At present, water islands with centralized arrangement is widely used in thermal power plants, which can realize unified coordination and intelligent control of each water system, and reduce the maintenance workload of operating personnel. On the basis of fieldbus control system (FCS) and FDMS software, this paper develops an intelligent water island control system, which comprises of system initialization module, water network control system module, data analysis system module and operation and maintenance manual module. Moreover, this control system is used to process the data collected from the monitoring system for each subsystems' feedwater and discharge, to calculate the water consumption with high precision, thus the water consumption in each subsystem of the power plant can be optimized based on the FCS big data analysis and gradient water use principle. By health analysis for controlled equipments in each subsystem, the problem of judging the public equipment starting process occurs in the water supply pipe system in water island is solved, the device fault warning and analysis can be carried out, and full automatic control for the water island system can be realized. The application of this intelligent water island control system in an ultra supercritical unit shows good control effect, which helps the unit save water and energy and realize fault prediction.%目前火电厂普遍采用集中布置的水岛系统,以实现对各个用水系统的统一协调和智能化控制,减少运行人员的检修工作量.本文基于现场总线控制系统(FCS)及FDMS软件,开发了智能水岛控制系统,该系统包括系统初始化、水网控制系统、数据分析系统、帮助运维手册4个模块.通过对燃煤电厂各子系统给排水量监测采集系统的数据进行加工处理,在水量精准计算的同时依托FCS大数据的分析,基于梯度用水原则,实现了燃煤电厂各用水子系统用水量的优化;对各子系统受控设备进行健康度分析,解决了水岛控制系统中供水母管工艺产生的判断启动公用设备问题,并可以进行设备故障预警及故障分析,实现了水岛控制系统的全自动化.该智能水岛控制系统应用在某超超临界机组中,控制效果良好,实现了火电机组用水系统节能降耗及故障预测.
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