中国电机工程学报2024，Vol.44Issue(6)：2374-2385,后插25,13.DOI:10.13334/j.0258-8013.pcsee.222419
三有源桥变换器开关开路故障诊断与容错运行策略
Fault Diagnosis and Tolerant Method of Open-circuit Fault for Triple Active-bridge DC-DC Converter
摘要
Abstract
As a typical multiport converter,triple active-bridge(TAB)DC-DC converter is widely used in distributed DC system.The open-circuit fault(OCF)of TAB seriously threatens the system safety operation.This article proposed an OCF diagnosis and tolerant method for TAB converter to reduce the impact of OCF.Firstly,normal mode and OCF mode of TAB are analyzed.Base on the analysis,the average value of the midpoint voltage of each bridge arm can be used as an OCF diagnosis indicator.The DC bias of transformer winding current are eliminated by blocking the gate-driving signal of the faulty bridge arm.Then the blocking mode is analyzed.Finally,fault-tolerant operation is achieved by regulating the phase shift angle range.If the OCF occurs on the DC bus side,the phase shift angle is adjusted to ensure that the DC bus still absorbs power.If the OCF occurs on the energy storage side,the phase shift angle is adjusted to ensure that the energy storage cut off.The OCF can be diagnosed accurately and quickly according to the experimental results.The impact of OCF can be reduced,which promotes the reliability of TAB converters.关键词
分布式直流系统/三有源桥变换器/开路故障/故障诊断/故障容错运行Key words
distributed DC system/triple active-bridge(TAB)converter/open-circuit fault/fault-diagnosis/fault-tolerant operation分类
信息技术与安全科学引用本文复制引用
杨伟业,马建军,朱淼,胡存刚,文书礼,刘碧..三有源桥变换器开关开路故障诊断与容错运行策略[J].中国电机工程学报,2024,44(6):2374-2385,后插25,13.基金项目
国家自然科学基金项目(51877137).Project Supported by National Natural Science Foundation of China(51877137). （51877137）
