采用时域介电谱法确定变压器油纸绝缘等效电路参数

Equivalent Circuit Parameter of Transformer Oil-Paper Insulation Identified by Time Domain Dielectric Spectrum Method

目前在求解变压器油纸绝缘等效电路模型参数时,存在模型中弛豫项不确定、电路参数计算不唯一、工作量大等问题。介绍了变压器油纸绝缘等效电路的扩展德拜模型,提出了在弛豫项数不确定情况下利用时域介电谱法来求解变压器油纸绝缘等效电路参数,并通过仿真验证了该方法的准确性和可行性。

In finding the solution of equivalent circuit parameter for transformer oil-paper insulation, there are existing some problems, such as uncertain relaxation term, no unique circuit parameter calculation, a great amount of work. The expanding Dehye model of equivalent circuit parameter for transformer oil-paper insulation is introduced. Using the time domain dielectric spectrum method to solve equivalent circuit parameter for transformer oil-paper insulation under relaxation, term is uncertain and put it forward. The method proves the accuracy and feasibility of the method by the simulation.