【摘要】 本文详细论述了变电所微机监控系统中的测量前端—交流采样及Ａ／Ｄ转换装置的原理、结构和应用，对于变电所自动控制和自动保护有一定的参考价值。该系统具有快速、准确、可靠、维护简单及成本低等优点，是变电所自动控制和安全运行必不可少的前提，更是电力自动化发展的方向。更多还原

【Abstract】 In this paper,the principles structure and application of alternating current sampling and A/D converter of the substation in the computer monitoring system was described in detail.This paper has some reference value for the automatic control and protection of the substation.The system with the advantages of quick,accurate,reliable,easy maintenance and low cost,is not only an essential prerequisite to automatic control and safe running,but also a direction of the development of electric automation.更多还原