Quick turn-off control device for silicon controlled rectifier

Abstract

The utility model discloses a silicon controlled rectifier rapid turn-off control device, which belongs to the technical field of photovoltaic power station control devices and comprises a rapid turn-off controller body. The fast turn-off controller further comprises a protective shell, and cooling fins are arranged in the protective shell and installed on the top of the fast turn-off controller body through screws. Two groups of cooling fans are further included; the heat dissipation fins are arranged, the structure is simple, convenience and practicability are achieved, heat in the fast turn-off controller body can be conducted to the heat dissipation fins, heat dissipation of the fast turn-off controller body is accelerated, air circulation in the fast turn-off controller body can be accelerated through the heat dissipation fan, the heat dissipation performance is improved, and the service life of the controller body is prolonged. And meanwhile, the heat dissipation fan can accelerate air flow on the surfaces of the heat dissipation fins, the heat dissipation performance of the device is further improved, through arrangement of the sun shield, direct sunlight can be reduced, too high heat in the rapid turn-off controller body is avoided, and the turn-off speed and reliability are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power station control device technology, specifically a thyristor fast shutdown control device. Background Technology

[0002] A thyristor, or silicon controlled rectifier, is a high-power semiconductor device with a four-layer structure and three PN junctions. Utilizing its conduction and turn-off characteristics, it enables contactless switching control of circuits, replacing traditional mechanical switches and improving circuit reliability and lifespan. Due to its characteristics, a thyristor quickly turns off when a reverse voltage is applied between its anode and cathode. In some circuits, the control circuit rapidly changes the voltage polarity across the thyristor when it needs to be turned off, subjecting it to a reverse voltage to achieve rapid turn-off. Therefore, thyristors are used in rapid turn-off control devices, primarily applied in photovoltaic power plants of various sizes, including centralized and distributed systems. These devices ensure the safety of the photovoltaic system during operation, protecting personnel and equipment from dangers such as high voltage and high current. When an abnormal situation is detected in the photovoltaic power plant, such as overcurrent, overvoltage, leakage, or an emergency shutdown signal is received, the rapid turn-off control device disconnects the photovoltaic modules from the grid or disconnects the connections between the photovoltaic modules, quickly reducing the voltage of the photovoltaic system to a safe level to prevent the accident from escalating.

[0003] A search revealed that Chinese Patent Publication No. CN220732713U discloses a rapid shutdown control device for a photovoltaic power station, comprising a control device body. Two sets of exhaust windows are bolted to the inner wall of the control device body. Control boxes are bolted to both sides of the control device body. A drive mechanism is installed inside the control box, comprising a brake motor, a first gear, a second gear, and a synchronous belt. Cleaning mechanisms are installed on both sides of the control device body, comprising a sliding frame, a threaded rod, a threaded sleeve, a fixed rod, a connecting rod, a fixed box, and a cleaning roller. This application, through the coordinated use of the drive mechanism, cleaning mechanism, and related components, offers simple operation, eliminates the need for manual wiping, and possesses a certain degree of automation, facilitating rapid cleaning of dust accumulated in the exhaust windows.

[0004] However, this device also has the following drawbacks:

[0005] When a thyristor is working, it generates a lot of heat. This heat accumulates inside the device, causing the thyristor to overheat, which degrades its performance and may even lead to thermal runaway. This affects the turn-off speed and reliability, and in severe cases, it can damage the thyristor. The device dissipates heat through an exhaust window, which is not very effective. The device does not solve this problem. Utility Model Content

[0006] The purpose of this invention is to provide a thyristor fast shutdown control device. By setting heat dissipation fins, the heat inside the fast shutdown controller body can be conducted to the heat dissipation fins, thereby accelerating the heat dissipation of the fast shutdown controller body. By setting a cooling fan, the air circulation inside the fast shutdown controller body can be accelerated, improving the heat dissipation performance. At the same time, the cooling fan can also accelerate the air flow on the surface of the heat dissipation fins, further improving the heat dissipation performance of this device, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A thyristor fast shutdown control device includes a fast shutdown controller body;

[0009] It also includes a protective shell, inside which heat dissipation fins are provided, which are installed on the top of the quick-shutdown controller body by screws;

[0010] It also includes two sets of cooling fans, which are installed on one side of the protective shell;

[0011] It also includes a sun visor, on which two sets of connecting rods are fixedly installed on both sides, and the bottom of the connecting rods is fixedly installed on both sides of the protective shell.

[0012] Preferably, the fast shutdown controller body has connection sockets on both sides for connecting to external devices, and multiple air inlets are provided below the connection sockets.

[0013] Preferably, a filter plate is provided on the outside of the air inlet, and filter holes are formed on the surface of the filter plate. The filter plate is fixedly installed on both sides of the quick-shutdown controller body.

[0014] Preferably, the top side of the fast shutdown controller body is provided with several sets of heat dissipation holes, which are located inside the protective shell.

[0015] Preferably, the heat dissipation fins form a heat dissipation air duct between the fins, with one end of the heat dissipation air duct facing the heat dissipation hole and the other end of the heat dissipation air duct facing the cooling fan.

[0016] Preferably, the protective shell is disposed on the outside of the quick-shutdown controller body, and the protective shell is installed on the outer surface of the quick-shutdown controller body by screws.

[0017] Preferably, a protective cover is provided on the outside of the cooling fan, and the protective cover is fixedly connected to the protective shell.

[0018] Preferably, a mounting plate is fixedly installed on one side of the bottom of the quick shutdown controller body, and the mounting plate has mounting holes on its surface.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This utility model features a simple and convenient heat dissipation fin design. The fins transfer heat from the inside of the fast shutdown controller to the heat dissipation unit, accelerating heat dissipation. A cooling fan further enhances heat dissipation by accelerating air circulation within the controller and improving airflow over the fins. Additionally, the fan accelerates airflow across the fins, further improving heat dissipation. A sunshade reduces direct sunlight, preventing excessive heat buildup and ensuring both fast shutdown speed and reliability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the protective shell;

[0023] Figure 3 A schematic diagram of the main structure of the fast shutdown controller;

[0024] Figure 4 This is a schematic diagram of the internal structure of the protective shell.

[0025] In the diagram: 1. Quick-shutdown controller body; 2. Protective shell; 3. Heat dissipation fins; 4. Cooling fan; 5. Sunshade; 6. Connecting rod; 7. Connecting socket; 8. Air inlet; 9. Filter plate; 10. Heat dissipation hole; 11. Heat dissipation duct; 12. Protective cover; 13. Mounting plate; 14. Mounting hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-4 This utility model provides a technical solution:

[0028] A thyristor fast shutdown control device includes a fast shutdown controller body 1. Connection sockets 7 for connecting to external devices are installed on both sides of the fast shutdown controller body 1. Multiple sets of air inlets 8 are opened below the connection sockets 7. A filter plate 9 is arranged outside the air inlets 8, and filter holes are opened on the surface of the filter plate 9. The filter plate 9 is fixedly installed on both sides of the fast shutdown controller body 1. Several sets of heat dissipation holes 10 are opened on one side of the top of the fast shutdown controller body 1, and the heat dissipation holes 10 are located inside a protective shell 2. A mounting plate 13 is fixedly installed on one side of the bottom of the fast shutdown controller body 1, and mounting holes 14 are opened on the surface of the mounting plate 13.

[0029] By opening a heat dissipation hole 10 on one side of the top of the fast shutdown controller body 1, hot air flowing upward can be discharged from the interior of the fast shutdown controller body 1 through the heat dissipation hole 10. By opening air inlets 8 on both sides of the bottom of the fast shutdown controller body 1, external air can be allowed to enter the interior of the fast shutdown controller body 1, thereby accelerating airflow and facilitating heat dissipation. By setting a filter plate 9, the air entering the interior of the fast shutdown controller body 1 can be filtered to reduce dust or other foreign objects from entering the interior of the fast shutdown controller body 1, ensuring the normal operation of the fast shutdown controller body 1.

[0030] It also includes a protective shell 2, which is located on the outside of the fast shutdown controller body 1. The protective shell 2 is installed on the outer surface of the fast shutdown controller body 1 by screws. The protective shell 2 is provided with heat dissipation fins 3, which are installed on the top of the fast shutdown controller body 1 by screws. The heat dissipation fins 3 form a heat dissipation channel 11 between the fins. One end of the heat dissipation channel 11 faces the heat dissipation hole 10, and the other end of the heat dissipation channel 11 faces the cooling fan 4. It also includes two sets of cooling fans 4, which are installed on one side of the protective shell 2. The outer side of the cooling fan 4 is provided with a protective cover 12, which is fixedly connected to the protective shell 2.

[0031] By setting up the protective shell 2, the heat dissipation fins 3 can be protected, and a relatively closed space can be formed to ensure that the air flows along the preset route, thereby improving the heat dissipation efficiency. By setting up the heat dissipation fins 3, the heat inside the quick shutdown controller body 1 can be conducted to the heat dissipation fins 3, thereby accelerating the heat dissipation inside the quick shutdown controller body 1. By setting up the cooling fan 4, the air flow inside the protective shell 2 and the quick shutdown controller body 1 can be accelerated, thereby further accelerating the heat dissipation of the heat dissipation fins 3 and the quick shutdown controller body 1, greatly improving the heat dissipation efficiency. By setting up the protective cover 12, the cooling fan 4 can be protected.

[0032] It also includes a sunshade 5, on both sides of which two sets of connecting rods 6 are fixedly installed, and the bottom of the connecting rods 6 is fixedly installed on both sides of the protective shell 2.

[0033] By setting up the sunshade 5, the fast shutdown controller body 1 can be prevented from being exposed to direct sunlight, thereby preventing the fast shutdown controller body 1 from overheating due to sun exposure, ensuring that the fast shutdown controller body 1 can operate normally, and improving the service life of the fast shutdown controller body 1.

[0034] In practical use, the device is installed in the designated location. When the fast shutdown controller body 1 is working, the heat generated inside it is conducted to the heat dissipation fins 3, thereby accelerating the heat dissipation inside the fast shutdown controller body 1. At the same time, the cooling fan 4 is turned on, and the cooling fan 4 quickly draws out the air inside the protective shell 2, thereby creating a negative pressure inside the protective shell 2. Under the influence of the negative pressure, the air inside the fast shutdown controller body 1 is drawn into the protective shell 2. External air enters the fast shutdown controller body 1 through the air inlet 8. The heat dissipation is accelerated by accelerating the airflow inside the fast shutdown controller body 1. At the same time, the cooling fan 4 also accelerates the airflow on the surface of the heat dissipation fins 3 when it is working, thereby accelerating the heat dissipation.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thyristor fast turn-off control device, characterized in that: Includes the fast shutdown controller body (1); It also includes a protective shell (2), inside which heat dissipation fins (3) are provided, and the heat dissipation fins (3) are installed on the top of the quick shut-off controller body (1) by screws; It also includes two sets of cooling fans (4), which are installed on one side of the protective shell (2); It also includes a sunshade (5), on which two sets of connecting rods (6) are fixedly installed on both sides, and the bottom of the connecting rods (6) is fixedly installed on both sides of the protective shell (2).

2. The thyristor fast turn-off control device according to claim 1, characterized in that: The fast shutdown controller body (1) has connection sockets (7) for connecting to external devices on both sides, and multiple air inlets (8) are provided below the connection sockets (7).

3. The thyristor fast turn-off control device according to claim 2, characterized in that: A filter plate (9) is provided on the outside of the air inlet (8). The surface of the filter plate (9) is provided with filter holes. The filter plate (9) is fixedly installed on both sides of the quick shut-off controller body (1).

4. The thyristor fast turn-off control device according to claim 1, characterized in that: The top side of the fast shutdown controller body (1) is provided with several sets of heat dissipation holes (10), which are located inside the protective shell (2).

5. The thyristor fast turn-off control device according to claim 1, characterized in that: The heat dissipation fins (3) form a heat dissipation air duct (11) between the fins, one end of the heat dissipation air duct (11) faces the heat dissipation hole (10), and the other end of the heat dissipation air duct (11) faces the cooling fan (4).

6. The thyristor fast turn-off control device according to claim 1, characterized in that: The protective shell (2) is disposed on the outside of the fast shutdown controller body (1), and the protective shell (2) is installed on the outer surface of the fast shutdown controller body (1) by screws.

7. The thyristor fast turn-off control device according to claim 1, characterized in that: The cooling fan (4) is provided with a protective cover (12) on its outer side, and the protective cover (12) is fixedly connected to the protective shell (2).

8. The thyristor fast turn-off control device according to claim 1, characterized in that: A mounting plate (13) is fixedly installed on one side of the bottom of the fast shutdown controller body (1), and mounting holes (14) are provided on the surface of the mounting plate (13).

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