摘要
采用磁调制式电流互感器法对含有脉动直流分量、甚至含有平滑直流分量的复杂波形剩余电流进行检测,同时采用基于IIR数字低通滤波器对采集的信号进行滤波处理,提高了滤波精度。基于浮点型DSP TMS320F28335进行软件设计,实现复杂波形剩余电流的精确采样分析,对复杂波形剩余电流检测满足标准要求。
The magnetic modulation principle-based detection method was used to detect complicated residual current, which is no longer just sinusoidal, hut includes pulsating DC, or even smooth DC, and the low-pass digital filter based on IIR filters was carried out to improve the filtering accuracy. The software was designed based on the floating-point DSP of the TMS320F28335 which accurately did the sample and analysis of complicated waveforms residual current. The design meets the standard requirements of the detection of residual current.
出处
《低压电器》
2012年第20期20-24,共5页
Low Voltage Apparatus
基金
国家自然科学基金资助项目(51077038)
关键词
复杂波形剩余电流保护
磁调制
IIR数字滤波器
DSP
complicated waveform residual current protection
magnetic modulation
IIR digitalfilter
DSP
