Power regulation method, device, 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] The present application relates to the field of home energy storage technology, and more particularly to power conditioning methods, devices, electronic devices and storage media. [Background technology]

[0002] The increasingly severe global energy crisis has encouraged the development of the home energy storage market. With the decline in battery costs, the economic viability of home energy storage devices has become more prominent, leading to a growing trend among residents to install energy storage systems. The energy management system in an energy storage system is the core of the entire home energy storage system, and controls the direction and magnitude of energy flow under different operating conditions, thereby rationally scheduling local energy and ensuring the availability and economic viability of the home energy storage device. However, in conventional energy management systems, the operating states and energy flow management of various devices accessed by the energy management system are integrated to form an integrated control logic, and the complexity of this control logic becomes extremely complex as the number of devices accessed by the energy management system and the energy regulation modes increase, making it difficult to maintain and manage. Summary of the Invention [Problem to be solved by the invention]

[0003] In view of the above problems, the present application proposes a power adjustment method, device, electronic device, and storage medium. [Means for solving the problem]

[0004] In a first aspect, an embodiment of the present application provides a power adjustment method, which is applied to a power management system, and the power management system is used to perform power output management for power between a photovoltaic power generation module interface, an energy storage module interface, a load module interface, and a power grid module interface. The method includes: selectively acquiring interface output information corresponding to each of the photovoltaic power generation module interface, the load module interface, and the power grid module interface according to a current operation mode of the power management system, where the interface output information includes an interface output magnitude and an interface output flow direction; determining a target call output of the power management system based on the interface output magnitude and interface output flow direction in the selectively acquired interface output information corresponding to each interface, where the target call output is an output at which the power management system requests the energy storage module interface to supply or absorb energy; and determining a power output deficit or power output surplus 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 output deficit or absorb energy according to the power output surplus.

[0005] In one alternative embodiment, the method further includes the steps of: when the absolute value of the deficit power output exceeds the absolute value of a preset maximum discharge output of the energy storage module interface, setting the absolute value of the energy supply output of the energy storage module interface as the absolute value of the preset maximum discharge output; and when the absolute value of the surplus power output exceeds the absolute value of a preset maximum charge output of the energy storage module interface, setting the absolute value of the energy absorption output of the energy storage module interface as the absolute value of the preset maximum charge output.

[0006] In an alternative embodiment, the method further includes the steps of: setting a maximum charging output and a maximum discharging output of the energy storage module interface to 0 when a fault occurs in the energy storage module interface; setting a maximum charging output of the energy storage module interface to 0 when an energy storage capacity of the energy storage module interface exceeds a first preset value; and setting a maximum discharging output of the energy storage module interface to 0 when an energy storage capacity of the energy storage module interface is lower than a second preset value.

[0007] In one alternative embodiment, the operating modes include a self-powered / self-extinguishing mode, a peak cut bottom fill mode, and an energy storage priority mode.

[0008] In one alternative embodiment, the step of selectively obtaining interface output information corresponding to each of the photovoltaic power generation module interface, the load module interface, and the power grid module interface according to the current operation mode of the power management system includes a step of respectively obtaining current actual outputs of the photovoltaic power generation module interface and the load module interface in the self-powered / self-extinguishing mode, and correspondingly, the 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 obtained interface includes a step of determining the target call output in the power management system based on a difference between the current actual output of the photovoltaic power generation module interface and the current actual output of the load module interface.

[0009] In one alternative embodiment, the step of selectively obtaining interface output information corresponding to each of the photovoltaic power generation module interface, the load module interface, and the power grid module interface according to a current operation mode of the power management system includes the step of respectively obtaining, in the peak cut bottom fill mode, a current actual output of the photovoltaic power generation module interface, a current actual output of the load module interface, and a current power grid flow set output of the power grid module interface; and correspondingly, the 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 selectively obtained interface output information corresponding to each interface includes the step of determining the target call output in the power management system based on a difference between the current actual output of the photovoltaic power generation module interface, the current actual output of the load module interface, and the current power grid flow set output of the power grid module interface.

[0010] In one alternative embodiment, the step of selectively obtaining interface output information corresponding to each of the photovoltaic power generation module interface, the load module interface, and the power grid module interface according to a current operating mode of the power management system includes a step of respectively obtaining a current actual output of the photovoltaic power generation module interface and a current actual output of the load module interface in the energy storage priority mode, and correspondingly, 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 obtained interface includes a step of determining the target call output in the power management system based on a difference between the current actual output of the photovoltaic power generation module interface and the current actual output of the load module interface.

[0011] In one alternative embodiment, the method further includes the steps of: when the energy supply output of the photovoltaic power generation module interface exceeds a sum of three allowed outputs of the energy storage module interface, the load module interface, and the power grid module interface in a current operating mode of the power management system, limiting the energy supply output of the photovoltaic power generation module interface to the sum of the allowed outputs; and when the sum of the allowed outputs exceeds a maximum energy supply output of the photovoltaic power generation module interface, limiting the energy supply output of the photovoltaic power generation module interface to the maximum energy supply output.

[0012] In one alternative embodiment, when the energy supply output of the photovoltaic power generation module interface exceeds the sum of three allowed outputs of the energy storage module interface, the load module interface, and the power grid module interface in a current operating mode of the power management system, limiting the energy supply output of the photovoltaic power generation module interface to the sum of the allowed outputs includes, when the energy supply output of the photovoltaic power generation module interface exceeds the sum of three values: the maximum charging output of the energy storage module interface, the current actual output of the load module interface, and the maximum reverse flow power of the power grid module interface in the self-powering and self-extinguishing mode, limiting the energy supply output of the photovoltaic power generation module interface to the sum of the three values.

[0013] In one alternative embodiment, when the energy supply output of the photovoltaic power generation module interface exceeds the sum of three allowed outputs of the energy storage module interface, the load module interface, and the power grid module interface in a current operating mode of the power management system, limiting the energy supply output of the photovoltaic power generation module interface to the sum of the allowed outputs comprises, when the energy supply output of the photovoltaic power generation module interface exceeds the sum of three values: the maximum charging 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, limiting the energy supply output of the photovoltaic power generation module interface to the sum of the three values.

[0014] In one alternative embodiment, when the energy supply output of the photovoltaic power generation module interface exceeds the sum of three allowed outputs of the energy storage module interface, the load module interface, and the power grid module interface in a current operating mode of the power management system, limiting the energy supply output of the photovoltaic power generation module interface to the sum of the allowed outputs includes, when the energy supply output of the photovoltaic power generation module interface exceeds the sum of three values: the maximum charging output of the energy storage module interface, the current actual output of the load module interface, and the maximum reverse flow power of the power grid module interface in the energy storage priority mode, limiting the energy supply output of the photovoltaic power generation module interface to the sum of the three values.

[0015] In one alternative embodiment, the method further includes setting a maximum reverse flow power of the power grid module interface to 0 when a power grid backflow prevention function of the power management system is set to an activated state in the autonomous self-extinguishing mode or the energy storage priority mode.

[0016] In one alternative embodiment, the method further includes determining an operational state of the power management system based on a current operating mode of the power management system and the target call output.

[0017] A second aspect, an embodiment of the present application, provides a power adjustment device, the device comprising: an interface output information acquisition module for selectively acquiring interface output information corresponding to each of the photovoltaic power generation module interface, the load module interface, and the power grid module interface according to a current operation mode of the power management system, the interface output information including a magnitude of the interface output and a flow direction of the interface output; a target call output determination module for 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 selectively acquired interface output information corresponding to each interface, the target call output being an output for energy supply or energy absorption that the power management system requests from the energy storage module interface; and an adjustment module for determining a deficit power output 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 deficit power output or absorb energy according to the surplus power output.

[0018] In a third aspect, an embodiment of the present application provides an electronic device comprising one or more processors, a memory, and one or more application programs stored in the memory and configured to be executed by the one or more processors, the application programs being configured to perform the power adjustment method according to the first aspect above.

[0019] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein program code is stored in the computer-readable storage medium, and the program code can be called by a processor to execute the power adjustment method according to the first aspect. [Effects of the Invention]

[0020] The means of the present application determines interface output information corresponding to multiple module interfaces in the power management system according to different operating modes, determines a target call output in the power management system according to the interface output information, and finally determines whether to obtain deficit power from the energy storage module interface or transfer 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 operating modes, the adverse effects of integrated control logic can be avoided, and the control logic of the operating modes and module interfaces are independent from each other. As the operating modes or module interfaces increase, the existing control logic will not be affected, and the scalability of the power management system can be improved. [Brief explanation of the drawings]

[0021] In order to more clearly describe the technical solutions of the embodiments of the present application, the following will briefly describe the drawings that need to be used in the embodiments. It is obvious that the drawings described below are only some embodiments of the present application, and those skilled in the art can further obtain other drawings based on these drawings without any creative work. [Figure 1] FIG. 1 is a block diagram illustrating devices in an energy storage system. [Figure 2] FIG. 1 is a block diagram illustrating devices in a simplified energy storage system. [Figure 3] 1 is a flowchart of grid connection behavior in a self-powered / self-extinguishing mode with a conventional integrated control logic. [Figure 4] 1 is a flow chart diagram illustrating a power adjustment method according to an embodiment of the present application; [Figure 5] 1 is a flowchart illustrating the setting of a battery charge / discharge output of an energy storage module interface of an energy storage system according to an embodiment of the present application. [Figure 6] FIG. 1 is an energy interaction diagram illustrating multiple module interfaces in an energy storage system in a self-extinguishing mode. [Figure 7] FIG. 1 is an energy interaction diagram showing multiple module interfaces in an energy storage system in peak shaving bottom fill mode. [Figure 8] FIG. 1 is an energy interaction diagram illustrating multiple module interfaces in an energy storage system in an energy storage first mode. [Figure 9] 1 is a structural block diagram showing a power adjustment device according to an embodiment of the present application; [Figure 10] 1 is a structural block diagram illustrating an electronic device for performing a power adjustment method according to an embodiment of the present application; [Figure 11] 1 illustrates a storage medium that stores or carries program code for implementing a power adjustment method according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0022] In order to help those skilled in the art understand the present invention better, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0023] Refer to Figure 1, which is a block diagram of the components in an energy storage system. The energy storage system mainly consists of a battery pack with a battery management system (BMS), a power conversion system (PCS), photovoltaic panels (solar panels), a monitoring front-end, and a monitoring back-end. The PCS consists of a PV controller (solar charge controller), an AC / DC bidirectional converter (AC / DC bidirectional converter), and a DC / DC bidirectional converter (DC bidirectional converter). The PV controller transfers energy from the photovoltaic panels to the PCS, the AC / DC bidirectional converter completes the energy exchange between the PCS and the power grid, and the DC / DC bidirectional converter completes the energy exchange between the PCS and the battery pack. As an energy source, the photovoltaic panels constantly release energy into the system, but the energy intensity is affected by the light intensity, making it impossible to guarantee constant energy stability. When using the home energy storage system, household loads may be household appliances such as refrigerators and washing machines connected to an AC line. The energy is mainly obtained from the battery pack, the photovoltaic panels, or the power grid. The battery pack serves as a stable energy supply for the system and can both release and absorb energy. It is the center of energy regulation, and adjusting the battery pack energy output is used to ensure the stability of the system. The power grid is the backup energy for the entire system, and when the system energy is insufficient, energy can be absorbed from the power grid to ensure the stability of the energy storage system. The monitoring front end is mainly used to monitor the energy flow and energy exchange in the energy storage system. The monitoring back end is mainly used to monitor energy data in the energy storage system. The roles of the monitoring front end and the monitoring back end are not specifically limited here.

[0024]

number

[0025] 3, which is a flowchart of the grid connection behavior in the self-powered self-extinguishing mode. The control method shown in FIG. 3 is a control method of a typical energy management system, which will be described 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 PV module interface is normal in the grid-connected mode with the power grid connected. If the PV module interface is normally connected, the PV controller can be started to limit the power input by the PV module interface, and the ACDC converter can be started to realize the conversion between AC and DC in the energy storage system.

[0027] When the photovoltaic power generation is greater than the load power, the energy storage system determines whether the battery pack at the energy storage module interface is fully charged. When the battery pack is fully charged, the DCDC bidirectional converter enters standby mode and does not participate in operation. Furthermore, the ACDC bidirectional converter converts surplus power generated at the photovoltaic module interface into AC current before transmitting it to the power grid module interface. When the battery pack is not fully charged, the DCDC bidirectional converter begins converting DC current generated at the photovoltaic module interface into DC current acceptable for the battery pack, i.e., charging the battery pack. When the photovoltaic power generation is greater than the sum of the load power and the charging power, the surplus power is transmitted to the power grid module interface. When the photovoltaic power generation is less than the sum of the load power and the charging power, no further processing is performed.

[0028] When the photovoltaic power generation is less than the load power, the battery pack of the energy storage module interface determines whether it is in a power shortage state. If so, the power grid interface provides the missing photovoltaic power to the load module interface, and the DCDC bidirectional converter is on standby, preventing the battery pack from discharging. If not, the DCDC bidirectional converter is activated, allowing the battery pack to discharge and supplement the missing photovoltaic power. At this time, it determines whether the energy storage module interface output meets the load power. If not, the power grid module interface supplements the missing power, thereby maintaining the operation of the load module interface. If so, the photovoltaic module interface and the energy storage module interface continue to supply power to the load module interface.

[0029] When the photovoltaic module interface receives an abnormality signal and starts the ACDC controller, it determines whether the battery pack is low on power. If so, the power grid module interface supplies power to the load module interface, and the DCDC bidirectional converter is in standby mode. If the battery pack is not low on power, it starts the DCDC bidirectional converter and discharges the battery pack, thereby supplying energy to the load module interface. At this time, it determines whether the power of the energy storage module interface meets the load power. If not, the power grid module interface provides the remaining power, thereby maintaining the operation of the load module interface. If so, 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 used in conventional energy management systems with grid-connected behavior in self-powered / self-extinguishing mode. As can be seen from the above detailed analysis, this means combines the power control management of each module between the photovoltaic power generation module, battery module, load module and power grid module and the operating status management of each module to form an integrated control logic. This control logic is very complex and difficult to debug. Furthermore, the above means is only a grid-connected mode in self-powered / self-extinguishing mode, and does not take into account the control logic of peak cut / bottom fill mode and energy storage priority mode. If the integrated control logic is supplemented with control logic for different modes, the complexity of the integrated control logic will increase exponentially, which is very disadvantageous for later management and maintenance. Moreover, 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 will be poor overall.

[0031] In response to the technical problems proposed in the background art and the above-mentioned problems, the present invention proposes a power regulation method, device, electronic device, and storage medium, which determine interface output information corresponding to multiple module interfaces in a power management system according to different operating modes, determine a target call output in the power management system according to the interface output information, and finally determine whether to obtain deficit power from the energy storage module interface or transfer 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 operating modes, the adverse effects of integrated control logic are avoided, and the control logic of the operating modes and module interfaces are independent of each other. As the operating modes or module interfaces increase, the conventional control logic is not affected and the scalability of the power management system is improved.

[0032] 4, which is a flow chart illustrating a power regulating method according to an embodiment of the present disclosure. In a specific embodiment, the power regulating method is used in a power regulating device 300 and an electronic device 100 in which the power regulating device 300 is installed, as shown in FIG.

[0033] The procedure shown in FIG. 4 will be described in detail below. The power adjusting method specifically includes the following steps:

[0034] Step S110: Selectively obtain interface output information corresponding to each of the photovoltaic power generation module interface, the load module interface, and the power grid module interface according to a current operation mode of the power management system, where 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 the output of power between the photovoltaic power generation module interface, the energy storage module interface, the load module interface, and the power grid module interface.

[0036] The photovoltaic power generation module interface refers to an interface through which the photovoltaic power generation module accesses the power management system. The current actual output of the photovoltaic power generation module can be obtained by obtaining interface output information at the photovoltaic power generation module interface, including the magnitude and flow direction of the interface output of the photovoltaic power generation module interface. In some embodiments, the flow direction of the interface output of the photovoltaic power generation module interface can be represented by the positive or negative sign of the current actual output of the photovoltaic power generation module. When the obtained current actual output of the photovoltaic power generation module interface is a positive number, the flow direction of the interface output of the photovoltaic power generation module interface is from the photovoltaic power generation module to the power management system. Because the photovoltaic power generation module is a power generation device, the current actual output of the photovoltaic power generation module interface cannot be a negative number under normal conditions. Therefore, when the obtained current actual output of the photovoltaic power generation module interface is a negative number, it indicates that the photovoltaic power generation module is abnormal.

[0037] The 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 be a storage battery, such as a lithium battery or a sodium battery. Obtaining interface output information at the energy storage module interface can obtain a current actual output of the energy storage module interface, including the magnitude and flow direction of the interface output of the energy storage module interface. 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 value of the obtained current actual output of the energy storage module interface indicates that the energy storage module is in a charging state, and the flow direction of the interface output of the energy storage module interface is from the power management system to the energy storage module. A negative value of the obtained current actual output of the energy storage module interface indicates that the energy storage module is in a discharging state, and the flow direction of the interface output of the energy storage module interface is from the energy storage module to the power management system.

[0038] A load module interface refers to an interface through which a load module accesses a power management system, and a load module is a collective term for one or more load devices that operate on power accessed by the power management system. Acquiring interface output information at a load module interface can acquire the current actual output of the load module interface, including the magnitude and flow direction of the interface output of the load module interface. In some embodiments, the flow direction of the interface output of the load module interface can be expressed by the positive or negative sign of the current actual output of the load module. When the acquired 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 to the load module. Because the load module is a power consuming device, the current actual output of the load module interface is not negative in a normal state. Therefore, when the acquired current actual output of the load module interface is a negative number, it indicates that the load module is abnormal.

[0039] The power grid module interface refers to an interface through which the power grid module accesses the power management system, and the power grid may be a municipal power grid. Obtaining interface output information at the power grid module interface can obtain a current actual output of the power grid module interface, including the magnitude and flow direction of the interface output of the power grid module interface. 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. When the obtained current actual output of the power grid module interface is a positive number, the power grid module is in a power absorption state, and the flow direction of the interface output of the power grid module interface is from the power management system to the power grid module. When the obtained current actual output of the power grid module interface is a negative number, the power grid module is in a discharge state, and the flow direction of the interface output of the power grid module interface is from the power grid module to the power management system.

[0040] In some embodiments, if a fault occurs in the energy storage module interface, the maximum charging output and the maximum discharging 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 charging 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 discharging output of the energy storage module interface is set to 0. The maximum charging output may be the maximum allowable charging power of the energy storage module, specifically the maximum allowable charging power of the storage battery, and the maximum discharging output may represent the maximum discharging output of the energy storage module, specifically the maximum discharging output of the storage battery.

[0041] If a fault occurs in the energy storage module interface, the energy storage module interface cannot transfer power to or receive power from the power management system. If a fault occurs in the energy storage module interface, the interface may fail, the energy storage device may fail, or the DC-DC bidirectional converter may fail. It should be understood that the above types of energy storage module interface failure are merely examples, and the present invention does not limit the specific circumstances of an energy storage module interface failure. If the above fault occurs in the energy storage module interface, the power management system according to the present invention sets the maximum charging output and maximum discharging output of the energy storage module interface to 0, so that the energy storage module interface cannot charge or discharge, and the insufficient power output of the power management system will not flow through the energy storage module interface, nor will the surplus power output of the power management system flow to the energy storage module interface. That is, if a fault occurs in the energy storage module interface, the power management system sets the maximum charging output and maximum discharging output of the energy storage module interface to 0, and then the energy management in the power management system eliminates the energy storage module interface and manages the energy flow among the photovoltaic power generation module interface, the load module interface, and the power grid module interface. Therefore, if a fault occurs in the energy storage module interface, the other modules in the power management system can still operate normally and will not be 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 high value, and the energy storage device will not continue charging. Therefore, the maximum charging output is set to 0. The first preset value may be 95% or 98% of the total capacity of the energy storage device. The first preset value can be determined by the user and is not specifically limited herein.

[0043] If the energy storage capacity of the energy storage module interface is smaller than the second preset value, it indicates that the energy storage device continues discharging, and if the energy storage capacity is smaller than the second preset value, the battery does not continue discharging. Therefore, the maximum discharge output is set to 0. The second preset value can be the energy storage capacity * (1 - discharge depth), and the discharge depth can be 95% or 98%, and the discharge depth is the ratio between the currently discharged power of the battery pack and the total capacity of the battery pack, and in the present invention, the ratio is expressed in the form of a percentage. The expression form can also be a decimal, and the expression form is not specifically limited herein.

[0044] When the energy storage capacity of the energy storage module interface exceeds a first preset value, it indicates that the energy storage module's power storage capability has reached a preset maximum value and cannot continue charging, which would otherwise affect the battery's service life. Therefore, the power management system sets the maximum charging output of the energy storage module interface to 0, thereby realizing the power management system no longer charging the energy storage module. Similarly, when the energy storage capacity of the energy storage module interface is smaller than a second preset value, it indicates that the energy storage module has already discharged or nearly discharged all of its power and cannot continue discharging, which would otherwise affect the battery's service life. Therefore, the power management system sets the maximum discharging output of the energy storage module interface to 0, thereby realizing the power management system no longer discharging the energy storage module.

[0045] Referring to FIG. 5, in a specific implementation process, FIG. 5 is a flowchart for setting the battery charge and discharge output of the energy storage module interface of an energy storage system according to an embodiment of the present disclosure. As can be seen from FIG. 5, after the program enters the setting program, the current battery capacity, battery discharge depth, preset maximum charge output, and preset maximum discharge output of the energy storage module interface are first obtained from the data storage device. First, it is determined whether the relationship between battery capacity and discharge depth satisfies SOC>1-DOD. If so, it is further determined whether the SOC is less than a preset height value. If the SOC is less than the preset height value, it indicates that the energy storage module interface is not fully charged, and charging or discharging is possible. If the SOC is greater than the preset height value, it indicates that the energy storage module interface is fully charged and cannot be charged, i.e., the preset maximum charge output is 0, and only discharge is possible. The discharge output is limited according to actual conditions and is not limited here. If the SOC is less than 1-DOD, it indicates that the battery pack has discharged the power stored inside, i.e., the maximum discharge output is 0. At this time, the energy storage module interface can only be charged and cannot be discharged.

[0046] In some other embodiments, if a fault occurs in the photovoltaic power generation module interface, the current actual output of the photovoltaic power generation module interface is set to 0. If a fault occurs in the photovoltaic power generation module interface, it indicates to the power management system that the photovoltaic power generation module interface cannot transmit power, and at this time, the current actual output corresponding to the photovoltaic power generation module interface is set to 0 to avoid affecting the control logic of other module interfaces. That is, if a fault occurs in the photovoltaic power generation module interface, the power management system sets the current actual output corresponding to the photovoltaic power generation module interface to 0, and then the energy management in the power management system eliminates the photovoltaic power generation module interface and performs energy flow management among the energy storage module interface, the load module interface, and the power grid module interface. Therefore, if a fault occurs in the photovoltaic power generation module interface, the other modules in the power management system can still operate normally and not be affected.

[0047] In the embodiments of the present application, when one or more module interfaces in a power management system fail, other module interfaces can operate normally, while in the power management system of the related art, when one of the module interfaces fails, the power management system cannot operate. This solves this problem, making the power management of the power management system smarter and improving the user experience.

[0048] Step S120: Determine a target output power of the power management system based on the magnitude and flow direction of the interface output in the interface output information corresponding to each interface selectively acquired, where the target output power is the output power that the power management system requests the energy storage module interface to supply or absorb energy. In the implementation of this embodiment, the operating modes include a self-powered / self-extinguishing mode, a peak cut / bottom fill mode, and an energy storage priority mode.

[0049] It should be understood that the power management system performs energy management on four parts, namely, the photovoltaic module interface, the energy storage module interface, the load module interface, and the power grid module interface. The current actual output of the photovoltaic module interface is mainly determined by external factors such as the current light intensity and temperature. The current actual output of the energy storage module interface is mainly determined by the current power consumption status of the power consumption devices in the access system. The current actual output of the power grid module interface is mainly determined by the power management system's current operating mode and the power information of the municipal power grid's power flow settings. From this, it can be seen that the power management system is a more passive management of the three module interfaces, namely, the photovoltaic module interface, the energy storage module interface, and the power grid module interface. Therefore, the power management system can selectively obtain interface output information of the photovoltaic module interface, the load module interface, and the power grid module interface in different operating modes, and then determine a target call output to be replenished or absorbed by the power management system based on the selectively obtained interface output information. The power management system then calls the energy storage module interface based on the target call output to supply or absorb energy according to the target call output.

[0050] The calculation process of the target call power of the power management system in different operation modes will be described in detail below.

[0051] The spontaneous self-extinguishing mode refers to the fact that the power in the power management system is obtained from the photovoltaic power generation module interface to supply the energy storage module and the power demand of the load module. For example, if there is surplus power in the power management system, it will be transferred to the power grid module interface. If the power management system calls the energy storage module but the power demand of the load module interface is not met, power can be replenished from the power grid module interface. It should be understood that in the spontaneous self-extinguishing mode, the power grid module does not require the power management system to set the power flow, and in the spontaneous self-extinguishing mode, surplus power generated by photovoltaic power generation can be reverse-flowed, and if the energy storage module cannot replenish the shortage of power, it will be replenished from the power grid.

[0052] In the self-powered / self-extinguishing mode, the power grid module does not have strict requirements for the power flow power setting of the power management system, so in this mode, it can only obtain the current actual output of the photovoltaic power generation module interface and the load module interface, and determine the target call output in the power management system according to the difference between the current actual output of the photovoltaic power generation 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 the self-powered / self-extinguishing mode, if the calculated target call output P is a positive number, it indicates that the power generated by the photovoltaic power generation is greater than the power for the load, and the power management system has excess 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 other embodiments, if the target call output is greater than the maximum charging output of the energy storage module interface (the set charging direction is positive), the charging power of the energy storage module interface is set to the maximum charging output, and the energy storage module interface maintains the maximum charging output to absorb power from the power management system. If the calculated target call output P is a negative number, it indicates that the power generated by the photovoltaic power generation is less than the power for the load, and the power management system needs power supplementation. 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, when the target call output is the maximum discharge output of the energy storage module interface (the set discharge direction is negative), the discharge output of the energy storage module interface is set to the maximum discharge output, and at this time, the energy storage module interface maintains the maximum discharge output and discharges to the power management system.

[0055] The peak cut bottom fill mode refers to the case 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 large, so the power management system needs to supply energy to the power grid with a large peak cut bottom fill power, and the power generated by the photovoltaic power generation module in the power management system not only supplies the energy storage module and the load module, but also supplies power to the power grid with a flow set output. When power usage of the power grid is low, the power demand of the power grid decreases, so the power management system can transfer energy to the power grid with a small flow set output or not transfer energy to the power grid. Furthermore, when the energy consumption demand of the load connected to the load module interface in the power management system is too large, the power grid can transfer energy to the power management system with a flow set output, so as to maintain a stable and sufficient power of the power management system.

[0056] In peak cut bottom fill mode, the power management system needs to further transmit or supplement power to the power grid module at the current power grid flow set output, so in this mode, the power management system needs to respectively obtain the current actual output of the photovoltaic power generation module interface, the current actual output of the load module interface, and the current power grid flow set output of the power grid module interface, and determine the target call output in the power management system based on the difference between the current actual output of the photovoltaic power generation module interface, the current actual output of the load module interface, and the current power grid flow set output of the power grid module interface.

[0057]

number

[0058] In some embodiments, in peak cut bottom fill mode, if the calculated target call power P is a positive number, the power generated by the photovoltaic power generation is greater than the sum of the load power and the current power flow setting of the power grid module, indicating that the power management system has excess power output. Therefore, the power management system needs to call the energy storage module interface to absorb energy according to the target call power, i.e., call the energy storage module interface to charge. In other embodiments, if the target call power is greater than the maximum charging output of the energy storage module interface (the set charging direction is positive), the charging power of the energy storage module interface is set to the maximum charging output, and the energy storage module interface maintains the maximum charging output to absorb power from the power management system. If the calculated target call power P is a negative number, the power generated by the photovoltaic power generation is less than the load power, indicating that the power management system needs power supplementation. Therefore, the power management system needs to call the energy storage module interface to supply energy according to the target call power, i.e., call the energy storage module interface to discharge. In some further embodiments, when the target call output is the maximum discharge output of the energy storage module interface (the set discharge direction is negative), the discharge output of the energy storage module interface is set to the maximum discharge output, and at this time, the energy storage module interface maintains the maximum discharge output and discharges to the power management system.

[0059] The energy storage priority mode refers to the power management system obtaining power from the photovoltaic 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, and preferentially ensuring that the energy of the energy storage module is as fully charged as possible or reaches a preset maximum power value. It should be understood that in the energy storage priority mode, the power grid module does not require the power management system to set the flow power, and in the energy storage priority mode, surplus power generated by the photovoltaic power generation can be introduced into the power grid, and if the energy storage module cannot replenish the missing power, it will be replenished from the power grid.

[0060] In the energy storage priority mode, the power grid module does not have strict requirements for the power flow power setting on the power management system, so in this mode, it can only obtain the current actual output of the photovoltaic power generation module interface and the load module interface, so the power management system determines the target call output in the power management system according to the difference between the current actual output of the photovoltaic power generation module interface and the current actual output of the load module interface.

[0061]

number

[0062] In some embodiments, in energy storage priority mode, if the calculated target call power P is a positive number, it indicates that the power generated by the photovoltaic power generation is greater than the power for the load and the power management system has excess power output, so the power management system needs to call the energy storage module interface to absorb energy according to the target call power, i.e., call the energy storage module interface to charge. In energy storage priority mode, the energy storage module is prioritized for charging, and it is prioritized to ensure that the power of the energy storage module is as fully charged as possible or reaches a preset maximum power value, so the power management system can always set the charging power of the energy storage module interface to the maximum charging output, and power from the energy storage module interface can be obtained from both the photovoltaic power generation module and the power grid module. If the calculated target call power P is a negative number, it indicates that the power generated by the photovoltaic power generation is less than the power for the load and the power management system needs to be supplemented, so the power management system needs to call the energy storage module interface to supply energy according to the target call power, i.e., call the energy storage module interface to discharge. In some other embodiments, when the target call output is smaller than the maximum discharge output of the energy storage module interface (the set discharge direction is negative), the discharge output of the energy storage module interface is set to the maximum discharge output, and at this time, the energy storage module interface maintains the maximum discharge output and discharges to the power management system.

[0063] In the above-mentioned self-extinguishing mode or energy storage priority mode, when the power grid backflow prevention function of the power management system is set to an activated state, the maximum reverse power of the power grid module interface is set to 0. In order to prevent excess power in the power management system from being transferred to the power grid module interface in the self-extinguishing mode or energy storage priority mode, the power grid backflow prevention function is set to an activated state at this time, and the maximum reverse power of the power grid module interface is correspondingly set to 0, which is favorable for power circulation calling in the power management system.

[0064] The following describes in detail the PV limiting operation used when the power generation amount of the photovoltaic module interface is large.

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

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

[0067]

number

[0068]

number

[0069] In the above power management system, the maximum energy supply output of the photovoltaic power generation module interface is limited to the sum of the three allowable outputs of the energy storage module interface, the load module interface, and the power grid module interface in different operating modes, thereby preventing damage to the energy storage module interface, the load module interface, or the power grid module interface due to excessive energy supply output of the photovoltaic power generation module interface.

[0070] In some embodiments, the maximum energy delivery output P of the photovoltaic module interface determined in the different operating modes PvMax is the maximum photovoltaic power generated by the photovoltaic module determined according to maximum power point tracking (MPPT), P MPPT If it is larger, the maximum energy supply output P of the photovoltaic module interface PvMax P MPPT Limit the load to within 100mW to avoid damaging the solar module.

[0071] Step S130: Determine the power output shortage or power output surplus of the power management system based on the target power call, and then call the energy storage module interface to supply energy according to the power output shortage or absorb energy according to the power output surplus.

[0072] If the target call output is a negative number, it indicates that the power management system needs to replenish power output from the energy storage module interface, so the power management system calls the energy storage module interface to 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 the power management system has surplus power output and needs to absorb energy through the energy storage module interface, so 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 power deficit 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, and when the absolute value of the power surplus output exceeds the absolute value of the 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. Through the above operations, the energy storage module can be effectively protected and damage to the energy storage module caused by exceeding the maximum discharge output and maximum charge output of the energy storage module can be avoided.

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

[0075] For a specific implementation process, please refer to Figure 6, which is a diagram of the energy interaction between multiple module interfaces in an energy storage system in self-powered self-extinguishing 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 an inverter module (Inverter), thereby forming an energy storage system. The inverter module (Inverter) includes 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 main energy source direction and main energy output direction of the module. Continuing with Figure 6, in the self-powered self-extinguishing mode, the target call output P of the power management system in self-powered self-extinguishing mode is P = P pv -P epsUsing this as the judgment criterion, the power management system can be divided into six operating states, including battery supplementary charging state, battery power grid supplementary charging state, overload state, battery charging state, battery power grid charging state, and photovoltaic power generation limit state.

[0076] Target call output P∈[-P dscMax , 0), the power management system is in a battery supplement charging state. In this state, the power management system calculates the target calling output and finds that the power generated by the photovoltaic power generation module interface is still not enough to meet the power usage output of the load module interface, but the difference between the two is within the maximum discharge output of the energy storage module interface, so the power management system calls the energy storage module interface to make up for 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 ), 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 photovoltaic power generation module interface and the maximum discharge output of the energy storage module interface is still not enough to meet the power usage output of the load module interface, but the insufficient power usage output of the load module interface is within the maximum power that the power grid module interface can absorb from the power grid, so 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 dscMax), the power management system is in an overload 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 power generation module interface, the maximum discharge output of the energy storage module interface, and the maximum power absorbed by the power grid module interface from the power grid 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 tripping shutdown process can be adopted to avoid damage to the power management system.

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

[0080] Target call output P∈(P chgMax , P chgMax +P goutMax], 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 power generation module interface exceeds the power usage demand of the load module interface, and the surplus power output also exceeds the maximum charging output of the energy storage module interface, but does not exceed the sum of the maximum charging output of the energy storage module interface and the maximum reverse flow power of the power grid module interface. Therefore, the power management system calls the energy storage module interface and the power grid module interface to simultaneously absorb the surplus power output. In some embodiments, the power management system preferentially allows the energy storage module interface to absorb the surplus power output at the maximum charging 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 , +∞), the power management system is in a photovoltaic power generation limiting state. In this state, the power management system calculates the target call output and finds that the power generated by the photovoltaic power generation module interface exceeds the power consumption demand of the load module interface, and the surplus power output exceeds the sum of the maximum charging output of the energy storage module interface and the maximum reverse power of the power grid module interface. Therefore, the power management system can perform PV limiting on the photovoltaic power generation module interface, i.e., limit the maximum power generation of the photovoltaic power generation module. In some embodiments, it can perform MPPT (Maximum Power Point Tracking) limiting on the photovoltaic power generation module.

[0082] In some embodiments, before invoking 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 of the minimum power amount, for example, whether the power amount is less than 5%. If so, it indicates that the power amount of the energy storage module interface has reached its limit, and sets the maximum discharge output of the energy storage module interface to 0, thereby achieving the purpose of preventing the energy storage module interface from discharging.

[0083] In some embodiments, before calling the 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 of the maximum power amount, for example, whether the power amount is higher than 95%. If so, it indicates that the charging amount of the energy storage module interface has reached its peak limit, so the maximum charging output of the energy storage module interface is set to 0, thereby achieving the purpose of preventing the energy storage module interface from charging.

[0084] Referring to FIG. 7, FIG. 7 is a diagram illustrating the interaction of multiple module interface energy 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 Using this as the judgment criterion, the power management system can be divided into five operating states, including battery supplementary charging state when power grid flow fluctuates, battery supplementary charging state, battery charging state, battery charging state when photovoltaic power generation is limited, and battery charging state when power grid flow fluctuates.

[0085] Target call output P∈[-P dscMax, 0), the power management system is in a battery supplement charging state. In this state, the power management system calculates the target call output and finds that the generated power of the photovoltaic power generation 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 the three is within the maximum discharge output of the energy storage module interface, so the power management system calls the energy storage module interface to make up for the insufficient power output, allowing the load module interface and the power grid module interface to meet the power usage demand during power flow fluctuations.

[0086] Target call output P∈(-∞, -P dscMax ), the power management system is in a battery supplementary charging state during power grid flow fluctuation. In this state, the power management system calculates the target call output and finds that the sum of the power generated by the photovoltaic power generation 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 flow setting output in the power grid flow, indicating that the reverse flow power required by the power grid in the power management system is too high and cannot be borne by the energy storage module interface and the photovoltaic power generation module interface. In some embodiments, the supplied power grid flow power is reduced and more power is transferred to the load module interface to ensure that the load corresponding to the load module interface operates normally.

[0087] Target call output P∈(0, P chgMax], 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 photovoltaic power generation 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 the surplus power output is within the maximum charging output of the energy storage module interface, so the power management system calls the energy storage module interface to absorb the surplus power output, thereby achieving balance in the power flow in the power management system.

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

[0089] Target call output P∈(P chgMax +P pv, +∞), the power management system is in a battery charging state when the power grid flow fluctuates. In this state, the power management system calculates the target call output and finds that the power delivered by the power grid module interface to the power management system when the power grid flow fluctuates exceeds the power demand of the load module interface, and the surplus power output exceeds the maximum charging output of the energy storage module interface.

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

[0091] Target call output P∈[P chgMax -P ginMax , P chgMax ), 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 photovoltaic power generation module interface and the maximum discharge output power of the energy storage module interface does not meet the power usage output of the load module interface, but the power usage output that is insufficient at the load module interface is the maximum power of the energy absorbed by the power grid module interface from the power grid, so 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.

[0092] Target call output P∈(-∞, P chgMax -P ginMax), the power management system is in an overload state. In this state, the power management system calculates the target call output and finds that the sum of the generated power of the photovoltaic power generation module interface, the maximum discharge output of the energy storage module interface, and the maximum power absorbed from the power grid by the power grid module interface cannot meet the power usage demand of the load module interface, indicating that the load on the power management system is excessive. In some embodiments, a tripping shutdown process is adopted to avoid damage to the power management system.

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

[0094] In some other embodiments, the current operating mode and target call output of the power management system can be calculated backward based on the operating state of the power management system. When a certain operating state indicates a fault, it can be located quickly, saving time in fault location and solving the problem of the difficulty of fault location using integrated control logic.

[0095] The means of the present application determines interface output information corresponding to multiple module interfaces in the power management system according to different operating modes, determines a target call output in the power management system according to the interface output information, and finally determines whether to obtain deficit power from the energy storage module interface or transfer 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 operating modes, the adverse effects of integrated control logic can be avoided, and the control logic of the operating modes and module interfaces are independent from each other. As the operating modes or module interfaces increase, the existing control logic will not be affected, and the scalability of the power management system can be improved.

[0096] 9 is a structural block diagram of a power conditioning device 300 according to an embodiment of the present disclosure. The power conditioning device 300 is applied to the electronic device 100 and includes an interface output information acquisition module 310, a target call power 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 each of the photovoltaic power generation module interface, the load module interface, and the power grid module interface according to the current operation mode of the power management system, where the interface output information includes the magnitude and flow direction of the interface output. The target call power determination module 320 is used to determine the target call power of the power management system based on the magnitude and flow direction of the interface output in the selectively acquired interface output information corresponding to each interface. The target call power is the output at which the power management system requests the energy storage module interface to supply or absorb energy. The adjustment module 330 is used to determine the shortage power output or the surplus power output of the power management system based on the target call output, and further call the energy storage module interface to supply energy according to the shortage power output or absorb energy according to the surplus power output.

[0097] In some embodiments of the present application, the power regulating device 300 further includes: an energy supply output determination module of an energy storage module interface, for setting the absolute value of the energy supply output of the energy storage module interface as the absolute value of the preset maximum discharge output when the absolute value of the deficit 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 of an energy storage module interface, for setting the absolute value of the energy absorption output of the energy storage module interface as 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 application, the power regulating device 300 further includes: an energy storage module interface failure power setting module for setting the maximum charging output and the maximum discharging output of the energy storage module interface to 0 when a failure occurs in the energy storage module interface; a power setting module for when the energy storage capacity of the energy storage module interface exceeds a first preset value, for setting the maximum charging 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; and a power setting module for when the energy storage capacity of the energy storage module interface is lower than a second preset value, for setting the maximum discharging 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.

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

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

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

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

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

[0104] In some embodiments, the energy supply output limiting module of the first solar power generation module interface comprises an energy supply output limiting module of the solar power generation module interface in the self-extinguishing mode for limiting the energy supply output of the solar power generation module interface to a sum of three values: the maximum charging output of the energy storage module interface, the current actual output of the load module interface, and the maximum reverse flow power of the power grid module interface, when the energy supply output of the solar power generation module interface in the self-extinguishing mode exceeds the sum of the three values.

[0105] In some embodiments, the energy supply output limiting module of the first solar power generation module interface further comprises an energy supply output limiting module of the solar power generation module interface in peak cut bottom fill mode for limiting the energy supply output of the solar power generation module interface to a sum of three values: a maximum charging output of the energy storage module interface, a current actual output of the load module interface, and a current power grid flow setting output of the power grid module interface, when the energy supply output of the solar power generation module interface in the peak cut bottom fill mode exceeds a sum of three values.

[0106] In some embodiments, the energy supply output limiting module of the first solar power generation module interface further comprises an energy supply output limiting module of the solar power generation module interface in an energy storage priority mode for limiting the energy supply output of the solar power generation module interface to a sum of three values: a maximum charging output of the energy storage module interface, a current actual output of the load module interface, and a maximum reverse flow power of the power grid module interface, when the energy supply output of the solar power generation module interface in the energy storage priority mode exceeds the sum of the three values.

[0107] In some embodiments, the power regulating device 300 further includes a power grid backflow prevention module for setting a maximum reverse flow power of the power grid module interface to 0 when a power grid backflow prevention function of the power management system is set to an activated state in the autonomous self-extinguishing mode or the energy storage priority mode.

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

[0109] For convenience and brevity of explanation, those skilled in the art may refer to the corresponding processes in the above method embodiments for the specific operation processes of the above-mentioned devices and modules, and the description will not be repeated here.

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

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

[0112] 10 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 with data transmission. The electronic device 100 in the present application may include one or more of a processor 110, a memory 120, and one or more application programs, where the one or more application programs can be stored in the memory 120 and configured to be executed by the one or more processors 110, and the one or more programs are configured to perform the method described in the above-mentioned method embodiment.

[0113] The processor 110 may include one or more processing cores. The processor 110 connects various internal components of the entire electronic device 100 using various interfaces and lines, and executes instructions, programs, code sets, or instruction sets stored in the memory 120 and accesses data stored in the memory 120 to perform various functions and process data of the electronic device 100. Alternatively, the processor 110 may be implemented in at least one hardware form of a digital signal processing (DSP), a field-programmable gate array (FPGA), or a programmable logic array (PLA). The processor 110 may integrate one or more combinations of a central processing unit (CPU), a graphics processing unit (GPU), a modem, etc. Here, the CPU mainly processes the operating system, user interface, and application programs, the GPU is responsible for rendering and drawing display content, and the modem is responsible for wireless communication processing. As can be appreciated, the modem can be implemented as a separate communication chip rather than being integrated into the processor 110 .

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

[0115] 11, there is shown a structural block diagram of a computer-readable storage medium according to an embodiment of the present application, in which program code is stored, and the program code is called by a processor to perform the method described in the above method embodiment.

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

[0117] Finally, it should be noted that the above embodiments are not limiting but are merely intended to illustrate the technical solutions of the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may still modify the technical solutions described in the above embodiments or substitute some of the technical features therein with equivalents, and such modifications or substitutions will not deviate from the essence of the corresponding technical solutions and the spirit and scope of the technical solutions of the embodiments of the present application. Cross-Reference to Related Applications

[0118] This application claims priority to and benefits from patent application number 202311010122.4, filed with the State Intellectual Property Office of China on August 10, 2023, the entire contents of which are incorporated herein by reference.

Claims

1. 1. A power regulation method applied to a power management system, the power management system being used to manage power output between a photovoltaic power generation module interface, an energy storage module interface, a load module interface, and a power grid module interface, the power regulation method comprising: Selectively obtaining interface output information corresponding to each of the photovoltaic power generation module interface, the load module interface, and the power grid module interface according to a current operation mode of the power management system, wherein the interface output information includes an interface output magnitude and an interface output flow direction; 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 interface selectively acquired, the target call output being an output that the power management system requests from the energy storage module interface to supply or absorb energy; determining a power output shortage or power output surplus of the power management system based on the target power call, and calling the energy storage module interface to supply energy according to the power output shortage or absorb energy according to the power output surplus.

2. The power adjustment method includes: When the absolute value of the power shortage output exceeds the absolute value of the maximum discharge output of the energy storage module interface, setting the absolute value of the energy supply output of the energy storage module interface to the absolute value of the maximum discharge output; 2. The power regulating method according to claim 1, further comprising: when the absolute value of the surplus power output exceeds the absolute value of a maximum charging output of the energy storage module interface, setting the absolute value of the energy absorption output of the energy storage module interface to the absolute value of the maximum charging output.

3. The power adjustment method includes: If a fault occurs in the energy storage module interface, setting the maximum charging output and the maximum discharging output of the energy storage module interface to 0; setting the maximum charging 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; 2. The power regulating method of claim 1, further comprising: 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.

4. The power regulation method according to claim 1 , wherein the operation modes include a self-power-off mode, a peak-cut bottom-fill mode, and an energy-storage-priority mode.

5. The step of selectively obtaining interface output information corresponding to each of the photovoltaic power generation module interface, the load module interface, and the power grid module interface according to a current operation mode of the power management system includes: In the self-powered / self-extinguishing mode, obtaining current actual outputs of the photovoltaic power generation module interface and the load module interface respectively; 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 interface selectively acquired, 5. The power regulating method of claim 4, further comprising determining the target call output in the power management system based on a difference between a current actual output of the solar power generation module interface and a current actual output of the load module interface.

6. The step of selectively obtaining interface output information corresponding to each of the photovoltaic power generation module interface, the load module interface, and the power grid module interface according to a current operation mode of the power management system includes: In the peak cut bottom fill mode, respectively obtaining a current actual output of the photovoltaic power generation module interface, a current actual output of the load module interface, and a current power grid flow setting output of the power grid module interface; 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 interface selectively acquired, 5. The power regulating method of claim 4, further comprising: determining the target call output in the power management system based on a difference between a current actual output of the photovoltaic power generation module interface, a current actual output of the load module interface, and a current power grid flow set output of the power grid module interface.

7. The step of selectively obtaining interface output information corresponding to each of the photovoltaic power generation module interface, the load module interface, and the power grid module interface according to a current operation mode of the power management system includes: In the energy storage priority mode, respectively obtaining a current actual output of the photovoltaic power generation module interface and a current actual output of the load module interface; 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 interface selectively acquired, 5. The power regulating method of claim 4, further comprising determining the target call output in the power management system based on a difference between a current actual output of the solar power generation module interface and a current actual output of the load module interface.

8. The power adjustment method includes: When the energy supply output of the photovoltaic power generation 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 under the current operating mode of the power management system, limiting the energy supply output of the photovoltaic power generation module interface to the sum of the allowable outputs; and 5. The power regulating method according to claim 4, further comprising the step of limiting the energy supply output of the photovoltaic module interface to the maximum energy supply output when the sum of the allowed outputs exceeds the maximum energy supply output of the photovoltaic module interface.

9. When the energy supply output of the photovoltaic power generation module interface exceeds the total of the three allowable outputs of the energy storage module interface, the load module interface and the power grid module interface in the current operation mode of the power management system, the step of limiting the energy supply output of the photovoltaic power generation module interface to the total of the allowable outputs includes:

9. The power regulating method according to claim 8, further comprising: in the self-powered / self-extinguishing mode, when the energy supply output of the photovoltaic power generation module interface exceeds a sum of three values: a maximum charging output of the energy storage module interface, a current actual output of the load module interface, and a maximum reverse flow power of the power grid module interface, limiting the energy supply output of the photovoltaic power generation module interface to a sum of the three values.

10. When the energy supply output of the photovoltaic power generation module interface exceeds the total of the three allowable outputs of the energy storage module interface, the load module interface and the power grid module interface in the current operation mode of the power management system, the step of limiting the energy supply output of the photovoltaic power generation module interface to the total of the allowable outputs includes:

9. The power regulating method according to claim 8, further comprising: when, in the peak cut bottom fill mode, the energy supply output of the solar power generation module interface exceeds a sum of three values: a maximum charging output of the energy storage module interface, a current actual output of the load module interface, and a current power grid flow setting output of the power grid module interface, limiting the energy supply output of the solar power generation module interface to a sum of the three values.

11. When the energy supply output of the photovoltaic power generation module interface exceeds the total of the three allowable outputs of the energy storage module interface, the load module interface and the power grid module interface in the current operation mode of the power management system, the step of limiting the energy supply output of the photovoltaic power generation module interface to the total of the allowable outputs includes:

9. The power regulating method of claim 8, further comprising: in the energy storage priority mode, when the energy supply output of the solar power generation module interface exceeds a sum of three values: a maximum charging output of the energy storage module interface, a current actual output of the load module interface, and a maximum reverse flow power of the power grid module interface, limiting the energy supply output of the solar power generation module interface to a sum of the three values.

12. The power adjustment method includes:

5. The power regulating method according to claim 4, further comprising: setting a maximum reverse flow power of the power grid module interface to 0 when a power grid backflow prevention function of the power management system is set to an activated state in the autonomous self-extinguishing mode or the energy storage priority mode.

13. The power regulation method of claim 4 , further comprising determining an operating state of the power management system based on a current operating mode of the power management system and the target call output.

14. A power conditioning device, the power conditioning device comprising: an interface output information acquisition module for selectively acquiring 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 the power management system, wherein the interface output information includes a magnitude of the interface output and a flow direction of the interface output; a target call output determination module for 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 interface selectively acquired, the target call output being an output to which an energy storage module interface requests the power management system to supply or absorb energy; a power adjustment module for determining a power shortage output or a power surplus output of the power management system based on the target power call, and for calling the energy storage module interface to supply energy according to the power shortage output or absorb energy according to the power surplus output.

15. An electronic device, one or more processors; Memory and 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 of any one of claims 1 to 13.

16. A computer-readable storage medium, the computer-readable storage medium storing program code, the program code being called by a processor to execute the power adjustment method according to any one of claims 1 to 13.

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