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

Abstract

The present application relates to a control method, system, energy management device, and storage medium for a home energy system 100. The control method obtains net power generated in each power consumption period of the home energy system 100 during a day when the home energy system 100 is in an on-grid state and a non-time-shiftable power generation device is in a power supply-ready state, and controls the home energy system 100 to be supplied with power from an energy storage device 12 or from the public power grid 20 when the net power is less than zero according to the power price of the public power grid 20, and controls the power generation device to output electrical energy to the energy storage device 12 or the public power grid 20 when the net power is greater than zero.

Description

[Technical Field]

[0001] This application claims priority to and benefits from patent application No. 202310972632.3 filed with the State Intellectual Property Office of China on August 2, 2023, and patent application No. 202310979971.4 filed with the State Intellectual Property Office of China on August 3, 2023, the entire texts of which are incorporated herein by reference.

[0002] The present application relates to the technical field of home energy, and in particular to a home energy system control method, system, energy management device, and storage medium. [Background technology]

[0003] Current home energy management relies on intelligent distribution boxes, which control the on / off of the loads of each circuit through the intelligent distribution box, and remotely control the home's loads and power management, thereby realizing home energy system management.

[0004] Among related technologies, home energy management can only control the switches of the load and power generation device, and lacks comprehensive management control of the power generation device, power supply to the public power grid, and power for the load, resulting in the inability to manage the energy system in a detailed manner. Summary of the Invention

[0005] SUMMARY OF THE INVENTION To solve at least one of the above-mentioned technical problems, embodiments of the present application provide a home energy system control method, system, energy management device, and storage medium.

[0006] A control method for a home energy system according to an embodiment of the present application includes a power distribution device connected to a plurality of loads, a power generation device that cannot be time-shifted, and an energy storage device, When the home energy system is in an on-grid state and the power generation device that cannot be time-shifted is in a power supply capable state, acquiring the power consumption of the plurality of loads and the power generation of the power generation device that cannot be time-shifted in each power consumption period of the day; When a net power, which is a difference between the generated power and the consumed power, of the home energy system for each power consumption period of the day is greater than zero, controlling the power supply from the energy storage device of the home energy system or the power supply from the public power grid according to the power price of the public power grid for each power consumption period of the day so that the electricity rate satisfies a predetermined condition; and when the net power of the home energy system for each power consumption period of the day is less than zero, controlling the power generation device that cannot time-shift to output electrical energy to the energy storage device or the public power grid according to the power price for each power consumption period of the day so that the electricity rate satisfies the predetermined condition.

[0007] The home energy system control method predicts the net power generated by the home energy system and controls the power supply and power consumption of the power generation device, load, and energy storage device connected to the home energy system in accordance with the power price on the public power grid, thereby supporting detailed control of the home energy system by the user.

[0008] According to one embodiment of the present application, there is provided a home energy system including an energy management device, a power distribution device connected to a plurality of loads, 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; The energy management device is used to realize the home energy system control method described in any of the above embodiments.

[0009] An energy management device according to an embodiment of the present application includes a first processor and a first memory.

[0010] The first memory stores a computer program that, when executed by the first processor, implements the steps of the home energy system control method described in any of the embodiments.

[0011] A computer-readable storage medium according to an embodiment of the present application stores a computer program that, when executed by a first processor, executes the steps of the home energy system control method described in any of the above embodiments.

[0012] The above-mentioned home energy system control method, energy management device, power distribution device, and computer-readable storage medium predict the net power generation of the home energy system and control the power supply and power consumption of the power generation devices, loads, and energy storage devices connected to the home energy system in accordance with the power price on the public power grid, thereby supporting users in fine-tuned control of the home energy system.

[0013] Additional aspects and advantages of the present application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present application.

[0014] The above and / or additional aspects and advantages of the present application will become apparent and easier to understand from the following description of the embodiments in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic diagram showing the flow of a control method for a home energy system according to an embodiment of the present application. [Figure 2] 1 is a block schematic diagram of a home energy system according to an embodiment of the present application. [Figure 3]1 is a schematic diagram illustrating the structure of a home energy system according to an embodiment of the present application. [Figure 4] 1 is a schematic diagram of electricity prices and net power of a public power grid according to an embodiment of the present application; [Figure 5] 1 is a schematic diagram of electricity prices and net power of a public power grid according to an embodiment of the present application; [Figure 6] 1 is a schematic diagram of electricity prices and net power of a public power grid according to an embodiment of the present application; [Figure 7] 1 is a schematic diagram showing the flow of a control method for a home energy system according to an embodiment of the present application. [Figure 8] 1 is a schematic diagram showing the flow of a control method for a home energy system according to an embodiment of the present application. [Figure 9] 1 is a schematic diagram showing the flow of a control method for a home energy system according to an embodiment of the present application. [Figure 10] 1 is a schematic diagram showing the flow of a control method for a home energy system according to an embodiment of the present application. [Figure 11] 1 is a schematic diagram showing the flow of a control method for a home energy system according to an embodiment of the present application. [Figure 12] 1 is a schematic diagram showing the flow of a control method for a home energy system according to an embodiment of the present application. [Figure 13] 1 is a schematic diagram of a power supply circuit of a power distribution device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0016]

[0033] In the following, the embodiments of the present specification shown in the accompanying drawings will be described in detail, where the same or similar reference numerals throughout indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and are not to be construed as limiting the present application.

[0017] The following disclosure provides many different embodiments or examples for realizing different structures of the embodiments of the present application. To simplify the disclosure of the embodiments of the present application, specific example components and settings will be described below. Of course, these are merely examples and are not intended to limit the present application. The embodiments of the present application may repeat reference numerals and / or characters in different examples; such repetition is for the purposes of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed. Furthermore, while various specific processes and materials are examples described in the embodiments of the present application, those skilled in the art may recognize the applicability of other processes and / or the use of other materials.

[0018] 1 to 3, an embodiment of the present application provides a control method for a home energy system 100, which includes a power distribution device 14 connected to a plurality of loads 18, a non-time-shiftable power generation device, and an energy storage device 12, and the control method for the home energy system 100 includes steps S101, S103, and S105.

[0019] In step S101, if the home energy system 100 is in an on-grid state and the power generation device that cannot be time-shifted is in a state where it can supply power, the power consumption of multiple loads 18 for each power consumption period of the day and the predicted power generation power of the power generation device that cannot be time-shifted are obtained.

[0020] In step S103, if the net power, which is the difference between the predicted power generation and predicted power consumption of the home energy system 100 for each power consumption period of the day, is greater than zero, the power supply from the energy storage device 12 of the home energy system 100 or the power supply from the public power network 20 is controlled in accordance with the power price for each power consumption period of the day on the public power network 20 so that the electricity rate satisfies the predetermined condition.

[0021] In step S105, if the net power of the home energy system 100 for each power consumption period of the day is less than zero, the system controls the power generation device that cannot be time-shifted to output electrical energy to the energy storage device 12 or the public power grid 20 so that the electricity rate meets the predetermined conditions according to the electricity price for each power consumption period of the day.

[0022] The control method for the home energy system 100 predicts the net power generated by the home energy system 100 and controls the power supply and power consumption of the power generation device 16, the load 18, and the energy storage device 12 connected to the home energy system 100 in accordance with the power price on the public power grid, thereby supporting the user in finely controlling the home energy system 100.

[0023] 3, the home energy system 100 includes an energy storage device 12, a power distribution device 14, a power generation device 16, and a plurality of loads 18 connected to the power distribution device 14, and is also connected to a public power grid 20 that can supply power to the home energy system 100 for use by the loads 18. Alternatively, the power generation device 16 or the energy storage device 12 may be controlled to output electrical energy to the public power grid 20 after generating power to generate revenue.

[0024] Among these, when the home energy system 100 receives power from the public power grid 20, a power consumption price is incurred, and when the home energy system 100 outputs electrical energy to the public power grid 20, an on-grid power price is incurred. The home energy system 100 operates and incurs an electricity fee. In this case, the electricity fee is the power consumption price minus the on-grid power price. The electricity fee may be a negative value, which means that the revenue a user gains by outputting electrical energy to the public power grid 20 is greater than the cost the user incurs by receiving power from the public power grid 20. When the electricity fee is a positive value, a smaller electricity fee indicates less expenditure by the user, and when the electricity fee is a negative value, a smaller electricity fee indicates a larger absolute value of the electricity fee and thus a higher revenue for the user.

[0025] The power generation devices 16 are for charging the energy storage device 12 and for directly powering the loads 18. The power generation devices 16 include non-time-shiftable power generation devices and time-shiftable power generation devices.

[0026] Here, the power generation device that cannot be time-shifted is a power generation device 16 that is dependent on the power generation conditions and whose power generation time and power generation amount cannot be controlled, and for example, the power generation device that cannot be time-shifted can include a solar power generation module 22 and a wind power generation module 24. The solar power generation module 22 can generate power under the condition that light is irradiated, and the wind power generation module 24 can generate power under the condition that the wind speed reaches the power generation requirement.

[0027] A time-shiftable power generation device such as the fuel power generation module 26 can generate power for any period of time after adding fuel. In addition, if the energy storage device 12 is added to the home energy system 100, the energy storage device 12 can store the power generated by the solar power generation module 22 and the wind power generation module 24 and supply power to the load 18 during periods when power consumption is required, and at this time, the energy storage device 12 can also be used as a time-shiftable power generation device.

[0028] In practical applications, the modules included in the power generation device 16 can be determined according to the actual environmental conditions (eg, lighting conditions, wind conditions, etc.).

[0029] When the home energy system 100 is connected to the public power grid 20, the home energy system 100 has two states: an on-grid state and an off-grid state. The on-grid state indicates that the public power grid 20 is in a state where it can supply power, and in this state, the home energy system 100 can either extract power from the public power grid 20 or not extract power from the public power grid 20. The off-grid state indicates that the public power grid 20 is in a state where it cannot supply power, and in this state, the home energy system 100 cannot extract power from the public power grid 20, nor can it output electrical energy to the public power grid 20.

[0030] The energy storage device 12 can be charged by receiving electrical energy output from the power generation device 16, and can also supply power to the load 18. The energy storage device 12 can include one or more battery packs.

[0031] The power distribution device 14 connects the energy storage device 12, the power generation device 16, multiple loads 18, and the public power grid 20, and can control the power on / off state of the loads 18. It can also control the supply of power to the home energy system 100 from any 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 receptacle, a smart plug, a smart air switch, or other device having a control module and a communication module therein and capable of controlling the equipment connected thereto. The power distribution device 14 has a communication function and can read data such as the voltage, current, and temperature of the loads 18, the energy storage device 12, and the power generation device 16 connected thereto, the power consumption of the loads 18, and the power generated by the power generation device 16, and transmit the data to a higher-level management system so that the higher-level management system can manage the data.

[0032] The upper management system may be an energy management device 10 having an energy management system (EMS), and the EMS can unifiedly control and manage the home energy system 100, for example, by controlling 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 by controlling the distribution device 14 to switch the power on / off state of the load 18, based on data information of the load 18 and the energy storage device 12 acquired by the distribution device 14.

[0033] The loads 18 of the home energy system 100 include all electrical consuming equipment in a home environment, including, but not limited to, lighting fixtures, refrigerators, ovens, range hoods, microwave ovens, rice cookers, washing machines, dryers, water heaters, electric heaters, televisions, computers, new energy vehicles, etc. Depending on the characteristics and uses of all the loads 18 in the home environment, the loads 18 are classified into multi-level loads 18 with different power consumption priorities. For example, depending on the degree of correlation between the power consumption demands of the loads 18 and the power consumption times, the loads 18 in the home environment can be classified into first and second loads with a higher power supply priority than the second load.

[0034] Here, the first load may be a non-time-shiftable load. A non-time-shiftable load is defined as a load whose power consumption is highly sensitive to real-time demands. For example, a refrigerator needs to be turned on throughout the day, cooking appliances such as rice cookers and range hoods need to be turned on during cooking periods every day, and lighting fixtures need to 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 whose power consumption is less sensitive to real-time demands. A time-shiftable load can be used during any period of the day without affecting the user's usage effect or experience. For example, a washing machine, dryer, water heater, or charging of a new energy vehicle. If the home energy system 100 includes an energy storage device 12, the energy storage device 12 is charged by the public power grid 20 or the power generation device 16. In this case, the energy storage device 12 can function as a time-shiftable load.

[0035] In one embodiment, the loads 18 of the home energy system 100 include lighting fixtures, refrigerators, ovens, range hoods, microwave ovens, rice cookers, washing machines, dryers, water heaters, electric heaters, air conditioners, televisions, computers, and new energy vehicles, the first loads include refrigerators, lighting fixtures, ovens, range hoods, microwave ovens, rice cookers, electric heaters, air conditioners, televisions, and computers, and the second loads include dryers, water heaters, electric heaters, and new energy vehicles.

[0036] The powered and power-off states of the loads 18 indicate whether the loads 18 and the power supply circuit of the power distribution device 14 are on or off. The loads 18 include loads 18 that are activated when powered on, such as refrigerators and water heaters, as well as loads 18 that require control to activate after being powered on. For example, washing machines and rice cookers are in standby mode after being powered on and require an operation, such as selecting an operating mode, to activate. When switching from a power-off state to a powered state, this type of load 18 must communicate with a controller within the load 18 via the EMS, and control the load 18 to activate. For loads 18 that do not have an internal controller, the EMS can control the load 18 to activate via an infrared device on the load 18.

[0037] For the control of the home energy system 100, see Figures 4 to 6. Regarding the electricity price of the public power grid, first, the electricity price of the public power grid for each period of the day is predicted. If the electricity price of the public power grid is not fixed, electricity price data of the public power grid for one day, three days ago, or a certain period is extracted, and the average value of each period is calculated to predict the electricity price of the public power grid for the corresponding period of the day. The electricity price of the public power grid includes the consumption price and the on-grid electricity price, and both can be predicted using past data.

[0038] In other embodiments, the power consumption price and the on-grid power price both have fixed power prices during each power consumption period of the day, in which case the power consumption price and the on-grid power price for that day can be obtained directly.

[0039] Regarding the loads 18, first, it is determined that a first load is a load that cannot be time-shifted and a second load is a load that can be time-shifted. The loads that cannot be time-shifted must be kept in an energized state during each period of the day so that the user can use them at any time. To meet the preset condition of the lowest electricity price, the loads that can be time-shifted are controlled to be in an energized state only during the period of the day when the electricity price is lowest, so that the user can use the loads that can be time-shifted during that period.

[0040] When predicting the power consumption of the first and second loads for each period of the user's day, power consumption data for each load 18 is extracted from one day, three days, or a fixed period, and the power consumption of each load 18 for each power consumption period is averaged to predict the first power consumption of the first load and the second power consumption of the second load for each power consumption period throughout the day. Because users' power consumption habits vary by season, the historical data referenced when predicting power consumption should not be too long. Furthermore, users' power consumption habits may differ between weekdays and weekends. Figure 4 shows the predicted power consumption of the first load for each period of the day, and Figure 5 shows the predicted power consumption of the first and second loads for each period of the day.

[0041] When predicting power consumption, for weekdays, power consumption can be predicted by extracting power consumption data for weekdays over a certain period in the previous fiscal year, and for holidays, power consumption data for holidays over a certain period in the previous fiscal year can be extracted and predicted, thereby improving prediction accuracy.

[0042] Similarly, the power generation of the power generation unit that cannot be time-shifted for one day is predicted based on the power generation of the power generation unit that cannot be time-shifted for a certain period in the previous period.

[0043] Predicted power generation After obtaining the first predicted power consumption and the second predicted power consumption, the net power of the home energy system for each power consumption period on the day can be obtained.

[0044] A day is divided into 12, 24, 48, 72, 144, and 288 periods, each of which is 2 hours, 1 hour, 30 minutes, 20 minutes, 10 minutes, and 5 minutes long, respectively. The corresponding power consumption price for each period can be obtained by averaging the power consumption prices for each period. The power consumption price for the user's i-th period is rbi (Price buy, the power consumption price for the i-th period), the on-grid power price for the user's i-th period is rsi (Price sell, the power selling price for the i-th period), the power consumption of the user's non-time-shiftable load for the i-th period is Pli1 (Power load, the power consumption of the non-time-shiftable load for the i-th period), and the power consumption of the user's time-shiftable load is Pli2 (Power load, the power consumption of the time-shiftable load for the i-th period). The non-time-shiftable generated power for the user's i-th period is Psi1 (Power source, the non-time-shiftable generated power for the i-th period).

[0045] As shown in Figure 6, the net power for the i-th period is Pi = (Pli1 + Pli2) - Psi1, and since the time-shiftable load consumes power only during the period when the power consumption price is lowest, Pli2 = 0 during the period when the power consumption price is higher than the lowest power consumption price, and in this case the net power is Pi = Pli1 - Psi1.

[0046] Pi>0 indicates that the total power consumption of the loads 18 in that period is greater than the non-time-shiftable generated power, and in order to minimize the power consumption expenditure, the power consumption price needs to be compared with the on-grid power price, and determine whether the home energy system 100 is powered by the energy storage device 12 or the public power grid 20.

[0047] Pi<0 indicates that the total power consumption of the loads 18 in that period is less than the non-time-shiftable generated power, and there is spare electrical energy in the non-time-shiftable generated power at that time. To maximize the revenue from selling electricity, it is necessary to compare the power consumption price with the on-grid electricity price and control the non-time-shiftable power generation device to output electrical energy to the energy storage device 12 or the public power grid 20.

[0048] If Pi=0, the non-time-shiftable generated power at this point matches the total consumed power, and no additional control is required.

[0049] In an embodiment of the present application, the preset condition is set so that the electricity fee is minimized. It is understood that in other embodiments, the preset condition is not limited to the electricity fee being minimized. For example, in one embodiment, the preset condition may be a condition that ensures that the power generation revenue is maximized.

[0050] Referring to FIG. 7, in some embodiments, the power price in each power consumption period of the public power grid 20 on the day includes a power consumption price and an on-grid power price, and step S103 includes the following steps:

[0051] In step S1031, the home energy system 100 is controlled to supply power from the energy storage device 12 during the power consumption period in which the power consumption price is higher than the on-grid power price.

[0052] In step S1032, the home energy system 100 is controlled to supply power from the public power grid 20 during the power consumption period in which the power consumption price is lower than the on-grid power price.

[0053] In this way, power consumption expenditure can be minimized to meet predetermined requirements.

[0054] Specifically, Pi>0 indicates that the total power consumption of the loads 18 during that period is greater than the non-time-shiftable generated power, and at that time, the energy storage device 12 may be used to supply power to some of the loads 18, or power may be supplied and used from the public power grid 20. In this case, the power consumption price must be compared with the on-grid power price.

[0055] During a power consumption period when the power consumption price is greater than the on-grid power price, supplying power from the public power grid 20 results in a high power consumption expenditure, and at this time, the energy storage device 12 is controlled to supply power to the power distribution device 14.

[0056] During a power consumption period when the power consumption price is lower than the on-grid power price, power consumption expenditure will be reduced if power is supplied from the public power grid 20, and the home energy system 100 can be controlled to supply power from the public power grid 20.

[0057] Referring to FIG. 8, in some embodiments, the electricity price in the electricity consumption period of the day on the public power grid 20 includes the on-grid electricity price, and step S105 includes the following steps.

[0058] In step S1051, if the net power of each power consumption period of the home energy system 100 on that day is less than zero, the power generation device that cannot be time-shifted is controlled to output electrical energy to the energy storage device 12.

[0059] In step S1052, the home energy system 12 is controlled to output electric energy to the public power grid 20 during the power consumption period when the on-grid power price is higher than the preset on-grid power price.

[0060] In this way, revenue from selling electricity can be maximized to meet the predetermined conditions.

[0061] Specifically, Pi<0 indicates that the total power consumption of the loads 18 in that period is less than the non-time-shiftable generated power, and there is surplus electrical energy in the non-time-shiftable generated power at that time. To maximize the revenue from selling electricity, when Pi<0, the surplus electrical energy is first stored in the energy storage device 12, and then sent to the public power grid 20 during the period when the on-grid electricity price is highest. When the period when Pi<0 is the period when the on-grid electricity price is highest, the electrical energy is directly output to the public power grid 20.

[0062] The preset on-grid electricity price can be the highest on-grid electricity price among the rankings of on-grid electricity prices in each period of the day, and at this time, outputting electrical energy to the public power grid 20 can obtain the maximum electricity sales revenue.

[0063] In one embodiment, there may be multiple periods of highest on-grid electricity prices in a day, and the system may select to output electrical energy to the public power grid 20 during the period of highest on-grid electricity prices that is closest to the current period.

[0064] The period with the highest on-grid electricity price is determined only from the current period to all remaining periods of the day. For example, if the on-grid electricity price is highest from 10:00 AM to 11:00 AM and the next highest from 2:00 PM to 3:00 PM for all periods of the day, then the period with the highest on-grid electricity price before 11:00 AM is from 10:00 AM to 11:00 AM. After 11:00 AM, the period with the highest on-grid electricity price is from 2:00 PM to 3:00 PM.

[0065] Referring to FIG. 9, in some embodiments, the power distribution device 14 is used to detect the power consumption of multiple loads 18 and the power generation of a non-time-shiftable power generation device, and step S101 includes the following steps:

[0066] In step S1011, the power consumption of the multiple loads 18 for each period on each day detected by the power distribution device 14 and the power generated by the power generation device that cannot be time-shifted are obtained and recorded as the historical power consumption of the multiple loads 18 for each period on each day and the historical power generated by the power generation device that cannot be time-shifted for each period on each day.

[0067] In step S1013, the power consumption and power generation for each power consumption period of the day are obtained based on the historical power consumption and historical power generation.

[0068] In this way, the power consumption data of the load 18 and the power generation data of the power generation device that cannot be time-shifted can be recorded by the power distribution device 14, allowing for detailed management according to the power supply and power consumption status of the home energy system.

[0069] Specifically, the power distribution device 14 is used to detect the power consumption of the loads 18 or the power generated by the power generation device that cannot be time-shifted, and the detected data is transmitted to the energy management device 10 for recording.The energy management device 10 can then predict the power consumption of the loads 18 and the power generated by the power generation device that cannot be time-shifted for the next 24 hours or for a certain period of time from the recorded power consumption of each load 18 and the power generated by the power generation device that cannot be time-shifted.

[0070] In one embodiment, the energy management device 10 can establish communication with the power distribution device 14 via a wired connection or a wireless connection. Here, a wired connection may refer to the energy management device 10 connecting to the power distribution device 14 using a tangible medium such as a metal conductor or an optical fiber to establish communication and thereby realize signal transmission. A wireless connection may refer to the energy management device 10 connecting to the power distribution device 14 via a method such as Wi-Fi, 4G, or Bluetooth® to establish communication and realize signal transmission. Specifically, when communication is established between the energy management device 10 and 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 total power consumption of all loads 18 by obtaining the power consumption of each load 18 via the power distribution device 14, and the total power generation of all non-time-shiftable power generation devices by obtaining the power generation power of each non-time-shiftable power generation device.

[0071] In some embodiments, each of the multiple loads 18 is classified as a first load or a second load, the energization priority of the first load is higher than the energization priority of the second load when the home energy system 100 is in an on-grid state, the electricity price of the public power grid 20 for each electricity consumption period of the day includes an electricity consumption price, and the control method for the home energy system 100 includes the following steps:

[0072] When the home energy system 100 is in an on-grid state, the distribution device 14 is controlled in accordance with the power consumption price so that all of the first loads remain in a powered state during each power consumption period, and the second load is controlled so that it is in a powered state during a power consumption period when the power consumption price is less than a first set value and is in a power-off state during a power consumption period when the power consumption price is greater than the first set value.

[0073] In this way, by controlling the loads 18 with higher priority to be energized preferentially according to the power consumption price for different periods, and by controlling the loads 18 with lower priority to be energized during periods when the power consumption price is low, it is possible to minimize electricity charges.

[0074] Specifically, when the energy storage device 12 is in a power outage, the power distribution device 14 must use the public power grid 20 for power supply.

[0075] The first load is controlled so as to maintain a power-on state during each power consumption period according to the power consumption price for each period of the day. The second load is controlled so as to be in a power-on state during a power consumption period when the power consumption price is lower than a first set value, and to be in a power-off state during a power consumption period when the power consumption price is higher than the first set value.

[0076] Further, among the first and second loads, the energization priority of each load or a related set of loads 18 can be reclassified, for example, the first loads include first priority loads and second priority loads, and the second loads include third priority loads and fourth priority loads, with the energization priorities of the first priority loads, second priority loads, third priority loads, and fourth priority loads decreasing sequentially.

[0077] In one embodiment, the first loads further include first priority loads and second priority loads. The second loads include third priority loads and fourth priority loads. During a period when the electricity price is higher than a first set value, the first priority loads and second priority loads can be controlled to be in an energized state, and the third priority loads and fourth priority loads can be controlled to be in an unenergized state. During a period when the electricity price is lower than the first set value, the third priority loads and fourth priority loads can be controlled to be in an energized state. The energization priority can represent the level of real-time power consumption of the loads 18. By controlling the loads 18 with low real-time power consumption to be turned on during a period when the electricity price is low, electricity bill expenditures can be effectively reduced.

[0078] In one embodiment, the first preset value is the lowest power consumption price of the day, i.e., the power distribution device 14 is controlled to energize the second load during the period corresponding to the lowest power consumption price and to deenergize the second load during the other periods, thereby minimizing the expenditure on electricity bills to meet the preset conditions.

[0079] In some embodiments, each of the plurality of loads 18 is configured with a respective importance, and the energization priority of a load 18 with a higher importance is higher than the energization priority of a load 18 with a lower importance. The control method includes the following steps.

[0080] In step S109, when the home energy system 100 is in an off-grid state and the energy storage device 12 is in a state where it can supply power, the distribution device 14 is controlled to supply power from the energy storage device 12, and the power on / off state of each of the multiple loads 18 is controlled according to the importance of each of the multiple loads 18.

[0081] As a result, when the amount of electricity in the energy storage device 12 is finite, the power on / off state of the load 18 can be controlled according to the power on priority of the load 18, and the operating time of the load 18 with a high power on priority can be extended.

[0082] Specifically, when the home energy system 100 is in an off-grid state and the energy storage device 12 is in a state where it can supply power, the power distribution device 14 is controlled so that power is supplied from the energy storage device 12 .

[0083] The importance of the load 18 may be set by the user or may be preset in the home energy system 100. The importance of the load 18 determines the energization priority of the load 18, and the energization priority of a load with a higher importance is higher than the energization priority of a load with a lower importance.

[0084] At this time, depending on the importance of the load 18, the load 18 with higher importance is controlled to be in a powered state and the load 18 with lower importance is controlled to be in a powered state, thereby saving the amount of power in the energy storage device 12 and extending the operating time of the load 18 with higher importance.

[0085] Referring to FIG. 10, in some embodiments, step S109 includes the following steps.

[0086] In step S1091, the remaining amount of power in the energy storage device 12 is acquired.

[0087] In step S1092, the power distribution device 14 is controlled to switch the loads 18 that are in a powered state among the plurality of loads 18 from low to high importance according to the remaining power amount and the importance of the plurality of loads 18, and the smaller the remaining power amount, the fewer the number of loads 18 that are in a powered state among the plurality of loads 18.

[0088] In this way, the power on / off state of the load 18 can be controlled according to the power on priority of the load 18 in an off-grid state, and it is possible to ensure that the load 18 with a high power on priority operates normally.

[0089] Specifically, in an off-grid state, the home energy system 100 cannot extract power from the public power grid 20, and at this time, the energy storage device 12 is an important power supply source. To ensure that the highly important loads 18 operate normally, when the remaining power of the energy storage device 12 is less than a first set power amount, the power distribution device 14 can be controlled to cut off all of the less important loads 18.

[0090] In one embodiment, the loads 18 of multiple levels of importance include first priority loads, second priority loads, third priority loads, and fourth priority loads, and the energization priorities of the loads 18 decrease sequentially. The fourth priority loads, third priority loads, and second priority loads are successively turned off as the remaining power level decreases. When the remaining power level of the energy storage device 12 is less than the first set power level, only the first priority loads are controlled to be turned off.

[0091] In one embodiment, the first set power amount is 20%. In another embodiment, the first set power amount may be set according to the number, power consumption, etc. of the most important load 18.

[0092] Referring to FIG. 11, in some embodiments, step S109 includes the following steps.

[0093] In step S1093, the remaining amount of power in the energy storage device 12 and the required operation time of the load 18 having a higher importance than the preset level are acquired.

[0094] In step S1094, the amount of operating power required for the requested operation time to maintain the load 18 having a level of importance higher than the preset level is acquired according to the requested operation time.

[0095] In step S1095, if the remaining power amount is smaller than the operating power amount, the loads 18 having a higher importance level than the preset level are controlled to be in a powered state, and the other loads are controlled to be in a powered-off state.

[0096] In this way, the power on / off state of the load 18 can be controlled according to the importance of the load 18 in an off-grid state, and it can be ensured that the load 18 with high importance remains in operation within the required operating time.

[0097] Specifically, in an off-grid state, in order to maintain the operation time of some of the highly important loads 18, the amount of operating power required to maintain the highly important loads 18 for the required operation time is calculated from the operating power and required operation time of the highly important loads 18, and if the remaining power in the energy storage device 12 is less than the amount of operating power, the distribution device 14 is controlled to cut off all other loads 18 and maintain the highly important loads 18 in a powered state. This ensures that the highly important loads 18 operate normally within the required operation time.

[0098] For example, the loads 18 may include first, second, and third priority loads, with their power-on priorities decreasing in order of importance from high to low. If the preset level is second priority, and the remaining power is less than the operating power, the first priority load is powered on, and the second and third priority loads are powered off. The preset levels can be set according to the user's needs.

[0099] Referring to FIG. 12, in some embodiments, step S109 includes the following steps.

[0100] In step S1096, the total power consumption of all the loads 18 in the power distribution device 14 that are in an energized state is obtained.

[0101] In step S1097, if the total power consumption is greater than the set power, the power distribution device 14 is controlled to sequentially switch the loads 18 that are in a powered state among the multiple loads 18 to a power-off state in order from least important to most important until the total power consumption becomes equal to or less than the set power.

[0102] In this way, the power on / off state of the loads 18 can be controlled in accordance with the importance of the loads 18 in an off-grid state, and it is ensured that power is supplied preferentially to the loads 18 with higher importance.

[0103] Specifically, in an off-grid state, the power on / off state of the loads 18 can be controlled according to the total power consumption of all the powered loads 18 and the importance of the loads 18 .

[0104] In one embodiment, the loads 18 have first priority loads and second priority loads, ordered from most important to least important. In this case, a set power is set, and if the total power consumption of all energized loads 18 on the power distribution device 14 is greater than the set power, the power distribution device 14 is controlled to keep the first priority loads energized and to de-energize the second priority loads.

[0105] In one embodiment, the loads 18 include first priority loads, second priority loads, and third priority loads, which are listed in order of importance from most important to least important. The energization priorities of the first priority loads, second priority loads, and third priority loads decrease sequentially. In this case, if a set power is set and the total power consumption of all energized loads 18 on the power distribution device 14 is greater than the set power, the power distribution device 14 is controlled to keep the first priority loads energized and to deenergize the second priority loads and the third priority loads.

[0106] In one embodiment, the loads 18 include first priority loads, second priority loads, and third priority loads, ordered from most important to least important. Two power settings, a first set power and a second set power, are set, with the first set power being lower than the second set power. Thus, when the total power consumption of all the energized loads 18 reaches the first set power, the power distribution device 14 is controlled to turn off the third priority load 18 while keeping the first and second priority loads 18 energized. When the total power consumption of all the energized loads 18 reaches the second set power, the power distribution device 14 is controlled to turn off the second and third priority loads while keeping the first priority load energized.

[0107] In addition, when the load 18 has three or more loads 18 with different energization priorities and there are three or more set powers, the loads 18 with different priorities can all be controlled according to the above method.

[0108] In some embodiments, the importance of the loads is set by default by the home energy system and / or by user input commands.

[0109] In this way, the importance of the load 18 can be set according to the user's needs.

[0110] Specifically, the importance of the load 18 may be set by default by the home energy system 100, and may be set, for example, depending on the level of power consumption demand of the load 18 under normal circumstances. Alternatively, the importance of the load 18 may be set by a user's input command. The importance of the load 18 may be set depending on the user's usage needs and preferences. For example, if a user needs to keep a personal computer running 24 hours a day, the importance of the personal computer may be set to the highest. For example, if a user does not need to use cooking appliances, the importance of all cooking appliances may be set to the lowest. Alternatively, the power priority of the load 18 may be partially set by default by the home energy system 100 and partially set by the user.

[0111] In some embodiments, when the remaining power of energy storage device 12 is less than the second set amount of power, energy storage device 12 is in a power-disabled state.

[0112] When the remaining amount of power in the energy storage device 12 is greater than the second set amount of power, the energy storage device 12 is in a state where it can supply power.

[0113] In this way, it is determined whether the energy storage device 12 is in a state where it can supply power based on the remaining power level of the energy storage device 12.

[0114] Specifically, when the remaining power of the energy storage device 12 is smaller than the second set power amount, the energy storage device 12 is in a power supply unavailable state, and in this case, 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 amount, the energy storage device 12 can be controlled to supply power to the load 18. Alternatively, in an off-grid state, the energy storage device 12 has a sufficient amount of power to be used. The second set power amount is set by default by the system or according to the user's needs. In one embodiment, the second set power amount is 20%, and when the remaining power of the energy storage device 12 is less than 20%, the energy storage device 12 is in a power supply unavailable state. The first set power amount may be the same as the second set power amount or may be set separately.

[0115] As described above, in an on-grid state, the energy storage device 12, the power generation device 16, and the loads 18 in the home energy system 100 are controlled to optimize the electricity rate according to the power generation, power consumption, and public power grid price. In an off-grid state, it is necessary to control the switches of the loads 18 with different levels of importance, ensuring that the more important loads 18 can maintain operation for a longer period of time with a limited amount of power consumption. In the above-described manner, the energy storage device 12, the power generation device 16, and each load 18 connected to the home energy system 100 are managed using the power distribution device 14, thereby supporting the user in fine-tuned management of the loads 18 of the home energy system 100.

[0116] Referring to Figures 2 and 3, a home energy system 100 according to an embodiment of the present application includes an energy management device 10, a power distribution device 14 connected to a plurality of loads 18, a non-time-shiftable power generation device, and an energy storage device 12, and the energy management device 10 is electrically connected to the power distribution device 14, the non-time-shiftable power generation device, and the energy storage device 12.

[0117] The energy management device 10 is used to realize the control method for the home energy system 100 described in any of the above embodiments.

[0118] Specifically, the energy management device 10 can perform unified control of power supply and power consumption for the home energy system 100, and can, for example, control the power distribution device 14 to supply power from the energy storage device 12, or control the power distribution device 14 to supply power from the public power grid 20. Alternatively, the energy management device 10 can control the power distribution device 14 to send 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 turn on or off loads with different priorities.

[0119] The home energy system 100 includes loads 1, 2, ..., and n that can be classified into non-time-shiftable loads (first loads) and time-shiftable loads (second loads) in an on-grid state. In an off-grid state, loads 1, 2, ..., and n can be classified into multiple loads with different levels of importance.

[0120] The energy management device 10 can also be connected to a user's terminal equipment, such as a user's mobile phone, and after the user's mobile phone installs a corresponding application program, the energy management device 10 can receive information including the power consumption time of loads 18 with different priorities, the number and names of loads 18 currently in an energized state, etc. Terminal equipment includes, but is not limited to, smartphones, tablets, wearable smart devices, etc.

[0121] In one embodiment, the energy management device 10 can perform a power consumption plan for the next 24 hours. First, the energy management device 10 predicts the power consumption price and on-grid power price for the next 24 hours based on the historical power consumption price and the historical on-grid power price, and at the same time, because there is a high correlation between the power consumption demand and the power consumption period of the non-time-shiftable load, the energy management device 10 can more accurately predict the power consumption of the non-time-shiftable load within the next 24 hours. Therefore, the energy management device 10 can plan the power consumption period of the time-shiftable load based on the power consumption price, on-grid power price, and the power consumption of the non-time-shiftable load for the next 24 hours, and can transmit the power consumption period to the user's terminal equipment.

[0122] 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 from the first energy management device, and if the second energy management device does not receive a response signal, the second energy management device takes over from the first energy management device.

[0123] In this way, by providing a spare energy management device, the home energy system 100 can be made more stable.

[0124] 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 from the first energy management device, the second energy management device can determine that the first energy management device is abnormal (e.g., downtime, etc.), and can take over the work of the first energy management device. In other words, in this case, the second energy management device can obtain the power consumption of the load 18 and the power generated by the power generation device that cannot be time-shifted, and can be used to realize the control method of the home energy system 100 described in any one of the above embodiments, thereby preventing the problem of the power distribution system becoming inoperable when the first energy management device is abnormal, and improving the stability of the home energy system 100.

[0125] In another embodiment, the first energy management device and the second energy management device can detect each other to determine whether the other's operating status is normal. For example, one of the first energy management device and the second energy management device transmits a detection signal to the other and receives a response signal returned from the other, and the response signal is used to determine whether the other of the first energy management device and the second energy management device is abnormal.

[0126] In some embodiments, power distribution device 14 includes at least one of a smart receptacle, a smart plug, or a smart air switch.

[0127] This allows the energy management device 10 to acquire the power consumption of each load 18 and the power generated by each power generation device that does not allow time shifting, and to manage these in detail.

[0128] 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 / off state of the loads 18 and can control the supply of power to the home energy system 100 via any 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 receptacle, a smart plug, a smart air switch, or other device having a control module and a communication module therein and capable of controlling the equipment connected thereto. The power distribution device 14 has a communication function and reads data such as the voltage, current, and temperature of the loads 18, the energy storage device 12, and the power generation device 16 connected thereto, the power consumption of the loads 18, and the power generated by the power generation device 16, and transmits the data to the energy management device 10. The energy management device 10 can then finely manage the loads 18 and the power generation devices that do not support time shifting in the home energy system 100.

[0129] Referring to FIG. 3, the energy management device 10 according to an embodiment of the present application includes a first processor 28 and a first memory 30 that stores a computer program that, when executed by the first processor 28, realizes steps of the home energy system control method according to any of the above embodiments.

[0130] The power distribution device 14 according to an embodiment of the present application is used to communicate with the energy management device 10 .

[0131] 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 power on / off state of a corresponding one of the loads 18. The controller receives a control command sent from the energy management device 10 and controls the corresponding switch 36 according to the control command to control the power on / off state of the corresponding load 18. The controller 40 includes a second processor 32 and a second memory 34. In this case, when the power distribution device 14 is powered by the energy storage device 12, the circuit is as shown in FIG. 13.

[0132] When the power distribution device 14 is connected to the energy storage device 12 and the non-time-shiftable power generation device, the power distribution device 14 can acquire information such as the power supply from the energy storage device 12 and the power generated by the non-time-shiftable power generation device and transmit it to the controller, and can control the power supply to the home energy system from the energy storage device 12 and the non-time-shiftable power generation device in response to a command from the controller. The power distribution device 14 can also control the non-time-shiftable power generation device to charge the energy storage device 12 in response to a command from the controller.

[0133] In one embodiment, the controller is controlled by an energy management device 10 connected to the home energy system 100, receives control commands sent from the energy management device 10, and controls the corresponding switches according to the control commands to control the power on / off state of the corresponding loads 18.

[0134] In one embodiment, the controller can independently perform the steps of the method for controlling the home energy system 100 described above to control the power supply and power consumption of the home energy system 100 .

[0135] A computer-readable storage medium according to an embodiment of the present application stores a computer program that, when executed by a processor, implements the steps of the home energy system control method according to any of the embodiments.

[0136] Specifically, the processor may be the first processor 28 of the energy management device 10 or may be a processor of another device or facility.

[0137] The above-mentioned home energy system 100, energy management device 10, power distribution device 14, and computer-readable storage medium can control the power on / off state of the loads 18 connected to the power distribution device 14 according to the power supply state of the energy storage device 12 and the priority of the loads 18 when the power distribution device 14 is supplied with power from different power sources, thereby realizing control of each load 18 in the home power grid and assisting users in finely managing the loads 18.

[0138] It should be noted that the above-described embodiments and beneficial effects of the home energy system control method also apply to the home energy system 100, energy management device 10, power distribution device 14, and computer-readable storage medium used in the embodiments of the present application, and detailed descriptions thereof will be omitted here to avoid redundancy.

[0139] In one embodiment, when the computer program is executed by a processor, the steps of the method for controlling a home energy system that are realized include the following steps.

[0140] In step S101, when the home energy system 100 is in an on-grid state and the power generation device that cannot be time-shifted is in a state where it can supply power, the power consumption of the multiple loads 18 for each power consumption period of the day and the predicted power generation power of the power generation device that cannot be time-shifted are obtained.

[0141] In step S103, if the net power, which is the difference between the predicted power generation and predicted power consumption of the home energy system 100 for each power consumption period of the day, is greater than zero, the power supply from the energy storage device 12 of the home energy system 100 or the power supply from the public power network 20 is controlled in accordance with the power price for each power consumption period of the day on the public power network 20 so that the electricity rate satisfies the predetermined condition.

[0142] In step S105, if the net power of the home energy system 100 for each power consumption period of the day is less than zero, control is performed to output electrical energy from the power generation device that cannot be time-shifted to the energy storage device 12 or the public power grid 20 so that the electricity rate meets the predetermined conditions according to the power price for each power consumption period of the day.

[0143] It will be understood that a computer program includes computer program code. The computer program code may be in source code format, object code format, an executable file, or some kind of intermediate format, etc. A computer-readable storage medium may include any entity or device capable of carrying computer program code, such as a recording medium, a USB memory, a removable hard disk, a magnetic disk, an optical disk, computer memory, a read-only memory (ROM), a random access memory (RAM), and a software distribution medium. The processor may be a central processor or another general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc.

[0144] In the description of this application, references to "one embodiment," "some embodiments," "exemplary embodiments," "examples," "particular examples," or "some examples" mean that a particular feature, structure, material, or characteristic described in connection with at least one embodiment or example of this application is included in at least one embodiment or example of this application. In this specification, general references to the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

[0145] From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment methods may be realized in the form of software plus a required general-purpose hardware platform, and of course, hardware is also possible, but in many cases the former is a more preferable embodiment. Based on this understanding, the essential technical aspects of the present application or the parts that contribute to the prior art may be embodied in the form of a software product, and the software product is stored in one storage medium such as the above (e.g., ROM / RAM, magnetic disk, optical disk), and includes several instructions for causing one terminal device (which may be a mobile phone, computer, server, air conditioner, network device, etc.) to execute the methods of various embodiments of the present application.

[0146] Although examples of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not limiting of the present application, and that those skilled in the art may change, modify, substitute, and vary the above examples within the scope of the present application. [Explanation of symbols]

[0147] 100 Home Energy Systems 10 Energy management device 12 Energy storage devices 14 Power distribution equipment 16 Power generating equipment 18 Load 20 Public Power Grid 22 Photovoltaic modules 24 Wind power generation modules 26 Fuel Power Generation Module 28 First Processor 30 First Memory 32 Second Processor 34 Second Memory 36 Switch 38 Power Supply Circuit 40 Controller

Claims

1. A method for controlling a home energy system including a power distribution device connected to a plurality of loads, a non-time-shiftable power generation device, and an energy storage device, comprising: When the home energy system is in an on-grid state and the power generation device that cannot be time-shifted is in a power supply capable state, acquiring the power consumption of the plurality of loads and the power generation of the power generation device that cannot be time-shifted in each power consumption period of the day; When a net power, which is a difference obtained by subtracting the generated power from the consumed power in each power consumption period of the home energy system on that day, is greater than zero, controlling the power supply from the energy storage device of the home energy system or the power supply from the public power grid in accordance with the power price in each power consumption period of the day so that the electricity rate satisfies a preset condition; When the net power of the home energy system in each power consumption period of the day is less than zero, controlling the power generation device that cannot time-shift to output electric energy to the energy storage device or the public power grid according to the power price in each power consumption period of the day so that the electricity price satisfies the preset condition; the electricity price includes a power consumption price and an on-grid electricity price, and the electricity fee is the power consumption price minus the on-grid electricity price; A home energy system control method, wherein the predetermined condition is that the electricity fee is minimized.

2. The step of controlling the power supply by the energy storage device of the home energy system or the power supply by the public power grid so that the electricity rate satisfies a predetermined condition according to the electricity price of the public power grid for each electricity consumption period of the day, comprises: controlling the home energy system to supply power from the energy storage device during an electricity consumption period when the electricity consumption price is greater than the on-grid electricity price; and controlling the home energy system to supply power from the public power grid during a power consumption period in which the power consumption price is lower than the on-grid power price.

3. The step of controlling the output of electrical energy from the non-time-shiftable power generation device to the energy storage device or the public power grid in accordance with the electricity rates for each power consumption period of the day so that the electricity rates satisfy the predetermined conditions, comprises: When the net power of each power consumption period of the home energy system on that day is less than zero, controlling the power generation device that cannot time shift to output electrical energy to the energy storage device; and controlling the home energy system to output electric energy to the public power grid during an electric power consumption period in which the on-grid electricity price is greater than a predetermined on-grid electricity price.

4. the power distribution device is used to detect the power consumption of the plurality of loads and the power generated by the non-time-shiftable power generation device; The step of acquiring the power consumption of the plurality of loads and the power generation of the power generation device that cannot be time-shifted in each power consumption period of the day includes: acquiring the power consumption of the plurality of loads for each period of each day and the power generated by the power generation device that cannot be time-shifted, detected by the power distribution device, and recording them as historical power consumption of the plurality of loads for each period of each day and the historical power generated by the power generation device that cannot be time-shifted for each period of each day; and acquiring the power consumption and power generation for each power consumption period of the day based on the historical power consumption and the historical power generation.

5. Each of the plurality of loads is classified as a first load or a second load, and a power-on priority of the first load is higher than a power-on priority of the second load when the home energy system is in an on-grid state; The method for controlling a home energy system includes:

2. The home energy system control method of claim 1, further comprising the steps of: when the home energy system is in an on-grid state, controlling the power distribution device so that all of the first loads remain powered during each power consumption period according to the power consumption price; controlling the second load so that it is powered during a power consumption period when the power consumption price is less than a first set value; and controlling the second load so that it is powered during a power consumption period when the power consumption price is greater than the first set value.

6. Each of the plurality of loads is configured to have a degree of importance, and a power-on priority of a load with a higher degree of importance is higher than a power-on priority of a load with a lower degree of importance; The control method includes:

2. The home energy system control method according to claim 1, further comprising the steps of: when the home energy system is in an off-grid state and the energy storage device is in a state where it can supply power, controlling the power distribution device to supply power from the energy storage device; and controlling the power on / off states of the plurality of loads according to the importance of each of the plurality of loads.

7. When the home energy system is in an off-grid state and the energy storage device is in a state where it can supply power, the step of controlling the power distribution device to supply power from the energy storage device and controlling the power on / off states of the plurality of loads according to the importance of each of the plurality of loads includes: acquiring a remaining amount of power of the energy storage device; 7. The home energy system control method of claim 6, further comprising the step of controlling the power distribution device to switch the powered loads among the plurality of loads to a power-off state in order from a load with a lower importance to a load with a higher importance, depending on the remaining amount of power and the importance of the plurality of loads, so that the fewer the remaining amount of power is, the fewer the number of powered loads among the plurality of loads will be.

8. When the home energy system is in an off-grid state and the energy storage device is in a state where it can supply power, the step of controlling the power distribution device to supply power from the energy storage device and controlling the power on / off states of the plurality of loads according to the importance of each of the plurality of loads includes: Obtaining the remaining power amount of the energy storage device and the required operation time of the load having a higher importance than a preset level; obtaining, according to the requested operation time, an amount of operating power required to maintain, within the requested operation time, a load having a level of importance higher than a preset level; The control method for a home energy system according to claim 6, further comprising a step of controlling, when the remaining power amount is smaller than the operating power amount, loads whose importance is higher than a predetermined level to be energized and other loads to be de-energized.

9. When the home energy system is in an off-grid state and the energy storage device is in a state where it can supply power, the step of controlling the power distribution device to supply power from the energy storage device and controlling the power on / off states of the plurality of loads according to the importance of each of the plurality of loads includes: obtaining a total power consumption of all energized loads on the power distribution device; 7. The home energy system control method of claim 6, further comprising the step of: if the total power consumption is greater than a set power, controlling the power distribution device to sequentially switch the plurality of loads that are in a powered state to a power-off state in order from least important to most important until the total power consumption becomes equal to or less than the set power.

10. The method for controlling a home energy system according to claim 6, wherein the importance of the plurality of loads is set by default by the home energy system and / or set by a user's input command.

11. An energy management device, a first processor; An energy management device comprising: a first memory that stores a computer program that, when executed by the first processor, realizes the steps of the home energy system control method described in claim 1.

12. 12. A home energy system comprising: an energy management device as described in claim 11; a power distribution device connected to a plurality of loads; 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.

13. 13. The home energy system of claim 12, wherein the power distribution device includes at least one of a smart receptacle, a smart plug, or a smart air switch.

14. A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the home energy system control method of claim 1.

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