As a large and complex energy conversion and transmission network, the core mission of the power system is to efficiently and safely transmit the electricity produced by power plants to the user end. In this system, oil-immersed transformers occupy a pivotal position with their unique structural and performance advantages. It can not only reasonably realize voltage conversion, ensure the safe isolation of electrical systems, and ensure efficient transmission and distribution of electric energy, but also play a key role in maintaining the stable operation of the entire power system.
Electrical Isolation
Oil-immersed transformers have excellent electrical isolation performance, which can separate circuits of different voltage levels and different electrical characteristics from each other to prevent the spread and interference of electrical faults. In the power system, the high-voltage side and the low-voltage side are electrically isolated with the help of transformers. Even if a fault occurs on the high-voltage side, it will not directly affect the safety of equipment and personnel on the low-voltage side. In addition, the insulating oil and insulation materials inside the transformer can effectively prevent the occurrence of electrical short circuits and ground faults. The insulating oil has both good insulation and heat dissipation properties. It can fill the gaps inside the transformer to prevent abnormal current flow, and it can also dissipate the heat generated during the operation of the transformer to ensure the normal operation of the transformer. This electrical isolation and insulation protection mechanism has built a reliable line of defense for the safe operation of the power system.
Voltage Conversion
In the power system, the generation, transmission and consumption of electric energy are usually at different voltage levels. The voltage output by power plants is generally low. If long-distance transmission is carried out directly, it will cause great power loss. The oil-immersed transformer can accurately achieve voltage rise and fall based on the principle of electromagnetic induction. In the step-up substation, it converts the low-voltage electric energy generated by the generator into high-voltage electric energy, which can reduce energy loss during the transmission process and achieve efficient long-distance transmission of electric energy. In the step-down substation, the transformer converts the high-voltage electric energy into a low voltage suitable for users, such as 220V, 380V, etc., to ensure the normal operation of various electrical equipment. This voltage conversion function allows the power system to flexibly adapt to the voltage requirements of different links and achieve efficient distribution and utilization of electric energy.
Stable System Operation
The stable operation of the power system is the foundation for ensuring the normal development of social production and life. Oil-immersed transformers play an extremely critical role in maintaining system stability. It has a certain overload capacity. When the system experiences a short-term load fluctuation, the transformer can withstand a certain degree of overload without immediate damage, which ensures a continuous supply of electricity. At the same time, the transformer can also adjust the voltage. When the grid voltage fluctuates due to various factors, the transformer can use its own adjustment mechanism to keep the output voltage relatively stable, avoiding damage to electrical equipment due to excessively high or low voltage. Furthermore, when a fault occurs in the power system, the transformer can cooperate with other protection devices to quickly isolate the fault area, prevent the fault from spreading, and ensure the safe operation of the entire power system.
Robust Performance in Harsh Environments
Oil-immersed transformers are usually installed outdoors or in various complex industrial environments, which requires them to have good environmental adaptability and long-term reliability. Its shell and protective structure can effectively resist the invasion of natural environments such as wind, rain, lightning, dust, etc., ensuring that the transformer can work normally under various harsh conditions. Moreover, the transformer is carefully designed and manufactured. It uses high-quality materials and advanced technology and has a long service life and low failure rate. Regular maintenance and overhaul can promptly detect and deal with potential problems, ensure the long-term stable operation of the transformer, and provide continuous and reliable power support for the power system.
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