Abstract

Due to global warming and population growth, preserving and guaranteeing clean water and electricity access has become harder. For this purpose, Energy-water microgrids (EWMGs) have been proposed to manage both resources efficiently. In these systems, resource management is traditionally performed at the tertiary control level, on large time windows, whereas integration of renewable energy sources requires faster controllers. Several works proposed moving energy cost management to the secondary control level as a solution, achieving quick responses to perturbations. Inspired by this idea, We propose to solve the water-energy co-optimization at a secondary control level timescale, using the Karush-Khun-Tacker (KKT) conditions of the centralized economic dispatch (ED) of an EWMG. The proposal is validated through simulation, achieving an 11% operational cost reduction. While our simulations were executed on only one type of EWMG topology, the approach presented can be generalized to any topology.