变压器油纸绝缘回复电压数学解析与仿真分析

利用回复电压法获得极化谱可用于诊断变压器的绝缘状态。而等效电路可以分析其弛豫过程的极化特性。通过研究徳拜模型等效电路,提出了一种辨识单一徳拜模型等效电路参数的数学解析方法,可以快速得到等值电路参数并研究其对绝缘系统的影响。对回复电压计算通式的推导与仿真,验证了利用极化谱判断油纸绝缘老化特性的正确性,为评估变压器绝缘状态提供了新方向。

Mathematical Analyzing and Simulation Analysis of the Return Voltage of Oilpaper Insulation of a Transformer

To use return voltage method to get polarized chart can be used to diagnose transformer insulation state,and equivalent circuit can analyze the polarization characteristic of its relaxation process,By studying the equivalent circait of Bebye model,a mathematical analysis method of identifying single equivalent circuit of Dedye maodel,which can quickly get equivalent circuit parameters and study the effect of its insulation system. For the derivation and simulation of the return voltage computing formula,it has proved validity use the polarized chart to judge oil paper insulation ageing characteristic,which provides a new direction for estimating transformer insulation state.