Water Supply Control System Based On The Kingview Plc And Inverter Design

At present, most of the pumps used to be controlled by the traditional way, this refers to the water pumps running under constant speed, the flow control is achieved by operating valves. On the one hand, this results in energy s waste, on the other hand, it leads to "water hammer effect" easily. The way of constant pressure water supply can solve these questions.The system of constant pressure water supply can be made easily due to the development of inverter. This thesis is divided into eight chapters.In chapter I, the current situation of water supply, the mode of constant pressure water supply, and the major job of this project are introduced,. In chapter II, the control scheme is established on the basis of discussion of different options. In chapter III, the classical control theory is used to analyze the system, first of all, the static model is established by using the experimental data , and then the whole system transfer function is established too, in the end of this chapter,the PID parameters are designed by using analytical methods ,and the system is simulated by using the software of Matlab.In chapter IV and chapter V, the inverter and PLC are briefed and the principle of inverter and energy-saving theory are expounded. In chapter VI ,themonitoring and the control system are designed by Kingview, the design process includes: the creation of a new project, the definition of variables of Kingview and animation connection.In the end of this chapter , the link way of S7-200 and Kingview are introduced.In chapter VII, the electrical drawings, PLC programming, and the inverter function codes are designed, the drawings include: the operation panel and a schematic, the inverter wiring diagram, the PLC external wiring diagram and PLC programming frame.The design includes the switches of local and remoter ,automatic and manual. The main visual screen can display the current of inverter , measured value of pressure, and setting value of pressure.The switching button on the screen can be switched to other pictures. The design can be widely used in life water supply, high building water supply, industrial water supply ,and so on ,in order to achieve energy-saving, easy operation and maintenance, safe and reliabe purposes.