The pump-storage system is used to improve the reliability of water supply, particularly in locations where water supply is unreliable. However, the drawbacks of this system are excessive pumping and water loss to tank overflow. Therefore, an operational optimisation is proposed to address these challenges. This paper presents a linear programming model to minimise the operating cost of the proposed system under the timeof-use (TOU) electricity tariff. The model is applied to a practical case study and solved by the solving constraint integer programming (SCIP) solver in MATLAB’s OPTI toolbox. Simulation results show that the proposed approach eliminates water loss to tank overflow and improving energy savings by up to 18.3%.
Keywords operation optimisation, energy-water nexus, water supply system, pump scheduling