Optimum Simulation and Control of Fixed-Speed Pumping Stations

Abstract

Traditional set point control and operation of a pumping station using fixed speed pumps usually amplify both the frequency and magnitude of variations in the influent flow rate. The purpose of the present study is to develop a control strategy to minimize these unwanted hydraulic surges. To realize this, an optimum control model was developed using computer simulation. The model is suitable for both separate and combined pumping installations. It is superior to conventional set point control techniques and reduces the frequency of starting and stopping pumps as well as energy consumption. The model uses energy saving and outflow smoothing factors to provide the improved control. Appropriate values of the two factors will depend on specific site conditions, such as pump lift height, wet-well depth, number of pumps and their sizes.