水电站DCS系统模拟量输出模块在线自诊断设计

Design of on-line fault self-diagnosis of analog output module in hydropower station distribute control system

随着水电站自动化水平的不断提高,分布式控制系统(Distributed Control System)越来越多地被应用到水电站的自动化控制中。模拟量输出模块作为DCS控制系统的重要组成部分,除了要具备输出精度高的特点外,还要具备在线诊断的能力,以保证输出到现场执行机构的信号准确、有效。本文将介绍一种高精度且具备在线自诊断功能的模拟量输出模块,并给出测试结果以证明设计正确有效。

With the improvement of automation level in hydropower plants,Distributed Control System(DCS) has been widely used in hydropower plant automatic control.The analog output module,which is an important component in DCS,should possess on-line fault diagnosis capacity to guarantee the accuracy and efficiency of the signal in addition to being equipped with high precision.This paper will introduce a novel analog output module with high precision and on-line fault diagnosis capacity.The test results will demonstrate the veracity and effectiveness of the design.