Bus ventilation system

Abstract

The utility model relates to a bus ventilation system. The system comprises a common enclosure bus, a plurality of air quality sensors and a ventilation device, the ventilation device is at least connected with the box body at one end of the common-box enclosed bus, and the box body at the other end of the common-box enclosed bus is provided with an air outlet; the plurality of air quality sensors are uniformly fixed on the inner side of the box body of the common-box enclosed bus at intervals, and each air quality sensor is connected with the ventilation device; the air quality sensor is used for collecting air quality information in the common enclosure bus, and the ventilation device is used for outputting dry and greasy-dirt-free compressed gas to the common enclosure bus according to the air quality information.

Description

Technical Field

[0001] This disclosure relates to the field of dehumidification device technology, and more specifically, to a busbar ventilation system. Background Technology

[0002] Power plants typically use enclosed busbars with shared enclosures for power transmission. However, due to structural limitations, the enclosures of these busbars cannot be completely sealed, thus failing to effectively isolate external dust. Furthermore, when humid air enters the enclosure, condensation occurs, leading to moisture absorption of the busbar's insulation components and a decrease in its insulation resistance. Additionally, when the busbar is shut down, its temperature gradually decreases until it reaches ambient temperature. During this process, condensation easily forms on the metal casing and supporting insulators of the enclosed busbar, causing moisture absorption of the insulation components and a further decrease in insulation resistance. For example, in rainy weather, the insulation resistance can typically drop to tens or even several megohms, severely impacting unit restart and normal operation.

[0003] Existing technologies typically employ methods such as timed cleaning, spraying anti-flashover coatings, and installing constant-temperature power tracing cables to improve the cleanliness and dryness of the air inside the enclosed busbar enclosure. However, these methods are difficult to implement and maintain. For example, spraying anti-flashover coatings is challenging, and if dirt accumulates on the surface of the insulators inside the enclosure for an extended period after spraying, the hydrophobicity of the coating will decrease, leading to a reduction in the insulation strength of the busbar. Installing constant-temperature power tracing cables may result in a significant temperature difference between the inside and outside of the busbar enclosure. Unsaturated water vapor in the humid air inside the enclosure will condense on the enclosure walls, and at the vertically distributed ends of the busbar, the condensate can easily drip onto the insulators, potentially causing flashover discharge. Utility Model Content

[0004] To achieve the above objectives, this disclosure provides a busbar ventilation system, the system including a common enclosure busbar, multiple air quality sensors, and ventilation devices;

[0005] The ventilation device is connected to at least one end of the enclosure of the common enclosure busbar, and the enclosure at the other end of the common enclosure busbar is provided with an air outlet.

[0006] The plurality of air quality sensors are fixed at even intervals to each other inside the enclosure of the common enclosed busbar, and each air quality sensor is connected to the ventilation device.

[0007] The air quality sensor is used to collect air quality information inside the common enclosure busbar, and the ventilation device is used to output dry and oil-free compressed gas to the common enclosure busbar according to the air quality information.

[0008] Optionally, the common enclosure busbar includes multiple air inlets, each of which is connected to the ventilation device via an air supply duct, and any two adjacent air inlets are arranged at even intervals.

[0009] Optionally, the air supply duct corresponding to each of the air inlets is connected together and then connected to the output end of the ventilation device.

[0010] Optionally, each air inlet and air outlet of the common enclosure busbar is equipped with a solenoid valve, and each solenoid valve is communicatively connected to the ventilation device.

[0011] Optionally, the ventilation device includes a receiving module, a main control module, and a purging module;

[0012] The receiving module is communicatively connected to each of the air quality sensors, electrically connected to the main control module, and connected to the purging module. The main control module is used to control the start and stop of the purging module and the solenoid valve.

[0013] Optionally, the purging module includes an air inlet duct, an air compressor, an air tank, a refrigerated dryer, a filter, and a heater;

[0014] The input end of the air compressor is connected to the air inlet pipe, the output end of the air compressor is connected to the input end of the air tank, the output end of the air tank is connected to the input end of the refrigerated dryer, the output end of the refrigerated dryer is connected to the input end of the filter, the output end of the filter is connected to the input end of the heater, and the output end of the heater is connected to the common enclosure busbar.

[0015] The air compressor is used to convert outside air into compressed gas, the air tank is used to store the compressed gas output by the air compressor, the refrigerated dryer is used to reduce the water content of the compressed gas, the filter is used to remove oil, dust and water from the compressed gas, and the heater is used to adjust the temperature of the compressed gas.

[0016] Optionally, the plurality of air quality sensors include a first air quality sensor and a second air quality sensor, wherein the first air quality sensor is fixed at the air outlet of the common enclosure busbar, and the second air quality sensor is fixed inside the air supply duct connecting the ventilation device and the common enclosure busbar.

[0017] Optionally, the ventilation device further includes an alarm module connected to the main control module. The alarm module is used to issue an alarm when the second air quality sensor detects that the compressed gas output by the ventilation device does not meet a preset standard.

[0018] Optionally, the common-enclosed busbar includes a transformer and a high-voltage switch;

[0019] The transformer is connected to the input terminal of the inner conductor of the common enclosure busbar, and the high-voltage switch is connected to the output terminal of the inner conductor of the common enclosure busbar.

[0020] The ventilation device is connected to the enclosure of the common-enclosed busbar near the high-voltage switch, and the air outlet is located on the enclosure of the common-enclosed busbar near the transformer.

[0021] Optionally, the system further includes a human-machine interface device (HMI), which is communicatively connected to the ventilation device. The HMI is used to manually control the start and stop of the ventilation device, and to display the start and stop status of the ventilation device and the air quality information within the common enclosure busbar.

[0022] This structure effectively prevents power equipment failures caused by environmental factors, improving the reliability and safety of the power system. Simultaneously, the system's automation and intelligence reduce the need for manual monitoring, increasing operational efficiency.

[0023] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of a busbar ventilation system according to an exemplary embodiment.

[0026] Figure 2 This is a schematic diagram of the structure of a busbar ventilation system according to an exemplary embodiment.

[0027] Figure 3 This is a schematic diagram of the structure of a ventilation device according to an exemplary embodiment.

[0028] Explanation of reference numerals in the attached figures

[0029] Busbar ventilation system 10, common enclosure busbar 100, air quality sensor 200, ventilation device 300, receiving module 301, main control module 302, purging module 303, alarm module 304, air outlet 101, air supply duct 102, transformer 103, high voltage switch 104, air inlet duct 3001, air compressor 3002, air tank 3003, refrigerated dryer 3004, filter 3005, heater 3006, solenoid valve 401, human-machine control device 500. Detailed Implementation

[0030] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0031] This disclosure provides a busbar ventilation system, see [link to relevant documentation] Figure 1 As shown, the bus ventilation system 10 includes a common enclosure bus 100, multiple air quality sensors 200, and a ventilation device 300.

[0032] The ventilation device 300 is connected to at least one end of the enclosure of the common enclosure busbar 100, and the other end of the enclosure of the common enclosure busbar 100 is provided with an air outlet 101.

[0033] The plurality of air quality sensors 200 are fixed at equal intervals to each other inside the enclosure of the common enclosure busbar 100, and each of the air quality sensors 200 is connected to the ventilation device 300.

[0034] In one embodiment, the air quality sensor 200 can transmit the collected air quality information to the ventilation device 300 via wireless or wired means. The wired transmission method can be Modbus, and the wireless transmission method can be Zigbee.

[0035] The air quality sensor 200 is used to collect air quality information inside the common enclosure busbar 100, and the ventilation device 300 is used to output dry and oil-free compressed gas to the common enclosure busbar 100 according to the air quality information.

[0036] It is worth noting that the common enclosure busbar 100, as a power transmission device in a power plant, typically includes a busbar (conductor) for transmitting current, insulating material for isolating the conductor, a metal casing (box) for providing mechanical protection and preventing electromagnetic interference, bolts for fixing the conductor and insulating material, and connectors for connecting the busbar and bolts.

[0037] In one embodiment, multiple air quality sensors 200 are evenly distributed and fixed inside the enclosure of the common-enclosed busbar 100 to detect air quality information of the air flowing inside the enclosure. The air quality information includes one or more of the following: air temperature, humidity, oil content, particulate matter content, and pressure. Each air quality sensor 200 is wirelessly connected to a ventilation device 300, enabling the ventilation device 300 to monitor the air conditions inside the common-enclosed busbar in real time and subsequently activate or deactivate it. For example, based on the received air quality information, the ventilation device 300 may determine whether the air temperature inside the common-enclosed busbar exceeds a preset temperature threshold; if so, it will activate the ventilation device 300. Alternatively, it may determine whether the humidity inside the common-enclosed busbar exceeds a preset humidity threshold; if so, it will activate the ventilation device 300. Or, it may determine whether the oil content inside the common-enclosed busbar exceeds a preset oil content threshold; if so, it will activate the ventilation device 300. After the ventilation device 300 is started, it outputs dry, oil-free, and dust-free compressed gas to the common enclosure busbar 100 to replace the humid gas in the common enclosure busbar 100. The original humid gas is discharged from the outlet 400.

[0038] This structure effectively prevents power equipment failures caused by environmental factors, improving the reliability and safety of the power system. Simultaneously, the system's automation and intelligence reduce the need for manual monitoring, increasing operational efficiency.

[0039] Optionally, the common enclosure busbar 100 includes multiple air inlets, each of which is connected to the ventilation device 300 via an air supply duct 102, and any two adjacent air inlets are arranged at even intervals.

[0040] It is worth noting that multiple air inlets are evenly arranged along the length of the common enclosed busbar 100. This ensures that compressed air is evenly distributed along the entire length of the busbar, thereby achieving uniform regulation of the internal environment. Each air inlet is connected to the ventilation device 300 via an independent air supply duct. The design of the air supply duct should take into account the uniform distribution of airflow and minimize pressure loss.

[0041] In one embodiment, see Figure 2 As shown, a solenoid valve 401 can be installed on the air supply duct 102 to adjust the air volume of each air inlet. This allows for adjustment of the air volume in different areas to meet varying cooling or drying requirements. Combined with the air quality sensor 200, the air quality near each air inlet is monitored in real time, and the operating parameters of the ventilation device 300, such as the output pressure of the air compressor and the operating status of the refrigerated dryer, are adjusted based on the monitoring results.

[0042] Through the multiple air inlets and outlets on the common enclosure busbar 100, a weak local positive pressure can be formed inside the common enclosure busbar 100, thus forming an "air seal". Exhaust is released through the leakage gaps on the common enclosure busbar 100, thereby preventing external dust, impurities, oil, and humid air from entering the enclosure, ensuring a dry and clean operating environment inside the common enclosure busbar 100.

[0043] Optionally, the air supply duct 102 corresponding to each of the air inlets is connected together and then connected to the output end of the ventilation device 300.

[0044] In one embodiment, see Figure 2 As shown, the common enclosure busbar 100 includes air inlet A, air inlet B, air inlet C, and air inlet D. The ventilation ducts 202 corresponding to air inlets A, B, C, and D are connected together and then connected to the output end of the ventilation device 300. The output end of the ventilation device 300 and each air inlet are equipped with a solenoid valve 401. With this arrangement, after the ventilation device 300 is started, at least one solenoid valve 401 corresponding to the air inlet can be opened to allow ventilation of the common enclosure busbar 100 from different air inlets. By opening all the solenoid valves 401 corresponding to the air inlets, the uniformity of temperature and humidity regulation inside the common enclosure busbar 100 can be improved, thereby increasing the efficiency of dehumidification and ventilation of the busbar.

[0045] In another embodiment, the air inlets of the common enclosure busbar 100 can be partially connected to the ventilation device 300, while the remaining air inlets are interconnected. For example, air inlet C is connected to the ventilation device 300, and air inlets A, B, and D are interconnected. In this way, after the ventilation device 300 is activated, a circulating airflow can be formed within the common enclosure busbar 100, optimizing the airflow distribution, reducing the dead zones of the ventilation device 300, and effectively preventing external humid air, dust, and oil from entering the common enclosure busbar 100.

[0046] Optionally, each air inlet and air outlet 101 of the common enclosure busbar 100 is provided with a solenoid valve 401, and each solenoid valve 401 is communicatively connected to the ventilation device 300.

[0047] The solenoid valve at the air inlet of the common enclosure busbar 100 is also called the air inlet valve. The air inlet valve opens or closes according to the operating status of the ventilation device 300. That is, when the ventilation device 300 is turned on, the air inlet valve is opened to displace the humid air inside the enclosure. When the ventilation device 300 is turned off, the air inlet valve is closed. This ensures that the common enclosure busbar 100 is not affected by the air in the air supply duct, thus ensuring the airtightness of the common enclosure busbar 100.

[0048] The solenoid valve at the air outlet of the common enclosure busbar 100 is also called the exhaust valve. This exhaust valve opens or closes according to the operating status of the ventilation device 300. That is, when the ventilation device 300 is turned on, the exhaust valve is opened to displace the humid air inside the enclosure; when the ventilation device 300 is turned off, the exhaust valve is closed. In addition, the exhaust valve can also open or close according to the air pressure inside the common enclosure busbar 100. It is worth noting that the enclosure of the common enclosure busbar 100 is composed of four metal plates. There may be leakage gaps at the joints of any two adjacent metal plates. Therefore, when the air pressure inside the enclosure is too low, the exhaust valve can be kept closed after the ventilation device is turned on. In this way, the air entering the common enclosure busbar 100 from the ventilation device 300 will be discharged from the aforementioned leakage gaps. In this way, not only can the air pressure in the common enclosure busbar be increased, but also external dust, impurities, oil, and humid air can be prevented from entering the enclosure of the common enclosure busbar.

[0049] In one embodiment, multiple air quality sensors 200 are evenly arranged on the inner side of the box between the exhaust valve and the intake valve. Each air quality sensor 200 collects the air pressure inside the box in real time. When the ventilation device 300 receives a reading from any air quality sensor 200 that the air pressure exceeds a preset air pressure threshold, the exhaust valve is opened.

[0050] Optionally, the ventilation device 300 includes a receiving module 301, a main control module 302, and a purging module 303.

[0051] The receiving module 301 is communicatively connected to each of the air quality sensors 200, the receiving module 301 is electrically connected to the main control module 302, the main control module 302 is connected to the purging module 303, and the main control module 302 is used to control the start and stop of the purging module 303 and the solenoid valve.

[0052] The receiving module 301 and the main control module 302 can also be installed in other devices besides the ventilation device 300. The receiving module 301 can also be a wireless communication module inside the active module 302. The main control module 302 can be a PLC (Programmable Logic Controller), a PCB (Printed Circuit Board) control board integrated with a microcontroller or air pressure control chip, or a combination of multiple control modules. The main control module 302 mainly completes the safety protection and operation status detection of the ventilation system 10. It receives the air quality information returned by the air quality sensor 200 through the receiving module 301. It has rich DI, DO and communication interfaces, which facilitates data exchange with other peripheral modules and interlocking and locking logic.

[0053] In one embodiment, the receiving module 301 is a wireless communication module. The air quality sensor 200 can transmit data to the receiving module 301 via Zigbee networking technology, and the receiving module 301 can then transmit the data to the main control module 302 via fieldbus or other communication methods.

[0054] Optionally, see Figure 3 As shown, the purging module 303 includes an air inlet duct 3001, an air compressor 3002, an air tank 3003, a refrigerated dryer 3004, a filter 3005, and a heater 3006.

[0055] The input end of the air compressor 3002 is connected to the air inlet duct 3001, the output end of the air compressor 3002 is connected to the input end of the air storage tank 3003, the output end of the air storage tank 3003 is connected to the input end of the refrigerated dryer 3004, the output end of the refrigerated dryer 3004 is connected to the input end of the filter 3005, the output end of the filter 3005 is connected to the input end of the heater 3006, and the output end of the heater 3006 is connected to the common enclosure busbar 100.

[0056] The air compressor 3002 is used to convert external air into compressed gas, the air tank 3003 is used to store the compressed gas output by the air compressor 3002, the refrigerated dryer 3004 is used to reduce the water content of the compressed gas, the filter 3005 is used to remove oil, dust and water from the compressed gas, and the heater 3006 is used to adjust the temperature of the compressed gas.

[0057] Among them, air compressor 3002 can be an oil-free air compressor, and the compressed gas provided by air compressor 3002 can also be replaced with pre-compressed plant air source.

[0058] In one embodiment, when the purging module 303 is started, the air compressor 3002 first introduces and compresses external air through the air inlet pipe 3001, and temporarily stores the compressed gas in the air storage tank 3003 to balance the pressure fluctuations of the air compressor output and ensure the stable operation of subsequent equipment. Then, the air storage tank 3003 outputs the compressed gas to the refrigerated dryer 3004, which lowers the temperature of the compressed air, causing the water vapor in the compressed air to condense into liquid water and be discharged, thereby reducing the water content of the compressed air and outputting dry compressed air. Further, the filter 3005 filters the dry compressed air to remove oil, dust and water from the air. Finally, the heater heats the filtered compressed gas to adjust the temperature of the compressed gas and ensure that the temperature of the gas entering the common enclosure bus 100 is suitable, for example, keeping the temperature of the output compressed gas the same as the ambient temperature to prevent condensation caused by temperature difference.

[0059] There may be multiple filters 3005, each with a different level of filtration precision. For example, a primary filter is used to remove larger particles, while a secondary filter is used to remove smaller particles.

[0060] Optionally, the plurality of air quality sensors 200 includes a first air quality sensor and a second air quality sensor. The first air quality sensor is fixed at the air outlet of the common enclosure busbar 100, and the second air quality sensor is fixed inside the air supply duct 102 connecting the ventilation device 300 and the common enclosure busbar 100.

[0061] It is worth noting that the first air quality sensor is used to monitor the air quality of the air discharged after passing through the entire enclosed busbar 100. This helps determine whether the ventilation system 300 has effectively removed contaminants and moisture from the enclosed busbar 100. For example, an air quality sensor can be located inside the enclosed busbar 100.

[0062] The second air quality sensor is used to monitor the air quality entering the common enclosure busbar 100, ensuring that the supplied air meets the requirements for dryness and cleanliness.

[0063] Optionally, see Figure 3 As shown, the ventilation device 300 also includes an alarm module 304, which is connected to the main control module 302. The alarm module 304 is used to issue an alarm when the second air quality sensor 200 detects that the compressed gas output by the ventilation device 300 does not meet the preset standard.

[0064] The preset standards include at least one of the preset humidity standard, preset temperature standard, preset oil content standard, and preset impurity level standard.

[0065] In one embodiment, a first air quality sensor and a second air quality sensor continuously monitor the air quality at the air outlet of the enclosed busbar box 100 and in the air supply duct 102 of the ventilation device 300. The ventilation device 300 receives the air quality information collected by each air quality sensor 200 through a receiving module 301 and transmits it to the main control module 302. The main control module 302 analyzes the air quality information and determines whether the air quality meets the preset standard. If the second air quality sensor 200 detects that the compressed gas output by the ventilation device 300 does not meet the preset standard, such as excessive humidity... If the air quality deteriorates, dust content exceeds the standard, or oil is present, the alarm module 304 will be triggered. The alarm module 304 can issue warnings in various ways, including but not limited to sound, light, or automatic notification to the maintenance personnel's mobile devices. After the alarm occurs, the maintenance personnel should immediately check the ventilation system and air quality sensor to determine the cause of the problem and perform necessary maintenance or repair. In addition, once the alarm module 304 is triggered, the system can automatically adjust the operating parameters of the ventilation device 300, such as increasing the dehumidification intensity of the refrigerated dryer 3004 or adjusting the temperature of the heater 3006 to improve air quality.

[0066] With this configuration, the bus ventilation system 10 can not only ensure the air quality inside the enclosed bus, but also issue timely warnings when the air quality deteriorates, thereby taking corresponding measures to ensure the safe and reliable operation of the power system.

[0067] Optionally, the common enclosure busbar 100 includes a transformer 103 and a high-voltage switch 104.

[0068] The transformer is connected to the input terminal of the inner conductor of the common enclosure busbar 100, and the high-voltage switch is connected to the output terminal of the inner conductor of the common enclosure busbar 100.

[0069] The ventilation device 300 is connected to the enclosure of the common enclosure busbar 100 near the high-voltage switch, and the air outlet is located on the enclosure of the common enclosure busbar 100 near the transformer.

[0070] In one embodiment, the current in the common enclosure busbar 100 flows from the transformer to the high-voltage switch. During operation, the transformer generates a large amount of heat, causing the hot air inside the enclosure to rise naturally. The ventilation direction of the ventilation device 300 is from the enclosure on the high-voltage switch side to the enclosure on the transformer side, which is opposite to the direction of the current. This helps the hot air to flow and exhaust more effectively, thus improving the heat dissipation efficiency inside the enclosure. In addition, air is supplied from the high-voltage switch side to the transformer side, which can create a slight positive pressure on the transformer side, thereby preventing external pollutants from entering the transformer through leaks in the enclosure of the common enclosure busbar 100.

[0071] Optionally, the bus ventilation system 10 further includes a human-machine interface device 500, which is communicatively connected to the ventilation device 300. The human-machine interface device 500 is used to manually control the start and stop of the ventilation device 300, and to display the start and stop status of the ventilation device 300 and the air quality information inside the common enclosure bus 100.

[0072] In one embodiment, the human-machine control device 500 includes a display module that displays the gas quality information of the output gas of the ventilation device, the air quality information of each location in the common enclosure busbar 100 where an air quality sensor 200 is installed, and the opening and closing status of the ventilation device 300 and each solenoid valve.

[0073] For example, the human-machine interface device 500 is equipped with a display screen and input devices (such as buttons, touch screens, etc.) to display the start / stop status of the ventilation device 300 and the air quality information within the common enclosure busbar 100. Operators can manually start or stop the ventilation device 300 via the human-machine interface device 500 to adapt to different maintenance needs or emergencies. The human-machine interface device 500 can display data collected by the air quality sensor 200 in real time, including humidity, temperature, oil content, and particulate matter concentration. When the compressed gas output by the ventilation device 300 does not meet preset standards, the alarm module 304 will be triggered, and the human-machine interface device 500 will display the corresponding alarm information. The human-machine interface device 500 can display the operating status of the ventilation device 300, including the working status of the air compressor 3002, refrigerated dryer 3004, filter 3005, and heater 3006. Operators can adjust the operating parameters of the ventilation device 300 via the human-machine interface device 500, such as setting humidity thresholds and temperature ranges. The human-machine interface device 500 can record historical operating data and alarm events, facilitating data analysis and system maintenance by operators. Based on the system's operating time and status, the human-machine interface device 500 can prompt operators to perform regular maintenance, such as replacing filters and checking seals.

[0074] With the HMI 500, operators can manage the busbar ventilation system more intuitively and conveniently, ensuring efficient system operation and the safety of electrical equipment. The addition of this device not only improves the system's user-friendliness but also enhances its flexibility and reliability.

[0075] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0076] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0077] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A busbar ventilation system, characterized in that, The system includes a common enclosed busbar, multiple air quality sensors, and a ventilation device; The ventilation device is connected to at least one end of the enclosure of the common enclosure busbar, and the enclosure at the other end of the common enclosure busbar is provided with an air outlet. The plurality of air quality sensors are fixed at even intervals to each other inside the enclosure of the common enclosed busbar, and each air quality sensor is connected to the ventilation device. The air quality sensor is used to collect air quality information inside the common enclosure busbar, and the ventilation device is used to output dry and oil-free compressed gas to the common enclosure busbar according to the air quality information.

2. The system according to claim 1, characterized in that, The common enclosure busbar includes multiple air inlets, each of which is connected to the ventilation device via an air supply duct, and any two adjacent air inlets are arranged at even intervals.

3. The system according to claim 2, characterized in that, Each of the aforementioned air inlets has a corresponding air supply duct connected together to the output end of the ventilation device.

4. The system according to claim 2, characterized in that, Each air inlet and air outlet of the common enclosure busbar is equipped with a solenoid valve, and each solenoid valve is communicatively connected to the ventilation device.

5. The system according to claim 4, characterized in that, The ventilation device includes a receiving module, a main control module, and a purging module; The receiving module is communicatively connected to each of the air quality sensors, electrically connected to the main control module, and connected to the purging module. The main control module is used to control the start and stop of the purging module and the solenoid valve.

6. The system according to claim 5, characterized in that, The purging module includes an air inlet duct, an air compressor, an air tank, a refrigerated dryer, a filter, and a heater; The input end of the air compressor is connected to the air inlet pipe, the output end of the air compressor is connected to the input end of the air tank, the output end of the air tank is connected to the input end of the refrigerated dryer, the output end of the refrigerated dryer is connected to the input end of the filter, the output end of the filter is connected to the input end of the heater, and the output end of the heater is connected to the common enclosure busbar. The air compressor is used to convert outside air into compressed gas, the air tank is used to store the compressed gas output by the air compressor, the refrigerated dryer is used to reduce the water content of the compressed gas, the filter is used to remove oil, dust and water from the compressed gas, and the heater is used to adjust the temperature of the compressed gas.

7. The system according to claim 5, characterized in that, The plurality of air quality sensors include a first air quality sensor and a second air quality sensor. The first air quality sensor is fixed at the air outlet of the common enclosure busbar, and the second air quality sensor is fixed inside the air supply duct connecting the ventilation device and the common enclosure busbar.

8. The system according to claim 7, characterized in that, The ventilation device also includes an alarm module, which is connected to the main control module. The alarm module is used to issue an alarm when the second air quality sensor detects that the compressed gas output by the ventilation device does not meet the preset standard.

9. The system according to claim 1, characterized in that, The common-enclosed busbar includes a transformer and a high-voltage switch; The transformer is connected to the input terminal of the inner conductor of the common enclosure busbar, and the high-voltage switch is connected to the output terminal of the inner conductor of the common enclosure busbar. The ventilation device is connected to the enclosure of the common-enclosed busbar near the high-voltage switch, and the air outlet is located on the enclosure of the common-enclosed busbar near the transformer.

10. The system according to claim 1, characterized in that, The system also includes a human-machine interface device (HMI), which is communicatively connected to the ventilation device. The HMI is used to manually control the start and stop of the ventilation device, and to display the start and stop status of the ventilation device and the air quality information within the common enclosure busbar.

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