摘要
针对微电网的电能供给相较于常规电网不稳定、谐波的干扰更加严重的情况,设计了一种新型的基于ARM-Cortex M4内核的微电网谐波分析仪。详细阐述了微电网的发展与现状,论述了谐波检测对于微电网系统的必要性。介绍了微电网检测仪的硬件部分,包括前级电压电流转换电路、信号调理电路、单片机处理电路和显示电路。软件部分介绍了基于Cortex M4内核的FPU单元的快速傅里叶变换系统和FIR滤波器系统,并阐述了整个软件系统的结构。最后分析了电网谐波检测仪的性能。
The power supply of micro grid is less stable than of conventional grid,and the harmonic interference is more severe,aiming at this situation,the new harmonic analyzer based on ARM-Cortex M4 core has been designed for micro grid. The development and current status of micro grid are described in detail,and the necessity of harmonic detection of micro grid system is expounded. The hardware of the micro grid harmonic analyzer is introduced,including the front stage voltage current conversion circuit; signal conditioning circuit; single chip computer processing circuit and display circuit. For the software,the FFT system and FIR system based on FPU( floating point unit) of Cortex M4 core are presented,and the structure of overall software system are described. In addition,the performance of the harmonic analyzer is also analyzed.
出处
《自动化仪表》
CAS
2015年第10期85-88,共4页
Process Automation Instrumentation
