电力系统保护与控制2025，Vol.53Issue(2)：27-37,11.DOI:10.19783/j.cnki.pspc.240635
基于切换调制策略的ANPC三电平逆变器开路故障诊断方法研究
Research on open-circuit fault diagnosis method of ANPC three-level inverter based on switching modulation strategy
摘要
Abstract
Since switching device faults are the main type of faults in active neutral point clamped(ANPC)three-level inverters,quickly locating the faulty devices is of great significance to improve the reliability of ANPC three-level inverters.For open-circuit faults of switching devices in ANPC three-level inverters,the impact of switching device faults on output current under different modulation algorithms and the influence of the phase difference between output current and load-side voltage on fault current waveform are analyzed from the perspective of propagation paths.Using the three-phase output current as the fault characteristic quantity,an open-circuit fault diagnosis method for ANPC three-level inverters based on switching modulation strategy is proposed.The current averaging method is used to initially determine the approximate range of the faulty switching device,and then the switching modulation strategy is used to precisely locate the faulty device.Finally,simulations and experiments verify that the method can locate faults within one fundamental waveform cycle,with advantages of fast detection speed,strong anti-interference ability,and no need for additional sensors for fault detection.关键词
ANPC三电平逆变器/切换调制策略/开路故障/故障诊断Key words
ANPC three-level inverter/switching modulation strategy/open-circuit fault/fault diagnosis引用本文复制引用
陈怡薇,徐永海,袁敞,宋昕一,孙曙光..基于切换调制策略的ANPC三电平逆变器开路故障诊断方法研究[J].电力系统保护与控制,2025,53(2):27-37,11.基金项目
This work is supported by the National Key Research and Development Program of China(No.2021YFB2601403). 国家重点研发计划项目资助(2021YFB2601403) （No.2021YFB2601403）
