Characteristics and Loss Measurement Study of Electrical Materials for Transformers under Mixed Excitation
The increasing complexity of power grid architecture and the increase of power electronic equipment,especially the development of DC transmission system,make the excitation condition of power equipment change from a single component to the mixed excitation of fundamental,harmonic and DC components.While the parameters provided in the selection manual of electrical materials are measured under standard working conditions,under mixed excitation,the electrical parameters of the materials are changed,and the loss measurement method in electrical materials is changed accordingly.A mirror compensation measurement scheme is designed to accurately measure the loss data in copper plates and silicon steel laminates under mixed excitation conditions,which provides a data reference for simulation modelling and solving.
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