基于半波傅里叶算法的励磁涌流识别方法

以半波傅里叶算法为基础,对比分析了变压器差流为涌流和非涌流时的波形特点,进而提出了一种基于半波傅里叶算法的新型励磁涌流识别方法。理论分析和动模试验表明:该方法可以较好地克服传统制动原理的缺点,能够有效地区分励磁涌流和内部故障电流,并对对称性涌流有较好的识别效果。

New Method to Identify Inrush Current Based on Half-wave Fourier Analysis

This paper analyzes the difference between the magnetizing inrush current and other currents of transformer, and proposes a new method based on half-wave Fourier analysis to identify inrush current. Theoretical analysis and dynamic analog testing results indicate that the proposed new method can solve certain problems of associated with the traditional restraint methods and can distinguish inrush current, including symmetrical inrush current, from internal fault current.