Photovoltaic combiner with shunt current monitoring

Abstract

The application discloses a photovoltaic combiner cabinet with shunt current monitoring, and relates to the technical field of photovoltaic combiner cabinets.The photovoltaic combiner cabinet comprises a main cabinet and a base, the inside of the main cabinet is provided with a partition plate, and the upper portion of the partition plate is provided with a monitoring outer frame.The photovoltaic combiner cabinet with shunt current monitoring is characterized in that the shunt current wire is arranged in the inside of the guide frame through the design of an auxiliary assembly, and the electromagnetic iron No.2 and the magnetic block connected with the electromagnetic iron No.2 can magnetically attract the limiting plate made of metal material due to the shunt current conduction design of the photovoltaic combiner cabinet, so that the limiting plate is forced to compress the connecting spring due to the magnetic attraction, and then the pressure sensor and the limiting plate are moved to limit the shunt current wire, which is beneficial to the current monitoring and limiting of the shunt current wire in the current photovoltaic combiner cabinet, so that the shunt current wire in the photovoltaic combiner cabinet can be kept stable during connection, and the connection part is prevented from loosening.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic combiner cabinet technology, specifically a photovoltaic combiner cabinet with branch current monitoring. Background Technology

[0002] Solar combiner box, solar photovoltaic combiner box, photovoltaic array lightning protection combiner box, solar power generation combiner box, photovoltaic power generation combiner box, photovoltaic lightning protection combiner box, solar surge protector, solar photovoltaic surge protector, photovoltaic surge protector, and photovoltaic distribution cabinet are all referred to by this name.

[0003] For example, utility model application number 202323598202.4 discloses a photovoltaic combiner electrical cabinet, which includes: a cabinet body, two vertical rods on the inner wall of the cabinet body, a sliding rod in the middle of each of the two vertical rods, multiple sliders slidably connected to the outside of each of the two sliding rods, connecting blocks on the side walls of each of the multiple sliders, horizontal rods on the side walls of the connecting blocks, multiple mounting holes in the middle of each of the multiple horizontal rods, a ventilation opening on the back of the cabinet body, two mounting rods on the back of the cabinet body, mounting plates slidably connected inside the two mounting rods, and a filter screen in the middle of the mounting plate. The above structure utilizes the cooperation of sliding rods and sliders, and connects the crossbars and sliders with connecting blocks, facilitating the adjustment of the distance between the crossbars and the installation of different equipment. A filter screen filters external dust during the electrical cabinet's heat dissipation, preventing dust from entering the cabinet and damaging the equipment. However, during long-term operation, the branch current wiring connections of the photovoltaic combiner cabinet may age and loosen, which is difficult for users to detect in time. This makes it inconvenient to monitor the current of the branch wires in the photovoltaic combiner cabinet while simultaneously preventing loosening of the wiring connections, leading to loosening during current monitoring of the branch wires and affecting monitoring efficiency.

[0004] Therefore, in view of this, we studied and improved the existing structure and its shortcomings, and proposed a photovoltaic combiner cabinet with branch current monitoring. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a photovoltaic combiner cabinet with shunt current monitoring, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a photovoltaic combiner cabinet with shunt current monitoring, comprising a main cabinet and a base. The main cabinet has an internal partition plate, and a monitoring frame is mounted above the partition plate. The monitoring frame contains auxiliary components for detecting shunt current. These auxiliary components include an electromagnet, a connecting spring, a guide frame, a pressure sensor, and a limiting plate. A magnetic block is mounted on one side of the electromagnet, and a pressure sensor is mounted on the end of the magnetic block. A limiting plate is mounted on one side of the pressure sensor. A shunt wire is connected between the electromagnet and the pressure sensor. Guide frames are mounted on both the front and rear sides of the monitoring frame. The base is located at the bottom of the main cabinet.

[0007] Furthermore, the front of the main cabinet is fitted with an upper door via a hinge, and a middle door is located below the upper door.

[0008] Furthermore, a lower door is installed below the middle door, and both the middle door and the lower door have viewing windows inside.

[0009] Furthermore, the partition plate is equipped with monitoring components for auxiliary positioning, and the monitoring components are distributed in a one-to-one correspondence with the partition plate.

[0010] Furthermore, the monitoring component includes a built-in slot, an electromagnet, and a circuit breaker, with the electromagnet installed inside the built-in slot, and the input terminal of the electromagnet electrically connected to the circuit breaker via a wire.

[0011] Furthermore, the electromagnet has a built-in plate magnetically attracted to it, and the length of the built-in plate is less than the length of the partition plate.

[0012] Furthermore, side plates are installed on both sides of the built-in plate, and the top plate is fixed to the side plates by bolts.

[0013] Furthermore, an installation plate is fixedly mounted on the outer surface of the top plate by bolts, and a telescopic rod is provided at the bottom of the installation plate.

[0014] Furthermore, a monitoring frame is installed at the bottom of the telescopic rod, and the interior of the monitoring frame has a hollow structure.

[0015] Furthermore, the built-in plate is slidably disposed on the outer surface of the partition plate, and the partition plate and the built-in plate are distributed in a one-to-one correspondence.

[0016] This invention provides a photovoltaic combiner cabinet with shunt current monitoring, which has the following advantages: 1. This photovoltaic combiner cabinet with shunt current monitoring, through the design of auxiliary components, allows the shunt current conductors to pass through the interior of the guide frame. Due to the conductive design of the shunt current in the photovoltaic combiner cabinet, the electromagnet and the magnetic block connected to it magnetically attract a metal limiting plate. This magnetic attraction compresses the connecting spring, causing the pressure sensor and the limiting plate to move towards and limit the shunt current wires. This allows for simultaneous current monitoring and limiting of the shunt current wires in the photovoltaic combiner cabinet, ensuring stable connections and preventing loosening. It solves the problem of separating monitoring and fixing functions in conventional combiner cabinets, ensuring stable current transmission and reducing power generation losses caused by loose wiring.

[0017] 2. This photovoltaic combiner cabinet with shunt current monitoring can increase the magnetism of electromagnet II when the current in the shunt current wires increases, and decrease the magnetism of electromagnet II when the current in the shunt current wires increases. The current in the shunt current wires in the photovoltaic combiner cabinet can be observed by the limiting force of the pressure sensor on the wires. When the pressure sensor exceeds the preset value, it indicates that the shunt current in the photovoltaic combiner cabinet is abnormal, which facilitates timely inspection and maintenance by the staff.

[0018] 3. This photovoltaic combiner cabinet with shunt current monitoring, through the design of the monitoring components, can utilize the circuit breaker design to interrupt the power supply to the electromagnet when the mounting components in the built-in panel are being inspected and maintained. This interrupts the power supply to the electromagnet by the wires in the photovoltaic combiner cabinet, causing the electromagnet to lose its magnetism. As a result, the top of the electromagnet is magnetically separated from the built-in panel, making it easier to move the built-in panel out of the main cabinet. This avoids the user from performing live operations when inspecting the mounting components of the built-in panel, and also provides sufficient maintenance space for the user to operate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a photovoltaic combiner cabinet with branch current monitoring according to the present invention; Figure 2 This is a schematic diagram of the internal structure of the main cabinet of a photovoltaic combiner cabinet with shunt current monitoring according to the present invention; Figure 3 This is a schematic diagram of the unfolded structure of the main cabinet of a photovoltaic combiner cabinet with shunt current monitoring according to the present invention; Figure 4 This is a schematic diagram of the unfolded monitoring frame structure of a photovoltaic combiner cabinet with shunt current monitoring according to the present invention; Figure 5 This is a schematic diagram of the monitoring component structure of a photovoltaic combiner cabinet with shunt current monitoring according to the present invention; Figure 6This invention relates to a photovoltaic combiner cabinet with shunt current monitoring. Figure 4 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Main cabinet; 2. Upper door; 3. Middle door; 4. Lower door; 5. Viewing window; 6. Partition plate; 7. Top plate; 8. Side plate; 9. Internal plate; 10. Auxiliary slot; 11. Telescopic rod; 12. Monitoring frame; 13. Mounting plate; 14. Monitoring component; 1401. Internal slot; 1402. Electromagnet one; 1403. Circuit breaker; 15. Auxiliary component; 1501. Electromagnet two; 1502. Connecting spring; 1503. Guide frame; 1504. Pressure sensor; 1505. Limiting plate; 16. Magnetic block; 17. Base. Detailed Implementation

[0021] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0022] like Figures 1-6As shown, the present invention provides a technical solution: a photovoltaic combiner cabinet with shunt current monitoring, comprising a main cabinet 1, an upper door 2, a middle door 3, a lower door 4, a viewing window 5, a partition plate 6, a top plate 7, a side plate 8, an internal plate 9, an auxiliary slot 10, a telescopic rod 11, a monitoring frame 12, a mounting plate 13, a monitoring component 14, an internal slot 1401, an electromagnet 1402, a circuit breaker 1403, an auxiliary component 15, an electromagnet 2 1501, a connecting spring 1502, a guide frame 1503, a pressure sensor 1504, a limit plate 1505, a magnetic block 16, and a base 17. The main cabinet 1 has an internal partition plate 6, and the monitoring frame 12 is installed above the partition plate 6. The upper door 2 is mounted on the front side of the main cabinet 1 via a hinge. A middle door 3 is located below the main cabinet 1, and a lower door 4 is installed below the middle door 3. Both the middle door 3 and the lower door 4 have viewing windows 5 inside, allowing observation from the outside into the main cabinet 1. An auxiliary component 15 for detecting branch current is installed inside the monitoring frame 12. The auxiliary component 15 includes an electromagnet 1501, a connecting spring 1502, a guide frame 1503, a pressure sensor 1504, and a limiting plate 1505. A magnetic block 16 is located on one side of the electromagnet 1501, and a pressure sensor 1504 is installed at the end of the magnetic block 16. A limiting plate 1505 is located on one side of the pressure sensor 1504. A branch wire is installed between the electromagnet 1501 and the pressure sensor 1504. Guide frames 1503 are installed on both the front and rear sides of the 12. The base 17 is located at the bottom of the main cabinet 1. In specific operation, the operator introduces the branch current in the photovoltaic combiner cabinet through the transformer via wires to the input terminal of electromagnet 1501. While maintaining a constant voltage, the electromagnet 1501 is powered. The wires carrying the branch current pass through the inside of the guide frames 1503. Due to the design of the photovoltaic combiner cabinet, the electromagnet 1501 and the magnetic block 16 connected to it will magnetically attract the metal limiting plate 1505. As a result, the limiting plate 1505 will be compressed due to the magnetic attraction, and the pressure sensor 1504 and the limiting plate 1505 will be compressed. Electromagnet 505 moves towards the branch current wires, which helps to monitor the current of the branch current wires in the photovoltaic combiner cabinet while limiting their movement. This ensures the stability of the branch current wire connections and prevents loosening at the connection points. In addition, when the current in the branch current wires in the photovoltaic combiner cabinet increases, the magnetism of electromagnet 1501 increases, and vice versa. The current in the branch current wires in the photovoltaic combiner cabinet can be observed using the pressure sensor 1504 regarding the limiting force on the wires. When the pressure sensor 1504 experiences a force exceeding a preset value, it indicates an abnormality in the branch current in the photovoltaic combiner cabinet, facilitating timely inspection and maintenance by the staff.

[0023] like Figure 4 and Figure 5 As shown, the partition plate 6 is equipped with a monitoring component 14 for auxiliary positioning. The monitoring components 14 are distributed in a one-to-one correspondence with the partition plate 6. The monitoring component 14 includes an internal slot 1401, an electromagnet 1402, and a circuit breaker 1403. The internal slot 1401 is equipped with an electromagnet 1402. The input end of the electromagnet 1402 is electrically connected to the circuit breaker 1403 through a wire. The electromagnet 1402 magnetically attracts an internal plate 9. The length of the internal plate 9 is less than the length of the partition plate 6. The internal plate 9 is slidably disposed on the outer surface of the partition plate 6. The partition plate 6 and the internal plate 9 are distributed in a one-to-one correspondence. Side plates 8 are installed on both sides of the internal plate 9. The side plates 8 are fixed to the top plate 7 by bolts. Inside the main cabinet 1, the top plate 7, side plates 8, and internal plate 9 form a photovoltaic combiner installation area. The top plate 7 can be height adjusted relative to the side plates 8 by bolt design. The design of the main cabinet 1 allows users to adjust the space of the photovoltaic combiner unit according to their needs. It also protects the components of the main cabinet 1 from the outside. When inspecting or maintaining the components in the built-in panel 9, the circuit breaker 1403 can be used to block the power supply to the electromagnet 1402 via the wires in the photovoltaic combiner cabinet, causing the electromagnet 1402 to lose its magnetism. This separates the top of the electromagnet 1402 from the built-in panel 9, allowing the user to use tools to reach into the auxiliary groove 10 (with an insulating rubber pad on the inner wall) to pull the entire built-in panel 9 out of the partition plate 6. Sufficiently long wires are provided connecting the built-in panel 9 to facilitate its movement outside the main cabinet 1, preventing live operation during maintenance of the components in the built-in panel 9. This also provides sufficient maintenance space for user operation. like Figure 1 , Figure 2 and Figure 4 As shown, an installation plate 13 is fixedly mounted on the outer surface of the top plate 7 by bolts, and a telescopic rod 11 is provided at the bottom of the installation plate 13. A monitoring frame 12 is installed at the bottom of the telescopic rod 11, and the monitoring frame 12 has a hollow internal structure. The height of the monitoring frame 12 can be adjusted by the design of the telescopic rod 11. The length of the telescopic rod 11 after extension is fixed by bolts, which makes it easy for users to adapt to the needs of use. Through the design of the installation plate 13 and bolts, the installation can be adapted and adjusted according to the position of the conductor for monitoring the branch current in the photovoltaic combiner cabinet. The number can be adjusted according to the user's needs.

[0024] In summary, as Figures 1-6As shown, in operation, the photovoltaic combiner cabinet with shunt current monitoring uses a Hall sensor to detect the shunt current in the cabinet. Additionally, the operator introduces the shunt current from the photovoltaic combiner cabinet through a transformer and wires to the input terminal of electromagnet 1501. A constant current circuit is connected in series between the transformer and electromagnet 1501 to provide power to electromagnet 1501 while maintaining a constant voltage. The wires carrying the shunt current are inserted inside the guide frame 1503, allowing the electromagnet 1501 to conduct current due to the shunt current in the photovoltaic combiner cabinet. The electromagnet 1501 and the magnetic block 16 connected to it magnetically attract the metal limiting plate 1505. Therefore, the limiting plate 1505, due to magnetic attraction,... The fatigue-resistant stainless steel connecting spring 1502 is compressed, causing the pressure sensor 1504 and the limiting plate 1505 to move towards the branch current wire for limiting. This facilitates current monitoring and limiting of the branch current wires in the photovoltaic combiner cabinet, ensuring stable connection and preventing loosening. Furthermore, the electromagnet 1501's magnetism increases when the current in the branch current wire increases and decreases when the current decreases. The current in the branch current wire can be observed using the limiting force of the pressure sensor 1504 on the wire. When the pressure sensor 1504 exceeds the pre-set force... The setting indicates an abnormality in the branch current of the photovoltaic combiner cabinet. Hall effect sensors are used to detect the branch current, providing dual monitoring of the branch current for timely inspection and maintenance. The monitoring frame 12 is height-adjustable via a telescopic rod 11, the length of which is fixed with bolts, allowing for user adaptation. The mounting plate 13 and bolts allow for adjustment based on the location of the wires requiring branch current monitoring within the photovoltaic combiner cabinet; the number of mounting plates can be adjusted according to user needs. Inside the main cabinet 1, the top plate 7, side plates 8, and internal plate 9 form the photovoltaic combiner installation area. The top plate 7 can be height-adjusted relative to the side plate 8 via bolts. The design of the main cabinet 1 allows users to easily adjust the space for the photovoltaic combiner unit installations. It also provides external protection for the installations within the main cabinet 1. During maintenance of the components in the built-in panel 9, the circuit breaker 1403 can interrupt the power supply to the electromagnet 1402 via the wires in the photovoltaic combiner cabinet, causing the electromagnet 1402 to lose its magnetism. This magnetic separation between the top of the electromagnet 1402 and the built-in panel 9 allows the user to use tools to reach into the auxiliary groove 10 (with its inner wall insulated rubber pads) and pull the entire built-in panel 9 out of the partition plate 6. Sufficiently long wires connecting the built-in panel 9 are provided to facilitate its removal from the main cabinet 1.To prevent users from operating the mounting components of the built-in board 9 while maintaining sufficient maintenance space, the photovoltaic combiner cabinet collects current from multiple photovoltaic modules. Its branch currents can be drawn from the sampling points after the photovoltaic branch fuses or the busbars, avoiding direct power draw from the main circuit and thus preventing interference with the combiner function. Furthermore, the main cabinet 1 is equipped with a communication interface to upload pressure and current data to a remote monitoring platform, enabling remote fault alarms and data traceability.

[0025] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A photovoltaic combiner cabinet with shunt current monitoring, comprising a main cabinet (1) and a base (17), characterized in that: The main cabinet (1) is provided with a partition plate (6) inside, and a monitoring frame (12) is installed above the partition plate (6). The monitoring frame (12) is provided with an auxiliary component (15) for detecting the branch current. The auxiliary component (15) includes an electromagnet (1501), a connecting spring (1502), a guide frame (1503), a pressure sensor (1504), and a limiting plate (1505). A magnetic block (16) is provided on one side of the electromagnet (1501), and a pressure sensor (1504) is installed at the end of the magnetic block (16). A limiting plate (1505) is provided on one side of the pressure sensor (1504). A branch wire is provided between the electromagnet (1501) and the pressure sensor (1504). Guide frames (1503) are installed on both the front and rear sides of the monitoring frame (12). The base (17) is located at the bottom of the main cabinet (1).

2. A photovoltaic combiner cabinet with shunt current monitoring according to claim 1, characterized in that: The front of the main cabinet (1) is fitted with an upper door (2) via a hinge, and a middle door (3) is provided below the upper door (2).

3. A photovoltaic combiner cabinet with shunt current monitoring according to claim 2, characterized in that: A lower door (4) is installed below the middle door (3), and a viewing window (5) is provided inside the middle door (3) and the lower door (4).

4. A photovoltaic combiner cabinet with shunt current monitoring according to claim 1, characterized in that: The partition plate (6) is provided with a monitoring component (14) for auxiliary positioning, and the monitoring components (14) are distributed in a one-to-one correspondence with the partition plate (6).

5. A photovoltaic combiner cabinet with shunt current monitoring according to claim 4, characterized in that: The monitoring component (14) includes a built-in slot (1401), an electromagnet (1402) and a circuit breaker (1403), and the built-in slot (1401) is equipped with an electromagnet (1402), and the input end of the electromagnet (1402) is electrically connected to the circuit breaker (1403) through a wire.

6. A photovoltaic combiner cabinet with shunt current monitoring according to claim 5, characterized in that: The electromagnet (1402) is magnetically attracted to the built-in plate (9), and the length of the built-in plate (9) is less than the length of the partition plate (6).

7. A photovoltaic combiner cabinet with shunt current monitoring according to claim 6, characterized in that: The built-in plate (9) has side plates (8) installed on both sides, and the side plates (8) are fixed with top plates (7) by bolts.

8. A photovoltaic combiner cabinet with shunt current monitoring according to claim 7, characterized in that: The outer surface of the top plate (7) is fixed with a mounting plate (13) by bolts, and a telescopic rod (11) is provided at the bottom of the mounting plate (13).

9. A photovoltaic combiner cabinet with shunt current monitoring according to claim 8, characterized in that: The bottom of the telescopic rod (11) is equipped with a monitoring frame (12), and the inside of the monitoring frame (12) is a hollow structure.

10. A photovoltaic combiner cabinet with shunt current monitoring according to claim 9, characterized in that: The built-in plate (9) is slidably disposed on the outer surface of the partition plate (6), and the partition plate (6) and the built-in plate (9) are distributed in a one-to-one correspondence.

Images