Multilayer SOH Equalization Scheme for MMC Battery Energy Storage System

被引：61

作者：

Ma, Zhan ^{[1
]}

Gao, Feng ^{[1
]}

Gu, Xin ^{[2
]}

Li, Nan ^{[3
]}

Wu, Qiang ^{[4
]}

Wang, Xiaohui ^{[1
]}

Wang, Xiaolong ^{[1
]}

机构：

[1] Shandong Univ, Key Lab Power Syst Intelligent Dispatch & Control, Minist Educ, Jinan 250061, Peoples R China

[2] State Grid Jinan Power Supply Co, Jinan 250000, Peoples R China

[3] State Grid Tianjin Elect Power Co, Elect Power Res Inst, Tianjin 300012, Peoples R China

[4] Shandong Univ, Sch Informat Sci & Engn, Jinan 250100, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2020年 / 35卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Batteries; State of charge; Switches; Nonhomogeneous media; Multilevel converters; Battery energy storage system (BESS); modular multilevel converter (MMC); state-of-charge (SOC); state-of-health (SOH); CONVERTER; STATE; BESS;

D O I：

10.1109/TPEL.2020.2991879

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

It is preferable for the retired batteries to balance their states-of-health (SOH) in the battery energy storage system (BESS) since it can prolong the system lifetime and reduce the maintenance burden. So far, the corresponding balancing techniques mainly focus on either the SOH balancing among packs or the SOH balancing of cells inside a pack. This article further proposes the multilayer SOH equalization scheme to equalize all cells' SOHs of large-scale BESS by comprehensively combining the pack SOH balancing strategy and the commercial cell equalization techniques. It is noted that the balancing schemes for pack and cell cannot be simply superimposed since packs and cells have totally different connection modes and are equipped with different types of balancing circuits. In specific, the modular multilevel converter (MMC) is assumed to coordinate the pack and cell SOH equalization schemes, where the charging/discharging power per submodule is properly adjusted according to the extent of cell SOH deviation and the extent of pack SOH deviation together. MATLAB simulation and experimental results of a 10-kWh MMC-BESS prototype verified the performance of the proposed method.

引用

页码：13514 / 13527

页数：14

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