Optimal Dispatch of an Integrated Energy System Considering Carbon Trading and Flexible Loads

Abstract

This paper proposes an optimal dispatch model of an integrated energy system (IES), with carbon trading and flexible loads (FLs) considered. First, the carbon trading is introduced into the dispatch model, taking into account the carbon emissions of the entire energy supply chain. Next, flexible loads are divided into three categories, i.e. curtailable, transferable and shiftable ones, which are respectively modeled in detail. On this basis, electric network constraints, natural gas network constraints, together with internal constraints of energy hubs (EHs) are integrated into the low-carbon economic dispatch model with an objective of minimizing the operation costs including the carbon trading cost, flexible loads dispatching cost and system energy cost. Finally, an integrated energy system including 9 energy hubs is employed to demonstrate the proposed model, together with detailed analysis about the impacts of the carbon trading price and FLs on the IES.