该文介绍了一种基于FFT理论并用于电力系统实时补偿的电网参数检测系统.该系统能够自动采集电网实时电压、电流等数据,借助MSC1211单片机强大的数据处理功能对电网谐波予以分析,通过LCD显示采集信号波形、各次谐波分布图及各种电网电能质量参数,采集和分析后的数据还可通过串行口传入计算机,便于作进一步地分析、统计及存储.“,”This paper introduce a system for the real-time detection on power parameters in the basis of FFT theory, which was used for real-time compensation of power system. the system is able to collect real-time power grid voltage and current parameters automatically, and make electric harmonic analysis by means of powerfui data processing function of MSC1211 and display the collected signal wave,each number harmonic distribution graph and power quality parameters on LCD, the collected data can also be transferred to computer by scrial port for further statistical analysis.