Global maximum power point searching method and device, electronic equipment and storage medium

Abstract

The invention relates to the technical field of photovoltaics, and discloses a global maximum power point searching method and device, electronic equipment and a storage medium, which are used for reducing hardware requirements for searching a global maximum power point. The method comprises the following steps: acquiring operation data of an inverter, wherein the operation data comprises the voltage of each path of MPPT and the current of each photovoltaic string in each path of MPPT; determining a target MPPT based on the voltage of each path of MPPT and the current of each photovoltaic string in each path of MPPT, wherein the target MPPT is an MPPT falling into a local maximum power point; judging whether the inverter has a global scanning function or not; if the inverter does not have the global scanning function, performing multiple times of short circuit and recovery on part of photovoltaic modules of the target MPPT through a plurality of preset bypass switches, and determining the MPPT power after each recovery to obtain a plurality of candidate MPPT powers; and according to the maximum value of the MPPT power in the plurality of candidate MPPT power, carrying out short circuit on a part of photovoltaic modules in the target MPPT, so that the inverter finds a global maximum power point within a preset range of the maximum value of the MPPT power.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a method, device, electronic device and storage medium for finding a global maximum power point. Background Art

[0002] String inverters are generally used in scenes with complex terrain and severe shadowing because they have multi-channel maximum power point tracking (MPPT) functions. When a photovoltaic string is partially shadowed, the IV curve of the string inverter exhibits multi-peak characteristics. If a string inverter is locally scanned, it may fall into a local maximum power point. A global scan of the string inverter can find the global maximum power point, but not all inverters have a global scan function.

[0003] Existing solutions generally use an inverter with a global scanning function to find the global maximum power point. However, the existing solutions rely on the global scanning function of the inverter itself and cannot be applied to other inverters that do not have a global scanning function, and have high hardware requirements. Summary of the invention

[0004] The present application provides a global maximum power point search method, device, electronic device and storage medium, which are used to determine a target MPPT that is trapped in a local maximum power point in an inverter, and to perform multiple short-circuits and recovery on some components in the target MPPT to determine the maximum MPPT power, and to find the global maximum power point of the target MPPT based on the maximum MPPT power, thereby solving the problem that finding the global maximum power point depends on the inverter's own global scanning function, and achieving the effect of reducing the hardware requirements for finding the global maximum power point.

[0005] A first aspect of an embodiment of the present application provides a method for finding a global maximum power point, including: obtaining operating data of an inverter, the operating data including the voltage of each MPPT and the current of each photovoltaic string in each MPPT, the inverter including multiple MPPTs, and each MPPT including multiple photovoltaic strings; determining a target MPPT based on the voltage of each MPPT and the current of each photovoltaic string in each MPPT, the target MPPT being an MPPT that falls into a local maximum power point; judging whether the inverter has a global scanning function; if the inverter does not have a global scanning function, short-circuiting and restoring some photovoltaic components of the target MPPT multiple times through multiple preset bypass switches, and determining the MPPT power after each recovery to obtain multiple candidate MPPT powers; short-circuiting some photovoltaic components in the target MPPT according to the maximum MPPT power among the multiple candidate MPPT powers, so that the inverter finds the global maximum power point within a preset range of the maximum MPPT power.

[0006] The second aspect of the embodiment of the present application provides a global maximum power point search device, including: an acquisition module, used to acquire the operating data of the inverter, the operating data including the voltage of each MPPT and the current of each photovoltaic string in each MPPT, the inverter includes multiple MPPTs, and each MPPT includes multiple photovoltaic strings; a determination module, used to determine the target MPPT based on the voltage of each MPPT and the current of each photovoltaic string in each MPPT, the target MPPT is the MPPT that falls into a local maximum power point; a judgment module, used to judge whether the inverter has a global scanning function; a short-circuit recovery module, used to, if the inverter does not have a global scanning function, perform multiple short-circuit and recovery on some photovoltaic components of the target MPPT through multiple preset bypass switches, and determine the MPPT power after each recovery to obtain multiple candidate MPPT powers; a short-circuit module, used to short-circuit some photovoltaic components in the target MPPT according to the maximum MPPT power among the multiple candidate MPPT powers, so that the inverter can find the global maximum power point within a preset range of the maximum MPPT power.

[0007] A third aspect of an embodiment of the present application provides an electronic device, comprising: a memory and at least one processor, wherein instructions are stored in the memory; and at least one processor calls the instructions in the memory so that the electronic device executes the global maximum power point search method of the first aspect mentioned above.

[0008] A fourth aspect of the present application provides a computer-readable storage medium, in which instructions are stored. When the computer-readable storage medium is run on a computer, the computer executes the above-mentioned global maximum power point finding method.

[0009] In the technical solution provided in the embodiment of the present application, the operation data of the inverter is obtained, the operation data including the voltage of each MPPT and the current of each photovoltaic string in each MPPT, the inverter includes multiple MPPTs, and each MPPT includes multiple photovoltaic strings; based on the voltage of each MPPT and the current of each photovoltaic string in each MPPT, the target MPPT is determined, and the target MPPT is the MPPT that falls into a local maximum power point; it is judged whether the inverter has a global scanning function; if the inverter does not have a global scanning function, some photovoltaic components of the target MPPT are short-circuited and restored multiple times through multiple preset bypass switches, and the MPPT power after each recovery is determined to obtain multiple candidate MPPT powers; some photovoltaic components in the target MPPT are short-circuited according to the maximum MPPT power among the multiple candidate MPPT powers, so that the inverter can find the global maximum power point within the preset range of the maximum MPPT power. The embodiment of the present application determines a target MPPT that is trapped in a local maximum power point in the inverter, performs multiple short-circuit and recovery operations on some components in the target MPPT to determine the maximum MPPT power, and uses the maximum MPPT power as a benchmark to find the global maximum power point of the target MPPT. This solves the problem that finding the global maximum power point depends on the inverter's own global scanning function, thereby achieving the effect of reducing the hardware requirements for finding the global maximum power point. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A schematic diagram of an embodiment of a method for finding a global maximum power point in an embodiment of the present application;

[0011] Figure 2 This is a schematic diagram of the IV curve of the photovoltaic string in the embodiment of the present application;

[0012] Figure 3 This is a schematic diagram of the connection of the bypass switch in the embodiment of the present application;

[0013] Figure 4 A schematic diagram of another embodiment of the method for finding the global maximum power point in the embodiment of the present application;

[0014] Figure 5 A schematic diagram of another embodiment of the method for finding the global maximum power point in the embodiment of the present application;

[0015] Figure 6 A schematic diagram of a global maximum power point finding device in an embodiment of the present application;

[0016] Figure 7 A schematic diagram of a global maximum power point finding device in an embodiment of the present application. DETAILED DESCRIPTION

[0017] The present application provides a global maximum power point search method, device, electronic device and storage medium, which are used to determine a target MPPT that is trapped in a local maximum power point in an inverter, and to perform multiple short-circuits and recovery on some components in the target MPPT to determine the maximum MPPT power, and to find the global maximum power point of the target MPPT based on the maximum MPPT power, thereby solving the problem that finding the global maximum power point depends on the inverter's own global scanning function, and achieving the effect of reducing the hardware requirements for finding the global maximum power point.

[0018] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0019] See also Figure 1 , a flowchart of a method for finding a global maximum power point provided in an embodiment of the present application, specifically comprising:

[0020] 101. Obtain operation data of the inverter, where the operation data includes the voltage of each MPPT and the current of each photovoltaic string in each MPPT. The inverter includes multiple MPPTs, and each MPPT includes multiple photovoltaic strings.

[0021] The global maximum power point search device obtains the operating data of the inverter, and the operating data includes the voltage of each MPPT and the current of each photovoltaic string in each MPPT. The inverter includes multiple MPPTs, and each MPPT includes multiple photovoltaic strings. The inverter involved in the embodiment of the present application and subsequent embodiments is a string inverter. The string inverter has a multi-channel MPPT function and is connected to multiple MPPTs. Each MPPT includes multiple photovoltaic strings, and each photovoltaic string is composed of multiple photovoltaic components connected in series. Because the multiple photovoltaic strings connected to the MPPT are connected in parallel, the voltage of the photovoltaic string is equal to the voltage of each MPPT, so obtaining the voltage of each MPPT is to obtain the voltage of each photovoltaic string.

[0022] The executor of the embodiment of the present application may be a global maximum power point finding device, or other controllers with processing functions. For ease of description, the embodiment of the present application and subsequent embodiments are described using the global maximum power point finding device as an example.

[0023] 102. Determine a target MPPT based on the voltage of each MPPT and the current of each photovoltaic string in each MPPT, where the target MPPT is an MPPT that falls into a local maximum power point.

[0024] The global maximum power point finding device determines the target MPPT based on the voltage of each MPPT and the current of each photovoltaic string in each MPPT. The target MPPT is the MPPT that falls into the local maximum power point.

[0025] Specifically, the inverter may include multiple MPPTs. For multiple MPPTs under the same inverter, the real-time data of the operation data of each MPPT at the current moment can be used, for example, the current and voltage of each photovoltaic string. Because the multiple photovoltaic strings connected to the MPPT are connected in parallel, the voltage of the photovoltaic string is equal to the voltage of each MPPT; therefore, the MPPT average voltage and MPPT average current of the inverter are determined through the voltage of each MPPT and the current of each photovoltaic string in each MPPT. The voltage of each MPPT and the photovoltaic string current in the inverter are compared with the MPPT average voltage and MPPT average current of the inverter respectively to determine the target MPPT with abnormal output, and the target MPPT falls into the local maximum power point.

[0026] It should be noted that the same MPPT may sometimes fall into the local maximum power point and sometimes not. Whether it falls into the local maximum power point is somewhat accidental. However, as long as the voltage of each MPPT and the current of each photovoltaic string in each MPPT do not meet the preset conditions, the target MPPT can be determined as the MPPT that falls into the local maximum power point.

[0027] 103. Determine whether the inverter has a global scanning function.

[0028] The global maximum power point finding device determines whether the inverter has a global scanning function. After determining the target MPPT that falls into the local maximum power point in each inverter, it is necessary to determine whether the inverter corresponding to the target MPPT has a global scanning function. Only some inverters are equipped with relevant hardware, so corresponding function detection is required.

[0029] It is understandable that each inverter has a local scanning function, but only some inverters have a global scanning function. Because the global scanning function has high hardware requirements, only some inverters are equipped with relevant hardware. Among them, the global scanning function means that when the MPPT is looking for the maximum power point, it controls the DC voltage to scan the entire voltage segment from the open circuit voltage to the short circuit voltage to obtain the maximum power point in the entire voltage segment; the local scanning function means that when the MPPT is looking for the maximum power point, it controls the DC voltage to scan within a small range. During the scanning process, the scanning is stopped when the first maximum power point is encountered to obtain the local maximum power point. In particular, when the photovoltaic string is partially shaded, the corresponding IV curve will have multiple peaks, and the local maximum power point is likely not the global maximum power point. Figure 2 As shown, the global maximum power point is between 600V and 700V, while the local maximum power point is between 800V and 900V.

[0030] 104. If the inverter does not have a global scanning function, some photovoltaic modules of the target MPPT are short-circuited and restored multiple times through multiple preset bypass switches, and the MPPT power after each recovery is determined to obtain multiple candidate MPPT powers.

[0031] If the inverter does not have a global scanning function, the global maximum power point search device uses multiple preset bypass switches to short-circuit and restore some photovoltaic components of the target MPPT multiple times, and determines the MPPT power after each recovery to obtain multiple candidate MPPT powers.

[0032] When the target MPPT falls into a local maximum power point, for inverters without global scanning function, some components are short-circuited to help the MPPT find the global maximum power point. Figure 3 As shown, Figure 3 The schematic diagram of a photovoltaic string includes 6 photovoltaic modules, from which a certain number of photovoltaic modules can be selected, for example, 2, and a bypass switch is connected in parallel. When the bypass switch is closed, the photovoltaic modules connected in parallel with the bypass switch will be short-circuited. When the bypass switch is opened, the photovoltaic modules connected in parallel with the bypass switch will generate electricity normally.

[0033] It is understandable that each time a PV module is short-circuited, because the number of PV modules connected in series in the PV string is reduced, the voltage of the MPPT decreases, causing the MPPT's operating point to move toward the short-circuit voltage point (i.e., toward a lower voltage). When restoring the short-circuited PV module, the MPPT will search near the voltage of the current operating point (i.e., the reduced voltage), where the voltage of the current operating point is smaller than the voltage of the operating point when there is no short circuit, i.e., the operating point moves to the left on the IV curve.

[0034] 105. Short-circuit some photovoltaic modules in the target MPPT according to the maximum MPPT power among the multiple candidate MPPT powers, so that the inverter finds the global maximum power point within a preset range of the maximum MPPT power.

[0035] The global maximum power point finding device short-circuits some photovoltaic modules in the target MPPT according to the maximum MPPT power among multiple candidate MPPT powers, so that the inverter finds the global maximum power point within a preset range of the maximum MPPT power.

[0036] It can be understood that the candidate MPPT power determined after each short circuit and recovery is equivalent to redetermining a local maximum power point (a peak on the MPPT IV curve). Then multiple candidate MPPT powers correspond to multiple local maximum power points. By selecting a maximum value among multiple local maximum power points, it can be located near the global maximum power point.

[0037] It should be noted that because the minimum adjustment granularity of the global scan is one-third of a single component, and the minimum adjustment granularity when the photovoltaic component is short-circuited by the bypass switch in this embodiment is a single component, the voltage difference between the final determined MPPT power maximum value and the global maximum power point of the inverter will not exceed the rated voltage of a photovoltaic component. Therefore, the final determined MPPT power maximum value is near the global maximum power point, and the inverter can find the global maximum power point of the inverter by automatically performing local scanning.

[0038] The embodiment of the present application determines a target MPPT that is trapped in a local maximum power point in the inverter, performs multiple short-circuit and recovery operations on some components in the target MPPT to determine the maximum MPPT power, and uses the maximum MPPT power as a benchmark to find the global maximum power point of the target MPPT. This solves the problem that finding the global maximum power point depends on the inverter's own global scanning function, thereby achieving the effect of reducing the hardware requirements for finding the global maximum power point.

[0039] See also Figure 4 , another flow chart of the global maximum power point finding method provided by an embodiment of the present application, specifically includes:

[0040] 401. Obtain operation data of the inverter, where the operation data includes the voltage of each MPPT and the current of each photovoltaic string in each MPPT. The inverter includes multiple MPPTs, and each MPPT includes multiple photovoltaic strings.

[0041] The global maximum power point search device obtains the operating data of the inverter, and the operating data includes the voltage of each MPPT and the current of each photovoltaic string in each MPPT. The inverter includes multiple MPPTs, and each MPPT includes multiple photovoltaic strings. The inverter involved in the embodiment of the present application and subsequent embodiments is a string inverter. The string inverter has a multi-channel MPPT function and is connected to multiple MPPTs. Each MPPT includes multiple photovoltaic strings, and each photovoltaic string is composed of multiple photovoltaic components connected in series. Because the multiple photovoltaic strings connected to the MPPT are connected in parallel, the voltage of the photovoltaic string is equal to the voltage of each MPPT, so obtaining the voltage of each MPPT is to obtain the voltage of each photovoltaic string.

[0042] 402. Determine the MPPT average voltage and MPPT average current corresponding to each MPPT based on a preset time window, the voltage of each MPPT, and the current of each photovoltaic string in each MPPT.

[0043] Specifically, the global maximum power point finding device takes the average voltage of each MPPT within a preset time window to obtain the MPPT average voltage corresponding to each MPPT; the global maximum power point finding device takes the average current of each photovoltaic string within a preset time window to obtain the string average current of each photovoltaic string; the global maximum power point finding device takes the average string current of each photovoltaic string according to the MPPT to which it belongs to obtain the MPPT average current corresponding to each MPPT.

[0044] For example, assuming that the inverter has two MPPTs, each MPPT is connected to two PV strings, the collection interval of the operating data is 1 minute, and the time window is 1 hour, then the 60 voltage data of each MPPT within 1 hour are averaged to obtain the MPPT average voltage of each MPPT within 1 hour; similarly, the 60 PV string current data of each PV string within 1 hour are averaged to obtain the string average current of each PV string within 1 hour, and then for each MPPT, the average string current corresponding to the two connected PV strings is averaged to obtain the MPPT average current corresponding to each MPPT.

[0045] 403. Determine a minimum MPPT average voltage and a maximum MPPT average current corresponding to the inverter based on the MPPT average voltage and the MPPT average current corresponding to each MPPT.

[0046] The global maximum power point finding device compares the MPPT average voltages of each MPPT in the inverter, determines the minimum value among the MPPT average voltages of each MPPT, and obtains the minimum MPPT average voltage of the inverter; similarly, the global maximum power point finding device compares the MPPT average currents of each MPPT in the inverter, determines the maximum value among the MPPT average currents of each MPPT, and obtains the maximum MPPT average current of the inverter.

[0047] When comparing MPPTs, only multiple MPPTs connected to each inverter will be compared, and MPPTs that do not belong to different inverters will not be compared.

[0048] 404. Determine an MPPT that meets preset conditions among the multiple MPPTs as a target MPPT. The preset conditions are that the MPPT average voltage is greater than the product of the minimum MPPT average voltage and the first coefficient, and the MPPT average current is less than the product of the maximum MPPT average current and the second coefficient.

[0049] For example, assuming that the first coefficient a is 1.2 (a>1), and the second coefficient b is 0.2 (b<1), the minimum MPPT average voltage is The maximum MPPT average current is Then the global maximum power point finding device determines the MPPT average voltage of each MPPT Is it greater than the minimum MPPT average voltage? The product of the first coefficient a and the MPPT average current Is it less than the product of the maximum MPPT average current and the second coefficient b, that is, to determine whether each MPPT meets the requirements at the same time The MPPTs that are satisfied simultaneously are determined as the target MPPTs that fall into the local maximum power point.

[0050] It can be understood that the first coefficient and the second coefficient here are both to avoid misjudgment due to acquisition errors and misjudgment due to data fluctuations, thereby improving the accuracy of the selection of the target MPPT.

[0051] It should be noted that for multiple photovoltaic strings in an inverter, if there is no shadow, then there is only one maximum power point in the corresponding IV curve, that is, the global maximum power point; if there is a shadow, the global maximum power point of the string will be on the left side of the global maximum power point of the string without shadow, and the local maximum power point of the string with shadow will be on the right side of the global maximum power point of the string without shadow. Among them, the voltage of the local maximum power point is generally greater than the voltage of the global maximum power point, and at the same time, the current of the local maximum power point is generally smaller than the current of the global maximum power point. Therefore, the average voltage at the working point of the MPPT is larger and the average current is smaller, which means that the working point can be determined to be on the right side of the global maximum power point, which is the local maximum power point.

[0052] 405. Determine whether the inverter has a global scanning function.

[0053] The global maximum power point finding device determines whether the inverter has a global scanning function. After determining the target MPPT that falls into the local maximum power point in each inverter, it is necessary to determine whether the inverter corresponding to the target MPPT has a global scanning function. Because the global scanning function has high hardware requirements, only some inverters are equipped with relevant hardware, so corresponding function detection is required.

[0054] It is understandable that each inverter has a local scanning function, but only some inverters have a global scanning function. Because the global scanning function has high hardware requirements, only some inverters are equipped with relevant hardware. Among them, the global scanning function means that when the MPPT is looking for the maximum power point, it controls the DC voltage to scan the entire voltage segment from the open circuit voltage to the short circuit voltage to obtain the maximum power point in the entire voltage segment; the local scanning function means that when the MPPT is looking for the maximum power point, it controls the DC voltage to scan within a small range. During the scanning process, the scanning is stopped when the first maximum power point is encountered to obtain the local maximum power point. In particular, when the photovoltaic string is partially shaded, the corresponding IV curve will have multiple peaks, and the local maximum power point is likely not the global maximum power point. Figure 2 shown.

[0055] 406. If the inverter does not have a global scanning function, short-circuit and restore some photovoltaic modules of the target MPPT multiple times through multiple preset bypass switches, and determine the MPPT power after each restoration to obtain multiple candidate MPPT powers.

[0056] Specifically, if the inverter does not have a global scanning function, the global maximum power point finding device closes the first bypass switch in a preset plurality of bypass switches in a switching sequence to short-circuit the photovoltaic components connected in parallel with the first bypass switch; after the current voltage of the target MPPT is stable, the global maximum power point finding device disconnects the first bypass switch to restore the photovoltaic components connected in parallel with the first bypass switch to normal operation; after the current voltage of the target MPPT is stabilized again, the global maximum power point finding device determines the MPPT power after the first recovery; the global maximum power point finding device closes the first bypass switch and the second bypass switch in a switching sequence among the preset plurality of bypass switches to short-circuit the photovoltaic components connected in parallel with the first bypass switch and the second bypass switch respectively; after the current voltage of the target MPPT is stable, the global maximum power point finding device determines the MPPT power after the first recovery. The local maximum power point finding device disconnects the first bypass switch and the second bypass switch so that the photovoltaic components connected in parallel with the first bypass switch and the second bypass switch respectively resume normal operation; after the current voltage of the target MPPT is restored to stability, the global maximum power point finding device determines the MPPT power after the second recovery; the global maximum power point finding device closes and opens multiple bypass switches multiple times according to preset rules to determine the MPPT power after other multiple recoveries, wherein the preset rule is that the number of switches closed each time is one more than the number of switches closed last time, until all bypass switches are closed and opened at the same time; the global maximum power point finding device combines the MPPT power after the first recovery, the MPPT power after the second recovery, and the MPPT power after other multiple recoveries to obtain multiple candidate MPPT powers.

[0057] For example, when the target MPPT photovoltaic string A includes 20 photovoltaic modules, 10 of them can be connected to bypass switches in parallel and numbered in sequence to obtain bypass switches 1 to 10. If the inverter does not have a global scanning function, the target MPPT is short-circuited. The specific process is as follows: close the bypass switch 1 of the photovoltaic string A, and after the target MPPT voltage stabilizes, disconnect the bypass switch 1, and after the MPPT voltage stabilizes, record the DC power of the target MPPT at this time, which is recorded as the MPPT power after the first recovery; similarly, close the bypass switch 1 and bypass switch 2 of the photovoltaic string A, and after the MPPT voltage stabilizes, disconnect the closed bypass switch 1 and bypass switch 2, and wait for the MPPT voltage to stabilize. After stabilization, the DC power of the MPPT at this time is recorded and recorded as the MPPT power after the second recovery; and so on, a bypass switch is added each time a short circuit occurs. When the nth short circuit occurs (n is an integer less than or equal to the number of bypass switches), the PV string A has a total of n bypass switches closed (bypass switches 1 to n), and then the closed bypass switches 1 to bypass switches n are disconnected to obtain the MPPT power after the nth recovery. The above process is repeated until all bypass switches (bypass switches 1 to 10) of the PV string A are closed and disconnected, and the short circuit process is stopped; then the recorded MPPT power after the first recovery, the MPPT power after the second recovery, and the MPPT power after other multiple recoveries are combined into multiple candidate MPPT powers.

[0058] 407. Short-circuit some photovoltaic modules in the target MPPT according to the maximum MPPT power among the multiple candidate MPPT powers, so that the inverter searches for a global maximum power point within a preset range of the maximum MPPT power.

[0059] Specifically, the global maximum power point finding device compares the power sizes of multiple candidate MPPT powers to obtain the maximum MPPT power, and each candidate MPPT power corresponds to a short-circuit number; the global maximum power point finding device short-circuits the corresponding photovoltaic components in the target MPPT according to the short-circuit number corresponding to the maximum MPPT power, so that the inverter finds the global maximum power point within a preset range of the maximum MPPT power.

[0060] Optionally, the global maximum power point finding device short-circuits corresponding photovoltaic components in the target MPPT according to the number of short-circuit times corresponding to the maximum MPPT power value, including the following steps: the global maximum power point finding device determines the target number of short-circuit times corresponding to the maximum MPPT power value, the number of bypass switches corresponding to the current number of short-circuit times is one more than the number of bypass switches of the previous number of short-circuit times; the global maximum power point finding device closes each bypass switch corresponding to the target number of short-circuit times, so that multiple target photovoltaic components are in a short-circuit state, and the target photovoltaic components are photovoltaic components connected in parallel with the bypass switches in a closed state.

[0061] It can be understood that the candidate MPPT power determined after each short circuit and recovery is equivalent to redetermining a local maximum power point (a peak on the MPPT IV curve). Then multiple candidate MPPT powers correspond to multiple local maximum power points. By selecting a maximum value among the multiple local maximum power points, it can be located near the global maximum power point.

[0062] It should be noted that in the embodiment of the present application, there is no need to rely on the global scanning function of the inverter itself, and there is no need to start the global scan regularly, which can significantly improve the power generation of the inverter in the shadow occlusion scene.

[0063] The embodiment of the present application determines a target MPPT that is trapped in a local maximum power point in the inverter, performs multiple short-circuit and recovery operations on some components in the target MPPT to determine the maximum MPPT power, and uses the maximum MPPT power as a benchmark to find the global maximum power point of the target MPPT. This solves the problem that finding the global maximum power point depends on the inverter's own global scanning function, thereby achieving the effect of reducing the hardware requirements for finding the global maximum power point.

[0064] See also Figure 5 , another flow chart of the global maximum power point finding method provided by an embodiment of the present application, specifically includes:

[0065] 501. Obtaining operation data of the inverter, the operation data including the voltage of each MPPT and the current of each photovoltaic string in each MPPT, the inverter includes multiple MPPTs, and each MPPT includes multiple photovoltaic strings.

[0066] 502. Determine the MPPT average voltage and MPPT average current corresponding to each MPPT based on a preset time window, the voltage of each MPPT, and the current of each photovoltaic string in each MPPT.

[0067] 503. Determine a minimum MPPT average voltage and a maximum MPPT average current corresponding to the inverter based on the MPPT average voltage and the MPPT average current corresponding to each MPPT.

[0068] 504. Determine an MPPT that meets preset conditions among the multiple MPPTs as a target MPPT. The preset conditions are that the MPPT average voltage is greater than the product of the minimum MPPT average voltage and the first coefficient, and the MPPT average current is less than the product of the maximum MPPT average current and the second coefficient.

[0069] 505. Determine whether the inverter has a global scanning function.

[0070] 506. If the inverter does not have a global scanning function, short-circuit and restore some photovoltaic modules of the target MPPT multiple times through multiple preset bypass switches, and determine the MPPT power after each restoration to obtain multiple candidate MPPT powers.

[0071] 507. Short-circuit some photovoltaic modules in the target MPPT according to the maximum MPPT power among the multiple candidate MPPT powers, so that the inverter searches for a global maximum power point within a preset range of the maximum MPPT power.

[0072] Steps 501-507 are similar to steps 401-407 and are not described again here.

[0073] 508. If the inverter has a global scanning function, start the global scanning function of the inverter so that the inverter can find the global maximum power point of the target MPPT.

[0074] If the inverter has a global scanning function, the global maximum power point finding device starts the global scanning function of the inverter so that the inverter finds the global maximum power point of the target MPPT.

[0075] It should be noted that when the photovoltaic string is partially shaded, the IV curve of the MPPT presents a multi-peak characteristic. Through global scanning, the power generation in the shadow-shading scene can be significantly improved. In the embodiment of the present application, the global scanning function is started for the inverter with the global scanning function only when there is shadow-shading and the target MPPT falls into the local maximum power point, which avoids the frequent activation of the global scanning function in the unshaded scene and reduces the power loss during the global scanning process in the unshaded scene.

[0076] The embodiment of the present application determines a target MPPT that is trapped in a local maximum power point in the inverter, performs multiple short-circuit and recovery operations on some components in the target MPPT to determine the maximum MPPT power, and uses the maximum MPPT power as a benchmark to find the global maximum power point of the target MPPT. This solves the problem that finding the global maximum power point depends on the inverter's own global scanning function, thereby achieving the effect of reducing the hardware requirements for finding the global maximum power point.

[0077] The above describes the method for finding the global maximum power point in the embodiment of the present application. The following describes the device for finding the global maximum power point in the embodiment of the present application. Figure 6 , an embodiment of the global maximum power point search device in the embodiment of the present application includes:

[0078] An acquisition module 601 is used for acquiring the operating data of the inverter, wherein the operating data includes the voltage of each MPPT and the current of each photovoltaic string in each MPPT, wherein the inverter includes multiple MPPTs, and each MPPT includes multiple photovoltaic strings;

[0079] A determination module 602 is used to determine a target MPPT based on the voltage of each MPPT and the current of each photovoltaic string in each MPPT, wherein the target MPPT is an MPPT that falls into a local maximum power point;

[0080] A judging module 603 is used to judge whether the inverter has a global scanning function;

[0081] The short-circuit recovery module 604 is used to perform multiple short-circuit and recovery operations on some photovoltaic modules of the target MPPT through multiple preset bypass switches if the inverter does not have a global scanning function, and determine the MPPT power after each recovery to obtain multiple candidate MPPT powers;

[0082] The short-circuit module 605 is used to short-circuit some photovoltaic modules in the target MPPT according to the maximum MPPT power among the multiple candidate MPPT powers, so that the inverter can find the global maximum power point within a preset range of the maximum MPPT power.

[0083] In a feasible implementation manner, the determination module 602 includes:

[0084] The first determining unit 6021 is used to determine the MPPT average voltage and MPPT average current corresponding to each MPPT based on a preset time window, the voltage of each MPPT and the current of each photovoltaic string in each MPPT;

[0085] The second determining unit 6022 is used to determine the minimum MPPT average voltage and the maximum MPPT average current corresponding to the inverter based on the MPPT average voltage and the MPPT average current corresponding to each MPPT;

[0086] The third determination unit 6023 is used to determine the MPPT that meets the preset conditions in the multiple MPPTs as the target MPPT, and the preset conditions are that the MPPT average voltage is greater than the product of the minimum MPPT average voltage and the first coefficient, and the MPPT average current is less than the product of the maximum MPPT average current and the second coefficient.

[0087] In a feasible implementation manner, the first determining unit 6021 is specifically configured to:

[0088] Take the average value of the voltage of each MPPT within the preset time window to obtain the MPPT average voltage corresponding to each MPPT;

[0089] Taking the average value of each photovoltaic string current within a preset time window to obtain the string average current of each photovoltaic string;

[0090] The average string current of each photovoltaic string is averaged according to the MPPT to which it belongs, and the MPPT average current corresponding to each MPPT is obtained.

[0091] In a feasible implementation manner, the short circuit recovery module 604 is specifically used for:

[0092] If the inverter does not have a global scanning function, a first bypass switch is closed in a preset plurality of bypass switches according to a switching sequence, so that a photovoltaic assembly connected in parallel with the first bypass switch is short-circuited;

[0093] After the current voltage of the target MPPT is stabilized, disconnecting the first bypass switch so that the photovoltaic assembly connected in parallel with the first bypass switch resumes normal operation;

[0094] After the current voltage of the target MPPT is restored to stability, determining the MPPT power after the first restoration;

[0095] Closing a first bypass switch and a second bypass switch in a switching sequence among a plurality of preset bypass switches, so as to short-circuit photovoltaic components respectively connected in parallel with the first bypass switch and the second bypass switch;

[0096] After the current voltage of the target MPPT is stabilized, disconnecting the first bypass switch and the second bypass switch, so that the photovoltaic components respectively connected in parallel with the first bypass switch and the second bypass switch resume normal operation;

[0097] After the current voltage of the target MPPT is restored to stability, determining the MPPT power after the second restoration;

[0098] Closing and opening the plurality of bypass switches multiple times according to a preset rule to determine the MPPT power after other multiple restorations, wherein the preset rule is that the number of switches closed each time is one more than the number of switches closed last time, until all the bypass switches are closed and opened at the same time;

[0099] The MPPT power after the first recovery, the MPPT power after the second recovery, and the MPPT power after other multiple recovery are combined to obtain multiple candidate MPPT powers.

[0100] In a feasible implementation manner, the short-circuit module 605 includes:

[0101] A comparison unit 6051 is used to compare the power sizes of the multiple candidate MPPT powers to obtain a maximum MPPT power, each candidate MPPT power corresponding to a short circuit number;

[0102] The short-circuit unit 6052 is used to short-circuit the corresponding photovoltaic components in the target MPPT according to the number of short-circuits corresponding to the maximum MPPT power.

[0103] In a feasible implementation manner, the short-circuit unit 6052 is specifically used for:

[0104] Determine the target short-circuit number corresponding to the maximum value of the MPPT power, the number of bypass switches corresponding to the current short-circuit number is one more than the number of bypass switches corresponding to the previous short-circuit number;

[0105] Each bypass switch corresponding to the target short-circuit number is closed to put a plurality of target photovoltaic assemblies in a short-circuit state, wherein the target photovoltaic assemblies are photovoltaic assemblies connected in parallel with the bypass switches in a closed state.

[0106] In a feasible implementation manner, the global maximum power point finding device further includes:

[0107] The starting module 606 is used to start the global scanning function of the inverter if the inverter has a global scanning function, so that the inverter can find the global maximum power point of the target MPPT.

[0108] The embodiment of the present application determines a target MPPT that is trapped in a local maximum power point in the inverter, performs multiple short-circuit and recovery operations on some components in the target MPPT to determine the maximum MPPT power, and uses the maximum MPPT power as a benchmark to find the global maximum power point of the target MPPT. This solves the problem that finding the global maximum power point depends on the inverter's own global scanning function, thereby achieving the effect of reducing the hardware requirements for finding the global maximum power point.

[0109] See also Figure 7 As shown, the electronic device includes a processor 700 and a memory 701 , wherein the memory 701 stores machine executable instructions that can be executed by the processor 700 , and the processor 700 executes the machine executable instructions to implement the above-mentioned global maximum power point finding method.

[0110] Further, Figure 7 The electronic device shown further includes a bus 702 and a communication interface 703 , and the processor 700 , the communication interface 703 and the memory 701 are connected via the bus 702 .

[0111] The memory 701 may include a high-speed random access memory (RAM), and may also include a non-volatile memory (non-volatile memory), for example, at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 703 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 702 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 7 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0112] The processor 700 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 700. The above processor 700 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor to be executed, or the hardware and software modules in the decoding processor can be executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 701 , and the processor 700 reads the information in the memory 701 and completes the method steps of the above-mentioned embodiment in combination with its hardware.

[0113] The present application also provides a computer-readable storage medium, which may be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium. The computer-readable storage medium stores instructions. When the instructions are executed on a computer, the computer executes the steps of the global maximum power point finding method, which specifically include:

[0114] The operation data of the inverter is obtained, and the operation data includes the voltage of each MPPT and the current of each photovoltaic string in each MPPT. The inverter includes multiple MPPTs, and each MPPT includes multiple photovoltaic strings. The target MPPT is determined based on the voltage of each MPPT and the current of each photovoltaic string in each MPPT, and the target MPPT is the MPPT that falls into a local maximum power point. It is judged whether the inverter has a global scanning function. If the inverter does not have a global scanning function, some photovoltaic components of the target MPPT are short-circuited and restored multiple times through multiple preset bypass switches, and the MPPT power after each recovery is determined to obtain multiple candidate MPPT powers. According to the maximum MPPT power among the multiple candidate MPPT powers, some photovoltaic components in the target MPPT are short-circuited, so that the inverter can find the global maximum power point within a preset range of the maximum MPPT power. The embodiment of the present application determines a target MPPT that is trapped in a local maximum power point in the inverter, performs multiple short-circuit and recovery operations on some components in the target MPPT to determine the maximum MPPT power, and uses the maximum MPPT power as a benchmark to find the global maximum power point of the target MPPT. This solves the problem that finding the global maximum power point depends on the inverter's own global scanning function, thereby achieving the effect of reducing the hardware requirements for finding the global maximum power point.

[0115] The above-mentioned determination of the target MPPT based on the voltage of each MPPT and the current of each photovoltaic string in each MPPT includes: determining the MPPT average voltage and MPPT average current corresponding to each MPPT based on a preset time window, the voltage of each MPPT and the current of each photovoltaic string in each MPPT; determining the minimum MPPT average voltage and the maximum MPPT average current corresponding to the inverter based on the MPPT average voltage and the MPPT average current corresponding to each MPPT; determining the MPPT that meets the preset conditions among the multiple MPPTs as the target MPPT, and the preset conditions are that the MPPT average voltage is greater than the product of the minimum MPPT average voltage and the first coefficient, and the MPPT average current is less than the product of the maximum MPPT average current and the second coefficient.

[0116] The above-mentioned method of determining the MPPT average voltage and MPPT average current corresponding to each MPPT based on the preset time window, the voltage of each MPPT and the current of each photovoltaic string in each MPPT includes: taking the average value of the voltage of each MPPT in the preset time window to obtain the MPPT average voltage corresponding to each MPPT; taking the average value of the current of each photovoltaic string in the preset time window to obtain the string average current of each photovoltaic string; taking the average value of the string average current of each photovoltaic string according to the MPPT to which it belongs, to obtain the MPPT average current corresponding to each MPPT.

[0117] If the inverter does not have a global scanning function, the partial photovoltaic modules of the target MPPT are short-circuited and restored multiple times through multiple preset bypass switches, and the MPPT power after each recovery is determined to obtain multiple candidate MPPT powers, including: if the inverter does not have a global scanning function, the first bypass switch is closed in the preset multiple bypass switches in a switching sequence to short-circuit the photovoltaic modules connected in parallel with the first bypass switch; after the current voltage of the target MPPT is stable, the first bypass switch is disconnected to restore the photovoltaic modules connected in parallel with the first bypass switch to normal operation; after the current voltage of the target MPPT is restored to stability, the MPPT power after the first recovery is determined; the first bypass switch and the second bypass switch are closed in the preset multiple bypass switches in a switching sequence to short-circuit the photovoltaic modules connected in parallel with the first bypass switch, respectively. The first bypass switch and the photovoltaic components connected in parallel with the second bypass switch are short-circuited; after the current voltage of the target MPPT is stable, the first bypass switch and the second bypass switch are disconnected so that the photovoltaic components connected in parallel with the first bypass switch and the second bypass switch respectively resume normal operation; after the current voltage of the target MPPT is stabilized again, the MPPT power after the second recovery is determined; according to the preset rules, multiple bypass switches are closed and opened multiple times to determine the MPPT power after other multiple recoveries, wherein the preset rule is that the number of switches closed each time is one more than the number of switches closed last time, until all bypass switches are closed and opened at the same time; the MPPT power after the first recovery, the MPPT power after the second recovery and the MPPT power after other multiple recoveries are combined to obtain multiple candidate MPPT powers.

[0118] The above-mentioned short-circuiting of some photovoltaic modules in the target MPPT according to the maximum MPPT power among multiple candidate MPPT powers includes: comparing the power sizes of multiple candidate MPPT powers to obtain the maximum MPPT power, each candidate MPPT power corresponds to a short-circuit number; short-circuiting the corresponding photovoltaic modules in the target MPPT according to the short-circuit number corresponding to the maximum MPPT power.

[0119] The above-mentioned short-circuiting the corresponding photovoltaic components in the target MPPT according to the number of short-circuit times corresponding to the maximum MPPT power includes: determining the target number of short-circuit times corresponding to the maximum MPPT power, the number of bypass switches corresponding to the current number of short-circuit times is one more than the number of bypass switches of the previous number of short-circuit times; closing each bypass switch corresponding to the target short-circuit times, so that multiple target photovoltaic components are in a short-circuit state, and the target photovoltaic components are photovoltaic components connected in parallel with the bypass switches in a closed state.

[0120] After determining whether the inverter has the global scanning function, the method further includes: if the inverter has the global scanning function, starting the global scanning function of the inverter so that the inverter searches for the global maximum power point of the target MPPT.

[0121] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0122] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0123] In the description of the present application, the terms “first”, “second” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0124] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art who is familiar with the technical field can still modify the technical solutions recorded in the above embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for finding a global maximum power point, characterized in that: include: Acquire operation data of the inverter, the operation data including the voltage of each MPPT and the current of each photovoltaic string in each MPPT, the inverter includes multiple MPPTs, and each MPPT includes multiple photovoltaic strings; Determine a target MPPT based on the voltage of each MPPT and the current of each photovoltaic string in each MPPT, wherein the target MPPT is an MPPT that falls into a local maximum power point; Determining whether the inverter has a global scanning function; If the inverter does not have a global scanning function, a portion of the photovoltaic components of the target MPPT are short-circuited and restored multiple times through multiple preset bypass switches, and the MPPT power after each recovery is determined to obtain multiple candidate MPPT powers; According to the maximum MPPT power among the multiple candidate MPPT powers, some photovoltaic modules in the target MPPT are short-circuited so that the inverter can find the global maximum power point within a preset range of the maximum MPPT power.

2. The method for finding the global maximum power point according to claim 1, characterized in that: The determining the target MPPT based on the voltage of each MPPT and the current of each photovoltaic string in each MPPT includes: Determine the MPPT average voltage and MPPT average current corresponding to each MPPT based on the preset time window, the voltage of each MPPT and the current of each photovoltaic string in each MPPT; Determine the minimum MPPT average voltage and the maximum MPPT average current corresponding to the inverter based on the MPPT average voltage and the MPPT average current corresponding to each MPPT; The MPPT that meets the preset conditions in the multiple MPPTs is determined as the target MPPT, and the preset conditions are that the MPPT average voltage is greater than the product of the minimum MPPT average voltage and the first coefficient, and the MPPT average current is less than the product of the maximum MPPT average current and the second coefficient.

3. The method for finding the global maximum power point according to claim 2, characterized in that: The determining of the MPPT average voltage and MPPT average current corresponding to each MPPT based on the preset time window, the voltage of each MPPT and the current of each photovoltaic string in each MPPT includes: Take the average value of the voltage of each MPPT within the preset time window to obtain the MPPT average voltage corresponding to each MPPT; Taking the average value of each photovoltaic string current within a preset time window to obtain the string average current of each photovoltaic string; The average string current of each photovoltaic string is averaged according to the MPPT to which it belongs, and the MPPT average current corresponding to each MPPT is obtained.

4. The method for finding the global maximum power point according to claim 1, characterized in that: If the inverter does not have a global scanning function, a portion of the photovoltaic components of the target MPPT are short-circuited and restored multiple times through multiple preset bypass switches, and the MPPT power after each recovery is determined to obtain multiple candidate MPPT powers, including: If the inverter does not have a global scanning function, a first bypass switch is closed in a preset plurality of bypass switches according to a switching sequence, so that a photovoltaic assembly connected in parallel with the first bypass switch is short-circuited; After the current voltage of the target MPPT is stabilized, disconnecting the first bypass switch so that the photovoltaic assembly connected in parallel with the first bypass switch resumes normal operation; After the current voltage of the target MPPT is restored to stability, determining the MPPT power after the first restoration; Closing a first bypass switch and a second bypass switch in a switching sequence among a plurality of preset bypass switches, so as to short-circuit photovoltaic components respectively connected in parallel with the first bypass switch and the second bypass switch; After the current voltage of the target MPPT is stabilized, disconnecting the first bypass switch and the second bypass switch, so that the photovoltaic components respectively connected in parallel with the first bypass switch and the second bypass switch resume normal operation; After the current voltage of the target MPPT is restored to stability, determining the MPPT power after the second restoration; Closing and opening the plurality of bypass switches multiple times according to a preset rule to determine the MPPT power after other multiple restorations, wherein the preset rule is that the number of switches closed each time is one more than the number of switches closed last time, until all the bypass switches are closed and opened at the same time; The MPPT power after the first recovery, the MPPT power after the second recovery, and the MPPT power after other multiple recovery are combined to obtain multiple candidate MPPT powers.

5. The method for finding the global maximum power point according to claim 1, characterized in that: The short-circuiting of some photovoltaic modules in the target MPPT according to the maximum MPPT power among the multiple candidate MPPT powers includes: Compare the power sizes of the multiple candidate MPPT powers to obtain the maximum MPPT power, each candidate MPPT power corresponding to a short circuit number; The corresponding photovoltaic components in the target MPPT are short-circuited according to the number of short-circuits corresponding to the maximum MPPT power.

6. The method for finding the global maximum power point according to claim 5, characterized in that: The short-circuiting the corresponding photovoltaic components in the target MPPT according to the number of short-circuits corresponding to the maximum MPPT power includes: Determine the target short-circuit number corresponding to the maximum value of the MPPT power, the number of bypass switches corresponding to the current short-circuit number is one more than the number of bypass switches corresponding to the previous short-circuit number; Each bypass switch corresponding to the target short-circuit number is closed to put a plurality of target photovoltaic assemblies in a short-circuit state, wherein the target photovoltaic assemblies are photovoltaic assemblies connected in parallel with the bypass switches in a closed state.

7. The method for finding the global maximum power point according to any one of claims 1 to 6, characterized in that: After determining whether the inverter has a global scanning function, the method further includes: If the inverter has a global scanning function, the global scanning function of the inverter is started so that the inverter searches for the global maximum power point of the target MPPT.

8. A global maximum power point finding device, characterized in that: include: An acquisition module is used to acquire the operation data of the inverter, wherein the operation data includes the voltage of each MPPT and the current of each photovoltaic string in each MPPT, wherein the inverter includes multiple MPPTs, and each MPPT includes multiple photovoltaic strings; A determination module, configured to determine a target MPPT based on the voltage of each MPPT and the current of each photovoltaic string in each MPPT, wherein the target MPPT is an MPPT that falls into a local maximum power point; A judging module, used to judge whether the inverter has a global scanning function; A short-circuit recovery module, which is used to perform multiple short-circuit and recovery operations on some photovoltaic modules of the target MPPT through multiple preset bypass switches if the inverter does not have a global scanning function, and determine the MPPT power after each recovery to obtain multiple candidate MPPT powers; The short-circuit module is used to short-circuit some photovoltaic modules in the target MPPT according to the maximum MPPT power among the multiple candidate MPPT powers, so that the inverter can find the global maximum power point within a preset range of the maximum MPPT power.

9. An electronic device, characterized in that: The electronic device comprises: a memory and at least one processor, the memory stores instructions, and the memory and the at least one processor are interconnected via a line; The at least one processor calls the instructions in the memory to enable the electronic device to execute the global maximum power point finding method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed by a processor, the global maximum power point finding method according to any one of claims 1 to 7 is implemented.

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