摘要
对电力参数采集中常用的移相算法提出了改进,主要是针对选择窗函数时矩形窗过渡带窄但纹波较大,海明窗平滑但过渡带变宽、泄漏大等问题.在过渡带范围内使用非理想函数代替理想函数来设计FIRHilbert滤波器,并通过仿真比较,证明采用非理想化Hilbert变换设计的滤波器大大地改善了Gibbs现象,而且还能初步设定过渡带的截止频率.
In consideration of the fact in selection of window functions that the intermediate zone of rectangular windows is narrow, but its ripple is large, and the fact that the Hamming window is smooth, but its intermediate zone gets broad, and the leakage error is large, some improvements were made of the phase-shift algorithm in electric parameter acquisition. The non-ideal function, replacing the ideal function, was adopted to design the FIR Hilbert filter in the region of the intermediate zone. The comparison of simulated results proves that the adoption of the non-idealized Hilbert transformation to design the filter obviously reduces the Gibbs phenomenon, and can also set the cut-off frequency of the intermediate zone primitively.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第3期331-333,共3页
Journal of Hohai University(Natural Sciences)
关键词
电力参数采集
移相算法
Gibbs现象
滤波器
electric parameter acquisition
phase-shift algorithm
Gibbs phenomenon
wave filter
