现代电能质量监测装置的数据采集系统设计

Design of Data Acquisition System for Modern Power Quality Surveillance Equipment

针对电网三相电压及电流信号的采集与处理,设计了电能质量监测装置的数据采集系统。系统以霍尔传感器和串行A/D转换芯片组成前向采集电路,以数字信号处理器(DSP)组成数据处理电路,以复杂可编程逻辑控制器(CPLD)和锁相环组成硬件同步采样电路并以快速傅立叶变换为主要处理算法。实验表明:系统具有响应速度快、精度高、实时性好的优点。

A data acquisition system of modem power quality surveillance equipment is designed for acquisition and processing of three - phase voltage and current from electric network. The hardware is composed of three parts. The first is forward acquisition circuit made up of Hall sensor and serial ADC, the second is data process- ing circuit made up of digital signal processor （ DSP）, and the third is hardware synchronized sampling circuit made up of CPLD and PLL; finally, the software arithmetic is principally made up of FFT. Experiments show that the system has the advantage of quick response speed, high precision and good real - time.