厂区级冷却供水系统智能控制设计实现

Design and Implementation of Intelligent Control for Plant Level Cooling Water Supply System

摘要:

某厂区冷却供水系统只能以手动模式运行,无法实现自动恒压供水,能耗高、设备损耗大,对管网流量波动适应性差；通过重新设计系统Programmable Logic Controller (PLC)程序,进行加减泵逻辑控制和管网压力设置,实现了基于变频器的管网恒压控制；通过水泵轮巡逻辑控制和冗余配置,实现了水泵的自动轮换运行；通过水泵使能功能和管网压力手动设置功能,提高了系统控制的灵活性；通过优化水泵加载条件和触摸屏功能,消除了设备故障对系统自动运行的干扰,提高了系统的鲁棒性。经过10个月运行验证,系统能够长时间稳定工作,冷却供水泵组节能20%以上,实现了智能化控制。

Abstract:

The cooling and water supply system in a certain factory area can only operate in manual mode and cannot achieve automatic constant pressure water supply. It has high energy consumption, high equipment loss, and poor adaptability to flow fluctuations in the pipeline network; By redesigning the Programmable Logic Controller (PLC) program of the system, adding/subtracting pump logic control and pipe network pressure setting were carried out, achieving constant pressure control of the pipe network based on a frequency converter; The automatic rotation operation of the water pump is achieved through logical control and redundant configuration of the water pump wheel inspection; By enabling the water pump and manually setting the pressure of the pipeline network, the flexibility of system control has been improved; By optimizing the loading conditions of the water pump and the touch screen function, the interference of equipment failures on the automatic operation of the system was eliminated, and the robustness of the system was improved. After 10 months of operation verification, the system can work stably for a long time, and the cooling water supply pump group can save more than 20% energy, achieving intelligent control.