Start-stop control and grid connection device of generator set

Abstract

The utility model discloses a start-stop control and grid connection device of a generator set, and relates to the technical field of generator sets. The start-stop control and grid connection device of the generator set comprises an intelligent rectifier cabinet and a wire inlet cabinet, the cabinet door limiting assembly comprises a rectifier cabinet side door, two supporting plates are fixedly connected to the inner wall of the intelligent rectifier cabinet, an electric push rod is fixedly connected to the interior of the intelligent rectifier cabinet, a connecting block is fixedly connected to the output end of the electric push rod, and a fixing frame is fixedly connected to the surface of the side, close to the supporting plates, of the rectifier cabinet side door. Through the arrangement of the supporting plate, the electric push rod, the connecting block and the fixing frame, the side face and the front face of the electric appliance mounting frame are conveniently exposed, the replacement efficiency of the excitation regulator is improved, meanwhile, the distance between the electric appliance mounting frame and the outside of the intelligent rectifier cabinet is conveniently adjusted through rotation and movement of the electric appliance mounting frame, and the practicability is high. The excitation regulator can be conveniently replaced by the electric appliance mounting rack at a proper angle and a proper position, and the safety of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of generator set technology, and in particular to a generator set start-stop control and grid connection device. Background Technology

[0002] To improve the safety, stability, and accuracy of generator synchronization and daily control, meet the excitation requirements of generators under various operating conditions, further advance power generation technology and quality control, improve the precision structure of exciters and auxiliary components, and create greater economic benefits for the safe and stable operation of generator sets.

[0003] Since the excitation regulator AVR is installed in the intelligent rectifier cabinet, and the AVR will age after long-term use, it needs to be replaced with spare parts when it reaches the end of its service life to ensure the stable and reliable operation of the excitation system. However, the wiring layout and connection inside the intelligent rectifier cabinet are complex, and the wiring is located inside the cabinet. When replacing the excitation regulator AVR, the electrician needs to go deep into the cabinet. Due to the obstruction of the side wall of the cabinet, it is not convenient for the electrician to replace the excitation regulator AVR. Moreover, during the replacement process, the electrician's body may come into contact with some exposed wires, causing electric shock and affecting the electrician's personal safety. Therefore, this utility model proposes a new solution. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a generator set start-stop control and grid connection device. This device can solve the problems of complex wiring layout and connection in intelligent rectifier cabinets, where the wiring is located inside the intelligent rectifier cabinet. When replacing the excitation regulator AVR, a part of the electrician's body needs to be inserted into the intelligent rectifier cabinet. Due to the obstruction of the side wall of the intelligent rectifier cabinet, it is not convenient for the electrician to replace the excitation regulator AVR. Moreover, during the replacement process, the electrician's body may come into contact with some exposed wires, causing electric shock and affecting the electrician's personal safety.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a generator set start-stop control and grid connection device, including an intelligent rectifier cabinet and an incoming line cabinet;

[0006] Excitation regulator mounting assembly, which is installed inside the intelligent rectifier cabinet;

[0007] Cabinet door limiting component, which is set inside the intelligent rectifier cabinet. The cabinet door limiting component includes the rectifier cabinet side door, which is hinged inside the intelligent rectifier cabinet. The front end of the rectifier cabinet side door is hinged to the rectifier cabinet front door. Two support plates are fixedly connected to the inner wall of the intelligent rectifier cabinet. The two support plates are located on the left inner wall and the front inner wall of the intelligent rectifier cabinet, respectively.

[0008] An electric push rod is fixedly connected inside the intelligent rectifier cabinet. A connecting block is fixedly connected to the output end of the electric push rod. A fixed frame is fixedly connected to the surface of the side door of the rectifier cabinet near the support plate. The connecting block is snapped into the fixed frame.

[0009] Preferably, the excitation regulator mounting assembly includes a limit frame, which is fixedly connected inside the intelligent rectifier cabinet, and a turntable is rotatably connected inside the limit frame;

[0010] A drive motor is fixedly connected to the front end of the turntable, and a second threaded rod is fixedly connected to the output end of the drive motor. The second threaded rod is rotatably connected to the turntable, and an electrical mounting bracket is threaded onto the surface of the second threaded rod. The electrical mounting bracket is slidably connected to the inner wall of the turntable.

[0011] An electrical mounting bracket is fixedly connected to the upper end of the electrical mounting frame. An excitation regulator, an AC switch, a DC switch, and an intelligent control unit are mounted on the surface of the electrical mounting bracket.

[0012] Preferably, the excitation regulator mounting assembly further includes a connecting plate, which is fixedly connected to the turntable. The connecting plate has a first threaded rod connected to its internal thread, and a handle is fixedly connected to the upper end of the first threaded rod.

[0013] The surface of the limit frame is provided with multiple threaded grooves, and the first threaded rod is threadedly connected to the corresponding threaded groove.

[0014] Preferably, the incoming line cabinet is internally fixedly connected to a patch panel, and the front end of the incoming line cabinet is hinged to an incoming line cabinet door, and the incoming line cabinet is internally connected to the intelligent rectifier cabinet.

[0015] Preferably, a detachable cable tray is fixedly installed on the rear side of the incoming line cabinet.

[0016] Preferably, a first cooling fan is fixedly connected to the top of the intelligent rectifier cabinet, three second cooling fans are fixedly connected to the inner wall of the intelligent rectifier cabinet, and a dustproof net is fixedly connected to the rear surface of the intelligent rectifier cabinet.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The start-stop control and grid connection device of this generator set, through the setting of support plate, electric push rod, connecting block and fixing frame, facilitates the exposure of the side and front of the electrical mounting bracket. This eliminates the impact of the inner wall of the intelligent rectifier cabinet on the replacement of the excitation regulator, improving the replacement efficiency of the excitation regulator. At the same time, the rotation and movement of the electrical mounting bracket facilitates the adjustment of the distance between the electrical mounting bracket and the outside of the intelligent rectifier cabinet, allowing the electrical mounting bracket to replace the excitation regulator at a suitable angle and position, further improving the replacement efficiency of the excitation regulator. At the same time, it can prevent electricians from excessively reaching into the interior of the intelligent rectifier cabinet when replacing the excitation regulator, improving the safety of the device. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic diagram of the start-stop control and grid connection device for a generator set according to the present invention;

[0021] Figure 2 This is a schematic diagram of the dustproof net of this utility model;

[0022] Figure 3 This is a schematic diagram of the second cooling fan of this utility model;

[0023] Figure 4 This is a schematic diagram of the electrical appliance mounting bracket of this utility model;

[0024] Figure 5 This is a schematic diagram of the turntable of this utility model.

[0025] Reference numerals: 1. Intelligent rectifier cabinet; 2. Incoming line cabinet; 3. Rectifier cabinet front door; 4. Rectifier cabinet side door; 5. Incoming line cabinet door; 6. Industrial panel PC; 7. Current transformer; 8. Button; 9. First cooling fan; 10. Dustproof net; 11. Second cooling fan; 12. Support plate; 13. Electric push rod; 14. Connecting block; 15. Fixing frame; 16. Patch panel; 17. Cable tray; 18. Limiting frame; 19. Turntable; 20. Connecting plate; 21. First threaded rod; 22. Handle; 23. Drive motor; 24. Second threaded rod; 25. Electrical mounting bracket fixing frame; 26. Electrical mounting bracket; 27. Threaded groove. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0028] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Please see Figure 1-5 This utility model provides a technical solution: a generator set start-stop control and grid connection device, including an intelligent rectifier cabinet 1 and an incoming line cabinet 2, an excitation regulator mounting assembly, which is set inside the intelligent rectifier cabinet 1, and a cabinet door limiting assembly, which is set inside the intelligent rectifier cabinet 1. The cabinet door limiting assembly includes a rectifier cabinet side door 4, which is hinged inside the intelligent rectifier cabinet 1. The front end of the rectifier cabinet side door 4 is hinged to a rectifier cabinet front door 3. Two support plates 12 are fixedly connected to the inner wall of the intelligent rectifier cabinet 1. The two support plates 12 are respectively located on the left inner wall and the front inner wall of the intelligent rectifier cabinet 1. An electric push rod 13 is fixedly connected inside the intelligent rectifier cabinet 1. A connecting block 14 is fixedly connected to the output end of the electric push rod 13. A fixing frame 15 is fixedly connected to the surface of the rectifier cabinet side door 4 near the support plate 12. The connecting block 14 is engaged with the fixing frame 15.

[0031] The excitation regulator mounting assembly includes a limit frame 18, which is fixedly connected inside the intelligent rectifier cabinet 1. A turntable 19 is rotatably connected inside the limit frame 18. A drive motor 23 is fixedly connected to the front end of the turntable 19. A second threaded rod 24 is fixedly connected to the output end of the drive motor 23. The second threaded rod 24 is rotatably connected to the turntable 19. An electrical mounting bracket 25 is threadedly fitted onto the surface of the second threaded rod 24. The electrical mounting bracket 25 is slidably connected to the inner wall of the turntable 19. An electrical mounting bracket 26 is fixedly connected to the upper end of the electrical mounting bracket 25. An excitation regulator, an AC disconnect switch, a DC disconnect switch, and an intelligent control unit are mounted on the surface of the electrical mounting bracket 26.

[0032] The excitation regulator mounting assembly also includes a connecting plate 20, which is fixedly connected to the turntable 19. The connecting plate 20 has a first threaded rod 21 threaded inside, and a handle 22 is fixedly connected to the upper end of the first threaded rod 21. The surface of the limit frame 18 has multiple threaded grooves 27, and the first threaded rod 21 is threadedly connected to the corresponding threaded groove 27.

[0033] The incoming line cabinet 2 is internally fixedly connected to a patch panel 16. The front end of the incoming line cabinet 2 is hinged to an incoming line cabinet door 5. The incoming line cabinet 2 is internally connected to the intelligent rectifier cabinet 1. A detachable cable tray 17 is fixedly installed on the rear side of the incoming line cabinet 2.

[0034] The top of the intelligent rectifier cabinet 1 is fixedly connected to a first cooling fan 9, the inner wall of the intelligent rectifier cabinet 1 is fixedly connected to three second cooling fans 11, and the rear surface of the intelligent rectifier cabinet 1 is fixedly connected to a dustproof net 10.

[0035] When using this device, first thread the cable through the bottom of the incoming cabinet 2 into the interior of the incoming cabinet 2, open the cabinet door 5 and fix the cable on the patch panel 16 for easy cable arrangement. The excitation regulator, AC switch, DC switch and intelligent control unit fixed on the surface of the electrical mounting bracket 26 are connected to the cable and connected to the industrial panel 6, current transformer 7 and button 8 on the surface of the front door 3 of the rectifier cabinet. In order to avoid the connection wires of the industrial panel 6, current transformer 7 and button 8 affecting the internal circuit, the cable passes through the rear of the electrical mounting bracket 26 and is fixed on the surface of the side door 4 and the front door 3 of the rectifier cabinet respectively.

[0036] During daily use, the power supply to the second cooling fan 11 is connected, and the second cooling fan 11 is started to draw air from outside the intelligent rectifier cabinet 1 into the interior of the intelligent rectifier cabinet 1 through the dust filter 10, thereby dissipating heat from the interior of the intelligent rectifier cabinet 1. The dust filter 10 filters dust from the air to prevent dust from entering the interior of the intelligent rectifier cabinet 1 and affecting the internal electrical components. At the same time, the power supply to the first cooling fan 9 is connected, and the first cooling fan 9 is started to extract air and heat from the interior of the intelligent rectifier cabinet 1, improving the heat dissipation efficiency and effect of the intelligent rectifier cabinet 1. Under normal circumstances, the cable tray 17 is installed on the top of the intelligent rectifier cabinet 1. However, the intelligent rectifier cabinet 1 needs to use the first cooling fan 9 to dissipate heat. Since the intelligent rectifier cabinet 1 is relatively tall, the top of the intelligent rectifier cabinet 1 is blocked by the cable tray 17, which affects the heat dissipation effect of the intelligent rectifier cabinet 1. Now, the cable tray 17 is set at the lower rear end of the incoming line cabinet 2 and the intelligent rectifier cabinet 1, which can avoid the cable tray 17 blocking the first cooling fan 9, making it easier for the first cooling fan 9 to dissipate the heat inside the intelligent rectifier cabinet 1 and further improve the heat dissipation effect. In addition, due to the setting of three second cooling fans 11, it is easy to directly blow on the electrical appliances on the surface of the electrical mounting bracket 26, which can effectively solve the problem of electrical appliance overheating.

[0037] Because the excitation regulator inside the intelligent rectifier cabinet 1 will age after long-term use and needs to be replaced within its service life, the two support plates 12 are set to support and strengthen the top of the intelligent rectifier cabinet 1, and at the same time limit the front door 3 and the side door 4 of the rectifier cabinet to prevent them from rotating excessively during the closing process, which would affect their use. When replacing the excitation regulator, first open the front door 3 of the rectifier cabinet to expose the electrical mounting bracket 26 inside the intelligent rectifier cabinet 1. Then, start the electric push rod 13 to drive the connecting block 14 down, so that the connecting block 14 separates from the fixed frame 15, releasing the locking between the connecting block 14 and the fixed frame 15, so that the side door 4 of the rectifier cabinet can be opened, and the side and front of the electrical mounting bracket 26 can be exposed. This avoids the side wall of the intelligent rectifier cabinet 1 from affecting the replacement of the excitation regulator, thus improving the replacement efficiency.

[0038] Before replacing the excitation regulator on the surface of the electrical mounting bracket 26, first manually turn the handle 22 to rotate the first threaded rod 21, causing it to move upwards and separate from the corresponding threaded groove 27. Rotating the turntable 19 causes the electrical mounting bracket fixing frame 25 and the electrical mounting bracket 26 to rotate, facilitating the adjustment of the angle of the electrical mounting bracket 26 and making it easier to replace the excitation regulator at a more suitable angle. Start the drive motor 23 to rotate the second threaded rod 24, which in turn causes the electrical mounting bracket fixing frame 25 to slide inside the turntable 19. Because the electrical mounting bracket fixing frame 25 is blocked by the inner wall of the turntable 19, the stability of the electrical mounting bracket fixing frame 25 during movement is improved. The electrical mounting bracket fixing frame 25 drives the electrical mounting bracket 26 to move, facilitating the adjustment of the distance between the electrical mounting bracket 26 and the outside of the intelligent rectifier cabinet 1, which in turn facilitates the replacement of the excitation regulator. This further improves the practicality of the device, increases the efficiency of excitation regulator replacement, and reduces the time wasted due to excitation regulator replacement.

[0039] The excitation regulator controls the excitation current according to voltage and current signals and regulation criteria to achieve automatic voltage stabilization and automatic reactive power adjustment. By optimizing system settings and wiring adjustments, it achieves the fastest and smoothest possible return of frequency difference and voltage difference to the set range, enabling rapid grid connection. It improves the steady-state and dynamic performance of the power system. With a precise and rigorous mathematical model, it ensures that the first occurrence of zero phase angle difference is captured during differential frequency grid connection (generator-to-system or line connection between two disconnected systems), enabling impact-free grid connection. During line-to-line frequency grid connection (loop connection), if the power angle and voltage difference on both sides of the connection point are less than the set value, the grid connection operation will be implemented immediately; otherwise, it will enter a waiting state and transmit remote signaling signals to the superior dispatcher. When the same frequency occurs during differential frequency grid connection of the motor, the excitation regulator will automatically issue an acceleration control command to eliminate the same frequency state, automatically adapt the secondary voltage of the TV to the phase voltage (57.7V) or line voltage (100V), and has a turning function to avoid reverse power grid connection of the generator.

[0040] An excitation regulator is a device that automatically adjusts the excitation current or voltage of a generator. It aims to maintain stable output voltage and improve the steady-state and dynamic performance of the power system. During generator startup, the excitation regulator adjusts the excitation current to ensure stable generator voltage build-up, prevent overexcitation, and protect generator safety. During shutdown, the excitation regulator executes an inverter shutdown process to ensure a smooth transition of the system to the shutdown state. At the same time, it generates a startup interlock signal to prevent misoperation. By precisely adjusting the excitation current or voltage, it ensures the safe and smooth startup and shutdown of the generator, while maintaining the stability of the power system.

[0041] Furthermore, the arrangement of the support plate 12, electric push rod 13, connecting block 14, and fixing frame 15 facilitates the exposure of the sides and front of the electrical mounting bracket 26, eliminating the impact of the inner wall of the intelligent rectifier cabinet 1 on the replacement of the excitation regulator and improving the replacement efficiency of the excitation regulator. At the same time, the rotation and movement of the electrical mounting bracket 26 facilitates the adjustment of the distance between the electrical mounting bracket 26 and the outside of the intelligent rectifier cabinet 1, allowing the electrical mounting bracket 26 to replace the excitation regulator at a suitable angle and position, further improving the replacement efficiency of the excitation regulator. It also prevents electricians from excessively extending into the interior of the intelligent rectifier cabinet 1 when replacing the excitation regulator, thus improving the safety of the device.

[0042] The first cooling fan 9 and the second cooling fan 11 facilitate heat dissipation inside the intelligent rectifier cabinet 1. The dust filter 10 filters dust from the air to prevent dust from entering the intelligent rectifier cabinet 1 and affecting the internal electrical appliances. The three second cooling fans 11 allow direct airflow onto the electrical appliances on the surface of the electrical mounting bracket 26, effectively solving the problem of heat generation and improving heat dissipation efficiency.

[0043] Working principle: When using this device, first pass the cable through the bottom of the incoming cabinet 2 into the interior of the incoming cabinet 2, open the cabinet door 5 and fix the cable on the patch panel 16 for easy cable arrangement. The excitation regulator, AC switch, DC switch and intelligent control unit fixed on the surface of the electrical mounting bracket 26 are connected to the cable and connected to the industrial panel 6, current transformer 7 and button 8 on the surface of the front door 3 of the rectifier cabinet. In order to avoid the connection wires of the industrial panel 6, current transformer 7 and button 8 affecting the internal circuit, the cable passes through the rear of the electrical mounting bracket 26 and is fixed on the surface of the side door 4 and the front door 3 of the rectifier cabinet respectively.

[0044] During daily use, the power supply to the second cooling fan 11 is connected, and the second cooling fan 11 is started to draw air from outside the intelligent rectifier cabinet 1 into the interior of the intelligent rectifier cabinet 1 through the dust filter 10, thereby dissipating heat from the interior of the intelligent rectifier cabinet 1. The dust filter 10 filters dust from the air to prevent dust from entering the interior of the intelligent rectifier cabinet 1 and affecting the internal electrical components. At the same time, the power supply to the first cooling fan 9 is connected, and the first cooling fan 9 is started to extract air and heat from the interior of the intelligent rectifier cabinet 1, improving the heat dissipation efficiency and effect of the intelligent rectifier cabinet 1. Under normal circumstances, the cable tray 17 is installed on the top of the intelligent rectifier cabinet 1. However, the intelligent rectifier cabinet 1 needs to use the first cooling fan 9 to dissipate heat. Since the intelligent rectifier cabinet 1 is relatively tall, the top of the intelligent rectifier cabinet 1 is blocked by the cable tray 17, which affects the heat dissipation effect of the intelligent rectifier cabinet 1. Now, the cable tray 17 is set at the lower rear end of the incoming line cabinet 2 and the intelligent rectifier cabinet 1, which can avoid the cable tray 17 blocking the first cooling fan 9, making it easier for the first cooling fan 9 to dissipate the heat inside the intelligent rectifier cabinet 1 and further improve the heat dissipation effect. In addition, due to the setting of three second cooling fans 11, it is easy to directly blow on the electrical appliances on the surface of the electrical mounting bracket 26, which can effectively solve the problem of electrical appliance overheating.

[0045] Because the excitation regulator inside the intelligent rectifier cabinet 1 will age after long-term use and needs to be replaced within its service life, the two support plates 12 are set to support and strengthen the top of the intelligent rectifier cabinet 1, and at the same time limit the front door 3 and the side door 4 of the rectifier cabinet to prevent them from rotating excessively during the closing process, which would affect their use. When replacing the excitation regulator, first open the front door 3 of the rectifier cabinet to expose the electrical mounting bracket 26 inside the intelligent rectifier cabinet 1. Then, start the electric push rod 13 to drive the connecting block 14 down, so that the connecting block 14 separates from the fixed frame 15, releasing the locking between the connecting block 14 and the fixed frame 15, so that the side door 4 of the rectifier cabinet can be opened, and the side and front of the electrical mounting bracket 26 can be exposed. This avoids the side wall of the intelligent rectifier cabinet 1 from affecting the replacement of the excitation regulator, thus improving the replacement efficiency.

[0046] Before replacing the excitation regulator on the surface of the electrical mounting bracket 26, first manually turn the handle 22 to rotate the first threaded rod 21, causing it to move upwards and separate from the corresponding threaded groove 27. Rotating the turntable 19 causes the electrical mounting bracket fixing frame 25 and the electrical mounting bracket 26 to rotate, facilitating the adjustment of the angle of the electrical mounting bracket 26 and making it easier to replace the excitation regulator at a more suitable angle. Start the drive motor 23 to rotate the second threaded rod 24, which in turn causes the electrical mounting bracket fixing frame 25 to slide inside the turntable 19. Because the electrical mounting bracket fixing frame 25 is blocked by the inner wall of the turntable 19, the stability of the electrical mounting bracket fixing frame 25 during movement is improved. The electrical mounting bracket fixing frame 25 drives the electrical mounting bracket 26 to move, facilitating the adjustment of the distance between the electrical mounting bracket 26 and the outside of the intelligent rectifier cabinet 1, which in turn facilitates the replacement of the excitation regulator. This further improves the practicality of the device, increases the efficiency of excitation regulator replacement, and reduces the time wasted due to excitation regulator replacement.

[0047] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A start-stop control and grid-connection device for a genset, characterized by: Intelligent rectifier cabinet (1) and incoming line cabinet (2) are included. The excitation regulator mounting assembly is arranged in the interior of the intelligent rectifier cabinet (1). The cabinet door limiting assembly is arranged in the interior of the intelligent rectifier cabinet (1), and the cabinet door limiting assembly comprises a rectifier cabinet side door (4) hinged in the interior of the intelligent rectifier cabinet (1), and a rectifier cabinet front door (3) hinged to the front end of the rectifier cabinet side door (4). The interior of the intelligent rectifier cabinet (1) is fixedly connected with an electric push rod (13), and the output end of the electric push rod (13) is fixedly connected with a connecting block (14).

2. The start-stop control and grid-connection device of a generator set according to claim 1, characterized in that: The excitation regulator mounting assembly comprises a limiting frame (18) fixedly connected in the interior of the intelligent rectifier cabinet (1), and a rotating disc (19) rotatably connected in the interior of the limiting frame (18). The front end of the rotating disc (19) is fixedly connected with a driving motor (23), the output end of the driving motor (23) is fixedly connected with a second threaded rod (24) rotatably connected with the rotating disc (19), and the surface of the second threaded rod (24) is threadedly sleeved with an electric appliance mounting frame fixing frame (25) slidably connected with the inner wall of the rotating disc (19). The upper end of the electric appliance mounting frame fixing frame (25) is fixedly connected with an electric appliance mounting frame (26), and the surface of the electric appliance mounting frame (26) is mounted with an excitation regulator, an alternating current knife switch, a direct current knife switch and an intelligent control unit.

3. The start-stop control and grid-connection device of a generator set according to claim 2, characterized in that: The excitation regulator mounting assembly further comprises a connecting plate (20) fixedly connected on the rotating disc (19), and a first threaded rod (21) threadedly connected in the interior of the connecting plate (20). The surface of the limiting frame (18) is provided with a plurality of threaded grooves (27), and the first threaded rod (21) is threadedly connected with the corresponding threaded groove (27).

4. The start-stop control and grid-connection device of a generator set according to claim 1, characterized in that: The interior of the incoming line cabinet (2) is fixedly connected with a wiring frame (16), the front end of the incoming line cabinet (2) is hinged with an incoming line cabinet door (5), and the interior of the incoming line cabinet (2) is in communication with the interior of the intelligent rectifier cabinet (1).

5. The start-stop control and grid-connection device of a generator set according to claim 1, characterized in that: The rear side of the incoming line cabinet (2) is fixedly mounted with a detachable cable bridge (17).

6. The start-stop control and grid-connection device of a generator set according to claim 1, characterized in that: The top of the intelligent rectifier cabinet (1) is fixedly connected with a first heat dissipation fan (9), the inner wall of the intelligent rectifier cabinet (1) is fixedly connected with three second heat dissipation fans (11), and the rear surface of the intelligent rectifier cabinet (1) is fixedly connected with a dust screen (10).

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