Economic Dispatch of Generalized Multi-source Energy Storage in Regional Integrated Energy Systems

Abstract

The development of low-carbon technology has strengthened the linkage among various energy vectors in regional integrated energy systems (RIESs). For the sake of economy and stability, grid-level energy storage is in urgent need. To address this issue, a novel approach called generalized multi-source energy storage (GMSES) is proposed, taking advantage of synergies and complementary benefits of different energy systems. This paper focuses on the electricity-gas RIES, and two typical types of GMSES systems are studied based on the energy hub concept, while three modes of GMSES are modeled and analyzed, including charging, standby and discharging status. On this basis, an economic dispatch solution of GMSES is investigated along with steady-state multi-energy flow analysis, facilitating economic and stable operation of RIESs. Numerical studies show the applicability of the proposed method in this paper, and GMSES systems can be operated in a flexible way.