LIU Liu, WANG Dan, JIA Hongjie, WANG Weiliang, ZHI Yunqiang, MENG Zhengji, ZHOU Bingyu
ABSTRACT： The interactions in integrated energy distribution system (IEDS) becomes intimate and the coupling relationship is complicated. Energy storage is the key to realize economic and stable operation of IEDS. The investment of traditional energy storage is often high, and the network-level large-scale storage hasn’t been widely used because of the limitation by geographical, physical, economic and other factors. In view of the above problems, this paper focuses on flexible coupling and multi energy complementary features of IEDS between electricity and natural gas. A model of generalized multi-source energy storage (GMSES) is proposed by the optimization of IEDS muti energy flow and the comprehensive utilization of IEDS network resources. Without changing the network structure of IEDS and adding investment in energy storage equipment, GMSES could realize a network-level charging/discharging energy storage, as well as the energy optimization management. Finally, based on the consideration of energy flow and devices constraints, an specific example is given to study energy optimization method of GMSES and verify that the GMSES model can effectively improve the system economy. Simultaneously, GMSES also has the potential to stabilize the volatility of renewable energy.
