Control method of power generation system, power generation system and grid connection point power regulation system

Abstract

The present application discloses a control method for a power generation system, a power generation system and a grid connection point power regulation system, and belongs to the technical field of power generation systems. The control method of the power generation system comprises: obtaining a received mode switching instruction and the working mode of the power generation system at the current acquisition moment; the working mode comprises: grid-connected mode or off-grid mode; when the mode switching instruction is to switch to the off-grid mode and the working mode is the grid-connected mode, the power generation system is switched to the off-grid mode based on the grid connection point power of the grid connection point corresponding to the power grid. The control method of the power generation system of the present application alleviates the problem that the output power of the power generation system is insufficient to support the load, causing the load to shut down, and does not need to be equipped with high-power photovoltaic modules and energy storage batteries, thereby reducing costs, reducing the occurrence of power generation system failures, extending the service life of the power generation system, and improving user experience.

Description

Technical Field

[0001] The present application belongs to the technical field of power generation systems, and in particular, relates to a control method for a power generation system, a power generation system, and a grid-connected point power regulation system. Background Art

[0002] The power generation system can switch from the grid-connected mode to the off-grid mode, and can also switch from the off-grid mode to the grid-connected mode. In the related art, when the power grid is powered off, the power generation system can switch from the grid-connected mode to the off-grid mode. The user can also actively set the power generation system to the off-grid mode to switch the power generation system from the grid-connected mode to the off-grid mode. However, the above switching method requires the configuration of high-power photovoltaic modules and energy storage batteries, which is costly and easily causes power generation system failures. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the related technologies. To this end, the present application proposes a control method for a power generation system, a power generation system and a grid connection point power regulation system to alleviate the problem that the output power of the power generation system is insufficient to support the load, causing the load to shut down, and does not require the use of high-power photovoltaic modules and energy storage batteries, thereby reducing costs, reducing the occurrence of power generation system failures, extending the service life of the power generation system, and improving the user experience.

[0004] In a first aspect, the present application provides a control method for a power generation system, wherein the power generation system includes at least one photovoltaic storage system, the power generation system is electrically connected to at least one load, and the power generation system is used to be electrically connected to a power grid; the method includes:

[0005] Acquire the received mode switching instruction and the working mode of the power generation system at the current acquisition time; the working mode includes: grid-connected mode or off-grid mode;

[0006] When the mode switching instruction is to switch to the off-grid mode and the working mode is the grid-connected mode, the power generation system is switched to the off-grid mode based on the acquired grid-connected point power of the grid-connected point corresponding to the power grid.

[0007] According to the control method of the power generation system of the present application, by obtaining the mode switching instruction and the working mode of the power generation system, it is determined whether the power generation system needs to be switched from the grid-connected mode to the off-grid mode. In the case where it is necessary to switch from the grid-connected mode to the off-grid mode, it is further determined whether the switching is allowed based on the grid connection point power, thereby alleviating the problem that the output power of the power generation system is insufficient to support the load, causing the load to shut down. There is no need to be equipped with high-power photovoltaic modules and energy storage batteries, which reduces costs, reduces the occurrence of power generation system failures, extends the service life of the power generation system, and improves user experience.

[0008] According to the control method of the power generation system of the present application, switching the power generation system to the off-grid mode based on the acquired grid connection point power of the grid connection point corresponding to the power grid includes:

[0009] When the grid-connected point power is greater than a target threshold, the power generation system is switched to the off-grid mode.

[0010] According to the control method of the power generation system of the present application, the power generation system is switched to the off-grid mode based on the acquired grid connection point power of the grid connection point corresponding to the grid, and further includes:

[0011] When the grid connection point power is not greater than the target threshold, outputting first prompt information, wherein the first prompt information is used to instruct the user to cut off part of the at least one load;

[0012] After the user cuts off the part of the load, obtaining new grid-connected point power;

[0013] When the power of the new grid-connected point is greater than the target threshold, the power generation system is switched to the off-grid mode.

[0014] According to the control method of the power generation system of the present application, the grid connection point power is obtained based on the following steps:

[0015] Determining the output power of the power generation system based on the output power corresponding to each of the photovoltaic storage systems included in the power generation system;

[0016] The grid connection point power is obtained based on the output power of the power generation system and the total power of the at least one load.

[0017] According to the control method of the power generation system of the present application, the grid connection point power is obtained based on the following steps:

[0018] Based on a power tracking threshold, adjusting the power of the grid connection point;

[0019] After the target time period, the adjusted grid connection point power is obtained.

[0020] The control method of the power generation system according to the present application is applied to a grid connection point power regulation system, the grid connection point power regulation system comprising: at least one first sub-subtractor, a power control circuit, a second subtractor and a current control circuit, the output end of each of the first subtractors is connected to the input end of the power control circuit, the output end of the power control circuit is connected to the input end of the second subtractor, and the output end of the second subtractor is connected to the current control circuit; the power tracking threshold is used to adjust the grid connection point power, including:

[0021] Acquiring actual electrical signals of each of the photovoltaic storage systems included in the power generation system;

[0022] Based on the power tracking threshold and the grid connection point power, obtaining a first difference signal output by a target first sub-subtractor in the at least one first sub-subtractor;

[0023] Based on the first difference signal, obtaining a current reference signal output by the power control circuit;

[0024] Based on the current reference signal and the actual electrical signal of each of the photovoltaic storage systems included in the power generation system, obtaining a second difference signal output by the second subtractor;

[0025] Based on the second difference signal, obtaining a regulating signal output by the current control circuit;

[0026] Based on the adjustment signal, the grid connection point power is adjusted.

[0027] According to the control method of the power generation system of the present application, after acquiring the received mode switching instruction and the working mode of the power generation system at the current acquisition moment, the method further includes:

[0028] When the mode switching instruction is to switch to the off-grid mode and the working mode is the off-grid mode, the power generation system maintains the off-grid mode.

[0029] According to the control method of the power generation system of the present application, after acquiring the received mode switching instruction and the working mode of the power generation system at the current acquisition moment, the method further includes:

[0030] When the mode switching instruction is to switch to the grid-connected mode and the working mode is the grid-connected mode, the power generation system maintains the grid-connected mode.

[0031] According to the control method of the power generation system of the present application, after acquiring the received mode switching instruction and the working mode of the power generation system at the current acquisition moment, the method further includes:

[0032] When the mode switching instruction is to switch to the grid-connected mode and the working mode is the off-grid mode, the power generation system is switched to the grid-connected mode.

[0033] In a second aspect, the present application provides a control device for a power generation system, wherein the power generation system includes at least one photovoltaic storage system, the power generation system is electrically connected to at least one load, and the power generation system is used to be electrically connected to a power grid; the device includes:

[0034] A first processing module is used to obtain the received mode switching instruction and the working mode of the power generation system at the current acquisition time; the working mode includes: grid-connected mode or off-grid mode;

[0035] The second processing module is used to switch the power generation system to the off-grid mode based on the grid connection point power obtained from the grid connection point corresponding to the power grid when the mode switching instruction is to switch to the off-grid mode and the working mode is the grid-connected mode.

[0036] According to the control device of the power generation system of the present application, by obtaining the mode switching instruction and the working mode of the power generation system, it is determined whether the power generation system needs to be switched from the grid-connected mode to the off-grid mode. In the case where it is necessary to switch from the grid-connected mode to the off-grid mode, it is further determined whether the switching is allowed based on the grid connection point power, thereby alleviating the problem that the output power of the power generation system is insufficient to support the load, causing the load to shut down. There is no need to be equipped with high-power photovoltaic modules and energy storage batteries, which reduces costs, reduces the occurrence of power generation system failures, extends the service life of the power generation system, and improves user experience.

[0037] In a third aspect, the present application provides a power generation system, comprising:

[0038] at least one solar storage system;

[0039] The power generation system switches the working mode based on the control method of the power generation system as described in the first aspect.

[0040] In a fourth aspect, the present application provides a grid-connected point power regulation system based on the control method of the power generation system as described in the first aspect, comprising:

[0041] at least one first sub-subtractor;

[0042] A power control circuit, wherein the output end of each of the first sub-subtractors is respectively connected to the input end of the power control circuit;

[0043] a second subtractor, wherein an input terminal of the second subtractor is connected to an output terminal of the power control circuit;

[0044] A current control circuit, wherein the input end of the current control circuit is connected to the output end of the second subtractor, and the output end of the current control circuit outputs a regulating signal, wherein the regulating signal is used to regulate the grid connection point power.

[0045] In a fifth aspect, the present application provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the control method of the power generation system as described in the first aspect above is implemented.

[0046] In a sixth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the control method of the power generation system as described in the first aspect above.

[0047] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0048] By obtaining the mode switching instruction and the working mode of the power generation system, it is determined whether the power generation system needs to be switched from the grid-connected mode to the off-grid mode. If it is necessary to switch from the grid-connected mode to the off-grid mode, it is further determined whether the switching is allowed based on the grid-connected point power, thereby alleviating the problem that the output power of the power generation system is insufficient to support the load, causing the load to shut down. There is no need to equip high-power photovoltaic modules and energy storage batteries, which reduces costs, reduces the occurrence of power generation system failures, extends the service life of the power generation system, and improves user experience.

[0049] Furthermore, by determining that the power of the grid-connected point is not greater than the target threshold, it is determined that the power generation system cannot support the load, and the user is prompted to turn off part of the load so that the power generation system can support the remaining load, thereby switching the power generation system to off-grid mode. The control method is flexible and can be flexibly adjusted in combination with actual application scenarios. It is highly flexible and improves user experience.

[0050] Furthermore, by adjusting the grid connection point power so that the grid connection point power is tracked to a value as close to the power tracking threshold as possible, and by adjusting the grid connection point power to a value greater than the target threshold as much as possible, the frequency of the load supported by the output power of the power generation system is increased, thereby increasing the probability of allowing the power generation system to switch to off-grid mode and improving the user experience.

[0051] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0053] Figure 1 It is one of the flow charts of the control method of the power generation system provided in the embodiment of the present application;

[0054] Figure 2 This is a second flow chart of a control method for a power generation system provided in an embodiment of the present application;

[0055] Figure 3 It is one of the principle schematic diagrams of the control method of the power generation system provided in the embodiment of the present application;

[0056] Figure 4 This is the second principle schematic diagram of the control method of the power generation system provided in the embodiment of the present application;

[0057] Figure 5 This is a third flow chart of the control method of the power generation system provided in the embodiment of the present application;

[0058] Figure 6 It is one of the structural schematic diagrams of the power generation system provided in the embodiment of the present application;

[0059] Figure 7 This is the second structural schematic diagram of the power generation system provided in the embodiment of the present application;

[0060] Figure 8 It is one of the structural schematic diagrams of the grid connection point power regulation system provided in the embodiment of the present application;

[0061] Fig. 9 This is the second structural diagram of the grid connection point power regulation system provided in the embodiment of the present application;

[0062] Fig.10 is a schematic diagram of the structure of a control device for a power generation system provided in an embodiment of the present application;

[0063] Fig.11 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0064] Reference numerals:

[0065] First sub-subtractor 801; power control circuit 802; second subtractor 803;

[0066] Current control circuit 804. DETAILED DESCRIPTION

[0067] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0068] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0069] In combination with the accompanying drawings, the control method of the power generation system, the control device of the power generation system, the power generation system, the grid-connected point power regulation system and the readable storage medium provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0070] The control method of the power generation system may be applied to a terminal, and may be specifically executed by hardware or software in the terminal.

[0071] The terminal includes but is not limited to portable communication devices such as mobile phones or tablet computers. It should also be understood that in some embodiments, the terminal may not be a portable communication device, but a desktop computer.

[0072] In the following various embodiments, a terminal including a display and a touch-sensitive surface is described. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, a mouse and a joystick.

[0073] The control method for a power generation system provided in an embodiment of the present invention may be executed by the power generation system, or may be a control device of the power generation system disposed on the power generation system, or may be a server electrically connected (wired or wirelessly connected) to the power generation system, or may be a user terminal communicatively connected to the power generation system, including but not limited to a mobile terminal and a non-mobile terminal.

[0074] like Figure 1 As shown, the control method of the power generation system includes: step 110 and step 120.

[0075] The power generation system includes at least one photovoltaic storage system.

[0076] The power generation system is electrically connected to at least one load, and the power generation system is used to be electrically connected to a power grid.

[0077] At least one load is a local load.

[0078] The number of loads connected to the power generation system can be determined based on actual conditions and is not limited in this application.

[0079] like Figure 6 As shown, the power generation system may include a photovoltaic storage system.

[0080] The power generation system can also be connected to the grid through loads.

[0081] The power generation system and the grid can jointly supply power to the load.

[0082] like Figure 7 As shown, the power generation system may also include multiple photovoltaic storage systems.

[0083] The photovoltaic storage systems can be connected in parallel.

[0084] Each photovoltaic storage system is electrically connected to at least one load.

[0085] Step 110, obtaining the received mode switching instruction and the working mode of the power generation system at the current acquisition time;

[0086] In this step, the mode switching instruction is an instruction issued by the user to switch the working mode of the power generation system.

[0087] The working mode is the possible mode when the power generation system is in working state.

[0088] The working modes include: grid-connected mode or off-grid mode.

[0089] In the actual execution process, after receiving the mode switching instruction from the user, it indicates that the user needs to actively switch the working mode of the power generation system. At this time, the working mode of the power generation system at the current collection moment can be further obtained.

[0090] Step 120: When the mode switching instruction is to switch to the off-grid mode and the working mode is the grid-connected mode, the power generation system is switched to the off-grid mode based on the acquired grid-connected point power of the grid-connected point corresponding to the grid.

[0091] In this step, switching to the off-grid mode is to switch the power generation system from the working mode at the current collection moment to the off-grid mode.

[0092] The grid connection point is the connection point where distributed power sources are connected to the power grid.

[0093] In some embodiments, the power generation system may automatically switch from a grid-connected mode to an off-grid mode during a power outage in the grid.

[0094] In other embodiments, the user may also actively switch the power generation system from the grid-connected mode to the off-grid mode.

[0095] During the actual execution process, after receiving the mode switching instruction to switch to the off-grid mode issued by the user, the working mode of the power generation system at the current collection moment can be further obtained. When the power generation system needs to switch the working mode, it can be further confirmed based on the grid-connected point power whether the power generation system is allowed to switch to the off-grid mode. When the grid-connected point power meets certain requirements, the power generation system is switched to the off-grid mode.

[0096] During the research and development process, the inventors discovered that when the user actively sets the working mode of the power generation system to the off-grid mode, each photovoltaic storage system in the power generation system is required to supply power to the load; however, when the load has a high power demand, the output power of the power generation system may not be able to support the load, resulting in power loss of the load. In the related art, the cost is mainly increased by equipping photovoltaic modules and energy storage systems with power greater than the load power, and in the case of unstable light, the power generation system may fail.

[0097] The present application obtains the received mode switching instruction and the working mode of the power generation system at the current collection moment to determine whether the power generation system needs to be switched from the grid-connected mode to the off-grid mode. If switching is required, it is further determined whether the switching conditions are met based on the power of the grid-connected point. If the switching conditions are met, the power generation system is switched to the off-grid mode, thereby reducing the frequency of load shutdown caused by the output power of the power generation system being insufficient to support the load after the power generation system is switched from the grid-connected mode to the off-grid mode. There is no need to be equipped with high-power photovoltaic modules and energy storage batteries, thereby reducing costs and reducing the occurrence of power generation system failures.

[0098] According to the control method of the power generation system provided in the present application, by obtaining the mode switching instruction and the working mode of the power generation system, it is determined whether the power generation system needs to be switched from the grid-connected mode to the off-grid mode. When it is necessary to switch from the grid-connected mode to the off-grid mode, it is further determined whether the switching is allowed based on the grid connection point power, thereby alleviating the problem that the output power of the power generation system is insufficient to support the load, causing the load to shut down. There is no need to be equipped with high-power photovoltaic modules and energy storage batteries, which reduces costs, reduces the occurrence of power generation system failures, extends the service life of the power generation system, and improves user experience.

[0099] like Figure 2 As shown, in some embodiments, step 120 may also include:

[0100] When the power at the grid-connected point is greater than the target threshold, the power generation system is switched to off-grid mode.

[0101] In this embodiment, the target threshold is a preset value for determining whether the load can operate stably off-grid.

[0102] The specific value of the target threshold can be determined based on actual conditions. For example, the target threshold can be 0 or 1, which is not limited in this application.

[0103] In the actual implementation process, the correlation between the grid-connected point power and the target threshold can be used to determine whether the load can operate stably in the off-grid mode.

[0104] like Figure 3 As shown, taking the target threshold as 0 as an example, when the grid connection point power is greater than 0, the power of the power generation system flows from the power generation system to the load and the grid connection point. When the power of the power generation system meets the load demand, it can also flow to the grid connection point.

[0105] like Figure 2 As shown, after determining that a mode switching instruction to switch to an off-grid mode is received from a user, it is further determined whether the power generation system is in an off-grid mode. When the power generation system is not in an off-grid mode, it is determined whether the power generation system can support the load through the correlation between the grid-connected point power and the target threshold. When the power generation system can support the load, the grid-connected mode switch is disconnected through the off-grid switching device to switch the power generation system to an off-grid mode.

[0106] According to the control method of the power generation system provided in the embodiment of the present application, by determining that the power of the grid-connected point is greater than the target threshold, it is determined that the power generation system can support the load. When the power generation system can support the load, the power generation system is allowed to be switched to the off-grid mode, thereby reducing the situation where the power generation system cannot support the load and shuts down due to failure after switching to the off-grid mode, thereby extending the service life of the power generation system.

[0107] Continue to refer Figure 2 In some embodiments, step 120 may further include:

[0108] When the power of the grid connection point is not greater than the target threshold, outputting a first prompt message;

[0109] After the user cuts off part of the load, obtain new grid-connected power;

[0110] When the power of the new grid-connected point is greater than the target threshold, the power generation system is switched to off-grid mode.

[0111] In this embodiment, the first prompt information is used to instruct the user to cut off part of the at least one load.

[0112] Part of the load may be user-defined or determined based on actual conditions, and this application does not limit this.

[0113] like Figure 4As shown, taking the target threshold value of 0 as an example, when the grid-connected point power is not greater than 0, the power of the power generation system flows to each load. In addition, the grid-connected point power also needs to flow to the load for use by the load.

[0114] Continue to refer Figure 2 When it is determined through the correlation between the grid-connected point power and the target threshold that the power generation system cannot support the load, a first prompt message may be output, such as "the main body load is too heavy, please cut off part of the load".

[0115] After the user cuts off part of the load, a new grid-connected point power is obtained. When the new grid-connected point power is greater than the target threshold, the grid-connected mode switch is disconnected through the grid-connected and off-grid switching device to switch the power generation system to the off-grid mode.

[0116] According to the control method of the power generation system provided in the embodiment of the present application, by determining that the power of the grid connection point is not greater than the target threshold, it is determined that the power generation system cannot support the load, and the user is prompted to turn off part of the load so that the power generation system can support the remaining load, thereby switching the power generation system to an off-grid mode. The control method is flexible and can be flexibly adjusted in combination with actual application scenarios. It is highly flexible and improves user experience.

[0117] In some embodiments, the grid connection point power can be obtained based on the following steps:

[0118] Determining the output power of the power generation system based on the output power corresponding to each photovoltaic storage system included in the power generation system;

[0119] The grid connection point power is obtained based on the output power of the power generation system and the total power of at least one load.

[0120] In this embodiment, it can be understood that the output powers corresponding to the various photovoltaic storage systems may be the same or different.

[0121] The output power of the power generation system is the sum of the output powers of each photovoltaic storage system.

[0122] like Figure 6 As shown, in the case where the power generation system includes a photovoltaic storage system, the correlation between the output power of the power generation system, the power corresponding to each load and the power of the grid connection point can be determined based on the following formula.

[0123]

[0124] in, The output power of the power generation system; is the power corresponding to the first load; is the power corresponding to the second load; is the grid-connected point power.

[0125] In the actual implementation process, the power of the grid connection point can be determined through the above-mentioned association relationship.

[0126] Taking the target threshold as 0 as an example, the power at the grid connection point is greater than 0, that is, In the case of , there is the following correlation between the grid connection point power, the output power of the power generation system, and the power corresponding to each load:

[0127]

[0128] in, The output power of the power generation system; is the power corresponding to the first load; is the power corresponding to the second load.

[0129] It is understandable that in In this case, the output power of the power generation system can support the load, allowing the power generation system to be switched to off-grid mode.

[0130] When the power at the grid connection point is not greater than 0, that is, In the case of , there is the following correlation between the grid connection point power, the output power of the power generation system, and the power corresponding to each load:

[0131]

[0132] in, The output power of the power generation system; is the power corresponding to the first load; is the power corresponding to the second load.

[0133] It is understandable that in In the case of a power outage, the output power of the power generation system cannot support the load. In this case, it is not allowed to switch the power generation system to off-grid mode.

[0134] like Figure 7 As shown, in the case where the power generation system includes multiple photovoltaic storage systems, the correlation between the output power of the power generation system, the power corresponding to each load and the grid connection point power can be determined based on the following formula.

[0135]

[0136] in, is the output power corresponding to the i-th photovoltaic storage system; is the power corresponding to the first load; is the power corresponding to the second load; is the grid-connected point power.

[0137] Taking the target threshold as 0 as an example, the power at the grid connection point is greater than 0, that is, In the case of , there is the following correlation between the grid connection point power, the output power of the power generation system, and the power corresponding to each load:

[0138]

[0139] in, is the output power corresponding to the i-th photovoltaic storage system; is the power corresponding to the first load; is the power corresponding to the second load.

[0140] It is understandable that in In this case, the output power of the power generation system composed of multiple photovoltaic storage systems can support the load, allowing the power generation system to be switched to off-grid mode.

[0141] When the power at the grid connection point is not greater than 0, that is, In the case of , there is the following correlation between the grid connection point power, the output power of the power generation system, and the power corresponding to each load:

[0142]

[0143] in, is the output power corresponding to the i-th photovoltaic storage system; is the power corresponding to the first load; is the power corresponding to the second load.

[0144] It is understandable that in In this case, the output power of the power generation system composed of multiple photovoltaic storage systems cannot support the load, and the power generation system is not allowed to switch to off-grid mode.

[0145] According to the control method of the power generation system provided in the embodiment of the present application, the output power of the power generation system is determined by the output power of multiple photovoltaic storage devices, and the grid connection point power is determined based on the output power of the power generation system and the power corresponding to the load. The grid connection point power is determined in combination with the actual application scenario to improve the accuracy of the obtained grid connection point power.

[0146] In some embodiments, the grid connection point power can be obtained based on the following steps:

[0147] Adjust the power of the grid connection point based on the power tracking threshold;

[0148] After the target duration, the adjusted grid-connected point power is obtained.

[0149] In this embodiment, the tracking power threshold is a preset value that is greater than the target threshold value required for grid connection point power tracking.

[0150] The tracking power threshold may be determined based on actual conditions. For example, the tracking power threshold may be 10 or 20, which is not limited in this application.

[0151] The target duration is a preset duration.

[0152] The specific value of the target duration can be determined based on actual conditions and is not limited in this application.

[0153] like Figure 5 As shown, in the actual implementation process, the power tracking threshold can be used as a target to adjust the grid-connected point power to a value as close to the power tracking threshold as possible. After the target adjustment time, the adjusted grid-connected point power is obtained, so as to determine whether the output power of the power generation system can support the load based on the grid-connected point power.

[0154] According to the control method of the power generation system provided in the embodiment of the present application, the power of the grid connection point is adjusted so that the power of the grid connection point is tracked to a value as close to the power tracking threshold as possible. By adjusting the power of the grid connection point to a value greater than the target threshold as much as possible, the frequency of occurrence of the load supported by the output power of the power generation system is increased, thereby increasing the probability of allowing the power generation system to be switched to the off-grid mode, thereby improving the user experience.

[0155] In some embodiments, the method can be applied to a grid connection point power regulation system, which includes: at least one first sub-subtractor 801, a power control circuit 802, a second subtractor 803, and a current control circuit 804, wherein the output end of each first sub-subtractor 801 is connected to the input end of the power control circuit 802, the output end of the power control circuit 802 is connected to the input end of the second subtractor 803, and the output end of the second subtractor 803 is connected to the current control circuit; based on the power tracking threshold, adjusting the grid connection point power may include:

[0156] Acquire actual electrical signals of each photovoltaic storage system included in the power generation system;

[0157] Based on the power tracking threshold and the grid connection point power, obtaining a first difference signal output by a target first sub-subtractor 801 in at least one first sub-subtractor 801;

[0158] Based on the first difference signal, obtaining a current reference signal output by the power control circuit 802;

[0159] Based on the current reference signal and the actual electrical signals of each photovoltaic storage system included in the power generation system, a second difference signal output by the second subtractor 803 is obtained;

[0160] Based on the second difference signal, obtaining a regulating signal output by the current control circuit 804;

[0161] Based on the adjustment signal, the power of the grid connection point is adjusted.

[0162] In this embodiment, the actual electrical signal is the actual current of the photovoltaic storage system.

[0163] In the actual implementation process, the actual current of the power generation system can be determined based on the sum of the actual currents of each photovoltaic storage system.

[0164] The grid connection point power regulation system is used to regulate the grid connection point power.

[0165] The first sub-subtractor 801 is used to perform a difference operation on the power tracking threshold and the grid connection point power.

[0166] The target first sub-subtractor 801 is any first sub-subtractor 801 among the at least one first sub-subtractor 801 .

[0167] In some embodiments, the power tracking threshold may include: an active power tracking threshold and a reactive power tracking threshold.

[0168] The grid connection point power may include: grid connection point active power and grid connection point reactive power.

[0169] The target first sub-subtractor 801 can perform a difference operation on the active power tracking threshold and the grid-connected point active power.

[0170] The remaining first sub-subtractors 801 in the at least one first sub-subtractor 801 may perform a difference operation on the reactive power tracking threshold and the grid connection point reactive power.

[0171] Of course, the target first sub-subtractor 801 can perform a difference operation on the reactive power tracking threshold and the grid-connected point reactive power.

[0172] The remaining first sub-subtractors 801 in the at least one first sub-subtractor 801 may perform a difference operation on the active power tracking threshold and the grid connection point active power.

[0173] The power control circuit 802 is used to output a current reference signal.

[0174] The second subtractor 803 is used to perform a difference operation on the current reference signal and the actual current of the power generation system.

[0175] The current control circuit 804 is used to output a regulation signal for regulating the grid-connected point power.

[0176] The regulation signal may be a pulse width modulation signal.

[0177] like Figure 8As shown, in the case where the power generation system includes a photovoltaic storage device, the target first subtractor 801 can perform a difference operation on the power tracking threshold and the grid-connected point power to obtain a first difference signal, and the first difference signal is input to the power control circuit 802. The power control circuit 802 outputs a current reference signal based on the first difference signal. The second subtractor 803 receives the current reference signal and performs a difference operation on the current reference signal and the actual electrical signal of the power generation system (i.e., the actual current) to obtain a second difference signal. The current control circuit 804 outputs an adjustment signal based on the second difference signal to adjust the grid-connected point power.

[0178] In the actual implementation process, the grid connection point power regulation system can make the grid connection point power continuously approach the power tracking threshold. When the output power of the power generation system is sufficient, the grid connection point power can reach the power tracking threshold, that is, the grid connection point active power reaches the active power tracking threshold, and the grid connection point reactive power reaches the reactive power tracking threshold.

[0179] For example, taking the power tracking threshold as 10 and the output power of the power generation system as 20, the grid-connected power can be adjusted to 10 through the grid-connected point power regulation system.

[0180] For another example, taking the power tracking threshold as 10 and the output power of the power generation system as 5, in this case, the output power of the power generation system is insufficient and the power at the grid connection point cannot reach the power tracking threshold.

[0181] like Fig. 9 As shown, in the case where the power generation system includes multiple photovoltaic storage devices, that is, the configuration of the power generation system is as follows Figure 7 In the case shown, the target first sub-subtractor 801 also performs a difference operation on the power tracking threshold and the grid-connected point power to obtain a first difference signal, which is input to the power control circuit 802. The power control circuit 802 outputs a total current reference signal based on the first difference signal.

[0182] Based on the total current reference signal, current reference signals corresponding to each photovoltaic storage device are obtained respectively, and a second difference signal corresponding to the target photovoltaic storage device is obtained by performing a difference operation on the current reference signal corresponding to the target photovoltaic storage device among the photovoltaic storage devices and the actual electrical signal corresponding to the target photovoltaic storage device. The current control circuit 804 outputs an adjustment signal based on the second difference signal.

[0183] The target photovoltaic storage device is any photovoltaic storage device among the multiple photovoltaic storage devices included in the power generation system.

[0184] The correlation between the current reference signal corresponding to each optical storage device and the total current reference signal can be determined based on the following formula:

[0185]

[0186] in, is the total current reference signal; is the current reference signal corresponding to the i-th optical storage device.

[0187] In some embodiments, the current reference signal may be evenly divided to obtain a current reference signal corresponding to each optical storage device.

[0188] In other embodiments, weight information corresponding to each photovoltaic storage device may be determined based on the output power corresponding to each photovoltaic storage device, and the total current reference signal may be divided based on the weight information to obtain a current reference signal corresponding to each photovoltaic storage device.

[0189] The specific division method of the total current reference signal can be determined based on actual conditions and is not limited in this application.

[0190] According to the control method of the power generation system provided in the embodiment of the present application, the power of the grid connection point is adjusted to the value corresponding to the power tracking threshold as much as possible through the grid connection point power regulation system, so that the grid connection point power can be greater than the target threshold when the output power of the power generation system is sufficient, thereby effectively adjusting the grid connection point power, increasing the probability of the power generation system switching to the off-grid mode, and improving the user experience.

[0191] In some embodiments, after step 110, the method may further include:

[0192] When the mode switching instruction is to switch to the off-grid mode and the working mode is the off-grid mode, the power generation system maintains the off-grid mode.

[0193] In this embodiment, if Figure 2 As shown, when the received mode switching instruction is to switch to the off-grid mode, and it is determined that the power generation system is already in the off-grid mode at the current collection moment, the power generation system will continue to maintain the off-grid mode.

[0194] In some embodiments, a prompt message may also be output to remind the user that the power generation system is in off-grid mode.

[0195] According to the control method of the power generation system provided in the embodiment of the present application, by determining that the user needs to switch the power generation system to the off-grid mode, and determining that the power generation system is already in the off-grid mode, the power generation system is maintained in the off-grid mode required by the user without performing additional operations, and the control logic is simple and easy to operate.

[0196] In some embodiments, after step 110, the method may further include:

[0197] When the mode switching instruction is to switch to the grid-connected mode and the working mode is the grid-connected mode, the power generation system maintains the grid-connected mode.

[0198] In this embodiment, when the received mode switching instruction is to switch to the grid-connected mode, and it is determined that the power generation system is already in the grid-connected mode at the current collection moment, the power generation system will continue to maintain the grid-connected mode.

[0199] In some embodiments, a prompt message may also be output to prompt the user that the power generation system is in grid-connected mode.

[0200] According to the control method of the power generation system provided in the embodiment of the present application, by determining that the user needs to switch the power generation system to the grid-connected mode, and determining that the power generation system is already in the grid-connected mode, the power generation system is maintained in the grid-connected mode required by the user without performing additional operations, and the control logic is simple and easy to operate.

[0201] In some embodiments, after step 110, the method may further include:

[0202] When the mode switching instruction is to switch to the grid-connected mode and the working mode is the off-grid mode, the power generation system is switched to the grid-connected mode.

[0203] In this embodiment, during the actual execution process, when the received mode switching instruction is to switch to the grid-connected mode, and the power generation system is in the off-grid mode at the current collection moment, the off-grid mode switch can be disconnected through the grid-connected and off-grid switching device to switch the power generation system from the off-grid mode to the grid-connected mode.

[0204] According to the control method of the power generation system provided in the embodiment of the present application, by determining that the grid-connected mode of the power generation system is different from the off-grid mode required by the user, the power generation system is switched to the off-grid mode required by the user. The control logic is simple, meets the user's usage needs, and improves the user experience.

[0205] The control method of the power generation system provided in the embodiment of the present application can be executed by a control device of the power generation system. In the embodiment of the present application, the control device of the power generation system executing the control method of the power generation system is taken as an example to illustrate the control device of the power generation system provided in the embodiment of the present application.

[0206] An embodiment of the present application also provides a control device for a power generation system.

[0207] The power generation system includes at least one photovoltaic storage system.

[0208] The power generation system is electrically connected to at least one load, and the power generation system is used to be electrically connected to a power grid.

[0209] like Fig.10 As shown, the control device of the power generation system includes: a first processing module 1010 and a second processing module 1020 .

[0210] The first processing module 1010 is used to obtain the received mode switching instruction and the working mode of the power generation system at the current acquisition time; the working mode includes: grid-connected mode or off-grid mode;

[0211] The second processing module 1020 is used to switch the power generation system to the off-grid mode based on the grid connection point power of the grid connection point corresponding to the power grid when the mode switching instruction is to switch to the off-grid mode and the working mode is the grid connection mode.

[0212] According to the control device of the power generation system provided in the embodiment of the present application, by obtaining the mode switching instruction and the working mode of the power generation system, it is determined whether the power generation system needs to be switched from the grid-connected mode to the off-grid mode. When it is necessary to switch from the grid-connected mode to the off-grid mode, it is further determined whether the switching is allowed based on the grid connection point power, thereby alleviating the problem that the output power of the power generation system is insufficient to support the load, causing the load to shut down. There is no need to be equipped with high-power photovoltaic modules and energy storage batteries, which reduces costs, reduces the occurrence of power generation system failures, extends the service life of the power generation system, and improves user experience.

[0213] In some embodiments, the second processing module 1020 may also be used to:

[0214] When the power at the grid-connected point is greater than the target threshold, the power generation system is switched to off-grid mode.

[0215] In some embodiments, the second processing module 1020 may also be used to:

[0216] When the power of the grid connection point is not greater than the target threshold, outputting first prompt information, where the first prompt information is used to instruct the user to cut off part of the at least one load;

[0217] After the user cuts off part of the load, obtain new grid-connected power;

[0218] When the power of the new grid-connected point is greater than the target threshold, the power generation system is switched to off-grid mode.

[0219] In some embodiments, the second processing module 1020 may also be used to:

[0220] Determining the output power of the power generation system based on the output power corresponding to each photovoltaic storage system included in the power generation system;

[0221] The grid connection point power is obtained based on the output power of the power generation system and the total power of at least one load.

[0222] In some embodiments, the second processing module 1020 may also be used to:

[0223] Adjust the power of the grid connection point based on the power tracking threshold;

[0224] After the target duration, the adjusted grid-connected point power is obtained.

[0225] In some embodiments, the second processing module 1020 may also be used to:

[0226] Acquire actual electrical signals of each photovoltaic storage system included in the power generation system;

[0227] Based on the power tracking threshold and the grid connection point power, obtaining a first difference signal output by a target first sub-subtractor 801 in at least one first sub-subtractor 801;

[0228] Based on the first difference signal, obtaining a current reference signal output by the power control circuit 802;

[0229] Based on the current reference signal and the actual electrical signals of each photovoltaic storage system included in the power generation system, a second difference signal output by the second subtractor 803 is obtained;

[0230] Based on the second difference signal, obtaining a regulating signal output by the current control circuit 804;

[0231] Based on the adjustment signal, the power of the grid connection point is adjusted.

[0232] In some embodiments, the apparatus may further include a third processing module, configured to:

[0233] When the mode switching instruction is to switch to the off-grid mode and the working mode is the off-grid mode, the power generation system maintains the off-grid mode.

[0234] In some embodiments, the apparatus may further include a fourth processing module, configured to:

[0235] When the mode switching instruction is to switch to the grid-connected mode and the working mode is the grid-connected mode, the power generation system maintains the grid-connected mode.

[0236] In some embodiments, the apparatus may further include a fifth processing module, configured to:

[0237] When the mode switching instruction is to switch to the grid-connected mode and the working mode is the off-grid mode, the power generation system is switched to the grid-connected mode.

[0238] The control device of the power generation system in the embodiment of the present application may be a power generation system, or an electronic device connected to the power generation system in communication, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices other than a terminal. Exemplarily, the electronic device may be a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) device, a robot, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), etc. It may also be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0239] The control device of the power generation system in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an IOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0240] The control device of the power generation system provided in the embodiment of the present application can achieve Figures 1 to 9 To avoid repetition, the various processes implemented by the method embodiment are not described here.

[0241] The embodiment of the present application also provides a power generation system.

[0242] like Figure 7 As shown, the power generation system includes: at least one photovoltaic storage system.

[0243] In this embodiment, the power generation system may include one or more photovoltaic storage systems.

[0244] like Figure 6 As shown, the photovoltaic storage system may include: a photovoltaic system, an energy storage system and an inverter system.

[0245] The specific number of photovoltaic storage systems included in the power generation system can be determined based on actual conditions and is not limited in this application.

[0246] According to the power generation system provided in the embodiment of the present application, by obtaining the mode switching instruction and the working mode of the power generation system, it is determined whether the power generation system needs to be switched from the grid-connected mode to the off-grid mode. When it is necessary to switch from the grid-connected mode to the off-grid mode, it is further determined whether the switching is allowed based on the grid connection point power, thereby alleviating the problem that the output power of the power generation system is insufficient to support the load, causing the load to shut down. There is no need to be equipped with high-power photovoltaic modules and energy storage batteries, which reduces costs, reduces the occurrence of power generation system failures, extends the service life of the power generation system, and improves user experience.

[0247] In some embodiments, Fig.11 As shown, an embodiment of the present application further provides an electronic device 1100, including a processor 1101, a memory 1102, and a computer program stored in the memory 1102 and executable on the processor 1101. When the program is executed by the processor 1101, each process of the control method embodiment of the above-mentioned power generation system is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0248] It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and non-mobile electronic devices mentioned above.

[0249] An embodiment of the present application also provides a grid connection point power regulation system based on the control method of the power generation system as described in any of the above embodiments.

[0250] like Figure 8 As shown, the grid connection point power regulation system includes: at least one first sub-subtractor 801, a power control circuit 802, a second subtractor 803 and a current control circuit 804.

[0251] In this embodiment, at least one first sub-subtractor 801 is used to perform a difference operation on the power tracking threshold and the grid connection point power.

[0252] The at least one first sub-subtractor 801 includes: a target first sub-subtractor 801 and remaining first sub-subtractors 801 in the at least one first sub-subtractor 801 except the target first sub-subtractor 801 .

[0253] The power tracking threshold may include: an active power tracking threshold and a reactive power tracking threshold.

[0254] Among them, the active power tracking threshold can be expressed as P ref ; Reactive power tracking threshold Q ref .

[0255] The grid connection point power may include: grid connection point active power and grid connection point reactive power.

[0256] Among them, the active power of the grid connection point can be expressed as Ppcc ; The reactive power at the grid connection point can be expressed as Q ppc .

[0257] The target first sub-subtractor 801 can perform a difference operation on the active power tracking threshold and the grid-connected point active power.

[0258] The remaining first sub-subtractors 801 in the at least one first sub-subtractor 801 may perform a difference operation on the reactive power tracking threshold and the grid connection point reactive power.

[0259] Of course, the target first sub-subtractor 801 can perform a difference operation on the reactive power tracking threshold and the grid-connected point reactive power.

[0260] The remaining first sub-subtractors 801 in the at least one first sub-subtractor 801 may perform a difference operation on the active power tracking threshold and the grid connection point active power.

[0261] The power control circuit 802 is used to output a current reference signal.

[0262] The second subtractor 803 is used to perform a difference operation on the current reference signal and the actual current of the power generation system.

[0263] The current control circuit 804 is used to output a regulation signal for regulating the grid-connected point power.

[0264] like Fig. 9 As shown, in some embodiments, the second subtractor 803 may further include: at least one second sub-subtractor.

[0265] The second sub-subtractor is used to perform a difference operation on a current reference signal corresponding to a target optical storage device among the optical storage devices and an actual electrical signal corresponding to the target optical storage device, and output a second difference signal corresponding to the target optical storage device.

[0266] The input terminals of the second sub-subtractor are connected to the output terminals of the power control circuit 802 respectively.

[0267] According to the grid connection point power regulation system provided in the embodiment of the present application, a plurality of second sub-subtractors are provided to respectively process the current reference signal corresponding to each photovoltaic storage system and the actual electrical signal corresponding to each photovoltaic storage system, and a regulation signal is generated based on the actual electrical signal of each photovoltaic storage system, thereby improving the accuracy of grid connection point power regulation.

[0268] Continue to refer Fig. 9 In some embodiments, the current control circuit 804 may further include: at least one current control sub-circuit.

[0269] The current control subcircuit is used to output a regulating signal corresponding to the target light storage device based on the second difference signal of the target light storage device.

[0270] The input end of each current control sub-circuit is connected to the output end of each second sub-subtractor in a one-to-one correspondence.

[0271] According to the grid connection point power regulation system provided in the embodiment of the present application, the second difference signals output by each second sub-subtractor are processed separately through the current control subcircuit, and a regulation signal is generated based on the second difference signal to improve the accuracy of grid connection point power regulation.

[0272] During the actual execution process, the power control circuit 802 can output a total current reference signal, and generate current reference signals corresponding to each photovoltaic storage system by dividing the total current reference signal, so as to process the current reference signals corresponding to the target photovoltaic storage system in each photovoltaic storage system respectively, and generate adjustment signals corresponding to the target photovoltaic storage system. Through multiple adjustment signals, the grid connection point power is jointly adjusted.

[0273] According to the grid connection point power regulation system provided in the embodiment of the present application, the power of the grid connection point is adjusted to the value corresponding to the power tracking threshold as much as possible, so that the power of the grid connection point can be greater than the target threshold when the output power of the power generation system is sufficient, thereby effectively regulating the power of the grid connection point, increasing the probability of the power generation system switching to the off-grid mode, and improving the user experience.

[0274] An embodiment of the present application also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the various processes of the control method embodiment of the above-mentioned power generation system are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0275] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0276] An embodiment of the present application also provides a computer program product, including a computer program, which implements the control method of the above-mentioned power generation system when executed by a processor.

[0277] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0278] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the control method embodiment of the above-mentioned power generation system, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0279] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0280] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0281] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the relevant technology, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, disk, CD), and includes a number of instructions for a terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0282] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

[0283] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0284] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A control method for a power generation system, characterized in that: The power generation system includes at least one photovoltaic storage system, the power generation system is electrically connected to at least one load, and the power generation system is used to be electrically connected to a power grid; the method includes: Acquire the received mode switching instruction and the working mode of the power generation system at the current acquisition time; the working mode includes: grid-connected mode or off-grid mode; When the mode switching instruction is to switch to the off-grid mode and the working mode is the grid-connected mode, based on the acquired grid-connected point power of the grid-connected point corresponding to the power grid, the power generation system is switched to the off-grid mode; The grid connection point power is obtained based on the following steps: Based on a power tracking threshold, adjusting the power of the grid connection point; After the target duration, obtaining the adjusted grid connection point power; The control method of the power generation system is applied to a grid connection point power regulation system, which includes: at least one first sub-subtractor, a power control circuit, a second subtractor and a current control circuit, wherein the output end of each of the first sub-subtractors is connected to the input end of the power control circuit, the output end of the power control circuit is connected to the input end of the second subtractor, and the output end of the second subtractor is connected to the current control circuit; the method of regulating the grid connection point power based on the power tracking threshold includes: Acquiring actual electrical signals of each of the photovoltaic storage systems included in the power generation system; Based on the power tracking threshold and the grid connection point power, obtaining a first difference signal output by a target first sub-subtractor in the at least one first sub-subtractor; Based on the first difference signal, obtaining a current reference signal output by the power control circuit; Based on the current reference signal and the actual electrical signal of each of the photovoltaic storage systems included in the power generation system, obtaining a second difference signal output by the second subtractor; Based on the second difference signal, obtaining a regulating signal output by the current control circuit; Based on the adjustment signal, the grid connection point power is adjusted.

2. The control method of the power generation system according to claim 1, characterized in that: The step of switching the power generation system to the off-grid mode based on the acquired grid connection point power of the grid connection point corresponding to the power grid includes: When the grid-connected point power is greater than a target threshold, the power generation system is switched to the off-grid mode.

3. The control method of the power generation system according to claim 1, characterized in that: The switching of the power generation system to the off-grid mode based on the acquired grid connection point power of the grid connection point corresponding to the power grid also includes: When the grid connection point power is not greater than the target threshold, outputting first prompt information, wherein the first prompt information is used to instruct the user to cut off part of the at least one load; After the user cuts off the part of the load, obtaining new grid-connected point power; When the power of the new grid-connected point is greater than the target threshold, the power generation system is switched to the off-grid mode.

4. The control method of the power generation system according to any one of claims 1 to 3, characterized in that: The grid connection point power is obtained based on the following steps: Determining the output power of the power generation system based on the output power corresponding to each of the photovoltaic storage systems included in the power generation system; The grid connection point power is obtained based on the output power of the power generation system and the total power of the at least one load.

5. The control method of the power generation system according to any one of claims 1 to 3, characterized in that: After acquiring the received mode switching instruction and the working mode of the power generation system at the current acquisition moment, the method further includes: When the mode switching instruction is to switch to the off-grid mode and the working mode is the off-grid mode, the power generation system maintains the off-grid mode.

6. The control method of the power generation system according to any one of claims 1 to 3, characterized in that: After acquiring the received mode switching instruction and the working mode of the power generation system at the current acquisition moment, the method further includes: When the mode switching instruction is to switch to the grid-connected mode and the working mode is the grid-connected mode, the power generation system maintains the grid-connected mode.

7. The control method of the power generation system according to any one of claims 1 to 3, characterized in that: After acquiring the received mode switching instruction and the working mode of the power generation system at the current acquisition moment, the method further includes: When the mode switching instruction is to switch to the grid-connected mode and the working mode is the off-grid mode, the power generation system is switched to the grid-connected mode.

8. A control device for a power generation system, characterized in that: The power generation system includes at least one photovoltaic storage system, the power generation system is electrically connected to at least one load, and the power generation system is used to be electrically connected to a power grid; the device includes: A first processing module is used to obtain the received mode switching instruction and the working mode of the power generation system at the current acquisition time; the working mode includes: grid-connected mode or off-grid mode; The second processing module is used to switch the power generation system to the off-grid mode based on the grid connection point power of the grid connection point corresponding to the grid when the mode switching instruction is to switch to the off-grid mode and the working mode is the grid connection mode. The second processing module is also used for: Based on a power tracking threshold, adjusting the power of the grid connection point; After the target duration, obtaining the adjusted grid connection point power; The control device of the power generation system is applied to a grid-connected point power regulation system, and the grid-connected point power regulation system comprises: at least one first sub-subtractor, a power control circuit, a second subtractor and a current control circuit, wherein the output end of each of the first sub-subtractors is connected to the input end of the power control circuit, the output end of the power control circuit is connected to the input end of the second subtractor, and the output end of the second subtractor is connected to the current control circuit; the second processing module is further used for: Acquiring actual electrical signals of each of the photovoltaic storage systems included in the power generation system; Based on the power tracking threshold and the grid connection point power, obtaining a first difference signal output by a target first sub-subtractor in the at least one first sub-subtractor; Based on the first difference signal, obtaining a current reference signal output by the power control circuit; Based on the current reference signal and the actual electrical signal of each of the photovoltaic storage systems included in the power generation system, obtaining a second difference signal output by the second subtractor; Based on the second difference signal, obtaining a regulating signal output by the current control circuit; Based on the adjustment signal, the grid connection point power is adjusted.

9. A power generation system, characterized in that: include: at least one solar storage system; The power generation system switches the working mode based on the control method of the power generation system according to any one of claims 1-7.

10. A grid connection point power regulation system based on the control method of the power generation system according to any one of claims 1 to 7, characterized in that: include: at least one first sub-subtractor; A power control circuit, wherein the output end of each of the first sub-subtractors is respectively connected to the input end of the power control circuit; a second subtractor, wherein an input terminal of the second subtractor is connected to an output terminal of the power control circuit; A current control circuit, wherein the input end of the current control circuit is connected to the output end of the second subtractor, and the output end of the current control circuit outputs a regulating signal, wherein the regulating signal is used to regulate the grid connection point power.

11. The grid connection point power regulation system according to claim 10, characterized in that: The second subtractor further includes: at least one second sub-subtractor, wherein the input end of each second sub-subtractor is respectively connected to the output end of the power control circuit; The current control circuit further includes: At least one current control sub-circuit, the input end of each current control sub-circuit is connected to the output end of each second sub-subtractor in a one-to-one correspondence.

12. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method of the power generation system as described in any one of claims 1 to 7 is implemented.

13. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the control method of the power generation system according to any one of claims 1 to 7 is implemented.

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