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Optimal Dispatch of Integrated Energy System Considering Complementary Coordination of Electric/Thermal Energy Storage |
Diao Hanbin1, Li Peiqiang1, Wang Jifei2, Wang Dan2, Li Zhensheng2 |
1. ollege of Electrical and Information Engineering Hunan University Changsha 410082 China; 2. State Grid Zhangjiakou Power Supply Company Zhangjiakou 075000 China |
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Abstract Aiming at the optimal scheduling problem of integrated energy system with energy storage, the optimal scheduling method of integrated energy system is proposed from the perspective of complementary coordination of electricity and heat energy storage. Considering the heat storage characteristics of the heat network and the node state constraints such as the voltage and temperature of the energy supply network, a integrated energy system model is established; the complementary coordination relationship of three types of energy storage, i.e. the electric energy storage connected to the new energy, the thermal energy storage connected to the cogeneration, and the thermal energy storage connected to the electric heating equipment, is analyzed under the scenarios of new energy consumption and peak load reduction; and on this basis, a optimal scheduling model is established. The optimal scheduling model of the system, through simplifying the heat network model, introducing 0-1 variable, big M method and other methods to deal with the nonlinear terms in the model, and using GAMS to model and solve. Finally, taking IEEE 33 node distribution network and 45 node heat network coupling system as an example to analyze. The results show that the coordinated operation of electric energy storage and thermal energy storage can effectively absorb the waste power of new energy and reduce the peak load of electric power, and realize the complementary advantages of multi energy storage.
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Received: 18 October 2019
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