广义多源储能系统综合建模与能量优化分析

摘要

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.%综合能源配电系统(integrated energy distribution system,IEDS)中能量交互密切,能源耦合关系复杂,储能是其经济与稳定运行的关键环节.传统储能往往费用较高,且网络级大规模储能受限于地理环境、物理状态、经济条件等因素而未能广泛应用.针对上述问题,该文利用电力与天然气的灵活耦合与多能互补特性,通过对IEDS多能流优化调度与网络侧资源综合利用,提出了一种广义多源储能系统(generalized multi-source energy storage,GMSES)模型,可以在不改变IEDS网络结构、不新增储能设备的基础上,实现GMSES网络级储能充、放电功能与能量优化管理.在综合考虑能量流和设备约束的基础上,该文结合具体算例,探究了GMSES能量优化方法,验证了GMSES模型可有效提高系统经济性,并具有平抑可再生能源波动的潜力.