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

Abstract

The invention relates to the technical field of energy scheduling, 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 the method comprises the following steps: obtaining a current residual electric quantity value and a power grid connection state of an energy storage subsystem and a load state of a load subsystem; if the power grid connection state is a grid-connected state and the load state is an idle state, entering a first working mode when the current residual electric quantity value is smaller than or equal to a first threshold value; when the current residual electric quantity value is greater than a first threshold value and less than a second threshold value, acquiring a 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 a first working mode; and when the current residual electric quantity value is greater than or equal to a second threshold value, entering a second working mode. The energy utilization efficiency is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of energy scheduling, 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 charging system, as a multi-energy complementary system integrating photovoltaic power generation, energy storage and charging for electric vehicles, has become a research hotspot in the field of smart energy. This system can not only realize the efficient use of green energy, but also effectively alleviate the burden on the power grid. The development of this system is closely related to photovoltaic power generation technology, energy storage subsystem and smart charging pile technology.

[0003] In recent years, the rapid popularization of electric vehicles around the world has put forward higher requirements for charging infrastructure. At the same time, the gradual decline in the cost of photovoltaic power generation technology and energy storage subsystems has made the application of photovoltaic energy storage charging pile systems in distributed energy systems attract much attention. How to optimize the energy scheduling strategy and coordinate the matching relationship between photovoltaic power generation subsystems, energy storage subsystems and charging needs, so as to improve the energy utilization efficiency of the system is a problem that needs to be solved. 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 existing 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 value and less than the second threshold value, the first historical working mode of 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 value, 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 also 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, wherein the third threshold is less than the first threshold, 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 city power 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 the fourth threshold , then obtain the second historical working mode of the previous moment, wherein the fourth threshold is less than the first threshold; 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, 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 manner, the method also 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 also 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 the 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 before the power failure 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.

[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 as described above.

[0013] According to another aspect of an embodiment of the present application, an energy scheduling system is provided, wherein the energy scheduling system 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 an embodiment 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 working mode of the previous moment and determining the working mode of the energy management system according to the historical working mode, it is avoided that the energy management system frequently switches between two different working 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 working modes, the service life of each subsystem in the energy scheduling system 1 can be improved.

[0016] Furthermore, 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 different working modes to manage the power generation subsystem, the energy storage subsystem and the load subsystem. Compared with only setting 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 life of the energy storage subsystem.

[0017] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it 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 embodiment 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 accompanying drawings. In the accompanying drawings: Figure 1 A schematic diagram of an energy scheduling system provided in an embodiment of the present application is shown; Figure 2 A schematic diagram of an energy management system provided by an embodiment of the present application is shown; Figure 3 A schematic diagram of a process flow of an energy scheduling method provided in an embodiment of the present application is shown; Figure 4 A flow chart of an energy scheduling method provided in another embodiment of the present application is shown. DETAILED DESCRIPTION

[0019] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the 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 by the embodiments set forth herein.

[0020] With the development of technology, the performance of new energy vehicles continues to improve, and the cost is gradually reduced, making the number of new energy vehicles more and more. Therefore, the demand for charging new energy vehicles is also increasing, which has accelerated the construction and upgrading of charging infrastructure to meet the growing charging demand. Due to the increasingly serious problem of energy shortage in the world, it is particularly necessary to develop and utilize green energy for power generation. In this context, the combination of photovoltaic power generation subsystem, energy storage subsystem and charging pile has become an ideal solution. Photovoltaic power generation subsystem converts solar energy into electrical energy, which is not only clean and pollution-free, but also inexhaustible. The energy storage subsystem can effectively store the electricity generated by photovoltaic power generation and provide the stored electricity to the charging pile to ensure the stability and reliability of the power supply. As a bridge connecting new energy vehicles and power supply, the charging pile provides charging services for new energy vehicles by using the electricity provided by the photovoltaic power generation subsystem and the energy storage subsystem, thus forming a closed-loop green energy ecosystem and promoting the sustainable development of society.

[0021] Since photovoltaic power generation subsystems convert solar energy directly into electrical energy through solar cells, their power generation is affected by light intensity and ambient temperature, and is intermittent and fluctuating. The energy storage subsystem can store the electrical energy generated by the power generation subsystem, and can also provide its stored electrical 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 fast response characteristics, and the charging and discharging strategy of the energy storage subsystem directly affects its overall performance and life. Therefore, how to comprehensively control and optimize the power generation subsystem, energy storage subsystem and load subsystem (such as charging piles) to schedule energy and ensure the balance between economy and reliability is a problem that needs to be solved.

[0022] If the power generation subsystem is used preferentially to provide electrical energy to the load subsystem, when the power 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.

[0023] 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.

[0024] Figure 1 FIG. 1 is a schematic diagram of an energy scheduling system provided in an embodiment of the present application. 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 refers to a subsystem that can store energy and can provide its stored energy to the load subsystem. The load subsystem 30 refers to a system that consumes energy, such as a charging pile.

[0025] For example, the power generation subsystem 10 is a photovoltaic power generation subsystem and the load subsystem 30 is a charging pile. After the photovoltaic power generation subsystem converts solar energy into electrical energy, the electrical energy can be stored in the energy storage subsystem 20, or the electrical energy can be directly provided to the charging pile. The electrical energy stored in the energy storage subsystem 20 can be provided to the charging pile for use.

[0026] 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.

[0027] Figure 2 FIG. 1 is 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 .

[0028] The memory 44 is used to store a computer program 46. The memory 44 may include a high-speed RAM memory, and 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.

[0029] The processor 42 is used to execute the computer program 46 to implement the energy scheduling method provided in the following embodiments.

[0030] The processor 42 may be a central processing unit (CPU), or 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 the energy management system 40 may be processors of the same type, such as one or more CPUs; or may be processors of different types, such as one or more CPUs and one or more ASICs.

[0031] Figure 3 FIG. 4 is a flow chart showing an energy scheduling method provided in an embodiment of the present application, which is executed by an energy management system 40. Figure 3 As shown, the method comprises the following steps: Step 201: Acquire the current remaining power value and grid connection status of the energy storage subsystem 20.

[0032] As described above, the energy storage subsystem 20 can store the electric energy generated by the power generation subsystem 10, and can also provide electric energy to the load subsystem 30. The current remaining power value refers to the electric energy capacity stored in the energy storage subsystem 20 at the current moment, which can be expressed in terms of the state of charge (SOC). Usually, the SOC ranges from 0 to 1. When the SOC is 0, it means that the energy storage subsystem 20 is fully discharged, and when the SOC is 1, it means that the energy storage subsystem 20 is fully charged.

[0033] 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 a grid-connected state, it indicates that the energy storage subsystem 20 is normally connected to the grid and can receive the electric energy provided by the grid. When the grid connection status of the energy storage subsystem 20 is an off-grid state, it indicates that the energy storage subsystem 20 is disconnected from the grid and cannot receive the electric energy provided by the grid. In this step, the grid connection status of the energy storage subsystem 20 at the current moment is obtained.

[0034] Step 202 : Obtain the load status of the load subsystem 30 .

[0035] The load state of the load subsystem 30 includes a working state and an idle state. Taking the load subsystem 30 as a charging pile as an example, when the charging pile is charging a new energy vehicle, the charging pile is in a working state; when the charging pile is not charging a new energy vehicle, the charging pile is in an idle state.

[0036] Step 203: Determine whether the grid connection state is a grid-connected state. If yes, go to step 204.

[0037] Step 204: Determine whether the load state is an idle state. If yes, go to step 205; if no, go to step 211.

[0038] Step 205: Determine whether the current remaining power value is less than or equal to the first threshold value. If yes, go to step 206; if no, go to step 207.

[0039] Among them, since 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 for charging 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 subsequent energy storage subsystem 20 can 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 the current demand for charging the load subsystem 30 is relatively small.

[0040] Therefore, in the embodiment of the present application, by setting the first threshold, it is determined whether the remaining power in the current energy storage subsystem 20 is sufficient according to 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 current energy storage subsystem 20 is small, and when the current remaining power value is greater than the first threshold, it indicates that the remaining power in the current energy storage subsystem 20 is relatively sufficient. The first threshold can be set as needed, such as 43% or 45%.

[0041] Step 206: Enter the first working mode.

[0042] Among them, 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.

[0043] Specifically, controlling the mains network to charge the energy storage subsystem 20 according to the mains electricity price means that if the mains electricity price is low (e.g., at a valley electricity price), the amount of electricity charged by the mains network to the energy storage subsystem 20 is increased, and when the mains electricity price is high (e.g., at a peak electricity price), the amount of electricity charged by the mains network to the energy storage subsystem 20 is reduced. By controlling the amount of electricity charged by the mains network to the energy storage subsystem 20 according to the mains electricity price, the cost of electricity consumption can be reduced.

[0044] 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 electric energy stored in the energy storage subsystem 20 at the current moment is small. Therefore, when the load subsystem 30 is in an idle state and the energy storage subsystem 20 is in a grid-connected state, the electric 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 price, so that when the load subsystem 30 is in a working state and the electric energy provided by the power generation subsystem 10 cannot meet the needs of the load subsystem 30, the energy storage subsystem 20 can be used to provide electric energy to the load subsystem 30 to ensure that the load subsystem 30 can work normally. And by controlling the power generation subsystem 10 to charge the energy storage subsystem through the energy management system 40, the electric energy generated by the current power generation subsystem 10 can be stored to avoid waste.

[0045] In some embodiments, when the energy management system 40 enters the first working 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 the 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 charge the energy storage subsystem 20 at the same time. 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.

[0046] Step 207: Determine whether the current remaining power value is greater than the first threshold and less than the second threshold. If yes, go to step 208; if no, go to step 210.

[0047] Among them, when the energy storage subsystem 20 is in a charging state, it will also consume a certain amount of electric energy, so the amount of electric energy of the energy storage subsystem 20 is fluctuating. Therefore, if the working mode of the energy management system 40 is determined only according to 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. 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 working mode A, and when the current remaining power value is greater than or equal to the threshold, the energy management system 40 enters working mode B, since the energy storage subsystem 20 will also consume a certain amount of electric energy 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 consumption when the energy storage subsystem 20 is in a working state, then the current remaining power value will be less than the threshold, resulting in the problem of frequent switching between working mode A and working mode B of the energy management system 40, causing unnecessary energy consumption and reducing the service life of each subsystem.

[0048] Therefore, in the embodiment of the present application, by setting the second threshold value so that the first threshold value and the second threshold value constitute a buffer zone, when the current remaining power value belongs to the interval formed by the first threshold value and the second threshold value, by obtaining the historical working mode of the energy management system 40 at the last moment, and then determining the working mode of the energy management system 40 according to 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 first threshold value. Among them, the second threshold value is greater than the first threshold value, and the second threshold value can be set as needed, such as 48% or 50%.

[0049] Step 208: Obtain the first historical working mode at the last moment.

[0050] In this step, the working mode of the energy management system 40 at the previous moment is obtained.

[0051] In an embodiment of the present application, when the current remaining power value is greater than the first threshold and less than the second threshold, 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.

[0052] 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.

[0053] 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 city power network stops charging the energy storage subsystem 20 .

[0054] 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.

[0055] Step 210: Enter the second working mode.

[0056] 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 no, go to step 213.

[0057] Among them, when the load subsystem 30 is in working state, if the electric energy 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 supplement the load subsystem 30 with electric energy, if the remaining power in the energy storage subsystem 20 is small, the energy storage subsystem 20 may be drained, thereby affecting the service life of the energy storage subsystem 20. Therefore, in order to avoid 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 according to the magnitude 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 means that there is less remaining power in the current energy storage subsystem 20, and there may be a risk of draining power. By setting the energy management system 40 to enter the corresponding working mode, the energy storage subsystem 20 is avoided from being drained. Among them, the third threshold is less than the first threshold. The third threshold can be set as needed, for example, 18% or 20%.

[0058] Step 212: Enter the third working mode.

[0059] 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.

[0060] Among them, the real-time output power of the power generation subsystem 10 refers to the electric 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 will be different under different environmental factors. 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 when the charging pile charges 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.

[0061] Specifically, when the energy management system 40 enters the third working mode, if the real-time output power of the current 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 making full use of the electric energy generated by the power generation subsystem 10 to avoid waste. For example, if the output power of the current power generation subsystem 10 is P1, and the current power of the load subsystem 30 is P2 (and P1>P2), the energy management system 40 controls the power provided by the power generation subsystem 10 to the load subsystem 30 to be 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 provided by the power generation subsystem 10 to the energy storage subsystem 20 to be P1-P2, and if the current chargeable power of the energy storage subsystem 20 is P3 (and P3<(P1-P2)), the energy management system 40 controls the power provided by the power generation subsystem 10 to the energy storage subsystem 20 to be P3.

[0062] If the current 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, thereby making full use of the electric energy generated by the power generation subsystem 10 and avoiding waste. For example, if the current output power of the power generation subsystem 10 is P4, and the current power of the load subsystem 30 is P4, the energy management system 40 controls the power provided by the power generation subsystem 10 to the load subsystem 30 to be P4.

[0063] 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 mains network to provide power to the load subsystem 30, thereby ensuring that the load subsystem 30 can operate normally. 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 (and P5<P6), the energy management system 40 controls the power generation subsystem 10 to provide the load subsystem 30 with P5, and controls the mains network to provide the load subsystem 30 with P6-P5.

[0064] In the embodiment of the present application, when the energy management system 40 enters the third working mode, it means that the electric energy stored in the energy storage subsystem 20 is less (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 AC power 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 increasing the service life of the energy storage subsystem 20.

[0065] In some embodiments, when the energy management system 40 enters the second operation mode or the third operation mode, the output power of the load subsystem 30 is set to its rated maximum power.

[0066] Step 213: Determine whether the current remaining power value is greater than the third threshold value and less than the fourth threshold value. If yes, go to step 214; if no, go to step 216.

[0067] Among them, as described above, if the working mode of the energy management system 40 is determined only according to 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 the embodiment of the present application, by setting the 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 last moment, and then determining the working mode of the energy management system 40 according to the historical working mode, it can be avoided that when the current remaining power value fluctuates above and below the third threshold value, the energy management system 40 frequently switches between two different working modes. Among them, the fourth threshold value is greater than the third threshold value, and the fourth threshold value can be set as needed, such as 38% or 40%.

[0068] Step 214: Obtain the second historical working mode at the previous moment.

[0069] In this step, the working mode of the energy management system 40 at the previous moment is obtained.

[0070] Step 215: Determine whether the second historical working mode is the third working mode. If yes, go to step 212; if no, go to step 216.

[0071] Step 216: Enter the fourth working mode.

[0072] 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.

[0073] 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.

[0074] In some embodiments, when the energy management system 40 enters the fourth operation mode, the output power of the load subsystem 30 is set to its rated maximum power.

[0075] Among them, step 211 to step 216 are similar to step 205 to step 210. Therefore, the principles and implementation methods of step 211 to step 216 can refer to step 205 to step 210 and will not be repeated here.

[0076] 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 working mode of the previous moment and determining the working mode of the energy management system 40 according to the historical working mode, it is avoided that the energy management system 40 frequently switches between two different working modes when the power of the energy storage subsystem 20 fluctuates, thereby avoiding unnecessary energy consumption and improving energy utilization efficiency. In addition, by avoiding frequent switching of the energy management system 40 between two different working modes, the service life of each subsystem in the energy scheduling system 1 can be improved.

[0077] Furthermore, 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 only setting 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 frequent charging and discharging of the energy storage subsystem 20 can be avoided, thereby extending the battery life of the energy storage subsystem.

[0078] In some embodiments, when the energy management system 40 enters the first working mode or the second working 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. Among them, 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 better.

[0079] 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, when the power generation subsystem 10 charges the energy storage subsystem 20, the electric energy generated by the power generation subsystem 10 can be fully utilized to avoid 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, when the power generation subsystem 10 charges the energy storage subsystem 20, damage to the energy storage subsystem 20 due to overcharging can be avoided, thereby ensuring the safe operation of the energy storage subsystem 20 and extending its service life.

[0080] In some embodiments, when the energy management system 40 enters the third working mode or the fourth working 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.

[0081] For example, 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. If P7+P8≥P9, the maximum output power of the power generation subsystem 10 is set to P9. If P7+P8<P9, the maximum output power of the power generation subsystem 10 is set to P7+P8.

[0082] 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.

[0083] The energy storage subsystem 20 includes an SOC determination module for determining the SOC of the energy storage subsystem 20 in real time. As time goes by, the performance of the battery 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 also includes: Step a1: in response to receiving a request to calibrate the energy storage subsystem 20 , shutting down the load subsystem 30 .

[0084] The request for calibrating the energy storage subsystem 20 refers to a request for calibrating the SOC determination module in the energy storage subsystem 20. In the embodiment of the present application, when the SOC determination module is calibrated, the load subsystem 30 is turned off to avoid the SOC determination module providing power to the load subsystem 30 during the calibration process, thereby ensuring that the SOC determination module can be calibrated smoothly.

[0085] 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.

[0086] The fifth threshold is greater than the sixth threshold, and the seventh threshold is greater than the fifth threshold. The fifth threshold, the sixth threshold, and the seventh threshold 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%.

[0087] 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.

[0088] In the embodiment of the present application, after the charge and discharge depth of the energy storage subsystem 20 is controlled to 100%, that is, after a complete charge and discharge process of the energy storage subsystem 20 is performed, the SOC determination module in the energy storage subsystem 20 can be triggered for calibration. In the embodiment of the present application, by obtaining the current remaining power value, and according to the magnitude relationship between the current remaining power value and the fifth threshold, it is determined whether to charge or discharge the energy storage subsystem 20 first, thereby reducing the wasted electric energy. Specifically, if the current power of the energy storage subsystem 20 is relatively large (that is, the current remaining power value is greater than or equal to the fifth threshold), by first charging the energy storage subsystem 20 and then controlling the energy storage subsystem 20 to discharge, rather than first controlling the energy storage subsystem 20 to discharge and then charging the energy storage subsystem 20, the power provided by the power generation subsystem 10 to the energy storage subsystem 20 can be reduced, thereby reducing the waste of electric energy and improving the energy utilization efficiency. If the current power of the energy storage subsystem 20 is small (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, thereby reducing the electric energy released when the energy storage subsystem 20 is discharged, reducing electric energy waste, and improving energy utilization efficiency.

[0089] Figure 4 FIG. 2 shows a flow chart of an energy scheduling method provided by another embodiment of the present application. Figure 4 As shown, the method comprises the following steps: Step 301: Obtain the current remaining power value and grid connection status of the energy storage subsystem 20.

[0090] Step 302 : Obtain the load status of the load subsystem 30 .

[0091] Step 303: Determine whether the grid connection state is a grid-connected state. If not, go to step 304.

[0092] Among them, step 301 to step 303 are the same as step 201 to step 203, so the principles and specific implementation methods of step 301 to step 303 can refer to step 201 to step 203.

[0093] Step 304: Determine whether the current remaining power value is less than or equal to the eighth threshold value. If yes, go to step 305; if no, go to step 306.

[0094] Among them, when the energy storage subsystem 20 is in an off-grid state, it cannot obtain electric energy from the power grid, and it needs to provide working power to the power generation subsystem 10. Therefore, when there is very little power remaining in the energy storage subsystem 20, 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 the embodiment of the present application, by setting the eighth threshold, it is determined whether the remaining power in the current energy storage subsystem 20 is very little according to the magnitude 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 means that the remaining power in the current energy storage subsystem 20 is very little, and then the energy management system 40 is set to enter the corresponding working mode to avoid the situation where the energy in the energy storage subsystem is drained. Among them, the eighth threshold can be set as needed, such as 4% or 5%.

[0095] Step 305: Enter the fifth working mode.

[0096] 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.

[0097] 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 work 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 avoiding the emptying of the electric energy in the energy storage subsystem 20 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 means that the power generation subsystem 10 cannot 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.

[0098] Step 306: Determine whether the current remaining power value is greater than the eighth threshold value and less than the ninth threshold value. If yes, go to step 307; if no, go to step 308.

[0099] Among them, when the remaining power in the energy storage subsystem 20 is small, it means 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 electric energy generated by the power generation subsystem 20 can be fully utilized, and the load subsystem 30 can be prevented from being affected by the unstable power output of the power generation subsystem 10. In the embodiment of the present application, by setting the ninth threshold, when the current remaining power value is greater than the eighth threshold and less than the ninth threshold, it means 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, such as 30% or 35%.

[0100] Step 307: Enter the sixth working mode.

[0101] The sixth working mode is to control the power generation subsystem 10 to charge the energy storage subsystem 20 and control the load subsystem 30 to be in a closed state.

[0102] 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 current remaining power of the energy storage subsystem 20 is small, 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 a large fluctuation of power to the load subsystem and shortening the service life of the load subsystem 30. In addition, in the embodiment of the present application, by controlling the power generation subsystem 10 to charge the energy storage subsystem 20, the electric energy generated by the power generation subsystem 10 is stored to avoid energy waste.

[0103] Step 308: Determine whether the load state is an idle state. If yes, go to step 309; if no, go to step 313.

[0104] 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 yes, go to step 310; if no, go to step 312.

[0105] The tenth threshold is greater than the ninth threshold, and the tenth threshold can be set as needed, such as 50% or 60%.

[0106] Step 310: Obtain the third historical working mode at the last moment.

[0107] In this step, the working mode of the energy management system 40 at the previous moment is obtained.

[0108] 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.

[0109] Step 312: Enter the seventh working mode.

[0110] Among them, the seventh working mode is to control the power generation subsystem 10 to charge the energy storage subsystem 20.

[0111] Step 313: Enter the eighth working mode.

[0112] Among them, the eighth 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 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 working power of the load subsystem 30 is set to the preset power. Among them, the preset power can be set as needed, such as the maximum output power of the load subsystem 30.

[0113] In the implementation of this application, when the current remaining power value is greater than or equal to the ninth threshold value, it means that there is a lot 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, the power generation subsystem 10 and the energy storage subsystem 20 are controlled to provide power to the load subsystem 30 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 exhausted.

[0114] Among them, step 309 to step 312 are similar to step 207 to step 210, so the principles and specific implementation methods of step 309 to step 312 can refer to step 207 to step 210, and will not be repeated here.

[0115] In the 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, the grid connection status and the 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, avoiding frequent charging and discharging of the energy storage subsystem 20, and improving the service life of the energy storage subsystem 20.

[0116] 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 state 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.

[0117] Furthermore, in the embodiment of the present application, by setting a working mode corresponding to the off-grid state, the reliability of the energy dispatching 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.

[0118] An embodiment of the present application provides a computer-readable storage medium, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the above-mentioned energy scheduling method embodiment is implemented.

[0119] 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.

[0120] 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, the above-mentioned energy scheduling method embodiment is implemented.

[0121] In several embodiments provided in the present 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 the present 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 a computer device (which can be a personal computer, server or other electronic device) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (RandomAccess Memory, RAM), disk or optical disk and other media that can store computer program codes.

[0122] The algorithm or display provided here are not inherently related to any specific computer, virtual system or other equipment. Various general systems can also be used together with the teaching based on this. According to the above description, it is obvious to construct the structure required for 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 to disclose the best mode of implementation of the present application.

[0123] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be constructed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. The present application may be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In the claims that list several devices, several units or modules in these devices may be embodied by the same hardware item. 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, unless otherwise specified, should not be understood as limitations on the order of execution.

[0124] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached 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: Acquire the current remaining power value and grid connection status of the energy storage subsystem, wherein the grid connection status includes a grid-connected state and an off-grid state; Acquire 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 a grid-connected state and the load state is an idle state, then: When the current remaining power value is less than or equal to the 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 working mode at the previous moment; If the first historical working mode is the second working mode, then continue to enter the second working mode, wherein the second working 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 working mode; When the current remaining power value is greater than or equal to the second threshold, the second 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 chargeable power of the energy storage subsystem; If the current chargeable 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 The method further comprises: 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, 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 working mode at a previous moment, wherein the fourth threshold is less than the first threshold; 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 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 energy storage subsystem are controlled 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.

4. The method according to claim 3, characterized in that When the energy management system enters the third working mode or the fourth working mode: Obtaining the current chargeable 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.

5. The method according to claim 1, characterized in that 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 the fifth threshold, the energy storage subsystem is controlled to discharge until the remaining power of the energy storage subsystem reaches a sixth threshold, and the power generation subsystem is controlled 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.

6. The method according to claim 1, characterized in that 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 the eighth threshold, the fifth working mode is entered, wherein the fifth working mode is to control the output power of the power generation subsystem to be zero, and 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 the ninth threshold value, 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.

7. The method according to claim 6, 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, the third historical working mode of the previous moment is obtained; if the third historical working mode belongs to the sixth working mode, the sixth working mode is continued to be entered; otherwise, the seventh working mode is entered, 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, 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.

8. 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 described in any one of claims 1 to 7.

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

10. 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 described in any one of claims 1 to 7 is implemented.

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