局部放电窄带干扰抑制的数字滤波器设计

为了抑制现场局部放电中混杂的窄带干扰,提高局部放电脉冲的识别率,满足高速采样中信号实时处理的要求,介绍一种基于FPGA的嵌入式局部放电窄带干扰抑制的实现方法.根据局部放电信号和窄带干扰信号在频域上的不同特点,自适应设定窄带信号判定阈值并对其进行识别和滤除.使用DSP Builder和Simulink等工具构建算法模型,对混叠了多种窄带干扰和白噪声的局部放电信号进行处理,并把算法模型转化为可以综合的硬件描述语言.文章最后比较了在Simulink和Quartus Ⅱ两种不同仿真环境下的结果,验证了使用DSP Builder等设计开发FPGA算法的可行性.

Digital Filter for Discrete Spectral Interference Suppression in Partial Discharge

In order to suppress the Discrete Spectral Interference(DSI) in the detection of Partial Discharge(PD) signals and improve the identification rate of PD pulses in the real-time system,which samples and deals with the high-speed acquisition signals,a suppression method based on FPGA was introduced.According to the different characteristics of PD signals and DSI signals in the frequency-domain,this method was adaptively set threshold to identify and filter DSI.To deal with the signals mixed with PD signals,DS...