Dissertation > Industrial Technology > Electrotechnical > Transformers, converters and reactors > General issues > Maintenance,repair

Explore and realize the transformer protection principle based on wavelet transform

Author FangYuDong
Tutor XuXiDong
School Zhejiang University
Course Proceedings of the
Keywords Wavelet Transform Transformer protection Magnetizing inrush
Type Master's thesis
Year 2002
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Wavelet Transform analysis methods developed rapidly in recent years , with the multi-scale analysis and time - frequency localization characteristics , especially suitable for the edge and peak mutations in signal processing and feature extraction . The wavelet transform is applied to the identification of magnetizing inrush current , are discussed in detail using wavelet transform to distinguish between magnetizing inrush and fault current , proposed two comparison applicable to practical engineering methods . Combined with the latest 32-bit MCU , DSP chips and real-time multitasking operating system , and put forward a set of state-of-the-art protection programs can achieve the rapid identification of the inrush current of the transformer differential protection action more quickly and reliably .

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