本文提出了对电力系统参数进行交流采样的设计思想,结合实例介绍以TMS320C240DSP与高速14位A/D转换器AD7863构成的数据采集系统,给出了采样算法、硬件电路及软件流程等。 关键词:交流采样 DSP 锁相环 Abstract: A designing method of A.C. Sampling for Power Systems Parameters is presented in this paper. The sampling algorithm ,hardware circuits and software flowchart are given for measuring A.C. signal using TMS320C240 and AD7863. Keywords: A.C.sampling DSP PLL