A capacitor-based photovoltaic grid-tied inverter

Abstract

The utility model belongs to inverter technical field discloses a kind of photovoltaic grid-connected inverters based on capacitor, including inverter host computer, support, capacitor and fixed clamp module, inverter host computer is installed in support, inverter host computer includes shell and the main control module configured in shell interior, main control module connects capacitor, capacitor acts as energy buffer, absorbs or releases direct current stably, to respond quickly when load fluctuation, illumination change or transient voltage change, ensure the stable electric energy output of inverter host computer, avoid the fluctuation of power grid, fixed clamp module is installed in support, fixed clamp module includes multiple different cable clamps, the sidewall of shell is installed and connected to the port module of main control module, different direction cable is connected to port module after being fixed to corresponding cable clamp, wiring is neat, still can prevent cable from being pulled or interfered in use process, reduce the failure risk caused by cable slackening or disconnecting, reduce the difficulty of later maintenance.

Description

Technical Field

[0001] This utility model relates to the field of inverter technology, and in particular to a capacitor-based photovoltaic grid-connected inverter. Background Technology

[0002] With the continuous growth of global energy demand and increasingly stringent environmental protection requirements, photovoltaic power generation, as a clean and renewable energy source, has become an important part of the global power supply system. Photovoltaic power generation systems, by converting solar energy into electricity, can effectively reduce greenhouse gas emissions and decrease dependence on fossil fuels.

[0003] However, the power output of photovoltaic power generation systems is somewhat unstable, mainly affected by factors such as weather changes, solar radiation intensity, and temperature. This volatility can cause grid voltage fluctuations and power quality problems when photovoltaic power plants are connected to the grid, and may even lead to frequent system adjustments to adapt to instantaneous load changes, thus affecting the system's efficiency and stability. Although some inverters use battery energy storage systems, the response speed of batteries is relatively slow, and they are prone to over-discharge or over-charge under extreme load conditions. In addition, the installation structure of most photovoltaic grid-connected inverters is relatively complex, which can easily lead to problems such as messy wiring and loose lines, increasing the difficulty of later maintenance. Utility Model Content

[0004] The purpose of this invention is to provide a capacitor-based photovoltaic grid-connected inverter that has a rapid response, ensures stable power output of the inverter system, and features neat and robust wiring.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A capacitor-based photovoltaic grid-connected inverter includes an inverter main unit, a bracket, a capacitor, and a fixing clamp module. The inverter main unit is mounted on the bracket and includes a housing and a main control module disposed inside the housing. The main control module is connected to the capacitor. The fixing clamp module is mounted on the bracket and includes multiple cable clamps with different clamping directions. A port module of the main control module is mounted and connected to the side wall of the housing. Cables with different directions are fixed to the corresponding cable clamps and then connected to the port module.

[0007] Preferably, the fixing clamp module includes a main clamp body, a frame plate, cable clamp A, cable clamp B, and cable clamp C. The main clamp body is mounted on the bracket, the frame plate is mounted on the side of the main clamp body away from the bracket, cable clamp A, cable clamp B, and cable clamp C are mounted on the frame plate, and the clamping direction of cable clamp A is parallel to the X direction, the clamping direction of cable clamp B is parallel to the Y direction, and the clamping direction of cable clamp C is parallel to the Z direction.

[0008] Preferably, the bracket includes a frame and two support rods, the frame is vertically arranged, and the two support rods are respectively installed at the bottom of the frame along the width direction of the frame.

[0009] Preferably, the capacitor-based photovoltaic grid-connected inverter further includes a connecting rod, the fixing clamp module is clamped on the connecting rod, the connecting rod has an L-shaped structure, one end of the connecting rod is connected to one side of the frame in the width direction, and the other end is connected to the support rod on the same side.

[0010] Preferably, the front of the frame is equipped with a back plate, the inverter main unit is mounted on the back plate, the back plate is provided with through holes, and the DC cable connected to the capacitor passes through the through holes to connect to the main control module.

[0011] Preferably, the perforation is provided along the width direction of the bracket, and the wall of the perforation is slidably fitted with a cable clamp D along the width direction of the bracket. The cable clamp D is an O-shaped clamp, and the DC cable is fixed to the cable clamp D.

[0012] Preferably, the port module includes at least a DC interface, an AC interface, a communication interface, an AC / DC circuit breaker interface, and a DC power control port, with the DC cable connected to the DC interface.

[0013] Preferably, at least two fixing clamp modules are installed at intervals along the vertical direction on each of the connecting rods.

[0014] Preferably, the bracket further includes two wheels, which are respectively installed on both sides of the frame in the width direction.

[0015] Preferably, the bracket further includes a handrail, one end of which is mounted on the back of the frame, and the other end extends away from the frame, with the handrail located above the frame.

[0016] The beneficial effects of this utility model are:

[0017] This utility model provides a capacitor-based photovoltaic grid-connected inverter, including an inverter main unit, a bracket, capacitors, and a fixing clamp module. The inverter main unit is mounted on the bracket and includes a housing and a main control module configured inside the housing. The main control module is connected to the capacitor, which acts as an energy buffer, smoothly absorbing or releasing DC power, thereby responding quickly to load fluctuations, changes in light intensity, or instantaneous voltage changes, ensuring stable power output from the inverter main unit and avoiding grid fluctuations. The fixing clamp module is mounted on the bracket and includes multiple cable clamps with different clamping directions. Port modules connected to the main control module are installed on the side wall of the housing. Cables with different directions are fixed to the corresponding cable clamps and then connected to the port modules, resulting in neat wiring and preventing cables from being pulled or interfered with during use, reducing the risk of failure caused by loose or broken cables, and lowering the difficulty of later maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a capacitor-based photovoltaic grid-connected inverter provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the combination of the inverter host and the capacitor provided in this embodiment of the utility model;

[0020] Figure 3 This is a partial structural schematic diagram of the back plate provided in an embodiment of the present utility model;

[0021] Figure 4 This is a partial structural schematic diagram of the fixing clamp module provided in this embodiment of the utility model.

[0022] In the picture:

[0023] 1. Inverter main unit; 2. Bracket; 21. Frame; 22. Support rod; 23. Wheels; 24. Handrail; 25. Back plate; 251. Perforation; 3. Capacitor; 4. Fixing clamp module; 41. Main clamp body; 42. Frame plate; 43. Cable clamp A; 44. Cable clamp B; 45. Cable clamp C; 5. Port module; 6. Cable clamp D; 7. Mounting rod. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0028] This invention provides a capacitor-based photovoltaic grid-connected inverter that can quickly respond to output fluctuations or load changes in the photovoltaic system, ensuring stable power output of the inverter system. It also provides neat wiring and prevents cables from being pulled or interfered with during use, reducing the risk of failure caused by loose or broken cables and lowering the difficulty of later maintenance.

[0029] Please see Figures 1 to 4 A capacitor-based photovoltaic grid-connected inverter includes an inverter host 1, a bracket 2, a capacitor 3, and a fixing clamp module 4. The inverter host 1 is mounted on the bracket 2, and the capacitor 3 is connected to the inverter host 1. The capacitor 3 acts as an energy buffer, smoothly absorbing or releasing DC power, thereby ensuring the stability of the power output of the inverter host 1 when there are load fluctuations, changes in light intensity, or instantaneous voltage changes, and avoiding grid fluctuations. The fixing clamp module 4 is installed on the bracket 2. The fixing clamp module 4 orderly fixes the cables connected to the inverter host 1 in different directions, preventing the cables from being pulled or interfered with during use, and reducing the risk of failure caused by loose or broken cables.

[0030] Specifically, please refer to Figure 1 and Figure 2 The inverter main unit 1 includes a housing and a main control module configured inside the housing. The main control module is connected to the capacitor 3. The housing is fixed on the bracket 2, and the side wall of the housing is installed with a port module 5 connected to the main control module. The port module 5 provides convenient conditions for system expansion and supports compatible connection with other devices (such as energy storage systems, smart meters, etc.), improving flexibility and maintainability.

[0031] Optionally, the port module 5 includes at least a DC interface, an AC interface, a communication interface, an AC / DC circuit breaker interface, and a DC power control port.

[0032] For example, please refer to Figure 1 The support frame 2 includes a frame 21 and two support rods 22. The frame 21 is vertically arranged, and the two support rods 22 are respectively installed at the bottom of the frame 21 along the width direction of the frame 21 to ensure stable support of the frame 21. Furthermore, the support frame 2 also includes two wheels 23, which are respectively installed on both sides of the frame 21 in the width direction to facilitate the transport of the transformer main unit. Furthermore, the support frame 2 also includes a handrail 24, one end of which is installed on the back of the frame 21, and the other end extends away from the frame 21. The handrail 24 is located above the frame 21 for easy hand support.

[0033] The above settings not only facilitate the movement and installation of the inverter main unit 1, but also make it easy to maintain or replace it when needed.

[0034] Please see Figure 1 and Figure 3 The front of the frame 21 is mounted on the back plate 25, the inverter main unit 1 is mounted on the back plate 25, and the back plate 25 is provided with a through hole 251. The capacitor 3 is connected to the DC cable. The DC cable passes through the through hole 251 and is connected to the main control module. Specifically, the DC cable is connected to the main control module through the DC interface.

[0035] Preferably, please refer to Figure 1 and Figure 3 The perforation 251 is set along the width direction of the bracket 2. The cable clamp D6 is slidably mounted on the wall of the perforation 251 along the width direction of the bracket 2. That is, the cable clamp D6 is slidably installed on the wall of the perforation 251 and is limited by its structural features (such as elastic arms, buckles, etc.). The cable clamp D6 is an O-shaped clamp, and the DC cable is fixed to the cable clamp D6. Through the cooperation of the perforation 251 and the cable clamp D6, a flexible fixing space is provided inside the back plate 25 to ensure that the DC cable is not compressed or rubbed during the arrangement.

[0036] Please see Figure 1The photovoltaic grid-connected inverter based on capacitors provided in this embodiment also includes a connecting rod. The connecting rod has an L-shaped structure. One end of the connecting rod is connected to one side of the frame 21 in the width direction, and the other end is connected to the support rod 22 on the same side. The fixing module clamp is installed on the connecting rod.

[0037] Optionally, this embodiment includes two connecting rods, each equipped with a fixing module clamp. One end of one connecting rod is connected to one side of the frame 21 in the width direction, and the other end is connected to a support rod 22 located on the same side. The other connecting rod is connected to the other side of the frame 21 in the width direction, and the other end is connected to a support rod 22 located on the same side. This arrangement improves the flexibility of wiring.

[0038] Alternatively, at least two fixing clamp modules 4 can be installed at intervals along the vertical direction on the connecting rod to further improve the flexibility of wiring.

[0039] The fixing clamp module 4 is used to fix the cables of different directions connected to the inverter host 1 in an orderly manner, so as to prevent the cables from being pulled or interfered with during use and reduce the risk of failure caused by loose or broken cables.

[0040] For example, please refer to Figure 1 and Figure 4 The fixing clamp module 4 includes a main clamp body 41, a frame plate 42 and multiple cable clamps with different clamping directions. The main clamp body 41 is installed on the bracket 2, the frame plate 42 is installed on the side of the main clamp body 41 away from the bracket 2, and the cable clamps are set on the frame plate 42. Cables with different directions are fixed to the corresponding cable clamps and then connected to the corresponding interfaces of the port module 5.

[0041] Preferably, the main clamp 41 clamps the connecting rod.

[0042] Please see Figure 4 In this embodiment, the frame plate 42 is provided with cable clamps A43, B44 and C45. The clamping direction of cable clamp A43 is parallel to the X direction, the clamping direction of cable clamp B44 is parallel to the Y direction, and the clamping direction of cable clamp C45 is parallel to the Z direction. Through the above arrangement, cable clamp A43 orderly fixes the X-direction cable connected to the inverter, cable clamp B44 orderly fixes the Y-direction cable connected to the inverter, and cable clamp C45 orderly fixes the Z-direction cable connected to the inverter. This can prevent the cable from being pulled or interfered with during use and reduce the risk of failure caused by loose or broken cables.

[0043] It should be noted that cable clamps are a common device in existing technology, and their structure will not be described in detail here.

[0044] The capacitor-based photovoltaic grid-connected inverter provided in this embodiment has the following beneficial effects:

[0045] Capacitor 3 is combined with inverter host 1. Capacitor 3 acts as an energy buffer, smoothly absorbing or releasing DC power. This ensures the stability of the power output of inverter host 1 when there are load fluctuations, changes in light intensity, or instantaneous voltage changes, avoiding grid fluctuations. Capacitor 3 can quickly respond to output fluctuations or load changes in the photovoltaic system, reducing the need for inverter host 1 to frequently adjust its output power, thereby extending the service life and overall efficiency of the photovoltaic system.

[0046] The bracket 2, together with the handrail 24 and the wheels 23, not only facilitates the movement and installation of the inverter main unit 1, but also makes it convenient to maintain or replace the equipment when needed.

[0047] The fixing module 4 secures the X, Y, and Z cables connected to the inverter host 1 in an orderly manner, preventing the cables from being pulled or interfered with during use and reducing the risk of failure caused by loose or broken cables.

[0048] The combination of the perforation 251 and the cable clamp D6 provides flexible fixing space inside the backplate 25, ensuring that the DC cable is not compressed or rubbed during installation.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A capacitor-based photovoltaic grid-connected inverter, characterized in that, The system includes an inverter main unit (1), a bracket (2), a capacitor (3), and a fixing clamp module (4). The inverter main unit (1) is mounted on the bracket (2). The inverter main unit (1) includes a housing and a main control module disposed inside the housing. The main control module is connected to the capacitor (3). The fixing clamp module (4) is mounted on the bracket (2). The fixing clamp module (4) includes multiple cable clamps with different clamping directions. The side wall of the housing is installed and connected to the port module (5) of the main control module. Cables with different directions are fixed to the corresponding cable clamps and then connected to the port module (5).

2. A capacitor-based photovoltaic grid-connected inverter according to claim 1, characterized in that, The fixing clamp module (4) includes a main clamp body (41), a frame plate (42), cable clamp A (43), cable clamp B (44) and cable clamp C (45). The main clamp body (41) is installed on the bracket (2). The frame plate (42) is installed on the side of the main clamp body (41) away from the bracket (2). The cable clamp A (43), the cable clamp B (44) and the cable clamp C (45) are installed on the frame plate (42). The clamping direction of the cable clamp A (43) is parallel to the X direction, the clamping direction of the cable clamp B (44) is parallel to the Y direction, and the clamping direction of the cable clamp C (45) is parallel to the Z direction.

3. A capacitor-based photovoltaic grid-connected inverter according to claim 1, characterized in that, The bracket (2) includes a frame (21) and two support rods (22). The frame (21) is vertically arranged, and the two support rods (22) are respectively installed at the bottom of the frame (21) along the width direction of the frame (21).

4. A capacitor-based photovoltaic grid-connected inverter according to claim 3, characterized in that, The capacitor-based photovoltaic grid-connected inverter also includes a connecting rod, and the fixing clamp module (4) is clamped on the connecting rod. The connecting rod has an L-shaped structure, with one end of the connecting rod connected to one side of the frame (21) in the width direction and the other end connected to the support rod (22) on the same side.

5. A capacitor-based photovoltaic grid-connected inverter according to claim 3, characterized in that, The front mounting backplate (25) of the frame (21) is on which the inverter host (1) is mounted. The backplate (25) has a through hole (251) through which the DC cable connected to the capacitor (3) passes through the through hole (251) and connects to the main control module.

6. A capacitor-based photovoltaic grid-connected inverter according to claim 5, characterized in that, The perforation (251) is provided along the width direction of the bracket (2), and the wall of the perforation (251) is slidably fitted with a cable clamp D (6) along the width direction of the bracket (2). The cable clamp D (6) is an O-shaped clamp, and the DC cable is fixed to the cable clamp D (6).

7. A capacitor-based photovoltaic grid-connected inverter according to claim 5, characterized in that, The port module (5) includes at least a DC interface, an AC interface, a communication interface, an AC / DC circuit breaker interface, and a DC power control port, and the DC cable is connected to the DC interface.

8. A capacitor-based photovoltaic grid-connected inverter according to claim 4, characterized in that, At least two fixing clamp modules (4) are installed at intervals along the vertical direction on each of the connecting rods.

9. A capacitor-based photovoltaic grid-connected inverter according to any one of claims 3-7, characterized in that, The bracket (2) also includes two wheels (23), which are respectively installed on both sides of the frame (21) in the width direction.

10. A capacitor-based photovoltaic grid-connected inverter according to any one of claims 3-7, characterized in that, The bracket (2) also includes a handrail (24), one end of which is mounted on the back of the frame (21), and the other end extends away from the frame (21), and the handrail (24) is located above the frame (21).

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