Economic dispatching of multi-region interconnected integrated energy system considering demand response

In order to reduce the curtailment of renewable energy and carbon emissions in integrated energy system(IES), a dispatch method that accounts for demand response from the user side within multi-region IES is proposed. This method incorporates time-of-use electricity tariffs and tiered heating subsidies, with the objective of minimizing the total operational cost of the system, thus establishing a multi-region IES dispatch model that includes demand response. The model is solved using a scaled version of the Alternating Direction Method of Multipliers (ADMM) alongside the Gurobi optimizer. The results of simulation case studies suggest that the multi-region interconnected pattern assists in peak shaving and valley filling for sub-regions with varying contributions from wind and solar power, thereby improving the intake rate of renewable energy. Mechanisms for demand response that take into account time-of-use electricity tariffs and tiered heat subsidies have proven to be effective in leveling out fluctuations in load-side energy usage, lowering the overall carbon emissions of the system, and enhancing both its economic efficiency and low-carbon attributes. The subsidy scheme proposed in this article, compared to the scenarios without subsidies and with flat-rate subsidies, results in a respective reduction in total system cost by 2.48% and 2.05%; the total carbon emissions are reduced by 1,128 t and 1,331 t; moreover, the rate of renewable energy curtailment decreases from 6.69% to 0.49%.