Quasi-dynamic simulation of the Li-ion energy storage system capacity degradation

Li-Ion energy storage systems are currently becoming more and more interesting in terms of their application in power systems engineering. There appeared a new range of tasks that can be solved using such devices appears, i.e. the electrical energy consumption losses reduction, peak loads reduction to meet the network transmission capacity requirements, application in renewable generation systems. However, the neglection of relatively fast and irreversible aging leads to excessively optimistic economic and technical assessments of their implementation, which necessitates to make allowance for their degradation. The article provides the quasi-dynamic Li-Ion storage systems degradation simulation methodology which allows, unlike others, evaluating the aging degree for systems with uneven charge and discharge graph at the stage of preliminary analysis. The results of the methodology testing are also given.