Optical storage system control method and device, electronic equipment and storage medium

Abstract

The invention relates to an optical storage system control method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring a current working mode of the optical storage system; according to the current working mode, when it is determined that the output port outputs outwards, a preset adjustment strategy is determined; the preset adjustment strategy comprises one of a first adjustment strategy and a second adjustment strategy; and performing parameter control on the power supply control module according to a preset adjustment strategy, so that the position of the efficiency point obtained according to the photovoltaic module and / or the energy storage battery in the P-V curve approaches or is equal to the position of the maximum value efficiency point. According to the scheme provided by the invention, the output power of the optical storage system can be automatically adjusted, the energy conversion efficiency of the photovoltaic system is improved, and the power utilization cost of a user is reduced.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic power generation technology, and in particular to a photovoltaic storage system control method, device, electronic equipment and storage medium. Background Art

[0002] With the development of photovoltaic technology, home photovoltaic storage systems have appeared on the market. Specifically, home photovoltaic storage systems can be composed of photovoltaic modules, micro inverters and energy storage systems. When the home photovoltaic storage system is working, it will store excess power generation energy in the energy storage system during the day, and then discharge it to home appliances at night or when the photovoltaic power is insufficient.

[0003] In the related art, the output power of the micro-inverter of the household photovoltaic storage system is not adjustable or has limitations, which leads to energy waste in the application of the household photovoltaic storage system and affects the user's electricity cost. Summary of the invention

[0004] In order to solve or partially solve the problems existing in the related technology, the present application provides a photovoltaic storage system control method, device, electronic device and storage medium, which can automatically adjust the output power of the photovoltaic storage system, improve the energy conversion efficiency of the photovoltaic system, and reduce the user's electricity cost.

[0005] The first aspect of the present application provides a control method for a photovoltaic storage system, wherein the photovoltaic storage system comprises: a power control module and an output port, wherein the power control module is used to control the transmission of power between a photovoltaic module and an energy storage battery and the output port respectively, including: Get the current working mode of the photovoltaic storage system; According to the current working mode, when it is determined that the output port is outputting externally, a preset adjustment strategy is determined; the preset adjustment strategy includes: one of a first adjustment strategy and a second adjustment strategy; The power control module is parameter-controlled according to a preset adjustment strategy so that the efficiency point position obtained in the PV curve according to the photovoltaic components and / or the energy storage battery approaches or is equal to the maximum efficiency point position.

[0006] In some implementations, according to the current working mode, when it is determined that the output port is outputting externally, determining a preset adjustment strategy includes: According to the current working mode, when it is determined that the output port is outputting to the outside and the energy storage battery is charging, or when it is determined that the output port is outputting to the outside and the energy storage battery is not working, the first adjustment strategy is determined to be the preset adjustment strategy; or, when it is determined that the output port is outputting to the outside and the energy storage battery is discharging to the outside, the second adjustment strategy is determined to be the preset adjustment strategy.

[0007] In some implementations, performing parameter control on the power control module according to a preset adjustment strategy includes: When the preset adjustment strategy is determined to be the first adjustment strategy or the third adjustment strategy, obtaining a first power parameter of the photovoltaic component and a second power parameter of the output port; Calculating a first efficiency point position in a PV curve using a first power parameter of the photovoltaic module; According to the first efficiency point position and the second power parameter, the power control module is adjusted to move the first efficiency point position toward the maximum efficiency point position; or, When the preset adjustment strategy is determined to be the second adjustment strategy, the first power parameter of the photovoltaic component, the third power parameter of the energy storage battery, and the second power parameter of the output port are obtained, and the second efficiency point position in the PV curve is calculated with the first power parameter of the photovoltaic component and the third power parameter of the energy storage battery; or, the third power parameter of the energy storage battery and the second power parameter of the output port are obtained, and the third efficiency point position in the PV curve is calculated with the third power parameter of the energy storage battery; The power control module is adjusted according to the second efficiency point position or the third efficiency point position and the second power parameter so that the second efficiency point position or the third efficiency point position moves toward the maximum efficiency point position.

[0008] In some implementations, before performing parameter control on the power control module according to a preset adjustment strategy, the method further includes: Monitor the switching status of the current working mode; The power control module is controlled according to the preset adjustment strategy, including: When the switching state of the current working mode is determined to be a non-switching mode state, the parameters of the power control module are controlled according to a preset adjustment strategy.

[0009] In some embodiments, the method further comprises: When the switching state of the current working mode is determined to be the switching mode state, after the current working mode is switched, the preset adjustment strategy corresponding to the current working mode is re-acquired and the parameters of the power control module are controlled according to the preset adjustment strategy.

[0010] In some implementations, monitoring the switching state of the current working mode includes: Obtaining a current working mode of the photovoltaic storage system, and monitoring at least one of a first monitoring parameter of the photovoltaic component, a second monitoring parameter of the output port, and a third monitoring parameter of the energy storage battery; When the monitoring result meets the preset conditions, the corresponding target working mode is obtained and the switching state of the current working mode is determined to be the switching mode state, otherwise, the switching state of the current working mode is determined to be the non-switching mode state.

[0011] In some implementations, when the monitoring result meets a preset condition, obtaining the corresponding target working mode includes: When the monitoring result meets the preset conditions, the target working mode that meets the preset mode switching route is obtained.

[0012] The second aspect of the present application provides a photovoltaic storage system control device, the photovoltaic storage system comprising: a power control module and an output port, the power control module is used to control the power transmission between the photovoltaic module and the energy storage battery and the output port respectively, including: A mode determination module is used to obtain the current working mode of the system; A strategy acquisition module is used to determine a preset adjustment strategy according to the current working mode when determining that the output port is outputting externally; the preset adjustment strategy includes: one of a first adjustment strategy and a second adjustment strategy; and The parameter adjustment module is used to control the parameters of the power control module according to a preset adjustment strategy so that the efficiency point position obtained in the PV curve according to the photovoltaic components and / or the energy storage battery approaches or is equal to the maximum efficiency point position.

[0013] A third aspect of the present application provides an electronic device, including: Processor; and The memory stores executable codes thereon, and when the executable codes are executed by the processor, the processor is caused to execute the method as described above.

[0014] A fourth aspect of the present application provides a computer-readable storage medium having executable code stored thereon. When the executable code is executed by a processor of an electronic device, the processor is caused to execute the method as described above.

[0015] A fifth aspect of the present application provides a computer program product, including a computer program, which, when executed by a processor, causes the processor to execute the method described above.

[0016] The technical solution provided by this application may have the following beneficial effects: The technical solution of the present application obtains a preset adjustment strategy to control the parameters of the power control module when the photovoltaic storage system outputs externally, and automatically adjusts the output power of the photovoltaic storage system so that the efficiency point position of the photovoltaic storage system in the PV curve approaches or is equal to the maximum efficiency point position, thereby improving the energy conversion efficiency of the photovoltaic system and reducing the user's electricity cost.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0019] Figure 1 is a flow chart of a method for controlling a photovoltaic storage system shown in an embodiment of the present application; Figure 2 is another flow chart of the photovoltaic storage system control method shown in an embodiment of the present application; Figure 3 is another flow chart of the photovoltaic storage system control method shown in an embodiment of the present application; Figure 4 is a schematic diagram of a mode switching route in a photovoltaic storage system control method shown in an embodiment of the present application; Figure 5 is a structural schematic diagram of a photovoltaic storage system control device shown in an embodiment of the present application; Figure 6 is another structural schematic diagram of the photovoltaic storage system control device shown in an embodiment of the present application; Figure 7 It is a schematic diagram of the structure of an electronic device shown in an embodiment of the present application. DETAILED DESCRIPTION

[0020] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0021] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0022] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0023] In the related art, the output power of the micro-inverter of the household photovoltaic storage system is not adjustable or has limitations, which leads to energy waste in the application of the household photovoltaic storage system and affects the user's electricity cost.

[0024] In response to the above problems, an embodiment of the present application provides a photovoltaic storage system control method, which can automatically adjust the output power of the photovoltaic storage system, improve the energy conversion efficiency of photovoltaic components, and reduce users' electricity costs.

[0025] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0026] In the control method of the photovoltaic storage system of the present application, the photovoltaic storage system includes a power control module and an output port, and the power control module is used to control the power transmission between the photovoltaic components and the energy storage battery and the output port respectively. The power control module and the output port can be integrated into the same module located in the photovoltaic storage system, such as a supply and demand balancing module, through which the power transmission between the photovoltaic components, the energy storage battery and the external load is dynamically adjusted.

[0027] It should also be noted that the output port of the photovoltaic storage system of the present application is connected to the power grid (i.e., the load end) through a micro-inverter. In other words, the external output of the photovoltaic storage system is connected to the input interface of the micro-inverter. Specifically, in the related art, the micro-inverter can be provided with an MPPT (Maximum Power Point Tracking) module, and the micro-inverter uses the MPPT module to dynamically limit the real-time output power of the photovoltaic storage system.

[0028] Figure 1 It is a flow chart of a method for controlling a photovoltaic storage system shown in an embodiment of the present application.

[0029] See also Figure 1 The control method of the photovoltaic storage system of the present application includes: S110, obtaining a current working mode of the photovoltaic storage system.

[0030] The current working mode of the photovoltaic storage system corresponds to the working status of different components in the photovoltaic storage system. It can be understood that based on the current working mode of the photovoltaic storage system, the working status of each component in the photovoltaic storage system can be obtained.

[0031] In some embodiments, the current working mode includes one of a standby mode, an energy storage charging mode, a charging and using mode, a photovoltaic power supply mode, a photovoltaic and energy storage co-supply mode, and an energy storage power supply mode. To facilitate the understanding of the above working modes, the above six working modes are described below: Standby mode, at this time the system is in standby state. That is to say, in standby mode, the components of the system are not charged or discharged or the charging and discharging conditions are not met, such as the energy obtained by the photovoltaic components is lower than the start threshold, and the battery capacity of the energy storage battery is lower than the discharge output threshold or the output power set by the system output port is 0.

[0032] Energy storage charging mode, at this time, the system uses all the power generated by the photovoltaic panels to charge the energy storage battery. In other words, in the energy storage charging mode, the system only charges the energy storage battery and does not output power, that is, the output port of the system does not output to the external micro inverter.

[0033] In the charging-while-using mode, the system uses part of the power generated by the photovoltaic modules to charge the energy storage battery, and the other part of the power generated by the photovoltaic modules is used for external output of the system, that is, output to the external micro inverter.

[0034] In photovoltaic power supply mode, the system uses all the power generated by the photovoltaic modules for system output, and the energy storage battery does not supply power. In other words, in photovoltaic power supply mode, the system only generates electricity through photovoltaic modules and outputs it to the external micro inverter.

[0035] In the photovoltaic and energy storage co-supply mode, the photovoltaic modules and energy storage batteries in the system provide the system with external output. In other words, in the photovoltaic and energy storage co-supply mode, the system outputs power to the external micro inverter through the photovoltaic modules and energy storage batteries at the same time.

[0036] Energy storage power supply mode: the system only generates electricity through energy storage batteries for system output, and the photovoltaic modules do not work.

[0037] S120, according to the current working mode, when it is determined that the output port is outputting externally, determining a preset adjustment strategy; the preset adjustment strategy includes: one of a first adjustment strategy and a second adjustment strategy.

[0038] In this step, when the output port outputs external current according to the current working mode of the acquired system, it can be known that the photovoltaic storage system outputs externally, that is, the photovoltaic storage system outputs to the external micro-inverter to determine the preset adjustment strategy for regulating the power control module. Among them, the preset adjustment strategy can be determined as one of the first adjustment strategy and the second adjustment strategy according to different current working modes.

[0039] It can be understood that for different current working modes, one of the first adjustment strategy and the second adjustment strategy can be used to implement the regulation and control process of the photovoltaic storage system. Among them, when the current working mode is the standby mode and the energy storage charging mode, the photovoltaic storage system does not output to the outside, and the power control module can be free of parameter control. In other words, when the current working mode obtained is the standby mode and the energy storage charging mode, step S130 can be omitted.

[0040] In this application, when the photovoltaic storage system is working, that is, when the system is outputting externally or storing energy externally at the same time, the power control module is controlled to control the operation of the system, so as to improve the power generation efficiency of the photovoltaic system, especially to maximize the working efficiency of the photovoltaic components, reduce energy waste, and reduce the electricity cost of users. It should be noted that the maximization of the working efficiency of the photovoltaic components in this application can refer to the photovoltaic components working at their maximum power generation efficiency at the current moment.

[0041] In some embodiments, the power control module in the present application may be a DCDC bidirectional power control module. The DCDC bidirectional power control module can realize energy transfer and regulation between the power supply and the load under direct current (DC) conditions. Based on this, in the present application, the DCDC bidirectional power control module can be used to charge the energy storage battery using the power generated by the photovoltaic module. At the same time, the DCDC bidirectional power control module can also transmit the electric energy stored in the energy storage battery to the output port, that is, to realize power generation of the energy storage battery. Among them, the power control module can adopt the DCDC bidirectional power control module in the relevant technology, which is not limited here.

[0042] S130, performing parameter control on the power control module according to a preset adjustment strategy, so that the efficiency point position obtained according to the photovoltaic component and / or the energy storage battery in the PV curve approaches or is equal to the maximum efficiency point position.

[0043] In this step, the power control module is controlled according to the preset adjustment strategy so that when the photovoltaic storage system is working, the power generation efficiency of the photovoltaic storage system moves closer to the maximum efficiency point position in the PV curve or remains at the maximum efficiency point position.

[0044] The PV curve is used to characterize the power generation efficiency of the photovoltaic storage system. Depending on whether the photovoltaic module participates in power generation and whether the energy storage battery participates in power generation, different methods are used to calculate the efficiency point position in the PV curve. Specifically, the slope of the curve corresponding to the efficiency point position in the PV curve of the photovoltaic module can be solved by the power generation power and power generation voltage of the photovoltaic module and / or energy storage battery participating in power generation at the previous moment and the power generation power and power generation voltage at the next moment. Furthermore, when the slope of the curve is zero, it corresponds to the photovoltaic storage system at the maximum efficiency point position. When the slope of the curve is less than zero, it means that the efficiency point position of the photovoltaic storage system is on the left side of the maximum efficiency point position. When the slope of the curve is greater than zero, it means that the efficiency point position of the photovoltaic module is on the right side of the maximum efficiency point position. Of course, the position of the PV curve of the photovoltaic module at the current moment can also be calculated according to relevant technologies, which is not limited here.

[0045] In daily operation, photovoltaic modules convert solar energy into electrical energy according to light intensity. It can be known that the maximum power generation efficiency of photovoltaic modules on the same day varies with light intensity. Based on this, the PV curves corresponding to photovoltaic modules at different times may be the same or different. Furthermore, the positions of the maximum efficiency points in the PV curves corresponding to photovoltaic modules at different times may also be the same or different. Based on this, it can be known that the PV curves corresponding to the photovoltaic storage systems at different times may be the same or different, and the positions of the maximum efficiency points in the PV curves corresponding to the photovoltaic storage systems at different times may also be the same or different.

[0046] In some embodiments, the PV curve obtained in the present application may include a first simulated PV curve corresponding to the photovoltaic component generating electricity alone, a second simulated PV curve corresponding to the energy storage battery generating electricity alone, and a third simulated PV curve corresponding to the photovoltaic component and the energy storage battery generating electricity together. Among them, the first simulated PV curve can be obtained based on the above-mentioned relevant output parameters of the photovoltaic component alone, the second simulated PV curve can be obtained by simulating the output parameters of the photovoltaic component based on the above-mentioned relevant output parameters of the energy storage battery alone, and the third simulated PV curve can be obtained by simulating the output parameters of the photovoltaic component and the energy storage battery based on the common relevant output parameters of the photovoltaic component and the energy storage battery. The calculation method of the PV curve is as described above and will not be repeated here.

[0047] In the present application, the slope of the curve in the PV curve of the photovoltaic module can be obtained according to the power generation power and power generation voltage of the photovoltaic module at two adjacent moments, and the efficiency point position corresponding to the power generation efficiency of the photovoltaic module at the current moment can be judged according to the slope of the curve to be on the left or right side of the maximum efficiency point position, so as to obtain the preset adjustment strategy corresponding to the power control module. The preset adjustment strategy is used to control the parameters of the power control module so that the efficiency point position in the power generation efficiency PV curve of the photovoltaic module moves close to the maximum efficiency point position or remains at the maximum efficiency point position, so as to improve the power generation efficiency of the photovoltaic module during the system operation process and further reduce the waste of electric energy.

[0048] In this embodiment, the technical solution of the present application obtains a preset adjustment strategy to control the parameters of the power control module when the photovoltaic storage system outputs externally, and automatically adjusts the output power of the photovoltaic storage system so that the efficiency point position of the photovoltaic storage system in the PV curve approaches or is equal to the maximum efficiency point position, thereby improving the energy conversion efficiency of the photovoltaic system and reducing the user's electricity costs.

[0049] Figure 2 FIG. 1 is another flow chart of a method for controlling a photovoltaic storage system according to an embodiment of the present application. Figure 1 Based on the illustrated embodiment, the control method of the photovoltaic storage system is further elaborated in detail.

[0050] See also Figure 2 The control method of the photovoltaic storage system of the present application includes: S210, obtaining a current working mode of the photovoltaic storage system.

[0051] Please refer to the description of step S110 for this step, which will not be repeated here.

[0052] S220, according to the current working mode, when it is determined that the output port is outputting to the outside and the energy storage battery is charging, or when it is determined that the output port is outputting to the outside and the energy storage battery is not working, determine the first adjustment strategy as the preset adjustment strategy; or, when it is determined that the output port is outputting to the outside and the energy storage battery is discharging to the outside, determine the second adjustment strategy as the preset adjustment strategy.

[0053] In this step, according to the current working mode obtained, it is determined whether the energy storage battery is being charged or discharged or not working when the output port is outputting externally, and based on this, one of the first adjustment strategy and the second adjustment strategy is selected as the preset adjustment strategy.

[0054] It can be understood that the working mode corresponding to the output port outputting to the outside and charging the energy storage battery can be the aforementioned charging and using mode, and the working mode corresponding to the output port outputting to the outside and the energy storage battery not working can be the aforementioned photovoltaic power supply mode, that is, the first adjustment strategy corresponds to the charging and using mode and the photovoltaic power supply mode; the working mode corresponding to the output port outputting to the outside and the energy storage battery discharging to the outside can be the aforementioned charging and using mode and energy storage power supply mode, that is, the second adjustment strategy corresponds to the photovoltaic storage co-supply mode and energy storage power supply mode. Further, after determining the current working mode, the preset adjustment strategy is determined according to the above mode corresponding to the current working mode.

[0055] According to the preset adjustment strategy determined in step S220, steps S230 to S240 are continuously executed in sequence, or steps S250 to S260 are continuously executed in sequence.

[0056] S230: When the preset adjustment strategy is determined to be the first adjustment strategy, a first power parameter of the photovoltaic component and a second power parameter of the output port are obtained, and a first efficiency point position in the PV curve is calculated using the first power parameter of the photovoltaic component.

[0057] In this step, when the preset adjustment strategy is determined to be the first adjustment strategy, the current working mode can be determined to be one of the charging-while-using mode and the photovoltaic power supply mode. At this time, the first power parameter of the photovoltaic component and the second power parameter of the output port are obtained. Among them, the first power parameter of the photovoltaic component and the second power parameter of the output port are used for comparison with the preset parameters. When the preset adjustment strategy is determined to be the first adjustment strategy, the current working mode is one of the charging-while-using mode and the photovoltaic power supply mode. At this time, only the photovoltaic component participates in power generation in the photovoltaic storage system, that is, the output of the photovoltaic component is equal to the output of the photovoltaic storage system at this time. According to, the first efficiency point position in the PV curve is calculated with the first power parameter of the photovoltaic component, which is the efficiency point position in the PV curve corresponding to the photovoltaic storage system at this time.

[0058] In some embodiments, the first power parameter of the photovoltaic module may include: the real-time output power of the photovoltaic module. Specifically, the real-time output power Ps of the photovoltaic module may be calculated according to the real-time voltage Us and the real-time current Is of the photovoltaic module. Thus, by performing differential processing on the real-time output power Ps of the photovoltaic module, the slope of the curve corresponding to the efficiency point position in the PV curve of the photovoltaic module may be obtained.

[0059] As an example, the real-time voltage Us(k) and real-time current Is(k) of the photovoltaic module at the current moment, as well as the real-time voltage Us(k-1) and real-time current Is(k-1) of the photovoltaic module at the previous moment, can be obtained, and the real-time output power Ps(k) at the current moment can be calculated from the real-time voltage Us(k) at the previous moment Ps(k-1), combined with the real-time voltage Us(k) at the current moment and the real-time voltage Us(k-1) at the previous moment, and then through differential calculation, dP / dV is calculated to obtain the slope of the curve corresponding to the efficiency point position in the photovoltaic module PV curve. The differential calculation method in the relevant technology can be used, which will not be repeated here.

[0060] Furthermore, the first power parameter of the photovoltaic assembly can be obtained by using a PV power module disposed between the photovoltaic assembly and the photovoltaic storage system. For example, the real-time voltage Us and real-time current Is of the photovoltaic assembly are obtained by the PV power module, and further, the real-time output power Ps of the photovoltaic assembly is calculated by processing the real-time voltage Us and real-time current Is at adjacent moments.

[0061] In some implementations, the second power parameter of the output port may include the real-time output power corresponding to the output port. Specifically, the real-time power Po of the output port may be calculated based on the real-time voltage Uo and the real-time current Io of the output port.

[0062] Furthermore, the second power parameter of the output port can be obtained by using an output power detection module provided at the output end of the photovoltaic storage system. For example, the real-time voltage Uo and real-time current Io of the output port of the photovoltaic storage system are obtained by the output power detection module, and further, the real-time power Po of the output port is calculated according to the real-time voltage Uo and real-time current Io.

[0063] S240: According to the first efficiency point position and the second power parameter, the power control module is adjusted to move the first efficiency point position toward the maximum efficiency point position.

[0064] In this step, according to the first efficiency point position and the second power parameter obtained in step S230, the power control module is adjusted so that the position of the first efficiency point in the PV curve moves toward the maximum efficiency point position, thereby improving the power generation efficiency of the photovoltaic storage system and maximizing the power generation efficiency. In this step, adjusting the power control module may refer to adjusting the output power of the power control module to charge the energy storage battery.

[0065] It should be understood that when the current working mode is the photovoltaic power supply mode, the power control module is in an idle state, that is, the power control module does not need to output externally and does not need to charge the energy storage battery. At this time, the adjustment of the power control module can be a null value, that is, there is no need to adjust the output power of the power control module to charge the energy storage battery. In addition, it should be noted that in the photovoltaic power supply mode, all outputs of the photovoltaic module are used for external output of the photovoltaic storage system. At this time, the first efficiency point position in the PV curve is calculated by the first power parameter of the photovoltaic module, which is the maximum efficiency point position. In other words, in the photovoltaic power supply mode, the photovoltaic storage system is at maximum power generation efficiency.

[0066] S250, when the preset adjustment strategy is determined to be the second adjustment strategy, the first power parameter of the photovoltaic component, the third power parameter of the energy storage battery, and the second power parameter of the output port are obtained, and the second efficiency point position in the PV curve is calculated using the first power parameter of the photovoltaic component and the third power parameter of the energy storage battery; or, the third power parameter of the energy storage battery and the second power parameter of the output port are obtained, and the third efficiency point position in the PV curve is calculated using the third power parameter of the energy storage battery.

[0067] In this step, when the preset adjustment strategy is determined to be the second adjustment strategy, the current working mode can be determined to be one of the photovoltaic and energy storage co-supply mode and the energy storage power supply mode. At this time, the photovoltaic components and the energy storage battery jointly participate in power generation or the energy storage battery generates power alone. When the current working mode is the photovoltaic and energy storage co-supply mode, the first power parameter of the photovoltaic component, the third power parameter of the energy storage battery, and the second power parameter of the output port are obtained. At this time, the photovoltaic component and the energy storage battery jointly generate power, and the first power parameter of the photovoltaic component and the third power parameter of the energy storage battery can be used to calculate the second efficiency point position in the PV curve. When the current working mode is the energy storage power supply mode, the third power parameter of the energy storage battery and the second power parameter of the output port are obtained. At this time, the energy storage battery generates power alone, and the fourth power parameter of the energy storage battery can be used to calculate the third efficiency point position in the PV curve. Among them, the first power parameter of the photovoltaic component, the third power parameter of the energy storage battery and the second power parameter of the output port are used for comparison with the preset parameters; and the above-mentioned second efficiency point position or third efficiency point position can be obtained by simulating the output of the photovoltaic component alone, and calculating the first power parameter of the photovoltaic component and the fourth power parameter of the energy storage battery or only the fourth power parameter of the energy storage battery.

[0068] Specifically, the first power parameter of the photovoltaic module and the second power parameter of the output port refer to those described in step S230, which will not be described again here.

[0069] In addition, the third power parameter of the energy storage battery may include: the real-time output power of the energy storage battery. Specifically, the real-time output power Pb of the energy storage battery may be calculated according to the real-time voltage Ub and real-time current Ib of the energy storage battery during discharge.

[0070] Based on this, when the current working mode is the photovoltaic and storage co-supply mode, the common real-time output power can be calculated according to the real-time output power of the photovoltaic module and the real-time output power of the energy storage battery, and then according to the obtained real-time output power, the slope of the curve corresponding to the efficiency point position in the common PV curve of the photovoltaic module and the energy storage battery can be obtained, so as to obtain the efficiency point position in the PV curve corresponding to the photovoltaic storage system at this time when the current working mode is the photovoltaic and storage co-supply mode. Similarly, when the current working mode is the energy storage power generation mode, the common real-time output power can be calculated according to the real-time output power of the energy storage battery, and then the slope of the curve corresponding to the efficiency point position in the PV curve of the energy storage battery can be obtained, so as to obtain the efficiency point position in the PV curve corresponding to the photovoltaic storage system at this time when the current working mode is the photovoltaic and storage co-supply mode. The above-mentioned method of obtaining the PV curve can be calculated by simulating the corresponding real-time output power (the real-time output power of the photovoltaic module and the real-time output power of the energy storage battery and / or the real-time output power of the energy storage battery) as the real-time output power of the photovoltaic module by the relevant technology, which is not limited here.

[0071] S260: According to the second efficiency point position or the third efficiency point position and the second power parameter, the power control module is adjusted to move the second efficiency point position or the third efficiency point position toward the maximum efficiency point position.

[0072] In this step, according to the second efficiency point position or the third efficiency point position obtained in steps S250 and S260, and the second power parameter, the power control module is adjusted so that the second efficiency point position or the third efficiency point position in the PV curve moves toward the maximum efficiency point position, thereby improving the power generation efficiency of the photovoltaic storage system and maximizing the power generation efficiency. In this step, adjusting the power control module may refer to adjusting the output power of the energy storage battery charging through the power control module.

[0073] It should be understood that in the present application, the adjustment of the power control module in steps S240 and S260 can be to adjust the output power of the power control module in different directions, wherein step S240 is to adjust the output of the power control module in the direction of the output port, and step S260 is to adjust the output of the power control module to the energy storage battery.

[0074] To further understand the parameter adjustment and control process of the power control module in this application, the following takes the current working modes of charging while supplying, photovoltaic power supply, photovoltaic and energy storage combined power supply, and energy storage discharge modes as examples to elaborate on the different parameter adjustment processes of the power control module under different working modes. The position of the efficiency point is represented by dP / dV. When dP / dV>0, it indicates that at this time in the P-V curve, the position of the efficiency point is to the left of the maximum efficiency point position. When dP / dV<0, it indicates that at this time in the P-V curve, the position of the efficiency point is to the right of the maximum efficiency point position. In addition, the real-time power of the output port is defined as Po, and the preset output power set by the photovoltaic and energy storage system is defined as Pt.

[0075] A. The current working mode is the charging while supplying mode: The photovoltaic and energy storage system outputs externally and charges the energy storage battery, that is, the power control module charges the energy storage battery. The output adjustment strategy for the power control module is: A1. When dP / dV>0 and Po>=Pt, the output power of the power control module remains unchanged; when dP / dV>0 and Po<Pt, the output power of the power control module is reduced; A2. When dP / dV<0 and Po<=Pt, the output power of the power control module remains unchanged; when dP / dV<0 and Po>Pt, the output power of the power control module is increased.

[0076] B. The current working mode is the photovoltaic power supply mode: The photovoltaic and energy storage system outputs externally and the energy storage battery does not work, that is, the power control module does not contact the energy storage battery. The output adjustment strategy for the power control module is: Keep the power control module in the standby state.

[0077] In the photovoltaic power supply mode, the real-time voltage Us(k) when the real-time output power Ps(k) of the photovoltaic module reaches the maximum can be recorded, which is the maximum input voltage value Uc of the photovoltaic module corresponding to the maximum real-time output power of the photovoltaic module, and is used as a reference parameter for subsequent P-V curve calculation.

[0078] C. The current working mode is the photovoltaic and energy storage combined power supply mode: The photovoltaic and energy storage system outputs externally and the photovoltaic module and the energy storage battery generate electricity simultaneously, that is, the energy storage battery outputs externally through the power control module. The output adjustment strategy for the power control module is: C1. When dP / dV>0 and Po>=Pt, the output power of the power control module remains unchanged; when dP / dV>0 and Po<Pt, the output power of the power control module is increased; C2. When dP / dV < 0 and when Po <= Pt, the output power of the power control module remains unchanged; when dP / dV < 0 and when Po > Pt, the output power of the power control module is decreased.

[0079] D. The current working mode is the photovoltaic-storage co-supply mode: The photovoltaic-storage system outputs externally and the energy storage battery generates electricity independently, that is, the energy storage battery outputs externally through the power control module. The output adjustment strategy for the power control module is as follows: D1. When dP / dV > 0 and when Po >= Pt, the power control module remains unchanged; when Po < Pt and when dP / dV > 0, the output power of the power control module is increased; D2. When dP / dV < 0 and when Po <= Pt, the power control module remains unchanged; when dP / dV < 0 and when Po > Pt, the output power of the power control module is decreased.

[0080] In the current working modes listed above, when dP / dV > 0 and the load end of the photovoltaic-storage system is a micro-inverter, the micro-inverter will reduce the power based on the MPPT algorithm, so as to reduce the real-time output power Po at the output end of the photovoltaic-storage system. Further, in the current working modes listed above, according to the preset control threshold, the output power adjustment process of the power control module is controlled. For example, a power reduction threshold is set. When the power control module reduces the output power to reach the power reduction threshold, the adjustment of the output power of the power control module is stopped; for another example, a power increase threshold is set. When the power control module increases the output power to reach the power increase threshold, the adjustment of the output power of the power control module is stopped.

[0081] In this embodiment, the technical solution of the present application determines different preset adjustment strategies according to different current working modes, meets the requirement of adjusting the system output power correspondingly for different working modes, realizes the dynamic adjustment of the photovoltaic-storage system, and further enables the system to achieve the optimal energy efficiency and improve the output power adjustment effect of the photovoltaic-storage system.

[0082] Figure 3 is another flow schematic diagram of the photovoltaic-storage system control method shown in the embodiment of the present application. This embodiment further elaborates on the photovoltaic-storage system control method on the basis of the Figure 1 embodiment shown.

[0083] S310. Obtain the current working mode of the photovoltaic-storage system.

[0084] For the description of this step, please refer to the content described in step S110, and details are not described here again.

[0085] S320, according to the current working mode, when it is determined that the output port is outputting externally, a preset adjustment strategy is determined; the preset adjustment strategy includes: one of a first adjustment strategy and a second adjustment strategy.

[0086] Please refer to the description of step S120 for this step, which will not be repeated here.

[0087] S330, monitoring the switching state of the current working mode.

[0088] In this step, it is monitored whether the current working mode of the photovoltaic storage system is about to be switched.

[0089] The switching state may include: a switching mode state and a non-switching mode state. Specifically, the switching mode state means that the current working mode will be switched from the current working mode to the next working mode within a preset time; the non-switching mode state means that the current working mode remains the current working mode within a preset time.

[0090] In some implementations, monitoring the switching state of the current working mode may include the following steps: S331, obtaining the current working mode of the photovoltaic energy storage system, and monitoring at least one of a first monitoring parameter of the photovoltaic component, a second monitoring parameter of the output port, and a third monitoring parameter of the energy storage battery.

[0091] The first monitoring parameter of the photovoltaic component can be the real-time output power or real-time output voltage of the photovoltaic component, such as the real-time output power Ps and real-time output voltage Us of the photovoltaic component described above. It can be known that when the real-time output power or real-time output voltage of the photovoltaic component is greater than the preset photovoltaic start-up threshold, the photovoltaic component is qualified to generate electricity, otherwise, the photovoltaic component is not qualified to generate electricity. The second monitoring parameter of the output port can be the preset output power of the output port. It should be understood that the preset output power of the output port is the external preset output power of the photovoltaic storage system, that is, the preset output power corresponding to the load end of the photovoltaic storage system, such as the preset output power Pt set by the photovoltaic storage system described above. The third monitoring parameter of the energy storage battery can be the remaining battery capacity (power) of the energy storage battery. When the remaining battery capacity is greater than the preset battery allowable discharge capacity, the energy storage battery is qualified to generate electricity, otherwise, the energy storage battery is not qualified to generate electricity, or when the remaining battery capacity is less than the preset battery capacity, the energy storage battery stops generating electricity, and when the remaining battery capacity is less than the preset battery charging capacity, the energy storage battery needs to be charged.

[0092] In this step, the current working mode of the photovoltaic storage system is obtained, and at least one of the first monitoring parameter of the photovoltaic component, the second monitoring parameter of the output port, and the third monitoring parameter of the energy storage battery is monitored according to the working mode corresponding to the current working mode. It should be understood that the type and number of parameters to be monitored are different according to different current working modes.

[0093] In some embodiments, the photovoltaic storage system is provided with an initial working mode. The initial working mode of the photovoltaic storage system may be a standby mode. Specifically, when the current working mode of the photovoltaic storage system is the standby mode, the photovoltaic storage system is not working.

[0094] In some embodiments, the process of monitoring the corresponding parameter in the solar energy storage system maintains a preset time threshold, that is, the process of monitoring the switching state of the current working mode continues for a preset time threshold, for example, continuously monitoring the switching state of the current working mode within 2 seconds.

[0095] S332, when the monitoring result meets the preset condition, obtain the corresponding target working mode and determine that the switching state of the current working mode is the switching mode state, otherwise, determine that the switching state of the current working mode is the non-switching mode state.

[0096] In this step, corresponding monitoring results are obtained after monitoring corresponding parameters of the photovoltaic storage system. When the monitoring results meet the corresponding preset conditions, the corresponding target operating mode is obtained and the switching state of the current operating mode of the photovoltaic storage system is determined to be the switching mode state, that is, the current operating mode of the photovoltaic storage system is about to switch to the corresponding target operating mode. Otherwise, the switching state of the current operating mode is determined to be the non-switching mode state, and the current operating mode is kept unchanged.

[0097] In some embodiments, when the monitoring result satisfies the preset condition, obtaining the corresponding target working mode may include: when the monitoring result satisfies the preset condition, obtaining the target working mode that complies with the preset mode switching route. It is understood that the current working mode needs to switch to the next target working mode according to the preset switching route.

[0098] Figure 4 It is a schematic diagram of a mode switching route in a photovoltaic storage system control method shown in an embodiment of the present application.

[0099] See also Figure 4 As an example, the current working mode of the photovoltaic storage system of the present application may include standby mode, energy storage charging mode, charging and using mode, photovoltaic power supply mode, photovoltaic storage co-supply mode and energy storage power supply mode. Among them, the corresponding current working mode is as follows Figure 4 The arrow direction shown corresponds to switching to the next working mode. It can be seen that Figure 4The corresponding switching routes are shown as 1 to 14. In addition, please refer to the above-mentioned step 110 for the above six working modes, and the system working process corresponding to the working mode will not be described in detail here.

[0100] In order to facilitate further understanding of the monitoring process of the current working mode of the photovoltaic storage system of the present application, the following describes the process of switching the current working mode to the next corresponding working mode for the above six current working modes when the real-time output power or real-time output voltage of the photovoltaic module, the preset output power of the output port, and the remaining battery capacity of the energy storage battery meet the corresponding preset conditions respectively.

[0101] 1. The current working mode is standby mode (11) The real-time output power Ps or real-time output voltage Us of the photovoltaic module is greater than the preset photovoltaic start-up threshold, and the remaining battery capacity of the energy storage battery is less than the preset battery charging capacity, or the real-time output power Ps or real-time output voltage Us of the photovoltaic module is greater than the preset photovoltaic start-up threshold, and the preset output power Pt set by the photovoltaic storage system is zero, and the energy storage charging mode is entered according to the switching route 10; (12) When the real-time output power Ps or real-time output voltage Us of the photovoltaic module is greater than the preset photovoltaic start-up threshold, and the remaining battery capacity of the energy storage battery is greater than the preset battery allowable discharge capacity, and the preset output power Pt set by the photovoltaic storage system is greater than zero, the photovoltaic power supply mode is entered according to the switching route 12; (13) If the preset output power Pt set by the photovoltaic storage system is greater than zero, and the real-time output power Ps or real-time output voltage Us of the photovoltaic module is less than the preset photovoltaic start-up threshold, and the remaining battery capacity of the energy storage battery is greater than the preset battery allowable discharge capacity, the energy storage power supply mode is entered according to the switching route 14; Except for the above situations, the photovoltaic storage system maintains the current working mode as standby mode.

[0102] 2. The current working mode is energy storage charging mode (21) If the remaining battery capacity of the energy storage battery is greater than the preset allowable discharge capacity of the battery, and the preset output power Pt set by the photovoltaic storage system is greater than zero, the charging and using mode is entered according to the switching route 1; (22) The real-time output power Ps or real-time output voltage Us of the PV module is less than the preset PV startup threshold, and the preset output power Pt set by the PV storage system is zero, or the remaining battery capacity of the energy storage battery is fully charged, and the preset output power Pt set by the PV storage system is zero, and the switch route 9 enters the standby mode; Except for the above situations, the photovoltaic storage system maintains the current working mode as energy storage charging mode.

[0103] 3. The current working mode is charging and using mode (31) If the remaining battery capacity of the energy storage battery is fully charged, or the maximum value of the real-time output power Ps of the photovoltaic module is less than the preset output power Pt set by the photovoltaic storage system, and the remaining battery capacity of the energy storage battery is greater than the preset battery allowable discharge capacity, the photovoltaic power supply mode is entered according to the switching route 2; (32) When the preset output power Pt set by the photovoltaic energy storage system is zero, or the real-time output power Ps or real-time output voltage Us of the photovoltaic module is less than the preset photovoltaic start-up threshold, and the remaining battery capacity of the energy storage battery is not fully charged, the energy storage charging mode is entered according to the switching route 8; Except for the above situations, the solar energy storage system maintains the current working mode of charging and using.

[0104] 4. The current working mode is photovoltaic power supply mode (41) When the maximum value of the real-time output power Ps of the photovoltaic module is less than the preset output power Pt set by the photovoltaic storage system, and the remaining battery capacity of the energy storage battery is greater than the preset battery allowable discharge capacity, the photovoltaic storage co-supply mode is entered according to the switching route 3; (42) When the maximum value of the real-time output power Ps of the photovoltaic module is less than the preset output power Pt set by the photovoltaic storage system, and the remaining battery capacity of the energy storage battery is not fully charged, the charging and using mode is entered according to the switching route 7; (43) When the real-time output power Ps or real-time output voltage Us of the photovoltaic module is less than the preset photovoltaic start-up threshold, and the preset output power Pt set by the photovoltaic storage system is zero or the remaining battery capacity of the energy storage battery is less than the preset battery allowable discharge capacity, the switch route 11 is followed to enter the standby mode; Except for the above situations, the photovoltaic storage system maintains the current working mode as photovoltaic power supply mode.

[0105] 5. The current working mode is the photovoltaic and storage co-supply mode (51) When the real-time output power or real-time output voltage of the photovoltaic module is less than the preset photovoltaic start-up threshold, the energy storage power supply mode is entered according to the switching route 4; (52) If the maximum value of the real-time output power Ps of the photovoltaic module is greater than the preset output power Pt set by the photovoltaic storage system, or the remaining battery capacity of the energy storage battery is less than the preset battery allowable discharge capacity, the photovoltaic power supply mode is entered according to the switching route 6; Except for the above situations, the photovoltaic storage system maintains the current working mode as the photovoltaic storage co-supply mode.

[0106] 6. The current working mode is energy storage power supply mode (61) When the real-time output power or real-time output voltage of the photovoltaic module is greater than the preset photovoltaic start-up threshold, the energy storage power supply mode is entered according to the switching route 5; (62) The preset output power Pt set by the photovoltaic storage system is zero, or the remaining battery capacity of the energy storage battery is less than the preset battery capacity, and the switch route 13 enters the standby mode; Except for the above situations, the photovoltaic storage system maintains the current working mode as the energy storage power supply mode.

[0107] The present application adopts the above strategies to monitor the above six working modes respectively and switches to the next working mode according to the corresponding switching route when the preset conditions are met, that is, obtains the target working mode.

[0108] In some implementations, a jitter filtering mechanism is set to perform data jitter filtering on corresponding parameters during monitoring, so as to reduce frequent switching between modes caused by data jitter. The jitter filtering mechanism is set using relevant technologies and is not limited here.

[0109] According to the switching state of the current working mode obtained in step S330, the following steps S340 or S350 are executed accordingly.

[0110] S340: When the switching state of the current working mode is determined to be a non-switching mode state, parameters of the power control module are controlled according to a preset adjustment strategy.

[0111] In this step, when it is determined that the current working mode does not switch, the power control module is parameter controlled according to the preset adjustment strategy corresponding to the current working mode. Figure 2 The relevant contents of parameter control of the power control module in the illustrated embodiment will not be described in detail here.

[0112] S350, when the switching state of the current working mode is determined to be the switching mode state, after executing the switching of the current working mode, re-acquire the preset adjustment strategy corresponding to the current working mode and perform parameter control on the power control module according to the preset adjustment strategy.

[0113] In this step, when it is determined that the current working mode needs to be switched, the current working mode is switched according to the acquired target working mode, and steps S310 to S330 are re-executed to enable the photovoltaic storage system after switching the working mode to re-acquire the preset adjustment strategy and perform parameter control on the power control module according to the preset adjustment strategy.

[0114] In this embodiment, the technical solution of the present application, before executing the adjustment strategy for the system, also monitors whether the system has the need to switch the working mode, so as to improve the accuracy of automatic adjustment of the output power of the photovoltaic storage system, and by setting a fixed switching route, smooth switching between multiple working modes is achieved, effectively improving the stability of the photovoltaic storage system's working mode switching process.

[0115] Corresponding to the aforementioned application function implementation method embodiment, the present application also provides a photovoltaic storage system control device, an electronic device and corresponding embodiments.

[0116] Figure 5 It is a structural schematic diagram of a photovoltaic storage system control device shown in an embodiment of the present application.

[0117] See also Figure 5 , the photovoltaic storage system control device of the present application, wherein the photovoltaic storage system includes: a power control module and an output port, the power control module is used to control the power transmission between the photovoltaic components and the energy storage battery and the output port respectively, and the photovoltaic storage system control device 400 includes: a mode determination module 410, a strategy acquisition module 420 and a parameter adjustment module 430.

[0118] The mode determination module 410 is used to obtain the current working mode of the system.

[0119] The strategy acquisition module 420 is used to determine a preset adjustment strategy according to the current working mode when determining that the output port is outputting externally; the preset adjustment strategy includes: one of a first adjustment strategy and a second adjustment strategy.

[0120] In some embodiments, the strategy acquisition module 420 is used to determine the preset adjustment strategy according to the current working mode when it is determined that the output port is outputting to the outside, which may include: according to the current working mode, when it is determined that the output port is outputting to the outside and the energy storage battery is charging, or when it is determined that the output port is outputting to the outside and the energy storage battery is not working, determining the first adjustment strategy as the preset adjustment strategy; or, when it is determined that the output port is outputting to the outside and the energy storage battery is discharging to the outside, determining the second adjustment strategy as the preset adjustment strategy.

[0121] The parameter adjustment module 430 is used to perform parameter control on the power control module according to a preset adjustment strategy so that the efficiency point position obtained in the PV curve according to the photovoltaic components and / or the energy storage battery approaches or is equal to the maximum efficiency point position.

[0122] Figure 6 It is another structural schematic diagram of the photovoltaic storage system control device shown in an embodiment of the present application.

[0123] See also Figure 6 The photovoltaic storage system control device 400 includes: a mode determination module 410, a strategy acquisition module 420, a parameter adjustment module 430, a state monitoring module 440 and a mode switching module 450. The parameter adjustment module 430 includes: a first control module 431 and a second control module 432.

[0124] The state monitoring module 440 is used to monitor the switching state of the current working mode before the parameter adjustment module 430 performs parameter control on the power control module according to the preset adjustment strategy. When the switching state of the current working mode is determined to be a non-switching mode state, the parameter adjustment module 430 performs parameter control on the power control module according to the preset adjustment strategy.

[0125] In some implementations, the state monitoring module 440 includes: a parameter monitoring module 441 and a state determination module 442 .

[0126] The parameter monitoring module 441 is used to obtain the current working mode of the photovoltaic storage system and monitor at least one of the first monitoring parameter of the photovoltaic component, the second monitoring parameter of the output port, and the third monitoring parameter of the energy storage battery.

[0127] The state determination module 442 is used to obtain the corresponding target working mode and determine the switching state of the current working mode as the switching mode state when the monitoring result meets the preset conditions, otherwise, determine the switching state of the current working mode as the non-switching mode state.

[0128] In some implementations, when the monitoring result meets a preset condition, the state determination module 442 obtains a target operating mode that complies with a preset mode switching route.

[0129] The mode switching module 450 is used to reacquire the preset adjustment strategy corresponding to the current working mode and perform parameter control on the power control module according to the preset adjustment strategy after executing the current working mode switching when the switching state of the current working mode is determined to be the switching mode state.

[0130] The first control module 431 is used to obtain the first power parameter of the photovoltaic component and the second power parameter of the output port when the preset adjustment strategy is determined to be the first adjustment strategy, and calculate the first efficiency point position in the PV curve with the first power parameter of the photovoltaic component; according to the first efficiency point position and the second power parameter, adjust the power control module to make the first efficiency point position move toward the maximum efficiency point position.

[0131] The second control module 432 is used to obtain the first power parameter of the photovoltaic component, the third power parameter of the energy storage battery, and the second power parameter of the output port when the preset adjustment strategy is determined to be the second adjustment strategy, and calculate the second efficiency point position in the PV curve with the first power parameter of the photovoltaic component and the third power parameter of the energy storage battery; or, obtain the third power parameter of the energy storage battery and the second power parameter of the output port, and calculate the third efficiency point position in the PV curve with the third power parameter of the energy storage battery; according to the second efficiency point position or the third efficiency point position, and the second power parameter, adjust the power control module to make the second efficiency point position or the third efficiency point position move toward the maximum efficiency point position.

[0132] In this embodiment, the technical solution of the present application obtains a preset adjustment strategy to control the parameters of the power control module when the photovoltaic storage system outputs externally, and automatically adjusts the output power of the photovoltaic storage system so that the efficiency point position of the photovoltaic storage system in the PV curve approaches or is equal to the maximum efficiency point position, thereby improving the energy conversion efficiency of the photovoltaic system and reducing the user's electricity costs.

[0133] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated again here.

[0134] Figure 7 It is a schematic diagram of the structure of an electronic device shown in an embodiment of the present application.

[0135] See also Figure 7 , the electronic device 1000 includes a memory 1010 and a processor 1020 .

[0136] The processor 1020 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

[0137] The memory 1010 may include various types of storage units, such as system memory, read-only memory (ROM), and permanent storage devices. Among them, ROM can store static data or instructions required by the processor 1020 or other modules of the computer. The permanent storage device may be a readable and writable storage device. The permanent storage device may be a non-volatile storage device that does not lose the stored instructions and data even after the computer is powered off. In some embodiments, the permanent storage device uses a large-capacity storage device (such as a magnetic or optical disk, flash memory) as a permanent storage device. In some other embodiments, the permanent storage device may be a removable storage device (such as a floppy disk, optical drive). The system memory may be a readable and writable storage device or a volatile readable and writable storage device, such as a dynamic random access memory. The system memory may store some or all instructions and data required by the processor at run time. In addition, the memory 1010 may include any combination of computer-readable storage media, including various types of semiconductor storage chips (such as DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), and disks and / or optical disks may also be used. In some embodiments, the memory 1010 may include a readable and / or writable removable storage device, such as a laser disc (CD), a read-only digital versatile disc (such as a DVD-ROM, a double-layer DVD-ROM), a read-only Blu-ray disc, an ultra-density optical disc, a flash memory card (such as an SD card, a mini SD card, a Micro-SD card, etc.), a magnetic floppy disk, etc. The computer-readable storage medium does not include carrier waves and transient electronic signals transmitted wirelessly or wired.

[0138] The memory 1010 stores executable codes, and when the executable codes are processed by the processor 1020 , the processor 1020 can execute part or all of the methods described above.

[0139] In addition, the method according to the present application may also be implemented as a computer program or a computer program product, which includes computer program code instructions for executing some or all of the steps in the above method of the present application.

[0140] Alternatively, the present application can also be implemented as a computer-readable storage medium (or non-transitory machine-readable storage medium or machine-readable storage medium) on which executable code (or computer program or computer instruction code) is stored. When the executable code (or computer program or computer instruction code) is executed by a processor of an electronic device (or server, etc.), the processor executes part or all of the steps of the above-mentioned method according to the present application.

[0141] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A method for controlling a photovoltaic storage system, characterized in that: The photovoltaic storage system includes: a power control module and an output port, wherein the power control module is used to control the power transmission between the photovoltaic module and the energy storage battery and the output port respectively, including: Get the current working mode of the solar storage system; According to the current working mode, when it is determined that the output port is outputting externally, a preset adjustment strategy is determined; the preset adjustment strategy includes: one of a first adjustment strategy and a second adjustment strategy; The power control module is parameter-controlled according to the preset adjustment strategy so that the efficiency point position obtained according to the photovoltaic component and / or the energy storage battery in the PV curve approaches or is equal to the maximum efficiency point position.

2. The method according to claim 1, characterized in that According to the current working mode, when it is determined that the output port is outputting externally, determining a preset adjustment strategy includes: According to the current working mode, when it is determined that the output port is outputting to the outside and the energy storage battery is charging, or when it is determined that the output port is outputting to the outside and the energy storage battery is not working, determining the first adjustment strategy as the preset adjustment strategy; or When it is determined that the output port outputs externally and the energy storage battery discharges externally, the second adjustment strategy is determined to be the preset adjustment strategy.

3. The method according to claim 2, characterized in that The performing parameter control on the power control module according to the preset adjustment strategy includes: When the preset adjustment strategy is determined to be the first adjustment strategy, a first power parameter of the photovoltaic component and a second power parameter of the output port are obtained, and a first efficiency point position in a PV curve is calculated using the first power parameter of the photovoltaic component; According to the first efficiency point position and the second power parameter, the power control module is adjusted to move the first efficiency point position toward the maximum efficiency point position; or, When the preset adjustment strategy is determined to be the second adjustment strategy, the first power parameter of the photovoltaic component, the third power parameter of the energy storage battery, and the second power parameter of the output port are obtained, and the second efficiency point position in the PV curve is calculated with the first power parameter of the photovoltaic component and the third power parameter of the energy storage battery; or, the third power parameter of the energy storage battery and the second power parameter of the output port are obtained, and the third efficiency point position in the PV curve is calculated with the third power parameter of the energy storage battery; according to the second efficiency point position or the third efficiency point position, and the second power parameter, the power control module is adjusted to make the second efficiency point position or the third efficiency point position move toward the maximum efficiency point position.

4. The method according to claim 1, characterized in that: Before performing parameter control on the power control module according to the preset adjustment strategy, the method further includes: Monitoring the switching state of the current working mode; The performing parameter control on the power control module according to the preset adjustment strategy includes: When the switching state of the current working mode is determined to be a non-switching mode state, the power control module is parameter controlled according to the preset adjustment strategy.

5. The method according to claim 4, characterized in that The method further includes: When the switching state of the current working mode is determined to be the switching mode state, after executing the switching of the current working mode, the preset adjustment strategy corresponding to the current working mode is re-acquired and the parameters of the power control module are controlled according to the preset adjustment strategy.

6. The method according to any one of claims 4 or 5, characterized in that: The monitoring of the switching state of the current working mode includes: Acquire the current working mode of the photovoltaic storage system, and monitor at least one of a first monitoring parameter of the photovoltaic component, a second monitoring parameter of the output port, and a third monitoring parameter of the energy storage battery; When the monitoring result meets the preset condition, the corresponding target working mode is obtained and the switching state of the current working mode is determined to be the switching mode state, otherwise, the switching state of the current working mode is determined to be the non-switching mode state.

7. The method according to claim 6, characterized in that When the monitoring result meets the preset condition, the corresponding target working mode is obtained, including: When the monitoring result meets the preset conditions, the target working mode that meets the preset mode switching route is obtained.

8. A control device for a photovoltaic storage system, characterized in that: The photovoltaic storage system includes: a power control module and an output port, wherein the power control module is used to control the power transmission between the photovoltaic module and the energy storage battery and the output port respectively, including: A mode determination module is used to obtain the current working mode of the system; A strategy acquisition module, configured to determine a preset adjustment strategy according to the current working mode when determining that the output port is outputting externally; the preset adjustment strategy includes: one of a first adjustment strategy and a second adjustment strategy; and The parameter adjustment module is used to perform parameter control on the power control module according to the preset adjustment strategy so that the efficiency point position obtained in the PV curve according to the photovoltaic component and / or the energy storage battery approaches or is equal to the maximum efficiency point position.

9. An electronic device, characterized in that: include: processor; as well as A memory having executable codes stored thereon, which, when executed by the processor, causes the processor to execute the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having executable code stored thereon, characterized in that: When the executable code is executed by a processor of an electronic device, the processor is caused to execute the method as claimed in any one of claims 1 to 7.

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