Dynamic Modeling of Variable Speed Pumps in Pressurized Irrigation System Considering Energy Consumption Analysis (Case Study: Ashrafieh Agro-Industry Irrigation System)

Variable water requirement in growing season, altitude difference in hydrant points, incompatibility in irrigation hours, cropping pattern alternation as well as other environmental factors are conducive to dynamical factors to influence the operation of pumping stations. Thus, pumping stations have dynamic or time-dependent operation. In this study, we examined operation of variable speed pumps in an olive plantation of 85 ha in Ashrafiyeh agro-industry complex located in Qazvin province, considering various utilizing condition. In this regard, the dynamic model of the pumping station is developed and presented using MATLAB/SIMULINK software. The results inferred from five operation scenario's simulations represent 18 percent reduction in energy consumption of controlled pumping station with variable speed mode compared to constant speed mode operation. Moreover, the analysis of the results from hydraulic sensitivity index in variable speed pumps indicated that the highest amount of model sensitivity to pressure difference occurs during utilization time.