Coordinated Regional-District Operation of Integrated Energy Systems for Resilience Enhancement in Natural Disasters

TLDR

The study proposes a coordinated regional‑district operation of integrated energy systems to enhance resilience during extreme conditions. The authors develop a bi‑directional flow model with power‑to‑gas technologies linking a regional IES that co‑optimizes power and gas networks to a district IES modeled as an energy hub, and formulate a tri‑level two‑stage robust optimization with a two‑level Benders‑decomposition algorithm to handle random outages. Numerical tests on a 6‑bus electrical‑6‑node natural gas system and a modified IEEE RTS‑79 40‑node natural gas system demonstrate that the model and algorithm effectively enhance IES resilience.

Abstract

This paper proposes a coordinated regional-district operation of integrated energy system (IES) for enhancing resilience in extreme conditions. A bi-directional flow model is established for regional-district IES with the utilization of powerto-gas technologies which shows how regional and district IES can jointly enhance the IES resilience. The regional IES co-optimizes power grid and natural gas networks, while the district IES coordinates the energy conversion and storage facilities. The district IES is modeled as an energy hub which supplies electricity to the regional IES. A tri-level two-stage robust model is established to accommodate random outages caused by natural disasters in both natural gas and electricity generation and delivery systems. A two-level algorithm utilizing Benders decomposition and column-and-constraint generation algorithms is proposed to solve the robust IES problem. Numerical results tested on a 6bus electrical-6-node natural gas system and a modified IEEE RTS-79 40-node natural gas system show the effectiveness of the proposed model and solution technique for enhancing the IES resilience.