继电保护中多路模拟量采集系统的设计

介绍了一种基于高性能浮点DSP芯片TMS320C32、CPLD芯片XC95288和A/D采样芯片AD976组成的多路采集系统的工作原理以及设计方法。通过对第一路施加特殊的电压量,在CCS开发环境下读取采样缓冲区的值,并利用Matlab对采样数据进行了全波傅氏变换。此外,该系统已在继电保护中得到广泛应用,实践表明,该系统能较好地解决多路模拟量的采集,并确保了采样数据的安全可靠性。

Design of a Multi-channel Analog Collection System in Relay Protection

This article describes an operating principle and design method to achieve a multi-channel collection system based on high-performance floating-point DSP chip TMS320C32,CPLD chip XC95288 and A/D sampling chip AD976.By applying a special voltage to the first channel,the value of the sample buffer in the CCS development environment is read.The sampling data is transformed in full-wave Fourier using the Matlab.This system has been widely used in relay protection.Practice shows that this system can achieve the collection of multi-channel analog and ensure the security and reliability of sampling data.