基于级联原子库的谐波分析方法  

Harmonic Analysis Based on Cascade Atom Dictionary

作　　者：唐承志[1] 代云华[2] 何国军[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031 [2]西南交通大学信息科学与技术学院,四川成都610031

出　　处：《四川电力技术》2011年第6期43-45,73,共4页Sichuan Electric Power Technology

摘　　要：提出一种基于级联原子库的谐波分析算法,该方法首先构造包含余弦原子和冲击原子的级联原子库,然后用该级联原子库对谐波信号进行稀疏分解,从而得到各个谐波信号分量的稀疏表示。该方法用余弦原子来表示谐波信号,用冲击原子来表示脉冲噪声,因此该方法能将噪声和谐波信号分离看,对脉冲噪声具有一定的鲁棒性。仿真实验结果显示,在信号受到脉冲噪声受严重干扰时,仍能较好地分析出谐波信号的各个参数。A harmonic analysis algorithm based on cascade atom dictionary is presented. The cascade atom dictionary including cosine atom and pulse atom is built by the proposed method, and then the harmonic signal is decomposed using the cascade atom dictionary, thereby the sparse representation of each harmonic signal component is obtained. In this method, the cosine atom is used to represent the harmonic signal and the pulse atom is used to represent the impulse noise. Consequently, the har- monic signal and the noise can be separated by this method, impulse noise has the robustness. The simulation and experimen- tal results show that the various parameters of harmonic signals can still be analyzed by the proposed method when the signal is interfered by impulse noise seriously.

关 键 词：级联原子库 基追踪 谐波分析 

分 类 号：TM714[电气工程—电力系统及自动化]