Journal of Engineering Research

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.

PLC; Constant pressure water supply; Control system; PID algorithm; Frequency converter