Optimization Scheduling of Integrated Energy System Considering Demand Response and Coupling Degree

Demand response (DR) is an important way for demand side to participate in the flexible interaction of integrated energy system (IES). The complementary relationship among different forms of energy can be used to stimulate the flexibility of IES by co-optimizing at the consumer end, which can fully exploit the user's response ability. In order to quantitatively describe the complementarity between energy sources, the concept of coupling degree is proposed in this paper. Firstly, demand response in IES is put forward to mobilize flexibility on the demand side. Then, the concept of coupling degree is proposed in this paper to realize the quantitative modeling of the impact of energy complementarity on demand response. Therefore, an optimal operation model of IES is established to analyze the flexibility of demand response under different coupling degree. To solve the proposed model, the GAMA/IPOPT solver is used by adopting interior-point method. Finally, a typical test system is established to verify that the proposed method can effectively increase wind power consumption and reduce energy supply and use cost. With the increase of coupling degree, the flexibility of the demand response and the customer satisfaction increase and stop increasing after the inflection point.