首页|A Novel Fault-Tolerant Operation Approach for Cascaded H-Bridge Converter-Based Battery Energy Storage Systems to Avoid Overcharge

A Novel Fault-Tolerant Operation Approach for Cascaded H-Bridge Converter-Based Battery Energy Storage Systems to Avoid Overcharge

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  • NETL
  • NSTL
  • IEEE
Conventional fundamental frequency zero-sequence voltage (FFZSV) injection-based fault-tolerant operation methods cause power reversion under submodule (SM) failure conditions with low-power factor, which leads to overcharge risk in the cascaded H-bridge converter-based battery energy storage system (CHB-BESS). To solve this issue, a novel fault-tolerant operation approach has been proposed for the CHB-BESS. First, the power reversion mechanism and overcharge risk are analyzed with the conventional FFZSV injection-based methods. On this basis, the operation conditions of the CHB-BESS are divided into three stages according to the safe FFZSV injection region, the FFZSV is modified, and the negative sequence current is injected when necessary. As a result, the power flow of battery packs among the three phases can maintain the same direction, and the power reversion and overcharge risk can be avoided. Experimental results under various conditions verify that the proposed fault-tolerant operation approach of the CHB-BESS can achieve uninterrupted operation and avoid overcharge risk.

Fault tolerant systemsFault toleranceBatteriesVoltageState of chargeTopologyHarmonic analysisCapacitorsVoltage controlSafety

Qian Xiao、Haolin Yu、Yu Jin、Hongjie Jia、Yunfei Mu、Huiqiao Liu、Wenhua Li、Remus Teodorescu、Frede Blaabjerg

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Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin, China|State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin, China

Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin, China

State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin, China

Aalborg University, Aalborg, Denmark

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2025

10.1109/TIE.2024.3485716

IEEE transactions on industrial electronics: Institute of Electrical and Electronics Engineers transactions on industrial electronics

IEEE transactions on industrial electronics: Institute of Electrical and Electronics Engineers transactions on industrial electronics

ISSN：
年,卷(期)：2025.72(6)
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