I/A’Series控制器双重启故障原因分析及处理

Reason analysis and treatment of restarting fault of I/A Series two controllers

广东珠海金湾发电有限公司#3,#4机组脱硫控制系统采用了福克斯波罗公司的I/A’Series分散控制系统,系统内的控制器会随机出现单个或者1对控制器离线重启的现象,严重威胁了机组安全、稳定运行。对系统管理计数器、控制器同步记录进行分析,确认了网络问题;对节点总线网络进行监控并分析各站间的数据流,最终确认厂级信息监控系统数据采集和发送程序Opifox造成了脱硫分散控制系统节点总线网络堵塞,从而导致控制器同步不一致而重启。通过更换数据采集和发送程序,最终解决了这一难题。

In the desulphurization control system of units No.3 and No.4 in Guangdong Zhuhai Jinwan Power Generation Company Limited,the Foxboro I/A Series distributed control system is adopted.The off-line and restarting phenomenon of single or double controllers in system occurred randomly,which threatens the safe and stable operation of the unit severely.The synchronous records of the system management counter and the controller were analyzed to determine the network problem;the node bus network had been monitored,and the data streams between stations were analyzed.It was determined finally that the data acquisition and send program of the supervisory information system in plant level,Opifox,caused the congestion of the node bus network of desulphurization distributed control system,which makes the two controllers to be asynchronous and to start up again.The data acquisition and send program had been replaced,and at last,the difficult problem was solved.