基于DSP的电能质量监测仪的研究

INSTRUMENTATIONPower quality monitoring instrument based on DSP

针对电网中存在的高次谐波以及需要对电能质量参量进行长期实时监测和分析,提出了一种基于DSP的电能质量监测仪的方案。利用快速FFT对数据采集卡同步采样得到的电压、电流信号进行数据处理,达到对电能质量参量的显示分析。本文介绍了该系统的工作原理以及硬件和软件的设计。实验结果表明,该系统能够对电能质量参量进行长期实时监测和分析,且谐波分析次数达到100次,相位分析误差小。

A power quality monitoring instrument based on DSP was proposed for the existing high-order harmonic in the power grid and the quality parameters need for long-term monitoring and analysis in real time. Using fast FFT carried on data processing for the voltage and current signals synchronize sampled by the data acquisition card to achieve the display and analysis on power quality parameters. This article describes the working principle of the system and the design of hardware and software. Experimental results show that the system can long-term monitor and analysis the power quality parameters in real time, and the number of harmonic analysis can reach 100 times and the error of phase analysis is small.