Application of Constructed Complex Wavelet in Power Quality Disturbances Detection

摘要：

The traditional real wavelet transform can not provide signal phase information, so there is a big limitation in transient power quality disturbances detection. Based on the orthogonal and compact support set db4 real wavelet, corresponding complex wavelet is constructed in this paper. The detailed solving process of high-pass and low pass filter coefficients is given. Analyzing the phase characteristics of complex wavelet transform, the practical criteria for disturbances detection by using constructed db4 complex wavelet are put forward. For three typical disturbances signal, i.e. pulse interferences, voltage sag, oscillatory transient, MATLAB simulation experiments are carried out. Results show that when traditional real wavelet can not discover disturbances, the method proposed in this paper is still valid and detection accuracy is independent of the size of disturbances.

关键词： power quality constructed complex wavelet disturbances detection phase information

作者: Gong Jing

作者单位: College of Electrical and Information Engineering Beijing University of Civil Engineering and Architecture, BUCEA Beijing, China

会议类型: 国际会议

会议名称: 2011 IEEE 2nd International Conference on Computing，Control and Industrial Engineering(CCIE 2011)(第二届计算、控制与工业工程国际会议)

会议地点: 武汉

会议语种:英文

页码: 155-158

在线出版日期: 2011-08-20（万方平台首次上网日期，不代表论文的发表时间）