摘要
针对在电力系统保护中的交流信号采样实时性问题,采用VxWorks平台实现了快速交流信号采样及有效值计算,并对其中的关键程序——离散傅里叶算法进行了优化设计,包括快速查表、定点乘法、快速开方运算等。通过32位RISC内核微处理器硬件平台的验证结果显示,优化后的数据处理结果仍保持了较高精度,但时间大幅度缩短。
A relay protecting equipment system is designed based on VxWorks platform, in order to ensure real-time perfor- mance of alternate current sampling of the system. The proposed system achieves rapid sampling and RMS calculation. The key pro- gram of the system DFT algorithm is optimized through fast look-up table, fixed multiplication, rapid root operation and so on. The system is verified by hardware platform based on 32-bit RISC core. The results show that the optimized data processing results still maintain high accuracy, and the calculation cost is greatly reduced.
出处
《电子技术应用》
北大核心
2011年第2期26-28,共3页
Application of Electronic Technique
