Oil-Immersed Transformer, also known as oil-immersed transformer, is a type of transformer that uses oil as a cooling and insulating medium between the windings and the core. Oil-immersed transformers are commonly used in large power systems such as power plants, substations and power transmission grids, as well as in applications requiring high power conversion. The following is the working principle of oil-immersed transformer:
Working principle of oil-immersed transformer:
Cooling and insulating medium: Oil-immersed transformers use insulating oil with better insulation properties, such as mineral oil or silicone oil, to act as both cooling and insulating media. This oil has very good insulating properties, prevents electrical short circuits, and helps transfer the heat generated from the transformer to the outside environment.
Windings and Core: The windings and core of an oil-immersed transformer are soaked in oil to provide cooling and insulation. Oil can effectively transfer heat from the windings and core to the external environment, thereby maintaining the normal operating temperature of the transformer.
Oil circulation and cooling: Oil-immersed transformers usually have a cooling system in which oil circulates to transfer heat to the cooling medium through a heat exchanger. This helps maintain the transformer's operating temperature and ensures its proper operation.
Electrical Isolation: The oil in oil-immersed transformers is used not only as a cooling medium but also as an electrical isolation medium. The windings and core are immersed in oil, which provides electrical isolation and prevents electrical shorts between the windings and between the windings and the core.
Turns Ratio and Voltage Transformation: The working principle of oil-immersed transformers is similar to other transformer types. When an alternating current passes through the input winding, the generated magnetic field induces an electromotive force in the output winding, thereby achieving voltage conversion.
Protection and monitoring: Oil-immersed transformers are usually equipped with various protection devices and monitoring systems to ensure their normal operation and prevent overload, short circuit and other faults.
