Modeling and Reliability Analysis of Lithium Battery Energy Storage System Based on Differential Power Conversion

被引：0
|
作者：
Zheng K. [1 ]
Zhang W. [1 ]
Deng Y. [2 ]
Wu X. [1 ]
Jing L. [1 ]
Sun B. [1 ]
Yan T. [3 ]
机构：
[1] National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Haidian District, Beijing
[2] China Railway Group Dalian Locomotive & Rolling Stock Co., Ltd., Liaoning Province, Dalian
[3] Tongzhou Power Supply Company, State Grid Beijing Electric Power Company, Tongzhou District, Beijing
来源：
Dianwang Jishu/Power System Technology | 2023年 / 47卷 / 07期
关键词：
bidirectional full bridge phase shift converter; differential power energy storage system; isolated DC-DC converter; Lithium-ion battery;
D O I：
10.13335/j.1000-3673.pst.2022.1302
中图分类号：
学科分类号：
摘要：
Compared with the traditional full power direct current (DC) conversion scheme of the battery energy storage system (BESS), the differential power conversion framework can reduce the design capacity, cost and operation loss of the power converter, and improve the energy storage capacity of lithium batteries. The existing research on differential power energy storage system is mainly limited to the functional verification level, and there is less research on the theoretical model and reliability of differential power conversion. Therefore, according to the operation principle of the converter and the voltage range of lithium battery, this paper quantitatively analyzes the capacity design range of differential power converter. Then, the steady-state circuit model and frequency domain model are established to analyze the controllability and dynamic characteristics of the system. On this basis, a reliability model is established to calculate the average failure time (MTTF) of energy storage systems with different schemes and evaluate the reliability difference. The simulation results show that the reliability of differential power energy storage scheme is higher than that of full power DC conversion energy storage scheme. Finally, a 24V differential power energy storage system prototype of a single battery based on phase-shifting full bridge (PSFB) bidirectional DC-DC converter is developed. The dynamic characteristics and operation stability of the differential power energy storage system are verified through 10A constant current charge and discharge experiment. © 2023 Power System Technology Press. All rights reserved.
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页码：2630 / 2638
页数：8
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