An intelligent optical storage and charging system and method based on high-frequency isolation interconnection router

Abstract

The application provides a kind of intelligent light storage and charging system and method based on high-frequency isolation interconnection router, the system includes photovoltaic power generation module, photovoltaic interface conversion unit, public DC bus, grid interface conversion unit, charging load interface conversion unit, high-frequency isolation interconnection router, energy storage battery interface module, energy storage battery group, battery state acquisition, battery health assessment and the comprehensive battery management system of route participation qualification determination, and centralized controller;Centralized controller is used to determine target battery cluster set, target dual active bridge isolation submodule set and corresponding controlled switching state, and generates the phase shift control quantity of dual active bridge isolation submodule put into operation and the execution control quantity of each interface conversion unit, to realize the reconfigurable high-frequency isolation energy routing between public DC bus and energy storage side and energy storage side adaptive charging and discharging.The application can improve system isolation safety, bus voltage stabilizing capacity, power distribution flexibility and operation reliability.

Description

Technical Field

[0001] This invention relates to the field of intelligent photovoltaic energy storage and charging technology and power electronic energy conversion technology, and in particular to an intelligent photovoltaic energy storage and charging system and method based on a high-frequency isolated interconnect router. Background Technology

[0002] With the rapid development of photovoltaic power generation, energy storage systems, and electric vehicle charging infrastructure, integrated photovoltaic-energy storage-charging systems are gradually becoming an important technological route for the comprehensive utilization of new energy. Existing photovoltaic-energy storage-charging systems typically achieve energy interaction through photovoltaic power generation units, energy storage battery units, grid interface units, and charging load units to meet the needs of distributed generation consumption, peak shaving and valley filling of energy storage, and stable energy supply to charging loads. This type of system plays a crucial role in improving the utilization rate of renewable energy, mitigating grid impacts, and enhancing the operational flexibility of charging stations.

[0003] However, existing photovoltaic-storage-charging systems still have problems. Photovoltaic power generation output is random and fluctuating, and the charging load power changes rapidly. Traditional systems are prone to voltage fluctuations on the common bus when operating with multi-port coupling, resulting in insufficient dynamic response capability. On the other hand, existing energy storage access methods mostly adopt non-isolated bidirectional conversion structures or power frequency isolation schemes. The former has shortcomings in terms of safety isolation, voltage matching, and fault suppression, while the latter suffers from large size, low power density, and low efficiency. In addition, traditional control methods mostly adopt distributed control or single-layer control strategies, which are difficult to coordinate with multiple objectives such as prioritizing photovoltaic consumption, orderly charging and discharging of energy storage, grid-friendly interaction, and dynamic allocation of charging load.

[0004] Therefore, there is an urgent need to propose an intelligent optical energy storage and charging system based on a high-frequency isolated interconnect router to solve the problems of insufficient isolation, inflexible power regulation, poor bus stability, and insufficient multi-port collaborative control capability in the existing technology. Summary of the Invention

[0005] Purpose of the Invention: The purpose of this invention is to address the problems existing in current photovoltaic-storage-charging systems, such as insufficient isolation performance, inflexible power regulation, poor stability of the common DC bus voltage, and insufficient collaborative control capabilities among photovoltaic power generation, energy storage, the grid, and charging loads. It provides an intelligent photovoltaic-storage-charging system and method based on a high-frequency isolated interconnect router. By constructing a system architecture with the common DC bus as the energy collection center, the high-frequency isolated interconnect router as the bidirectional energy regulation hub, the energy storage battery interface module as the energy storage execution unit, and the centralized controller as the coordination and decision-making core, bidirectional energy transmission, flexible power allocation, and safe and stable operation among photovoltaic, grid, energy storage, and charging loads are achieved. This improves system isolation security, dynamic response performance, operating efficiency, photovoltaic absorption capacity, and charging power supply stability.

[0006] The system includes a photovoltaic power generation module, a photovoltaic interface conversion unit, a common DC bus, a grid interface conversion unit, a charging load interface conversion unit, a high-frequency isolated interconnection router, an energy storage battery interface module, an energy storage battery pack, a comprehensive battery management system (BMS) for battery status acquisition, battery health assessment and routing participation qualification determination, and a centralized controller.

[0007] The photovoltaic power generation module is connected to the common DC bus via a photovoltaic interface conversion unit. The grid interface conversion unit and the charging load interface conversion unit are respectively connected to the common DC bus. The common DC bus is connected to the energy storage battery interface module via a high-frequency isolated interconnection router. The energy storage battery interface module is connected to the energy storage battery pack.

[0008] The high-frequency isolated interconnect router includes two or more dual active bridge isolation sub-modules connected in parallel, and a controlled switching unit corresponding to each dual active bridge isolation sub-module. The high-voltage side of each dual active bridge isolation sub-module is connected in parallel to a common DC bus, and the low-voltage side is connected to the energy storage battery interface module through the corresponding controlled switching unit.

[0009] The energy storage battery pack includes two or more battery clusters. The integrated battery management system (BMS) is used to collect the status information of each battery cluster and calculate the routable evaluation parameter (RPW) corresponding to each battery cluster. The routable evaluation parameter (RPW) is used to characterize the suitability of the corresponding battery cluster to participate in the current energy routing.

[0010] The centralized controller is used to determine the target battery cluster set, the target dual active bridge isolation submodule set, and the corresponding controlled switching state based on the routable evaluation parameter RPW of each battery cluster, the target power of the energy storage side, the operating status of the common DC bus, and the operating status of each dual active bridge isolation submodule. It also generates the phase shift control quantity of the dual active bridge isolation submodules that are put into operation and the execution control quantity of each interface conversion unit to realize the reconfigurable high-frequency isolated energy routing between the common DC bus and the energy storage side and the adaptive charging and discharging of the energy storage side.

[0011] The photovoltaic interface conversion unit is used to regulate the DC voltage and DC current output by the photovoltaic power generation module, and performs maximum power point tracking control or power limiting control under the control of the centralized controller, so that the photovoltaic power generation module operates in the maximum power output state or the controlled output state; the photovoltaic output power is:

[0012] ,

[0013] in, Indicates the output power of the photovoltaic power generation module. Indicates the output voltage of the photovoltaic system. Indicates the photovoltaic output current;

[0014] The maximum power point of photovoltaic power satisfies:

[0015] ,

[0016] The photovoltaic interface conversion unit injects the power output from the photovoltaic power generation module into the common DC bus. When the photovoltaic power generation is greater than the power demand of the charging load, the centralized controller controls the system to prioritize power supply from the photovoltaic power generation module to the charging load, and transmits the remaining power to the energy storage battery pack for charging via the common DC bus, high-frequency isolated interconnection router, and energy storage battery interface module. When the photovoltaic power generation is less than or equal to the power demand of the charging load, the centralized controller controls the energy storage side and the grid side to compensate for the power deficit to the common DC bus.

[0017] When the photovoltaic interface conversion unit adopts a boost converter, the ideal steady-state voltage relationship is:

[0018] ,

[0019] in, Indicates the common DC bus voltage. Indicates the duty cycle of the photovoltaic interface conversion unit;

[0020] The centralized controller is based on the photovoltaic power reference value. Or adjust the duty cycle based on the maximum power point tracking result. To ensure that the photovoltaic output meets the following requirements: photovoltaic output power Approaching P pv ∗ , where P pv ∗ This indicates the target output power on the photovoltaic side.

[0021] The common DC bus is equipped with a bus support capacitor C. dc It is used to buffer energy and support voltage for power fluctuations between the photovoltaic side, grid side, energy storage side, and charging side; bus capacitor current. for:

[0022] ,

[0023] Where d represents the derivative and t represents time;

[0024] The following power relationship is satisfied on the bus side:

[0025] ,

[0026] in Indicates the output power of the photovoltaic side. Indicates the power exchange capacity on the grid side. Indicates the total power on the charging side. This represents the change in energy storage of the bus capacitor;

[0027] The centralized controller coordinates and controls each port based on the power balance relationship of the common DC bus. The power balance relationship includes the sum of the power input from the photovoltaic side to the common DC bus, the power exchanged between the grid side and the common DC bus, and the power exchanged between the energy storage side and the common DC bus, which is equal to the sum of the power output from the charging side to the common DC bus, the system loss power, and the power corresponding to the change in energy storage on the common DC bus.

[0028] Under steady-state conditions, the centralized controller adjusts the control quantities of the photovoltaic interface conversion unit, the grid interface conversion unit, the charging interface conversion unit, and the high-frequency isolated interconnection router to keep the input power and output power of the common DC bus balanced and stabilize the voltage of the common DC bus near a preset reference value.

[0029] Define the switching state variable of the i-th dual active bridge isolation submodule. for:

[0030] ,

[0031] in, This indicates that the i-th dual active bridge isolation submodule is now operational. This indicates that the i-th dual active bridge isolation submodule has exited operation; N represents the total number of dual active bridge isolation submodules.

[0032] The total transmission power of a modular high-frequency isolated interconnect router is expressed as:

[0033] ,

[0034] in, The transmission power undertaken by the i-th dual active bridge isolation submodule;

[0035] Under single-phase shift control, the average transmission power of the i-th dual active bridge isolation submodule is expressed as:

[0036] ,

[0037] in, The voltage on the high-voltage side of the i-th submodule is... For the low-voltage side voltage of the i-th submodule, Let be the turns ratio of the i-th high-frequency isolation transformer. Let i be the switching frequency of the i-th submodule. Let i be the series inductance or equivalent leakage inductance of the i-th submodule. The normalized phase shift ratio of the i-th submodule is expressed as:

[0038] ,

[0039] in, For the global fundamental phase shift, Correct the phase shift for the i-th submodule.

[0040] The centralized controller solves for the following joint optimization objective function:

[0041] ,

[0042] in, For the loss of the i-th submodule, Let i be the current of the i-th submodule. The average current of the sub-modules put into operation. For the target power of the energy storage side, To optimize the weighting coefficients for loss, These are the flow control weighting coefficients. The switching smoothing weighting coefficients are used. For power tracking weighting coefficients, This is the switching state variable of the i-th dual active bridge isolation submodule in the previous control cycle.

[0043] The grid interface conversion unit is used to realize bidirectional power exchange between the system and the external AC grid. When the power inside the system is insufficient, it absorbs electrical energy from the external grid and injects it into the common DC bus. When the power inside the system is surplus, it feeds the electrical energy from the common DC bus back to the external grid. The grid-side exchange power is expressed as:

[0044] ,

[0045] Among them, u a ,u b ,u c For the three-phase power grid voltage, i a i b i c For the three-phase grid-connected current, P grid This refers to the power exchanged between the system and the power grid.

[0046] The charging load interface conversion unit is used to output electrical energy from the common DC bus to one or more charging loads, and adjust the output power of each charging load according to the voltage command, current command, or power command issued by the centralized controller; the total output power on the charging side... satisfy:

[0047] ,

[0048] Where m is the number of charging terminals. The output power of the k-th charging terminal;

[0049] The charging load interface conversion unit is also used to dynamically allocate the charging power of each charging terminal when multiple charging terminals are connected in parallel, so as to achieve coordinated power supply of multiple charging terminals, bus power balance and peak shaving and valley filling control.

[0050] Each of the dual active bridge isolation submodules includes a high-voltage side bridge arm, a low-voltage side bridge arm, a high-frequency isolation transformer, and a series inductor; wherein the DC side of the high-voltage side bridge arm is connected in parallel to a common DC bus, and the AC side is connected to the primary side of the high-frequency isolation transformer via a series inductor; the AC side of the low-voltage side bridge arm is connected to the secondary side of the high-frequency isolation transformer, and the DC side is connected to the energy storage battery interface module via a corresponding controlled switching unit.

[0051] The centralized controller determines the set of target dual active bridge isolation submodules to be put into operation and their corresponding controlled switching states based on the target power of the energy storage side, the operating status of the common DC bus and the operating status of each dual active bridge isolation submodule. It also generates phase shift control quantities for the dual active bridge isolation submodules to be put into operation, so as to realize the reconfigurable parallel operation of the high-frequency isolation interconnection router.

[0052] The Battery Management System (BMS) calculates the corresponding routeability evaluation parameters (RPW) for each battery cluster based on its voltage, current, temperature, state of charge, and state of health. Based on these RPW parameters, each battery cluster is divided into permitted routing zones, power-limited routing zones, and prohibited routing zones. The routeability evaluation parameters for the i-th battery cluster are... Represented as:

[0053] ,

[0054] in, , , and These are the weighting coefficients, and they satisfy: α+β+γ+δ=1; , , and These are normalized evaluation quantities for the state of charge, state of health, temperature state, and internal resistance state, respectively.

[0055] The centralized controller determines the target battery cluster set based on the partition to which each battery cluster belongs, wherein: for battery clusters in the allowed access routing zone, they are allowed to participate in the target power allocation of the current cycle; for battery clusters in the limited power access routing zone, charging and discharging power is allocated according to a preset limit; for battery clusters in the prohibited access routing zone, the corresponding energy storage battery interface module is controlled to perform exit routing control.

[0056] The centralized controller further determines the target dual active bridge isolation submodule set and its controlled switching state that match the target battery cluster set based on the power allocation result corresponding to the target battery cluster set, so that the battery cluster activation state is synchronized with the activation state of the high-frequency isolation interconnection router.

[0057] The centralized controller adopts a hierarchical predictive control strategy, including an upper-level energy scheduling layer, a middle-level routing decision layer, and a lower-level execution control layer.

[0058] The upper energy dispatch layer generates target power commands for the energy storage side based on photovoltaic output, charging load demand, grid constraints, energy storage status and common DC bus status.

[0059] The middle-layer routing decision layer determines the target battery cluster set, the target dual active bridge isolation submodule set, the power allocation ratio of each battery cluster, and the corresponding controlled switching state based on the routable evaluation parameter RPW of each battery cluster, the operating status of each dual active bridge isolation submodule, and the common DC bus voltage deviation.

[0060] The underlying execution control layer generates phase shift control quantities for the target dual active bridge isolation submodule that is put into operation. During the phase shift control quantity solution process, it simultaneously constrains the power tracking error of the energy storage side, the common DC bus voltage deviation, the current deviation of the parallel submodule, and the switching change between adjacent control cycles, so as to achieve bus voltage stabilization, module current sharing, and smooth switching.

[0061] The present invention also provides a control method for the system, comprising the following steps:

[0062] Step S1: Collect the output power of the photovoltaic power generation module, the voltage of the common DC bus, the grid operation status, the charging load demand information, the operation status of each dual active bridge isolation submodule, and the voltage, current, temperature, state of charge and health status information of each battery cluster.

[0063] Step S2: The Battery Management System (BMS) calculates the routable evaluation parameter RPW corresponding to each battery cluster based on the status information of each battery cluster, and determines the routing permission level of each battery cluster based on the routable evaluation parameter RPW. Corresponding route allowance level L i Represented as:

[0064] ,

[0065] Where θ1 and θ2 are preset thresholds, and θ1 < θ2; when L i When L = 0, the corresponding battery cluster is prohibited from being assigned to the current route; when L i When L = 1, the corresponding battery cluster participates in the current routing in a power-limited manner; when L iWhen =2, the corresponding battery cluster participates in the current route first; target battery cluster set Represented as: ;

[0066] Step S3: The central controller generates the target power command for the energy storage side based on the photovoltaic output, charging load demand, grid constraints, common DC bus status, and energy storage side status.

[0067] Step S4: The centralized controller determines the target battery cluster set, the target power allocation ratio of each target battery cluster, the target dual active bridge isolation submodule set, and the corresponding controlled switching status based on the routing allowance level of each battery cluster, the target power command on the energy storage side, the operating status of the common DC bus, and the operating status of each dual active bridge isolation submodule; the target power allocation ratio of the i-th battery cluster... Represented as:

[0068] ,

[0069] Target power command for the i-th battery cluster for:

[0070] ,

[0071] The switching state variable of the j-th dual active bridge isolation submodule for:

[0072] ,

[0073] Target Dual Active Bridge Isolation Submodule Set Represented as: ;

[0074] Step S5: The centralized controller solves the phase shift control quantity for the target dual active bridge isolation submodule that is put into operation, and generates corresponding execution control quantities for the photovoltaic interface conversion unit, grid interface conversion unit, charging load interface conversion unit and energy storage battery interface module, so as to realize power tracking on the energy storage side, voltage regulation of the common DC bus and coordinated operation of parallel submodules.

[0075] Under single-phase shift control mode, the average transmission power of the j-th dual active bridge isolation submodule Represented as:

[0076] ,

[0077] in, This is the high-voltage side voltage. This is the low-voltage side voltage. For the turns ratio of a high-frequency isolation transformer, For series inductance or equivalent leakage inductance, The switching angular frequency, Normalized phase shift ratio;

[0078] The total transmission power on the energy storage side meets the following requirements:

[0079] ,

[0080] Where M represents the total number of dual active bridge isolation submodules;

[0081] Centralized controller switches state variables and phase shift control quantity Perform joint optimization to solve the problem. The joint optimization objective function J is expressed as:

[0082] ,

[0083] in, For the loss of the j-th dual active bridge isolation submodule, Let j be the current of the j-th dual active bridge isolation submodule. Average current of the sub-modules put into operation This represents the switching state of the j-th dual active bridge isolation submodule in the previous control cycle. For the target power of the energy storage side, This represents the actual power on the energy storage side. The reference voltage for the common DC bus. The actual voltage of the common DC bus is ω1, ω2, ω3, ω4, and ω5, which are weighting coefficients.

[0084] Step S6, when the routable evaluation parameters of any battery cluster satisfy... <θ1, or when any dual active bridge isolation submodule is in an abnormal state, the central controller re-determines the target battery cluster set, the target power allocation ratio of each target battery cluster, the target dual active bridge isolation submodule set, the corresponding controlled switching state and phase shift control quantity, so that the remaining available battery clusters and normal dual active bridge isolation submodules can resume taking on the target power of the energy storage side.

[0085] The present invention also provides an electronic device, including a processor and a memory, the memory storing program code that, when executed by the processor, causes the processor to perform the steps of the method.

[0086] The present invention also provides a storage medium storing a computer program or instructions that, when the computer program or instructions are run on a computer, execute the steps of the method described.

[0087] Beneficial effects: 1. This invention achieves unified bidirectional energy transmission, electrical isolation, and voltage matching by setting a high-frequency isolated interconnect router as the core energy routing unit between the common DC bus and the energy storage side. Compared with existing non-isolated energy storage access methods, this invention can improve the system's isolation security, fault suppression capability, and adaptability between different voltage levels; compared with power frequency isolation schemes, it has the advantages of high power density, small size, and high efficiency, and is therefore more suitable for the integrated application of intelligent photovoltaic energy storage and charging systems.

[0088] 2. This invention, based on the power balance relationship of the common DC bus and combined with the rapid bidirectional adjustment capability of the bus support capacitor and the high-frequency isolated interconnection router, can effectively suppress bus voltage disturbances caused by photovoltaic power output fluctuations and sudden changes in charging load. Simultaneously, the energy storage side can dynamically compensate based on the real-time power difference of the system, thereby enhancing the voltage stabilization capability of the common DC bus and improving the dynamic response performance and overall operational stability of the system in multi-port coupled operation scenarios.

[0089] 3. This invention proposes a hierarchical model predictive control strategy, HIR-HMPC, which achieves multi-objective coordinated optimization through upper-level energy management optimization, mid-level rolling power allocation, and lower-level phase-shift predictive control. The upper-level objective function, while maintaining bus stability and energy storage safety, simultaneously reduces grid switching power, lowers curtailed photovoltaic power, and maintains a reasonable state of charge for energy storage. The lower-level control further considers energy storage power tracking, bus voltage stability, and device current stress suppression. Therefore, this invention possesses both global optimization capabilities and rapid execution capabilities, further improving photovoltaic absorption rate, energy storage utilization rate, and charging reliability. Attached Figure Description

[0090] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0091] Figure 1 This is a schematic diagram of the structure of the present invention.

[0092] Figure 2 This is a physical illustration of the present invention.

[0093] Figure 3 This is a schematic diagram of the improved algorithm of the present invention.

[0094] Figure 4 This is a comparison chart of the improvement rates of the system's main performance indicators.

[0095] Figure 5 This is a radar comparison chart of system security indicators.

[0096] Figure 6 This is a comparison chart of the dynamic response of bus voltage under sudden load changes. Detailed Implementation

[0097] like Figure 1 , Figure 2 As shown, this embodiment of the invention provides an intelligent photovoltaic-storage-charging system based on a high-frequency isolated interconnect router, including a photovoltaic power generation module 1, a photovoltaic interface conversion unit module 2, a common DC bus, a grid interface conversion unit module 3, a charging load interface conversion unit module 8, a high-frequency isolated interconnect router module 5, an energy storage battery interface module 7, an energy storage battery pack module 6, a battery management system (BMS), and a centralized controller cabinet module 4. The system uses the common DC bus as the energy collection and distribution center, the high-frequency isolated interconnect router as the bidirectional energy regulation and electrical isolation hub on the energy storage side, and achieves coordinated operation between the photovoltaic side, the grid side, the energy storage side, and the charging side through a centralized controller.

[0098] Photovoltaic power generation module and photovoltaic interface conversion unit: The photovoltaic power generation module is used to convert solar energy into DC power, and its output voltage and output current are denoted as follows: and Then the photovoltaic output power is:

[0099] ,

[0100] in, Indicates the output power of the photovoltaic power generation module. Indicates the output voltage of the photovoltaic system. This represents the photovoltaic output current. The formula shows that the output power of the photovoltaic side is determined by both its port voltage and port current.

[0101] To improve photovoltaic utilization, this invention preferably operates the photovoltaic power generation module near its maximum power point. The maximum power point of the photovoltaic system satisfies the following:

[0102] ,

[0103] This indicates that the photovoltaic module is at its maximum power point when the first derivative of the photovoltaic output power with respect to the photovoltaic output voltage is zero. This condition can be used as a criterion for photovoltaic maximum power point tracking control.

[0104] Since photovoltaic (PV) power generation modules cannot be directly and stably connected to a common DC bus, a PV interface converter unit is installed between the PV power generation module and the common DC bus to achieve voltage matching and power regulation. In a preferred embodiment, the PV interface converter unit adopts a boost DC / DC converter structure, with its input connected to the PV power generation module and its output connected to the common DC bus. When a Boost converter is used, its ideal steady-state voltage relationship is:

[0105] ,

[0106] in, Indicates the common DC bus voltage. This represents the duty cycle of the photovoltaic interface conversion unit. The formula illustrates that by adjusting the duty cycle... This can change the relationship between the photovoltaic output voltage and the bus voltage, thereby adjusting the photovoltaic operating point. The centralized controller adjusts the photovoltaic power reference value. Or adjust the duty cycle based on the maximum power point tracking result. To ensure that photovoltaic output meets the following requirements: Tend to P pv ∗ Among them, P pv ∗ This represents the target output power on the photovoltaic side. It indicates that the control objective of the photovoltaic interface conversion unit is to gradually bring the actual photovoltaic output power closer to the target power.

[0107] The common DC bus is the core energy collection node of this invention's system, connecting the photovoltaic interface conversion unit, the grid interface conversion unit, the charging interface conversion unit, and the high-voltage side of the high-frequency isolated interconnect router. The common DC bus is used to collect, buffer, and distribute multi-port electrical energy within the system.

[0108] The common DC bus is equipped with a bus support capacitor C. dc The bus voltage is denoted as V. dc Based on capacitance relationships, the bus capacitor current... for:

[0109] ,

[0110] When the bus voltage changes, the bus capacitor absorbs or releases current to buffer energy. According to the system energy balance, the following power relationship applies to the bus side:

[0111] ,

[0112] in Indicates the output power of the photovoltaic side. Indicates the power exchange capacity on the grid side. Indicates the total power on the charging side. This represents the change in energy storage at the bus capacitor. This formula reflects the dynamic power balance at the bus: when the input power is greater than the output power, the bus voltage rises; when the input power is less than the output power, the bus voltage falls.

[0113] The grid interface converter unit connects to the common DC bus to enable bidirectional power exchange between the external AC grid and the system's DC bus. When the system's internal photovoltaic and energy storage power is insufficient, the grid interface converter unit draws power from the grid to provide supplementary power to the bus and charging loads; when there is excess energy within the system, the grid interface converter unit can feed the surplus energy back to the AC grid. The grid-side exchange power is expressed as:

[0114] ,

[0115] Among them, u a ,u b ,u c For the three-phase power grid voltage, i a i b i c For the three-phase grid-connected current, P grid This refers to the power exchanged between the system and the power grid. The charging load interface conversion unit is used to output electrical energy from the common DC bus to one or more charging terminals. When there are multiple charging terminals in the system, the total output power on the charging side is... satisfy:

[0116] ,

[0117] Where m is the number of charging terminals. The output power is for the k-th charging terminal. Therefore, the system needs to coordinate the fluctuations on the photovoltaic side, the grid-side switching, and the load changes on the charging side simultaneously during operation.

[0118] To improve the isolation security, power regulation flexibility, and fault tolerance of energy storage-side access, the high-frequency isolation interconnect router in this invention is not a single dual active bridge converter, but includes at least two parallel dual active bridge isolation submodules and their corresponding controlled switching units. The switching state variable of the i-th dual active bridge isolation submodule is defined as:

[0119] ,

[0120] in, This indicates that the i-th dual active bridge isolation submodule is now operational. This indicates that the i-th dual active bridge isolation submodule has exited operation. Therefore, the total transmission power of the modular high-frequency isolation interconnect router is expressed as:

[0121] ,

[0122] in, This represents the transmission power borne by the i-th dual active bridge isolation submodule. This formula demonstrates that the total transmission power on the energy storage side is no longer borne by a single power channel, but rather shared as needed by multiple reconfigurable submodules.

[0123] Under single-phase shift control, the average transmission power of the i-th dual active bridge isolation submodule is expressed as:

[0124] ,

[0125] in, The voltage on the high-voltage side of the i-th submodule is... This is the low-voltage side voltage. For the turns ratio of a high-frequency transformer, For switching frequency, For series inductance or equivalent leakage inductance, This represents the normalized phase shift ratio. To enable multiple parallel submodules to operate stably and collaboratively under conditions of parameter dispersion, thermal state differences, and aging differences, the following definition is further defined:

[0126] ,

[0127] in, For the global fundamental phase shift, The phase shift is adjusted for the i-th submodule. Therefore, each submodule does not use a completely identical driving phase shift angle, but rather makes differentiated adjustments based on its own state to achieve power coordination and module current sharing.

[0128] To achieve the determination of the target submodule set, module current sharing, loss suppression, and switching jitter suppression, the centralized controller solves the following joint optimization objective function:

[0129] ,

[0130] in, For the loss of the i-th submodule, Let i be the current of the i-th submodule. The average current of the sub-modules put into operation. This represents the switching state from the previous control cycle. The target power is the energy storage side. The above objective functions correspond to four types of control objectives: loss optimization, current sharing control, switching smoothing, and target power tracking, respectively. This enables the high-frequency isolated interconnect router to not only have bidirectional energy transmission capabilities, but also modular reconfiguration and fault tolerance capabilities.

[0131] In addition to collecting data on voltage, current, temperature, state of charge, and health of each battery cluster, the Battery Management System (BMS) is also used to calculate the routing evaluation parameters for each battery cluster. The routable evaluation parameters for the i-th battery cluster are used to characterize its suitability for participating in energy routing, its power carrying capacity, and its thermal safety margin at the current moment. Represented as:

[0132] ,

[0133] in, , , and These are the weighting coefficients, and they satisfy: α+β+γ+δ=1; , , and These are normalized evaluation parameters for the state of charge, health, temperature, and internal resistance, respectively. Through this construction, the BMS output forms comprehensive evaluation parameters that can directly participate in subsequent routing decisions and power allocation.

[0134] The centralized controller is based on each battery cluster. Determine the corresponding route allowance level L i , is represented as:

[0135] ,

[0136] Where θ1 and θ2 are preset thresholds, and θ1 < θ2. When L i When L = 0, the corresponding battery cluster is prohibited from being assigned to the current route; when L i When L = 1, the corresponding battery cluster participates in the current routing in a power-limited manner; when L i When the value is 2, the corresponding battery cluster will participate in the current route first.

[0137] Therefore, the target battery cluster set Represented as: By mapping RPW to routing permission levels, battery cluster state awareness results can be directly applied to target battery cluster selection and subsequent power allocation.

[0138] The centralized controller generates the target power command on the energy storage side, based on the power requirements of each battery cluster within the target battery cluster set. and routing permission level L i Determine the target power allocation ratio for each battery cluster. , is represented as:

[0139] ,

[0140] Where N is the total number of battery clusters, and satisfies ; Target power command for the i-th battery cluster for:

[0141] ,

[0142] thus, The higher the battery cluster and the higher the routing permission level, the higher the proportion of target power allocated to it in the current control cycle, thereby realizing dynamic energy routing based on battery health status and power capability.

[0143] The switching state variable of the j-th dual active bridge isolation submodule for:

[0144] ,

[0145] Target Dual Active Bridge Isolation Submodule Set Represented as: .

[0146] The centralized controller is based on the target battery cluster set Energy storage side target power command Based on the common DC bus voltage deviation and the operating status of each dual active bridge isolation submodule, the target set of dual active bridge isolation submodules is determined. And the corresponding controlled switching state, thereby realizing the energy storage route reconfiguration that links battery cluster selection with submodule selection.

[0147] Under single-phase shift control mode, the average transmission power of the j-th dual active bridge isolation submodule Represented as:

[0148] ,

[0149] in, This is the high-voltage side voltage. This is the low-voltage side voltage. For the turns ratio of a high-frequency isolation transformer, For series inductance or equivalent leakage inductance, The switching angular frequency, This is the normalized phase shift ratio.

[0150] The total transmission power on the energy storage side then satisfies:

[0151] ,

[0152] Where M represents the total number of dual active bridge isolation submodules. Therefore, the total transmission power on the energy storage side is shared as needed by multiple reconfigurable submodules.

[0153] To achieve the following: determination of the target dual active bridge isolation submodule set, current sharing of parallel submodules, power tracking on the energy storage side, and voltage stabilization of the common DC bus, the centralized controller controls the switching state variables. and phase shift control quantity Perform joint optimization to solve the problem. The joint optimization objective function J is expressed as:

[0154] ,

[0155] in, For the loss of the j-th dual active bridge isolation submodule, Let j be the current of the j-th dual active bridge isolation submodule. Average current of the sub-modules put into operation This represents the switching state of the j-th dual active bridge isolation submodule in the previous control cycle. For the target power of the energy storage side, This represents the actual power on the energy storage side. The reference voltage for the common DC bus. ω1, ω2, ω3, ω4, and ω5 are the actual voltage of the common DC bus, and ω1, ω2, ω3, ω4, and ω5 are weighting coefficients.

[0156] The first item is used to suppress the operating loss of the sub-module, the second item is used to reduce the current deviation of the parallel sub-modules to achieve module current sharing, the third item is used to suppress the frequent switching changes between adjacent control cycles to achieve smooth switching, the fourth item is used to ensure power tracking on the energy storage side, and the fifth item is used to maintain the stability of the common DC bus voltage.

[0157] When any battery cluster satisfies If θ1 is less than θ1, or if any dual active bridge isolation submodule is in an abnormal state, the central controller will remove the corresponding battery cluster or dual active bridge isolation submodule from the current route and redetermine the target battery cluster set. Target Dual Active Bridge Isolation Submodule Set Target power allocation ratio for each battery cluster and phase shift control quantities of each dual active bridge isolation submodule This allows the remaining available battery clusters and normal dual active bridge isolation submodules to resume bearing the target power of the energy storage side, thereby maintaining the voltage regulation of the common DC bus and the continuous power supply of the energy storage side.

[0158] In summary, this invention, by introducing a modular reconfigurable high-frequency isolated interconnect router, a battery state-aware routing mechanism based on RPW, and a matching hierarchical predictive control strategy under a common DC bus architecture, achieves coordinated energy management among the photovoltaic side, grid side, energy storage side, and charging side, thereby improving the system's isolation security, dynamic response performance, power allocation flexibility, and overall operational reliability.

[0159] like Figure 3 As shown, Figure 3This is a schematic diagram of the improved algorithm of the present invention. The centralized controller adopts a hierarchical predictive control strategy to perform rolling optimization control on the system. Its control process includes: first, collecting system status information; then, the battery management system (BMS) calculates and updates the routable evaluation parameter RPW of each battery cluster; based on this, the upper-level control performs energy optimization, combining photovoltaic output, charging load demand, grid constraints, energy storage status, and common DC bus status to generate a target power command for the energy storage side; the middle-level control performs rolling power allocation, determining the target battery cluster set and the target dual active bridge isolation module based on the routable evaluation parameter RPW of each battery cluster, the operating status of each dual active bridge isolation submodule, and the common DC bus voltage deviation. The system sets up ion modules, sets the power allocation ratio of each battery cluster, and determines the corresponding controlled switching status. Then, it judges whether the routable evaluation parameter RPW of each battery cluster and the submodule status meet the commissioning conditions. If the commissioning conditions are not met, it performs derating, shielding, or reconfiguration on the corresponding battery cluster or submodule. When the commissioning conditions are met, the underlying control performs phase shift prediction and commissioning coordination to generate phase shift control quantities for each operational dual active bridge isolated submodule and execution control quantities for each interface conversion unit. Finally, it performs commissioning and route reconfiguration and enters the next sampling cycle to achieve common DC bus voltage regulation, energy storage side power tracking, parallel submodule current sharing, and system fault-tolerant operation.

[0160] like Figure 4 The figure shown is a comparison of the improvement of the present invention's technology compared to existing systems. Figure 4 As can be seen, this invention demonstrates varying degrees of optimization across multiple performance indicators, with the largest reduction in steady-state bus disturbance reaching 17.99%, indicating that the invention is most effective in improving the stability of the common DC bus. Simultaneously, the improvements in root mean square error, fluctuation, and dynamic power deviation of the bus reach 8.50%, 7.20%, and 6.20%, respectively, indicating enhancements in control accuracy, output stability, and dynamic coordination capabilities. While the photovoltaic absorption rate and efficiency improvement rate are relatively small, they still demonstrate that this invention has a certain optimization effect on new energy utilization and energy conversion.

[0161] like Figure 5 The image shown is a radar comparison chart of system security indicators. Figure 5As can be seen, compared with existing systems, this invention demonstrates superior performance in multiple safety indicators, including electrical isolation capability, fault suppression capability, bus stability, voltage matching capability, and system reliability, with a larger overall radar chart coverage. The main reason for this is that this invention employs a high-frequency isolated interconnect router as the core energy routing unit between the bus side and the energy storage side. It achieves unified bidirectional energy transmission and electrical isolation through a dual active bridge and high-frequency transformer structure. Simultaneously, combined with real-time monitoring and coordinated control by the battery management system and centralized controller, it effectively improves system operational safety, fault protection capability, and overall reliability.

[0162] like Figure 6 The figure shown is a comparison of the dynamic response of the bus voltage under sudden load changes. Figure 6 It is evident that when the charging load undergoes a sudden change, the bus voltage fluctuation amplitude of the system of this invention is significantly smaller, and the time to recover to a stable state is shorter, indicating that the present invention has superior dynamic response capability and bus voltage stabilization capability. During sudden increases or decreases in load, the present invention can rapidly redistribute power between the energy storage side, the grid side, and the photovoltaic side by relying on the buffering effect of the common DC bus support capacitor, the rapid bidirectional adjustment capability of the high-frequency isolated interconnect router, and the real-time correction capability of the hierarchical model predictive control strategy. This suppresses voltage overshoot and oscillation, enhances the system's anti-disturbance capability, and ensures stable power supply to the charging load.

[0163] This invention provides an intelligent optical energy storage and charging system and method based on a high-frequency isolated interconnect router. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of the invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. An intelligent optical energy storage and charging system based on a high-frequency isolated interconnect router, characterized in that, It includes a photovoltaic power generation module, a photovoltaic interface conversion unit, a common DC bus, a grid interface conversion unit, a charging load interface conversion unit, a high-frequency isolated interconnect router, an energy storage battery interface module, an energy storage battery pack, a battery status acquisition, battery health assessment and routing participation qualification determination, and a centralized controller; The photovoltaic power generation module is connected to the common DC bus via a photovoltaic interface conversion unit. The grid interface conversion unit and the charging load interface conversion unit are respectively connected to the common DC bus. The common DC bus is connected to the energy storage battery interface module via a high-frequency isolated interconnection router. The energy storage battery interface module is connected to the energy storage battery pack. The high-frequency isolated interconnect router includes two or more dual active bridge isolation sub-modules connected in parallel, and a controlled switching unit corresponding to each dual active bridge isolation sub-module. The high-voltage side of each dual active bridge isolation sub-module is connected in parallel to a common DC bus, and the low-voltage side is connected to the energy storage battery interface module through the corresponding controlled switching unit. The energy storage battery pack includes two or more battery clusters. The integrated battery management system (BMS) is used to collect the status information of each battery cluster and calculate the routable evaluation parameter (RPW) corresponding to each battery cluster. The routable evaluation parameter (RPW) is used to characterize the suitability of the corresponding battery cluster to participate in the current energy routing. The centralized controller is used to determine the target battery cluster set, the target dual active bridge isolation submodule set, and the corresponding controlled switching state based on the routable evaluation parameter RPW of each battery cluster, the target power of the energy storage side, the operating status of the common DC bus, and the operating status of each dual active bridge isolation submodule. It also generates the phase shift control quantity of the dual active bridge isolation submodules that are put into operation and the execution control quantity of each interface conversion unit to realize the reconfigurable high-frequency isolated energy routing between the common DC bus and the energy storage side and the adaptive charging and discharging of the energy storage side.

2. The system according to claim 1, characterized in that, The photovoltaic interface conversion unit is used to regulate the DC voltage and DC current output by the photovoltaic power generation module, and performs maximum power point tracking control or power limiting control under the control of the centralized controller, so that the photovoltaic power generation module operates in the maximum power output state or the controlled output state; the photovoltaic output power is: ， in, Indicates the output power of the photovoltaic power generation module. Indicates the output voltage of the photovoltaic system. Indicates the photovoltaic output current; The maximum power point of photovoltaic power satisfies: ， The photovoltaic interface conversion unit injects the power output from the photovoltaic power generation module into the common DC bus. When the photovoltaic power generation is greater than the power demand of the charging load, the centralized controller controls the system to prioritize power supply from the photovoltaic power generation module to the charging load, and transmits the remaining power to the energy storage battery pack for charging via the common DC bus, high-frequency isolated interconnection router, and energy storage battery interface module. When the photovoltaic power generation is less than or equal to the power demand of the charging load, the centralized controller controls the energy storage side and the grid side to compensate for the power deficit to the common DC bus. When the photovoltaic interface conversion unit adopts a boost converter, the ideal steady-state voltage relationship is: ， in, Indicates the common DC bus voltage. Indicates the duty cycle of the photovoltaic interface conversion unit; The centralized controller is based on the photovoltaic power reference value. Or adjust the duty cycle based on the maximum power point tracking result. To ensure that the photovoltaic output meets the following requirements: photovoltaic output power Approaching P pv ∗ , where P pv ∗ This indicates the target output power on the photovoltaic side.

3. The system according to claim 2, characterized in that, The common DC bus is equipped with a bus support capacitor C. dc It is used to buffer energy and support voltage for power fluctuations between the photovoltaic side, grid side, energy storage side, and charging side; bus capacitor current. for: ， Where d represents the derivative and t represents time; The following power relationship is satisfied on the bus side: ， in Indicates the output power of the photovoltaic side. Indicates the power exchange capacity on the grid side. Indicates the total power on the charging side. This represents the change in energy storage of the bus capacitor; The centralized controller coordinates and controls each port based on the power balance relationship of the common DC bus. The power balance relationship includes the sum of the power input from the photovoltaic side to the common DC bus, the power exchanged between the grid side and the common DC bus, and the power exchanged between the energy storage side and the common DC bus, which is equal to the sum of the power output from the charging side to the common DC bus, the system loss power, and the power corresponding to the change in energy storage on the common DC bus. Under steady-state conditions, the centralized controller adjusts the control quantities of the photovoltaic interface conversion unit, the grid interface conversion unit, the charging interface conversion unit, and the high-frequency isolated interconnection router to keep the input power and output power of the common DC bus balanced and stabilize the voltage of the common DC bus near a preset reference value. Define the switching state variable of the i-th dual active bridge isolation submodule. for: ， in, This indicates that the i-th dual active bridge isolation submodule is now operational. This indicates that the i-th dual active bridge isolation submodule has exited operation; N represents the total number of dual active bridge isolation submodules. The total transmission power of a modular high-frequency isolated interconnect router is expressed as: ， in, The transmission power undertaken by the i-th dual active bridge isolation submodule; Under single-phase shift control, the average transmission power of the i-th dual active bridge isolation submodule is expressed as: ， in, The voltage on the high-voltage side of the i-th submodule is... For the low-voltage side voltage of the i-th submodule, Let be the turns ratio of the i-th high-frequency isolation transformer. Let i be the switching frequency of the i-th submodule. Let i be the series inductance or equivalent leakage inductance of the i-th submodule. The normalized phase shift ratio of the i-th submodule is expressed as: ， in, For the global fundamental phase shift, Correct the phase shift for the i-th submodule. The centralized controller solves for the following joint optimization objective function: ， in, For the loss of the i-th submodule, Let i be the current of the i-th submodule. The average current of the sub-modules put into operation. For the target power of the energy storage side, To optimize the weighting coefficients for loss, These are the flow control weighting coefficients. The switching smoothing weighting coefficients are used. For power tracking weighting coefficients, This is the switching state variable of the i-th dual active bridge isolation submodule in the previous control cycle.

4. The system according to claim 3, characterized in that, The grid interface conversion unit is used to realize bidirectional power exchange between the system and the external AC grid. When the power inside the system is insufficient, it absorbs electrical energy from the external grid and injects it into the common DC bus. When the power inside the system is surplus, it feeds the electrical energy from the common DC bus back to the external grid. The grid-side exchange power is expressed as: ， Among them, u a ,u b ,u c For the three-phase power grid voltage, i a i b i c For the three-phase grid-connected current, P grid This refers to the power exchanged between the system and the power grid. The charging load interface conversion unit is used to output electrical energy from the common DC bus to one or more charging loads, and adjust the output power of each charging load according to the voltage command, current command, or power command issued by the centralized controller; the total output power on the charging side... satisfy: ， Where m is the number of charging terminals. The output power of the k-th charging terminal; The charging load interface conversion unit is also used to dynamically allocate the charging power of each charging terminal when multiple charging terminals are connected in parallel, so as to achieve coordinated power supply of multiple charging terminals, bus power balance and peak shaving and valley filling control.

5. The system according to claim 4, characterized in that, Each of the dual active bridge isolation submodules includes a high-voltage side bridge arm, a low-voltage side bridge arm, a high-frequency isolation transformer, and a series inductor; wherein the DC side of the high-voltage side bridge arm is connected in parallel to a common DC bus, and the AC side is connected to the primary side of the high-frequency isolation transformer via a series inductor; the AC side of the low-voltage side bridge arm is connected to the secondary side of the high-frequency isolation transformer, and the DC side is connected to the energy storage battery interface module via a corresponding controlled switching unit. The centralized controller determines the set of target dual active bridge isolation submodules to be put into operation and their corresponding controlled switching states based on the target power of the energy storage side, the operating status of the common DC bus and the operating status of each dual active bridge isolation submodule. It also generates phase shift control quantities for the dual active bridge isolation submodules to be put into operation, so as to realize the reconfigurable parallel operation of the high-frequency isolation interconnection router.

6. The system according to claim 5, characterized in that, The Battery Management System (BMS) calculates the corresponding routeability evaluation parameters (RPW) for each battery cluster based on its voltage, current, temperature, state of charge, and state of health. Based on these RPW parameters, each battery cluster is divided into permitted routing zones, power-limited routing zones, and prohibited routing zones. The routeability evaluation parameters for the i-th battery cluster are... Represented as: ， in, , , and These are the weighting coefficients, and they satisfy: α+β+γ+δ=1; , , and These are normalized evaluation quantities for the state of charge, state of health, temperature state, and internal resistance state, respectively. The centralized controller determines the target battery cluster set based on the partition to which each battery cluster belongs, wherein: for battery clusters in the allowed access routing zone, they are allowed to participate in the target power allocation of the current cycle; for battery clusters in the limited power access routing zone, charging and discharging power is allocated according to a preset limit; for battery clusters in the prohibited access routing zone, the corresponding energy storage battery interface module is controlled to perform exit routing control. The centralized controller further determines the target dual active bridge isolation submodule set and its controlled switching state that match the target battery cluster set based on the power allocation result corresponding to the target battery cluster set, so that the battery cluster activation state is synchronized with the activation state of the high-frequency isolation interconnection router.

7. The system according to claim 6, characterized in that, The centralized controller adopts a hierarchical predictive control strategy, including an upper-level energy scheduling layer, a middle-level routing decision layer, and a lower-level execution control layer. The upper energy dispatch layer generates target power commands for the energy storage side based on photovoltaic output, charging load demand, grid constraints, energy storage status and common DC bus status. The middle-layer routing decision layer determines the target battery cluster set, the target dual active bridge isolation submodule set, the power allocation ratio of each battery cluster, and the corresponding controlled switching state based on the routable evaluation parameter RPW of each battery cluster, the operating status of each dual active bridge isolation submodule, and the common DC bus voltage deviation. The underlying execution control layer generates phase shift control quantities for the target dual active bridge isolation submodule that is put into operation. During the phase shift control quantity solution process, it simultaneously constrains the power tracking error of the energy storage side, the common DC bus voltage deviation, the current deviation of the parallel submodule, and the switching change between adjacent control cycles, so as to achieve bus voltage stabilization, module current sharing, and smooth switching.

8. A control method for the system as described in any one of claims 1 to 7, characterized in that, Includes the following steps: Step S1: Collect the output power of the photovoltaic power generation module, the voltage of the common DC bus, the grid operation status, the charging load demand information, the operation status of each dual active bridge isolation submodule, and the voltage, current, temperature, state of charge and health status information of each battery cluster. Step S2: The Battery Management System (BMS) calculates the routable evaluation parameter RPW corresponding to each battery cluster based on the status information of each battery cluster, and determines the routing permission level of each battery cluster based on the routable evaluation parameter RPW. Corresponding route allowance level L i Represented as: ， Where θ1 and θ2 are preset thresholds, and θ1 < θ2; when L i When L = 0, the corresponding battery cluster is prohibited from being assigned to the current route; when L i When L = 1, the corresponding battery cluster participates in the current routing in a power-limited manner; when L i When =2, the corresponding battery cluster participates in the current route first; target battery cluster set Represented as: ; Step S3: The central controller generates the target power command for the energy storage side based on the photovoltaic output, charging load demand, grid constraints, common DC bus status, and energy storage side status. Step S4: The centralized controller determines the target battery cluster set, the target power allocation ratio of each target battery cluster, the target dual active bridge isolation submodule set, and the corresponding controlled switching status based on the routing allowance level of each battery cluster, the target power command on the energy storage side, the operating status of the common DC bus, and the operating status of each dual active bridge isolation submodule; the target power allocation ratio of the i-th battery cluster... Represented as: ， Target power command for the i-th battery cluster for: ， The switching state variable of the j-th dual active bridge isolation submodule for: ， Target Dual Active Bridge Isolation Submodule Set Represented as: ; Step S5: The centralized controller solves the phase shift control quantity for the target dual active bridge isolation submodule that is put into operation, and generates corresponding execution control quantities for the photovoltaic interface conversion unit, grid interface conversion unit, charging load interface conversion unit and energy storage battery interface module, so as to realize power tracking on the energy storage side, voltage regulation of the common DC bus and coordinated operation of parallel submodules. Under single-phase shift control mode, the average transmission power of the j-th dual active bridge isolation submodule Represented as: ， in, This is the high-voltage side voltage. This is the low-voltage side voltage. For the turns ratio of a high-frequency isolation transformer, For series inductance or equivalent leakage inductance, The switching angular frequency, Normalized phase shift ratio; The total transmission power on the energy storage side meets the following requirements: ， Where M represents the total number of dual active bridge isolation submodules; Centralized controller switches state variables and phase shift control quantity Perform joint optimization to solve; the joint optimization objective function J is expressed as: ， in, For the loss of the j-th dual active bridge isolation submodule, Let j be the current of the j-th dual active bridge isolation submodule. Average current of the sub-modules put into operation This represents the switching state of the j-th dual active bridge isolation submodule in the previous control cycle. For the target power of the energy storage side, This represents the actual power on the energy storage side. The reference voltage for the common DC bus. The actual voltage of the common DC bus is ω1, ω2, ω3, ω4, and ω5, which are weighting coefficients. Step S6, when the routable evaluation parameters of any battery cluster satisfy... <θ1, or when any dual active bridge isolation submodule is in an abnormal state, the central controller re-determines the target battery cluster set, the target power allocation ratio of each target battery cluster, the target dual active bridge isolation submodule set, the corresponding controlled switching state and phase shift control quantity, so that the remaining available battery clusters and normal dual active bridge isolation submodules can resume taking on the target power of the energy storage side.

9. An electronic device, characterized in that, It includes a processor and a memory, the memory storing program code that, when executed by the processor, causes the processor to perform the steps of the method as described in claim 8.

10. A storage medium, characterized in that, It stores a computer program or instructions that, when run on a computer, perform the steps of the method as described in claim 8.

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