Harmonic rejection photovoltaic inverter

Abstract

The utility model discloses a kind of harmonic suppression type photovoltaic inverter, it is related to photovoltaic inverter technical field, including inverter shell and rotating plate, the side of inverter shell is provided with opening, multiple rotating plate is sequentially abutted and arranged in the inside of opening from left to right, the inside fixed setting of lower side of opening has fixed link, the lower end of multiple rotating plate is all rotationally connected with fixed link, the side of rotating plate close to inverter shell is sequentially provided with multiple electrical components from top to bottom, connection mechanism is arranged between the electrical component and rotating plate, the electrical component is limited connection with rotating plate by connection mechanism, the top of inverter shell is provided with the first limiting mechanism of restricting rotating plate rotation. The utility model can remove the electrical component needing maintenance from device shell, without disassembling entire device shell, convenient operation, time-saving and labor-saving.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic inverter technology, specifically to a harmonic suppression type photovoltaic inverter. Background Technology

[0002] Harmonic effects in photovoltaic (PV) power generation systems are a significant power quality issue, particularly prominent in power grids where PV penetration is constantly increasing. The primary source is the PV inverter, as it converts direct current (DC) to alternating current (AC) for grid connection. This conversion process inevitably generates non-fundamental frequency currents (harmonic currents). With the rapid development of the PV industry, harmonic-suppressive PV inverters have been widely adopted in PV power generation systems.

[0003] During the use of harmonic suppression photovoltaic inverters, internal electrical components may malfunction or require regular maintenance. However, when maintaining the internal electrical components of existing harmonic suppression photovoltaic inverters, it is usually necessary to disassemble the entire device casing. This is not only cumbersome and time-consuming, but also prone to damaging other components during disassembly, increasing maintenance costs and risks. Utility Model Content

[0004] In view of the problems existing in the current harmonic suppression type photovoltaic inverter, this utility model is proposed.

[0005] Therefore, the purpose of this invention is to provide a harmonic suppression type photovoltaic inverter, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A harmonic suppression photovoltaic inverter includes an inverter housing and rotating plates. An opening is provided on one side of the inverter housing. Multiple rotating plates are sequentially arranged from left to right, abutting against each other inside the opening. A fixing rod is fixedly installed inside the lower side of the opening. The lower ends of the multiple rotating plates are rotatably sleeved with the fixing rod. Multiple electrical components are sequentially arranged from top to bottom on the side of the rotating plates closest to the inverter housing. A connecting mechanism is provided between the electrical components and the rotating plates, limiting the connection between the electrical components and the rotating plates through the connecting mechanism. A first limiting mechanism is provided on the top of the inverter housing to restrict the rotation of the rotating plates.

[0007] Preferably, the connecting mechanism includes a wedge block and a first threaded rod. A wedge groove is provided on the side wall of the rotating plate at a position corresponding to the electrical component. A wedge block is engaged inside the wedge groove. One side of the wedge block is fixedly connected to the corresponding electrical component. A threaded hole is provided at the bottom of the wedge groove. The first threaded rod is threaded into the inside of the threaded hole. One end of the first threaded rod abuts against the side of the wedge block near the opening of the wedge groove.

[0008] Preferably, the first limiting mechanism includes an L-shaped plate and a crossbar. Side plates are fixedly provided on both sides of the top of the inverter housing. The crossbar is rotatably disposed between two of the side plates. Connecting blocks are fixedly provided on the upper side of each of the L-shaped plates. The connecting blocks are fixedly sleeved on the bar wall of the crossbar. The L-shaped plates abut against the side of the corresponding rotating plate away from the inverter housing. A second limiting mechanism restricting the rotation of the crossbar is provided on the outer wall of one of the side plates.

[0009] Preferably, the second limiting mechanism includes a second threaded rod and a fixing block. The fixing block is fixedly disposed on the outer wall of one side plate. The second threaded rod is threadedly sleeved in the middle of the fixing block. One end of the crossbar has an insertion hole, and one end of the second threaded rod is inserted into the insertion hole.

[0010] Preferably, mounting plates are fixedly installed on both outer walls of the inverter housing.

[0011] Preferably, the inner wall of the inverter housing on the side away from the rotating plate has multiple wire holes.

[0012] Preferably, the lower ends of the plurality of rotating plates are all provided with rounded chamfers.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. In this utility model, by rotating the second threaded rod, the second threaded rod is disengaged from the insertion hole on the side wall of the crossbar. At this time, rotating the L-shaped plate separates the L-shaped plate from the rotating plate, which allows the rotating plate to be rotated. This causes the electrical components installed inside the rotating plate to rotate out of the inverter housing, making it convenient to maintain the electrical components without disassembling the entire inverter housing, saving time and effort.

[0014] 2. In this utility model, after opening the rotating plate, rotating the first threaded rod causes one end of the first threaded rod located in the wedge groove to retract into the threaded hole, thereby releasing the restriction on the wedge block. This allows the wedge block to be pulled out from the opening of the wedge groove, enabling time-saving and labor-saving disassembly of damaged electrical components and facilitating the replacement of damaged electrical components. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the structure of a harmonic suppression type photovoltaic inverter proposed in this utility model; Figure 2 for Figure 1 A schematic diagram of the second-view structure; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 for Figure 1 A magnified schematic diagram of part A in the middle section.

[0017] Explanation of reference numerals in the attached figures: 1. Inverter housing; 2. Mounting plate; 3. Rotating plate; 4. Side plate; 5. Connecting block; 6. L-shaped plate; 7. Crossbar; 8. Threading hole; 9. First threaded rod; 10. Wedge block; 11. Electrical component; 12. Fixing block; 13. Second threaded rod; 14. Fixing rod. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0019] This utility model discloses a harmonic suppression type photovoltaic inverter.

[0020] Reference Figure 1-4 A harmonic suppression type photovoltaic inverter includes an inverter housing 1 and a rotating plate 3. Mounting plates 2 are fixedly installed on both outer walls of the inverter housing 1 to facilitate the installation and fixation of the inverter housing 1. An opening is opened on one side of the inverter housing 1, and multiple rotating plates 3 are arranged in sequence from left to right abutting against each other inside the opening. A fixing rod 14 is fixedly installed inside the lower side of the opening, and the lower ends of the multiple rotating plates 3 are rotatably sleeved with the fixing rod 14. The lower ends of the multiple rotating plates 3 are all rounded and chamfered to allow the rotating plates 3 to rotate smoothly. Multiple wire holes 8 are opened on the inner wall of the side of the inverter housing 1 away from the rotating plates 3. Multiple electrical components 11 are arranged in sequence from top to bottom on the side of the rotating plate 3 close to the inverter housing 1. A connecting mechanism is provided between the electrical components 11 and the rotating plate 3, and the electrical components 11 are limitedly connected to the rotating plate 3 through the connecting mechanism. A first limiting mechanism is provided on the top of the inverter housing 1 to limit the rotation of the rotating plate 3.

[0021] Reference Figure 1-4 The connecting mechanism includes a wedge block 10 and a first threaded rod 9. A wedge groove is provided on the side wall of the rotating plate 3 at the position corresponding to the electrical component 11. The wedge block 10 is engaged inside the wedge groove. One side of the wedge block 10 is fixedly connected to the corresponding electrical component 11. A threaded hole is provided at the bottom of the wedge groove. The first threaded rod 9 is threaded into the inside of the threaded hole. One end of the first threaded rod 9 abuts against the side of the wedge block 10 near the opening of the wedge groove.

[0022] Reference Figure 1-4The first limiting mechanism includes an L-shaped plate 6 and a crossbar 7. Side plates 4 are fixedly installed on both sides of the top of the inverter housing 1. The crossbar 7 is rotatably installed between the two side plates 4. Connecting blocks 5 are fixedly installed on the upper side of the multiple L-shaped plates 6. The connecting blocks 5 are fixedly sleeved on the bar wall of the crossbar 7. The multiple L-shaped plates 6 abut against the side of the corresponding rotating plate 3 away from the inverter housing 1. A second limiting mechanism restricting the rotation of the crossbar 7 is provided on the outer wall of one side plate 4.

[0023] Reference Figure 1-4 The second limiting mechanism includes a second threaded rod 13 and a fixing block 12. The fixing block 12 is fixedly installed on the outer wall of one side plate 4. The second threaded rod 13 is threadedly sleeved in the middle of the fixing block 12. One end of the crossbar 7 is provided with an insertion hole, and one end of the second threaded rod 13 is inserted into the insertion hole.

[0024] In this utility model, during use, the inverter housing 1 is first fixed in a designated position by the mounting plate 2. The electrical component 11 is installed on the rotating plate 3 through the connecting mechanism. Specifically, the wedge block 10 is inserted into the wedge groove of the rotating plate 3, and then the first threaded rod 9 is tightened so that one end of it abuts against the wedge block 10. The electrical component 11 is fixed on the rotating plate 3 through the wedge fit. At this time, the first limiting mechanism restricts the rotation of the rotating plate 3 to ensure that the rotating plate 3 remains fixed when the inverter is working normally. Specifically, the second threaded rod 13 is inserted into the insertion hole of the crossbar 7 to restrict the rotation of the crossbar 7, so that the L-shaped plate 6 abuts against the rotating plate 3 to prevent the rotating plate 3 from rotating. When it is necessary to maintain an electrical component 11, first release the restriction of the first limiting mechanism: rotate the second threaded rod 13 to make it exit from the insertion hole of the crossbar 7, then rotate the crossbar 7 to drive the L-shaped plate 6 to rotate around the crossbar 7, so that the L-shaped plate 6 is separated from the rotating plate 3. At this time, the rotating plate 3 loses its limit. Then, rotate the rotating plate 3 where the electrical component 11 to be maintained is located, rotating it outward about the fixed rod 14 as the axis, until the rotating plate 3 and the electrical component 11 move out of the opening of the inverter housing 1, so that the operator can inspect and maintain the electrical component 11. If electrical component 11 needs to be replaced, after the rotating plate 3 is removed, loosen the first threaded rod 9 so that one end of it is disengaged from the wedge block 10. Then pull the wedge block 10 out of the wedge groove to remove the damaged electrical component 11. When replacing the new electrical component 11, repeat the above installation steps. After maintenance, rotate the rotating plate 3 back into the opening of the inverter housing 1 so that multiple rotating plates 3 abut against each other from left to right. Then rotate the crossbar 7 so that the L-shaped plate 6 abuts against the rotating plate 3 again. Tighten the second threaded rod 13 and insert it into the insertion hole of the crossbar 7 to complete the limit and ensure that the inverter works normally. The entire maintenance process does not require disassembling the entire inverter housing 1. It is convenient to operate, saves time and effort, improves maintenance efficiency, and reduces maintenance costs and risks.

[0025] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A harmonic suppression type photovoltaic inverter, comprising an inverter housing (1) and a rotating plate (3), characterized in that, An opening is provided on one side of the inverter housing (1). Multiple rotating plates (3) are arranged in sequence from left to right on the inside of the opening. A fixing rod (14) is fixedly provided inside the lower side of the opening. The lower ends of the multiple rotating plates (3) are rotatably sleeved with the fixing rod (14). Multiple electrical components (11) are arranged in sequence from top to bottom on the side of the rotating plate (3) near the inverter housing (1). A connecting mechanism is provided between the electrical components (11) and the rotating plate (3). The electrical components (11) are limitedly connected to the rotating plate (3) through the connecting mechanism. A first limiting mechanism is provided on the top of the inverter housing (1) to limit the rotation of the rotating plate (3).

2. The harmonic suppression photovoltaic inverter according to claim 1, characterized in that, The connecting mechanism includes a wedge block (10) and a first threaded rod (9). A wedge groove is provided on the side wall of the rotating plate (3) at the position corresponding to the electrical component (11). The wedge block (10) is engaged inside the wedge groove. One side of the wedge block (10) is fixedly connected to the corresponding electrical component (11). A threaded hole is provided at the bottom of the wedge groove. The first threaded rod (9) is threaded into the inside of the threaded hole. One end of the first threaded rod (9) abuts against the side of the wedge block (10) near the opening of the wedge groove.

3. The harmonic suppression photovoltaic inverter according to claim 1, characterized in that, The first limiting mechanism includes an L-shaped plate (6) and a crossbar (7). Side plates (4) are fixedly provided on both sides of the top of the inverter housing (1). The crossbar (7) is rotatably disposed between the two side plates (4). Connecting blocks (5) are fixedly provided on the upper side of the multiple L-shaped plates (6). The connecting blocks (5) are fixedly sleeved on the bar wall of the crossbar (7). The multiple L-shaped plates (6) and the corresponding rotating plates (3) abut against the side away from the inverter housing (1). A second limiting mechanism for the rotation of the crossbar (7) is provided on the outer wall of one side plate (4).

4. The harmonic suppression photovoltaic inverter according to claim 3, characterized in that, The second limiting mechanism includes a second threaded rod (13) and a fixing block (12). The fixing block (12) is fixedly disposed on the outer wall of the side plate (4) on one side. The second threaded rod (13) is threadedly sleeved in the middle of the fixing block (12). One end of the crossbar (7) is provided with an insertion hole, and one end of the second threaded rod (13) is inserted into the insertion hole.

5. The harmonic suppression photovoltaic inverter according to claim 1, characterized in that, Mounting plates (2) are fixedly installed on both outer walls of the inverter housing (1).

6. The harmonic suppression photovoltaic inverter according to claim 1, characterized in that, The inverter housing (1) has multiple wire holes (8) on the inner wall of the side away from the rotating plate (3).

7. The harmonic suppression photovoltaic inverter according to claim 1, characterized in that, The lower ends of all of the rotating plates (3) are rounded and chamfered.

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