WYB型微机保护双AD采样板的设计

The design of double sampling AD for WYB micorcomputer protector

传统微机保护一般均使用单通道AD采集方式,由于器件故障损坏,采样数据异常可能造成保护误动的问题,针对WYB型微机保护装置分析找到了故障的原因,并由此设计出了新的双AD采样板。该板通过严格实验后,目前已投入现场运行,运行情况良好,达到了提高整套装置可靠性,且升级简便易行的设计要求,此设计给老一代WYB型微机保护提供了一个经济便捷的完善方式。介绍了该双AD采样板的设计原则、硬件部分主要构成及软件工作原理。

Traditional micro-computer relay used singal-channel sampling AD circuit. In order to solve incorrect action caused by fault of sampling AD, this paper develops a set of double-channel sampling AD system. With the experience of the operation in hydro-power plant, it＇s characteristics has proved that it meets the demands of high reliability and conveniently upgrade. This paper introduces its structure of hardware and working principle of software.