A New Generalized Equivalent Model and State Estimation Method of Cascaded Hybrid Energy Storage System Considering Multiple Operating Modes

被引：0
|
作者：
Jiang W. [1 ]
Xue S. [1 ]
Yan X. [2 ]
Yang C. [1 ]
Zhu C. [1 ]
Zhang L. [1 ]
机构：
[1] School of Electrical Engineering, Southeast University, Nanjing, 210096, Jiangsu Province
[2] Jiangsu Oliter Energy Technology Co., Ltd, Gaoyou, 225600, Jiangsu Province
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 01期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Cascaded hybrid energy storage system; Equivalent modulation depth; Generalized equivalent model; State of charge (SOC) estimation;
D O I：
10.13334/j.0258-8013.pcsee.172322
中图分类号：
学科分类号：
摘要：
As a new topology of energy storage system, the cascaded energy storage system has the characteristics of high efficiency, high reliability and high power quality. However, it is difficult to model the cascaded energy storage system and estimate the state of charge (SOC) accurately because of the coupling of multi-energy storage components and multi-power electronic converters. The cascaded hybrid energy storage system was selected as the research object. A generalized equivalent model of cascaded hybrid energy storage system was built based on the three operating modes and the hybrid modulation method of cascaded hybrid energy storage system. As the core factor of state estimation, equivalent modulation depth was introduced. And then the index of equivalent state of charge (ESOC) was put forward to describe hybrid energy storage system under different operating conditions. The equivalent circuit model and the generalized equivalent model were built in Matlab/Simulink. At last, the effect of ESOC index under different operating modes was simulated and analyzed. © 2019 Chin. Soc. for Elec. Eng.
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页码：182 / 191
页数：9
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