Power adjustment method, equipment, and storage medium

Abstract

A power adjustment method includes the steps of selectively obtaining interface output information corresponding to each of a photovoltaic power generation module interface, a load module interface, and a power grid module interface according to a current operation mode of a power management system; determining a target call output; determining a power shortage output or a power surplus output according to the target call output, and causing the energy storage module interface to supply energy according to the power shortage output or absorb energy according to the power surplus output.

Description

[Technical Field]

[0001] This application relates to the field of household energy storage technology, and more specifically, to a method for adjusting power consumption. , electric Regarding sub-devices and storage media. [Background technology]

[0002] The global energy crisis is intensifying day by day, encouraging the development of the home energy storage market. Following the decline in battery costs, the economic viability of home energy storage equipment has become more apparent, further strengthening the trend of residents installing energy storage systems. The energy management system in an energy storage system is the core of the entire home energy storage equipment. By controlling the direction and magnitude of energy flow under different operating conditions, it rationally schedules local energy to ensure the availability and economic efficiency of home energy storage equipment. However, conventional energy management systems engage the operating states and energy flow management of various devices accessed by the energy management system to form an integrated control logic. The complexity of this control logic becomes extremely complex as the number of devices accessed by the energy management system and the energy adjustment modes increase, making maintenance and management difficult. That was what the inventor was aware of. . [Overview of the Initiative] [Problems that the invention aims to solve]

[0003] In light of the above issues, this application proposes a power adjustment method , electric We propose a sub-device and a storage medium. [Means for solving the problem]

[0004] BookEmbodiments of the Application provide a power adjustment method applied to a power management system, the power management system used to manage power output for power between a photovoltaic module interface, an energy storage module interface, a load module interface and a power grid module interface, the method comprising: selectively acquiring interface output information corresponding to each of the photovoltaic module interface, the load module interface and the power grid module interface, depending on the current operating mode of the power management system, wherein the interface output information includes the magnitude of the interface output and the flow direction of the interface output; determining a target call output in the power management system based on the magnitude of the interface output and the flow direction of the interface output in the interface output information corresponding to each selectively acquired interface, wherein the target call output is an output that the power management system requests from the energy storage module interface to supply or absorb energy; determining a power deficit or surplus power output of the power management system based on the target call output, and further calling the energy storage module interface to supply energy according to the power deficit or absorb energy according to the surplus power output.

[0018] Book Embodiments of the invention provide an electronic device comprising one or more processors, memory, and one or more application programs stored in the memory and configured to be executed by the one or more processors, and configured to perform the power adjustment method according to the first embodiment.

[0019] BookAn exemplary embodiment provides a computer-readable storage medium, in which program code is stored, and the program code can be called by a processor to execute the power adjustment method according to the first aspect.

Advantages of the Invention

[0020] The means according to the present application determines interface output information corresponding to a plurality of module interfaces in a power management system according to different operation modes, determines a target call output in the power management system according to the interface output information, and finally determines whether to obtain insufficient power from an energy storage module interface or transport surplus power to the energy storage module interface according to the target call output. By determining the control logic of the power management system according to different operation modes, the adverse effects of the integrated control logic are avoided. In addition, the control logics of the operation mode and the module interface are independent of each other, and with the increase of the operation mode or the module interface, the conventional control logic is not affected, improving the scalability of the power management system.

Brief Description of the Drawings

[0021] To more clearly illustrate the technical solution means of the embodiments of the present application, the drawings required for use in the embodiments are briefly described below. It is clear that the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work. <00....​​​​​​​​​​​​ [Figure 5] It is a flowchart showing the installation of the battery charge / discharge output of the energy storage module interface of the energy storage system according to an embodiment of the present application. [Figure 6] It is an energy interaction diagram showing a plurality of module interfaces in the energy storage system in the self-generation and self-consumption mode. [Figure 7] It is an energy interaction diagram showing a plurality of module interfaces in the energy storage system in the peak cut bottom fill mode. [Figure 8] It is an energy interaction diagram showing a plurality of module interfaces in the energy storage system in the energy storage priority mode. [Figure 9] It is a structural block diagram showing a power adjustment device according to an embodiment of the present application. [Figure 10] It is a structural block diagram showing an electronic device for executing the power adjustment method according to an embodiment of the present application. [Figure 11] It shows a storage medium storing or carrying program code for realizing the power adjustment method according to an embodiment of the present application.

Mode for Carrying Out the Invention

[0022] For those skilled in the art to better understand the means of the present application, the technical means in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0023] Referring to Figure 1, which is a block diagram of the equipment in an energy storage system, the energy storage system mainly consists of a battery pack with a Battery Management System (BMS) function, a Power Conversion System (PCS), solar panels, a monitoring front end, and a monitoring back end. The PCS consists of a PV controller (photovoltaic charge controller), an AC / DC bidirectional converter (AC-DC bidirectional converter), and a DC-DC bidirectional converter (DC bidirectional converter). The PV controller is used to transport energy from the solar panels to the PCS, the AC / DC bidirectional converter is used to complete the energy exchange between the PCS and the power grid, and the DC-DC bidirectional converter is used to complete the energy exchange between the PCS and the battery pack. Although the solar panels are an energy source and constantly release energy to the system, their energy intensity is affected by the intensity of sunlight, and the constant stability of their energy cannot be guaranteed. The household load may be household appliances such as refrigerators and washing machines connected to the AC circuit when using the household energy storage system, and their energy is mainly obtained from the battery pack, solar panels, or the power grid. The battery pack serves as a stable energy supply for the system, capable of both releasing and absorbing energy, and acts as the central hub for energy regulation. Adjusting the battery pack's energy output is used to ensure system stability. The power grid is the backup energy source for the entire system; in the event of a system energy shortage, energy can be absorbed from the power grid to ensure the stability of the energy storage system. The monitoring front end is primarily used to monitor energy flow and energy exchange in the energy storage system. The monitoring back end is primarily used to monitor energy data in the energy storage system. The roles of the monitoring front end and monitoring back end are not specifically limited here.

[0024]

number

[0025] Refer to Figure 3, which is a flowchart of the grid connection behavior in self-consumption mode. The control method shown in Figure 3 is a typical control method for energy management systems and will be explained in detail below.

[0026] At the start of the program, it is necessary to determine whether the power grid connection is normal and whether the photovoltaic module interface is functioning correctly in the grid-connected mode with the power grid connected. If the photovoltaic module interface is successfully connected, the PV controller can be started to limit the power input through the photovoltaic module interface, and the AC / DC converter can be started to perform the conversion between alternating current and direct current in the energy storage system.

[0027] If the solar power generation is greater than the load power, the system determines whether the battery pack at the energy storage module interface in the energy storage system is fully charged. If the battery pack is fully charged, the DC-DC bidirectional converter remains in standby mode and does not participate in operation. Furthermore, the surplus power generated at the solar power module interface is converted to alternating current by the AC-DC bidirectional converter and then transported to the power grid module interface. If the battery pack is not fully charged, the DC-DC bidirectional converter begins converting the DC current generated at the solar power module interface to a DC current acceptable to the battery pack, i.e., charging the battery pack. If the solar power generation is greater than the sum of the load power and the charging power, the surplus power is transported to the power grid module interface. If the solar power generation is less than the sum of the load power and the charging power, no further processing is performed.

[0028] If the solar power generation is below the load power, the system determines whether the battery pack of the energy storage module interface is in a power shortage state. If it is in a power shortage state, the power grid interface supplies the insufficient solar power to the load module interface, and the DC-DC bidirectional converter remains in standby mode, preventing the battery pack from discharging. If it is not in a power shortage state, the DC-DC bidirectional converter is activated, the battery pack discharges, and the insufficient solar power is replenished. At this time, the system determines whether the energy storage module interface output meets the load power requirements. If it cannot, the power grid module interface replenishes the insufficient power, thereby maintaining the operation of the load module interface. If satisfied, the solar power module interface and the energy storage module interface continue to supply power to the load module interface.

[0029] After the solar power module interface receives an abnormal signal and activates the AC / DC controller, it determines whether the battery pack is underpowered. If it is underpowered, the power grid module interface supplies power to the load module interface, and the DC / DC bidirectional converter enters standby mode. If the battery pack is not underpowered, the DC / DC bidirectional converter is activated, the battery pack discharges, and thus provides energy to the load module interface. At this time, it determines whether the power of the energy storage module interface is sufficient to meet the load power requirements. If it cannot, the power grid module interface provides the remaining power, thereby maintaining the operation of the load module interface. If it can meet the requirements, the energy storage module interface continues to supply power to the load module interface.

[0030] The means shown in Figure 3 above is an energy control means that uses a conventional energy management system for grid connection behavior in self-consumption mode. As can be seen from the detailed analysis above, this means combines the power control management of each module between the photovoltaic module, battery module, load module, and power grid module with the operating state management of each module to form an integrated control logic. Such a control logic is extremely complex and difficult to debug. Moreover, this means is only for grid connection mode in self-consumption mode and does not consider the control logic for peak cut bottom fill mode or energy storage priority mode. If the control logic for different modes is supplemented in the integrated control logic, the complexity of the integrated control logic increases exponentially, which is extremely disadvantageous for later management and maintenance. Furthermore, if a single point failure occurs in the integrated control logic, the entire energy management system will not be able to operate, and the robustness of the integrated control logic is generally poor.

[0031] Regarding the technical problems proposed in the background technology and the above problems, this application This invention proposes a power adjustment method, apparatus, electronic equipment, and storage medium, which determine interface output information corresponding to multiple module interfaces in a power management system according to different operating modes, determine the target call output in the power management system according to the interface output information, and finally decide whether to acquire insufficient power from the energy storage module interface or transport surplus power to the energy storage module interface according to the target call output, thereby determining the control logic of the power management system according to different operating modes, thereby avoiding the adverse effects of integrated control logic, and furthermore, the control logic of the operating modes and module interfaces are independent of each other, and the scalability of the power management system is improved without affecting the conventional control logic as the number of operating modes or module interfaces increases.

[0032] Referring to Figure 4, which is a schematic flowchart showing a power adjustment method according to one embodiment of the present invention. In a specific embodiment, the power adjustment method is used in an electronic device 100 to which the power adjustment device 300 is set, as shown in Figure 9.

[0033] The procedure shown in Figure 4 will be described in detail below, and the power adjustment method specifically includes the following steps.

[0034] Step S110: Selectively acquire interface output information corresponding to the photovoltaic module interface, the load module interface, and the power grid module interface, respectively, depending on the current operating mode of the power management system, wherein the interface output information includes the magnitude of the interface output and the flow direction of the interface output.

[0035] The power management system is used to manage power output between the solar power module interface, energy storage module interface, load module interface, and power grid module interface.

[0036] A solar power module interface refers to the interface through which a solar power module accesses a power management system. By obtaining interface output information from the solar power module interface, the current actual output of the solar power module can be obtained, including the magnitude and flow direction of the interface output. In some embodiments, the flow direction of the interface output of the solar power module interface can be represented by the positive or negative sign of the current actual output of the solar power module. If the obtained current actual output of the solar power module interface is a positive number, it means that the flow direction of the interface output of the solar power module interface is from the solar power module to the power management system. Since a solar power module is a power generation device, the current actual output of the solar power module interface will not be negative under normal circumstances. Therefore, if the obtained current actual output of the solar power module interface is a negative number, it indicates that there is a problem with the solar power module.

[0037] An energy storage module interface refers to an interface through which an energy storage module accesses a power management system. The energy storage module is used to store power, and may specifically be a battery, such as a lithium battery or sodium battery. The current actual output of the energy storage module interface can be obtained by acquiring interface output information at the energy storage module interface, including the magnitude and flow direction of the interface output. In some embodiments, the flow direction of the interface output of the energy storage module interface can be represented by the positive or negative sign of the current actual output of the energy storage module. A positive number indicates that the energy storage module is in a charging state, and the flow direction of the interface output is from the power management system to the energy storage module. A negative number indicates that the energy storage module is in a discharging state, and the flow direction of the interface output is from the energy storage module to the power management system.

[0038] A load module interface refers to the interface through which a load module accesses a power management system. A load module is a collective term for one or more load devices that operate using power accessed by the power management system. By obtaining interface output information at the load module interface, the current actual output of the load module interface can be obtained, including the magnitude and flow direction of the interface output. In some embodiments, the flow direction of the interface output of the load module interface can be represented by the positive or negative sign of the current actual output of the load module. If the obtained current actual output of the load module interface is a positive number, the flow direction of the interface output of the load module interface is from the power management system towards the load module. Since a load module is a power-consuming device, the current actual output of the load module interface is not negative under normal circumstances. Therefore, if the obtained current actual output of the load module interface is a negative number, it indicates that there is a problem with the load module.

[0039] A power grid module interface refers to the interface through which a power grid module accesses a power management system, and the power grid may be a tram power grid. The current actual output of the power grid module interface can be obtained by acquiring interface output information at the power grid module interface, which includes the magnitude and flow direction of the interface output. In some embodiments, the flow direction of the interface output of the power grid module interface can be represented by the positive or negative sign of the current actual output of the power grid module. If the acquired current actual output of the power grid module interface is a positive number, the power grid module is in an absorbing state, and the flow direction of the interface output of the power grid module interface is from the power management system towards the power grid module. If the acquired current actual output of the power grid module interface is a negative number, the power grid module is in a discharging state, and the flow direction of the interface output of the power grid module interface is from the power grid module towards the power management system.

[0040] In some embodiments, if a failure occurs in the energy storage module interface, the maximum charge output and maximum discharge output of the energy storage module interface are set to 0. If the energy storage capacity of the energy storage module interface exceeds a first preset value, the maximum charge output of the energy storage module interface is set to 0. If the energy storage capacity of the energy storage module interface is lower than a second preset value, the maximum discharge output of the energy storage module interface is set to 0. The maximum charge output may be the maximum allowable charge power of the energy storage module, specifically the maximum allowable charge power of the battery, and the maximum discharge output may represent the maximum discharge output of the energy storage module, specifically the maximum discharge output of the battery.

[0041] If the energy storage module interface fails, the energy storage module interface will not be able to transport power to or from the power management system. When the energy storage module interface fails, it is possible that the interface itself may fail, the energy storage equipment may fail, and the DC-DC bidirectional converter may fail. It is important to understand that the above types of energy storage module interface failures are merely examples. application This does not limit the specific circumstances under which a failure occurs in the energy storage module interface. application The power management system sets the maximum charge output and maximum discharge output of the energy storage module interface to 0. At this time, the energy storage module interface cannot charge or discharge, and insufficient power output on the power management system does not flow out through the energy storage module interface, nor does surplus power output on the power management system flow to the energy storage module interface. In other words, if a failure occurs in the energy storage module interface, the power management system sets the maximum charge output and maximum discharge output of the energy storage module interface to 0, and then the energy management in the power management system excludes the energy storage module interface and manages energy flow between the three interfaces: the solar power generation module interface, the load module interface, and the power grid module interface. As a result, even if a failure occurs in the energy storage module interface, the other modules of the power management system continue to operate normally and are not affected.

[0042] When the energy storage capacity of the energy storage module interface exceeds a first preset value, it indicates that the energy storage capacity (State of Charge, SOC) has reached a preset height value, and the energy storage device will not continue charging. For this reason, the maximum charge output is set to 0. The first preset value may be 95% of the total capacity of the energy storage device, or 98% of the total capacity of the energy storage device, and the first preset value can be determined by the user and is not specifically limited thereto.

[0043] If the energy storage capacity of the energy storage module interface is less than a second preset value, it indicates that the energy storage device is continuing to discharge, and if the energy storage capacity is less than the second preset value, then the battery discharge will not continue. For this reason, the maximum discharge output is set to 0. The second preset value may be energy storage capacity * (1 - discharge depth), and the discharge depth may be 95% or 98%, and the discharge depth is the ratio between the power currently discharged by the battery pack and the total capacity of the battery pack, and in the means of this application, this ratio is expressed in the form of a percentage. The expression format may be a decimal, and the expression format is not specifically limited here.

[0044] If the energy storage capacity of the energy storage module interface exceeds a first preset value, it indicates that the energy storage module's storage capacity has reached its set maximum value and cannot continue charging, which would otherwise affect the battery's lifespan. Therefore, the power management system can set the maximum charge output of the energy storage module interface to 0, thereby preventing the power management system from charging the energy storage module. Similarly, if the energy storage capacity of the energy storage module interface is less than a second preset value, it indicates that the energy storage module has already or nearly released all of its power and cannot continue discharging, which would otherwise affect the battery's lifespan. Therefore, the power management system can set the maximum discharge output of the energy storage module interface to 0, thereby preventing the energy storage module from discharging to the power management system.

[0045] Referring to Figure 5, in the specific implementation process, Figure 5 is a flowchart for setting the battery charge / discharge output of the energy storage module interface of an energy storage system according to one embodiment of the present invention. As can be seen from Figure 5, after the program entry point enters the setting program, first the battery capacity, battery discharge depth, preset maximum charge output, and preset maximum discharge output of the current energy storage module interface are obtained from the data storage device. First, it is determined whether the relationship between battery capacity and discharge depth satisfies SOC > 1-DOD, and if so, it is further determined whether SOC is less than a preset height value. If SOC is less than a preset height value, it indicates that the energy storage module interface is not fully charged, and at this time, it may be charged or discharged. If SOC is greater than or equal to a preset height value, it indicates that the energy storage module interface is fully charged, and it cannot be charged, i.e., the preset maximum charge output is 0, and only discharge is possible, and the discharge output is limited according to the actual situation, but is not limited here. If SOC ≤ 1-DOD, it indicates that the battery pack has released the power it stored internally, i.e., the maximum discharge output is 0. In this state, only the energy storage module interface can be charged; it cannot be discharged.

[0046] In some other embodiments, if a failure occurs in the photovoltaic module interface, the current actual output of the photovoltaic module interface is set to 0. When a failure occurs in the photovoltaic module interface, it indicates that the photovoltaic module interface cannot transport power to the power management system, and in this case, setting the current actual output corresponding to the photovoltaic module interface to 0 avoids affecting the control logic of other module interfaces. In other words, when a failure occurs in the photovoltaic module interface, the power management system sets the current actual output corresponding to the photovoltaic module interface to 0, and then the energy management in the power management system excludes the photovoltaic module interface and manages the energy flow between the three: the energy storage module interface, the load module interface, and the power grid module interface. This ensures that even if a failure occurs in the photovoltaic module interface, the other modules of the power management system continue to operate normally and are not affected.

[0047] In the embodiment of this application, if one or more module interfaces in the power management system fail, other module interfaces can operate normally, but in related technologies, if any module interface in the power management system fails, the power management system cannot operate. This solves the problem of making the power management of the power management system smarter and improving the user experience.

[0048] Step S120: Based on the magnitude and flow direction of the interface output in the interface output information corresponding to each selectively acquired interface, a target call output in the power management system is determined, the target call output being the output that the power management system requests from the energy storage module interface to supply or absorb energy. In the means of the embodiments of the present application, the operating modes include a self-consumption mode, a peak-cut bottom-fill mode, and an energy storage priority mode.

[0049] It is important to understand that the power management system manages energy across four components: the solar power module interface, the energy storage module interface, the load module interface, and the power grid module interface. The current actual output of the solar power module interface is determined primarily by external factors such as current light intensity and temperature. The current actual output of the energy storage module interface is determined primarily by the current power consumption status of power-consuming devices in the access system. The power grid module interface is determined primarily by the power management system's current operating mode and power information such as the power flow settings of the city power grid. Therefore, it can be seen that the power management system is more passive in its management of the three types of module interfaces: the solar power module interface, the energy storage module interface, and the power grid module interface. The power management system can selectively acquire interface output information from the solar power module interface, the load module interface, and the power grid module interface in different operating modes, and then determine the target call output to be replenished or absorbed based on the selectively acquired interface output information. The power management system can then call the energy storage module interface based on the target call output and supply or absorb energy according to that target call output.

[0050] The following describes in detail the calculation process for the output of target calls in power management systems under different operating modes.

[0051] In the self-consumption mode, the power in the power management system is the power supply energy storage module and the power demand of the load module obtained from the solar power generation module interface. For example, if there is surplus power in the power management system, it is transported to the power grid module interface, and if the power management system calls the energy storage module but does not meet the power usage demand of the load module interface, power can be supplemented from the power grid module interface. Points to understand are that in self-consumption mode, the power grid module does not have a mandatory request to the power management system regarding power flow settings, surplus power generated by solar power generation can be reverse-flowed in self-consumption mode, and if the energy storage module cannot replenish the insufficient amount of power, it will be supplemented from the power grid.

[0052] In self-consumption mode, the power grid module does not have strict requirements for power flow settings in the power management system. Therefore, in this mode, it can acquire only the current actual output of the photovoltaic module interface and the load module interface, and the target call output in the power management system can be determined according to the difference between the current actual output of the photovoltaic module interface and the current actual output of the load module interface. The current actual output of the load module interface is determined according to the load equipment connected to the load module interface and the operating status of the load equipment.

[0053]

number

[0054] In some embodiments, in self-consumption mode, if the calculated target call output P is a positive number, it indicates that the solar power generation is greater than the load power, and the power management system has surplus power output. Therefore, the power management system calls the energy storage module interface to absorb energy according to the target call output, i.e., calls the energy storage module interface to charge. In some other embodiments, if the target call output is greater than the maximum charge output of the energy storage module interface (where the set charge direction is positive), the charge power of the energy storage module interface is set to the maximum charge output, and at this time the energy storage module interface maintains the maximum charge output and draws power from the power management system. If the calculated target call output P is a negative number, it indicates that the solar power generation is less than the load power, and the power management system needs supplemental power. Therefore, the power management system needs to call the energy storage module interface to supply energy according to the target call output, i.e., calls the energy storage module interface to discharge. In some further embodiments, if the target call output is the maximum discharge output of the energy storage module interface (where the set discharge direction is negative), the discharge output of the energy storage module interface is set to the maximum discharge output, and in this case, the energy storage module interface maintains the maximum discharge output and discharges to the power management system.

[0055] Peak-cut bottom-fill mode refers to a scenario where, during peak power usage in the power grid, the power demand connected to the power grid module interface is too high, requiring the power management system to supply energy to the power grid with a large peak-cut bottom-fill power. In this mode, the power generated by the solar power modules in the power management system is not only supplied to energy storage modules and load modules, but also supplied to the power grid at the power flow setting output. When power usage in the power grid is low, the power demand decreases, and the power management system can transport energy to the power grid with a small power flow setting output. Alternatively, if energy is not transported to the power grid, and consequently the energy consumption demand of the loads connected to the load module interface in the power management system is too high, the power grid can transport energy to the power management system at the power flow setting output, thus maintaining a stable and sufficient power supply to the power management system.

[0056] In peak-cut bottom-fill mode, the power management system needs to further supply or supplement power to the power grid modules with the current power grid flow setting output. Therefore, in this mode, the power management system needs to obtain the current actual output of the photovoltaic module interface, the current actual output of the load module interface, and the current power grid flow setting output of the power grid module interface, respectively. The power management system determines the target call output based on the difference between the current actual output of the photovoltaic module interface, the current actual output of the load module interface, and the current power grid flow setting output of the power grid module interface.

[0057]

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[0058] In some embodiments, in peak-cut bottom-fill mode, if the calculated target call output P is a positive number, the solar power generation is greater than the sum of the load power and the current power flow setting output of the power grid module, indicating that there is a surplus power output to the power management system. Therefore, the power management system needs to call the energy storage module interface to absorb energy according to the target call output, i.e., call the energy storage module interface to charge. In some other embodiments, if the target call output is greater than the maximum charge output of the energy storage module interface (with a set charge direction of positive), the charge power of the energy storage module interface is set to the maximum charge output, and the energy storage module interface maintains the maximum charge output and draws power from the power management system. If the calculated target call output P is a negative number, the solar power generation is less than the load power, indicating that the power management system needs to be recharged. Therefore, the power management system needs to call the energy storage module interface to supply energy according to the target call output, i.e., call the energy storage module interface to discharge. In some further embodiments, if the target call output is the maximum discharge output of the energy storage module interface (where the set discharge direction is negative), the discharge output of the energy storage module interface is set to the maximum discharge output, and in this case, the energy storage module interface maintains the maximum discharge output and discharges to the power management system.

[0059] Energy storage priority mode refers to a power management system that prioritizes charging energy storage modules corresponding to the solar power module interface by acquiring power from the solar power module interface and / or the power grid module interface, thereby ensuring that the energy storage modules are as fully charged as possible or reach a preset maximum energy value. It is important to understand that in energy storage priority mode, power grid modules do not have a mandatory request to the power management system regarding power flow settings; surplus solar power can be introduced into the power grid; and any power shortages, if not replenished by the energy storage modules, are supplemented from the power grid.

[0060] In energy storage priority mode, the power grid module does not have strict requirements for power flow settings from the power management system. Therefore, in this mode, only the current actual output of the photovoltaic module interface and the load module interface can be obtained. The power management system then determines the target call output in the power management system based on the difference between the current actual output of the photovoltaic module interface and the current actual output of the load module interface.

[0061]

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[0062] In some embodiments, in energy storage priority mode, if the calculated target call output P is a positive number, it indicates that the solar power generation is greater than the load power and that there is surplus power output in the power management system. Therefore, the power management system needs to call the energy storage module interface and absorb energy according to the target call output, i.e., call the energy storage module interface to charge it, and in energy storage priority mode, it needs to prioritize charging the energy storage module and ensure that the energy storage module's energy is as fully charged as possible or reaches a preset maximum energy value. Therefore, the power management system can always set the charging power of the energy storage module interface to the maximum charging output, and the power of the energy storage module interface can be obtained from both the solar power generation module and the power grid module. If the calculated target call output P is a negative number, it indicates that the solar power generation is less than the load power and that the power management system needs to be powered up. Therefore, the power management system needs to call the energy storage module interface and supply energy according to the target call output, i.e., call the energy storage module interface to discharge it. In some other embodiments, if the target call output is less than the maximum discharge output of the energy storage module interface (where the set discharge direction is negative), the discharge output of the energy storage module interface is set to the maximum discharge output, and the energy storage module interface maintains the maximum discharge output and discharges to the power management system.

[0063] In the self-consumption mode or energy storage priority mode described above, when the power grid reverse current prevention function of the power management system is set to the activated state, the maximum reverse power of the power grid module interface is set to 0. In order to prevent the transport of surplus power from the power management system to the power grid module interface in self-consumption mode or energy storage priority mode, the power grid reverse current prevention function is set to the activated state at this time, and the maximum reverse power of the power grid module interface is correspondingly set to 0, which is advantageous for the circulation of power in the power management system.

[0064] The following describes in detail the PV limiting operation used when the power generation output of the solar power module interface is high.

[0065] During implementation, if the energy supply output of the photovoltaic module interface exceeds the sum of the three allowable outputs of the energy storage module interface, the load module interface, and the power grid module interface in the current operating mode of the power management system, the energy supply output of the photovoltaic module interface is limited to the sum of the allowable outputs. If the sum of the allowable outputs exceeds the maximum energy supply output of the photovoltaic module interface, the energy supply output of the photovoltaic module interface is limited to the maximum energy supply output. In some embodiments, the power generated by the photovoltaic module can be limited by maximum power point tracking (MPPT).

[0066] In different operating modes, the sum of the three allowable outputs of the energy storage module interface, load module interface, and power grid module interface differs. In the self-consumption mode and energy storage priority mode, the sum of the three allowable outputs of the energy storage module interface, load module interface, and power grid module interface is the same, and in both cases, the current actual output P of the load module interface is the same. eps Maximum charge output P of the energy storage module interface chgMa x and the maximum reverse power P of the power grid module interface goutset The sum of the three allowable outputs of the energy storage module interface, load module interface, and power grid module interface in peak cut bottom fill mode is the current actual output P of the load module interface. eps Maximum charge output P of the energy storage module interface chgMax and the current power grid current setting output P gset That is the case.

[0067]

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[0068]

number

[0069] The above power management system avoids damage to the energy storage module interface, load module interface, or power grid module interface due to excessive energy supply output from the solar power module interface by limiting the maximum energy supply output of the solar power module interface to the sum of the allowable outputs of the three interfaces: the energy storage module interface, the load module interface, and the power grid module interface, under different operating modes.

[0070] In some embodiments, the maximum energy supply output P of the photovoltaic module interface determined in the different operating modes PvMax is the maximum photovoltaic power generation power P determined by the photovoltaic module following the maximum power point tracking (MPPT). MPPT If it is greater than PvMax the maximum energy supply output P of the photovoltaic module interface is limited within P MPPT to avoid damage to the photovoltaic module.

[0071] Step S130: Based on the target call output, determine the insufficient power output or the surplus power output of the power management system, and further call the energy storage module interface to perform energy supply corresponding to the insufficient power output or energy absorption corresponding to the surplus power output.

[0072] If the target call output is a negative number, it indicates that the power management system needs to replenish the power output from the energy storage module interface. Therefore, the power management system calls the energy storage module interface to perform discharge energy supply to replenish the insufficient power output of the power management system. If the target call output is a positive number, it indicates that there is a surplus power output in the power management system and it is necessary to perform energy absorption by the energy storage module interface. Therefore, the power management system calls the energy storage module interface to absorb the surplus power output from the power management system.

[0073] In some embodiments, when the absolute value of the under-power output exceeds the absolute value of the maximum discharge output of the energy storage module interface, the absolute value of the energy supply output of the energy storage module interface is set to the absolute value of the preset maximum discharge output. When the absolute value of the surplus power output exceeds the absolute value of the preset maximum charge output of the energy storage module interface, the absolute value of the energy absorption output of the energy storage module interface is set to the absolute value of the preset maximum charge output. This operation effectively protects the energy storage module and avoids damage to the energy storage module due to exceeding its maximum discharge and maximum charge outputs.

[0074] In some embodiments, the operating state of the power management system can be determined based on the current operating mode and target call output of the power management system, which will be described in detail below.

[0075] For the specific implementation process, please refer to Figure 6, which is a diagram illustrating the interaction of energy between multiple module interfaces in an energy storage system in self-consumption mode. As can be seen from Figure 6, the photovoltaic module interface (PV), energy storage module interface (BAT), power grid module interface (Grid), and load module interface (EPS) are all connected by inverter modules, thereby forming an energy storage system. The inverter module is equipped with an inverter, which can convert DC power into constant-frequency constant-voltage or frequency-regulated voltage AC power. In Figure 6, the arrow direction indicates the direction of the main energy source and the main energy output direction of the module. Continuing with Figure 6, in self-consumption mode, the target call output P=P of the power management system in self-consumption mode. pv -P epsThe power management system can be divided into six operating states using this as a criterion value, including battery replenishment charging state, battery power grid replenishment charging state, overload state, battery charging state, battery power grid charging state, and solar power generation restriction state.

[0076] Target call output P ∈ [-P dscMax If the value is 0, the power management system is in a battery replenishment charging state. In this state, the power management system calculates the target call output and finds that the power generated by the solar power module interface is not yet sufficient to meet the power usage output of the load module interface. However, since the difference between the two is within the maximum discharge output of the energy storage module interface, the power management system calls the energy storage module interface to replenish the insufficient power output, thereby meeting the power usage demand of the load module interface.

[0077] Target call output P ∈ [-P ginMax -P dscMax , -P dscMax ) means the power management system is in a battery power grid replenishment charging state. In this state, the power management system calculates the target call output and finds that the sum of the power generated by the solar power module interface and the maximum discharge output of the energy storage module interface does not yet meet the power usage output of the load module interface. However, since the power usage output that the load module interface is lacking is within the maximum power of energy absorbed from the power grid module interface by the power grid, the power management system calls the energy storage module interface and the power grid module interface to supply power simultaneously, thereby meeting the power usage demand of the load module interface.

[0078] Target call output P ∈ (-∞, -P ginMax -P dscMaxIf this is the case, the power management system is in an overloaded state. In this state, the power management system can calculate the target call output and find that the sum of the power generated by the photovoltaic module interface, the maximum discharge output of the energy storage module interface, and the maximum energy absorbed from the power grid by the power grid module interface does not meet the power usage demand of the load module interface. This indicates that the load on the power management system is excessive, and in some embodiments, a trip-off process can be employed to avoid damage to the power management system.

[0079] Target call output P ∈ (0, P chgMax When this is the case, the power management system is in a battery charging state. In this state, the power management system calculates the target call output and finds that the power generated by the solar power module interface exceeds the power usage demand of the load module interface, and that the surplus power output is within the maximum charge output of the energy storage module interface. Therefore, the power management system calls the energy storage module interface to absorb the surplus power output, thereby achieving a balance in the power flow within the power management system.

[0080] Target call output P ∈ (P chgMax , P chgMax +P goutMaxWhen this is the case, the power management system is in a battery power grid charging state. In this state, the power management system calculates the target call output and finds that the power generated by the photovoltaic module interface exceeds the power usage demand of the load module interface, and the surplus power output also exceeds the maximum charge output of the energy storage module interface, but does not exceed the sum of the maximum charge output of the energy storage module interface and the maximum reverse power flow of the power grid module interface. Therefore, the power management system calls the energy storage module interface and the power grid module interface to absorb the surplus power output simultaneously. In some embodiments, the power management system preferentially absorbs the surplus power output with the energy storage module interface at its maximum charge output, and then the remaining power output is released to the power grid by the power grid module interface.

[0081] Target call output P ∈ (P chgMax +P goutMax When the value is , +∞, the power management system is in a photovoltaic power limiting state. In this state, the power management system can calculate the target call output and find that the power generated by the photovoltaic module interface exceeds the power usage demand of the load module interface, and that the surplus power output exceeds the sum of the maximum charge output of the energy storage module interface and the maximum reverse power of the power grid module interface. Therefore, the power management system can impose a PV limit on the photovoltaic module interface, that is, limit the maximum power generation of the photovoltaic module, and in some embodiments, it can impose an MPPT (Maximum Power Point Tracking) limit on the photovoltaic module.

[0082] In some embodiments, before calling an energy storage module interface to discharge and replenish the insufficient power output, the power management system determines whether the discharge depth of the energy storage module interface is lower than a preset value for the minimum power, for example, if the power is less than 5%. If it is lower, the system achieves the objective of preventing the energy storage module interface from discharging by setting the maximum discharge output of the energy storage module interface to 0, indicating that the power of the energy storage module interface has been released to its limit.

[0083] In some embodiments, before calling an energy storage module interface to charge and absorb excess power output, the power management system determines whether the electrical capacity of the energy storage module interface is higher than a preset value for the maximum energy, for example, the energy is higher than 95%. If it is higher, it indicates that the charge of the energy storage module interface has reached its peak limit, and achieves the objective of preventing the energy storage module interface from being charged by setting the maximum charge output of the energy storage module interface to 0.

[0084] Referring to Figure 7, which is a diagram illustrating the interaction of multiple module interface energies in an energy storage system in peak-cut bottom-fill mode. In peak-cut bottom-fill mode, the target call output P=P in the power management system in peak-cut bottom-fill mode. pv -P eps -P gset The power management system can be divided into five operating states using this as a criterion value, including the battery replenishment / charging state during power grid current fluctuations, the battery replenishment / charging state, the battery charging state, the battery charging state during solar power generation restrictions, and the battery charging state during power grid current fluctuations.

[0085] Target call output P ∈ [-P dscMaxIf the value is 0, the power management system is in a battery replenishment charging state. In this state, the power management system calculates the target call output and finds that the power generated by the solar power module interface does not meet the power usage output of the load module interface and the power grid flow setting output in the power grid flow, but the difference between these three values ​​is within the maximum discharge output of the energy storage module interface. Therefore, the power management system calls the energy storage module interface to replenish the insufficient power output, so that the load module interface and the power grid module interface meet the power usage demand during power flow fluctuations.

[0086] Target call output P ∈ (-∞, -P dscMax ) means the power management system is in a battery replenishment charging state during power grid current fluctuations. In this state, the power management system calculates the target call output and finds that the sum of both the power generated by the photovoltaic module interface and the maximum discharge output of the energy storage module interface does not meet the power usage output of the load module interface and the power grid current setting output in the power grid current. This indicates that the reverse current power required by the power grid in the power management system is too high and cannot be handled by the energy storage module interface and the photovoltaic module interface. In some embodiments, the supplied power grid current power is reduced to transport more power to the load module interface and ensure that the loads corresponding to the load module interface operate normally.

[0087] Target call output P ∈ (0, P chgMaxWhen this is the case, the power management system is in a battery charging state. In this state, the power management system calculates the target call output and finds that the power generated by the solar power module interface exceeds the power usage output of the load module interface and the power grid flow setting output in the power grid flow, and that the surplus power output is within the maximum charge output of the energy storage module interface. Therefore, the power management system calls the energy storage module interface to absorb the surplus power output, thereby achieving a balance of power flow in the power management system.

[0088] Target call output P ∈ (P chgMax , P chgMax +P pv In this state, the power management system is in a battery charging state when solar power generation is limited. In this state, the power management system calculates the target call output and finds that the power generated by the solar power module interface exceeds the power usage demand of the load module interface, and the surplus power output also exceeds the maximum charge output of the energy storage module interface, but does not exceed the sum of the maximum charge output of the energy storage module interface and the solar power module interface limit power. Therefore, the power management system can call the energy storage module interface to absorb the surplus power output, as well as limit the actual output power of the solar power module interface. In some embodiments, MPPT (Maximum Power Point Tracking) limiting can be applied to the solar power module.

[0089] Target call output P ∈ (P chgMax +P pvWhen the value is , +∞, the power management system is in a battery charging state during power grid flow fluctuations. In this state, the power management system calculates the target call output and finds that the power transported to the power management system by the power grid module interface during power grid flow fluctuations exceeds the power usage demand of the load module interface, and the surplus power output exceeds the maximum charge output of the energy storage module interface.

[0090] Referring to Figure 8, which is a diagram illustrating the interaction of multiple module interface energies in an energy storage system in energy storage priority mode. In energy storage priority mode, the target call output P=P of the power management system in energy storage priority mode. pv -P eps Using this as a criterion value, the power management system can be divided into three operating states, including overload state, power grid replenishment charging state, and solar power generation limiting battery charging state.

[0091] Target call output P ∈ [P chgMax -P ginMax , P chgMax ) means the power management system is in a power grid replenishment charging state. In this state, the power management system calculates the target call output and finds that the sum of the power generated by the solar power module interface and the maximum discharge output of the energy storage module interface does not meet the power usage output of the load module interface. However, it finds that the power usage output that is lacking for the load module interface is the maximum energy power absorbed by the power grid module interface from the power grid. Therefore, the power management system calls the energy storage module interface and the power grid module interface and supplies power to them simultaneously to meet the power usage demand of the load module interface.

[0092] Target call output P ∈ (-∞, P chgMax -P ginMaxIf this is the case, the power management system is in an overloaded state. In this state, the power management system calculates the target call output and finds that the sum of the power generated by the photovoltaic module interface, the maximum discharge output of the energy storage module interface, and the maximum energy absorbed from the power grid by the power grid module interface is insufficient to meet the power usage demand of the load module interface. This indicates that the load on the power management system is excessive, and in some embodiments, a trip-off process is employed to avoid damage to the power management system.

[0093] Target call output P ∈ (P chgMax When the value is , +∞, the power management system is in a battery charging state when solar power generation is limited. In this state, the power management system calculates the target call output and finds that the power generated by the solar power module interface exceeds the power usage demand of the load module interface, and that the surplus power output exceeds the maximum charge output of the energy storage module interface. Therefore, the solar power module interface is first limited, and the power generated by the solar power module interface is limited to within the maximum charge output of the load module interface and the battery module interface. The power management system calls the energy storage module interface to absorb the surplus power output, thereby achieving a balance of power flow in the power management system. In some embodiments, MPPT (Maximum Power Point Tracking) limiting can be applied to the solar power module.

[0094] In some other embodiments, the current operating mode and target call output of the power management system can also be inversely estimated based on the operating state of the power management system. If a certain operating state indicates a fault, fault positioning can be performed quickly, saving fault positioning time and solving the problem of difficulty in fault positioning using integrated control logic.

[0095] The means according to this invention determines interface output information corresponding to multiple module interfaces in the power management system according to different operating modes, determines the target call output in the power management system according to the interface output information, and finally determines whether to acquire insufficient power from the energy storage module interface or transport surplus power to the energy storage module interface according to the target call output, and determines the control logic of the power management system according to different operating modes. This avoids the adverse effects of integrated control logic, and the control logic of the operating modes and module interfaces are independent of each other, improving the scalability of the power management system without affecting the conventional control logic as the number of operating modes or module interfaces increases.

[0096] Referring to Figure 9, a structural block diagram of a power adjustment device 300 according to an embodiment of the present application. The power adjustment device 300 is applied to an electronic device 100 and comprises an interface output information acquisition module 310, a target call output determination module 320, and an adjustment module 330. The interface output information acquisition module 310 is used to selectively acquire interface output information corresponding to the photovoltaic module interface, the load module interface, and the power grid module interface, respectively, depending on the current operating mode of the power management system, and the interface output information includes the magnitude and flow direction of the interface output. The target call output determination module 320 is used to determine a target call output in the power management system based on the magnitude and flow direction of the interface output in the interface output information corresponding to each selectively acquired interface, and the target call output is an output that provides energy supply or energy absorption as requested by the power management system to the energy storage module interface. The adjustment module 330 is used to determine the under-power output or surplus power output of the power management system based on the target call output, and to further call the energy storage module interface to supply energy according to the under-power output or absorb energy according to the surplus power output.

[0097] In some embodiments of the present application, the power adjustment device 300 further comprises: an energy supply output determination module for the energy storage module interface for setting the absolute value of the energy supply output of the energy storage module interface to the absolute value of the preset maximum discharge output when the absolute value of the insufficient power output exceeds the absolute value of the preset maximum discharge output of the energy storage module interface; and an energy absorption output determination module for the energy storage module interface for setting the absolute value of the energy absorption output of the energy storage module interface to the absolute value of the preset maximum charge output when the absolute value of the surplus power output exceeds the absolute value of the preset maximum charge output of the energy storage module interface.

[0098] In some embodiments of the present invention, the power adjustment device 300 further includes: a power setting module for the energy storage module interface that sets the maximum charge output and maximum discharge output of the energy storage module interface to 0 when a failure occurs in the energy storage module interface; a power setting module for setting the maximum charge output of the energy storage module interface to 0 when the energy storage capacity of the energy storage module interface exceeds a first preset value when the energy storage capacity of the energy storage module interface exceeds a first preset value; and a power setting module for setting the maximum discharge output of the energy storage module interface to 0 when the energy storage capacity of the energy storage module interface is lower than a second preset value when the energy storage capacity of the energy storage module interface is lower than a second preset value.

[0099] In some embodiments of the present application, the operating modes include a self-consumption mode, a peak-cut bottom-fill mode, and an energy storage priority mode.

[0100] In some embodiments of the present invention, the interface output information acquisition module 310 includes a data acquisition module in self-consumption mode for acquiring the current actual output of the photovoltaic module interface and the current actual output of the load module interface, respectively, in the self-consumption mode, and the target call output determination module 320 includes a target call output determination module in self-consumption mode for determining the target call output in the power management system based on the difference between the current actual output of the photovoltaic module interface and the current actual output of the load module interface.

[0101] In some embodiments of the present invention, the interface output information acquisition module 310 includes a peak-cut bottom-fill mode data acquisition module for acquiring the current actual output of the photovoltaic module interface, the current actual output of the load module interface, and the current power grid power flow setting output of the power grid module interface, respectively, in the peak-cut bottom-fill mode, and the target call output determination module 320 includes a peak-cut bottom-fill mode target call output determination module for determining the target call output in the power management system based on the difference between the current actual output of the photovoltaic module interface, the current actual output of the load module interface, and the current power grid power flow setting output of the power grid module interface.

[0102] In some embodiments, the interface output information acquisition module 310 includes an energy storage priority mode data acquisition module for acquiring the current actual outputs of the photovoltaic module interface and the load module interface, respectively, in the energy storage priority mode, and the target call output determination module 320 includes an energy storage priority mode target call output determination module for determining the target call output in the power management system based on the difference between the current actual output of the photovoltaic module interface and the current actual output of the load module interface.

[0103] In some embodiments, the power adjustment device 300 further includes a first photovoltaic module interface energy supply output limiting module for limiting the energy supply output of the photovoltaic module interface to the sum of the three allowable outputs of the energy storage module interface, the load module interface and the power grid module interface when the energy supply output of the photovoltaic module interface exceeds the sum of the three allowable outputs of the energy storage module interface, the load module interface and the power grid module interface in the current operating mode of the power management system; and a second photovoltaic module interface energy supply output limiting module for limiting the energy supply output of the photovoltaic module interface to the maximum energy supply output when the sum of the allowable outputs exceeds the maximum energy supply output of the photovoltaic module interface.

[0104] In some embodiments, the energy supply output limiting module for a first photovoltaic module interface includes an energy supply output limiting module for a photovoltaic module interface in self-consumption mode for limiting the energy supply output of the photovoltaic module interface to the sum of three if the energy supply output of the photovoltaic module interface exceeds the sum of three: the maximum charge output of the energy storage module interface, the current actual output of the load module interface, and the maximum reverse power flow of the power grid module interface.

[0105] In some embodiments, the first photovoltaic module interface energy supply output limiting module further comprises a peak-cut bottom-fill mode photovoltaic module interface energy supply output limiting module to the sum of three if the energy supply output of the photovoltaic module interface exceeds the sum of three: the maximum charge output of the energy storage module interface, the current actual output of the load module interface, and the current power grid flow setting output of the power grid module interface.

[0106] In some embodiments, the first photovoltaic module interface energy supply output limiting module further comprises an energy storage priority mode energy supply output limiting module for photovoltaic module interfaces to the sum of three if the energy supply output of the photovoltaic module interface exceeds the sum of three: the maximum charge output of the energy storage module interface, the current actual output of the load module interface, and the maximum reverse power flow of the power grid module interface.

[0107] In some embodiments, the power regulator 300 further comprises a power grid reverse current prevention module for setting the maximum reverse power of the power grid module interface to 0 when the power grid reverse current prevention function of the power management system is set to activated in the self-consumption mode or the energy storage priority mode.

[0108] In some embodiments, the power regulator 300 further comprises an operating state determination module for determining the operating state of the power management system based on the current operating mode of the power management system and the target call output.

[0109] Those skilled in the art can, for the convenience and brevity of explanation, refer to the corresponding processes in the previously described embodiment of the method for the specific operation of the above-described apparatus and module, and will not be described again here.

[0110] In some embodiments of the present invention, the coupling of modules may be electrical, mechanical, or of other forms.

[0111] Furthermore, each functional module in each embodiment of the present application may be integrated into a single processing module, each module may exist physically independently, or two or more modules may be integrated into a single module. The integrated module may be implemented in hardware form or in the form of a software functional module.

[0112] Referring to Figure 10, this is a structural block diagram of an electronic device according to an embodiment of the present application. The electronic device 100 may be a switch, a computer, or a control unit having data transmission. The electronic device 100 in the present application may include a processor 110, a memory 120, and one or more of one or more application programs, one or more of which are stored in the memory 120 and configured to be executed by one or more processors 110, and one or more of which are configured to perform the method described in the method embodiment described above.

[0113] The processor 110 may include one or more processing cores. The processor 110 connects various internal parts of the entire electronic device 100 using various interfaces and lines, and executes various functions and processing data of the electronic device 100 by operating or executing instructions, programs, code sets or instruction sets stored in memory 120, and by retrieving data stored in memory 120. Selectively, the processor 110 can be implemented in at least one hardware form from Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The processor 110 can integrate one or more combinations of a Central Processing Unit (CPU), Graphics Processing Unit (GPU), modem, etc. Here, the CPU mainly processes the operating system, user interface, and application programs, the GPU is responsible for rendering and drawing the display content, and the modem is responsible for wireless communication processing. To make it easier to understand, the above modem does not need to be integrated into the processor 110, but can be implemented using a separate communication chip.

[0114] Memory 120 may include Random Access Memory (RAM) and Read-Only Memory. Memory 120 can be used to store instructions, programs, code, code sets, or instruction sets. Memory 120 may include a program storage area and a data storage area. The program storage area can store instructions for implementing an operating system, instructions for implementing at least one function (e.g., touch function, audio playback function, image display function, etc.), and instructions for implementing each of the following method embodiments. The data storage area can also store data created while the electronic device 100 is in use (e.g., phone book, audio / video data, chat history data, etc.).

[0115] Referring to Figure 11, this is a structural block diagram of a computer-readable storage medium according to an embodiment of the present application. Program code is stored in the computer-readable storage medium 200, and the program code is called by a processor to execute the method described in the above embodiment.

[0116] The computer-readable storage medium 200 may be electronic memory such as flash memory, EEPROM (electrically erasable programmable read-only memory), EPROM, hard disk, or ROM. Optionally, the computer-readable storage medium 200 may include a non-transitory computer-readable storage medium. The computer-readable storage medium 200 has a storage area for storing program code 210 that performs any of the method steps in the above method. This program code is read from or written to one or more computer program products. The program code 210 may be compressed, for example, in an appropriate format.

[0117] Finally, it should be noted that the above embodiments are not limitations, but merely illustrate the technical means of the present application. While the present application has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical means described in the above embodiments or substitute some of the technical features therein, and such modifications or substitutions will not cause the essence of the corresponding technical means to deviate from the spirit and scope of the technical means of the embodiments of the present application. Cross-reference to related applications

[0118] This application claims priority and interest in the patent application no. 202311010122.4, submitted to the China National Intellectual Property Administration on August 10, 2023, and the entire contents of the patent application no. 202311010122.4 are incorporated herein by reference.

Claims

1. A power adjustment method, applied to a power management system, the power management system is used to manage power output between a photovoltaic module interface, an energy storage module interface, a load module interface and a power grid module interface, the photovoltaic module interface is an interface connecting a photovoltaic module to the power management system, the energy storage module interface is an interface connecting an energy storage module to the power management system, the load module interface is an interface connecting a load module to the power management system, the power grid module interface is an interface connecting a power grid module to the power management system, and the power adjustment method is, A step of selectively acquiring interface output information corresponding to the photovoltaic module interface, the load module interface, and the power grid module interface, respectively, according to the current operating mode of the power management system, wherein the interface output information includes the magnitude of the interface output and the flow direction of the interface output. A step of determining a target call output in the power management system based on the magnitude and flow direction of the interface output in the interface output information corresponding to each selectively acquired interface, wherein the target call output is an output that provides energy supply or energy absorption as requested by the power management system to the energy storage module interface; The steps include determining the insufficient or surplus power output of the power management system based on the target call output, and further calling the energy storage module interface to supply energy according to the insufficient power output or absorb energy according to the surplus power output, The aforementioned operating modes include self-consumption mode, peak-cut bottom-fill mode, and energy storage priority mode. The self-consumption mode refers to the power in the power management system being power obtained from the solar power generation module interface, and that power being supplied to the power demands of the energy storage module and the load module. The aforementioned peak-cut bottom-fill mode refers to a situation where, during peak power usage of the power grid, the power demand of the power grid connected to the power grid module interface is too high, requiring the power management system to supply energy to the power grid with a large peak-cut bottom-fill power. The aforementioned energy storage priority mode refers to the power management system acquiring power from the solar power generation module interface and / or the power grid module interface to preferentially charge the energy storage module corresponding to the energy storage module interface. Depending on the current operating mode of the power management system, the step of selectively acquiring interface output information corresponding to the solar power generation module interface, the load module interface, and the power grid module interface is: The self-consumption mode includes the step of obtaining the current actual output of the solar power generation module interface and the load module interface, respectively. The step of determining a target call output in the power management system based on the magnitude of the interface output and the flow direction of the interface output in the interface output information corresponding to each selectively acquired interface is: The step includes determining the target call output in the power management system based on the difference between the current actual output of the solar power generation module interface and the current actual output of the load module interface, In the self-consumption mode, if the target call output is a positive number, the power management system calls the energy storage module interface to charge it, and if the target call output is greater than the maximum charge output of the energy storage module interface, it sets the charging power of the energy storage module interface to the maximum charge output. Depending on the current operating mode of the power management system, the step of selectively acquiring interface output information corresponding to the solar power generation module interface, the load module interface, and the power grid module interface is: The peak cut bottom fill mode includes the steps of obtaining the current actual output of the photovoltaic module interface, the current actual output of the load module interface, and the current power grid power flow setting output of the power grid module interface, respectively. The step of determining a target call output in the power management system based on the magnitude of the interface output and the flow direction of the interface output in the interface output information corresponding to each selectively acquired interface is: The step includes determining the target call output in the power management system based on the difference between the current actual output of the solar power module interface, the current actual output of the load module interface, and the current power grid power flow setting output of the power grid module interface. Depending on the current operating mode of the power management system, the step of selectively acquiring interface output information corresponding to the solar power generation module interface, the load module interface, and the power grid module interface is: The energy storage priority mode includes the step of obtaining the current actual output of the photovoltaic module interface and the current actual output of the load module interface, respectively. The step of determining a target call output in the power management system based on the magnitude of the interface output and the flow direction of the interface output in the interface output information corresponding to each selectively acquired interface is: The step includes determining the target call output in the power management system based on the difference between the current actual output of the solar power generation module interface and the current actual output of the load module interface, A power adjustment method comprising: in the energy storage priority mode, when the target call output is a positive number, the power management system calls the energy storage module interface to charge it, and the power management system always sets the charging power of the energy storage module interface to the maximum charge output.

2. The aforementioned power adjustment method is If the absolute value of the insufficient power output exceeds the absolute value of the maximum discharge output of the energy storage module interface, the step is to set the absolute value of the energy supply output of the energy storage module interface to the absolute value of the maximum discharge output. The power adjustment method according to claim 1, further comprising the step of setting the absolute value of the energy absorption output of the energy storage module interface to the absolute value of the maximum charge output when the absolute value of the surplus power output exceeds the absolute value of the maximum charge output of the energy storage module interface.

3. The aforementioned power adjustment method is If a failure occurs in the energy storage module interface, the steps include setting the maximum charge output and maximum discharge output of the energy storage module interface to 0. When the energy storage capacity of the energy storage module interface exceeds a first preset value, the step of setting the maximum charge output of the energy storage module interface to 0, The power adjustment method according to claim 1, comprising the step of setting the maximum discharge output of the energy storage module interface to 0 if the energy storage capacity of the energy storage module interface is lower than a second preset value.

4. The power adjustment method is: If the energy supply output of the solar power generation module interface exceeds the sum of the allowable outputs of the three interfaces—the energy storage module interface, the load module interface, and the power grid module interface—in the current operating mode of the power management system, the energy supply output of the solar power generation module interface is limited to the sum of the allowable outputs, and The power adjustment method according to claim 1, further comprising the step of limiting the energy supply output of the photovoltaic module interface to the maximum energy supply output if the sum of the allowable outputs exceeds the maximum energy supply output of the photovoltaic module interface.

5. If the energy supply output of the photovoltaic module interface exceeds the sum of the three allowable outputs of the energy storage module interface, the load module interface and the power grid module interface in the current operating mode of the power management system, the step of limiting the energy supply output of the photovoltaic module interface to the sum of the allowable outputs is: The power adjustment method according to claim 4, further comprising the step of limiting the energy supply output of the photovoltaic module interface to the sum of the three: the maximum charge output of the energy storage module interface, the current actual output of the load module interface, and the maximum reverse power flow of the power grid module interface, in the self-consumption mode.

6. If the energy supply output of the photovoltaic module interface exceeds the sum of the three allowable outputs of the energy storage module interface, the load module interface and the power grid module interface in the current operating mode of the power management system, the step of limiting the energy supply output of the photovoltaic module interface to the sum of the allowable outputs is: The power adjustment method according to claim 4, further comprising the step of limiting the energy supply output of the photovoltaic module interface to the sum of the three: the maximum charge output of the energy storage module interface, the current actual output of the load module interface, and the current power grid flow setting output of the power grid module interface, in the peak cut bottom fill mode.

7. If the energy supply output of the photovoltaic module interface exceeds the sum of the three allowable outputs of the energy storage module interface, the load module interface and the power grid module interface in the current operating mode of the power management system, the step of limiting the energy supply output of the photovoltaic module interface to the sum of the allowable outputs is: The power adjustment method according to claim 4, further comprising the step of limiting the energy supply output of the photovoltaic module interface to the sum of the three: the maximum charge output of the energy storage module interface, the current actual output of the load module interface, and the maximum reverse power flow of the power grid module interface, in the energy storage priority mode.

8. The power adjustment method is: The power adjustment method according to claim 1, further comprising the step of setting the maximum reverse power of the power grid module interface to 0 when the power grid reverse current prevention function of the power management system is set to activated in the self-consumption mode or the energy storage priority mode.

9. The power adjustment method according to claim 1, further comprising the step of determining the operating state of the power management system based on the current operating mode of the power management system and the target call output.

10. Electronic device, One or more processors, Memory and It comprises one or more application programs, The one or more application programs are stored in the memory and configured to be executed by the one or more processors, and are configured to perform the power adjustment method described in claim 1, in an electronic device.

11. A computer-readable storage medium wherein program code is stored in the computer-readable storage medium, and the program code is called by a processor to execute the power adjustment method described in Claim 1.

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