Parallel Open-Circuit Fault Diagnosis for Cascaded Full-Bridge NPC Inverter with Carrier Phase Shifted Modulation

In this paper, a diagnosis method for open-circuit fault based on parallel operation structure is proposed for cascaded full-bridge neutral point clamped (NPC) inverter with carrier phase shifting SPWM (CPS-SPWM), which has small calculation and short diagnosis time. Multiple faulty devices with ope...

Full description

Saved in:
Bibliographic Details
Published in2024 IEEE 7th International Electrical and Energy Conference (CIEEC) pp. 3681 - 3688
Main Authors Tao, Wanyu, Wei, Xinwei, Guo, Xinyu, Ren, Chunguang, Qin, Chen, Yang, Yugang, Zhao, Xiaodan
Format Conference Proceeding
LanguageEnglish
Published IEEE 10.05.2024
Subjects
Capacitors
carrier phase shifting SPWM (CPS-SPWM)
diagnosis method
Fault diagnosis
Insulated gate bipolar transistors
Inverters
neutral point clamped (NPC) inverter
open-circuit fault
parallel control
Phase modulation
Prototypes
Voltage
Online AccessGet full text

Cover

More Information
Summary:In this paper, a diagnosis method for open-circuit fault based on parallel operation structure is proposed for cascaded full-bridge neutral point clamped (NPC) inverter with carrier phase shifting SPWM (CPS-SPWM), which has small calculation and short diagnosis time. Multiple faulty devices with open-circuit in different submodules can be diagnosed independently. The variation rules of capacitor voltage are analyzed under the normal and faulty condition. On this basis, the fault is detected quickly through the voltage deviation, and the scope of fault diagnosis is reduced to two IGBTs. Then, the faulty IGBT is located by comparing the calculated deviation and actual capacitor voltage. Finally, the feasibility and effectiveness of the proposed method is verified on the thirteen-level experimental prototype.
DOI:10.1109/CIEEC60922.2024.10583548