Current collection device and distributed power generation system

Abstract

This application relates to a combiner device and a distributed generation system. The combiner device includes: a housing with a mounting opening on its side, the mounting opening communicating with the inner cavity of the housing; an isolation device disposed within the housing, with a grid input line passing through the bottom edge of the housing and extending into the housing to be electrically connected to the isolation device at the mounting opening; and a combiner device disposed within the housing and electrically connected to the isolation device, the combiner device being used to electrically connect to the photovoltaic input line of a photovoltaic module passing through the bottom of the housing and / or the energy storage input line of an energy storage module. Thus, by connecting the grid input line and the combiner device to the side of the housing, the installation height of the combiner device can be reduced, facilitating operation. Simultaneously, the photovoltaic input line and / or energy storage input line pass through the bottom of the housing and connect to the combiner device, allowing for connection within the housing without bending, simplifying the wiring of the photovoltaic and energy storage input lines.

Description

Technical Field

[0001] This application relates to the field of power system technology, and in particular to a combiner device and a distributed generation system. Background Technology

[0002] In current distributed generation systems, combiner units are critical electrical integration devices, and their structural design and wiring methods directly affect installation convenience and operational reliability. Conventional combiner units generally adopt a standard design with grid entry at the bottom, requiring a certain height between the grid entry line and the terminal block. That is, after the grid enters from the bottom of the casing, a certain length of grid entry line needs to be reserved at the bottom of the casing. However, this raises the position of the combiner unit, making it inconvenient for operators to operate and maintain. Moreover, after the grid enters from the bottom of the casing, the photovoltaic and energy storage entry lines can only enter from the side, resulting in limited operating space for wiring. Utility Model Content

[0003] Therefore, it is necessary to address the problems of the current method of using the bottom of the grid to bring in the combiner equipment, which raises the installation position of the combiner equipment and the small operating space caused by the side-entry of photovoltaic and energy storage. This would provide a combiner equipment and distributed generation system that can connect to the grid inlet on the side and reduce the installation height requirements of the combiner equipment. At the same time, it would facilitate the connection of photovoltaic and energy storage inlets.

[0004] A combiner device, comprising:

[0005] A housing having a mounting opening on its side, the mounting opening communicating with the inner cavity of the housing;

[0006] An isolation device is disposed in the housing, and an electrical power supply line passes through the bottom edge of the housing and extends into the housing to be electrically connected to the isolation device at the mounting opening;

[0007] A combiner device is disposed in the housing and electrically connected to the isolation device. The combiner device is used to electrically connect to the photovoltaic input line of the photovoltaic module passing through the bottom of the housing and / or the energy storage input line of the energy storage module.

[0008] In one embodiment of this application, the combiner device includes a first wiring structure, a first connector is provided at the bottom of the housing, the first wiring structure is disposed in the housing, and the photovoltaic input line passes through the first connector and is electrically connected to the first wiring structure;

[0009] And / or, the combiner device further includes a second wiring structure, a second connector is provided at the bottom of the housing, the second wiring structure is disposed in the housing, and the energy storage inlet line passes through the second connector and is electrically connected to the second wiring structure.

[0010] In one embodiment of this application, the first wiring structure includes a first protection switch and a first input terminal. The first input terminal is disposed on the side of the first protection switch facing the first connector, and the photovoltaic input line is electrically connected to the first input terminal and the first protection switch.

[0011] In one embodiment of this application, the incoming power grid line adopts a three-phase three-wire connection method;

[0012] The first wiring structure includes multiple sets of first protection switches and multiple sets of first terminals. Each set of first protection switches includes a first control switch, a second control switch, and a third control switch. Each set of first input terminals includes a first adapter terminal, a second adapter terminal, a third adapter terminal, a fourth adapter terminal, a fifth adapter terminal, and a sixth adapter terminal. Each set of first input terminals connects to three photovoltaic input lines, namely the first photovoltaic input line, the second photovoltaic input line, and the third photovoltaic input line.

[0013] Specifically, the first adapter terminal is electrically connected to the first control switch, the second adapter terminal is electrically connected to the second control switch, the third adapter terminal is electrically connected to the second control switch, the fourth adapter terminal is electrically connected to the third control switch, the fifth adapter terminal is electrically connected to the third control switch, the sixth adapter terminal is electrically connected to the first protection switch, the L-line of the first photovoltaic input line is electrically connected to the first adapter terminal and the N-line is connected to the second adapter terminal, the L-line of the second photovoltaic input line is electrically connected to the third adapter terminal and the N-line is connected to the fourth adapter terminal, and the L-line of the third photovoltaic input line is electrically connected to the fifth adapter terminal and the N-line is connected to the sixth adapter terminal.

[0014] In one embodiment of this application, the second wiring structure includes a second protection switch and a second input terminal. The second input terminal is disposed on the side of the second protection switch facing the first connector, and the energy storage input line is electrically connected to the second input terminal and the second protection switch.

[0015] And / or, the first wiring structure is located between the second wiring structure and the first connector;

[0016] And / or, there is a preset distance between the first wiring structure and the inner wall of the housing, and the energy storage inlet line passes through the preset distance and is electrically connected to the second wiring structure.

[0017] In one embodiment of this application, the busbar further includes a connecting bus and a current acquisition component. The connecting bus is electrically connected to the busbar and the isolation device. The current acquisition component is disposed on the connecting bus and is used to detect the current of the connecting bus.

[0018] And / or, the combiner device further includes a data acquisition unit and a signaling device. The data acquisition unit is communicatively connected to the photovoltaic module and the energy storage module. The signaling device includes a signal conversion terminal and a communication terminal. The communication terminal is communicatively connected to an external communication module to construct a wireless transmission network. The signal conversion terminal is communicatively connected to the data acquisition unit. The signal conversion terminal is capable of receiving external control signals and transmitting the control signals to the data acquisition unit.

[0019] And / or, the combiner device further includes a lightning protection component, which is disposed within the housing;

[0020] And / or, the housing also has a mounting interface for connecting to a switch and a fusion splice tray installed in the housing, and the bottom of the housing also has an optical fiber inlet / outlet connector, through which an optical fiber extends into the housing and is electrically connected to the switch and the fusion splice tray;

[0021] And / or, the housing also has a signal surge protection interface;

[0022] And / or, the combiner device further includes a side cover that covers the mounting opening;

[0023] And / or, the housing includes a mounting shell and a switch door, the isolation device and the busbar device are disposed in the mounting shell, the mounting opening is disposed on the side of the mounting shell, and the switch door is slewably mounted on the mounting shell to open or close the mounting shell.

[0024] In one embodiment of this application, an inlet connector is further provided at the bottom edge of the housing. The inlet connector communicates with the inner cavity of the housing. The inlet connector and the mounting opening are located on the same side of the housing. The power grid inlet can pass through the inlet connector and extend into the housing to be electrically connected to the isolation device at the mounting opening.

[0025] In one embodiment of this application, the isolation device includes a plurality of input terminals, a plurality of air switches, and a plurality of output terminals. The plurality of input terminals are electrically connected to the busbar device, each air switch is electrically connected to the corresponding input terminal and the output terminal, and each output terminal is used to connect to a power grid input line.

[0026] In one embodiment of this application, the combiner device further includes a wave trap, which is disposed on the outside of the housing and located at the mounting opening. The wave trap is electrically connected to the power grid inlet and the isolation device.

[0027] In one embodiment of this application, the wave trap includes a wave trap body, a wave trap housing, and a cover plate. The wave trap housing is installed on the outside of the housing, and the wave trap body is installed in the wave trap housing. The wave trap body includes a first connection terminal and a second connection terminal. The first connection terminal is electrically connected to the isolation device at the mounting opening, and the second connection terminal is electrically connected to the power grid inlet at the mounting opening.

[0028] The wave trap further includes a first sealing element disposed between the wave trap housing and the outer surface of the housing; and / or, the wave trap further includes a second sealing element disposed between the wave trap housing and the cover plate.

[0029] A distributed generation system includes a photovoltaic module and / or an energy storage module, and a combiner device as described in any of the above technical features;

[0030] The photovoltaic module and / or the energy storage module are electrically connected to the combiner device.

[0031] By adopting the above technical solution, this application has at least the following technical effects:

[0032] The current collector and distributed generation system of this application include a current collector in which the grid input line extends through the bottom edge of the housing and into the housing, and is electrically connected to an isolation device at the installation opening. This allows the grid input line to be wired to the current collector on the side of the housing, which can accommodate a certain length of the grid input line, leaving a certain length between the connection point of the grid input line and the isolation device and the ground. This facilitates the connection of the grid input line to the isolation device and reduces the installation height of the current collector, making operation easier. Simultaneously, the current collector is electrically connected to the isolation device to connect it to the grid. The photovoltaic input line of the photovoltaic module and / or the energy storage input line of the energy storage module passes through the bottom of the housing and connects to the current collector. This allows the photovoltaic input line and / or energy storage input line to be connected to the current collector without bending within the housing, simplifying the wiring of the photovoltaic input line and the energy storage input line. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the combiner device in the first embodiment of this application.

[0034] Figure 2 for Figure 1 The diagram shown is a schematic of the combiner device without the switch door.

[0035] Figure 3 for Figure 2 The side view of the junction device shown.

[0036] Figure 4This is a schematic diagram showing the wiring method between the photovoltaic incoming line and the first protective switch and the first incoming line terminal.

[0037] Figure 5 This is a schematic diagram of the combiner device in the second embodiment of this application.

[0038] Figure 6 for Figure 5 The diagram shows a partial exploded view of the combiner device.

[0039] Figure 7 This is a schematic diagram of a wave trap solution used in previous combiner equipment.

[0040] Wherein: 100, combiner device; 110, housing; 111, mounting opening; 112, mounting casing; 113, switch door; 114, first connector; 115, second connector; 116, inlet connector; 120, isolation device; 121, input terminal; 122, air switch; 123, output terminal; 124, connection terminal; 130, combiner device; 131, first wiring structure; 1311, first protective switch; 13111, first control switch; 13112, second control switch; 13113, third control switch; 1312, first inlet terminal; 13121, first adapter terminal; 13122, second adapter terminal; 131 23. Third adapter terminal; 13124. Fourth adapter terminal; 13125. Fifth adapter terminal; 13126. Sixth adapter terminal; 132. Second wiring structure; 1321. Second protection switch; 1322. Second incoming line terminal; 140. Current acquisition component; 150. Data acquisition unit; 160. Lightning protection component; 170. Wave trap; 171. Wave trap body; 1711. First connection terminal; 1712. Second connection terminal; 172. Wave trap housing; 173. Cover plate; 174. First seal; 175. Second seal; 180. Side cover; 210. First photovoltaic incoming line; 220. Second photovoltaic incoming line; 230. Third photovoltaic incoming line. Detailed Implementation

[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0047] Understandably, in current distributed generation systems, combiner units are critical electrical integration devices, and their structural design and wiring methods directly affect installation convenience and operational reliability. Conventional combiner units generally adopt a standard design with grid entry at the bottom, requiring a certain height between the grid entry line and the terminal block. That is, after the grid enters from the bottom of the casing, a certain length of grid entry line needs to be reserved at the bottom of the casing. However, this raises the position of the combiner unit, making it inconvenient for operators to operate and maintain. Furthermore, after the grid enters from the bottom of the casing, photovoltaic and energy storage lines can only enter from the side, resulting in limited operating space for wiring.

[0048] For this purpose, please refer to Figure 1 and Figure 2 This application provides a combiner device 100. Figure 1 This is a schematic diagram of the combiner device 100 in the first embodiment of this application. Figure 2 for Figure 1 The diagram shown is of the combiner device 100 without the switch door 113. This combiner device 100 is used in a distributed generation system (not shown) to connect photovoltaic modules (not shown) and / or energy storage modules (not shown) to the power grid. To better illustrate the structure of the combiner device 100, the structure of the distributed generation system is briefly described here first. In one embodiment, the distributed generation system includes photovoltaic modules and / or energy storage modules, as well as the combiner device 100 of this application.

[0049] In this embodiment, the distributed generation system includes a photovoltaic module, an energy storage module, and a combiner device 100. Of course, in other embodiments of this application, the distributed generation system may only include a photovoltaic module and a combiner device 100, or only an energy storage module and a combiner device 100. The photovoltaic module and the energy storage module are electrically connected to the combiner device 100, which is also electrically connected to the power grid to connect the photovoltaic module and the energy storage module to the grid. When the photovoltaic module is working, it converts sunlight into electrical energy. The electrical energy generated by the photovoltaic module can be stored in the energy storage module through the combiner device 100, and simultaneously, the electrical energy generated by the photovoltaic module can also be transmitted to the power grid through the combiner device 100.

[0050] See Figure 2 and Figure 3In this application, the combiner device 100 has a power grid input line that extends through the bottom edge of the housing 110 and into the housing 110, where it is electrically connected to the isolation device 120 at the mounting opening 111. This allows the power grid input line to be connected to the combiner device 100 via the side of the housing 110. The housing 110 can accommodate a certain length of the power grid input line, leaving a certain length between the connection point of the power grid input line and the isolation device 120 and the ground, facilitating the connection and reducing the installation height of the combiner device 100 for easier operation. Simultaneously, the combiner device 130 is electrically connected to the isolation device 120 to connect the combiner device 130 to the power grid. The photovoltaic input line of the photovoltaic module and / or the energy storage input line of the energy storage module passes through the bottom of the housing 110 and connects to the combiner device 130. This allows the photovoltaic input line and / or the energy storage input line to connect to the combiner device 130 within the housing 110 without bending, simplifying the wiring of the photovoltaic input line and the energy storage input line. The following describes the specific structure of the combiner device 100 in some embodiments.

[0051] See Figures 1 to 3 In one embodiment, the combiner device 100 includes a housing 110, an isolation device 120, and a combiner device 130. The housing 110 has a mounting opening 111 on its side, which communicates with the interior cavity of the housing 110. The isolation device 120 is disposed within the housing 110, and a power grid input line passes through the bottom edge of the housing 110 and extends into the housing 110 to be electrically connected to the isolation device 120 at the mounting opening 111. The combiner device 130 is disposed within the housing 110 and electrically connected to the isolation device 120. The combiner device 130 is used to electrically connect to the photovoltaic input line of a photovoltaic module passing through the bottom of the housing 110 and / or the energy storage input line of an energy storage module. Figure 3 for Figure 2 Side view of the junction device 100 shown.

[0052] Housing 110 is the outer shell of the combiner device 100, and all components of the combiner device 100 are housed within housing 110, such as... Figure 1 and Figure 2 As shown, the various components of the combiner device 100 are integrated and housed within the housing 110, reducing the number of components and providing protection for them to ensure the performance of the combiner device 100. It is worth noting that the structural form of the housing 110 is not limited in principle, as long as it serves its installation and protection functions. In this embodiment, the housing 110 is a hexahedral cabinet structure. Of course, in other embodiments of this application, the housing 110 may also be a box or other regular or irregular structures.

[0053] like Figure 2As shown, the combiner device 130 is a component in the combiner device 100 that connects to the photovoltaic module and / or energy storage module. The combiner device 130 is housed in the housing 110 and electrically connected to both the photovoltaic module and the energy storage module. It is understood that the photovoltaic module includes at least a photovoltaic input line, which is the output of the photovoltaic inverter; the energy storage module includes at least an energy storage input line, with one end electrically connected to the photovoltaic module and the other end passing through the bottom of the housing 110 and electrically connected to the combiner device 130; one end of the energy storage input line is electrically connected to the energy storage module, and the other end passes through the bottom of the housing 110 and connects to the combiner device 130. The electrical energy generated by the photovoltaic module can be stored in the energy storage module through the combiner device 130. It is worth noting that the photovoltaic module, in addition to the photovoltaic input line, includes other structures, and the energy storage module, in addition to the energy storage input line, also includes other structures, which will not be elaborated here.

[0054] The isolation device 120 is a component for connecting the combiner device 130 to the power grid. The isolation device 120 is disposed within the housing 110 and located on the side of the combiner device 130. The combiner device 130 can be electrically connected to the isolation device 120, and the isolation device 120 can also be electrically connected to the power grid input line to connect the combiner device 130 to the power grid. In this way, the electrical energy generated when the photovoltaic module is operating can be collected in the combiner device 130 and then transmitted to the isolation device 120. The combiner device 100 can be connected to the power grid through the isolation device 120 and transmit electrical energy to the power grid, realizing the transmission of photovoltaic power generation to the power grid. Furthermore, the isolation device 120 can disconnect the combiner device 100 from the power grid, facilitating user operations such as wiring the combiner device 100.

[0055] like Figure 2 and Figure 3 As shown, the side of the housing 110 has a mounting opening 111, which is through-hole to connect the outer side of the housing 110 with the inner cavity of the housing 110. After the isolation device 120 is installed on the housing 110, the isolation device 120 can be exposed through the mounting opening 111. The power grid input line enters at the bottom edge of the housing 110 and is positioned corresponding to the isolation device 120 and the mounting opening 111. Further, the power grid input line enters at the lower right corner of the housing 110 so that the power grid input line can be introduced into the mounting opening 111 on the side of the housing 110. In this way, after the power grid input line passes through the bottom edge of the housing 110, the power grid can extend into the inner cavity of the housing 110, and the power grid input line continues upward and corresponds to the isolation device 120 at the mounting opening 111. In this way, the operator can connect the power grid input line and the isolation device 120 at the mounting opening 111 to connect the isolation device 120 to the power grid.

[0056] In the combiner device 100 of this application, the grid input line extends through the bottom edge of the housing 110 and into the housing 110, connecting to the isolation device 120 at the installation opening 111. In this way, the grid input line occupies only a small space at the bottom of the housing 110, leaving the remaining space at the bottom of the housing 110 for the arrangement of photovoltaic (PV) and energy storage (ESD) input lines. That is, the PV and ESD input lines extend through the bottom of the housing 110 and into the housing 110, allowing them to be directly connected to the combiner device 130. Thus, when the PV and ESD input lines are connected to the combiner device 130 within the housing 110, they can be connected to the combiner device 130 without bending, reducing the space occupied by the PV and ESD input lines within the housing 110, facilitating wiring and binding, providing ample operating space, simplifying the wiring process for the PV and ESD input lines, and making wiring convenient.

[0057] Meanwhile, the power grid inlet and the isolation device 120 are connected through the mounting opening 111, allowing the power grid and the isolation device 120 to be connected on the side of the housing 110, thus raising the connection position. Understandably, after the power grid inlet extends into the housing 110 through the bottom edge, it must run upwards a certain distance before connecting to the isolation device 120. This allows the housing 110 to accommodate a certain length of the power grid inlet, resulting in a certain height between the connection point of the power grid inlet and the isolation device 120 and the ground. Thus, because the housing 110 can accommodate one end of the power grid inlet, the installation height requirement for the combiner device 100 is reduced, facilitating the installation and maintenance of the combiner device 100 by operators.

[0058] In the above embodiment, the combiner device 100 has its grid input line connected to the combiner device 100 on the side of the housing 110. The housing 110 can accommodate a certain length of the grid input line, allowing a certain length to be reserved between the connection point of the grid input line and the isolation device 120 and the ground. This facilitates the connection between the grid input line and the isolation device 120 and reduces the installation height of the combiner device 100, making operation easier. Simultaneously, the combiner device 130 is electrically connected to the isolation device 120 to connect the combiner device 130 to the grid. The photovoltaic input line of the photovoltaic module and / or the energy storage input line of the energy storage module pass through the bottom of the housing 110 and connect to the combiner device 130. This allows the photovoltaic input line and / or the energy storage input line to connect to the combiner device 130 without bending within the housing 110, simplifying the wiring of the photovoltaic input line and the energy storage input line.

[0059] See Figures 1 to 3In one embodiment, the housing 110 includes a mounting shell 112 and a switch door 113. An isolation device 120 and a combiner device 130 are disposed within the mounting shell 112. A mounting opening 111 is located on the side of the mounting shell 112. The switch door 113 is slewably mounted on the mounting shell 112 to open or close it. When the switch door 113 is open, it facilitates the installation of the combiner device 130, the isolation device 120, and other components. It also facilitates the connection of the photovoltaic input line to the energy storage input line and the combiner device 130. When the switch door 113 is closed, the housing 110 has a closed structure to protect the combiner device 130 and the isolation device 120, ensuring electrical safety. Optionally, the switch door 113 is rotatably disposed on one side of the mounting shell 112. Of course, in other embodiments of this application, the switch door 113 may also be slidably disposed on one side of the mounting shell 112. Optionally, the door 113 is locked to the mounting housing 112 by a latch structure to prevent the door 113 from being accidentally opened and to ensure the protective effect.

[0060] See Figure 2 In one embodiment, the combiner device 130 includes a first wiring structure 131. A first connector 114 is disposed at the bottom of the housing 110. The first wiring structure 131 is disposed within the housing 110, and the photovoltaic input line passes through the first connector 114 and is electrically connected to the first wiring structure 131. The first wiring structure 131 is the component that electrically connects the combiner device 130 to the photovoltaic module. The first connector 114 is disposed at the bottom of the housing 110 and connects the inner cavity of the housing 110 to the outer side of the housing 110. The photovoltaic input line passes through the first connector 114 and extends into the housing 110 to connect to the first wiring structure 131. Furthermore, the first wiring structure 131 is also connected to an isolation device 120. In this way, the electrical energy of the photovoltaic module is transmitted to the isolation device 120 through the first wiring structure 131 to connect the photovoltaic module to the power grid.

[0061] See Figure 2In one embodiment, the first wiring structure 131 includes a first protective switch 1311 and a first input terminal 1312. The first input terminal 1312 is disposed on the side of the first protective switch 1311 facing the first connector 114. The photovoltaic input line is electrically connected to the first input terminal 1312 and the first protective switch 1311. The first protective switch 1311 is electrically connected to the isolation device 120. The first input terminal 1312 is disposed near the bottom of the housing 110, and the first protective switch 1311 is located above it. The first protective switch 1311 can provide electrical protection for the photovoltaic input line. When a fault occurs in the photovoltaic input line, the first protective switch 1311 can disconnect to provide protection. The first input terminal 1312 can connect the photovoltaic module to the combiner device 100, so that the electrical energy of the photovoltaic module is transmitted to the combiner device 100 through the first input terminal 1312 and the first protective switch 1311.

[0062] After the photovoltaic input line passes through the first connector 114 and extends into the housing 110, it can be electrically connected to the first input terminal 1312 and the first protective switch 1311. The first protective switch 1311 is electrically connected to the isolation device 120. The electrical energy of the photovoltaic module can be transmitted to the power grid through the first protective switch 1311 and the isolation device 120. It is worth noting that the multiple photovoltaic input lines are independent of each other, so that the electrical structure and physical connection of each photovoltaic input line are completely isolated and separate, without interference, thus playing a role in fault isolation and system protection. It is also worth noting that the type of the first protective switch 1311 is not limited in principle, as long as it can play a protective role.

[0063] Understandably, the number of first protective switches 1311 is related to the number of first incoming terminals 1312 and the wiring method between the first protective switches 1311 and the first incoming terminals 1312. For example... Figure 4 As shown, Figure 4This is a schematic diagram of the wiring method between the photovoltaic incoming line and the first protection switch 1311 and the first incoming terminal 1312. In one embodiment, the grid incoming line adopts a three-phase three-wire wiring method; the first wiring structure 131 includes multiple sets of first protection switches 1311 and multiple sets of first terminals. Each set of first protection switches 1311 includes a first control switch 13111, a second control switch 13112 and a third control switch 13113. Each set of first incoming terminals 1312 includes a first adapter terminal 13121, a second adapter terminal 13122, a third adapter terminal 13123, a fourth adapter terminal 13124, a fifth adapter terminal 13125 and a sixth adapter terminal 13126. Each set of first incoming terminals 1312 connects to three photovoltaic incoming lines, namely the first photovoltaic incoming line 210, the second photovoltaic incoming line 220 and the third photovoltaic incoming line 230. Specifically, the first adapter terminal 13121 is electrically connected to the first control switch 13111, the second adapter terminal 13122 is electrically connected to the second control switch 13112, the third adapter terminal 13123 is electrically connected to the second control switch 13112, the fourth adapter terminal 13124 is electrically connected to the third control switch 13113, the fifth adapter terminal 13125 is electrically connected to the third control switch 13113, and the sixth adapter terminal 13126 is electrically connected to the first protection switch 1311. The L line of the first photovoltaic input line 210 is electrically connected to the first adapter terminal 13121, and the N line is connected to the second adapter terminal 13122. The L line of the second photovoltaic input line 220 is electrically connected to the third adapter terminal 13123, and the N line is connected to the fourth adapter terminal 13124. The L line of the third photovoltaic input line 230 is electrically connected to the fifth adapter terminal 13125, and the N line is connected to the sixth adapter terminal 13126.

[0064] In other words, the first adapter terminal 13121, the second adapter terminal 13122, the third adapter terminal 13123, the fourth adapter terminal 13124, the fifth adapter terminal 13125, and the sixth adapter terminal 13126, along with the first control switch 13111, the second control switch 13112, and the third control switch 13113, are connected in a delta configuration inside the housing 110. Thus, when the first wiring structure 131 is connected to the photovoltaic input line, the first photovoltaic input line 210, the second photovoltaic input line 220, and the third photovoltaic input line 230 can be directly connected to the first adapter terminal 13121, the second adapter terminal 13122, the third adapter terminal 13123, the fourth adapter terminal 13124, the fifth adapter terminal 13125, and the sixth adapter terminal 13126. The first photovoltaic input line 210, the second photovoltaic input line 220, and the third photovoltaic input line 230 are the outputs of the corresponding photovoltaic inverters. These three photovoltaic input lines do not require a delta connection to be wired to the first control switch 13111, the second control switch 13112, and the third control switch 13113. This allows the photovoltaic input lines to be directly connected to the first input terminal 1312, avoiding incorrect wiring due to complex connections and insufficient overlap. It also reduces the length of wire stripped on-site and simplifies photovoltaic input line wiring.

[0065] The above describes the structure and wiring method of a set of first protection switches 1311 and first incoming terminals 1312. The first wiring structure 131 actually includes multiple sets of first protection switches 1311 and first incoming terminals 1312, and their structures and wiring methods are the same, which will not be described again later.

[0066] See Figure 2 In one embodiment, the combiner device 130 further includes a second wiring structure 132. A second connector 115 is provided at the bottom of the housing 110, and the second wiring structure 132 is disposed within the housing 110. The energy storage input line passes through the second connector 115 and is electrically connected to the second wiring structure 132. The second wiring structure 132 is the component that electrically connects the combiner device 130 to the energy storage module. The second connector 115 is located at the bottom of the housing 110 and connects the inner cavity of the housing 110 to the outer side of the housing 110. The energy storage input line passes through the second connector 115 and extends into the housing 110 to connect with the second wiring structure 132. Furthermore, the second wiring structure 132 is also connected to the isolation device 120. In this way, the electrical energy of the energy storage module is transmitted to the isolation device 120 through the second wiring structure 132 to connect the energy storage module to the power grid. Meanwhile, the second wiring structure 132 is also electrically connected to the first wiring structure 131. The electrical energy of the photovoltaic module is transmitted to the energy storage module through the first wiring structure 131 and the second wiring structure 132 to realize the storage of electrical energy.

[0067] See Figure 2 In one embodiment, the second wiring structure 132 includes a second protection switch 1321 and a second input terminal 1322. The second input terminal 1322 is disposed on the side of the second protection switch 1321 facing the first connector 114. The energy storage input line is electrically connected to the second input terminal 1322 and the second protection switch 1321. The second input terminal 1322 is disposed near the bottom of the housing 110, and the second protection switch 1321 is located above the second input terminal 1322. The second protection switch 1321 can provide electrical protection for the energy storage input line. When a fault occurs in the energy storage input line, the second protection switch 1321 can disconnect to provide protection. The second input terminal 1322 can connect the energy storage module to the combiner device 100. In this way, the electrical energy of the energy storage module is transmitted to the combiner device 100 through the second input terminal 1322, and the electrical energy in the combiner device 100 can also be stored in the energy storage module through the second input terminal 1322 and the second protection switch 1321.

[0068] After the energy storage input line passes through the second connector 115 and extends into the housing 110, it can be electrically connected to the second input terminal 1322 and the second protection switch 1321. The first protection switch 1311, the second protection switch 1321, and the isolation device 120 are electrically connected. The electrical energy of the photovoltaic module can be stored in the energy storage module through the first protection switch 1311 and the second protection switch 1321. The electrical energy in the energy storage module can be transmitted to the power grid through the second protection switch 1321 and the isolation device 120. Optionally, there can be multiple second protection switches 1321 and multiple second input terminals 1322, which are connected accordingly. Each second input terminal 1322 corresponds to one energy storage input line. In this way, the multiple energy storage input lines are independent of each other, and the electrical structure and physical connection of each energy storage input line are completely isolated and separate, without interference, so as to play the role of fault isolation and system protection. It is worth noting that the type of the second protection switch 1321 is not limited in principle, as long as it can play a protective role.

[0069] See Figure 2In one embodiment, the first wiring structure 131 is located between the second wiring structure 132 and the first connector 114. That is, the first wiring structure 131 is positioned near the bottom of the housing 110, and the second wiring structure 132 is positioned above the first wiring structure 131. This rational planning of the positions of the first wiring structure 131 and the second wiring structure 132 minimizes the space occupied by the photovoltaic and energy storage input lines within the housing 110, facilitating heat dissipation of the combiner device 100 and reducing the overall height of the combiner device 100. Simultaneously, a predetermined gap exists between the first wiring structure 131 and the inner wall of the housing 110, through which the energy storage input line passes and is electrically connected to the second wiring structure 132. In other words, the first wiring structure 131 is suspended relative to the inner wall of the housing 110, and the first wiring structure 131 and the second wiring structure 132 are staggered in the thickness direction of the combiner device 100. In this way, the energy storage incoming line can be connected to the second wiring structure 132 through the preset distance between the first wiring structure 131 and the inner wall of the housing 110.

[0070] See Figure 2 In one embodiment, the busbar device 100 further includes a connecting busbar (not shown) and a current acquisition component 140. The connecting busbar electrically connects the busbar device 130 and the isolation device 120. The current acquisition component 140 is disposed on the connecting busbar and is used to detect the current of the connecting busbar. The connecting busbar can perform the function of current collection and can connect the first protection switch 1311 and the second protection switch 1321. The connecting busbar can also connect the isolation device 120.

[0071] The electrical energy output by the photovoltaic module can be collected to the connecting bus via the first protection switch 1311, and the electrical energy output by the energy storage module can be collected to the connecting bus via the second protection switch 1321. The connecting bus then transmits the electrical energy output by the photovoltaic module and the energy storage module to the power grid through the isolation device 120, thus achieving the purpose of transmitting photovoltaic power to the power grid. The current acquisition component 140 can acquire the current of the connecting bus to detect the operating status of the combiner device 100. Optionally, the current acquisition component 140 is a current transformer. Of course, in other embodiments of this application, the current acquisition component 140 can also be other components capable of acquiring the current of the connecting bus.

[0072] See Figure 2In one embodiment, the combiner device 100 further includes a data acquisition unit 150 and a signaling device. The data acquisition unit 150 is communicatively connected to the photovoltaic module and the energy storage module. The signaling device includes a signal adapter terminal and a communication terminal. The communication terminal is communicatively connected to an external communication module to construct a wireless transmission network. The signal adapter terminal is communicatively connected to the data acquisition unit 150 and can receive external control signals and transmit the control signals to the data acquisition unit 150. Optionally, the communication terminal and the communication module are Wi-Fi dongles (such as Wi-Fi receivers).

[0073] The data acquisition unit 150 is housed within the casing 110. It collects, transmits, stores, and analyzes operational data from all critical devices in the system to achieve system monitoring, management, optimization, and protection. The data acquisition unit 150 can collect relevant data from the photovoltaic modules and energy storage modules to monitor and manage their operation. A signaling device is also housed within the casing 110. A signal adapter terminal is electrically connected to the data processor. External control signals can be transmitted to the signal adapter terminal via a wireless transmission network established by the communication terminal and an external communication module. The signal adapter terminal then transmits the external control signals to the data processor, which monitors and manages the photovoltaic modules and energy storage modules based on these external control signals, thus responding to external control signals.

[0074] See Figure 2 In one embodiment, the combiner device 100 further includes a surge protection component 160 disposed within the housing 110. Optionally, the surge protection component 160 is a surge protection SPD (electrophoretic protection device). The surge protection component 160 is capable of instantaneously discharging lightning current and overvoltage to clamp them to a safe level, thereby protecting the combiner device 100.

[0075] See Figure 2 In one embodiment, the housing 110 also includes a mounting interface (not shown) for connecting to a switch (not shown) and a fusion splice tray (not shown) installed in the housing 110. The bottom of the housing 110 also has a fiber optic inlet / outlet connector (not shown), through which an optical fiber extends into the housing 110 and is electrically connected to the switch and fusion splice tray. Thus, the combiner device 100 can install the switch and fusion splice tray via the mounting interface, integrating them into the combiner device 100. The optical fiber, passing through the fiber optic inlet / outlet connector, extends into the housing 110 and connects to the switch, supporting product cascading of the switch and fusion splice tray in networking scenarios. In this way, the combiner device 100 collects data and transmits it through the fusion splice tray and the switch.

[0076] See Figure 2In one embodiment, the housing 110 also includes a signal surge protection interface (not shown). The signal surge protection interface protects the electrical components in the combiner device 100 from surge overvoltage damage introduced by the signal lines.

[0077] See Figure 1 and Figure 3 In one embodiment, the combiner device 100 further includes a side cover 180, which covers the mounting opening 111. After the power grid inlet and isolation device 120 completes the wiring at the mounting opening 111, the side cover 180 can cover the mounting opening 111 to close the mounting opening 111, making the housing 110 a closed structure, ensuring the dustproof and waterproof effect of the housing 110, thereby ensuring the performance of the combiner device 100.

[0078] See Figure 2 and Figure 3 In one embodiment, the first wiring structure 131 and the second wiring structure 132 are arranged vertically on the left side of the housing 110. The isolation device 120 is located on the right side of the housing 110, and the isolation device 120 is connected to the power grid inlet through the mounting opening 111 on the right side of the housing 110. The data acquisition unit 150 is located in the upper left corner of the housing 110, and the lightning protection component 160 is located in the upper right corner of the housing 110. Other electrical components of the combiner device 100 are located in corresponding positions on the housing 110. This rational arrangement of the components of the combiner device 130 facilitates wiring connections between components, reduces space occupation, and consequently reduces the overall size and weight of the combiner device 100, thus promoting miniaturization of the combiner device 100.

[0079] See Figures 1 to 3 In one embodiment, a wire inlet connector 116 is also provided at the bottom edge of the housing 110. The wire inlet connector 116 communicates with the inner cavity of the housing 110. The wire inlet connector 116 and the mounting opening 111 are located on the same side of the housing 110. The power grid wire can pass through the wire inlet connector 116 and extend into the housing 110 to be electrically connected to the isolation device 120 at the mounting opening 111. A wire inlet connector 116 is provided at the lower right corner of the housing 110. The wire inlet connector 116 communicates with the inner cavity and the outer side of the housing 110. The power grid wire passes through the wire inlet connector 116 and extends into the housing 110, and is electrically connected to the isolation device 120. The wire inlet connector 116 facilitates the introduction of the power grid wire into the housing 110. Meanwhile, after the inlet connector 116 is set at the lower right corner of the housing 110, the inlet connector 116 can guide the grid inlet to the mounting opening 111 on the side of the housing 110, which facilitates the grid inlet and the isolation device 120 to be wired on the side. Furthermore, the position of the inlet connector 116 will not occupy the positions of the first connector 114 and the second connector 115, so that the photovoltaic inlet and the energy storage inlet can extend into the housing 110 from the bottom of the housing 110.

[0080] See Figure 2 and Figure 3 In one embodiment, the isolation device 120 includes a plurality of input terminals 121, a plurality of circuit breakers 122, and a plurality of output terminals 123. The plurality of input terminals 121 are electrically connected to a busbar device 130. Each circuit breaker 122 is electrically connected to a corresponding input terminal 121 and output terminal 123. Each output terminal 123 is used to connect to a power grid input line. The input terminals 121 are the input components of the isolation device 120, and the output terminals 123 are the output components of the isolation device 120. The plurality of input terminals 121 are respectively connected to the busbar device 130 via connecting busbars. The plurality of input terminals 121 are respectively connected to the plurality of circuit breakers 122. Each circuit breaker 122 is connected to one output terminal 123, and each output terminal 123 is connected to a power grid input line.

[0081] Thus, through the cooperation of multiple input terminals 121, multiple circuit breakers 122, and multiple output terminals 123, the combiner device 130 is connected to the power grid. In this way, the electrical energy from the photovoltaic module can be directly transmitted to the power grid through the isolation device 120. Furthermore, the input terminals 121 and circuit breakers 122 are directly wired within the housing 110, and the output terminal 123 leads out to the output terminal of the isolation device 120. The power grid input line can be directly connected to the output terminal 123 to complete the connection between the power grid and the isolation device 120. This eliminates the need for complex wiring methods between the power grid input line and the isolation device 120, and also eliminates the need for wiring between the input terminals 121 and circuit breakers 122 during the installation of the combiner device 100. This reduces the complexity of wiring during installation, minimizes the length of wire stripped from the power grid input line on-site, and avoids incorrect wiring or insufficient connection of the power grid input line, ensuring a reliable and convenient connection between the power grid input line and the output terminals 123.

[0082] See Figure 3 In one embodiment, one end of the power grid input line is connected to the output terminal 123 via a connecting terminal 124. The connecting terminal 124 is a wire lug. During installation, the connecting terminal 124 is installed onto one end of the power grid input line, and the power grid input line is press-fitted into the connecting terminal 124. Subsequently, the connecting terminal 124 is connected to the output terminal 123 using screws or the like. This prevents the connection between the power grid input line and the output terminal 123 from becoming loose, facilitates the electrical connection between the power grid input line and the output terminal 123, and ensures the reliability of the connection between the two.

[0083] See Figure 5 and Figure 6In one embodiment, the combiner device 100 further includes a wave trap 170, which is disposed on the outside of the housing 110 and located at the mounting opening 111. The wave trap 170 is electrically connected to the power grid inlet and the isolation device 120. Figure 5 This is a schematic diagram of the combiner device 100 in the second embodiment of this application. Figure 6 for Figure 5 The diagram shows a partial exploded view of the combiner device 100. It is worth noting that the structure of the combiner device 100 in the first embodiment is substantially the same as that in the second embodiment, except that the combiner device 100 in the second embodiment has an added wave trap 170.

[0084] A mounting opening 111 is provided on the side of the housing 110. A wave trap 170 is located on the outside of the housing 110 and installed at the mounting opening 111. The wave trap 170 can replace the side cover 180 at the mounting opening 111, covering it and creating a closed structure for dust and water protection. Simultaneously, the wave trap 170 can also connect to the output terminal 123 and the mains power line. The wave trap 170 allows strong power frequency current to pass smoothly while blocking specific high-frequency communication signals, limiting their transmission to a designated line segment, thus providing high-frequency protection and facilitating PLC network communication.

[0085] Understandable, such as Figure 7 As shown, Figure 7 This is a schematic diagram of a previous scheme using a wave trap 170 in the combiner unit 100. Previously, the grid input line entered from the bottom of the housing 110, while the photovoltaic and energy storage input lines entered from the side of the housing 110. When the PLC networking communication requires the use of the wave trap 170, the wave trap 170 is located on one side of the combiner unit 100. High-current cables need to be connected to the input terminal of the wave trap 170 at a large angle, and the high-current cables also need to be bent at a large angle to connect to the combiner unit 100. However, the large diameter of the high-current cables makes bending difficult, making it impossible to install the wave trap 170 on the combiner unit 100. (See reference...) Figure 5 and Figure 6 This application designates the grid input line to enter from the bottom edge of the housing 110, and the photovoltaic input line and energy storage input line to enter from the bottom of the housing 110, providing space for the installation of high-current cables and supporting the installation of wave traps 170 on the housing 110. When the PLC networking communication requires the use of wave traps 170, the wave traps 170 can be directly hung in the mounting opening 111 of the housing 110, so that the wave traps 170 can be connected to the grid input line and output terminals 123 on the side of the housing 110.

[0086] See Figure 5 and Figure 6In one embodiment, the wave trap 170 includes a wave trap body 171, a wave trap housing 172, and a cover plate 173. The wave trap housing 172 is mounted on the outside of the housing 110, and the wave trap body 171 is mounted inside the wave trap housing 172. The wave trap body 171 includes a first connection terminal 1711 and a second connection terminal 1712. The first connection terminal 1711 is electrically connected to the isolation device 120 at the mounting opening 111, and the second connection terminal 1712 is electrically connected to the power grid inlet at the mounting opening 111. The wave trap housing 172 provides installation protection, and the wave trap body 171 is the main component of the wave trap 170, which allows strong current to pass through while blocking specific high-frequency signals. The wave trap body 171 is disposed in the wave trap housing 172, and the wave trap housing 172 protects the wave trap body 171. At the same time, the wave trap housing 172 can also be installed on the outer wall of the housing 110 and cover the installation opening 111.

[0087] The wave trap body 171 has a first connection terminal 1711 and a second connection terminal 1712 on the side facing the inner cavity of the housing 110. After the wave trap 170 is installed into the housing 110, the wave trap body 171 can be connected to the output terminal 123 through the first connection terminal 1711 and to the power grid input line through the second connection terminal 1712. In this way, the wave trap body 171 can connect the isolation device 120 and the power grid input line to provide wave blocking at the input end of the power grid input line. The cover plate 173 can be installed on the side of the wave trap housing 172 away from the housing 110. The cover plate 173 and the wave trap housing 172 can form a closed structure to provide waterproof and dustproof functions.

[0088] See Figure 6 In one embodiment, the wave trap 170 further includes a first sealing element 174, which is disposed between the outer surfaces of the wave trap housing 172 and the housing 110. The first sealing element 174 provides a seal between the wave trap housing 172 and the housing 110, preventing moisture, dust, etc., from entering the housing 110 and the wave trap 170 through the gap between them, thus improving protection performance and ensuring the reliability of the combiner device 100. Optionally, the first sealing element 174 is a sealing ring. Optionally, the first sealing element 174 is made of silicone or rubber material.

[0089] See Figure 6In one embodiment, the wave trap 170 further includes a second sealing element 175, which is disposed between the wave trap housing 172 and the cover plate 173. The second sealing element 175 provides a seal between the wave trap housing 172 and the cover plate 173, preventing moisture, dust, etc., from entering the wave trap 170 and the housing 110 through the gap between the wave trap housing 172 and the cover plate 173, thereby improving protection performance and ensuring the reliability of the combiner device 100. Optionally, the second sealing element 175 is a sealing ring. Optionally, the second sealing element 175 is made of silicone or rubber material.

[0090] In this application, the combiner device 100 has a power grid input line that extends through the bottom edge of a housing 110 and into the housing 110, where it is electrically connected to an isolation device 120 at an installation opening 111. This allows the power grid input line to be connected to the combiner device 100 via the side of the housing 110. The housing 110 can accommodate a certain length of the power grid input line, allowing for a certain length of the line between the connection point with the isolation device 120 and the ground. This facilitates connection between the power grid input line and the isolation device 120 and reduces the installation height of the combiner device 100, making operation easier. Simultaneously, the combiner device 130 is electrically connected to the isolation device 120 to connect to the power grid. The photovoltaic input line of the photovoltaic module and / or the energy storage input line of the energy storage module passes through the bottom of the housing 110 and connects to the combiner device 130. This allows the photovoltaic input line and / or the energy storage input line to connect to the combiner device 130 within the housing 110 without bending, simplifying the wiring of the photovoltaic input line and the energy storage input line.

[0091] This application also provides a distributed generation system, including a photovoltaic module and / or an energy storage module, and a combiner device 100 as described in any of the above embodiments. The photovoltaic module, the energy storage module, and the combiner device 100 are electrically connected, and the combiner device 100 can be connected to the grid input line. By using the combiner device 100 of the above embodiments, the distributed generation system of this application can connect the photovoltaic module and the energy storage module to the grid. Simultaneously, it raises the installation position of the combiner device 100 and the grid input line, reducing the installation height requirement of the combiner device 100 and facilitating its installation.

[0092] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0093] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A combiner device, characterized in that, include: A housing having a mounting opening on its side, the mounting opening communicating with the inner cavity of the housing; An isolation device is disposed in the housing, and an incoming power line passes through the bottom edge of the housing and extends into the housing to be electrically connected to the isolation device at the mounting opening; A combiner device is disposed in the housing and electrically connected to the isolation device. The combiner device is used to electrically connect to the photovoltaic input line of the photovoltaic module passing through the bottom of the housing and / or the energy storage input line of the energy storage module.

2. The combiner device according to claim 1, characterized in that, The combiner device includes a first wiring structure, a first connector is provided at the bottom of the housing, the first wiring structure is disposed in the housing, and the photovoltaic input line passes through the first connector and is electrically connected to the first wiring structure; And / or, the combiner device further includes a second wiring structure, a second connector is provided at the bottom of the housing, the second wiring structure is disposed in the housing, and the energy storage inlet line passes through the second connector and is electrically connected to the second wiring structure.

3. The combiner device according to claim 2, characterized in that, The first wiring structure includes a first protection switch and a first incoming terminal. The first incoming terminal is located on the side of the first protection switch facing the first connector. The photovoltaic incoming line is electrically connected to the first incoming terminal and the first protection switch.

4. The combiner device according to claim 3, characterized in that, The incoming power line adopts a three-phase three-wire connection method; The first wiring structure includes multiple sets of first protection switches and multiple sets of first terminals. Each set of first protection switches includes a first control switch, a second control switch, and a third control switch. Each set of first input terminals includes a first adapter terminal, a second adapter terminal, a third adapter terminal, a fourth adapter terminal, a fifth adapter terminal, and a sixth adapter terminal. Each set of first input terminals connects to three photovoltaic input lines, namely the first photovoltaic input line, the second photovoltaic input line, and the third photovoltaic input line. Specifically, the first adapter terminal is electrically connected to the first control switch, the second adapter terminal is electrically connected to the second control switch, the third adapter terminal is electrically connected to the second control switch, the fourth adapter terminal is electrically connected to the third control switch, the fifth adapter terminal is electrically connected to the third control switch, the sixth adapter terminal is electrically connected to the first protection switch, the L-line of the first photovoltaic input line is electrically connected to the first adapter terminal and the N-line is connected to the second adapter terminal, the L-line of the second photovoltaic input line is electrically connected to the third adapter terminal and the N-line is connected to the fourth adapter terminal, and the L-line of the third photovoltaic input line is electrically connected to the fifth adapter terminal and the N-line is connected to the sixth adapter terminal.

5. The combiner device according to claim 2, characterized in that, The second wiring structure includes a second protection switch and a second incoming terminal. The second incoming terminal is disposed on the side of the second protection switch facing the first connector. The energy storage incoming line is electrically connected to the second incoming terminal and the second protection switch. And / or, the first wiring structure is located between the second wiring structure and the first connector; And / or, there is a preset distance between the first wiring structure and the inner wall of the housing, and the energy storage inlet line passes through the preset distance and is electrically connected to the second wiring structure.

6. The combiner device according to claim 1, characterized in that, The busbar also includes a connecting bus and a current acquisition component. The connecting bus is electrically connected to the busbar and the isolation device. The current acquisition component is disposed on the connecting bus and is used to detect the current of the connecting bus. And / or, the combiner device further includes a data acquisition unit and a signaling device. The data acquisition unit is communicatively connected to the photovoltaic module and the energy storage module. The signaling device includes a signal conversion terminal and a communication terminal. The communication terminal is communicatively connected to an external communication module to construct a wireless transmission network. The signal conversion terminal is communicatively connected to the data acquisition unit. The signal conversion terminal can receive external control signals and transmit the control signals to the data acquisition unit. And / or, the combiner device further includes a lightning protection component, which is disposed within the housing; And / or, the housing also has a mounting interface for connecting to a switch and a fusion splice tray installed in the housing, and the bottom of the housing also has an optical fiber inlet / outlet connector, through which an optical fiber extends into the housing and is electrically connected to the switch and the fusion splice tray; And / or, the housing also has a signal surge protection interface; And / or, the combiner device further includes a side cover that covers the mounting opening; And / or, the housing includes a mounting shell and a switch door, the isolation device and the busbar device are disposed in the mounting shell, the mounting opening is disposed on the side of the mounting shell, and the switch door is slewably mounted on the mounting shell to open or close the mounting shell.

7. The combiner device according to any one of claims 1 to 6, characterized in that, The bottom edge of the housing is also provided with an inlet connector, which communicates with the inner cavity of the housing. The inlet connector and the mounting opening are located on the same side of the housing. The power grid inlet can pass through the inlet connector and extend into the housing to be electrically connected to the isolation device at the mounting opening.

8. The combiner device according to any one of claims 1 to 6, characterized in that, The isolation device includes multiple input terminals, multiple air switches, and multiple output terminals. The multiple input terminals are electrically connected to the busbar device. Each air switch is electrically connected to the corresponding input terminal and the corresponding output terminal. Each output terminal is used to connect to a power grid input line.

9. The combiner device according to any one of claims 1 to 6, characterized in that, The combiner device also includes a wave trap, which is disposed on the outside of the housing and located at the mounting opening. The wave trap is electrically connected to the power grid inlet and the isolation device.

10. The combiner device according to claim 9, characterized in that, The wave trap includes a wave trap body, a wave trap housing, and a cover plate. The wave trap housing is installed on the outside of the housing, and the wave trap body is installed inside the wave trap housing. The wave trap body includes a first connection terminal and a second connection terminal. The first connection terminal is electrically connected to the isolation device at the installation opening, and the second connection terminal is electrically connected to the power grid inlet at the installation opening. The wave trap further includes a first sealing element disposed between the wave trap housing and the outer surface of the housing; and / or, the wave trap further includes a second sealing element disposed between the wave trap housing and the cover plate.

11. A distributed generation system, characterized in that, Includes photovoltaic modules and / or energy storage modules, and a combiner device as described in any one of claims 1 to 10; The photovoltaic module and / or the energy storage module are electrically connected to the combiner device.

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