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489-P5-HI-A20-E

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摘要：锅炉装置DCS控制系统采用ABB贝利公司的INFI系列N90系统，本文主要讲述了主控制器故障的处理过程，并对原因进行了分析。

1锅炉装置DCS控制系统介绍

公司热电厂锅炉装置承担着为公司提供高、低压蒸汽和汽轮机发电所需的能源，是热电厂重要的装置，其控制系统采用ABB贝利公司的INFI系列N90系统，目前已运行25年；在2000年对部分I/O卡件进行升级更换；2006年对操作站进行升级更换，操作站由一台服务器升级为两台。2010年对DCS电源进行升级改造。

2事故经过

2015年5月6日5时10分，仪表车间值班员接到值长打来的电话，说明#1炉装置DCS系统发生故障，大面积测量数据异常，许多执行器无法进行正常调节，要求其尽快赶往事故现场进行处理。赶到现场后发现#1炉大部分测量数据显示粉色（故障状态），32台二次风执行器无法正常操作，锅炉装置的温度、压力、液位等参数无法进行控制，装置随时有汽包满水、超压、超温等危险，控制系统急需恢复。

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