基于DSP和CPLD的电能参数监测系统设计

Design of Electric Power Parameter Monitoring System Based on DSP and CPLD

电能质量监测技术是当前电力系统领域的研究热点。针对电网三相电压及电流信号的采集与处理,设计了电能质量检测装置的数据采集系统,系统采用DSP作为核心处理器,完成了多通道数据采集、数据处理、键盘显示、复杂可编程逻辑控制器CPLD与单片机外围接口等关键模块的软硬件设计。在硬件方面,重点介绍以DSP和CPLD为核心的电力参数检测电路以及CPLD和锁相环组成硬件同步采样电路;在软件方面进行了相关软件算法设计,同时介绍了电力参数检测的主程序。实验表明,系统具有响应速度快、精度高、实时性好的优点。

Power quality monitoring technology is the hotspots of current research in the field of power systems.Based on three-phase power grid voltage and current signal acquisition and processing,this paper designs the power quality monitoring device data acquisition system.The system uses DSP as the core processor,completed a multi-channel data acquisition,data processing,keyboard and display,CPLD and microcontroller peripheral interface hardware and software design.On the hardware side,the system takes DSP and CPLD as core of power parameter detection circuit,and complex programmable logic device CPLD and phase-locked loop（PLL） as synchronous sampling circuit;About the software,designed relative software arithmetic.At the same time,the main program of electric power parameters detection was introduced.Experiments show the proposed system has fast response,high accuracy,and real-time processing.