Optimization of the energy management in water supply systems

摘要

Water supply systems frequently present high-energy consumption, which correspond to thenmajor expenses of these systems. Energy costs are a function of real consumption and the dailynenergy tariff.nThis paper presents a model of optimization to guarantee the delivery of enough water tonpopulations, for each day. Although, in order to achieve that, energy for pumping is needed,nrepresenting the main cost for the companies that operate the systems. The model, developed innMATLABw, provides the best solution to take in each time step. Simultaneously the populationnwater consumption must be guaranteed, and the hydraulic system restrictions fulfilled. Thendefinition of optimal pumping schedules allows the reduction of operation and maintenance costsnassociated with pumping energy, as well as the increase of global hydraulic system efficiency.nThe rules are subsequently introduced into a hydraulic simulator (EPANET), to verify the systemnbehaviour along the simulation period. In addiction, a water turbine is introduced in one of thensystem’s branches. The economical benefits from the generated energy from the water turbinencan not be neglected and the wind complementary turbine for pumping supply provides alsonsignificant economical savings.