Design and debugging of constant pressure water supply control system based on PLC
基于PLC的恒压供水控制系统设计与调试

摘要

针对传统供水系统水压不稳定、能耗高的问题，设计基于 PLC 的恒压供水控制系统。采用压力传感器实时采集管网压力，将信号反馈至 PLC 控制器，通过 PID 算法调节变频器输出频率，实现水泵转速控制与恒压供水。详细阐述系统硬件选型与软件程序设计，涵盖 PLC 型号选择、传感器参数确定、程序模块编写等内容。经调试运行，系统水压波动控制在 ±0.02MPa 内，节能效果显著，为供水系统智能化改造提供有效方案。

Abstract

In response to the issues of unstable water pressure and high energy consumption in traditional water supply systems, a constant-pressure water supply control system based on PLC has been designed. Pressure sensors are used to collect real-time pipeline pressure data, which is then fed back to the PLC controller. The PID algorithm adjusts the inverter output frequency to achieve pump speed control and constant-pressure water supply. This paper details the selection of hardware components and software program design, including the choice of PLC model, determination of sensor parameters, and programming module writing. After debugging and operation, the system's water pressure fluctuation is controlled within ±0.02 MPa, with significant energy savings, providing an effective solution for the intelligent transformation of water supply systems.