【摘要】 本文介绍了基于TMS320F2812DSP的智能脱扣器的设计,包括硬件实现电路和软件控制策略。硬件电路描述了各个模块的结构及功能。系统软件设计上,判断出现短路故障时主要采用了一种改进的全波傅式算法,对短路电流的直流分量和基波分量进行分析,以减少计算电流有效值的误差;而在正常情况下采用全波傅式算法计算电流有效值,然后根据电流值大小采取不同的控制策略,达到智能脱扣器的保护功能。更多还原

【Abstract】 An intelligent trip based on TMS320F2812DSP is presented,including the circuits of hardware of the trip and the software of controlling strategies.The structures and functions of hardware is described.In design of system software,while occurring short-circuit fault is judged,an advanced full-scale-fast-Fourier transform(FFT) is mainly adopted to compute DC component and fundamental component,in order to reduce the errors of calculating the root-mean-square(RMS) of current;Normally,full-scale-FFT is taken to count the value.According to the value of current,various controlling methods are assumed to achieve protection functions of intelligent trip.The flow charts of the main and sampling procedures are also provided.更多还原