User Side Energy Storage State Evolution Model for Abnormal Operation Scenarios in Distribution Networks

Under the background of the dual carbon policy, user side energy storage has been widely applied. During the operation of the power system, the stability of the distribution network is directly related to the quality of energy storage on the end user side. Once a fault occurs, it not only affects production and living order, but may also cause serious accidents such as overheating and loss of control, resulting in irreversible losses. Therefore, this article proposes a user side energy storage state evolution model for abnormal operation Scenarios in distribution networks. Firstly, the disturbance events that affect the safe operation of energy storage on the user side in the distribution network were sorted out. Secondly, study the changes in the operational status of user side energy storage systems under different abnormal operating scenarios, and explore the transmission path of abnormal electrical quantities from distribution networks to user side energy storage. Furthermore, a state evolution model for user side energy storage operation under distribution network faults is established, and the safe operating boundary of the user side energy storage system under stable conditions of the distribution network system is obtained. Finally, the triggering conditions for user side energy storage failure protection and lithium battery thermal runaway were extracted through simulation experiments.