为将电介质频率响应法推广应用于变压器绝缘状态评估，利用电介质频率响应法对110 kV及220 kV油浸式变压器高压-低压套管之间的油纸绝缘系统进行电介质响应测试；建立RC弛豫模型解析变压器油纸绝缘体系的绝缘性能，并通过最佳优化方法获得模型参数。结果表明：良好的绝缘体系使得各支路绝缘电阻增大，时间常数减小。
In order to apply dielectric frequency response method to assess the transformer insulation condition, we used dielectric frequency response method to measure the dielectric response of oil-paper insulation system between high voltage and low voltage bushings of 110 kV and 220 kV oil-immersed transformers. A RC relaxation model was established to analyze the insulating properties of the transformer oil-paper system, and the model parameters were obtained by the best optimization method. The results show that the good insulation system would make insulation resistance in each branch increase and the time constant decrease.
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