摘要
提出了利用小波变换实现测量信号各次谐波相位的方法,利用小波变换进行电力系统交流参数测量的优点在于小波域同时包含了这些交流参数的时-频关系.选择Harr小波进行研究,因为其具有良好的时间局部性和简明的解析表达式,而且在窗宽范围内能量泄露较小.并对该方法进行了误差分析,仿真结果表明,在不考虑采样过程中同步偏差情况下,该方法可以达到很高的测量准确度.
Discusses the theoretical basis for phase measurements of harmonics directly from the wavelet transform. The advantage of viewing the AC parameters of power system in the wavelet domain is that the domain preserves both the frequency and time relationship of these values. The reason to choose Hart wavelet is that it has excellent time localization performance, concise analytical expression and lower energy leakage on the window scale. A detailed discuss on error analysis of the proposed algorithm is given. Computer simulation result proves that phase measurement result using Harr wavelet transform is much accurate if the synchronous error is neglectable.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2005年第8期1119-1122,共4页
Journal of Harbin Institute of Technology
