Control method and device of optical storage direct flexible system and storage medium

Abstract

The invention provides a control method and device of an optical storage direct flexible system and a storage medium, and relates to the technical field of electric power. The method comprises the following steps: acquiring operation state information of the optical storage direct-current flexible system, wherein the operation state information is used for indicating that the optical storage direct-current flexible system is in a grid-connected or off-grid state; under the condition that the optical storage direct current flexible system is in a grid-connected state, determining a current grid-connected control mode of the optical storage direct current flexible system according to multiple items of generated power of a photovoltaic power generation module, required power of a load, residual electric quantity of an energy storage module and electricity price information of a power grid; and based on the current grid-connected control mode, performing energy scheduling control on the optical storage direct flexible system. The control mode is determined by comprehensively considering the operation state information of the system, the power of each module in the system, the power grid electricity price information and other information, the energy scheduling requirement of the optical storage direct flexible system in the grid-connected and off-grid states can be met, especially the refined grid-connected energy scheduling requirement can be met, and the efficiency and scene applicability of energy scheduling are improved.

Description

Technical Field

[0001] The present disclosure relates to the field of electric power technology, and in particular to a control method, device, and storage medium for a photovoltaic direct-flexible system. Background Art

[0002] "PV-storage-direct-flexible" combines photovoltaic power generation, energy storage, DC power distribution, and flexible power consumption. "PV" refers to distributed photovoltaic power generation systems, "storage" refers to energy storage systems, "DC" refers to DC power distribution systems, and "flexible" refers to flexible power consumption equipment.

[0003] The PV-storage direct-flexible energy station is a product based on PV-storage direct-flexible technology. It connects distributed photovoltaic power generation systems, energy storage systems, and electrical equipment (or loads) via a DC bus. Its energy management system enables flexible energy distribution, optimized scheduling, and efficient utilization. Simply put, the PV-storage direct-flexible energy station is an "energy steward" capable of intelligently regulating and efficiently utilizing energy.

[0004] In related technologies, the energy scheduling scheme of the photovoltaic storage direct-flexible system has shortcomings such as difficulty in balancing high efficiency and scenario applicability. Summary of the Invention

[0005] In order to solve the problem in the related art that the energy scheduling scheme of the photovoltaic storage direct-flexible system is difficult to balance high efficiency and scenario applicability, the present disclosure provides a control method, device and storage medium for the photovoltaic storage direct-flexible system.

[0006] According to the first aspect of the present disclosure, a control method for a photovoltaic, storage, direct and flexible system is proposed, comprising: obtaining operating status information of the photovoltaic, storage, direct and flexible system, wherein the operating status information is used to indicate whether the photovoltaic, storage, direct and flexible system is in a grid-connected state or an off-grid state; when the photovoltaic, storage, direct and flexible system is in a grid-connected state, determining a current grid-connected control mode of the photovoltaic, storage, direct and flexible system from a plurality of grid-connected control modes according to multiple items including the generated power of the photovoltaic power generation module in the photovoltaic, storage, direct and flexible system, the required power of the load, the remaining power of the energy storage module in the photovoltaic, storage, direct and flexible system, and the electricity price information of the power grid; and performing energy scheduling control on the photovoltaic, storage, direct and flexible system based on the current grid-connected control mode.

[0007] In some embodiments, determining the current grid-connected control mode of the photovoltaic, storage, direct-flexible system from a plurality of grid-connected control modes includes: determining that the current grid-connected control mode is the first grid-connected control mode when the generated power of the photovoltaic power generation module is greater than or equal to the required power of the load and the remaining power of the energy storage module is less than or equal to a first threshold; performing energy scheduling control on the photovoltaic, storage, direct-flexible system based on the current grid-connected control mode includes: controlling the photovoltaic power generation module to preferentially provide the generated power to the load when the current grid-connected control mode is the first grid-connected control mode; controlling the photovoltaic power generation module to charge the energy storage module based on the remaining part of the generated power after deducting the power provided to the load; and controlling the photovoltaic power generation module to provide the remaining power to the power grid when there is still residual power after deducting the power provided to the load and the energy storage module from the generated power.

[0008] In some embodiments, determining the current grid-connected control mode of the photovoltaic, storage, direct-flexible system from a plurality of grid-connected control modes includes: when the power generation power of the photovoltaic power generation module is less than the power demand of the load and the electricity price information of the grid indicates that the electricity price is at a low point, determining that the current grid-connected control mode is the second grid-connected control mode; performing energy dispatching control on the photovoltaic, storage, direct-flexible system based on the current grid-connected control mode includes: when the current grid-connected control mode is the second grid-connected control mode, controlling the photovoltaic power generation module to preferentially provide the power generation power to the load; controlling the grid to supply the part required by the load except the supply part of the photovoltaic power generation module; and controlling the grid to charge the energy storage module until the remaining power of the energy storage module is greater than or equal to the first threshold.

[0009] In some embodiments, determining the current grid-connected control mode of the photovoltaic, storage, direct-flexible system from a plurality of grid-connected control modes includes: when the generated power of the photovoltaic power generation module is less than the required power of the load, the electricity price information of the grid indicates that the electricity price is at a peak, and the remaining power of the energy storage module is less than a second threshold, determining that the current grid-connected control mode is a third grid-connected control mode, wherein the second threshold is less than the first threshold; performing energy dispatch control on the photovoltaic, storage, direct-flexible system based on the current grid-connected control mode includes: when the current grid-connected control mode is the third grid-connected control mode, controlling the photovoltaic power generation module to preferentially provide the generated power to the load; controlling the grid to supply the part required by the load except the part supplied by the photovoltaic power generation module; and controlling the grid to charge the energy storage module until the remaining power of the energy storage module is greater than or equal to the second threshold.

[0010] In some embodiments, determining the current grid-connected control mode of the photovoltaic, storage, direct-flexible system from a plurality of grid-connected control modes includes: when the electricity price information of the power grid indicates that the electricity price is at a peak and the remaining power of the energy storage module is greater than or equal to a second threshold, determining that the current grid-connected control mode is the fourth grid-connected control mode, wherein the second threshold is less than the first threshold; performing energy scheduling control on the photovoltaic, storage, direct-flexible system based on the current grid-connected control mode includes: when the current grid-connected control mode is the fourth grid-connected control mode, controlling the photovoltaic power generation module to preferentially charge the energy storage module; controlling the energy storage module to preferentially supply power to the load; when the energy storage module cannot meet the power required by the load, controlling the power grid to supply the part required by the load except the supply part of the energy storage module.

[0011] In some embodiments, controlling the energy storage module to preferentially supply power to the load includes: obtaining a current battery health of the energy storage module; determining, based on the battery health, a maximum allowable power supply current for the energy storage module to supply power to the load; and controlling the energy storage module to supply power to the load based on the maximum allowable power supply current.

[0012] In some embodiments, determining the maximum allowable supply current of the energy storage module to supply power to the load based on the battery health includes: when the battery health is greater than or equal to a first health threshold, setting the maximum allowable supply current to a first current threshold; when the battery health is greater than or equal to a second health threshold and less than the first health threshold, setting the maximum allowable supply current to a second current threshold, and the second current threshold is less than the first current threshold; when the battery health is less than the second health threshold, setting the maximum allowable supply current to a third current threshold, and the third current threshold is less than the second current threshold.

[0013] In some embodiments, determining the current grid-connected control mode of the photovoltaic, storage, direct-flexible system from a plurality of grid-connected control modes includes: when the generated power of the photovoltaic power generation module is greater than or equal to the required power of the load and the remaining power of the energy storage module is greater than a first threshold, determining that the current grid-connected control mode is the fifth grid-connected control mode; performing energy dispatch control on the photovoltaic, storage, direct-flexible system based on the current grid-connected control mode includes: when the current grid-connected control mode is the fifth grid-connected control mode, controlling the photovoltaic power generation module to preferentially provide the generated power to the load; controlling the photovoltaic power generation module to feed the power grid based on the remaining part of the generated power after excluding the part provided to the load; controlling the energy storage module to feed the power grid until the remaining power of the energy storage module is less than or equal to the first threshold; controlling the photovoltaic power generation module and the power grid to prohibit charging the energy storage module.

[0014] In some embodiments, the control method of the photovoltaic, storage, direct and flexible system also includes: when the photovoltaic, storage, direct and flexible system is in an off-grid state, determining the current off-grid control mode according to the power generation power of the photovoltaic power generation module in the photovoltaic, storage, direct and flexible system, the required power of the load, and the remaining power of the energy storage module in the photovoltaic, storage, direct and flexible system; and performing energy scheduling control on the photovoltaic, storage, direct and flexible system based on the current off-grid control mode.

[0015] In some embodiments, the control method of the photovoltaic, storage, direct-flexible system also includes: when the photovoltaic, storage, direct-flexible system is currently in a grid-connected control mode, if the energy storage module is currently being charged, the increase in the power demand of the load is greater than a first change threshold, and the voltage of the DC bus connected to the energy storage module is lower than a first voltage threshold, performing at least one of the following control operations: stopping charging the energy storage module; supplying power to the load from the power grid; activating the power over-generation mode of the photovoltaic power generation module.

[0016] In some embodiments, the control method of the photovoltaic, storage, direct-flexible system also includes: when the photovoltaic, storage, direct-flexible system is currently in a grid-connected control mode or an off-grid control mode, if the energy storage module is currently being discharged, the reduction in the required power of the load is greater than a second change threshold, and the voltage of the DC bus connected to the energy storage module is higher than a second voltage threshold, performing at least one of the following control operations: reducing the discharge power of the energy storage module; changing the discharge of the energy storage module to charging the energy storage module; starting the energy discharge circuit to discharge the energy of the photovoltaic, storage, direct-flexible system, wherein the second voltage threshold is greater than the first voltage threshold.

[0017] According to a second aspect of the present disclosure, a control device for a PV-storage-direct-flexible system is provided, comprising: a module for executing the control method for the PV-storage-direct-flexible system as described above.

[0018] According to a third aspect of the present disclosure, a control device for a PV-storage-direct-flexible system is provided, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute the control method for the PV-storage-direct-flexible system as described above based on instructions stored in the memory.

[0019] According to a fourth aspect of the present disclosure, a photovoltaic-storage-direct-flexible energy station is provided, comprising: a control device of the photovoltaic-storage-direct-flexible system as described above.

[0020] According to a fifth aspect of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the instructions are executed by a processor, the control method of the solar-storage direct-flexible system as described above is implemented.

[0021] According to a sixth aspect of the present disclosure, a computer program product is provided, on which computer program instructions are stored. When the instructions are executed by a processor, the control method of the solar-storage direct-flexible system as described above is implemented.

[0022] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0024] Figure 1 is a schematic diagram of the architecture of a solar-storage direct-flexible system according to some embodiments of the present disclosure;

[0025] Figure 2 is a flowchart of a control method for a solar-storage direct-flexible system according to some embodiments of the present disclosure;

[0026] Figure 3 is a schematic diagram of participating modules in a first grid-connected control mode according to some embodiments of the present disclosure;

[0027] Figure 4 is a schematic diagram of participating modules in a second grid-connected control mode according to some embodiments of the present disclosure;

[0028] Figure 5 is a schematic diagram of participating modules in an off-grid control mode according to some embodiments of the present disclosure;

[0029] Figure 6 is a partial flow chart of a control method for a solar-storage direct-flexible system according to other embodiments of the present disclosure;

[0030] Figure 7 is a partial flow chart of a control method for a solar-storage direct-flexible system according to other embodiments of the present disclosure;

[0031] Figure 8 is a structural schematic diagram of a control device for a solar-storage direct-flexible system according to some embodiments of the present disclosure;

[0032] Figure 9 is a schematic structural diagram of a control device for a solar-storage direct-flexible system according to other embodiments of the present disclosure;

[0033] Figure 10 It is a structural diagram of a photovoltaic storage direct flexible energy station according to some embodiments of the present disclosure.

[0034] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0036] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0037] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0038] Technologies, methods and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods and equipment should be considered part of the authorization specification.

[0039] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0040] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0041] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0042] To address the shortcomings of energy scheduling solutions for PV-storage-direct-flexible systems in related technologies, the present disclosure proposes a control method, device, and storage medium for PV-storage-direct-flexible systems. In the disclosed solution, a control mode is determined by comprehensively considering information such as the operating status of the PV-storage-direct-flexible system, the power of each module in the system, and grid electricity price information. This method can meet the energy scheduling needs of the PV-storage-direct-flexible system in both grid-connected and off-grid states, especially the refined grid-connected energy scheduling needs, thereby improving the efficiency and scenario applicability of the energy scheduling of the PV-storage-direct-flexible system.

[0043] Figure 1 This is a schematic diagram of the architecture of a solar-storage direct-flexible system according to some embodiments of the present disclosure. Figure 1 As shown, the photovoltaic storage direct and flexible system in the embodiment of the present disclosure includes a photovoltaic storage direct and flexible energy station, a photovoltaic power generation module 103 connected to the photovoltaic storage direct and flexible energy station, a power grid 106 and a load 114.

[0044] In some examples, a photovoltaic-storage-direct-flexible energy station includes a photovoltaic converter 101, a grid-side converter 104, an energy storage converter 109, an energy storage module 110, and a control device 111 of the photovoltaic-storage-direct-flexible system.

[0045] The photovoltaic power generation module 103 is used to perform photovoltaic power generation to provide electrical energy for the system. The photovoltaic power generation module 103 can be connected to the photovoltaic converter 101 via the photovoltaic interface 102 in the photovoltaic storage direct flexible energy station. The photovoltaic converter 101 can also be called a photovoltaic inverter, which can be used to realize the photovoltaic maximum power point tracking (MPPT) function. MPPT is a technology applied to solar power generation systems, mainly used to optimize the power output of photovoltaic modules. The core of MPPT is to ensure that the photovoltaic modules always operate at the maximum power point under different environmental conditions by adjusting the working status of the electrical modules in real time. For example, the rated output power of the photovoltaic converter 101 can be set to 5kW.

[0046] Grid 106 can be connected to grid-side converter 104 via the AC input interface 105 of the PV-storage direct current flexible energy station. Grid-side converter 104 can be used to implement bidirectional AC-DC conversion. Furthermore, grid-side converter 104 can also establish a DC bus voltage and operate in a DC bus constant voltage mode.

[0047] Energy storage module 110 can be installed within a solar-powered, direct-current-storage, flexible energy station and connected to energy storage converter 109 via a DC bus (e.g., a 48V DC bus). The energy storage module can include a battery management system and batteries. Energy storage converter 109 can be used to implement bidirectional DC-DC conversion.

[0048] The load 114 can be connected to the above-mentioned DC bus through the DC interface 113 of the photovoltaic storage direct flexible energy station, thereby realizing a "one mother dual use" architecture, that is, an architecture in which the DC bus (for example, a 48V DC bus) is simultaneously connected to the energy storage module and the load. In this way, on the one hand, the load is directly driven by the DC bus, which reduces the AC-DC conversion link and improves the system efficiency; on the other hand, the energy storage module is charged and the DC load is powered at the same time through the 48V DC bus, which saves the charging circuit and reduces the equipment complexity and manufacturing cost. In addition, in a specific implementation, the energy storage module 110 can also be set outside the photovoltaic storage direct flexible energy station.

[0049] The control device 111 of the PV-storage-direct-flexible system can perform energy scheduling control on the PV-storage-direct-flexible system by communicating with modules such as the photovoltaic converter 101, the grid-side converter 104, and the energy storage converter 109.

[0050] In some examples, the PV-storage direct-flexible energy station may also include a generator interface 107. Generator 108 can be connected to the PV-storage direct-flexible energy system via generator interface 107 to provide emergency power to the system. Furthermore, the PV-storage direct-flexible energy station may also include an AC output interface 112 to power AC loads.

[0051] In the embodiments of the present disclosure, the following beneficial effects can be achieved through the above-mentioned photovoltaic, energy storage, direct-current and flexible system architecture: directly driving devices (such as 48V DC loads) through the DC bus reduces the conversion loss of powering the 48V DC loads; adopting a "one bus, two uses" architecture allows the DC load and the energy storage module to be directly connected to the DC bus, saving independent charging circuits and realizing "charging-power supply" integration; the photovoltaic, energy storage, direct-current and flexible system architecture is suitable for various application scenarios such as communication base stations, green buildings, and off-island power supply, and has both high efficiency, stability and scenario adaptability.

[0052] Figure 2 FIG is a flow chart of a control method for a solar-storage direct-flexible system according to some embodiments of the present disclosure. Figure 2 As shown, the control method of the PV-storage direct-flexible system can be executed by a control device of the PV-storage direct-flexible system, and the method includes steps S21 to S23.

[0053] In step S21, the operating status information of the PV-storage-direct-flexible system is obtained.

[0054] Step 21 can be implemented in a variety of ways, and two implementations are used for exemplary description below.

[0055] In a first embodiment, a control device of a PV-storage-direct-flexible system receives an operation status setting instruction from a user and obtains operation status information of the PV-storage-direct-flexible system from the operation status setting instruction. The operation status information indicates whether the PV-storage-direct-flexible system is in a grid-connected state or an off-grid state.

[0056] In a second embodiment, the control device of the PV-DC-flexible system communicates with one or more modules, such as the grid-side converter and the energy storage converter, to obtain operating status information of the PV-DC-flexible system. This operating status information indicates whether the PV-DC-flexible system is grid-connected or off-grid. Furthermore, in a specific implementation, the control device of the PV-DC-flexible system may also obtain operating status information of the PV-DC-flexible system through other means.

[0057] In step S22, when the photovoltaic, storage, direct-flexible system is in a grid-connected state, the current grid-connected control mode of the photovoltaic, storage, direct-flexible system is determined based on multiple items including the generated power of the photovoltaic power generation module, the required power of the load, the remaining power of the energy storage module, and the electricity price information of the power grid.

[0058] In step S23, energy dispatch control is performed on the PV-storage-direct-flexible system based on the current grid-connected control mode. The PV-storage-direct-flexible system can support at least two of the first through fifth grid-connected control modes. For example, the PV-storage-direct-flexible system supports the first through fifth grid-connected control modes. Information regarding these modes is shown in Table 1.

[0059] Table 1

[0060]

[0061] Combined with Table 1 and Figure 3 、 Figure 4 It can be seen that the participating modules in the first to fifth grid-connected control modes all involve photovoltaic power generation modules, power grids, energy storage modules, and loads. Among them, in the first grid-connected control mode, the energy flow between system modules is from the photovoltaic power generation modules to the loads, energy storage modules, and power grids; in the second grid-connected control mode, the energy flow between system modules is from the photovoltaic power generation modules and power grids to the loads and energy storage modules; in the third grid-connected control mode, the energy flow between system modules is from the photovoltaic power generation modules to the loads, and from the power grid to the loads and energy storage modules; in the fourth grid-connected control mode, the energy flow between system modules is from the photovoltaic power generation modules to the energy storage modules, and from the energy storage modules to the loads, with the power grid serving as a backup power supply source for the loads; in the fifth grid-connected control mode, the energy flow between system modules is from the photovoltaic power generation modules to the loads and power grids, and from the energy storage modules to the power grids.

[0062] The following uses the PV-storage direct-flexible system with the first to fifth grid-connected control modes as an example to exemplify steps S22 and S23.

[0063] In some examples, step S22 includes determining that the current grid-connected control mode is the first grid-connected control mode when the power generated by the photovoltaic power generation module is greater than or equal to the power demanded by the load and the remaining state of charge (SOC) of the energy storage module is less than or equal to a first threshold. The first threshold can be flexibly set according to needs. For example, the first threshold is set to 0.9.

[0064] Further, in the above example, when it is determined that the current grid-connected control mode is the first grid-connected control mode, step S23 includes: controlling the photovoltaic power generation module to preferentially provide the generated power to the load; controlling the photovoltaic power generation module to charge the energy storage module based on the remaining part of the generated power after deducting the power provided to the load; and when there is still residual power after deducting the power provided to the load and the energy storage module from the generated power, controlling the photovoltaic power generation module to provide the residual power to the grid.

[0065] In specific implementation, the control device of the photovoltaic, storage, direct-current and flexible system can implement the energy scheduling control steps for the photovoltaic, storage, direct-current and flexible system described in step S23 under the first grid-connected control mode by sending instructions to one or more modules such as the photovoltaic converter, the grid-side converter, and the energy storage converter.

[0066] For example, when the current grid-connected control mode is the first grid-connected control mode, the control operations performed by the control device of the photovoltaic-storage-direct-flexible system include: step a1, making the photovoltaic converter operate in the MPPT mode to maximize the power generation power of the photovoltaic power generation module output by it, and feeding back the power generation power of the photovoltaic power generation module to the grid-side converter and the energy storage converter in real time; step a2, making the grid-side converter and the energy storage converter distribute power according to the following strategy: give priority to taking power from the photovoltaic converter to meet the load demand; provide the remaining part of the power generation power of the photovoltaic power generation module except for supplying the load to the energy storage module, that is, use part of the power generation power of the photovoltaic power generation module to charge the energy storage module; if the power generation power of the photovoltaic power generation module still has surplus after supplying the load and the energy storage module, the remaining part will be provided to the power grid, that is, use part of the power generation power of the photovoltaic power generation module to feed the grid. In specific implementation, when charging the energy storage module based on the photovoltaic power generation module, charging can be performed based on the maximum charging power allowed by the energy storage module; when using part of the generated power of the photovoltaic power generation module to feed the grid, current inversion can be performed based on the grid-side converter to meet the requirements of grid voltage and frequency synchronization.

[0067] In the disclosed embodiment, the control mode is determined by comprehensively considering the system's operating status information, the power of each module in the system, grid electricity price information, and other information. This can meet the energy scheduling needs of the photovoltaic, storage, direct and flexible system in both grid-connected and off-grid states, especially the refined grid-connected energy scheduling needs, thereby improving the efficiency and scenario applicability of the energy scheduling of the photovoltaic, storage, direct and flexible system. Furthermore, by supporting the first grid-connected control mode, it is possible to maximize photovoltaic utilization, reduce grid power purchases, and help improve the efficiency of energy scheduling of the photovoltaic, storage, direct and flexible system.

[0068] In other examples, step S22 includes: when the power generation power of the photovoltaic power generation module is less than the required power of the load and the electricity price information of the grid indicates that the electricity price is at a low point, determining that the current grid-connected control mode is the second grid-connected control mode.

[0069] Furthermore, in the above example, step S23 includes: when the current grid-connected control mode is the second grid-connected control mode, controlling the photovoltaic power generation module to preferentially provide the generated power to the load; controlling the power grid to supply the portion of power required by the load after deducting the portion supplied by the photovoltaic power generation module; and controlling the power grid to charge the energy storage module until the remaining power of the energy storage module is greater than or equal to the first threshold.

[0070] In specific implementation, the control device of the photovoltaic, storage, direct-current and flexible system can implement the energy scheduling control steps for the photovoltaic, storage, direct-current and flexible system described in step S23 under the second grid-connected control mode by sending instructions to one or more modules such as the photovoltaic converter, the grid-side converter, and the energy storage converter.

[0071] For example, when the current grid-connected control mode is the second grid-connected control mode, the control operations performed by the control device of the photovoltaic-storage-direct-flexible system include: step b1, allowing the photovoltaic inverter to maintain the MPPT working mode to maximize the power generation power of the photovoltaic power generation module output by it, and to feed back the power generation power of the photovoltaic power generation module to the grid-side inverter and the energy storage inverter in real time; step b2, allowing the grid-side inverter and the energy storage inverter to distribute power according to the following strategy: give priority to using the power generation power of the photovoltaic power generation module to supply the load; the power grid supplies the part of the power required by the load other than the part supplied by the photovoltaic power generation module; and draw power from the grid to charge the energy storage module.

[0072] In the above example, when the energy storage module is charged based on the electricity from the power grid, the charging power can be determined according to the following exemplary method: the charging power of the energy storage module is determined based on the current remaining power of the energy storage module and the target remaining power, as well as the duration of the low electricity price period. In addition, in a specific implementation, the energy storage converter can meet the supply current requirements of the load and the energy storage module through the current inversion function. During the charging process, the energy storage converter can also adjust the charging power of the energy storage module based on at least one of the maximum allowable charging power, the remaining power of the battery, and the remaining duration of the low electricity price period fed back in real time by the battery management system, so as to prevent the battery from overcharging while improving the utilization rate of low-priced electricity.

[0073] In the embodiment of the present disclosure, by supporting the second grid-connected control mode, it is possible to fully utilize low-cost electricity and reduce the operating costs of the photovoltaic storage direct-flexible system.

[0074] In some further examples, step S22 includes determining that the current grid-connection control mode is the third grid-connection control mode when the generated power of the photovoltaic power generation module is less than the power demanded by the load, the electricity price information of the power grid indicates that the electricity price is at a peak, and the remaining power of the energy storage module is less than a second threshold. The second threshold is less than the first threshold. In specific implementations, the first and second thresholds can be flexibly set. For example, the first threshold can be set to 90% and the second threshold can be set to 20%.

[0075] Furthermore, in the above example, step S23 includes: when the current grid-connected control mode is the third grid-connected control mode, controlling the photovoltaic power generation module to preferentially provide the generated power to the load; controlling the power grid to supply the portion required by the load after deducting the portion supplied by the photovoltaic power generation module; and controlling the power grid to charge the energy storage module until the remaining power of the energy storage module is greater than or equal to the second threshold.

[0076] In specific implementation, the control device of the photovoltaic, storage, direct-current and flexible system can implement the energy scheduling control steps for the photovoltaic, storage, direct-current and flexible system described in step S23 by sending instructions to one or more modules such as the photovoltaic converter, the grid-side converter, and the energy storage converter.

[0077] For example, when the current grid-connected control mode is the third grid-connected control mode, the control operations performed by the control device of the photovoltaic-storage-direct-flexible system include: step c1, allowing the photovoltaic inverter to maintain the MPPT working mode to maximize the power generation power of the photovoltaic power generation module output by it, and to feed back the power generation power of the photovoltaic power generation module to the grid-side inverter and the energy storage inverter in real time; step b2, allowing the grid-side inverter and the energy storage inverter to distribute power according to the following strategy: all the power generation power of the photovoltaic power generation module is provided to the load; the power grid supplies the part of the power required by the load except for the part supplied by the photovoltaic power generation power; and the energy storage module is charged based on the electric energy of the grid.

[0078] In the above example, when charging the energy storage module, the energy storage converter can determine the charging power of the energy storage module according to the following exemplary method: determine the charging power of the energy storage module according to the total power consumption limit threshold of the power grid and whether the energy storage module enters the emergency power replenishment mode. For example, the first charging power and the second charging power of the energy storage module are determined according to the total power consumption limit threshold of the power grid and the power that needs to be supplied to the load by the power grid; when the energy storage module does not enter the emergency power replenishment mode, the charging power of the energy storage module is set to the first charging power; when the energy storage module enters the emergency power replenishment mode, the charging power of the energy storage module is set to the second charging power. The first charging power is less than the second charging power. In specific implementation, the energy storage converter can obtain indication information of whether the energy storage module enters the emergency power replenishment mode by communicating with the battery management system, so as to dynamically determine the charging power according to the indication information.

[0079] In the disclosed embodiments, by supporting the third grid-connected control mode, it is possible to prevent over-discharge of the energy storage module while ensuring basic power supply. Furthermore, by determining the charging power of the energy storage module based on the total power limit threshold of the grid and whether the energy storage module has entered emergency power replenishment mode, it is possible to improve the efficiency and flexibility of charging the energy storage module while preventing sudden increases in grid load caused by charging.

[0080] In some further examples, step S22 includes determining that the current grid-connection control mode is the fourth grid-connection control mode when the grid electricity price information indicates that the electricity price is at a peak and the remaining power of the energy storage module is greater than or equal to a second threshold. The second threshold is less than the first threshold. For example, the first threshold is 0.9 and the second threshold is 0.2.

[0081] In the above example, step S23 includes: when the current grid-connected control mode is the fourth grid-connected control mode, controlling the photovoltaic power generation module to preferentially charge the energy storage module; controlling the energy storage module to preferentially supply power to the load; and when the energy storage module cannot meet the power required by the load, controlling the grid to supply the power required by the load after excluding the power supplied by the energy storage module.

[0082] In some embodiments, in the fourth grid-connected control mode, controlling the energy storage module to preferentially supply power to the load includes: obtaining the current battery health (State of Health, SOH) of the energy storage module; determining, based on the battery health, the maximum allowable supply current of the energy storage module for supplying power to the load; and controlling the energy storage module to supply power to the load based on the maximum allowable supply current.

[0083] Among them, determining the maximum allowable supply current of the energy storage module to supply power to the load based on the battery health can specifically include: when the battery health is greater than or equal to the first health threshold, setting the maximum allowable supply current of the energy storage module for the load to the first current threshold; when the battery health is greater than or equal to the second health threshold and less than the first health threshold, setting the maximum allowable supply current of the energy storage module for the load to the second current threshold; when the battery health is less than the second health threshold, setting the maximum allowable supply current to the third current threshold. The second current threshold is less than the first current threshold, and the third current threshold is less than the second current threshold. In specific implementation, the first health threshold, the second health threshold, and the first to third current thresholds can be flexibly set. For example, the first health threshold is 90%, the second health threshold is 80%, the first current threshold is 2C, the second current threshold is 1C, and the third current threshold is 0.5C.

[0084] In the embodiment of the present disclosure, by supporting the fourth grid-connected control mode, the dependence of the photovoltaic storage direct-flexible system on the power grid can be reduced, and the life of the energy storage module can be extended. Furthermore, by determining the maximum allowable power supply current based on the battery health when using the energy storage module to power the load, it helps to reduce battery loss and extend the service life of the battery. By comparing the battery health with the first health threshold and the second health threshold, the maximum allowable power supply current of the energy storage module for the load can be determined more finely, thereby further improving the efficiency of powering the load while minimizing battery loss.

[0085] In some other examples, step S22 includes determining that the current grid-connected control mode is the fifth grid-connected control mode when the power generated by the photovoltaic power generation module is greater than or equal to the power required by the load and the remaining power of the energy storage module is greater than a first threshold. For example, the first threshold is 0.9.

[0086] In the above example, step S23 includes: when the current grid-connected control mode is the fifth grid-connected control mode, controlling the photovoltaic power generation module to preferentially provide the generated power to the load; controlling the photovoltaic power generation module to feed power to the grid based on the remaining portion of the generated power after excluding the portion provided to the load; controlling the energy storage module to feed power to the grid until the remaining power of the energy storage module is less than or equal to the first threshold; and controlling the photovoltaic power generation module and the grid to prohibit charging the energy storage module.

[0087] In the embodiment of the present disclosure, by supporting the fifth grid-connected control mode, when the energy storage module is fully charged, the benefits can be maximized by feeding power to the grid while preventing the energy storage module from being damaged by overcharging.

[0088] In some embodiments, the control method of the solar-storage direct-flexible system includes: Figure 2 In addition to the steps shown, it also includes the control process in off-grid control mode. Figure 5 As shown, the participating modules in the off-grid control mode involve photovoltaic power generation modules, energy storage modules and loads. The control process in the off-grid control mode may include: when the photovoltaic storage direct-flexible system is in an off-grid state, determining the current off-grid control mode according to the power generation power of the photovoltaic power generation module in the photovoltaic storage direct-flexible system, the required power of the load, and the remaining power of the energy storage module in the photovoltaic storage direct-flexible system; and performing energy scheduling control on the photovoltaic storage direct-flexible system based on the current off-grid control mode. Through the above steps, support for grid-connected and off-grid control modes can be achieved, ensuring power supply continuity in grid-connected and off-grid scenarios, helping to improve the scenario applicability of the photovoltaic storage direct-flexible system control method and improving user experience.

[0089] In the disclosed embodiment, through the above steps, a control method for a solar-storage direct-flexible system with high efficiency, stability and scene adaptability is realized, which can be widely used in communication base stations, green buildings, off-island power supply and other fields.

[0090] Figure 6 This is a partial flow chart of a control method for a solar-storage direct-flexible system according to other embodiments of the present disclosure. Figure 6 As shown, the control method of the solar-storage direct-flexible system includes Figure 2 In addition to the process shown, steps S61 to S65 are also included.

[0091] In step S61 , a load surge is detected.

[0092] When the PV-storage-direct-flexible system is currently in grid-connected control mode and the energy storage module is currently being charged, the control device of the PV-storage-direct-flexible system monitors whether there is a sudden increase in load.

[0093] In some examples, the control device of the PV-storage-direct-flexible system monitors whether there is a sudden load increase using an electric meter. For example, if the control device of the PV-storage-direct-flexible system detects an increase in the load power demand exceeding a first change threshold, a sudden load increase is determined. Furthermore, in specific implementations, other methods can be used to monitor whether there is a sudden load increase. For example, monitoring the load current can be used to determine whether there is a sudden load increase.

[0094] In step S62, it is detected that the DC bus voltage is lower than a first voltage threshold, wherein the first voltage threshold can be flexibly set.

[0095] In the embodiment of the present disclosure, the execution order of step S61 and step S62 is not limited. In specific implementation, step S61 can be executed first and then step S62, or can be executed simultaneously, or can be executed first and then step S61.

[0096] After determining through steps S61 and S62 that the load suddenly increases and the DC bus voltage in the PV-storage-DC-flexible system is lower than the first voltage threshold, at least one of steps S63 to S65 may be executed.

[0097] In step S63, charging of the energy storage module is stopped.

[0098] In some examples, the control device of the PV-storage-direct-flexible system instructs the energy storage module to stop charging by sending a control instruction to the energy storage converter.

[0099] In step S64 , the grid is enabled to supply power to the load.

[0100] In some examples, the control device of the PV-storage direct-flexible system instructs the grid to supply power to the load by sending control instructions to the grid-side converter.

[0101] In step S65 , the photovoltaic super-generation mode is activated.

[0102] In some examples, a control device of a PV-storage direct-current-flexible system sends a control instruction to a PV inverter to instruct the activation of a power over-generation mode of the PV inverter.

[0103] In the embodiment of the present disclosure, the above steps can reduce the fluctuation of the bus voltage when the load suddenly increases, thereby helping to improve the stability of the bus voltage and further improve the stability of the energy scheduling of the solar-storage direct-flexible system.

[0104] Figure 7 This is a partial flow chart of a control method for a solar-storage direct-flexible system according to other embodiments of the present disclosure. Figure 7 As shown, the control method of the solar-storage direct-flexible system includes Figure 2 In addition to the process shown, steps S71 to S75 are also included.

[0105] In step S71 , load dump is detected.

[0106] When the PV-storage-direct-flexible system is currently in grid-connected or off-grid control mode and the energy storage module is currently being discharged, the control device of the PV-storage-direct-flexible system monitors whether the load suddenly drops.

[0107] In some examples, the control device of the PV-storage-direct-flexible system monitors whether a sudden load drop occurs using an electric meter. For example, if the control device of the PV-storage-direct-flexible system detects a decrease in the load power demand by greater than a second change threshold, a load sudden drop is determined. Furthermore, in specific implementations, other methods can be used to monitor whether a sudden load drop occurs. For example, load current can be monitored to determine whether a sudden load drop has occurred.

[0108] In step S72, it is detected that the DC bus voltage is higher than a second voltage threshold. The second voltage threshold is greater than the first voltage threshold. In specific implementation, the second voltage threshold and the first voltage threshold can be flexibly set.

[0109] In the embodiment of the present disclosure, the execution order of step S71 and step S72 is not limited. In specific implementation, step S71 can be executed first and then step S72, or step S71 and step S72 can be executed simultaneously, or step S72 can be executed first and then step S71.

[0110] After determining load dump and the DC bus voltage in the PV-storage-DC-flexible system is greater than the second voltage threshold through steps S71 and S72, at least one of steps S73 to S75 may be executed.

[0111] In step S73 , the discharge power of the energy storage module is reduced.

[0112] In some examples, the control device of the PV-storage-direct-flexible system sends a control instruction to the energy storage converter to instruct it to reduce the discharge power of the energy storage module.

[0113] In step S74, the energy storage module is charged.

[0114] In some examples, the control device of the PV-storage-direct-flexible system sends a control instruction to the energy storage converter to instruct the energy storage module to switch from discharging to charging.

[0115] In step S75 , the energy discharge module is started.

[0116] In some examples, a control device of the PV-storage direct-flexible system instructs to start an energy discharge circuit to discharge excess energy in the PV-storage direct-flexible system.

[0117] In the embodiment of the present disclosure, the above steps can reduce the fluctuation of the bus voltage when the load drops, thereby helping to improve the stability of the bus voltage and further improve the stability of the energy scheduling of the solar-storage direct-flexible system.

[0118] Figure 8 Schematic diagram of the structure of the control device of the solar-storage direct-flexible system according to some embodiments of the present disclosure. Figure 8 As shown, the control device 80 of the PV-storage-direct-flexible system is used to execute the control method of the PV-storage-direct-flexible system as described above, including an acquisition module 81, a determination module 82 and a control module 83.

[0119] The acquisition module 81 is configured to acquire operating status information of the PV-storage-direct-flexible system, wherein the operating status information is used to indicate whether the PV-storage-direct-flexible system is in a grid-connected state or an off-grid state.

[0120] The determination module 82 is configured to determine the current grid-connected control mode of the photovoltaic, storage, direct and flexible system from multiple grid-connected control modes based on the power generation power of the photovoltaic power generation module in the photovoltaic, storage, direct and flexible system, the required power of the load, the remaining power of the energy storage module in the photovoltaic, storage, direct and flexible system, and the electricity price information of the power grid when the photovoltaic, storage, direct and flexible system is in a grid-connected state.

[0121] The control module 83 is configured to perform energy scheduling control on the PV-storage direct-flexible system based on the current grid-connected control mode.

[0122] In the embodiments of the present disclosure, the above device can meet the energy scheduling needs of the photovoltaic storage direct-flexible system in both grid-connected and off-grid states, especially the refined grid-connected energy scheduling needs, thereby improving the efficiency and scenario applicability of energy scheduling.

[0123] Figure 9 Schematic diagram of the structure of the control device of the solar-storage direct-flexible system according to other embodiments of the present disclosure. Figure 9 As shown, a control device 90 for a PV-storage, direct-flexible system includes a memory 91 and a processor 92 coupled to the memory 91. Memory 91 is configured to store instructions corresponding to embodiments of a control method for a PV-storage, direct-flexible system. Processor 92 is configured to execute the control method for a PV-storage, direct-flexible system according to any of the embodiments of the present disclosure based on the instructions stored in memory 91.

[0124] Figure 10 This is a schematic diagram of the structure of a photovoltaic storage direct flexible energy station according to some embodiments of the present disclosure. Figure 10 As shown, the photovoltaic-storage-direct-flexible energy station 100 includes a control device 111 of the photovoltaic-storage-direct-flexible system.

[0125] The control device 111 of the PV-storage-direct-flexible system is configured to execute the control method of the PV-storage-direct-flexible system as described above.

[0126] In the embodiments of the present disclosure, the above device can meet the energy scheduling needs of the photovoltaic storage direct-flexible system in both grid-connected and off-grid states, especially the refined grid-connected energy scheduling needs, thereby improving the efficiency and scenario applicability of energy scheduling.

[0127] Various aspects of the present disclosure are described herein with reference to flowcharts and / or block diagrams of control methods, apparatus, and computer program products for a PV-storage direct-flexible system according to embodiments of the present disclosure. It should be understood that each block of the flowcharts and / or block diagrams, as well as combinations of blocks, can be implemented by computer-readable program instructions.

[0128] These computer-readable program instructions may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable device to produce a machine, so that the processor executes the instructions to produce means for implementing the functions specified in one or more blocks in the flowcharts and / or block diagrams.

[0129] These computer-readable program instructions may also be stored in a computer-readable memory, which cause the computer to operate in a specific manner to produce an article of manufacture, including instructions for implementing the functions specified in one or more blocks in the flowcharts and / or block diagrams.

[0130] The present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects.

[0131] The control method, device, and storage medium for the solar-to-storage direct-flexible system according to the present disclosure have been described in detail. To avoid obscuring the concepts of the present disclosure, some details known in the art have been omitted. Based on the above description, those skilled in the art will fully understand how to implement the technical solutions disclosed herein.

Claims

1. A control method for a solar-storage direct-flexible system, comprising: Obtaining operating status information of the PV-storage-direct-flexible system, wherein the operating status information is used to indicate whether the PV-storage-direct-flexible system is in a grid-connected state or an off-grid state; When the solar-storage direct-flexible system is in a grid-connected state, determining the current grid-connected control mode of the solar-storage direct-flexible system from multiple grid-connected control modes according to multiple items including the generated power of the photovoltaic power generation module in the solar-storage direct-flexible system, the required power of the load, the remaining power of the energy storage module in the solar-storage direct-flexible system, and the electricity price information of the power grid; Based on the current grid-connected control mode, energy scheduling control is performed on the solar-storage direct-flexible system.

2. The control method of the solar-storage direct-flexible system according to claim 1, wherein: Determining the current grid-connected control mode of the photovoltaic-storage-direct-flexible system from a plurality of grid-connected control modes includes: determining that the current grid-connected control mode is the first grid-connected control mode when the power generation power of the photovoltaic power generation module is greater than or equal to the required power of the load and the remaining power of the energy storage module is less than or equal to a first threshold; The energy dispatching control of the photovoltaic storage direct-flexible system based on the current grid-connected control mode includes: when the current grid-connected control mode is the first grid-connected control mode, controlling the photovoltaic power generation module to preferentially provide the generated power to the load; controlling the photovoltaic power generation module to charge the energy storage module based on the remaining part of the generated power after deducting the power provided to the load; and when there is still residual power after deducting the power provided to the load and the energy storage module from the generated power, controlling the photovoltaic power generation module to provide the residual power to the power grid.

3. The control method of the solar-storage direct-flexible system according to claim 1, wherein: Determining the current grid-connected control mode of the photovoltaic-storage-direct-flexible system from a plurality of grid-connected control modes includes: determining that the current grid-connected control mode is the second grid-connected control mode when the power generated by the photovoltaic power generation module is less than the power demand of the load and the electricity price information of the grid indicates that the electricity price is at a low point; The energy scheduling control of the photovoltaic storage direct-flexible system based on the current grid-connected control mode includes: when the current grid-connected control mode is the second grid-connected control mode, controlling the photovoltaic power generation module to preferentially provide the generated power to the load; controlling the power grid to supply the part required by the load except the supply part of the photovoltaic power generation module; and controlling the power grid to charge the energy storage module until the remaining power of the energy storage module is greater than or equal to a first threshold.

4. The control method of the solar-storage direct-flexible system according to claim 2, wherein: Determining the current grid-connected control mode of the solar-storage-direct-flexible system from a plurality of grid-connected control modes includes: determining that the current grid-connected control mode is a third grid-connected control mode when the generated power of the photovoltaic power generation module is less than the required power of the load, the electricity price information of the grid indicates that the electricity price is at a peak, and the remaining power of the energy storage module is less than a second threshold, wherein the second threshold is less than the first threshold; The energy scheduling control of the photovoltaic storage direct-flexible system based on the current grid-connected control mode includes: when the current grid-connected control mode is the third grid-connected control mode, controlling the photovoltaic power generation module to preferentially provide the generated power to the load; controlling the power grid to supply the part required by the load except the part supplied by the photovoltaic power generation module; and controlling the power grid to charge the energy storage module until the remaining power of the energy storage module is greater than or equal to the second threshold.

5. The control method of the solar-storage direct-flexible system according to claim 2, wherein: Determining the current grid-connected control mode of the solar-storage direct-flexible system from a plurality of grid-connected control modes includes: determining that the current grid-connected control mode is a fourth grid-connected control mode when the electricity price information of the power grid indicates that the electricity price is at a peak and the remaining power of the energy storage module is greater than or equal to a second threshold, wherein the second threshold is less than the first threshold; The energy scheduling control of the photovoltaic storage direct-flexible system based on the current grid-connected control mode includes: when the current grid-connected control mode is the fourth grid-connected control mode, controlling the photovoltaic power generation module to give priority to charging the energy storage module; controlling the energy storage module to give priority to supplying power to the load; when the energy storage module cannot meet the power required by the load, controlling the power grid to supply the part required by the load except the part supplied by the energy storage module.

6. The control method of the solar-storage direct-flexible system according to claim 5, wherein: The controlling the energy storage module to preferentially supply power to the load includes: Obtaining the current battery health of the energy storage module; Determining, based on the battery health, a maximum allowable supply current for the energy storage module to supply power to the load; Based on the maximum allowable power supply current, the energy storage module is controlled to supply power to the load.

7. The control method of the solar-storage direct-flexible system according to claim 6, wherein: The determining, based on the battery health, a maximum allowable supply current for the energy storage module to supply power to the load includes: When the battery health is greater than or equal to a first health threshold, setting the maximum allowable supply current to be the first current threshold; When the battery health is greater than or equal to a second health threshold and less than the first health threshold, setting the maximum allowable supply current to a second current threshold, where the second current threshold is less than the first current threshold; When the battery health is less than the second health threshold, the maximum allowable supply current is set to a third current threshold, and the third current threshold is less than the second current threshold.

8. The control method of the solar-storage direct-flexible system according to claim 1, wherein: Determining the current grid-connected control mode of the photovoltaic-storage-direct-flexible system from a plurality of grid-connected control modes includes: determining that the current grid-connected control mode is the fifth grid-connected control mode when the power generation power of the photovoltaic power generation module is greater than or equal to the required power of the load and the remaining power of the energy storage module is greater than a first threshold; The energy dispatching control of the photovoltaic storage direct-flexible system based on the current grid-connected control mode includes: when the current grid-connected control mode is the fifth grid-connected control mode, controlling the photovoltaic power generation module to preferentially provide the generated power to the load; controlling the photovoltaic power generation module to feed the power grid based on the remaining part of the generated power after excluding the part provided to the load; controlling the energy storage module to feed the power grid until the remaining power of the energy storage module is less than or equal to the first threshold; and controlling the photovoltaic power generation module and the power grid to prohibit charging the energy storage module.

9. The control method of the solar-storage direct-flexible system according to any one of claims 1 to 8, further comprising: When the photovoltaic storage direct-flexible system is in an off-grid state, determining the current off-grid control mode according to the power generation power of the photovoltaic power generation module in the photovoltaic storage direct-flexible system, the required power of the load, and the remaining power of the energy storage module in the photovoltaic storage direct-flexible system; Based on the current off-grid control mode, energy scheduling control is performed on the solar-storage direct-flexible system.

10. The control method of the solar-storage direct-flexible system according to any one of claims 1 to 8, further comprising: In the current grid-connected control mode, if the energy storage module is currently being charged, the increase in the power demand of the load is greater than a first change threshold, and the DC bus voltage connected to the energy storage module is lower than a first voltage threshold, at least one of the following control operations is performed: stopping charging the energy storage module; supplying power to the load from the grid; and activating the power over-generation mode of the photovoltaic power generation module.

11. The control method of the solar-storage direct-flexible system according to claim 10, further comprising: When the system is currently in a grid-connected control mode or an off-grid control mode, if the energy storage module is currently being discharged, the reduction in the required power of the load is greater than a second change threshold, and the DC bus voltage connected to the energy storage module is higher than a second voltage threshold, at least one of the following control operations is performed: reducing the discharge power of the energy storage module; changing the discharge of the energy storage module to charging the energy storage module; starting the energy discharge circuit to discharge the energy of the photovoltaic storage direct-flexible system, wherein the second voltage threshold is greater than the first voltage threshold.

12. A control device for a solar-storage direct-flexible system, comprising: A module for executing the control method of the solar-storage direct-flexible system according to any one of claims 1 to 11.

13. A control device for a solar-storage direct-flexible system, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the control method of the solar-storage direct-flexible system according to any one of claims 1 to 11 based on instructions stored in the memory.

14. A solar-storage direct-flexible energy station, comprising: The control device of the solar-storage direct-flexible system as described in claim 12 or 13.

15. A computer-readable storage medium having computer program instructions stored thereon, wherein when the instructions are executed by a processor, the control method of the solar-storage direct-flexible system according to any one of claims 1 to 11 is implemented.

16. A computer program product having computer program instructions stored thereon, wherein when the instructions are executed by a processor, the control method of the solar-storage direct-flexible system according to any one of claims 1 to 11 is implemented.

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