基于DSP的电能质量参数采集装置的设计

Design of Power Quality Parameter Acquisition Equipment Based on DSP

针对当前电能质量问题日益受到关注,电能质量参数采集装置功能单一、处理速度较慢的问题,设计了一种基于DSP的电能质量参数采集装置.该装置以TMS320F2812为核心处理器,在分析稳态谐波和暂态电能质量问题时分别采用锁相倍频电路和TMS320F2812中的事件管理器触发A/D转换.通过做FFT检测电网中的稳态谐波成分,利用小波变换分析暂态电能质量问题,并通过LCD显示检测结果.同时,该系统还可通过串口将数据上传至上位机.经测试,该系统功能齐全且处理速度较快,对稳态及暂态电能质量问题均可进行准确检测.

To solve the problem that people increasingly pay attention to the power quality problem, the power quality parameter acquisition equipments＇ functions and processing speed are simple and slowly, this paper designs a power quality parameter acquisition equipment based on DSP. This equipment is based on digital signal processor--TMS320F2812. The phase locked loop doubled frequency circuit and the Event Managers in TMS320F2812 trigger AD converter when analyzing stationary tune wave and transient power quality problem. The equipment detects the stationary tune wave via FFT, and analyses transient power quality problem via Wavelet Transform. The results can be displayed by liquid crystal displayer. In addition, the equipment can upload the data to a high level computer through serial communication. Through training, the equipment has various functions and a high processing speed, and can detect stationary and transient power quality problem.