Optimal integration of interconnected water and electricity networks

Abstract

Abstract With the widespread deployment of advanced heterogeneous technologies and growing complexity in our modern society, there is an increasing demand for risk‐aware management and joint operation of interconnected infrastructures and lifeline networks. The coordination between Power and Water Networks (PWNs) is urgently needed as water networks are one of the most energyintensive critical infrastructures. This paper proposes a framework for day‐ahead operation optimization and coordination of the interconnected Joint Power and Water Networks (JPWNs). Unlike the state‐of‐the‐art where PWNs are individually operated in their respective domains, we present an integrated framework for PWNs that conjoins the Optimal Power Flow (OPF) mechanisms in power grids with innovative operation models of the water networks. Piece‐wise linearization is applied to the nonlinear hydraulic operating constraints to convert the proposed optimization model into a mixed‐integer linear programming (MILP) formulation. The suggested framework is applied to a 15‐node water network jointly operated with the IEEE 9‐bus and IEEE 57‐bus test power systems. The simulation results show the effectiveness of the proposed framework, resulting in cost reduction and energy‐saving when both systems’ operation is jointly optimized. The results show that the proposed methodology is scalable and computationally‐efficient when applied to larger‐scale systems.

Keywords

• Optimisation techniques
• Optimisation techniques
• Power system management, operation and economics
• Other applications of systems theory