Photovoltaic power generation string intelligent connecting device capable of automatically breaking circuit in case of fault

Abstract

The utility model belongs to the technical field of photovoltaic power generation, and particularly relates to a photovoltaic power generation group string intelligent connecting device capable of automatically breaking a circuit in a fault, which comprises a support, a plurality of groups of photovoltaic panels are arranged above the support, junction boxes are respectively arranged on one sides of the lower parts of the plurality of groups of photovoltaic panels, and an input line is arranged on one side of each junction box. The other end of the input line is provided with a connecting device, the connecting device is arranged between the two groups of photovoltaic panels, the two ends of the interior of the connecting device are respectively provided with a positioning device, and the two ends of one side of the connecting device are respectively provided with an output line. The photovoltaic power generation set can be better detected and protected, adjustment can be carried out according to the size and specification of a photovoltaic panel, a worker can rapidly disassemble and assemble the connecting device, the photovoltaic panel can be conveniently maintained, a large amount of time and energy of the worker are saved, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic power generation technology, specifically relating to an intelligent connection device for photovoltaic power generation strings that automatically disconnects from the circuit in case of a fault. Background Technology

[0002] To meet different power output demands, most photovoltaic panels are connected in series or in parallel. By combining series and parallel connections appropriately, the output voltage and current can be effectively adjusted to adapt to different electrical equipment and grid connection requirements.

[0003] However, currently, when photovoltaic panels are used in series, if one set of photovoltaic panels fails, the entire photovoltaic power generation unit will stop supplying power, requiring timely maintenance by staff, which affects the overall power generation efficiency. Furthermore, the connection devices on the photovoltaic panels cannot be adjusted according to the size and specifications of the photovoltaic panels, making it difficult to fix them on the photovoltaic panels, increasing the workload of staff and reducing their work efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an intelligent connection device for photovoltaic power generation strings that automatically disconnects from the grid in case of a fault. This device can better detect and protect the photovoltaic power generation array and can be adjusted according to the size and specifications of the photovoltaic panels. It allows staff to quickly install and disassemble the connection device, facilitating the maintenance of the photovoltaic panels, saving staff a lot of time and energy, and improving work efficiency.

[0005] The specific technical solution adopted by this utility model is as follows:

[0006] A smart connection device for photovoltaic power generation strings that automatically disconnects from the circuit in case of a fault includes:

[0007] The bracket has multiple sets of photovoltaic panels mounted on top. Each set of photovoltaic panels has a junction box on one side below it. Each junction box has an input line on one side and a connecting device at the other end of the input line. The connecting device is positioned between two sets of photovoltaic panels. The connecting device has positioning devices at both ends inside and output lines at both ends on one side of it.

[0008] In one preferred embodiment of this utility model, the connecting device includes a housing, with an output interface and an input interface fixedly connected to both sides of the housing, and a first circuit breaker and a second circuit breaker fixedly connected to both ends inside the housing, with a control switch provided above the first circuit breaker and the second circuit breaker, and the first circuit breaker and the second circuit breaker fixedly connected through the control switch, and a sensor provided at one end inside the housing, and the sensor fixedly connected to the housing.

[0009] In one preferred embodiment of this utility model, the positioning device includes a fixing block, which is fixedly connected to the housing. A slider is provided inside the fixing block, a connecting rod is fixedly connected below the slider, a positioning block is fixedly connected below the connecting rod, a positioning spring is provided on the connecting rod, and the upper part of the positioning spring is fixedly connected to the slider, and the lower part of the positioning spring is fixedly connected to the fixing block.

[0010] In one preferred embodiment of this utility model, the lower end of the fixing block has a cross-shaped groove, which matches the positioning block. A sliding groove is formed above the cross-shaped groove, and the positioning spring and the slider are respectively disposed in the sliding groove, with the connecting rod passing through the bottom of the sliding groove.

[0011] In one preferred embodiment of this utility model, the first circuit breaker and the second circuit breaker switch are designed in opposite states, and the sensor is used to detect the current and voltage status at the input interface.

[0012] The technical effects achieved by this utility model are as follows:

[0013] This utility model discloses an intelligent connection device for photovoltaic power generation strings that automatically disconnects in case of a fault. When a photovoltaic panel malfunctions, the sensors in the connection device detect drastic changes in the voltage and current of the photovoltaic panel, thereby moving the control switches above the first and second circuit breakers. This causes the first circuit breaker to close while the second circuit breaker opens, enabling the connection device to operate in series and preventing interference with other photovoltaic power generation. This allows staff to accurately maintain faulty photovoltaic panels, saving them significant time and effort and improving work efficiency.

[0014] When the photovoltaic panels are being maintained, the positioning device is controlled to pull up the positioning block. The cooperation between the slider, positioning spring, and connecting rod in the positioning device allows the positioning block to be pulled out of the cross-shaped groove and rotated so that the positioning block is parallel to the gap between the two sets of photovoltaic panels. Under the action of the positioning spring, the positioning block moves back into the cross-shaped groove, allowing the connecting device to be removed from under the two sets of photovoltaic panels for maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this practical application;

[0016] Figure 2 This is a side view of the book;

[0017] Figure 3 This is a partial structural diagram of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the casing of this practical product;

[0019] Figure 5 This is a schematic diagram of the structure of this practical positioning device.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Bracket; 2. Photovoltaic panel; 3. Junction box; 4. Input line; 5. Connecting device; 501. Housing; 502. Output interface; 503. Input interface; 504. First circuit breaker; 505. Second circuit breaker; 506. Control switch; 6. Output line; 7. Positioning device; 701. Fixing block; 702. Sliding block; 703. Positioning spring; 704. Connecting rod; 705. Positioning block; 706. Slide groove; 707. Cross-shaped groove; 8. Sensor. Detailed Implementation

[0022] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific implementations of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0023] like Figures 1 to 5 As shown, a photovoltaic power generation string intelligent connection device with automatic fault disconnection includes a bracket 1. Multiple photovoltaic panels 2 are arranged on the top of the bracket 1. Junction boxes 3 are respectively arranged on one side of the multiple photovoltaic panels 2. An input line 4 is arranged on one side of the junction box 3. A connecting device 5 is arranged at the other end of the input line 4. The connecting device 5 is arranged between two photovoltaic panels 2. Positioning devices 7 are respectively arranged at both ends inside the connecting device 5. Output lines 6 are respectively arranged at both ends of one side of the connecting device 5.

[0024] In this implementation scheme, when photovoltaic panel 2 malfunctions, the current and voltage generated by photovoltaic panel 2 change drastically. This causes a similar drastic change in the current and voltage inside junction box 3, which in turn causes a change in the current and voltage inside input line 4 on one side of junction box 3. Consequently, the current and voltage entering input interface 503 from input line 4 change drastically. At this time, sensor 8 detects the drastic change in the current and voltage flowing into input interface 503, thereby moving the control switch 506 above the first circuit breaker 504 and the second circuit breaker 505. This causes the first circuit breaker 504 to close, while the second circuit breaker 505 opens, allowing the current from other photovoltaic panel 2 power generation units to flow normally through the second circuit breaker from output interface 502 and into output line 6, enabling the power generated by photovoltaic panel 2 to be utilized. When maintaining the photovoltaic panel 2, the positioning block 705 in the positioning device 7 is moved. The positioning block 705 moves within the cross-shaped groove 707, causing the connecting rod 704 on the other side of the positioning block 705 to move within the slide groove 706. This causes the slider 702 at the other end of the connecting rod 704 to move within the slide groove 706, pressing the positioning spring 703 within the slide groove 706. When the positioning block 705 disengages from the cross-shaped groove 707, it rotates 90 degrees, aligning the positioning block 705 with the gap between the two sets of photovoltaic panels 2. The positioning block 705 is then released, and under the action of the positioning spring 703, it moves back into the cross-shaped groove 707. This allows the connecting device 5 to be removed from under the two sets of photovoltaic panels 2, enabling maintenance of both the connecting device 5 and the photovoltaic panels 2, thus completing a series of tasks.

[0025] like Figure 3 and Figure 4 As shown, the connecting device 5 includes a housing 501. An output interface 502 and an input interface 503 are fixedly connected to both sides of the housing 501, respectively. A first circuit breaker 504 and a second circuit breaker 505 are fixedly connected to both ends inside the housing 501, respectively. A control switch 506 is provided above the first circuit breaker 504 and the second circuit breaker 505, and the first circuit breaker 504 and the second circuit breaker 505 are fixedly connected through the control switch 506. A sensor 8 is provided at one end inside the housing 501, and the sensor 8 is fixedly connected to the housing 501.

[0026] In the above method, when photovoltaic panel 2 malfunctions, the current and voltage generated by photovoltaic panel 2 change drastically, causing the current and voltage inside junction box 3 to change drastically as well. This causes the current and voltage inside input line 4 on one side of junction box 3 to change, resulting in a drastic change in the current and voltage entering input interface 503 from input line 4. At this time, sensor 8 detects the drastic change in the current and voltage flowing into input interface 503, thereby moving the control switch 506 above the first circuit breaker 504 and the second circuit breaker 505. This causes the first circuit breaker 504 to close, while the second circuit breaker 505 opens, allowing the current from other photovoltaic panel 2 power generation groups to flow normally through the second circuit breaker from output interface 502 and into output line 6, so that the power generated by photovoltaic panel 2 can be utilized.

[0027] like Figure 5 As shown, the positioning device 7 includes a fixing block 701, which is fixedly connected to the housing 501. A slider 702 is provided inside the fixing block 701. A connecting rod 704 is fixedly connected below the slider 702. A positioning block 705 is fixedly connected below the connecting rod 704. A positioning spring 703 is provided on the connecting rod 704. The upper part of the positioning spring 703 is fixedly connected to the slider 702, and the lower part of the positioning spring 703 is fixedly connected to the fixing block 701.

[0028] like Figure 3 and Figure 5 As shown, the lower end of the fixing block 701 has a cross-shaped groove 707, which matches the positioning block 705. A sliding groove 706 is provided above the cross-shaped groove 707. The positioning spring 703 and the slider 702 are respectively set in the sliding groove 706, and the connecting rod 704 passes through the bottom of the sliding groove 706.

[0029] In the above method, when maintaining the photovoltaic panel 2, the positioning block 705 in the positioning device 7 is moved. The positioning block 705 moves within the cross-shaped groove 707, causing the connecting rod 704 on the other side of the positioning block 705 to move within the slide groove 706. This causes the slider 702 at the other end of the connecting rod 704 to move within the slide groove 706, thus squeezing the positioning spring 703 within the slide groove 706. When the positioning block 705 disengages from the cross-shaped groove 707, it rotates 90 degrees, making the positioning block 705 parallel to the gap between the two sets of photovoltaic panels 2. The positioning block 705 is then released, and under the action of the positioning spring 703, it moves back into the cross-shaped groove 707. This allows the connecting device 5 to be removed from under the two sets of photovoltaic panels 2, enabling maintenance of both the connecting device 5 and the photovoltaic panels 2.

[0030] like Figure 4As shown, the first circuit breaker 504 and the second circuit breaker 505 are designed in opposite states, and the sensor 8 is used to detect the current and voltage status at the input interface 503.

[0031] In the above method, when the photovoltaic panel 2 malfunctions, the sensor 8 detects a drastic change in the current and voltage flowing into the input interface 503 of the photovoltaic panel 2, thereby moving the control switch 506 above the first circuit breaker 504 and the second circuit breaker 505. At this time, the first circuit breaker 504 closes, and the second circuit breaker 505 starts to connect, so that the current in other photovoltaic panel 2 power generation groups can flow normally through the second circuit breaker from the output interface 502 and enter the output line 6, so that the power generated by the photovoltaic panel 2 can be utilized.

[0032] The working principle of this utility model is as follows: When photovoltaic panel 2 malfunctions, the current and voltage generated by photovoltaic panel 2 change drastically, causing the current and voltage inside junction box 3 to change drastically as well. This, in turn, causes changes in the current and voltage inside input line 4 on one side of junction box 3, resulting in drastic changes in the current and voltage entering input interface 503. At this time, sensor 8 detects the drastic changes in the current and voltage flowing into input interface 503, thereby moving the control switch 506 above the first circuit breaker 504 and the second circuit breaker 505. This causes the first circuit breaker 504 to close, while the second circuit breaker 505 opens, allowing the current from other photovoltaic panel 2 power generation units to flow normally through the second circuit breaker from output interface 502 and into output line 6, enabling the power generated by photovoltaic panel 2 to be utilized. When maintaining the photovoltaic panel 2, the positioning block 705 in the positioning device 7 is moved. The positioning block 705 moves within the cross-shaped groove 707, causing the connecting rod 704 on the other side of the positioning block 705 to move within the slide groove 706. This causes the slider 702 at the other end of the connecting rod 704 to move within the slide groove 706, pressing the positioning spring 703 within the slide groove 706. When the positioning block 705 disengages from the cross-shaped groove 707, it rotates 90 degrees, aligning the positioning block 705 with the gap between the two sets of photovoltaic panels 2. The positioning block 705 is then released, and under the action of the positioning spring 703, it moves back into the cross-shaped groove 707. This allows the connecting device 5 to be removed from under the two sets of photovoltaic panels 2, enabling maintenance of both the connecting device 5 and the photovoltaic panels 2, thus completing a series of tasks.

[0033] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A smart connection device for photovoltaic power generation strings that automatically disconnects from the circuit in case of a fault, characterized in that: include: A bracket (1) is provided above the bracket (1), and a junction box (3) is provided on one side below the multiple sets of photovoltaic panels (2). An input line (4) is provided on one side of the junction box (3), and a connecting device (5) is provided at the other end of the input line (4). The connecting device (5) is located between two sets of photovoltaic panels (2). A positioning device (7) is provided at both ends inside the connecting device (5), and an output line (6) is provided at both ends on one side of the connecting device (5).

2. The intelligent connection device for automatic fault disconnection of photovoltaic power generation strings according to claim 1, characterized in that: The connecting device (5) includes a housing (501), with an output interface (502) and an input interface (503) fixedly connected to both sides of the housing (501). A first circuit breaker (504) and a second circuit breaker (505) are fixedly connected to both ends inside the housing (501). A control switch (506) is provided above the first circuit breaker (504) and the second circuit breaker (505), and the first circuit breaker (504) and the second circuit breaker (505) are fixedly connected through the control switch (506). A sensor (8) is provided at one end inside the housing (501), and the sensor (8) is fixedly connected to the housing (501).

3. The intelligent connection device for automatic fault disconnection of photovoltaic power generation strings according to claim 2, characterized in that: The positioning device (7) includes a fixing block (701), which is fixedly connected to the housing (501). A slider (702) is provided inside the fixing block (701). A connecting rod (704) is fixedly connected below the slider (702). A positioning block (705) is fixedly connected below the connecting rod (704). A positioning spring (703) is provided on the connecting rod (704). The positioning spring (703) is fixedly connected above the slider (702) and below the fixing block (701).

4. The intelligent connection device for automatic fault disconnection of photovoltaic power generation strings according to claim 3, characterized in that: The lower end of the fixing block (701) has a cross-shaped groove (707) that matches the positioning block (705). A sliding groove (706) is provided above the cross-shaped groove (707). The positioning spring (703) and the slider (702) are respectively disposed in the sliding groove (706), and the connecting rod (704) passes through the bottom of the sliding groove (706).

5. The intelligent connection device for automatic fault disconnection of photovoltaic power generation strings according to claim 2, characterized in that: The first circuit breaker (504) and the second circuit breaker (505) are designed in opposite states, and the sensor (8) is used to detect the current and voltage status at the input interface (503).

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