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南水北调中线配套工程输水系统具有线路长、流量大、分支多、运行调节复杂的工程特点。根据输水系统水力过渡过程仿真计算分析,为满足各用水点压力、流量的要求,在供水管线末端设置调节阀。结合PLC控制设备,根据流量信号实现PID闭环调节的基本要求,同时根据配套供水调度需求及末端水厂处理能力、需水量,通过软件编程,响应总运行调度,实现流量分配、调度、调节与保护功能。目前南水北调中线配套工程部分输水系统已按照既定目标成功通水运行。
South-to-North Water Diversion Project supporting water supply system has the characteristics of long line, large flow, many branches and complicated operation and regulation. According to the simulation calculation and analysis of the hydraulic transition process of the water delivery system, in order to meet the requirements of pressure and flow of each water point, a regulating valve is set at the end of the water supply line. Combined with PLC control equipment, according to the flow signal to achieve the PID closed-loop regulation of the basic requirements, and at the same time according to supporting water supply scheduling needs and end water treatment capacity, water demand, through software programming, in response to the total operation scheduling, flow distribution, scheduling, regulation and protection Features. At present, part of the water diversion system for the auxiliary works of the midline of the South-to-North Water Diversion Project has been successfully operated with water flow in accordance with the established objectives.