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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。
The application of digital signal processor (DSP) special resources, the use of DMA to achieve master-slave communication between the two machines, and the use of DMA to achieve host download DSP program. In order to give full play to the DSP data processing capabilities, the sampling system through the CPLD constitutes a separate sampling control logic. Through the calculation and analysis of the collection volume by FTU, it can judge single-phase short-circuit and interphase short-circuit fault as well as fault location, fault isolation and ground fault analysis and detection. The practical application shows that the application scheme and its real-time algorithm are reasonable and feasible.