本设计介绍了恒压供水系统的控制策略，分析了典型的恒压供水系统控制方案,阐述了应用该恒压供水系统的经济效益。本次设计是通过管网瞬间压力变化，自动调节某台水泵的转速和三台水泵的投入及退出，使管网主干管出口端保持在恒定的设定压力值，并满足用户的流量需求，使整个系统始终保持高效节能的最佳状态，经过精心设计与反复调试，设计出一套自动化程度高，测量准确，操作简单，适用范围广，界面丰富的三泵恒压供水系统。-Introduced the design of the control constant pressure water supply system strategy, analysis of a typical constant pressure water supply system control program, application of the constant pressure on the economic benefits of water supply systems. The design is the pressure through the pipe network changes in an instant, automatic adjustment of the speed of a pump and three inputs and from the pump, so that the trunk pipeline network to maintain possession of the exit set in the constant pressure and flow to meet the needs of users, the whole system has to maintain the best energy efficient, designed with repeated testing, the design of a high degree of automation, measurement accuracy, simple operation, applicable to a wide range of rich interfaces Pump Constant Pressure Water Supply System III.