The Selection Study on the Main Transformer Fiber Optic Winding Temperature Testing

With the transformer is developing to the super-large capacity, UHV, intelligent level. The direct measurement method of the transformer winding temperature, which use the fiber optic, is gradually becoming the mainstream way, which can ensure the safety operation of the transformer. This paper compared the principle, the reliability, operating scope and the fiber optic testing of the GaAs and FOT methods, provided the selecting method for the different capacities and voltage levels of the main transformer, and will provide some references to the development and application of the direct measurement method of the Transformer Winding Temperature.