电网侧大规模电化学储能运行效率及寿命衰减建模方法综述

电化学储能在电力系统中扮演着重要的角色,近期对电网侧大规模电化学储能参与电力系统调度运行及控制的研究层出不穷。电化学储能的运行效率和寿命衰减特性受到储能充放电速率、充放电深度和运行温度的非线性影响,这些影响在现有的电网侧电化学储能研究中考虑的并不全面。文中介绍了锂离子电池、超级电容和全钒液流电池3种电化学储能系统的原理与特点,综述并归纳了这3种电化学储能系统运行效率的建模方法和寿命衰减的建模方法。最后,提出了电网侧大规模电化学储能系统运行效率和寿命衰减建模方法有待进一步考虑的问题,并对未来的研究方向进行了展望。

Review on Modeling Method for Operation Efficiency and Lifespan Decay of Large-scale Electrochemical Energy Storage on Power Grid Side

Electrochemical energy storage plays an important role in the power system. Recently, researches on large-scale electrochemical energy storage on power grid side participating in dispatching operation and control of power system have emerged one after another. The operation efficiency and lifespan decay characteristics of electrochemical energy storage are nonlinearly affected by the charging and discharging rate, depth of discharging and operation temperature. These effects are not comprehensively considered in the existing researches. This paper introduces the principles and characteristics of three electrochemical energy storage systems including lithium-ion batteries, supercapacitors and all-vanadium flow batteries,respectively, which focus on the classification and analysis of the modeling methods for operation efficiency and lifespan decay of these three electrochemical energy storage systems. Finally, this study proposes the key issues and potential research topics of operation efficiency and lifespan decay modeling methods for the large-scale electrochemical energy storage systems on power grid side.