What are the temperature management methods for oil-immersed transformers?
Time：2024-12-28 Auther：ZTelec-www.ztelectransformer.com
Oil-immersed transformers are indispensable equipment in power systems. They achieve electrical insulation and heat dissipation by immersing in insulating transformer oil. Temperature management is essential to ensure the normal operation of oil-immersed transformers, because too high a temperature will accelerate the aging of the oil and reduce the insulation performance of the oil to increase the risk of transformer failure; while too low oil temperature may increase the viscosity of the oil and affect the heat dissipation performance of the transformer.
Temperature management method for oil-immersed transformers
Temperature protection device: Oil-immersed transformers are usually equipped with temperature protection devices, such as thermal relays and temperature detectors. When the transformer temperature exceeds the set upper limit, the temperature protection device will automatically disconnect the transformer power supply or trigger an alarm to avoid overheating hazards.
Oil medium circulation and cooling system: By setting up equipment such as oil pipelines and circulation pumps, the oil medium is circulated to keep the temperature inside the transformer evenly distributed and take away the generated heat. This method can effectively reduce the operating temperature of the transformer.
Energy-saving cooler: Energy-saving coolers improve cooling effects and reduce the operating temperature of transformers by using materials with high thermal conductivity and reasonable pipeline layout.
Temperature monitoring system: Temperature sensors are installed at key parts of the transformer to monitor the temperature inside the transformer in real time, detect abnormal conditions in time and take measures to adjust or repair them.
Ventilation system: The ventilation system of the transformer is reasonably designed to ensure good ventilation conditions around the transformer so that heat can be dissipated in time. In a closed or poorly ventilated environment, ventilation equipment should be added or other heat dissipation measures should be taken.
Avoid overload: By adjusting the load size of the transformer and control the heat it generates, the temperature can be adjusted . When the load is too large, you can appropriately reduce the number of connected loads or adjust the working mode of the load.
Regular maintenance and care: Regularly check and maintain the oil-immersed transformer, clean the dust and impurities inside, and ensure that the heat dissipation channel is unobstructed.
Ambient temperature: In a high temperature environment, the heat dissipation performance of the transformer will be affected, resulting in an increase in oil temperature. Therefore, additional cooling measures should be taken in high temperature seasons, such as increasing the investment in cooling equipment or adjusting the operation mode of the transformer. Transformers installed outdoors should take sun protection and shading measures to reduce the impact of solar radiation on oil temperature. For example, a sunshade can be built above the transformer or a reflector can be installed.
The temperature management of oil-immersed transformers involves many aspects. In order to ensure the normal operation of the transformer and extend its service life, operators should regularly monitor and maintain the temperature and take corresponding cooling measures according to the actual situation. At the same time, the daily management and maintenance of the transformer should be strengthened to timely discover and deal with potential problems and ensure the stability and reliability of the power system.
