Photovoltaic power generation system

Abstract

A photovoltaic power generation system (10), comprising at least one photovoltaic power generation module (1010). The photovoltaic power generation module comprises at least two photovoltaic modules (11) and an adapter cable (1011). Each photovoltaic module comprises a connecting cable (1035b); the input end of the connecting cable is connected to a positive electrode (1033a) and a negative electrode (1033b) of the corresponding photovoltaic module, two male connectors or two female connectors are arranged at the output end of the connecting cable, and the two male connectors or the two female connectors are respectively a positive electrode and a negative electrode of the output end of the connecting cable; the connecting cables of the at least two photovoltaic modules are connected to a direct-current bus by means of the adapter cable. The adapter cable comprises at least two sub-connecting ends (1011b) adapted to be correspondingly connected to the output ends of the connecting cables.

Description

Photovoltaic power generation system

[0001] Priority information

[0002] This application claims priority and benefits of patent application No. 202420103414.6 filed with the State Intellectual Property Office of China on January 15, 2024, and the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the field of solar photovoltaic technology, and in particular to a photovoltaic power generation system. Background Art

[0004] Photovoltaic power generation systems typically include multiple photovoltaic modules, which are connected in series and / or in parallel. However, these modules are typically connected via cables with positive and negative poles located at either end, such as MC4 cables. This results in cumbersome wiring operations and a complex wiring structure. Summary of the Invention

[0005] In view of the above problems, the present application provides a power generation system, which can simplify the wiring structure of the photovoltaic power generation system by connecting multiple photovoltaic modules using connecting wires with positive and negative poles arranged on the same end.

[0006] The present application provides a photovoltaic power generation system, comprising at least one photovoltaic power generation module, the photovoltaic power generation module comprising at least two photovoltaic components and an adapter cable, each photovoltaic component comprising a connecting cable, the input end of the connecting cable being connected to the positive and negative poles of the photovoltaic component, the output end of the connecting cable being provided with two male or two female connectors, the two male or two female connectors being the positive and negative poles of the output end of the connecting cable, respectively, the connecting cables of at least two photovoltaic components being connected to a DC bus via an adapter cable, the adapter cable comprising at least two branch connecting terminals for corresponding connection to the output ends of the connecting cables. By providing a connecting cable with two male or two female connectors at the output end, and connecting the connecting cable to the DC bus via an adapter cable having a structure corresponding to the dual male or dual female connectors at the output end, the length of the connecting cables between multiple photovoltaic components can be shortened, thereby optimizing the wiring design of the photovoltaic power generation system.

[0007] In a possible implementation, the adapter line further includes a main terminal for connecting to the DC bus, and at least two branch connection terminals are provided on the adapter line, and the at least two branch connection terminals are both electrically connected to the main terminal.

[0008] In a possible implementation, at least two tap terminals are connected in series and then connected to a main terminal, so that at least two photovoltaic modules are connected in series to the DC busbar through corresponding tap terminals.

[0009] In a possible implementation, at least two branch connection terminals are connected in parallel and then connected to the main terminal, so that at least two photovoltaic modules are connected in parallel to the DC busbar through corresponding branch connection terminals.

[0010] In a possible implementation, the patch cord further includes a cross point, and each branch connection end is electrically connected to the main terminal through the cross point.

[0011] In a possible implementation, at least two tap terminals are connected in series to a cross point and then to a main terminal, so that at least two photovoltaic modules are connected in series to the DC busbar through corresponding tap terminals.

[0012] In a possible implementation, at least two branch connection terminals are connected in parallel to the intersection point and then to the main terminal, so that at least two photovoltaic modules are connected in parallel to the DC busbar through the corresponding branch connection terminals.

[0013] In one possible implementation, the photovoltaic module includes a curved photovoltaic tile, which includes a curved panel, a power generation layer and a junction box. The curved panel includes one or more curved surfaces. The power generation layer is used to electrically connect the connecting wires. The junction box is used to accommodate the connecting wires, and the junction box is arranged in a convex cavity formed by one or more curved surfaces.

[0014] In a possible implementation, the number of the at least one photovoltaic power generation module is at least two, the photovoltaic components in the at least two photovoltaic power generation modules are connected in series, and the at least two photovoltaic power generation modules are connected in parallel to a DC bus.

[0015] In a possible implementation, the power generation system further includes a conversion circuit connected to the DC bus, and the conversion circuit is configured to perform voltage conversion on the DC bus voltage.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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:

[0018] FIG1 is a schematic diagram of a plurality of photovoltaic modules connected by connecting wires with positive and negative electrodes respectively provided at both ends of the cable;

[0019] FIG2 is a schematic diagram of a photovoltaic power generation system provided by this application;

[0020] FIG3 is a structural diagram of a photovoltaic module provided by the present application as a curved photovoltaic tile;

[0021] FIG4 is a schematic diagram of a connection of multiple photovoltaic modules provided by the present application;

[0022] FIG5 is another connection diagram of multiple photovoltaic modules provided by the present application;

[0023] FIG6 is a structural diagram of a total terminal connector of a "I"-shaped bipolar adapter cable;

[0024] FIG7 is another structural diagram of the total extreme terminal connector of the "I"-shaped bipolar adapter cable;

[0025] FIG8 is another connection diagram of multiple photovoltaic modules provided by the present application;

[0026] FIG9 is another connection diagram of multiple photovoltaic modules provided by the present application;

[0027] Figure 10 is a schematic diagram of the structure of a "Y"-shaped bipolar adapter cable;

[0028] FIG11 is a schematic diagram of a power generation source.

[0029] Reference numerals: Photovoltaic power generation system 10, photovoltaic modules 11, 1010a, positive terminal 111, negative terminal 112, connecting wire 12, photovoltaic power generation system 100, energy storage device 100a, power generation source 101, conversion circuit 102, curved photovoltaic tile 103, curved panel 1031, first wave crest surface 1031a, first wave valley surface 1031b, second wave crest surface 1031c, connecting layer 1032, power generation layer 1033, positive electrode 1033a , negative pole 1033b, back plate 1034, through hole 1034a, through hole 1034b, junction box 1035, welding pad 1035a, connecting wire 1035b, photovoltaic power generation module 1010, "I"-shaped bipolar adapter cable 1011, total pole 1011a, total positive pole 1011a_1, total negative pole 1011a_2, branch connection terminal 1011b, "Y"-shaped bipolar adapter cable 1012, intersection 1012a. DETAILED DESCRIPTION

[0030] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0031] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. The embodiments of the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the embodiments of the present application provide examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0032] Photovoltaic power generation systems typically include multiple photovoltaic modules, which are connected in series and / or in parallel. However, these modules are typically connected via cables with positive and negative poles located at either end, such as MC4 cables. This results in cumbersome wiring operations and a complex wiring structure.

[0033] Specifically, referring to FIG1 , a photovoltaic power generation system 10 includes a plurality of photovoltaic modules 11, each of which includes a positive terminal 111 and a negative terminal 112. Taking series connection as an example, the positive terminal 111 of each photovoltaic module 11 is electrically connected to the negative terminal 112 of another photovoltaic module 11 via a connecting wire 12, that is, the negative terminal 112 of each photovoltaic module 11 is electrically connected to the positive terminal 111 of another photovoltaic module 11 via a connecting wire 12, thereby realizing a plurality of photovoltaic modules 11 being connected in series in sequence. The two ends of the connecting wire 12 are respectively a positive pole and a negative pole, the positive pole of the connecting wire 12 is electrically connected to the negative terminal 112 of the photovoltaic module 11, and the negative pole of the connecting wire 12 is electrically connected to the positive terminal 111 of the photovoltaic module 11. Since each photovoltaic module 11 needs to be electrically connected via the connecting wire 12, the operation is cumbersome and the wiring is complicated.

[0034] Therefore, the present application provides a power generation system that can simplify the wiring structure of the photovoltaic power generation system by connecting multiple photovoltaic modules using connecting wires with positive and negative poles arranged on the same end.

[0035] Please refer to FIG2 , which is a schematic diagram of a photovoltaic power generation system 100 provided in this application. The photovoltaic power generation system 100 includes a power generation source 101 and a conversion circuit 102 .

[0036] The power source 101 is electrically connected to the conversion circuit 102. The power source 101 is used to output a voltage, which is converted by the conversion circuit 102 and then output to an external device.

[0037] In which, the power generation source 101 may include multiple photovoltaic modules, and the multiple photovoltaic modules are connected in series and / or in parallel to form multiple photovoltaic subsystems. The multiple photovoltaic subsystems are connected in series and / or in parallel and then connected to a DC bus to provide a DC bus voltage as the input voltage of the conversion circuit 102.

[0038] In some embodiments, the conversion circuit 102 may be a DC-DC conversion circuit, a DC-AC conversion circuit, or the like. For example, when the conversion circuit 102 is a DC-DC conversion circuit, it may perform DC voltage conversion to step up or step down the DC voltage output by the power generation source 101 and then supply DC power to an external device. Here, the external device may be a device that receives DC power, such as a DC load, an energy storage device, or a battery. For example, the energy storage device 100a shown in the figure. For another example, when the conversion circuit 102 is a DC-AC conversion circuit, it may perform inversion conversion to convert the DC power output by the power generation source 101 into AC power and then supply AC power to an external device. Here, the external device may be a device or structure that receives AC power, such as an AC load or a power grid.

[0039] In some embodiments, the conversion circuit 102 includes both a DC-DC conversion circuit and a DC-AC conversion circuit.

[0040] In some embodiments, the power generation source 101 can be electrically connected to the conversion circuit 102 via a switching circuit. The switching circuit is used to at least partially open or close the electrical connection between the multiple photovoltaic modules in the power generation source 101 and the conversion circuit 102, thereby enhancing the operational stability of the photovoltaic power generation system 100. For example, in the event of an abnormal grid voltage, the switching circuit can at least partially disconnect the electrical connection between the multiple photovoltaic modules and the conversion circuit 102, thereby reducing the output voltage of the photovoltaic power generation system 100 to the grid, or stopping the photovoltaic power generation system 100 from outputting electrical energy to the grid to mitigate the impact of the abnormal grid voltage. For another example, in the event of an abnormal DC bus voltage, the switching circuit can at least partially disconnect the electrical connection between the multiple photovoltaic modules and the conversion circuit 102, thereby adjusting the DC bus voltage accordingly to normalize the DC bus voltage as quickly as possible. For another example, in the event of a partial or complete failure of the photovoltaic modules, the switching circuit can disconnect the faulty photovoltaic module from the conversion circuit 102, thereby preventing the faulty photovoltaic module from affecting the DC bus voltage or other intact photovoltaic modules and facilitating timely repair of the faulty photovoltaic module.

[0041] In some embodiments, the photovoltaic module may be an electronic component such as a curved photovoltaic tile that generates electricity through photovoltaic technology.

[0042] For example, see Figure 3, which illustrates the structure of a curved photovoltaic tile 103, a photovoltaic module provided herein. Curved photovoltaic tile 103 includes a curved panel 1031, a connecting layer 1032, a power generation layer 1033, a backsheet 1034, and a junction box 1035. Curved panel 1031, connecting layer 1032, power generation layer 1033, connecting layer 1032, backsheet 1034, and junction box 1035 are stacked in sequence to form curved photovoltaic tile 103.

[0043] The curved panel 1031 is a panel with a curved surface. The curved surface can be a single crested curved surface or multiple crested curved surfaces. For example, the curved panel 1031 includes a first crest surface 1031a, a first trough surface 1031b, and a second crest surface 1031c, which are connected in sequence to form a curved surface. This allows the curved photovoltaic tile 103 to conform to the building's exterior, creating an aesthetically pleasing design while maximizing the efficiency of solar energy utilization.

[0044] In some embodiments, the material of the curved panel 1031 may include hard polymer materials, rigid glass, etc., which are transparent and have high hardness, and have the advantages of both aesthetics and structural strength.

[0045] The power generation layer 1033 comprises an electrode layer and a current transport layer. The electrode layer, located adjacent to the backplane 1034, includes cells that convert light energy into electricity. The current transport layer is equipped with strip-shaped or sheet-shaped conductors. These conductors are connected to the electrode layer via welding, conductive adhesive, or direct physical connection. These conductors conduct the current generated by the cells from the positive electrode 1033a and negative electrode 1033b of the power generation layer 1033 via leads.

[0046] In some embodiments, the cell can be a full back contact (BC) crystalline silicon photovoltaic cell. Thus, the current transport layer is disposed on the side of the cell facing away from the curved panel 1031 , and the wires can be hidden beneath the cell, enhancing the aesthetics of the curved photovoltaic tile 103 .

[0047] The back plate 1034 is a rigid panel. Through holes 1034a and 1034b are provided on the back plate 1034. Leads for extracting current from the positive electrode 1033a and the negative electrode 1033b of the power generation layer 1033 pass through the through holes 1034a and 1034b, respectively.

[0048] In some embodiments, the backboard 1034 can be a photovoltaic-grade black and white backboard, an all-black backboard, a fiberglass board, an aluminum alloy board, etc., which has the characteristics of high hardness and can ensure the toughness and structural strength of the curved photovoltaic tile 103.

[0049] The connection layer 1032 is disposed between the curved plate 1031 and the power generation layer 1033 , and between the power generation layer 1033 and the back plate 1034 , and is used to bond the curved plate 1031 and the power generation layer 1033 , and between the power generation layer 1033 and the back plate 1034 .

[0050] In some embodiments, the connection layer 1032 may be a photovoltaic adhesive film.

[0051] The junction box 1035 is used to connect the leads passing through through-holes 1034a and 1034b, allowing the electricity generated by the curved photovoltaic tile 103 to be exported to external devices or components such as other curved photovoltaic tiles 103, a DC busbar, and an inverter. Specifically, the junction box 1035 includes two welding pads 1035a and connecting wires 1035b. The two welding pads 1035a are respectively used to weld to the leads leading from the positive electrode 1033a and the negative electrode 1033b of the power generation layer 1033. The connecting wires 1035b are used to connect the leads leading from the positive electrode 1033a and the negative electrode 1033b of the power generation layer 1033 to external devices or components. Among them, the terminal of the lead wire connected to the positive pole 1033a of the power generation layer 1033 in the connecting wire 1035b is the positive pole of the curved photovoltaic tile 103, and the terminal of the lead wire connected to the negative pole 1033b of the power generation layer 1033 in the cable is the negative pole of the curved photovoltaic tile 103.

[0052] Specifically, the connecting wire 1035b is a cable with two male or two female ends at the output end, and each male or female end leads to a positive terminal or a negative terminal, that is, the connecting wire 1035b has a cable structure in which the positive and negative terminals are arranged together at the output end. For example, the output end connector of the connecting wire 1035b can be a DC7909, DC8020, Anderson connector, etc. In this way, compared to the use of two cables as shown in Figure 1 for connecting the positive and negative poles of the photovoltaic component 11 respectively, and the positive and negative poles of the photovoltaic component 11 are connected to the positive or negative pole of other photovoltaic components 11 through one cable respectively, the connecting wire 1035b provided in the present application connects the positive and negative poles of the photovoltaic component 11 only through the two male or female ends of one cable, thereby saving cable length and cost, and simplifying wiring design and installation difficulty.

[0053] In some embodiments, the junction box 1035 can be installed in the convex cavity formed by the first wave crest surface 1031a. This can save installation space for the junction box 1035 and reduce the volume occupied by the curved photovoltaic tile 103. It also facilitates the installation of a photovoltaic subsystem formed by multiple curved photovoltaic tiles 103 connected in series and / or in parallel on a photovoltaic support, and facilitates the wiring of cables connecting multiple curved photovoltaic tiles 103 in series and / or in parallel.

[0054] Please refer to Figure 4, which is a schematic diagram of a connection of multiple photovoltaic assemblies 1010a provided in this application. A power generation source 101 includes multiple photovoltaic power generation modules 1010, each of which includes multiple photovoltaic assemblies 1010a. Each photovoltaic assembly 1010a is connected to a straight-line bipolar adapter cable 1011, thereby enabling each photovoltaic assembly 1010a to be connected in series.

[0055] Specifically, the "I"-shaped bipolar adapter cable 1011 includes multiple connection terminals, one of which is a main terminal 1011a. Main terminal 1011a is located at one end of the cable of the "I"-shaped bipolar adapter cable 1011. Main terminal 1011a includes a main positive terminal 1011a_1 and a main negative terminal 1011a_2 of the connecting line. The remaining connection terminals are branch connection terminals 1011b, each branch connection terminal 1011b also including a corresponding positive terminal and a negative terminal. All branch connection terminals 1011b are located on the cable of the "I"-shaped bipolar adapter cable 1011 at a position other than the main terminal, for example, at the other end of the cable opposite the main terminal, in the middle of the cable, etc.

[0056] Main terminal 1011a and each branch connection terminal 1011b have the same connector structure as the output end of connecting cable 1035b. That is, main terminal 1011a and each branch connection terminal 1011b are also equipped with two male or two female connectors. Each branch connection terminal 1011b is used to electrically connect to the positive and negative poles of photovoltaic module 1010a. Specifically, the positive pole of each branch connection terminal 1011b is electrically connected to the positive pole of photovoltaic module 1010a, and the negative pole of each branch connection terminal 1011b is electrically connected to the negative pole of photovoltaic module 1010a. In this way, the wire leading out from the total positive terminal 1011a_1 of the "I"-shaped bipolar adapter cable 1011 is connected to the corresponding photovoltaic component 1010a through multiple branch connection terminals 1011b in the cable and then connected to the total negative terminal 1011a_2. The multiple photovoltaic components 1010a are actually connected in series, thereby further forming a photovoltaic power generation module 1010, so that the number of photovoltaic components 1010a in the photovoltaic power generation module 1010 can be configured according to the target output voltage of the photovoltaic power generation module 1010, thereby improving the configuration flexibility of the photovoltaic power generation system 10 and meeting the higher target output voltage requirements of the photovoltaic power generation module 1010.

[0057] Please refer to Figure 5, which is another schematic diagram of connecting multiple photovoltaic modules in the power generation source 101 provided by this application. The difference between Figure 5 and Figure 4 is that each photovoltaic module 1010a in Figure 5 is connected in parallel to the "I"-shaped bipolar adapter cable 1011.

[0058] Specifically, the positive terminal of each branch connection terminal 1011b is electrically connected to a wire extending from the main positive terminal 1011a_1, and the negative terminal of each branch connection terminal 1011b is electrically connected to a wire extending from the main negative terminal 1011a_2. In this way, multiple photovoltaic modules 1010a are effectively connected in parallel, further forming a photovoltaic power generation module 1010. This makes it easier to individually repair and replace the photovoltaic modules 1010a within the photovoltaic power generation module 1010, thereby improving the operating efficiency of the photovoltaic power generation system 10.

[0059] Please refer to Figures 6 and 7, which respectively show two structural diagrams of the main terminal 1011a connector of the "I"-shaped bipolar adapter cable 1011. The main terminal 1011a connector includes two rectangular cylindrical structures, corresponding to the main positive terminal 1011a_1 and the main negative terminal 1011a_2 respectively. The main terminal 1011a connector can be formed into a male form as shown in Figure 6 and a female form as shown in Figure 7. Among them, the two rectangular cylindrical structures of the male form extend out of the cable surface, while the two rectangular cylindrical structures of the female form are housed within the cable surface. The form of the main terminal 1011a connector can be flexibly selected according to actual conditions. For example, when the "I"-shaped bipolar adapter cable 1011 is connected to the photovoltaic module 1010a, the connector form corresponding to the main terminal 1011a can be selected according to the positive and negative shapes of the photovoltaic module 1010a.

[0060] Please refer to Figure 8, which shows another connection diagram of multiple photovoltaic modules in power generation source 101. The difference between Figure 8 and Figure 4 is that each photovoltaic module 1010a in Figure 8 is connected to a "Y"-shaped bipolar adapter cable 1012, thereby achieving serial connection of each photovoltaic module 1010a.

[0061] Specifically, the Y-shaped bipolar adapter cable 1012 includes multiple connection terminals and an intersection 1012a. One of the connection terminals is a main terminal 1011a, which is located at one end of the cable of the Y-shaped bipolar adapter cable 1012. The main terminal includes a main positive terminal 1011a_1 and a main negative terminal 1011a_2. The remaining connection terminals are branch connection terminals 1011b, each of which also includes a corresponding positive terminal and a negative terminal. All branch connection terminals 1011b are connected to the intersection 1012a and, through the intersection, to the main terminal 1011a.

[0062] In this way, the wire leading from the total positive terminal 1011a_1 of the "Y"-shaped bipolar adapter cable 1012 passes through the intersection 1012a and one of the branch connection ends 1011b within the cable to connect to the corresponding photovoltaic module 1010a, then returns to the intersection 1012a and then passes through another branch connection end 1011b to connect to the corresponding photovoltaic module 1010a. Similarly, multiple photovoltaic modules 1010a are actually connected in series, thereby further forming a photovoltaic power generation module 1010. In this case, the number of photovoltaic modules 1010a in the photovoltaic power generation module 1010 can be configured according to the target output voltage of the photovoltaic power generation module 1010, thereby improving the configuration flexibility of the photovoltaic power generation system 10 and meeting the higher target output voltage requirements of the photovoltaic power generation module 1010.

[0063] In addition, because the "Y"-shaped bipolar adapter cable 1012 includes a cross point 1012a, the total cable length of multiple photovoltaic components 1010a connected to the cross point 1012a is shorter than the total cable length of multiple photovoltaic components 1010a connected to the "I"-shaped bipolar adapter cable 1011 respectively, thereby requiring less cable material and lower manufacturing costs.

[0064] Please refer to Figure 9, which shows another connection diagram of multiple photovoltaic modules in power generation source 101. The difference between Figure 9 and Figure 8 is that each photovoltaic module 1010a in Figure 8 is connected in parallel to the intersection 1012a of the "Y"-shaped bipolar adapter cable 1012.

[0065] Specifically, the positive terminal in each branch connection terminal 1011b is electrically connected to the wire extending from the total positive terminal 1011a_1 to the intersection 1012a, and the negative terminal in each branch connection terminal 1011b is electrically connected to the wire extending from the total negative terminal 1011a_2 to the intersection 1012a.

[0066] In this way, the wire leading out of the total positive terminal 1011a_1 of the "Y"-shaped bipolar adapter cable 1012 passes through the intersection 1012a and one of the branch connection ends 1011b in the cable and is connected to the corresponding photovoltaic component 1010a, and then returns to the intersection 1012a and is connected to the wire leading out of the total negative terminal 1011a_1. Similarly, multiple photovoltaic components 1010a are actually connected in parallel, thereby further forming a photovoltaic power generation module 1010, so that the photovoltaic components 1010a in the photovoltaic power generation module 1010 are easy to repair and replace separately, thereby improving the working efficiency of the photovoltaic power generation system 10.

[0067] Please refer to Figure 10, which shows a schematic diagram of the structure of a "Y"-shaped bipolar adapter cable 1012. The structures of the main terminal 1011a and the branch connection terminals 1011b are identical to those in Figures 5 and 6 and will not be further described here. A crosspoint 1012a electrically connects the main terminal 1011a to each branch connection terminal 1011b. In other words, multiple branch connection terminals 1011b are connected to the main terminal 1011a via the crosspoint 1012a.

[0068] Please refer to Figure 11, which shows a schematic diagram of power generation source 101. Power generation source 101 includes multiple photovoltaic power generation modules 1010. Each photovoltaic power generation module 1010 includes multiple photovoltaic assemblies 1010a. The multiple photovoltaic assemblies 1010a are connected in series via a Y-shaped bipolar adapter cable 1012 as shown in Figures 7 and 8 to form photovoltaic power generation module 1010. The multiple photovoltaic power generation modules 1010 are connected in parallel via the Y-shaped bipolar adapter cable 1012 and then connected to the conversion circuit 102.

[0069] Since the power generation power and output voltage of a single photovoltaic module 1010a are relatively low, multiple photovoltaic modules 1010a are first connected in series to form a photovoltaic power generation module 1010. This can ensure that the power generation power and output voltage of the photovoltaic power generation module 1010 meet the higher power generation power and voltage requirements, and also ensure that the output voltage of the photovoltaic power generation module 1010 is not higher than the voltage standard for rapid shutdown of the photovoltaic power generation system, for example, 80V.

[0070] In addition, since the cross-sectional area of ​​the connecting wire is related to the maximum current that can flow through the connecting wire, and the output current of a single photovoltaic module 1010a is relatively low, the loop current in the photovoltaic power generation module 1010 formed by connecting multiple photovoltaic modules 1010a in series is still relatively low. Therefore, the connecting cable used to connect multiple photovoltaic modules 1010a in series, such as the "I"-shaped bipolar adapter cable 1011 or the "Y"-shaped bipolar adapter cable 1012, can be selected from connecting cables with smaller cross-sectional areas and wire diameters, thereby reducing the manufacturing cost of the connecting cables.

[0071] It can be understood that the parallel connection between multiple photovoltaic power generation modules 1010 will not increase the system voltage of the photovoltaic power generation system 100, and the output voltage of the photovoltaic power generation module 1010 is not higher than the voltage standard for rapid shutdown of the photovoltaic power generation system. Therefore, the rapid shutdown of the power generation source 101 can be achieved, meeting the electrical safety requirements of the photovoltaic power generation module 1010.

[0072] In some embodiments, multiple photovoltaic modules 1010a can also be connected in parallel via a Y-shaped bipolar adapter cable 1012 as shown in Figures 7 and 8 to form a photovoltaic power generation module 1010. Multiple photovoltaic power generation modules 1010 are connected in series via the Y-shaped bipolar adapter cable 1012 and then connected to the conversion circuit 102. In this case, each photovoltaic power generation module 1010 can be equipped with a corresponding micro-inverter or circuit breaker to achieve rapid shutdown of the power generation source 101.

[0073] Therefore, the photovoltaic power generation system 100 provided in the present application can simplify the wiring structure of the photovoltaic power generation system by using connecting wires with positive and negative poles arranged on the same end to connect multiple photovoltaic modules.

[0074] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that specific features, structures, materials, or characteristics described in conjunction with an embodiment or example are included in at least one embodiment or example of the present application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0075] 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 intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A photovoltaic power generation system, wherein, Comprising at least one photovoltaic power generation module, the photovoltaic power generation module comprising at least two photovoltaic components and jumper wires. Each of the photovoltaic components comprises a connecting wire, an input end of the connecting wire being connected to a positive electrode and a negative electrode of the photovoltaic component, an output end of the connecting wire being provided with two male connectors or two female connectors, the two male connectors or two female connectors being the positive electrode and the negative electrode of the output end of the connecting wire respectively. The connecting wires of the at least two photovoltaic components are connected to a DC bus through the jumper wires, the jumper wires comprising at least two sub-connection ends for correspondingly connecting to the output ends of the connecting wires.

2. The photovoltaic power generation system according to claim 1, wherein The jumper wires further comprise a main connection end for connecting to the DC bus, the at least two sub-connection ends being disposed on the jumper wires, and the at least two sub-connection ends being electrically connected to the main connection end.

3. The photovoltaic power generation system according to claim 2, wherein, The at least two sub-connection ends are connected in series and then connected to the main connection end, such that the at least two photovoltaic components are connected in series to the DC bus through the corresponding sub-connection ends.

4. The photovoltaic power generation system according to claim 2, wherein, The at least two sub-connection ends are connected in parallel and then connected to the main connection end, such that the at least two photovoltaic components are connected in parallel to the DC bus through the corresponding sub-connection ends.

5. The photovoltaic power generation system according to claim 2, wherein The jumper wires further comprise a cross point, and each of the sub-connection ends is electrically connected to the main connection end through the cross point.

6. The photovoltaic power generation system according to claim 5, wherein, The at least two sub-connection ends are sequentially connected in series to the cross point and then connected to the main connection end through the cross point, such that the at least two photovoltaic components are connected in series to the DC bus through the corresponding sub-connection ends.

7. The photovoltaic power generation system according to claim 5, wherein, The at least two sub-connection ends are connected in parallel to the cross point and then connected to the main connection end, such that the at least two photovoltaic components are connected in parallel to the DC bus through the corresponding sub-connection ends.

8. The photovoltaic power generation system according to any one of claims 1 to 7, wherein, The photovoltaic component comprises a curved photovoltaic tile, the curved photovoltaic tile comprising a curved panel, a power generation layer and a junction box. The curved panel comprises one or more arc-shaped curved surfaces, the power generation layer being used for electrically connecting the connecting wire, the junction box being used for accommodating the connecting wire, and the junction box being disposed in a cavity formed by the one or more arc-shaped curved surfaces.

9. The photovoltaic power generation system according to any one of claims 1 to 8, wherein, The number of the at least one photovoltaic power generation module is at least two, the photovoltaic components in the at least two photovoltaic power generation modules are connected in series, and the at least two photovoltaic power generation modules are connected in parallel to the DC bus.

10. The photovoltaic power generation system according to any one of claims 1 to 9, wherein, The photovoltaic power generation system further comprises a conversion circuit, the conversion circuit being connected to the DC bus, the conversion circuit being used for performing voltage conversion on the voltage of the DC bus.

11. The photovoltaic power generation system according to claim 10, wherein, The photovoltaic power generation system further comprises an energy storage device, the energy storage device being electrically connected to the conversion circuit and being used for storing electric energy output by the conversion circuit.

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