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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 voltage disturbance 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 adopted to 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 was performed 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?time analysis of transient voltage disturbance can be realized simultaneously by the strong operation ability of DSP and the effective DWT algorithm. The contrast test shows that the system has high precision,high data processing speed and perfect capability for real?time detection of transient voltage disturbance.