摘要
在电力谐波分析中,为了最大程度地抑制或消除频谱混叠对动态测控系统的影响,必须采用抗混叠滤波器。分析基于DSP电力谐波分析系统中产生频谱混叠的原因,介绍单一采样频率下模拟滤波器设计过程,为了降低对单一采样频率下模拟滤波器技术要求,又介绍采用过采样技术与∑-△式A/D转换器设计的模拟滤波器以及数字滤波器,取得了较好的抗混叠滤波效果。最后,从实际应用出发,给出由RC-运放和集成滤波实现高阶巴特沃斯抗混叠滤波器电路及其参数选择,具有一定实际应用价值.
In the harmonic analysis of electrical power,in order to maximize the suppressionor elimination of spectrum aliasing effect on the measurement and control system, anti-aliasing filter must be used. This paper analyzed aliasing causes in the harmonic analysis systemof electrical power DSP - based system. It introduced a single sampling frequency analog filter design process, and in order to reduce the technical requirements of a single sampling frequency analog filters, the paper also presented the use of over-sampling technique and ∑-△ type of A/D converter designing analog filter and digital filter, which achieved a better anti-aliasing filtering. For practical purpose, this paper puts hight-ranking Butterworth antialiasing circuits made up of RC_amplifier and integrated filter and the choices of its parameters, which have certain values in practical application.
出处
《沈阳理工大学学报》
CAS
2010年第5期25-29,54,共6页
Journal of Shenyang Ligong University
作者简介
崔旭晶（1964-），女，副教授，研究方向：电子科学与技术，测控技术及仪器．
