基于DSP和小波变换的电压暂态扰动在线检测方法研究  

Study of voltage transient disturbance on-line detection based on DSP and wavelet transform

作　　者：王飞[1] 黄细霞[1] 张兵[1] 骆秀江 

机构地区：[1]上海海事大学科学研究院航运技术与控制工程交通部重点实验室,上海201306

出　　处：《现代电子技术》2015年第4期150-154,158,共6页Modern Electronics Technique

基　　金：上海市科委科技创新行动计划项目(13dz1202800);交通运输部应用基础研究项目(2013329810350);国家自然科学基金资助项目(51209134)

摘　　要：设计了一款基于DSP2812的电压暂态扰动在线检测装置,研究了基于DSP和小波变换的电压暂态扰动在线检测方法。该装置通过霍尔传感器和模数转换芯片采集电信号,以高性能数字信号处理芯片TMS320F2812为核心信息处理单元,完成了DSP及其外围电路设计。采用小波变换在线检测电压暂态扰动,并在DSP中实现了小波算法,软件还包括主程序模块、A/D采集模块、中断模块、上位机处理模块和通讯模块等设计。实验首先在Matlab中进行了仿真实验,选取合适的小波函数,利用Matlab中的DB4小波对扰动进行定位;然后再利用信号发生器产生包含暂态扰动的信号,采用该文研制的装置进行了在线扰动定位。利用DSP强大的运算性能和高效的小波算法,能实现电量采集和电压暂态扰动的实时分析同步进行。实验表明:该装置精度高,数据处理速度快,可实现电压暂态扰动的实时检测。A voltage disturbance detection device based on DSP2812 is designed in this paper. A method of transient voltagedisturbance detection based on DSP and wavelet transform is studied. The system takes a Hall sensor and the parallel A/D con-verter chip as its acquisition circuit,and a kind of digital signal processing chip TMS320F2812 as its core information process-ing unit,by which the design of DSP and its peripheral circuit are achieved. The discrete wavelet transform（DWT）is adoptedto detect transient voltage disturbance on line and realize wavelet algorithm in DSP. Software modules including the main pro-gram module,A/D module,interrupt module,communication module and so on were designed. Its simulation experiment wasperformed in Matlab to choose suitable wavelet functions and to locate disturbance position by utilizing DB4 wavelet in Matlab.The signal generator is used to produce the signal including transient voltage disturbance. The power acquisition and real-timeanalysis of transient voltage disturbance can be realized simultaneously by the strong operation ability of DSP and the effectiveDWT algorithm. The contrast test shows that the system has high precision,high data processing speed and perfect capability forreal-time detection of transient voltage disturbance.

关 键 词：暂态扰动 小波变换 数字信号处理器 MATLAB 

分 类 号：TN710-34[电子电信—电路与系统]