Based On Configuration, Inverter And Plc Control Of Constant Pressure Water Supply System

High-rise buildings with intelligent technology advances, the rapid social and economic development, people on water quality and water supply to demand for improved system reliability; coupled with the current energy shortage, low-carbon living into a lifestyle, the use of advanced automation technology, control technology and communication technology, making the different areas of constant pressure water supply system to achieve high performance, high-energy into technology trends.It is very important of the Water Supply System in Constant Pressure for the water supply in industrial and citizen existence. It is consist of the variable frequency and speed regulation, PLC, PID control system for the control system. It controls the outcome of the pumps. The generator pumps are consist of parallel three pumps, and the power come from variable frequency and speed regulation or power grid. According to the water supply of constant pressure's outcome water press and flux, the control system control the variable frequency and speed regulation, parallel pumps'speed and cut over, cause the system move in the best rational situation, assure according to wants supply water. This design has many merits such as save energy.In this paper, the control principle of VVVF providing-water system is introduced, we use PLC to carry on logic control and use inverter to modulate pressure. Through PID control principle.we realize Closed-loop control in VVVF Providing-water System. The result indicates that the system has the stable pressure, simple structure, and reliable work.