Energy scheduling method, energy management system, energy scheduling system and storage medium

Abstract

The present application relates to the field of energy scheduling technology and discloses an energy scheduling method, an energy management system, an energy scheduling system, and a storage medium. The method is applied to the energy management system and includes: obtaining the current remaining power value of the energy storage subsystem and the grid connection status and the load status of the load subsystem; if the grid connection status is the grid-connected state and the load status is the idle state, then: when the current remaining power value is less than or equal to the first threshold value, entering the first working mode; when the current remaining power value is greater than the first threshold value and less than the second threshold value, obtaining the first historical working mode at the previous moment; if the first historical working mode is the second working mode, continuing to enter the second working mode; otherwise, entering the first working mode; when the current remaining power value is greater than or equal to the second threshold value, entering the second working mode. The present application improves energy utilization efficiency.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of energy scheduling technology, and specifically to an energy scheduling method, an energy management system, an energy scheduling system, and a storage medium. Background Art

[0002] With the rapid development of new energy technologies, photovoltaic energy storage and charging systems, as multi-energy complementary systems integrating photovoltaic power generation, energy storage, and electric vehicle charging, have become a research hotspot in the smart energy field. These systems not only enable efficient utilization of green energy but also effectively alleviate the burden on the power grid. Their development is closely related to photovoltaic power generation technology, energy storage subsystems, and smart charging piles.

[0003] The rapid global adoption of electric vehicles in recent years has placed higher demands on charging infrastructure. Simultaneously, the declining costs of photovoltaic power generation technology and energy storage subsystems have garnered significant attention for the application of photovoltaic energy storage charging pile systems in distributed energy systems. Optimizing energy scheduling strategies to coordinate the matching of photovoltaic power generation and energy storage subsystems with charging demand, thereby improving system energy efficiency, remains a pressing challenge. Summary of the Invention

[0004] In view of the above problems, the embodiments of the present application provide an energy scheduling method, an energy management system, an energy scheduling system and a storage medium, which are used to solve the problem of low energy utilization efficiency of photovoltaic energy storage charging pile systems in the prior art.

[0005] According to one aspect of an embodiment of the present application, there is provided an energy scheduling method, which is applied to an energy management system, wherein the energy management system is used to manage a power generation subsystem, an energy storage subsystem and a load subsystem, and the method comprises: obtaining a current remaining power value and a grid connection status of the energy storage subsystem, wherein the grid connection status comprises a grid-connected state and an off-grid state; obtaining a load status of the load subsystem, wherein the load status comprises a working state and an idle state; if the grid connection status is a grid-connected state and the load status is an idle state, then: when the current remaining power value is less than or equal to a first threshold value, entering a first working mode, wherein the first working mode is One working mode is to control the power generation subsystem to charge the energy storage subsystem, and to control the mains network to charge the energy storage subsystem according to the mains electricity price; when the current remaining power value is greater than the first threshold and less than the second threshold, the first historical working mode at the previous moment is obtained; if the first historical working mode is the second working mode, the second working mode is continued to be entered, wherein the second working mode is to control the power generation subsystem to charge the energy storage subsystem and the mains network stops charging the energy storage subsystem; otherwise, the first working mode is entered; when the current remaining power value is greater than or equal to the second threshold, the second working mode is entered.

[0006] In an optional manner, when the energy management system enters the first operating mode or the second operating mode: the current rechargeable power of the energy storage subsystem is obtained; if the current rechargeable power is greater than or equal to the rated power of the power generation subsystem, the maximum output power of the power generation subsystem is set to the rated power; if the current rechargeable power is less than the rated power, the maximum output power of the power generation subsystem is set to the current rechargeable power.

[0007] In an optional manner, the method further includes: if the grid connection state is a grid-connected state and the load state is a working state, then: when the current remaining power value is less than or equal to a third threshold value, wherein the third threshold value is less than the first threshold value, then entering a third working mode, wherein the third working mode is that if the real-time output power of the power generation subsystem is greater than the real-time power of the load subsystem, then the power generation subsystem is controlled to provide power to the load subsystem and charge the energy storage subsystem; if the real-time output power of the power generation subsystem is equal to the real-time power of the load subsystem, then the power generation subsystem is controlled to provide power to the load subsystem; if the real-time output power of the power generation subsystem is less than the real-time power of the load subsystem, then the power generation subsystem and the mains network are controlled to provide power to the load subsystem; when the current remaining power value is greater than the third threshold value and less than a fourth threshold value , then obtain the second historical working mode of the previous moment, wherein the fourth threshold value is less than the first threshold value; if the second historical working mode is the third working mode, continue to enter the third working mode; otherwise, enter the fourth working mode, wherein the fourth working mode is that if the real-time output power of the power generation subsystem is greater than the real-time power of the load subsystem, then control the power generation subsystem to provide power to the load subsystem and charge the energy storage subsystem; if the real-time output power of the power generation subsystem is equal to the real-time power of the load subsystem, then control the power generation subsystem to provide power to the load subsystem; if the real-time output power of the power generation subsystem is less than the real-time power of the load subsystem, then control the power generation subsystem and the energy storage subsystem to provide power to the load subsystem; when the current remaining power value is greater than or equal to the fourth threshold value, enter the fourth working mode.

[0008] In an optional manner, when the energy management system enters the third operating mode or the fourth operating mode: the current rechargeable power of the energy storage subsystem is obtained; if the sum of the current rechargeable power and the real-time power of the load subsystem is greater than or equal to the rated power of the power generation subsystem, the maximum output power of the power generation subsystem is set to the rated power; if the sum is less than the rated power, the maximum output power of the power generation subsystem is set to the sum.

[0009] In an optional embodiment, the method further includes: in response to receiving a request to calibrate the energy storage subsystem, shutting down the load subsystem; if the current remaining power value is less than the fifth threshold, controlling the energy storage subsystem to discharge until the remaining power of the energy storage subsystem reaches a sixth threshold, and controlling the power generation subsystem to charge the energy storage subsystem until the stored power of the energy storage subsystem reaches a seventh threshold, so that the energy storage subsystem is calibrated, wherein the fifth threshold is greater than the sixth threshold, and the seventh threshold is greater than the fifth threshold; if the current remaining power value is greater than or equal to the fifth threshold, controlling the power generation subsystem to charge the energy storage subsystem until the stored power of the energy storage subsystem reaches the seventh threshold, and controlling the energy storage subsystem to discharge until the remaining power of the energy storage subsystem reaches the sixth threshold, so that the energy storage subsystem is calibrated.

[0010] In an optional manner, the method further includes: if the grid connection state is an off-grid state, then: when the current remaining power value is less than or equal to an eighth threshold value, entering a fifth working mode, wherein the fifth working mode is to control the output power of the power generation subsystem to be zero, and to control the load subsystem and the energy storage subsystem to be in a closed state; when the current remaining power value is greater than the eighth threshold value and less than a ninth threshold value, entering a sixth working mode, wherein the sixth working mode is to control the power generation subsystem to charge the energy storage subsystem and to control the load subsystem to be in a closed state.

[0011] In an optional manner, the method further includes: if the grid connection state is an off-grid state and the load state is an idle state, then: when the current remaining power value is greater than or equal to the ninth threshold value and less than the tenth threshold value, the third historical working mode of the previous moment is obtained; if the third historical working mode belongs to the sixth working mode, continue to enter the sixth working mode; otherwise, enter the seventh working mode, wherein the seventh working mode is to control the power generation subsystem to charge the energy storage subsystem; when the current remaining power value is greater than or equal to the tenth threshold value, enter the seventh working mode; if the grid state is an off-grid state and the load state is a working state, then: when the current When the remaining power value is greater than or equal to the ninth threshold value, the eighth working mode is entered, wherein the eighth working mode is that if the real-time output power of the power generation subsystem is greater than the real-time power of the load subsystem, the power generation subsystem is controlled to provide power to the load subsystem and charge the energy storage subsystem; if the real-time output power of the power generation subsystem is equal to the real-time power of the load subsystem, the power generation subsystem is controlled to provide power to the load subsystem; if the real-time output power of the power generation subsystem is less than the real-time power of the load subsystem, the power generation subsystem and the energy storage subsystem are controlled to provide power to the load subsystem, and the working power of the load subsystem is set to the preset power.

[0012] According to another aspect of an embodiment of the present application, an energy management system is provided, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the energy scheduling method described above.

[0013] According to another aspect of an embodiment of the present application, an energy scheduling system is provided, which includes a power generation subsystem, an energy storage subsystem, a load subsystem and the energy management system as described above.

[0014] According to another aspect of the embodiments of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the energy scheduling method described above is implemented.

[0015] In the embodiment of the present application, by setting a buffer zone (a first interval consisting of a first threshold and a second threshold, and a second interval consisting of a third threshold and a fourth threshold), when the current remaining power value belongs to the first interval or the second interval, by obtaining the historical operating mode at the previous moment and determining the operating mode of the energy management system based on the historical operating mode, it is avoided that the energy management system frequently switches between two different operating modes when the power of the energy storage subsystem fluctuates, thereby avoiding unnecessary energy consumption and improving energy utilization efficiency. In addition, by avoiding the energy management system frequently switching between two different operating modes, the service life of each subsystem in the energy scheduling system 1 can be improved.

[0016] Moreover, in an embodiment of the present application, when the grid connection state of the energy storage subsystem is a grid-connected state, different working modes are divided according to the load state of the load subsystem and the current remaining power value of the energy storage subsystem. When the load state and the current remaining power value are different, the energy management system enters a different working mode to manage the power generation subsystem, the energy storage subsystem and the load subsystem. Compared with setting only a single working mode to manage the power generation subsystem, the energy storage subsystem and the load subsystem, the energy utilization efficiency can be improved, the waste of electric energy generated by the power generation subsystem can be avoided, and the frequent charging and discharging of the energy storage subsystem can be avoided, thereby extending the battery service life of the energy storage subsystem.

[0017] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to more clearly understand the technical means of the embodiments of the present application, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present application. In addition, the same reference symbols are used to represent the same components throughout the drawings. In the drawings:

[0019] Figure 1 A schematic diagram of an energy scheduling system provided in an embodiment of the present application is shown;

[0020] Figure 2 A schematic diagram of an energy management system provided by an embodiment of the present application is shown;

[0021] Figure 3 A schematic diagram of the flow of the energy scheduling method provided in an embodiment of the present application is shown;

[0022] Figure 4 A flow chart of an energy scheduling method provided in another embodiment of the present application is shown. DETAILED DESCRIPTION

[0023] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0024] With technological advancements, the performance of new energy vehicles continues to improve while their costs gradually decrease, leading to a growing number of new energy vehicles. Consequently, the demand for charging these vehicles is also increasing, prompting an accelerated pace of construction and upgrades in charging infrastructure to meet this growing demand. Given the growing global energy shortage, the development and utilization of green energy generation is becoming increasingly imperative. Against this backdrop, the combination of photovoltaic subsystems, energy storage subsystems, and charging stations presents an ideal solution. Photovoltaic subsystems convert solar energy into electricity, which is not only clean and pollution-free but also inexhaustible. Energy storage subsystems efficiently store this generated energy and provide it to charging stations, ensuring a stable and reliable power supply. Charging stations, acting as a bridge between new energy vehicles and the power supply, utilize energy from both the photovoltaic subsystem and the energy storage subsystem to provide charging services for new energy vehicles, thereby forming a closed-loop green energy ecosystem that promotes sustainable social development.

[0025] Because photovoltaic power generation subsystems convert solar energy directly into electricity through solar cells, their power generation is affected by light intensity and ambient temperature, resulting in intermittent and fluctuating performance. The energy storage subsystem can store the electricity generated by the power generation subsystem and also provide this stored energy to the load subsystem. Currently, lithium-ion batteries have become the mainstream energy storage method due to their high energy density, long life, and rapid response. The charge and discharge strategy of the energy storage subsystem directly affects its overall performance and lifespan. Therefore, how to comprehensively control and optimize the scheduling of the power generation subsystem, energy storage subsystem, and load subsystem (such as charging stations) to schedule energy and ensure a balance between economy and reliability is a problem that needs to be solved.

[0026] If the power generation subsystem is used first to provide electricity to the load subsystem, when the electricity provided by the power generation subsystem cannot meet the power demand of the load subsystem, the energy storage subsystem is used to supplement the power supply to the charging pile; when both the power generation subsystem and the energy storage subsystem cannot meet the power demand of the load subsystem, power is provided to the load subsystem through the power grid. This method does not fully consider the matching between the real-time power demand of the load subsystem and the dynamic characteristics of the power generation subsystem, which may lead to low energy utilization efficiency and accelerated aging of the energy storage subsystem due to frequent charging and discharging.

[0027] Based on the above considerations, the present application proposes an energy management system, which obtains the current remaining power value and grid connection status of the energy storage subsystem at the current moment, and obtains the load status of the load subsystem, and then enters the corresponding working mode according to the current remaining power value, grid connection status and load status, so as to manage the power generation subsystem, energy storage subsystem and load subsystem, thereby realizing energy scheduling. Since the current remaining power value, grid connection status and load status are different, the energy management system enters different working modes, that is, the way of managing the power generation subsystem, energy storage subsystem and load subsystem is also different. Compared with the way of managing the power generation subsystem, energy storage subsystem and load subsystem in a single mode, the energy utilization rate can be improved.

[0028] Figure 1 Schematic diagram of the energy scheduling system provided by the embodiment of the present application is shown. Figure 1 As shown, the energy dispatching system 1 includes a power generation subsystem 10, an energy storage subsystem 20, a load subsystem 30, and an energy management system 40. The power generation subsystem 10 can be a new energy power generation subsystem, such as a photovoltaic power generation subsystem, a hydropower generation subsystem, or a wind power generation subsystem. The energy storage subsystem 20 is a subsystem that can store energy and provide its stored energy to the load subsystem. The load subsystem 30 is a system that consumes energy, such as a charging station.

[0029] For example, if the power generation subsystem 10 is a photovoltaic power generation subsystem and the load subsystem 30 is a charging station, the photovoltaic power generation subsystem converts solar energy into electrical energy, which can then be stored in the energy storage subsystem 20 or directly supplied to the charging station. The electrical energy stored in the energy storage subsystem 20 can then be supplied to the charging station.

[0030] The energy management system 40 is used to execute the energy scheduling method provided in the embodiment of the present application to manage the power generation subsystem 10, the energy storage subsystem 20 and the load subsystem 30, thereby realizing energy scheduling and improving energy utilization.

[0031] Figure 2 FIG. 1 shows a schematic diagram of an energy management system provided by an embodiment of the present application. Figure 2 As shown, the energy management system 40 includes a processor 42 and a memory 44 .

[0032] The memory 44 is used to store a computer program 46. The memory 44 may include a high-speed RAM memory, or may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The computer program 46 may include computer-executable instructions.

[0033] The processor 42 is configured to execute a computer program 46 to implement the energy scheduling method provided in the following embodiments.

[0034] Processor 42 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application. The one or more processors included in energy management system 40 may be of the same type, such as one or more CPUs, or may be of different types, such as one or more CPUs and one or more ASICs.

[0035] Figure 3 FIG. 4 shows a flow chart of an energy scheduling method provided in an embodiment of the present application, which is executed by the energy management system 40. Figure 3 As shown, the method includes the following steps:

[0036] Step 201: Acquire the current remaining power value and grid connection status of the energy storage subsystem 20.

[0037] As previously mentioned, the energy storage subsystem 20 can store the electrical energy generated by the power generation subsystem 10 and also provide electrical energy to the load subsystem 30. The current remaining capacity refers to the current amount of electrical energy stored in the energy storage subsystem 20 and can be expressed as the state of charge (SOC). The SOC typically ranges from 0 to 1, with an SOC of 0 indicating that the energy storage subsystem 20 is fully discharged, and an SOC of 1 indicating that the energy storage subsystem 20 is fully charged.

[0038] The grid connection status of the energy storage subsystem 20 includes a grid-connected state and an off-grid state. When the grid connection status of the energy storage subsystem 20 is the grid-connected state, it indicates that the energy storage subsystem 20 is normally connected to the grid and can receive electricity provided by the grid. When the grid connection status of the energy storage subsystem 20 is the off-grid state, it indicates that the energy storage subsystem 20 is disconnected from the grid and cannot receive electricity provided by the grid. In this step, the grid connection status of the energy storage subsystem 20 at the current moment is obtained.

[0039] Step 202 : Obtain the load status of the load subsystem 30 .

[0040] The load state of the load subsystem 30 includes an active state and an idle state. For example, if the load subsystem 30 is a charging pile, the charging pile is in an active state when charging a new energy vehicle; and in an idle state when not charging a new energy vehicle.

[0041] Step 203: Determine whether the grid connection state is a grid-connected state. If so, go to step 204.

[0042] Step 204: Determine whether the load state is an idle state. If so, go to step 205; if not, go to step 211.

[0043] Step 205: Determine whether the current remaining power value is less than or equal to a first threshold value. If so, go to step 206; if not, go to step 207.

[0044] Among them, when the output power of the power generation subsystem 10 cannot meet the power demand of the load subsystem 30, the electric energy stored in the energy storage subsystem 20 can be provided to the load subsystem 30 for use to ensure that the load subsystem 30 can operate normally. Therefore, the remaining amount of electricity in the energy storage subsystem 20 directly affects whether it can normally provide electric energy to the load subsystem 30. When the remaining amount of electricity in the energy storage subsystem 20 is small, it means that there is a large demand to charge the load subsystem 30 at present, so as to increase the electric energy stored in the energy storage subsystem 20 as soon as possible, so that the energy storage subsystem 20 can subsequently provide electric energy to the load subsystem 30 to meet the power demand of the load subsystem 30. When the remaining amount of electricity in the energy storage subsystem 20 is sufficient, it means that there is a relatively small demand to charge the load subsystem 30 at present.

[0045] Therefore, in the embodiment of the present application, a first threshold is set to determine whether the remaining power in the energy storage subsystem 20 is sufficient based on the magnitude relationship between the current remaining power value and the first threshold. When the current remaining power value is less than or equal to the first threshold, it indicates that the remaining power in the energy storage subsystem 20 is relatively small. When the current remaining power value is greater than the first threshold, it indicates that the remaining power in the energy storage subsystem 20 is relatively sufficient. The first threshold can be set as needed, for example, 43% or 45%.

[0046] Step 206: Enter the first working mode.

[0047] The first working mode is that the energy management system 40 controls the power generation subsystem 10 to charge the energy storage subsystem 20 , and controls the mains network to charge the energy storage subsystem 20 according to the mains electricity price.

[0048] Specifically, controlling the amount of electricity the mains network charges to the energy storage subsystem 20 based on the mains electricity price means increasing the amount of electricity the mains network charges to the energy storage subsystem 20 when the mains electricity price is low (e.g., during off-peak hours), and reducing the amount of electricity the mains network charges to the energy storage subsystem 20 when the mains electricity price is high (e.g., during peak hours). By controlling the amount of electricity the mains network charges to the energy storage subsystem 20 based on the mains electricity price, electricity consumption costs can be reduced.

[0049] In the embodiment of the present application, when the current remaining power value is small (for example, less than the first threshold), it indicates that the current moment the energy storage subsystem 20 stores less electrical energy. Therefore, when the load subsystem 30 is idle and the energy storage subsystem 20 is in a grid-connected state, the electrical energy stored in the energy storage subsystem 20 can be increased by controlling the mains network to charge the energy storage subsystem 20 according to the mains electricity price. This allows the energy storage subsystem 20 to be used to provide electrical energy to the load subsystem 30 when the load subsystem 30 is in operation and the electrical energy provided by the power generation subsystem 10 cannot meet the needs of the load subsystem 30. This ensures that the load subsystem 30 can operate normally. Furthermore, by controlling the power generation subsystem 10 to charge the energy storage subsystem through the energy management system 40, the electrical energy currently generated by the power generation subsystem 10 can be stored to avoid waste.

[0050] In some embodiments, when the energy management system 40 enters the first operating mode, the energy management system 40 sets the output power of the load subsystem 30 to its rated maximum power. The energy storage subsystem 20 is set to charging mode. If the output power of the power generation subsystem 10 is greater than the current chargeable power of the energy storage subsystem 20, the charging power of the energy storage subsystem 20 is set to the current chargeable power. If the output power of the power generation subsystem 10 is less than the current chargeable power of the energy storage subsystem 20, the power generation subsystem 10 and the mains network simultaneously charge the energy storage subsystem 20. At this time, the charging power of the energy storage subsystem 20 is set to the sum of the output power of the power generation subsystem 10 and the configured grid power.

[0051] Step 207: Determine whether the current remaining power value is greater than the first threshold and less than the second threshold. If so, go to step 208; if not, go to step 210.

[0052] Among them, when the energy storage subsystem 20 is in a charging state, it also consumes a certain amount of electricity, so the power of the energy storage subsystem 20 fluctuates. Therefore, if the operating mode of the energy management system 40 is determined only based on the current remaining power value, the operating mode of the energy management system 40 may cause the operating mode of the energy management system 40 to frequently switch between two different operating modes, resulting in unnecessary energy consumption and affecting the service life of each subsystem in the energy scheduling system 1. For example, if it is set that when the current remaining power value is less than a certain threshold (for example, 50%), the energy management system 40 enters operating mode A, and when the current remaining power value is greater than or equal to the threshold, the energy management system 40 enters operating mode B, because the energy storage subsystem 20 also consumes a certain amount of electricity when it is in a charging state, even if the current remaining power value reaches the threshold, if the power charged to the energy storage subsystem 20 is less than the power consumed by the energy storage subsystem 20 when it is in an operating state, the current remaining power value will be less than the threshold, resulting in the energy management system 40 frequently switching between operating modes A and B, causing unnecessary energy consumption and shortening the service life of each subsystem.

[0053] Therefore, in the embodiment of the present application, by setting a second threshold value so that the first threshold value and the second threshold value form a buffer zone, when the current remaining power value falls within the interval formed by the first threshold value and the second threshold value, by obtaining the historical operating mode of the energy management system 40 at the previous moment, and then determining the operating mode of the energy management system 40 based on the historical operating mode, it is possible to avoid the energy management system 40 frequently switching between two different operating modes when the current remaining power value fluctuates above and below the first threshold value. The second threshold value is greater than the first threshold value and can be set as needed, for example, 48% or 50%.

[0054] Step 208: Obtain the first historical working mode at the previous moment.

[0055] In this step, the working mode of the energy management system 40 at the previous moment is obtained.

[0056] In an embodiment of the present application, when the current remaining power value is greater than the first threshold value and less than the second threshold value, the working mode of the energy management system 40 at the previous moment (i.e., the first historical working mode) is obtained so that the working mode of the energy management system 40 can be subsequently determined according to the first historical working mode, thereby avoiding frequent switching of the energy management system 40 between two different working modes.

[0057] Step 209: Determine whether the first working mode is the second working mode. If yes, go to step 210; if no, go to step 206.

[0058] The second working mode is that the energy management system 40 controls the power generation subsystem 10 to charge the energy storage subsystem 20 and the mains power network stops charging the energy storage subsystem 20 .

[0059] In the embodiment of the present application, when the current remaining power value is large (for example, greater than the second threshold value), it indicates that a large amount of power is stored in the energy storage subsystem 20 at the current moment. Therefore, when the load subsystem 30 is in an idle state, the mains network stops charging the energy storage subsystem 20 to avoid electricity consumption costs, and by controlling the power generation subsystem 10 to charge the energy storage subsystem through the energy management system 40, the electric energy currently generated by the power generation subsystem 10 can be stored to avoid waste.

[0060] Step 210: Enter the second working mode.

[0061] Step 211: Determine whether the current remaining power value is less than or equal to a third threshold value. If yes, go to step 212; if not, go to step 213.

[0062] When the load subsystem 30 is in operation, if the power provided by the power generation subsystem 10 to the load subsystem 30 cannot meet the power demand of the load subsystem 30 and the energy storage subsystem 20 is required to provide additional power to the load subsystem 30, and if the remaining power in the energy storage subsystem 20 is low, the energy storage subsystem 20 may be drained, thereby affecting the service life of the energy storage subsystem 20. Therefore, to prevent the energy storage subsystem 20 from being drained, a third threshold is set to determine whether the energy storage subsystem 20 is at risk of draining based on the relationship between the current remaining power value and the third threshold. When the current remaining power value is less than or equal to the third threshold, it indicates that the remaining power in the energy storage subsystem 20 is low and there may be a risk of draining. By setting the energy management system 40 to enter the corresponding operating mode, the energy storage subsystem 20 is prevented from being drained. The third threshold is lower than the first threshold. The third threshold can be set as needed, for example, 18% or 20%.

[0063] Step 212: Enter the third working mode.

[0064] Among them, the third working mode is that if the real-time output power of the power generation subsystem 10 is greater than the real-time power of the load subsystem 30, the energy management system 40 controls the power generation subsystem 10 to provide power to the load subsystem 30 and charge the energy storage subsystem 20; if the real-time output power of the power generation subsystem 10 is equal to the real-time power of the load subsystem 30, the energy management system 40 controls the power generation subsystem 10 to provide power to the load subsystem 30; if the real-time output power of the power generation subsystem 10 is less than the real-time power of the load subsystem 30, the energy management system 40 controls the power generation subsystem 10 and the AC power network to provide power to the load subsystem 30.

[0065] Among them, the real-time output power of the power generation subsystem 10 refers to the electric energy power actually generated by the power generation subsystem 10 at the current moment, and its value will change dynamically with environmental conditions. Taking the power generation subsystem 10 as a photovoltaic power generation subsystem as an example, the real-time power of the photovoltaic power generation subsystem is affected by environmental factors such as light intensity and temperature. Therefore, the real-time output power of the photovoltaic power generation subsystem under different environmental factors will also be different. The real-time power of the load subsystem 30 refers to its output power. Taking the load subsystem 30 as a charging pile as an example, the real-time power of the charging pile is the power output by the charging pile when charging the car. The rechargeable power of the energy storage subsystem 20 refers to the maximum power that the energy storage subsystem 20 can withstand during the charging process.

[0066] Specifically, when the energy management system 40 enters the third operating mode, if the current real-time output power of the power generation subsystem 10 is greater than the real-time power of the load subsystem 30, the energy management system 40 controls the power generation subsystem 10 to provide power to the load subsystem 30 and charge the energy storage subsystem 20, thereby fully utilizing the power generated by the power generation subsystem 10 and avoiding waste. For example, if the current output power of the power generation subsystem 10 is P1 and the current power of the load subsystem 30 is P2 (where P1>P2), the energy management system 40 controls the power generation subsystem 10 to provide to the load subsystem 30 at P2. If the current chargeable power of the energy storage subsystem 20 is greater than or equal to P1-P2, the energy management system 40 controls the power generation subsystem 10 to provide to the energy storage subsystem 20 at P1-P2. If the current chargeable power of the energy storage subsystem 20 is P3 (where P3<(P1-P2)), the energy management system 40 controls the power generation subsystem 10 to provide to the energy storage subsystem 20 at P3.

[0067] If the current real-time output power of power generation subsystem 10 is equal to the real-time power of load subsystem 30, energy management system 40 controls power generation subsystem 10 to supply power to load subsystem 30, thereby fully utilizing the electrical energy generated by power generation subsystem 10 and avoiding waste. For example, if the current output power of power generation subsystem 10 is P4 and the current power of load subsystem 30 is P4, energy management system 40 controls power generation subsystem 10 to supply power to load subsystem 30 at P4.

[0068] If the current real-time output power of the power generation subsystem 10 is less than the real-time power of the load subsystem 30, the energy management system 40 controls the power generation subsystem 10 and the utility grid to provide power to the load subsystem 30, thereby ensuring the normal operation of the load subsystem 30. For example, if the current output power of the power generation subsystem 10 is P5 and the current power of the load subsystem 30 is P6 (where P5 < P6), the energy management system 40 controls the power generation subsystem 10 to provide to the load subsystem 30 to be P5, and controls the power provided by the utility grid to the load subsystem 30 to be P6 - P5.

[0069] In an embodiment of the present application, when the energy management system 40 enters the third operating mode, it means that the electrical energy stored in the energy storage subsystem 20 is less at this time (the current remaining power value is less than or equal to the third threshold value). Therefore, when the real-time output power of the power generation subsystem 10 is less than the real-time power of the load subsystem 30, the energy management system 40 controls the power generation subsystem 10 and the mains network to provide power to the load subsystem 30, rather than controlling the power generation subsystem 10 and the energy storage subsystem 20 to provide power to the load subsystem 30. This can avoid the discharge of electricity in the energy storage subsystem 20, thereby improving the service life of the energy storage subsystem 20.

[0070] In some embodiments, when the energy management system 40 enters the second operating mode or the third operating mode, the output power of the load subsystem 30 is set to its rated maximum power.

[0071] Step 213: Determine whether the current remaining power value is greater than the third threshold and less than the fourth threshold. If so, go to step 214; if not, go to step 216.

[0072] Among them, as mentioned above, if the working mode of the energy management system 40 is determined only based on the current remaining power value, it may cause the working mode of the energy management system 40 to frequently switch between two different working modes, thereby causing unnecessary energy consumption and affecting the service life of each subsystem in the energy scheduling system 1. Therefore, in an embodiment of the present application, by setting a fourth threshold value so that the third threshold value and the fourth threshold value constitute a buffer zone, when the current remaining power value belongs to the interval formed by the third threshold value and the fourth threshold value, by obtaining the historical working mode of the energy management system 40 at the previous moment, and then determining the working mode of the energy management system 40 based on the historical working mode, it is possible to avoid the energy management system 40 frequently switching between two different working modes when the current remaining power value fluctuates above and below the third threshold value. Among them, the fourth threshold value is greater than the third threshold value, and the fourth threshold value can be set as needed, for example, 38% or 40%.

[0073] Step 214: Obtain the second historical working mode at the previous moment.

[0074] In this step, the working mode of the energy management system 40 at the previous moment is obtained.

[0075] Step 215: Determine whether the second historical operating mode is the third operating mode. If so, go to step 212; if not, go to step 216.

[0076] Step 216: Enter the fourth working mode.

[0077] Among them, the fourth working mode is that if the real-time output power of the power generation subsystem 10 is greater than the real-time power of the load subsystem 30, the energy management system 40 controls the power generation subsystem 10 to provide power to the load subsystem 30 and charge the energy storage subsystem 20; if the real-time output power of the power generation subsystem 10 is equal to the real-time power of the load subsystem 30, the energy management system 40 controls the power generation subsystem 10 to provide power to the load subsystem 30; if the real-time output power of the power generation subsystem 10 is less than the real-time power of the load subsystem 30, the energy management system 40 controls the power generation subsystem 10 and the energy storage subsystem 20 to provide power to the load subsystem 30.

[0078] Among them, the fourth working mode is similar to the third working mode, so the principle of the fourth working mode can refer to the third working mode and will not be repeated here. The main difference between the two is that in the fourth working mode, if the real-time output power of the power generation subsystem 10 is less than the real-time power of the load subsystem 30, the energy management system 40 controls the power generation subsystem 10 and the energy storage subsystem 20 to provide power to the load subsystem 30. Since the energy management system 40 enters the fourth working mode, it means that there is more electrical energy stored in the energy storage subsystem 20 at this time. Therefore, when the real-time output power of the power generation subsystem 10 is less than the real-time power of the load subsystem 30, the energy management system 40 controls the power generation subsystem 10 and the energy storage subsystem 20 to provide power to the load subsystem 30, instead of controlling the power generation subsystem 10 and the mains network to provide power to the load subsystem 30, which can reduce the cost of electricity consumption.

[0079] In some embodiments, when the energy management system 40 enters the fourth operating mode, the output power of the load subsystem 30 is set to its rated maximum power.

[0080] Among them, steps 211 to 216 are similar to steps 205 to 210. Therefore, the principles and implementation methods of steps 211 to 216 can refer to steps 205 to 210 and will not be repeated here.

[0081] In the embodiment of the present application, by setting a buffer zone (a first interval consisting of a first threshold and a second threshold, and a second interval consisting of a third threshold and a fourth threshold), when the current remaining power value falls within the first interval or the second interval, by obtaining the historical operating mode at the previous moment and determining the operating mode of the energy management system 40 based on the historical operating mode, the energy management system 40 is prevented from frequently switching between two different operating modes when the power of the energy storage subsystem 20 fluctuates, thereby avoiding unnecessary energy consumption and improving energy utilization efficiency. In addition, by preventing the energy management system 40 from frequently switching between two different operating modes, the service life of each subsystem in the energy scheduling system 1 can be improved.

[0082] Moreover, in an embodiment of the present application, when the grid connection state of the energy storage subsystem 20 is a grid-connected state, different working modes are divided according to the load state of the load subsystem 30 and the current remaining power value of the energy storage subsystem 20. When the load state and the current remaining power value are different, the energy management system 40 enters a different working mode to manage the power generation subsystem 10, the energy storage subsystem 20 and the load subsystem 30. Compared with setting only a single working mode to manage the power generation subsystem 10, the energy storage subsystem 20 and the load subsystem 30, the energy utilization efficiency can be improved, the waste of electric energy generated by the power generation subsystem 10 can be avoided, and the energy storage subsystem 20 can be avoided from being frequently charged and discharged, thereby extending the battery service life of the energy storage subsystem.

[0083] In some embodiments, when the energy management system 40 enters the first operating mode or the second operating mode, the current rechargeable power of the energy storage subsystem 20 is obtained. If the current rechargeable power of the energy storage subsystem 20 is greater than or equal to the rated power of the power generation subsystem 10, the maximum output power of the power generation subsystem 10 is set to the rated power. If the current rechargeable power of the energy storage subsystem 20 is less than the rated power of the power generation subsystem 10, the maximum output power of the power generation subsystem 10 is set to the current rechargeable power. Taking the power generation subsystem 10 as a photovoltaic power generation subsystem as an example, the maximum power that the power generation subsystem 10 can output when environmental factors such as light intensity and temperature are favorable.

[0084] In the embodiment of the present application, when the current chargeable power of the energy storage subsystem 20 is greater than or equal to the rated power of the power generation subsystem 10, by setting the maximum output power of the power generation subsystem 10 to the rated power, the power generation subsystem 10 can fully utilize the electrical energy generated by the power generation subsystem 10 when charging the energy storage subsystem 20, thereby avoiding energy waste. When the current chargeable power of the energy storage subsystem 20 is less than the rated power of the power generation subsystem 10, by setting the maximum output power of the power generation subsystem 10 to the current chargeable power, the power generation subsystem 10 can avoid damage to the energy storage subsystem 20 due to overcharging when charging the energy storage subsystem 20, thereby ensuring the safe operation of the energy storage subsystem 20 and extending its service life.

[0085] In some embodiments, when the energy management system 40 enters the third operating mode or the fourth operating mode, the current rechargeable power of the energy storage subsystem 20 is obtained. If the sum of the current rechargeable power of the energy storage subsystem 20 and the real-time power of the load subsystem 30 is greater than or equal to the rated power of the power generation subsystem 10, the maximum output power of the power generation subsystem 10 is set to the rated power. If the sum of the current rechargeable power of the energy storage subsystem 20 and the real-time power of the load subsystem 30 is less than the rated power of the power generation subsystem 10, the maximum output power of the power generation subsystem 10 is set to the sum.

[0086] For example, if the current chargeable power of the energy storage subsystem 20 is P7, the current power of the load subsystem 30 is P8, and the rated power of the power generation subsystem 10 is P9, then if P7 + P8 ≥ P9, the maximum output power of the power generation subsystem 10 is set to P9. If P7 + P8 < P9, then the maximum output power of the power generation subsystem 10 is set to P7 + P8.

[0087] Among them, the embodiments of the present application are similar to the aforementioned embodiments, so the principles and technical effects of the embodiments of the present application can refer to the aforementioned embodiments and will not be repeated here.

[0088] The energy storage subsystem 20 includes an SOC determination module for determining the SOC of the energy storage subsystem 20 in real time. Over time, the performance of the batteries in the energy storage subsystem 20 will change, including capacity decay, internal resistance increase, etc. These factors will affect the accuracy of the SOC determined by the SOC determination module. Therefore, in order to ensure the accuracy of the SOC determined by the SOC determination module, that is, to improve the accuracy of the current remaining power value of the energy storage subsystem 20 obtained, in the embodiment of the present application, the energy scheduling method further includes:

[0089] Step a1: in response to receiving a request to calibrate the energy storage subsystem 20 , shutting down the load subsystem 30 .

[0090] The request to calibrate the energy storage subsystem 20 refers to a request to calibrate the SOC determination module in the energy storage subsystem 20. In the embodiment of the present application, when calibrating the SOC determination module, the load subsystem 30 is shut down to prevent the SOC determination module from providing power to the load subsystem 30 during the calibration process, thereby ensuring that the SOC determination module can be calibrated smoothly.

[0091] Step a2: If the current remaining power value is less than the fifth threshold, the energy storage subsystem 20 is controlled to discharge until the remaining power of the energy storage subsystem 20 reaches the sixth threshold, and the power generation subsystem 10 is controlled to charge the energy storage subsystem 20 until the stored power of the energy storage subsystem 20 reaches the seventh threshold, so that the energy storage subsystem 20 is calibrated.

[0092] The fifth threshold is greater than the sixth threshold, and the seventh threshold is greater than the fifth threshold. The fifth, sixth, and seventh thresholds can be set as needed, for example, the fifth threshold is set to 45% or 50%, the sixth threshold is set to 0 or 1%, and the seventh threshold is set to 99% or 100%.

[0093] Step a3: If the current remaining power value is greater than or equal to the fifth threshold, the power generation subsystem 10 is controlled to charge the energy storage subsystem 20 until the stored power of the energy storage subsystem 20 reaches the seventh threshold, and the energy storage subsystem 20 is controlled to discharge until the remaining power of the energy storage subsystem 20 reaches the sixth threshold, so that the energy storage subsystem 20 is calibrated.

[0094] In an embodiment of the present application, after the charge and discharge depth of the energy storage subsystem 20 is controlled to 100%, that is, after the energy storage subsystem 20 has undergone a complete charge and discharge process, the SOC determination module in the energy storage subsystem 20 can be triggered for calibration. In an embodiment of the present application, by obtaining the current remaining power value and determining whether to charge or discharge the energy storage subsystem 20 first based on the magnitude relationship between the current remaining power value and the fifth threshold, wasteful electrical energy is reduced. Specifically, if the current power level of the energy storage subsystem 20 is high (that is, the current remaining power value is greater than or equal to the fifth threshold), the energy storage subsystem 20 is first charged and then controlled to discharge, rather than first controlling the energy storage subsystem 20 to discharge and then charge it. This reduces the power provided by the power generation subsystem 10 to the energy storage subsystem 20, thereby reducing electrical energy waste and improving energy utilization efficiency. If the current power level of the energy storage subsystem 20 is low (i.e., the current remaining power value is less than the fifth threshold), the energy storage subsystem 20 is first controlled to discharge and then charged, rather than first charging the energy storage subsystem 20 and then controlling the energy storage subsystem 20 to discharge. This can reduce the amount of power released when the energy storage subsystem 20 is discharged, reduce power waste, and improve energy utilization efficiency.

[0095] Figure 4 FIG. 1 shows a flow chart of an energy scheduling method provided by another embodiment of the present application. Figure 4 As shown, the method includes the following steps:

[0096] Step 301: Acquire the current remaining power value and grid connection status of the energy storage subsystem 20.

[0097] Step 302 : Obtain the load status of the load subsystem 30 .

[0098] Step 303: Determine whether the grid connection state is a grid-connected state. If not, go to step 304.

[0099] Among them, steps 301 to 303 are the same as steps 201 to 203, so the principles and specific implementation methods of steps 301 to 303 can refer to steps 201 to 203.

[0100] Step 304: Determine whether the current remaining power value is less than or equal to the eighth threshold. If so, go to step 305; if not, go to step 306.

[0101] Among them, when the energy storage subsystem 20 is in an off-grid state, it cannot obtain electricity from the power grid, and it needs to provide working power to the power generation subsystem 10. Therefore, when the remaining power in the energy storage subsystem 20 is very small, if it still provides working power to the power generation subsystem 10, it may cause the power in the energy storage subsystem 20 to be drained. Therefore, in order to avoid the above situation, in an embodiment of the present application, an eighth threshold is set to determine whether the remaining power in the current energy storage subsystem 20 is very small based on the size relationship between the current remaining power value and the eighth threshold. If the current remaining power value is less than or equal to the eighth threshold, it indicates that the remaining power in the current energy storage subsystem 20 is very small, and the energy management system 40 is set to enter the corresponding working mode to avoid the situation where the power in the energy storage subsystem is drained. Among them, the eighth threshold can be set as needed, for example, 4% or 5%.

[0102] Step 305: Enter the fifth working mode.

[0103] The fifth working mode is to control the power output of the power generation subsystem 10 to be zero, and to control the load subsystem 30 and the energy storage subsystem 20 to be in a closed state.

[0104] In the embodiment of the present application, the energy storage subsystem 20 needs to provide working power to the power generation subsystem 10 so that the power generation subsystem 10 can operate normally. When the current remaining power value is less than or equal to the eighth threshold value, it indicates that the current remaining power of the energy storage subsystem 20 is very small, indicating that the power output of the current power generation subsystem 10 cannot meet the power demand of the load subsystem 30. Therefore, in the embodiment of the present application, by controlling the output power of the power generation subsystem 10 to zero, the power generation subsystem 10 can be prevented from consuming the electric energy stored in the energy storage subsystem 20, thereby preventing the electric energy in the energy storage subsystem 20 from being exhausted and improving the service life of the energy storage subsystem 20. In addition, when the output power of the power generation subsystem 10 is zero, it indicates that the power generation subsystem 10 is unable to provide electric energy to the load subsystem 30 and the energy storage subsystem 20. Therefore, in the implementation of the present application, by simultaneously controlling the load subsystem 30 and the energy storage subsystem 20 to be in a closed state, unnecessary power consumption can be avoided.

[0105] Step 306: Determine whether the current remaining power value is greater than the eighth threshold and less than the ninth threshold. If so, go to step 307; if not, go to step 308.

[0106] Among them, when the remaining power in the energy storage subsystem 20 is small, it indicates that the power output of the current power generation subsystem 10 is unstable and cannot continuously meet the power demand of the load subsystem 30. Therefore, by setting the energy management system 40 to enter the corresponding working mode, the power generated by the power generation subsystem 20 can be fully utilized and the impact of the unstable power output of the power generation subsystem 10 on the load subsystem 30 can be avoided. In the embodiment of the present application, by setting a ninth threshold, when the current remaining power value is greater than the eighth threshold and less than the ninth threshold, it indicates that the remaining power in the current energy storage subsystem 20 is small and the power output of the power generation subsystem 10 is relatively unstable. Among them, the ninth threshold is greater than the eighth threshold, and the ninth threshold can be set as needed, for example, 30% or 35%.

[0107] Step 307: Enter the sixth working mode.

[0108] The sixth working mode is to control the power generation subsystem 10 to charge the energy storage subsystem 20 and to control the load subsystem 30 to be in a closed state.

[0109] In the embodiment of the present application, when the current remaining power value is greater than the eighth threshold value and less than the ninth threshold value, it indicates that the energy storage subsystem 20 currently has a low remaining power level, indicating that the power output of the current power generation subsystem 10 is unstable and cannot continuously meet the power demand of the load subsystem 30. Therefore, by controlling the load subsystem 30 to be in a closed state, the power generation subsystem 10 is prevented from outputting large fluctuations in power to the load subsystem, thereby shortening the service life of the load subsystem 30. Furthermore, in the embodiment of the present application, by controlling the power generation subsystem 10 to charge the energy storage subsystem 20, the electrical energy generated by the power generation subsystem 10 is stored, thereby avoiding energy waste.

[0110] Step 308: Determine whether the load state is an idle state. If so, go to step 309; if not, go to step 313.

[0111] Step 309: Determine whether the current remaining power value is greater than or equal to the ninth threshold and less than the tenth threshold. If so, go to step 310; if not, go to step 312.

[0112] The tenth threshold is greater than the ninth threshold, and the tenth threshold can be set as needed, for example, 50% or 60%.

[0113] Step 310: Obtain the third historical working mode at the last moment.

[0114] In this step, the working mode of the energy management system 40 at the previous moment is obtained.

[0115] Step 311: Determine whether the third historical working mode is the sixth working mode. If yes, go to step 307; if no, go to step 312.

[0116] Step 312: Enter the seventh working mode.

[0117] The seventh working mode is to control the power generation subsystem 10 to charge the energy storage subsystem 20 .

[0118] Step 313: Enter the eighth working mode.

[0119] The eighth operating mode is as follows: if the real-time output power of the power generation subsystem 10 is greater than the real-time power of the load subsystem 30, the power generation subsystem 10 is controlled to provide power to the load subsystem 30 and charge the energy storage subsystem 20. If the real-time output power of the power generation subsystem 10 is equal to the real-time power of the load subsystem 30, the power generation subsystem 10 is controlled to provide power to the load subsystem 30. If the real-time output power of the power generation subsystem 10 is less than the real-time power of the load subsystem 30, the power generation subsystem 10 and the energy storage subsystem 20 are controlled to provide power to the load subsystem 30, and the operating power of the load subsystem 30 is set to a preset power. The preset power can be set as needed, for example, the maximum output power of the load subsystem 30.

[0120] In the implementation of this application, when the current remaining power value is greater than or equal to the ninth threshold value, it indicates that there is a large amount of remaining power in the current energy storage subsystem 20. Therefore, when the real-time output power of the power generation subsystem 10 is less than the real-time power of the load subsystem 30, power is provided to the load subsystem 30 by controlling the power generation subsystem 10 and the energy storage subsystem 20 to ensure that the load subsystem 30 can operate normally and there is no risk of the electric energy stored in the energy storage subsystem 20 being drained.

[0121] Among them, steps 309 to 312 are similar to steps 207 to 210, so the principles and specific implementation methods of steps 309 to 312 can refer to steps 207 to 210 and will not be repeated here.

[0122] In an embodiment of the present application, by dividing the working modes into eight, the working mode of the energy management system 40 is determined according to the current remaining power value, grid connection status and load status, so as to manage the power generation subsystem 10, the energy storage subsystem 20 and the load subsystem 30. Compared with the method of setting only a single working mode, the power generation subsystem 10, the energy storage subsystem 20 and the load subsystem 30 can be managed more finely, thereby reducing the waste of electric energy generated by the power generation subsystem 10, improving energy utilization efficiency, and avoiding frequent charging and discharging of the energy storage subsystem 20, thereby improving the service life of the energy storage subsystem 20.

[0123] At the same time, in the embodiment of the present application, since the operating data of the load subsystem 30 is also taken into consideration when determining the operating mode of the energy management system 40, real-time monitoring of voltage, current, and load demand is achieved, and different operating modes are entered according to the operating / idle status of the load subsystem 30, and the output power of the load subsystem 30 is adjusted through the corresponding operating mode, thereby achieving precise control of the load subsystem 30.

[0124] Furthermore, in the embodiment of the present application, by setting a working mode corresponding to the off-grid state, the reliability of the energy scheduling system 1 in the off-grid state is improved, so that when the energy storage subsystem 20 is in the off-grid state, the power supply of the load subsystem 30 can be continuously guaranteed.

[0125] An embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the above-mentioned energy scheduling method embodiment is implemented.

[0126] An embodiment of the present application provides a computer program, which can be executed by a processor to implement the above-mentioned energy scheduling method embodiment.

[0127] An embodiment of the present application provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the above-mentioned energy scheduling method embodiment.

[0128] In the several embodiments provided in this application, if any function is implemented in the form of a software function module / unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the technical solution of this application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server or other electronic device) to execute all or part of the steps of the method described in each embodiment of this application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store computer program code.

[0129] The algorithm or demonstration provided here are not inherently relevant to any particular computer, virtual system or other equipment. Various general purpose systems can also be used together with the teachings based on this. According to the above description, it is obvious that the structure required for constructing this type of system. In addition, the present application embodiment is not directed to any specific programming language yet. It should be understood that various programming languages ​​can be utilized to realize the content of the present application described here, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the present application.

[0130] It should be noted that the above embodiments illustrate rather than limit the present application, and that a person skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present application may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In claims that list several means, several units or modules of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments should not be understood as limiting the order of execution unless otherwise specified.

[0131] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An energy scheduling method, applied to an energy management system, wherein the energy management system is used to manage a power generation subsystem, an energy storage subsystem, and a load subsystem, characterized in that: The method comprises: Obtaining a current remaining power value and a grid connection status of the energy storage subsystem, wherein the grid connection status includes a grid-connected state and an off-grid state; Acquiring a load state of the load subsystem, wherein the load state includes a working state and an idle state; If the grid connection state is the grid-connected state and the load state is the idle state, then: When the current remaining power value is less than or equal to a first threshold, the first working mode is entered, wherein the first working mode is to control the power generation subsystem to charge the energy storage subsystem, and control the mains network to charge the energy storage subsystem according to the mains electricity price; When the current remaining power value is greater than the first threshold value and less than the second threshold value, obtaining the first historical operating mode at the previous moment; If the first historical operating mode is the second operating mode, then continue to enter the second operating mode, wherein the second operating mode is to control the power generation subsystem to charge the energy storage subsystem and the mains network to stop charging the energy storage subsystem; otherwise, then enter the first operating mode; When the current remaining power value is greater than or equal to the second threshold, entering the second working mode; If the grid connection state is the grid-connected state and the load state is the working state, then: When the current remaining power value is less than or equal to a third threshold value, wherein the third threshold value is less than the first threshold value, a third working mode is entered, wherein the third working mode is that if the real-time output power of the power generation subsystem is greater than the real-time power of the load subsystem, the power generation subsystem is controlled to provide power to the load subsystem and charge the energy storage subsystem; if the real-time output power of the power generation subsystem is equal to the real-time power of the load subsystem, the power generation subsystem is controlled to provide power to the load subsystem; if the real-time output power of the power generation subsystem is less than the real-time power of the load subsystem, the power generation subsystem and the mains network are controlled to provide power to the load subsystem; When the current remaining power value is greater than the third threshold and less than a fourth threshold, obtaining a second historical operating mode at a previous moment, wherein the fourth threshold is less than the first threshold; If the second historical operating mode is the third operating mode, then continue to enter the third operating mode; otherwise, enter the fourth operating mode, wherein the fourth operating mode is that if the real-time output power of the power generation subsystem is greater than the real-time power of the load subsystem, then control the power generation subsystem to provide power to the load subsystem and charge the energy storage subsystem; if the real-time output power of the power generation subsystem is equal to the real-time power of the load subsystem, then control the power generation subsystem to provide power to the load subsystem; if the real-time output power of the power generation subsystem is less than the real-time power of the load subsystem, then control the power generation subsystem and the energy storage subsystem to provide power to the load subsystem; When the current remaining power value is greater than or equal to the fourth threshold, the fourth working mode is entered.

2. The method according to claim 1, characterized in that When the energy management system enters the first working mode or the second working mode: Obtaining the current rechargeable power of the energy storage subsystem; If the current rechargeable power is greater than or equal to the rated power of the power generation subsystem, the maximum output power of the power generation subsystem is set to the rated power; If the current chargeable power is less than the rated power, the maximum output power of the power generation subsystem is set to the current chargeable power.

3. The method according to claim 1, characterized in that When the energy management system enters the third operating mode or the fourth operating mode: Obtaining the current rechargeable power of the energy storage subsystem; If the sum of the current rechargeable power and the real-time power of the load subsystem is greater than or equal to the rated power of the power generation subsystem, the maximum output power of the power generation subsystem is set to the rated power; If the sum is less than the rated power, the maximum output power of the power generation subsystem is set to the sum.

4. The method according to claim 1, wherein The method further comprises: In response to receiving a request to calibrate the energy storage subsystem, shutting down the load subsystem; If the current remaining power value is less than a fifth threshold, controlling the energy storage subsystem to discharge until the remaining power of the energy storage subsystem reaches a sixth threshold, and controlling the power generation subsystem to charge the energy storage subsystem until the stored power of the energy storage subsystem reaches a seventh threshold, so that the energy storage subsystem is calibrated, wherein the fifth threshold is greater than the sixth threshold, and the seventh threshold is greater than the fifth threshold; If the current remaining power value is greater than or equal to the fifth threshold, the power generation subsystem is controlled to charge the energy storage subsystem until the stored power of the energy storage subsystem reaches the seventh threshold, and the energy storage subsystem is controlled to discharge until the remaining power of the energy storage subsystem reaches the sixth threshold, so that the energy storage subsystem is calibrated.

5. The method according to claim 1, wherein The method further comprises: If the grid connection state is off-grid, then: When the current remaining power value is less than or equal to an eighth threshold, the fifth operating mode is entered, wherein the fifth operating mode is to control the output power of the power generation subsystem to be zero, and to control the load subsystem and the energy storage subsystem to be in a closed state; When the current remaining power value is greater than the eighth threshold and less than the ninth threshold, the sixth working mode is entered, wherein the sixth working mode is to control the power generation subsystem to charge the energy storage subsystem and control the load subsystem to be in a closed state.

6. The method according to claim 5, characterized in that The method further comprises: If the grid connection state is an off-grid state and the load state is an idle state, then: When the current remaining power value is greater than or equal to the ninth threshold value and less than the tenth threshold value, obtaining the third historical operating mode at the previous moment; if the third historical operating mode belongs to the sixth operating mode, continuing to enter the sixth operating mode; otherwise, entering the seventh operating mode, wherein the seventh operating mode is controlling the power generation subsystem to charge the energy storage subsystem; When the current remaining power value is greater than or equal to the tenth threshold, entering the seventh working mode; If the grid state is off-grid and the load state is working, then: When the current remaining power value is greater than or equal to the ninth threshold value, the eighth working mode is entered, wherein the eighth working mode is that if the real-time output power of the power generation subsystem is greater than the real-time power of the load subsystem, the power generation subsystem is controlled to provide power to the load subsystem and charge the energy storage subsystem; if the real-time output power of the power generation subsystem is equal to the real-time power of the load subsystem, the power generation subsystem is controlled to provide power to the load subsystem; if the real-time output power of the power generation subsystem is less than the real-time power of the load subsystem, the power generation subsystem and the energy storage subsystem are controlled to provide power to the load subsystem, and the working power of the load subsystem is set to a preset power.

7. An energy management system comprising a memory, a processor, and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the energy scheduling method according to any one of claims 1 to 6.

8. An energy scheduling system, characterized in that: The energy dispatching system includes a power generation subsystem, an energy storage subsystem, a load subsystem and the energy management system as claimed in claim 7.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the energy scheduling method according to any one of claims 1 to 6 is implemented.

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