一种瞬时谐波参数估计的新方法  

Novel Method for Instantaneous Harmonic Parameters Estimation

作　　者：吕干云[1,2] 吴传满[2] 吴育聪[2] 李军[1] 

机构地区：[1]南京工程学院电力系,南京210014 [2]浙江师范大学数理信息学院,金华321004

出　　处：《电力系统及其自动化学报》2014年第9期7-11,共5页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金项目(51107120;51147010);江苏省属高校自然科学基金项目(11KJB470007);南京工程学院校级科研基金项目(YKJ201214)

摘　　要：为解决动态谐波的瞬时参数估计问题,提出了一种瞬时谐波参数估计的新方法。假定信号的各谐波分量都分布在有限频带内,通过该信号卷积相应频带理想带通滤波器的冲激响应,即可得到信号的滤波输出,将各带通滤波器输出在零频率处展开,就能得到对应谐波分量的瞬时参数,从而实现该多分量信号的瞬时谐波参数估计。算例结果表明,该法能较好地完成动态谐波的瞬时振幅、频率估计,并具有良好的精度、实时性。In order to tackle the instantaneous parameters estimation of dynamic harmonic,a novel method is proposed for instantaneous harmonic parameters estimation.It is assumed that each harmonic component of a signal is spaced in frequency-limited domain in this paper.The output signal of the band-pass filter can be obtained via the signal convolution with the impulse response of an ideal band-pass filter.By expanding each filter output at the zero frequency,instantaneous parameter of the corresponding harmonic component can be estimated,and the instantaneous harmonic parameters estimation of multi-component signals can be realized.The results indicate that the method can archieve instantaneous amplitude and frequency estimation for dynamic harmonic,and it has high performance of precision and real-time utilization.

关 键 词：带通滤波器 多分量信号 瞬时谐波 参数估计 谐波分量 

分 类 号：TM714[电气工程—电力系统及自动化]