A power supply control method and system

Abstract

The application provides a power supply control method and system. The method comprises the following steps: obtaining a state schedule table of an energy storage system in a current period; the state schedule table comprises respective energy storage system states corresponding to different time periods in the current period, and the energy storage system states comprise an anti-flow failure state, a grid power taking state, a self-generation and self-use state and an electric energy sharing state; performing corresponding power supply control according to the energy storage system state corresponding to the current time period; collecting operation data of the energy storage system, and changing the energy storage system state corresponding to the current time period when the operation data meets a specified state switching condition; obtaining a state actual table of the current period after completing a complete period; and updating a state schedule table of a next period according to an adjustment rule according to the state actual table. The application provides an anti-flow power control scheme which is safe, economical and intelligently operated.

Description

Technical Field

[0001] This application relates to the field of distributed generation and energy storage, and more specifically, to a power supply control method and system. Background Technology

[0002] Grid-connected backflow prevention usually refers to the technology or measures to prevent electricity from flowing back into the grid from the user side when a distributed generation and energy storage system (such as solar photovoltaic or wind power) is connected to the grid.

[0003] Energy storage sharing is a way to share energy storage with neighbors. Neighbors' loads can be powered by the energy storage, generating profit for the user. The price neighbors pay for electricity from the storage is significantly lower than the price they pay from the grid. The core issue affecting the value of an energy storage system is when to store photovoltaic energy for self-consumption and when to sell it to neighbors.

[0004] Therefore, this application provides a power supply control method and system to solve one of the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this application is to provide a power supply control method and system that can solve at least one of the aforementioned technical problems. The specific solution is as follows:

[0006] According to a specific embodiment of this application, in a first aspect, this application provides a power supply control method applied to a distributed generation and energy storage system including an energy storage power source, a photovoltaic panel, a home-side distribution box, a neighbor-side distribution box, at least two smart meters, a relay, and a power grid, comprising:

[0007] Obtain the state plan table of the energy storage system for the current cycle; wherein, the state plan table includes the energy storage system state corresponding to different time periods within the current cycle, and the energy storage system state includes anti-reverse current failure state, grid power supply state, self-consumption state, and power sharing state; execute the corresponding power supply control according to the energy storage system state corresponding to the current time period; collect the operating data of the energy storage system, and change the energy storage system state corresponding to the current time period when the operating data meets the specified state switching conditions; after completing a complete cycle, obtain the actual state table for the current cycle; based on the actual state table, update the state plan table for the next cycle according to the adjustment rules.

[0008] In one implementation, each cycle is defined as a day, and each time period is defined as an hour.

[0009] In one embodiment, the current cycle state plan table is obtained as follows: in response to the initial power-on of the energy storage system, a pre-configured default actual state table is obtained as the current cycle state plan table; in response to the energy storage system not being powered on for the first time, an updated state plan table based on the actual state table of the previous cycle is obtained.

[0010] In one implementation, each time period in the default state actual table is uniformly defined as corresponding to the self-initiated and self-used state.

[0011] In one embodiment, the specified state switching condition is one of the following: anti-reverse current failure condition, grid power supply condition, and self-consumption condition; the anti-reverse current failure condition is that after the photovoltaic panel is fully charged with the energy storage power supply, there is still residual output power; the grid power supply condition is that the battery state of charge of the energy storage power supply is lower than a set discharge stop threshold; the self-consumption condition is that the battery state of charge of the energy storage power supply is higher than the sum of the discharge stop threshold and a preset deviation value.

[0012] In one embodiment, the adjustment rules include: for time periods marked as anti-reverse flow failure in the actual status table, adjusting the previous and most recent non-power sharing status time period to power sharing status; for time periods marked as grid power taking status in the actual status table, adjusting the previous and most recent power sharing status time period to self-consumption status.

[0013] In one embodiment, the step of executing the corresponding power supply control according to the energy storage system state of the current time period includes: determining the control instruction set corresponding to the energy storage system state of the current time period according to a predefined state action lookup table; and executing the control instruction set to control the operation of the photovoltaic panel, the energy storage power supply, and the relay.

[0014] In one embodiment, executing the control command set includes: responding to the energy storage system state corresponding to the current time period being grid-connected, controlling the photovoltaic panel to output normally, controlling the relay to be in the energized state, and controlling the energy storage power supply to stop outputting externally; responding to the energy storage system state corresponding to the current time period being self-consumption state, controlling the photovoltaic panel to output normally, controlling the relay to be in the energized state, and matching the load power supply based on the data of the home's smart meter; responding to the energy storage system state corresponding to the current time period being anti-reverse current failure state, controlling the photovoltaic panel to stop outputting, controlling the relay to be in the energized state, and matching the load power supply based on the data of the home's smart meter; responding to the energy storage system state corresponding to the current time period being energy sharing state, controlling the photovoltaic panel to output normally, controlling the relay to be in the de-energized state, and matching the load power supply based on the data of the main smart meter; wherein, the main smart meter is installed on the circuit between the energy storage power supply and the grid, and is used to measure the power consumption of the home's and neighbors' loads; the home's smart meter is installed at the connection point between the energy storage power supply and the main smart meter, and is used to measure the power consumption of the home's load.

[0015] According to a specific embodiment of this application, in a second aspect, this application provides a power supply control system for implementing the method of any one of the first aspects, comprising:

[0016] An energy storage power source is used to store photovoltaic energy and supply power to the load; a photovoltaic panel is connected to the energy storage power source for charging; a home-side distribution box is connected to the home's load; a main smart meter is installed on the circuit between the energy storage power source and the power grid to measure the power consumption of the home's and neighbors' loads; a home-side smart meter is installed at the connection point between the energy storage power source and the main smart meter to measure the power consumption of the home's load; a relay is installed between the power grid and the home-side distribution box, controlled by the energy storage power source to connect or disconnect from the power grid; a communication module includes a first communication circuit and a second communication circuit, respectively connected to the energy storage power source and the home-side smart meter and the main smart meter; a control module is integrated into the energy storage power source and configured to perform reading and updating of the status plan table or the status actual table, as well as to perform power supply control.

[0017] According to a specific embodiment of this application, in a third aspect, this application provides a computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the processor performs the steps of the method as described in any of the first aspects.

[0018] Compared with the prior art, the above-described solution of this application has at least the following beneficial effects: This application provides a power supply control method that predefines the operating mode of the energy storage system by introducing a time-segmented state plan table, thereby achieving planned and predictable power supply control. This method transforms reactive, passive control into proactive, forward-looking management. It enables the system to dynamically and automatically switch smoothly between four key states, thereby systematically optimizing the energy distribution strategy while strictly ensuring backflow prevention safety. The ultimate goal is to maximize the self-consumption of photovoltaic energy and create higher economic value for users. Attached Figure Description

[0019] Figure 1 A flowchart of a power supply control method is shown;

[0020] Figure 2 A schematic diagram of a process for performing power supply control within one cycle is shown;

[0021] Figure 3 A unit block diagram of a power supply control system according to an embodiment of this application is shown. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0024] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0025] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of this application, and similarly, second may also be referred to as first.

[0026] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0027] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0028] It should be noted that any symbols and / or numbers present in the specification that are not marked in the accompanying drawings are not reference numerals.

[0029] The optional embodiments of this application are described in detail below with reference to the accompanying drawings.

[0030] The embodiments provided in this application are embodiments of a power supply control method.

[0031] The following is combined Figure 1 The embodiments of this application will be described in detail.

[0032] Figure 1 A flowchart of a power supply control method is shown, which is applied to a distributed generation and energy storage system including an energy storage power source, a photovoltaic panel, a home-side distribution box, a neighbor-side distribution box, at least two smart meters, a relay and a power grid, including the following steps S101-S104.

[0033] As the intelligent transportation hub and safety commander of the entire home energy system, the distribution box is used to distribute the total electrical energy from the power grid or power generation system to various branch circuits in the home (various loads, such as lighting, air conditioning, refrigerator, charging piles, etc.), and automatically cut off the circuit in case of excessive current or short circuit through circuit breakers and fuses.

[0034] Step S101: Obtain the state plan table of the energy storage system in the current cycle.

[0035] The status plan table includes the status of the energy storage system for different time periods within the current cycle. The energy storage system status includes the reverse current failure status, grid power supply status, self-consumption status, and energy sharing status.

[0036] The reverse flow failure state refers to the situation where, after the photovoltaic system meets the real-time electricity demand of the user's own load and the charging demand of the energy storage power supply, there is still surplus power. The surplus power has nowhere to be consumed and there is a risk of reverse flow into the public power grid.

[0037] The term "grid power draw status" refers to a situation where the state of charge of the energy storage power source is lower than a preset discharge stop threshold, and the power generation from the photovoltaic panels is insufficient to cover the load demand, requiring supplementary power draw from the public grid.

[0038] Self-consumption mode refers to the following: when the photovoltaic panel generates electricity normally, the user's smart meter monitors its own load demand in real time, and prioritizes the precise matching and supply of photovoltaic power to these loads. Any surplus will automatically charge the energy storage power source.

[0039] The state of electricity sharing refers to the following: when the photovoltaic panel is generating electricity normally, after meeting its own load demand and the charging demand of the energy storage power supply, the load demand of the neighbors is monitored in real time by the main smart meter (including data from the user side and the neighbor side), and the electricity is supplied to the neighbor's load in a targeted manner.

[0040] In some embodiments, each cycle is defined as a day, and each time period is defined as an hour. For ease of understanding, the states of various energy storage systems are distinguished based on numerical values ​​and reflected in the state plan table. Table 1 below shows a specific state plan table.

[0041] Table 1

[0042]

[0043] Among them, 0 is defined as the anti-reverse current failure state (the photovoltaic output needs to be stopped), 1 is defined as the grid power supply state (at this time, the user needs to buy electricity from the grid to supply the household load or charge the energy storage power supply), 2 is defined as the self-consumption state (matching the household load of the user who has installed the energy storage power supply), and 3 is defined as the energy sharing state (at this time, energy needs to be provided to other households).

[0044] Step S102: Execute the corresponding power supply control according to the energy storage system status of the current time period.

[0045] The current cycle's plan table is obtained in the following way: it is determined whether the energy storage system is powered on for the first time. If so, the pre-configured default state actual table is obtained as the current cycle's state plan table; otherwise, the state plan table updated based on the previous cycle's state actual table is obtained as the current cycle's state plan table.

[0046] The default state can be uniformly defined as the self-initiated and self-used state for each time period in the actual table, as shown in Table 2 below.

[0047] Table 2

[0048]

[0049] The specific implementation of the corresponding power supply control includes: determining the control instruction set corresponding to the current state of the energy storage system based on a predefined state action lookup table; and executing the control instruction set to control the operation of the photovoltaic panel, the energy storage power supply, and the relay.

[0050] Specifically, when the energy storage system is in grid-connected power supply mode, the photovoltaic panel is controlled to output normally, the relay is controlled to be engaged, and the energy storage power supply is controlled to stop outputting power to the outside world. When the energy storage system is in self-consumption mode, the photovoltaic panel is controlled to output normally, the relay is controlled to be engaged, and the power supply is matched to the load based on the data from the smart meter on the home side. When the energy storage system is in reverse current failure mode, the photovoltaic panel is controlled to stop outputting power, the relay is controlled to be engaged, and the power supply is matched to the load based on the data from the smart meter on the home side. When the energy storage system is in energy sharing mode, the photovoltaic panel is controlled to output normally, the relay is controlled to be disengaged, and the power supply is matched to the load based on the data from the main smart meter.

[0051] The main smart meter is installed on the circuit between the energy storage power source and the power grid to measure the power consumption of the loads of the user's own and neighbor's households; the home-side smart meter is installed at the connection point between the energy storage power source and the main smart meter to measure the power consumption of the user's own loads.

[0052] As a specific embodiment, the state action comparison table is shown in Table 3 below.

[0053] Table 3

[0054]

[0055] As shown in Table 3, the state-action lookup table is defined based on the state values ​​in the aforementioned state plan table, including "0" to "3", corresponding to the reverse current failure state, grid power intake state, self-consumption state, and power sharing state, respectively. For each state, the table defines specific actions to instruct the system to perform actions according to the expected results.

[0056] Step S103: Collect the operating data of the energy storage system, and change the state of the energy storage system in the current period when the operating data meets the specified state switching conditions.

[0057] The specified state switching conditions include one of the following: anti-reverse current failure condition, grid power supply condition, and self-consumption condition. The anti-reverse current failure condition is that after the photovoltaic panel is fully charged with the energy storage power supply, there is still residual output power; the grid power supply condition is that the state of charge of the energy storage power supply is lower than the set discharge stop threshold; the self-consumption condition is that the state of charge of the energy storage power supply battery is higher than the sum of the discharge stop threshold and the preset deviation value.

[0058] The discharge stop threshold and preset deviation value can be set according to the actual situation of the energy storage power supply. For example, the discharge stop threshold can be set to 10% and the preset deviation value can be set to 10%.

[0059] During the power supply control process according to the status plan, the operation data of the energy storage system is collected in real time, and it is determined in real time whether the anti-reverse failure condition, grid power supply condition, and self-consumption condition are met in the current period. After determining that a certain condition is met, the update of the energy storage system status is triggered.

[0060] For example, if the photovoltaic panel is fully charged with the energy storage power supply during the current time period, and there is still residual output power, it indicates that the anti-reverse current failure condition is met, and the energy storage system status for the current time period is changed to the anti-reverse current failure status. Taking Table 2 above as an example, if the operating data is found to meet the anti-reverse current failure condition at 4:15 in time period "4", the status value corresponding to time period "4" is updated to "0".

[0061] Step S104: After completing a full cycle, obtain the actual state table for the current cycle; based on the actual state table, update the state plan table for the next cycle according to the adjustment rules.

[0062] The adjustment rules include: 1) For time periods marked as anti-reverse flow failure in the actual status table, adjust the previous and most recent non-power sharing status time period to power sharing status; 2) For time periods marked as grid power taking status in the actual status table, adjust the previous and most recent power sharing status time period to self-consumption status.

[0063] When searching based on rule 1) or rule 2), the actual status table is regarded as a time loop with the beginning and end connected. If a time period that meets the rule is not found when searching from right to left to the first time period, the search can be continued from the last time period (the rightmost one).

[0064] In some specific embodiments, taking Table 1 as an example, the update based on rule 1) can be to find the most recent time period before time period "14" whose corresponding state value is not "3", such as time period "13", and update its corresponding state value to "3", so as to control the execution of power sharing in time period "13" of the next cycle, reduce the possibility of anti-reverse failure in time period "14" of the next cycle, and improve the photovoltaic utilization rate. The update based on rule 2) can be to find the most recent time period before time period "6" whose corresponding state value is "3". Since there is no time period with a state value of "3" before time period "6", the search continues from time period "24" until time period "18" is found, and the state value corresponding to time period "18" is updated to "2".

[0065] The dual optimization mechanism of "real-time update" (step S103) and "optimization adjustment" (step S104) obtains the state plan table for the next cycle, which is key to achieving efficient adaptive control. The "real-time update" stage ensures the system's rapid response to unexpected situations (such as sudden cloudy weather or load surges), guaranteeing the real-time nature and safety of control. The "optimization adjustment" stage performs global optimization at the end of each cycle, avoiding frequent policy fluctuations caused by temporary or sporadic events. This results in a more comprehensive and representative state plan table, guiding the system to execute a better energy scheduling plan in the next cycle.

[0066] In this embodiment, a time-segmented state plan table is introduced to predefine the operating mode of the energy storage system, achieving planned and predictable power supply control. This method transforms reactive, passive control into proactive, forward-looking management. It enables the system to dynamically and automatically switch smoothly between four key states: anti-reverse current failure, grid power intake, self-consumption, and energy sharing. This systematically optimizes the energy allocation strategy while strictly ensuring anti-reverse current safety, ultimately maximizing the self-consumption of photovoltaic energy and creating higher economic value for users.

[0067] Figure 2 A schematic diagram of a power supply control process performed within one cycle is shown, such as... Figure 2 As shown, the process includes the following steps S201 to S214. It should be noted that the entire process presents only one state table, namely the state plan table.

[0068] Step S201: Determine if it is the first power-on. If yes, proceed to step S202; otherwise, proceed to step S203.

[0069] Step S202: Initialize the 24-hour energy storage system state. In this invention, the energy storage system can be in one of the following states within one hour: 0: Anti-reverse current failure (photovoltaic output needs to be stopped), 1: Grid power supply (at this time, the user needs to buy electricity from the grid to supply power to the household load or charge the energy storage power supply), 2: Self-consumption (matching the household load of the user who has installed the energy storage power supply), 3: Energy sharing (at this time, energy needs to be provided to other households). The initial default state is state 2, self-consumption. The next step is to execute step S203.

[0070] Step S203: Look up the table to obtain the state corresponding to the current time. For example, the current time 11:30 corresponds to state 2 at 11:00 in the table. Next, proceed to step S204.

[0071] Step S204: Control the system according to the currently obtained state. Next, proceed to step S205;

[0072] Step S205: Determine whether the anti-reverse current failure condition is met. If yes, proceed to step S206; otherwise, proceed to step S208. The anti-reverse current failure condition refers to a situation where the photovoltaic output still has residual power even when the battery is fully charged, making it impossible to achieve the anti-reverse current function through the energy storage power source, i.e., anti-reverse current failure.

[0073] Step S206: Determine whether to enter the next time period. If yes, proceed to step S207; otherwise, proceed to step S214. Note that the photovoltaic system will stop outputting power during this time period.

[0074] Step S207: Modify the status value corresponding to the previous time period to 0, and then proceed to step S211.

[0075] Step S208: Determine whether the grid power supply conditions are met. If yes, proceed to step S209; otherwise, proceed to step S211. The grid power supply conditions refer to the battery's state of charge (SOC) being below a certain set discharge stop threshold, which in one embodiment of the present invention is 10.

[0076] Step S209: Determine whether to enter the next time period. If yes, proceed to step S210; otherwise, proceed to step S214. Note that during this time period, the energy storage power supply will be stopped from supplying power to the load.

[0077] Step S210: Modify the STATE value corresponding to the previous time period to 1, and then proceed to step S212.

[0078] Step S211: Determine if the current state is state 1 and meets the self-consumption condition. If yes, proceed to step S212; otherwise, proceed to step S214. The self-consumption condition refers to the battery SOC being greater than the discharge stop threshold plus the deviation.

[0079] Step S212: Determine whether the current time is 1 o'clock of the next day. If yes, proceed to step S213; otherwise, proceed to step S214.

[0080] Step S213: Optimize and adjust the status plan table, then proceed to step S214.

[0081] Step S214: The current algorithm call is complete. The next step will begin from step S203.

[0082] In some specific embodiments, according to the method provided in this application, the actual status table and status plan table of the system running for 4 days are shown in Table 4 below. After adjustment, it can meet the requirements of anti-backflow while maximizing the value created by photovoltaic work for users.

[0083] Table 4

[0084]

[0085] As shown in Table 4, the initial state on the first day was all state 2. After running, it was found that state 0 (the photovoltaic panel stopped outputting power) appeared in time periods "14" and "15". This indicates that after the first day, the nearest non-state 3 to the left of time period "14" (time period "13", state 2) will be optimized and adjusted to state 3, while other time periods will remain unchanged. This will be used as the schedule for the second day. It is planned that time period "13" on the second day will start sharing to consume excess photovoltaic power.

[0086] The new plan was implemented on the second day, and state 0 (time periods "14" and "15") still existed. So after the second day ended, the optimization continued. The non-state 3 closest to the left of time period "13" (time period "12", state 2) was also optimized and adjusted to state 3, and the shared window was moved forward by one hour.

[0087] After running according to the new plan on the third day, state 0 disappeared, but a new state 2 appeared. So the time period 13 (state 3) was changed back to state 2 as the plan for the fourth day.

[0088] On the fourth day, according to the schedule, its operation was approaching perfection and stability.

[0089] This application successfully resolves the contradiction between backflow prevention and efficient energy utilization in distributed generation and energy storage systems by introducing an adaptive optimization mechanism based on a state planning table. Its core benefits lie in the system's ability to perform forward-looking energy planning on a daily basis and hourly timeframe, dynamically adjusting its operating state through a dual learning strategy combining real-time response and daily optimization. This method not only reliably prevents backflow of electricity into the grid, ensuring grid security, but more importantly, it intelligently guides the system to prioritize self-consumption, proactively activating a "power sharing" mode to generate revenue when photovoltaic power is surplus, and switching to a "grid-based power supply" mode to ensure power supply when energy is insufficient. Ultimately, the entire system automatically approaches its optimal operating state without human intervention, maximizing the local consumption of photovoltaic power generation, significantly improving users' energy self-sufficiency and economic returns. It is an advanced energy management system integrating safety, economy, and intelligence.

[0090] This application also provides system embodiments that follow the above embodiments, for implementing the method steps described in the above embodiments. The interpretation of the same names is the same as that in the above embodiments, and they have the same technical effects as those in the above embodiments, so they will not be repeated here.

[0091] like Figure 3 As shown, this application provides a power supply control system, including:

[0092] Energy storage power supply, used to store photovoltaic energy and supply power to loads;

[0093] Photovoltaic panels are connected to an energy storage power source for charging.

[0094] The distribution box on your own side connects to your own loads;

[0095] The neighbor's distribution box connects to the neighbor's load.

[0096] The main smart meter is installed on the circuit between the energy storage power source and the power grid to measure the power consumption of the loads in your own home and your neighbors' homes.

[0097] The home-side smart meter is installed at the connection point between the energy storage power supply and the main smart meter to measure the power consumption of the home's load.

[0098] A relay is installed between the power grid and the neighboring distribution box, and is controlled by the energy storage power source to connect or disconnect the connection with the power grid.

[0099] The communication module includes a first communication circuit and a second communication circuit, which are respectively connected to the energy storage power supply and the smart meter on the home side and the main smart meter;

[0100] The control module, integrated within the energy storage power supply, is configured to read and update the status plan table or the actual status table, as well as to perform power supply control.

[0101] Regarding the system in the above embodiments, the specific ways in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0102] Although the operations are described in a specific order in the accompanying drawings, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the operations shown to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0103] The methods and systems of this application can be implemented using standard programming techniques, utilizing rule-based logic or other logic to implement various method steps. It should also be noted that the terms "system" and "module" as used herein and in the claims are intended to include implementations using one or more lines of software code and / or hardware implementations and / or devices for receiving input.

[0104] Any step, operation, or procedure described herein may be performed or implemented using one or more hardware or software modules, either alone or in combination with other devices. In one embodiment, the software module is implemented using a computer program product comprising a computer-readable medium containing computer program code, which is executable by a computer processor to perform any or all of the described steps, operations, or procedures.

[0105] The foregoing description of implementations of this application has been provided for illustrative and descriptive purposes. The foregoing description is not exhaustive and is not intended to limit this application to the exact forms disclosed. Various modifications and variations may exist in accordance with the foregoing teachings, or may arise from practice of this application. These embodiments were chosen and described to illustrate the principles of this application and its practical application, enabling those skilled in the art to utilize this application in various implementations and modifications to suit the specific purpose of the concept.

[0106] Regarding the system in the above embodiments, the specific ways in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0107] It can be further understood that, unless otherwise specified, "connection" includes both direct connections where no other components exist between the two parties and indirect connections where other components exist between them.

[0108] It is further understood that although the operations are described in a specific order in the accompanying drawings in the embodiments of this application, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all the operations shown to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0109] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the field of this application that are not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0110] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

[0111] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A power supply control method, applied to a distributed generation and energy storage system including an energy storage power source, a photovoltaic panel, a home-side distribution box, a neighbor-side distribution box, at least two smart meters, a relay installed between the power grid and the neighbor-side distribution box, and the power grid itself; wherein a main smart meter is installed on the circuit between the energy storage power source and the power grid to measure the power consumption of the home's and neighbor's loads; and a home-side smart meter is installed at the connection point between the energy storage power source and the main smart meter to measure the power consumption of the home's loads, characterized in that... The method includes: Obtain the status plan table of the energy storage system in the current cycle; wherein, the status plan table includes the status of the energy storage system corresponding to different time periods within the current cycle, and the energy storage system status includes anti-reverse failure status, grid power supply status, self-consumption status, and power sharing status; Based on the current energy storage system status, the corresponding power supply control is executed, specifically as follows: In response to the current time period corresponding to the energy storage system state being grid-fed, at this time the state of charge of the energy storage power supply is lower than the preset discharge stop threshold, the photovoltaic panel power generation does not meet the load demand, and it is necessary to draw power from the grid. The photovoltaic panel is controlled to output normally, the relay is controlled to be in the energized state, and the energy storage power supply is controlled to stop outputting to the outside. In response to the current energy storage system status being self-consumption, the photovoltaic panel generates electricity normally, prioritizing the needs of its own load. Any surplus electricity is then automatically used to charge the energy storage power supply. The photovoltaic panel is controlled to output normally, the relay is controlled to be in the energized state, and the power supply to the load is matched based on the data from the smart meter on the home side. In response to the current energy storage system status being in the anti-reverse current failure state, the photovoltaic panel still has residual power after meeting the real-time power demand of its own load and the charging demand of the energy storage power supply. The photovoltaic panel is controlled to stop outputting power, the relay is controlled to be in the energized state, and the load power supply is matched based on the total smart meter data. In response to the current energy storage system state being in the power sharing state, the photovoltaic panel generates electricity normally. In addition to meeting the load demand of its own household and the charging demand of the energy storage power supply, the total smart meter monitors the load demand of the neighbors in real time, supplies power to the neighbors' loads in a targeted manner, controls the photovoltaic panel to output normally, controls the relay to be in the off state, and matches the load power supply based on the data of the total smart meter. Collect the operating data of the energy storage system, and change the state of the energy storage system corresponding to the current time period when the operating data meets the specified state switching conditions; After completing a full cycle, obtain the actual state table for the current cycle; based on the actual state table, update the state plan table for the next cycle according to the adjustment rules.

2. The method according to claim 1, characterized in that, Each cycle is defined as a day, and each time period is defined as an hour.

3. The method according to claim 1, characterized in that, The current period's status plan table is obtained in the following way: In response to the initial power-on of the energy storage system, a pre-configured default state actual table is obtained as the state plan table for the current period; In response to the energy storage system not being powered on for the first time, the updated state plan table based on the actual state table of the previous cycle is obtained.

4. The method according to claim 3, characterized in that, The default state in the actual table is uniformly defined for each time period as the corresponding self-generated and self-used state.

5. The method according to claim 1, characterized in that, The specified state switching condition is one of the following: anti-reverse flow failure condition, grid power supply condition, and self-consumption condition; The anti-reverse current failure condition is that after the photovoltaic panel is fully charged with the energy storage power supply, there is still residual output power. The grid power draw condition is that the battery state of charge of the energy storage power source is lower than the set discharge stop threshold. The self-generation and self-consumption condition is that the state of charge of the battery of the energy storage power source is higher than the sum of the discharge stop threshold and the preset deviation value.

6. The method according to claim 5, characterized in that, The adjustment rules include: For time periods marked as anti-reverse flow failure in the actual status table, adjust the previous and most recent non-energy sharing time period to energy sharing status; For time periods marked as grid-connected in the actual status table, the earliest and most recent energy-sharing time period is adjusted to self-consumption status.

7. The method according to claim 1, characterized in that, The step of executing corresponding power supply control according to the energy storage system status of the current time period includes: Based on a predefined state-action lookup table, determine the set of control commands corresponding to the current state of the energy storage system. The control instruction set is executed to control the operation of the photovoltaic panel, the energy storage power supply, and the relay.

8. A power supply control system for implementing the method as described in any one of claims 1-7, characterized in that, The system includes: Energy storage power supply, used to store photovoltaic energy and supply power to loads; A photovoltaic panel is connected to the energy storage power source for charging. The distribution box on your own side connects to your own loads; The neighbor's distribution box connects to the neighbor's load. The main smart meter is installed on the circuit between the energy storage power source and the power grid to measure the power consumption of the loads in one's own home and those of neighbors; The home-side smart meter is installed at the connection point between the energy storage power supply and the main smart meter to measure the power consumption of the home's load. A relay is installed between the power grid and the neighboring distribution box, and is controlled by the energy storage power source to connect or disconnect the connection with the power grid. The communication module includes a first communication circuit and a second communication circuit, which are respectively connected to the energy storage power supply and the home-side smart meter and the main smart meter; The control module, integrated within the energy storage power supply, is configured to perform reading and updating of the state plan table or the actual state table, as well as to perform power supply control.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the method as described in any one of claims 1-7.

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