Huacan Lv, Chengfu Wang, Yong Wang, Xi Chen, Ming Yang, Zhenwei Zhang
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The Impact of Coupling Degree on Optimal Operation of Integrated Energy System
With the increase of stochastic renewable energy, integrated energy system (IES) is regarded as a potential way to improve the utilization efficiency of energy and the operation flexibility of IES. However, the existing qualitative coupling analysis is difficult to accurately evaluate the complementary benefits brought by IES. Therefore, a definition of coupling degree between energy systems is firstly proposed to quantitatively describe the correlation feature between each subsystems in IES. Then, an optimal operation model of IES is established to analysis the impact of coupling degree on IES operated economy and reliability. In order to solve the proposed nonlinear model, the interior-point method is adopted by using GAMS/IPOPT solver. Finally, a typical test system is established to verify the validity of the proposed method. The influence of coupling degree on flexibility, economy and reliability of IES is quantitatively analyzed.
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