近似线性相位复小波的电能质量扰动检测  

Power Quality Disturbance Detection Based on Approximately Linear Phase Complex Wavelet

作　　者：陈国志[1] 陈隆道[1] 蔡忠法[1] 

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《电力系统及其自动化学报》2009年第2期53-56,共4页Proceedings of the CSU-EPSA

摘　　要：分析了利用小波方法对电能质量扰动检测的局限性,从完全重构滤波器组出发,探讨了小波与完全重构滤波器组的关系,并在Daubechies所得结论的基础上提出了用近似线性相位正交紧支对称复小波的构造方法,将其应用于微小电能质量扰动信号检测。仿真结果表明,利用该类复小波的相位信息和恰当的组合信息可准确检测出电压微小扰动的突变点,且该类复小波能采用Mallat算法,具有良好的实时性。The limitation of power quality disturbances detection methods is analyzed. Starting from the perfect reconstruction filter banks the relationship between the wavelet and the perfect reconstruction filter banks is discussed. Based on the results of Daubechies, the construction method of complex wavelet is proposed which utilizes approximately linear phase orthogonal compactly-supported symmetry complex wavelet. And it is applied to the trivial power quality disturbances detection. The simulation results show that the trivial voltage disturbances can be accurately detected by using the phase information and combined information of the complex wavelet,and this kind of complex wavelet can use Mallat algorithm,which is of good real-time ability.

关 键 词：电能质量 复小波 线性相位 滤波器组 扰动检测 

分 类 号：TN911.4[电子电信—通信与信息系统]