An Improved Chirplet Transform and Its Application for Harmonics Detection

• 作者: Feng-Feng Zhu Guo-Sheng Hu
• 来源期刊: 电路与系统(英文)
• 学科: 医学
• 关键词: HARMONICS IMPROVED CHIRPLET Transform (ICT) S-TRANSFORM TIME-FREQUENCY Representation (TFR)
• 年，卷（期）: 2011,（3）
• 页码范围: 107-111
• 页数: 5页
• 分类号: R73

摘要

The chirplet transform is the generalization form of fast Fourier transform , short-time Fourier transform, and wavelet transform. It has the most flexible time frequency window and successfully used in practices. However, the chirplet transform has not inherent inverse transform, and can not overcome the signal reconstructing problem. In this paper, we proposed the improved chirplet transform (ICT) and constructed the inverse ICT. Finally, by simulating the harmonic voltages, The power of the improved chirplet transform are illustrated for harmonic detection. The contours clearly showed the harmonic occurrence time and harmonic duration.