【摘要】 设计了基于高性能的ARM微处理器和嵌入式实时操作系统的微机保护装置。在硬件方面以Cortex_M3内核ARM LPC1768为核心,实现了硬件框架结构以及各功能模块,并考虑了硬件抗干扰的措施;在软件方面采用了"主保护元件"与"子保护元件"组合的方式,实现了保护元件灵活配置机制的方法,使装置可以满足不同类型的设备、回路的要求和变化。在核心算法设计中,对傅里叶加窗插值算法、半波傅里叶算法和最小二乘3种典型算法进行了理论分析和仿真验证,对比了各种算法的计算误差。最后通过对过电流动作值、动作时间、延时时间等参数进行的试验,对结果进行了误差分析和误差矫正,精度能够满足工程要求。更多还原

【Abstract】 This paper designed a microcomputer protection device based on high-performance ARM microprocessors and embedded real-time operating systems. In the aspect of hardware,the ARM LPC1768 is adopted as the core hardware,which realizes the overall structure of protection relay the measures of anti-jamming in hardware design were also discussed. In the aspect of software,it adopts the "main protection components"and"second protection components"combination method,which realizes the protection element flexible configurable mechanism,meeting requirements of different types of devices,circuits and change. In the design of core algorithm,the Fourier window function interpolation algorithm,half-wave Fourier algorithm and least squares algorithm were analyzed and simulated based on the theory,the various calculation errors of the algorithm were compared. Through the experiments of overcurrent action value,action time,delay time parameters,the results were error analyzed and error corrected,the precision can meet the job requirements.更多还原