of load 18 during that period is less than the non-time-shiftable power generation capacity. At this point, the non-time-shiftable power generation capacity still has surplus energy. To maximize electricity sales revenue, it is necessary to compare the electricity price with the on-grid electricity price and control the non-time-shiftable power generation equipment to output power to energy storage device 12 or public grid 20.

[0060] When Pi=0, the time-shifted generated power cannot be matched with the total power consumption, and no additional control is required.

[0061] In the embodiments of the present application, the preset condition is to minimize the electricity cost. It is understood that in other embodiments, the preset condition is not limited to minimizing the electricity cost. For example, in one embodiment, the preset condition may also be to ensure maximum power generation revenue.

[0062] Referring to FIG. 7 , in some embodiments, the electricity price of the public power grid 20 for each electricity consumption period on the same day includes the electricity price and the on-grid electricity price. Step S103 includes:

[0063] Step S1031: During a period when the electricity price is higher than the on-grid electricity price, the home energy system 100 is controlled to be powered by the energy storage device 12;

[0064] Step S1032 : During a period of time when the electricity price is lower than the on-grid electricity price, the home energy system 100 is controlled to be powered by the public grid 20 .

[0065] In this way, the electricity expenditure can be minimized to meet the preset conditions.

[0066] Specifically, when Pi>0, it means that the total power consumption of the load 18 during this period is greater than the non-time-shiftable power generation. At this time, the energy storage device 12 can be used to supply power to part of the load 18, or the public grid 20 can be used for power supply. At this time, it is necessary to compare the electricity price and the on-grid electricity price.

[0067] During the period when the electricity price is higher than the on-grid electricity price, electricity consumption will increase if the public grid 20 supplies electricity. At this time, the energy storage device 12 is controlled to supply power to the power distribution device 14 .

[0068] During the electricity consumption period when the electricity price is lower than the on-grid electricity price, the electricity consumption expenditure from the public grid 20 is small, and the home energy system 100 can be controlled to be powered by the public grid 20 .

[0069] Please refer to FIG8 . In some embodiments, the electricity price of the public grid 20 for each electricity consumption period on the same day includes the on-grid electricity price. Step S105 includes:

[0070] Step S1051: When the net power of the home energy system 100 in each electricity consumption period of the day is less than zero, control the non-time-shiftable power generation device to output electric energy to the energy storage device 12;

[0071] Step S1052 : During a period of time when the on-grid electricity price is greater than a preset on-grid electricity price, controlling the energy storage device 12 to output electric energy to the public grid 20 .

[0072] In this way, the revenue from electricity sales can be maximized to meet the preset conditions.

[0073] Specifically, when Pi < 0, the total power consumption of load 18 during that period is less than the non-time-shiftable power generation, and the non-time-shiftable power generation still has surplus energy. To maximize electricity sales revenue, when Pi < 0, the surplus energy is first stored in energy storage device 12 and then transmitted to public grid 20 during the period with the highest on-grid electricity price. When the period with Pi < 0 is also the period with the highest on-grid electricity price, the energy is directly output to public grid 20.

[0074] The preset on-grid electricity price may be the highest on-grid electricity price in the ranking of on-grid electricity prices in various time periods of a day. At this time, transmitting electric energy to the public grid 20 can obtain the maximum electricity sales revenue.

[0075] In one embodiment, there may be multiple time periods with the highest on-grid electricity prices in a day, and the time period with the highest on-grid electricity price closest to the current time period may be selected to output electric energy to the public grid 20 .

[0076] The highest on-grid electricity price period is determined only from the current period, within all remaining periods of the day. For example, if the on-grid electricity price is highest between 10:00 AM and 11:00 AM, and second highest between 2:00 PM and 3:00 PM, then before 11:00 AM, the highest on-grid electricity price period is between 10:00 AM and 11:00 AM. After 11:00 AM, the highest on-grid electricity price period is between 2:00 PM and 3:00 PM.

[0077] Referring to FIG. 9 , in some embodiments, the power distribution device 14 is used to detect the power consumption of the plurality of loads 18 and the power generation power of the non-time-shiftable power generation device. Step S101 includes:

[0078] Step S1011: Obtain the power consumption of the multiple loads 18 and the power generation of the non-time-shiftable power generation device at each time period of each day as detected by the power distribution device 14, and record them as the historical power consumption of the multiple loads 18 at each time period of each day and the historical power generation of the non-time-shiftable power generation device at each time period of each day;

[0079] Step S1013: Obtain the power consumption and power generation in each power consumption period of the day based on the historical power consumption and power generation.

[0080] In this way, the power distribution device 14 can record the power consumption data of the load 18 and the power generation data of the non-time-shiftable power generation device, so as to perform refined management according to the power supply and consumption situation of the home energy system.

[0081] Specifically, the distribution device 14 is used to detect the power consumption of the load 18 or the power generation power of the non-time-shiftable power generation device, and send the detected data to the energy management device 10 for recording, so that the energy management device 10 can predict the power consumption of the load 18 and the power generation power of the non-time-shiftable power generation device in the next 24 hours or a period of time in the future based on the recorded power consumption of each load 18 and the power generation power of the non-time-shiftable power generation device.

[0082] In one embodiment, the energy management device 10 can establish communication with the power distribution device 14 through a wired connection or a wireless connection. Specifically, the wired connection can be that the energy management device 10 uses a tangible medium such as a metal wire or an optical fiber to connect to the power distribution device 14 to establish communication, thereby realizing signal transmission; the wireless connection can be that the energy management device 10 connects to the power distribution device 14 through Wi-Fi, 4G or Bluetooth to establish communication, thereby realizing signal transmission. Specifically, when the energy management device 10 establishes communication with the power distribution device 14, the energy management device 10 can obtain data from the power distribution device 14. For example, the energy management device 10 can obtain the power consumption of each load 18 through the power distribution device 14, thereby obtaining the total power consumption of all loads 18, and obtain the power generation power of each non-time-shiftable power generation device, thereby obtaining the total power generation power of all non-time-shiftable power generation devices.

[0083] In some embodiments, each load 18 among the plurality of loads 18 is classified as a first load or a second load. When the home energy system 100 is in a grid-connected state, the power-on priority of the first load is higher than the power-on priority of the second load. The electricity price of each electricity consumption period of the public grid 20 on the same day includes the electricity price. The control method of the home energy system 100 includes:

[0084] When the home energy system 100 is in a grid-connected state, the power distribution device 14 is controlled to keep the first load powered on during each electricity usage period according to the electricity price, and the second load is controlled to be powered on during the electricity usage period when the electricity price is less than the first set value, and to be powered off during the electricity usage period when the electricity price is greater than the first set value.

[0085] In this way, the loads 18 with high power-on priority are controlled to be powered on first according to the electricity prices in different time periods, and the loads 18 with low power-on priority are powered on during the period with low electricity prices, so as to achieve the minimum electricity bill.

[0086] Specifically, when the energy storage device 12 is in a state where it cannot supply power, the power distribution device 14 needs to use the public power grid 20 for power supply.

[0087] According to the electricity price of each time period of the day, the first load is controlled to remain powered on during each electricity period. The second load is controlled to be powered on during the electricity period when the electricity price is less than a first set value, and to be powered off during the electricity period when the electricity price is greater than the first set value.

[0088] Furthermore, the power-on priority of each or a group of associated loads 18 in the first load and the second load can be further divided. For example, the first load includes a first-priority load and a second-priority load, and the second load includes a third-priority load and a fourth-priority load. The power-on priorities of the first-priority load, the second-priority load, the third-priority load and the fourth-priority load decrease in sequence.

[0089] In one embodiment, the first load further includes a first-priority load and a second-priority load. The second load includes a third-priority load and a fourth-priority load. During a period when the electricity price is higher than a first set value, the first-priority load and the second-priority load can be controlled to be powered on, while the third-priority load and the fourth-priority load can be controlled to be powered off. During a period when the electricity price is lower than the first set value, the third-priority load and the fourth-priority load can be controlled to be powered on. The power-on priority can indicate the real-time nature of the electricity consumption of the load 18. Controlling the load 18 with lower real-time electricity consumption to be turned on during periods with lower electricity prices can effectively reduce electricity bills.

[0090] In one embodiment, the first set value is the lowest electricity price of the day, that is, the power distribution device 14 is controlled to energize the second load during the period corresponding to the lowest electricity price and to deenergize the second load during other periods. In this way, the electricity cost can be minimized and the preset conditions can be met.

[0091] In some embodiments, each of the plurality of loads 18 is configured with an importance level, and a load 18 with a high importance level has a higher power-on priority than a load 18 with a low importance level. The control method includes:

[0092] Step S109: When the home energy system 100 is in an off-grid state and the energy storage device 12 is in a power supply state, the power distribution device 14 is controlled to be powered by the energy storage device 12, and the power on and off states of the multiple loads 18 are controlled separately according to the importance level of each load 18 in the multiple loads 18.

[0093] In this way, when the power of the energy storage device 12 is limited, the on / off state of the load 18 can be controlled according to the power-on priority of the load 18, thereby extending the operating time of the load 18 with a high power-on priority.

[0094] Specifically, when the home energy system 100 is in an off-grid state and the energy storage device 12 is in a power-supply state, the power distribution device 14 is controlled to be powered by the energy storage device 12 .

[0095] The importance level of the load 18 can be set by the user or preset in the home energy system 100. The importance level of the load 18 determines the power-on priority of the load 18, and the power-on priority of a load with a high importance level is higher than that of a load with a low importance level.

[0096] At this time, according to the importance level of the load 18, the load 18 with a high importance level can be controlled to be in a powered-on state, and the load 18 with a low importance level can be controlled to be in a powered-off state, so as to save the power of the energy storage device 12 and extend the operating time of the load 18 with a high importance level.

[0097] Referring to FIG. 10 , in some embodiments, step S109 includes:

[0098] Step S1091: Obtaining the remaining power of the energy storage device 12;

[0099] Step S1092: Based on the remaining power and the importance levels of the multiple loads 18, control the power distribution device 14 so that the loads 18 in the power-on state among the multiple loads 18 are switched to the power-off state according to the importance levels from low to high. The smaller the remaining power, the fewer the number of loads 18 in the power-on state.

[0100] In this way, in an off-grid state, the on and off states of the loads 18 can be controlled according to the power-on priority of the loads 18 , ensuring that the loads 18 with high power-on priority can operate normally.

[0101] Specifically, in an off-grid state, home energy system 100 cannot draw power from public grid 20. Energy storage device 12 is a critical power source. To ensure the normal operation of high-importance loads 18, when the remaining power level of energy storage device 12 is less than a first set power level, power distribution device 14 can be controlled to de-energize low-importance loads 18.

[0102] In one embodiment, the loads 18 of multiple importance levels include a first priority load, a second priority load, a third priority load, and a fourth priority load, with their power-on priorities decreasing in sequence. As the remaining power decreases, the fourth priority load, the third priority load, and the second priority load are sequentially powered off. When the remaining power of the energy storage device 12 is less than a first set power level, only the first priority load is powered on.

[0103] In one embodiment, the first set power is 20%. In other embodiments, the first set power can be set according to the number and power consumption of the loads 18 with the highest importance level.

[0104] Referring to FIG. 11 , in some embodiments, step S109 includes:

[0105] Step S1093: Obtain the remaining power of the energy storage device 12 and the required operating time of the load 18 whose importance level is higher than the preset level;

[0106] Step S1094: Obtaining the operating power required to maintain the load 18 having an importance level higher than a preset level for the required operating time according to the required operating time;

[0107] Step S1095: When the remaining power is less than the operating power, the load 18 with an importance level higher than the preset level is controlled to be powered on, and the other loads are controlled to be powered off.

[0108] In this way, in the off-grid state, the on / off state of the load 18 can be controlled according to the importance level of the load 18, ensuring that the load 18 with a high importance level can maintain a working state within the required operating time.

[0109] Specifically, in an off-grid state, to maintain the operating time of some high-importance loads 18, the operating power required to maintain the high-importance loads 18 for the required operating time can be calculated based on the operating power and required operating time of the high-importance loads 18. When the remaining power of the energy storage device 12 is less than the operating power, the power distribution device 14 is controlled to disconnect the other loads 18 and keep the high-importance loads 18 powered on. This ensures that the high-importance loads 18 can operate normally within the required operating time.

[0110] For example, loads 18 include first-priority loads, second-priority loads, and third-priority loads, ranked from high to low in importance, with their power-on priorities decreasing in descending order. When the preset level is second priority, and the remaining battery power is less than the operating power level, the first-priority load is powered on, while the second- and third-priority loads are powered off. The preset levels can be set based on user needs.

[0111] Referring to FIG. 12 , in some embodiments, step S109 includes:

[0112] Step S1096: Obtain the total power consumption of all loads 18 in the power distribution device 14 that are in the energized state;

[0113] Step S1097: When the total power consumption is greater than the set power, the power distribution device 14 is controlled to switch the loads 18 in the power-on state among the multiple loads 18 to the power-off state in order from low to high importance level until the total power consumption is no greater than the set power.

[0114] In this way, in an off-grid state, the on / off state of the load 18 can be controlled according to the importance level of the load 18, ensuring that power is supplied to the load 18 with a high importance level first.

[0115] Specifically, in an off-grid state, the on / off state of the loads 18 can be controlled according to the total power consumption of all the loads 18 in the on state and the importance level of the loads 18 .

[0116] In one embodiment, the loads 18 have a first priority and a second priority, ranked in descending order of importance. A set power is set. If the total power consumption of all energized loads 18 on the power distribution device 14 exceeds the set power, the power distribution device 14 is controlled to de-energize the second priority loads while maintaining the first priority loads energized.

[0117] In one embodiment, loads 18 include first, second, and third priority loads, ranked in descending order of importance. The powering priorities of the first, second, and third priority loads decrease in descending order. A set power is set. If the total power consumption of all energized loads 18 on the power distribution device 14 exceeds the set power, the power distribution device 14 is controlled to de-energize the second and third priority loads while maintaining the power supply to the first priority load.

[0118] In one embodiment, the loads 18 include a first-priority load, a second-priority load, and a third-priority load, ranked from high to low in importance. Two set powers are set: a first set power and a second set power, with the first set power being less than the second set power. Thus, when the total power consumption of all energized loads 18 reaches the first set power, the power distribution device 14 is controlled to de-energize the third-priority loads 18 while maintaining the first- and second-priority loads 18 energized. When the total power consumption of all energized loads 18 reaches the second set power, the power distribution device 14 is controlled to de-energize the second- and third-priority loads while maintaining the first-priority load 18 energized.

[0119] It can be understood that when there are more than three loads 18 with different power-on priorities and there are three or more set powers, the loads 18 with different priorities can be controlled according to the above method.

[0120] In some embodiments, the importance level of the load is set by default in the home energy system and / or by input instructions from the user.

[0121] In this way, the importance level of the load 18 can be set according to user needs.

[0122] Specifically, the importance level of load 18 can be set by default by the home energy system 100, for example, based on the typical power demand of load 18. Alternatively, the importance level of load 18 can be set by user input. The importance level of load 18 can be set based on the user's usage needs or preferences. For example, if the user needs to keep their computer running 24 hours a day, the computer's importance level can be set to the highest. For example, if the user does not need to use cooking appliances, the importance level of all cooking appliances can be set to the lowest. Alternatively, the power-on priority of load 18 can be partially set by default by the home energy system 100 and partially set by the user.

[0123] In some embodiments, when the remaining power of the energy storage device 12 is less than the second set power, the energy storage device 12 is in a non-power supply state;

[0124] When the remaining power of the energy storage device 12 is greater than the second set power, the energy storage device 12 is in a power supply state.

[0125] In this way, whether the energy storage device 12 is in a power supply state can be determined based on the remaining power of the energy storage device 12.

[0126] Specifically, when the remaining power of the energy storage device 12 is less than the second set power, the energy storage device 12 is in a state where it cannot supply power. At this time, the power generation device 16 can be controlled to charge the energy storage device 12. When the remaining power of the energy storage device 12 is greater than the second set power, the energy storage device 12 can be controlled to supply power to the load 18. Alternatively, the energy storage device 12 can have sufficient power for use in an off-grid state. The second set power can be a system default setting or set according to user needs. In one embodiment, the second set power is 20%. When the remaining power of the energy storage device 12 is less than 20%, the energy storage device 12 is in a state where it cannot supply power. The first set power can be the same as the second set power, or they can be set separately.

[0127] In summary, in the grid-connected state, the energy storage device 12, power generation device 16, and load 18 of the home energy system 100 are controlled based on the generated power, power consumption, and the electricity price of the public grid, thereby achieving the optimal electricity rate. In the off-grid state, it is necessary to control the switching of loads 18 of different importance levels to ensure that loads 18 with higher importance levels can remain in operation for a longer period of time under limited power consumption. Through the above method, the distribution device 14 is used to manage the energy storage device 12, power generation device 16, and each load 18 connected to the home energy system 100, which can help users achieve refined management of the loads 18 of the home energy system 100.

[0128] Please refer to Figures 2 and 3. A home energy system 100 according to an embodiment of the present application includes an energy management device 10, an energy storage device 12, a distribution device 14 and a non-time-shiftable power generation device. The energy management device 10 is electrically connected to the distribution device 14, the energy storage device 12 and the non-time-shiftable power generation device, and the distribution device 14 is connected to multiple loads 18.

[0129] The energy management device 10 is used to implement the control method of the home energy system 100 described in any one of the above embodiments.

[0130] Specifically, the energy management device 10 can centrally control the power supply and use of the home energy system 100. For example, it can control the power distribution device 14 to be powered by the energy storage device 12 or the public power grid 20. Alternatively, it can control the power distribution device 14 to transmit power to the energy storage device 12 or to the public power grid 20. Alternatively, the energy management device 10 can control the power distribution device 14 to power on or off loads of different priorities.

[0131] Home energy system 100 includes loads 1, 2, ..., and n. In a grid-connected state, loads 1, 2, ..., and n can be divided into non-time-shiftable loads (first loads) and time-shiftable loads (second loads). In an off-grid state, loads 1, 2, ..., and n can be divided into loads of varying importance.

[0132] The energy management device 10 can also connect to a user's terminal device, such as a mobile phone. After installing the corresponding application, the user's mobile phone can receive information from the energy management device 10, including information such as the power usage time of loads 18 of different priorities and the number and names of loads 18 currently powered on. Terminal devices include, but are not limited to, smartphones, tablets, and wearable smart devices.

[0133] In one embodiment, the energy management device 10 can plan electricity consumption for the next 24 hours. First, the energy management device 10 can plan the electricity price and grid-connected electricity price for the next 24 hours based on historical electricity prices and historical grid-connected electricity prices. At the same time, since the electricity demand of non-time-shiftable loads is highly correlated with the electricity consumption period, the power consumption of non-time-shiftable loads in the next 24 hours can also be relatively accurately calculated. Therefore, based on the electricity price and grid-connected electricity price for the next 24 hours and the electricity consumption of non-time-shiftable loads, the power consumption period of the time-shiftable load can be planned, and the electricity consumption plan can be sent to the user's terminal device.

[0134] In some embodiments, the energy management device 10 includes a first energy management device and a second energy management device, the second energy management device is used to send a detection signal to the first energy management device and receive a response signal returned by the first energy management device. If the second energy management device does not receive a response signal, the second energy management device is used to take over the first energy management device.

[0135] In this way, setting up a backup energy management device can make the home energy system 100 more stable.

[0136] Specifically, if the second energy management device sends a detection signal to the first energy management device but does not receive a response signal returned by the first energy management device, the second energy management device can determine that the first energy management device is abnormal (for example, it is down, etc.), and thus, the second energy management device can take over the work of the first energy management device. That is, in this case, the second energy management device can obtain the power consumption of the load 18 and the power generation power of the non-time-shiftable power generation device, as well as the control method for the home energy system 100 described in any of the above-mentioned implementation methods, thereby preventing the problem of the distribution system being unable to work when the first energy management device is abnormal, and improving the stability of the home energy system 100.

[0137] In other embodiments, the first energy management device and the second energy management device can perform mutual detection to determine whether the other is operating normally. For example, one of the first energy management device and the second energy management device sends a detection signal to the other and receives a response signal from the other. The response signal is used to determine whether the other is abnormal.

[0138] In some embodiments, the power distribution device 14 includes at least one of a smart socket, a smart plug, or a smart air switch.

[0139] In this way, the energy management device 10 can obtain the power consumption of each load 18 and the power generation power of each non-time-shiftable power generation device and manage them in detail.

[0140] Specifically, the power distribution device 14 is connected to the energy storage device 12, the power generation device 16, multiple loads 18, and the public power grid 20. The power distribution device 14 can control the power on and off status of the loads 18, and can also control the home energy system 100 to be powered by one or more of the energy storage device 12, the power generation device 16, and the public power grid 20. The power distribution device 14 includes a smart socket, a smart plug, and a smart air switch, or other power distribution devices 14 that have a control module and a communication module inside and can control the devices connected thereto. The power distribution device 14 has a communication function and can read data such as the voltage, current, and temperature of the connected loads 18, the energy storage device 12, and the power generation device 16, as well as the power consumption of the loads 18 and the power generation of the power generation device 16, and can send this data to the energy management device 10, so that the energy management device 10 can perform refined management of the loads 18 and the non-time-shiftable power generation devices in the home energy system 100.

[0141] Please refer to Figure 3. An energy management device 10 according to an embodiment of the present application includes a first processor 28 and a first memory 30. The first memory 30 stores a computer program. When the computer program is executed by the first processor 28, it implements the steps of the home energy system control method of any of the above embodiments.

[0142] A power distribution device 14 according to an embodiment of the present application is configured to establish a communication connection with an energy management device 10 .

[0143] In one embodiment, the power distribution device 14 includes a controller 40, a power supply circuit 38, and a plurality of switches 36. The power distribution device 14 is electrically connected to the energy storage device 12, the non-time-shiftable power generation device, and the plurality of loads 18. The controller 40 is electrically connected to the plurality of switches 36. The plurality of switches 36 and the plurality of loads 18 are connected to the power supply circuit 38. Each switch 36 controls the on / off state of a corresponding load 18. The controller is used to receive control instructions sent by the energy management device 10 and control the corresponding switch 36 according to the control instructions to control the on / off state of the corresponding load 18. The controller 40 includes a second processor 32 and a second memory 34. At this time, when the power distribution device 14 is powered by the energy storage device 12, its circuit diagram is shown in Figure 13.

[0144] When the power distribution device 14 is connected to the energy storage device 12 and the non-shiftable power generation device, it can obtain information such as the power supplied by the energy storage device 12 and the power generated by the non-shiftable power generation device and transmit it to the controller. Simultaneously, the power distribution device 14 can receive instructions from the controller to control the home energy system to be powered by the energy storage device 12 or the non-shiftable power generation device. The power distribution device 14 can also control the non-shiftable power generation device to charge the energy storage device 12 based on the instructions from the controller.

[0145] In one embodiment, the controller can be controlled by the energy management device 10 connected to the home energy system 100, receive control instructions sent by the energy management device 10 and control corresponding switches according to the control instructions to control the power on and off status of the corresponding load 18.

[0146] In one embodiment, the controller may independently execute the steps of the control method of the home energy system 100 described above to control the power supply and use of the home energy system 100 .

[0147] A computer-readable storage medium according to an embodiment of the present application stores a computer program, which, when executed by a processor, implements the steps of the method for controlling a home energy system according to any one of the above embodiments.

[0148] Specifically, the processor may be the first processor 28 of the energy management device 10 , or may be a processor of other devices or equipment.

[0149] The above-mentioned home energy system 100, energy management device 10, distribution device 14 and computer-readable storage medium can control the on and off status of the load 18 connected to the distribution device 14 according to the power supply status of the energy storage device 12 and the priority of the load 18 when the distribution device 14 is powered by different power sources, thereby realizing control of each load 18 in the home power grid, thereby helping users to achieve refined management of the load 18.

[0150] It should be noted that the above-mentioned explanation of the implementation method and beneficial effects of the control method of the home energy system is also applicable to the home energy system 100, energy management device 10, distribution device 14 and computer-readable storage medium used in the implementation method of this application. To avoid redundancy, they will not be elaborated here.

[0151] In one embodiment, when the computer program is executed by a processor, the steps of the method for controlling a home energy system include:

[0152] Step S101: When the home energy system 100 is in a grid-connected state and the non-time-shiftable power generation device is in a power supply state, the power consumption of multiple loads 18 and the predicted power generation of the non-time-shiftable power generation device in each power consumption period of the day are obtained;

[0153] Step S103: When the net power of the home energy system 100 for each electricity usage period on the day is greater than zero, the home energy system 100 is controlled to be powered by the energy storage device 12 or the public grid 20 based on the electricity price of the public grid 20 for each electricity usage period on the day so that the electricity price meets the preset conditions. The net power of the home energy system 100 for each electricity usage period on the day is the difference between the predicted generated power and the predicted consumed power.

[0154] Step S105: When the net power of the home energy system 100 in each power consumption period of the day is less than zero, the non-time-shiftable power generation device is controlled to output electric energy to the energy storage device 12 or the public grid 20 according to the electricity price of each power consumption period of the day so that the electricity fee meets the preset conditions.

[0155] It is understood that a computer program includes computer program code. The computer program code may be in source code form, object code form, executable file or some intermediate form, etc. Computer-readable storage media may include: any entity or device capable of carrying computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), and software distribution medium, etc. The processor may be a central processing unit, or other general-purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.

[0156] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0157] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as mentioned above, and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods of each embodiment of the present application.

[0158] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above implementation methods within the scope of the present application.

Claims

1. A control method for a home energy system, the home energy system comprising a power distribution device, a non-time-shiftable power generation device and an energy storage device, the power distribution device being connected to a plurality of loads, wherein: The control method of the home energy system comprises: When the home energy system is in a grid-connected state and the non-time-shiftable power generation device is in a power supply state, obtaining the power consumption of the multiple loads and the power generation power of the non-time-shiftable power generation device in each power consumption period of the day; When the net power of the household energy system in each power consumption period of the day is greater than zero, according to the electricity price of the public power grid in each power consumption period of the day, the household energy system is controlled to be powered by the energy storage device or by the public power grid so that the electricity fee meets the preset conditions, and the net power of the household energy system in each power consumption period of the day is the difference between the generated power and the consumed power; When the net power of the household energy system in each power usage period of the day is less than zero, the non-time-shiftable power generation device is controlled to output electric energy to the energy storage device or the public power grid according to the electricity price of each power usage period of the day so that the electricity fee meets the preset conditions.

2. The control method of the home energy system according to claim 1, wherein: The electricity prices of the public power grid for each electricity consumption period on the day include the electricity price and the on-grid electricity price. According to the electricity prices of the public power grid for each electricity consumption period on the day, controlling the home energy system to be powered by the energy storage device or by the public power grid so that the electricity fee meets the preset conditions includes: During the electricity consumption period when the electricity price is greater than the on-grid electricity price, controlling the home energy system to be powered by the energy storage device; During the electricity consumption period when the electricity price is lower than the on-grid electricity price, the home energy system is controlled to be powered by the public power grid.

3. The control method of the home energy system according to claim 1, wherein: The electricity prices of each electricity consumption period of the day include the on-grid electricity price. According to the electricity prices of each electricity consumption period of the day, controlling the non-time-shiftable power generation device to output electric energy to the energy storage device or the public power grid so that the electricity fee meets the preset conditions includes: When the net power of the household energy system in each power consumption period of the day is less than zero, controlling the non-time-shiftable power generation device to output electric energy to the energy storage device; During a power consumption period when the on-grid electricity price is greater than the preset on-grid electricity price, the energy storage device is controlled to output electric energy to the public power grid.

4. The control method of the home energy system according to claim 1, wherein: The power distribution device is used to detect the power consumption of the multiple loads and the power generation power of the non-time-shiftable power generation device, and the obtaining of the power consumption of the multiple loads and the power generation power of the non-time-shiftable power generation device in each power consumption period of the day includes: Obtain the power consumption of the multiple loads and the power generation power of the non-time-shiftable power generation device at each time period of each day detected by the power distribution device, and record them as the historical power consumption of the multiple loads at each time period of each day and the historical power generation power of the non-time-shiftable power generation device at each time period of each day; The power consumption and the power generation in each power consumption period of the day are obtained according to the historical power consumption and the historical power generation.

5. The control method of the home energy system according to any one of claims 1 to 4, wherein: Each load among the multiple loads is divided into a first load or a second load, when the home energy system is in a grid-connected state, the power-on priority of the first load is higher than the power-on priority of the second load, the electricity price of each electricity consumption period of the public power grid on the day includes the electricity price, and the control method of the home energy system includes: When the home energy system is in a grid-connected state, the power distribution device is controlled according to the electricity price so that the first load remains powered on during each electricity usage period, and the second load is controlled to be powered on during the electricity usage period when the electricity price is less than a first set value, and to be powered off during the electricity usage period when the electricity price is greater than the first set value.

6. The control method of the home energy system according to claim 1, wherein: Each of the multiple loads is respectively configured with an importance level, and the power-on priority of a load with a high importance level is higher than the power-on priority of a load with a low importance level. The control method includes: When the household energy system is in an off-grid state and the energy storage device is in a power supply state, the power distribution device is controlled to be powered by the energy storage device. The energy device supplies power, and controls the on and off states of the multiple loads respectively according to the importance level of each load among the multiple loads.

7. The control method of the home energy system according to claim 6, wherein: When the home energy system is in an off-grid state and the energy storage device is in a power supply state, controlling the power distribution device to be powered by the energy storage device, and controlling the power on and off states of the multiple loads respectively according to the importance level of each load in the multiple loads includes: Obtaining the remaining power of the energy storage device; According to the remaining power and the importance levels of the multiple loads, the power distribution device is controlled so that the loads in the power-on state among the multiple loads are switched to the power-off state from low to high according to the importance levels. The smaller the remaining power is, the smaller the number of loads in the power-on state is.

8. The control method of the home energy system according to claim 6, wherein: When the home energy system is in an off-grid state and the energy storage device is in a power supply state, controlling the power distribution device to be powered by the energy storage device, and controlling the power on and off states of the multiple loads respectively according to the importance level of each load in the multiple loads includes: Obtaining the remaining power of the energy storage device and the required operating time of the load whose importance level is higher than the preset level; According to the required operating time, obtaining the operating power required to maintain the load with the importance level higher than the preset level for the required operating time; When the remaining power is less than the operating power, the loads whose importance level is higher than the preset level are controlled to be powered on, and the other loads are powered off.

9. The control method of the home energy system according to claim 6, wherein: When the home energy system is in an off-grid state and the energy storage device is in a power supply state, controlling the power distribution device to be powered by the energy storage device, and controlling the power on and off states of the multiple loads respectively according to the importance level of each load in the multiple loads includes: Obtaining the total power consumption of all loads in the power distribution device that are powered on; When the total power consumption is greater than the set power, the power distribution device is controlled so that the multiple loads in the power-on state are switched to the power-off state in sequence according to the order of the importance level from low to high until the total power consumption is no greater than the set power.

10. The control method of a home energy system according to any one of claims 6 to 9, wherein: The importance levels of the multiple loads are set by default in the home energy system and / or by input instructions of a user.

11. A home energy system, wherein: It includes an energy management device, an energy storage device, a power distribution device and a non-time-shiftable power generation device, wherein the energy management device is electrically connected to the power distribution device, the non-time-shiftable power generation device and the energy storage device, and the power distribution device is connected to a plurality of loads; The energy management device is used to implement the control method of the home energy system according to any one of claims 1-10.

12. The home energy system according to claim 11, characterized in that: The energy management device includes a first energy management device and a second energy management device. The second energy management device is used to send a detection signal to the first energy management device and receive a response signal returned by the first energy management device. If the second energy management device does not receive the response signal, the second energy management device is used to take over the first energy management device.

13. The home energy system according to claim 11, characterized in that: The power distribution device includes at least one of a smart socket, a smart plug or a smart air switch.

14. A home energy system, wherein: It includes an energy management device, an energy storage device, a power distribution device and a non-time-shiftable power generation device, wherein the energy management device is electrically connected to the power distribution device, the non-time-shiftable power generation device and the energy storage device, and the power distribution device is connected to a plurality of loads; The energy management device comprises: a first processor; and A first memory, wherein the first memory stores a computer program, and when the computer program is executed by the first processor, the steps of the method for controlling a home energy system according to any one of claims 1 to 10 are implemented.

15. An energy management device, wherein: include: a first processor; and A first memory, wherein the first memory stores a computer program, and when the computer program is executed by the first processor, the steps of the method for controlling a home energy system according to any one of claims 1 to 10 are implemented.

16. A computer-readable storage medium having a computer program stored thereon, wherein: When the computer program is executed by a processor, the steps of the method for controlling a home energy system according to any one of claims 1 to 10 are implemented.

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