摘要
作为微机继电保护测试仪核心部件之一,数字信号发生器的品质直接影响测试系统的整体性能。本文介绍了基于的高性能DSP芯片TMS320F2812实现直接数字频率合成器的工作原理、设计思想和软硬件结构;并提出一种优化的DDS实现方法,通过试验证明可进一步提高数字信号发生器的实时性与稳定性。该系统在一种新型微机继电保护测试仪中得到应用;实际应用表明:该类型测试仪可完成各类型的继保测试实验。
As one of cores of microcomputer relay protection testing device, qualities of digital signal generator influence on the integer performances of microcomputer relay protection testing device directly. The operational principle, design philosophy and SW/ HW structure of direct digital frequency synthesizer （DDS） base on high performance DSP are introduced, and presents an optimized approach of DDS, experiments prove that it could improve the real time and stability performances of digital signal generator. This system is applied in a new microcomputer relay protection testing device. The application indicates that this device can accomplish various relay protection testing experiments.
出处
《电测与仪表》
北大核心
2005年第10期24-26,共3页
Electrical Measurement & Instrumentation
关键词
数字信号发生器
直接数字频率合成
数字信号处理器
微机继电保护测试仪
digital signal generator
direct digital frequency synthesizer
digital signal processor
microcomputer relay protection testing device
