摘要
现代工业用电环境由于负载的多变性而存在过多干扰噪声。传统的电压监控系统监控手段单一,频率检测多采用硬件检测导致检测精度误差较大。针对此现象设计了一种基于DSP和CPLD架构软硬件结合的工业用三相电压检测系统,并以高精度电流型电压互感器作为采样元件,利用线性拟合法计算电压有效值及使用FFT-Rife算法计算频率,并使用LCD作为人机交互界面。经过测试该系统能实现高精度测量要求,且体积小、方便现场调试与安装,具有一定的实用价值。
The modem industrial environment has too much interference noise due to the load variability. The traditional method of monitoring the vohage monitoring system is simple, meanwhile the detection accuracy of frequen- cy detection is much more than that of the frequency. An industrial three-phase voltage detection system is designed based on the DSP and CPLD architecture, which combines the hardware and software, with the high precision current voltage transformer as the sampling element. The voltage effective value is calculated by linear fitting and the frequen- cy by the FFT-Rife algorithm, using the LCD screen as man-machine interface. The system achieves the high preci- sion measurement requirements, with small size, convenient debugging and installation site.
出处
《电子科技》
2017年第2期22-25,共4页
Electronic Science and Technology
