基于二进小波变换的变压器励磁涌流识别

Identification of Transformer Inrush Current Based on Wavelet Transformer

如何区分变压器励磁涌流和短路电流是众多学者研究的热点问题之一。在二进小波变换模极大理论基础上,详尽的分析了标准正弦波、励磁涌流及短路电流小波变换后的波形特点,并归纳出了识别变压器励磁涌流的判据。采用实际变压器励磁涌流数据进行的分析和基于DSP保护装置的程序实验表明该判据是有效的,具有一定的实际价值。

The difference between inrush current and short-circuit current is the focus of electrical specialist. This paper analyse the character of sine wave, inrush current and short-circuit current after wavelet transformer in detail. Based on this, it is concluded that criterion of identification inrush current in this paper. The analysis of data of inrush current and the experiment based on DSP indicated the effect of criterion.