基于数字信号处理器的配电自动化终端装置

APPLICATION OF DIGITAL SIGNAL PROCESSOR IN DISTRIBUTION AUTOMATION TERMINAL UNIT

应用数字信号处理器 ( DSP)的特殊资源 ,采用 DMA方式实现主机与从机之间的双机通信 ,并利用 DMA功能实现主机下载 DSP程序。为了充分发挥 DSP的数据处理能力 ,采样系统通过CPLD构成了独立的采样控制逻辑。通过 FTU对采集量的计算和分析实现了单相短路和相间短路故障的判断以及故障定位、故障隔离及接地故障分析和检测等功能。经实际应用表明 ,应用方案及其实时算法是合理、可行的。

Based on the special resource of digital signal processor (DSP), the double computers communications between the host and the slave computer is realized with DMA mode, and the host computer can download DSP programs with DMA function. In order to make good use of the data processing ability of DSP, the sampling system is composed by CPLD, and it has the self governed sampling control logic. It is implemented by the FTUs' calculating and analyzing for the sampling parameters for the diagnosis of the single phase fault and the phase to phase fault, the fault location, the fault isolation and the analysis and measurement of ground fault. The application results show that this scheme and its real time algorithm are reasonable and feasible.