The cooling and heat dissipation system of a box type substation is a key component of its stable operation. Its design is complex and sophisticated, aiming to ensure that the equipment will not overheat when running at high load.
Natural air cooling is one of the most common heat dissipation methods for box type substations. It uses the principle of air convection to discharge internal heat through the heat dissipation holes and vents of the box. The heat dissipation holes are usually distributed in the main positions of the box in the style of shutters to effectively dissipate heat. This method does not require additional energy consumption and is suitable for scenes with low ambient temperature or low heat dissipation requirements. However, in high temperature environments, the effect of natural air cooling may be limited.
To improve heat dissipation efficiency, some box type substations use a forced air cooling mechanism. This mechanism increases the air flow speed through a built-in fan to accelerate heat dissipation. The start and stop of the fan is usually controlled by the temperature control system. When the upper oil temperature of the transformer exceeds the set value, the fan is started to cool down; when the temperature drops below a certain value, the fan automatically stops working to avoid power waste. The forced air cooling mechanism performs better in high temperature environments and ensures the stable operation of the equipment.
Liquid cooling is an efficient heat dissipation method that has been gradually applied to box type substations in recent years. It removes heat through the circulation of coolant, and the heat dissipation effect is more significant. The liquid cooling system usually includes components such as a water pump, a water tank, and a cooling pipe. The water pump transports the coolant in the water tank to a specific pipe to exchange heat with the air to achieve a rapid cooling effect. The liquid cooling mechanism has the advantages of high heat dissipation efficiency and low noise, and is suitable for scenes with extremely high heat dissipation requirements.
In terms of heat dissipation design, the box type substation also adopts an intelligent heat dissipation management system. The system can automatically adjust the heat dissipation strategy according to the ambient temperature and equipment load to ensure that the equipment is always at a suitable working temperature. The intelligent heat dissipation management system monitors the equipment temperature and load in real time through integrated sensors and controllers, and automatically adjusts according to the preset heat dissipation strategy. This intelligent heat dissipation management method not only improves the heat dissipation efficiency, but also reduces energy consumption and maintenance costs.
The choice of box material also has an important influence on heat dissipation performance. The use of aluminum alloy or stainless steel materials with good thermal conductivity helps to quickly transfer heat. These materials not only have good heat dissipation performance, but also have the advantages of corrosion resistance, high strength, and light weight, and are suitable for various harsh environments.
In order to improve the efficiency and quality of heat dissipation, some box type substations adopt a dual independent channel natural air cooling structure. This structure contains two independent ventilation ducts, which can enhance the heat dissipation effect and work stably under relatively harsh conditions without excessive maintenance workload. The dual independent channel design makes the air flow smoother and improves the heat dissipation efficiency.
In high temperature environments, in order to deal with the overheating of the equipment, some temporary installation measures can be taken. For example, adding fans, replacing thermostats, etc., to alleviate overheating and reduce the occurrence of safety hazards. These temporary measures can provide additional heat dissipation support in emergency situations to ensure the stable operation of the equipment.
The cooling and heat dissipation system design of the box type substation comprehensively considers natural air cooling, forced air cooling, liquid cooling, intelligent heat dissipation management, box material selection, dual independent channel natural air cooling structure and temporary installation measures. These design measures together ensure that the box type substation can maintain stable heat dissipation performance in various environments, thereby extending the service life of the equipment and improving operating efficiency.
