scholarly journals Open‐circuit fault diagnosis method for three‐level neutral point clamped inverter based on instantaneous frequency of phase current

2020 ◽  
Vol 1 (3) ◽  
pp. 264-271
Author(s):  
Shuiqing Xu ◽  
Juxing Wang ◽  
Mingyao Ma
Keyword(s):  
Fault Diagnosis ◽  
Instantaneous Frequency ◽  
Open Circuit ◽  
Neutral Point ◽  
Phase Current ◽  
Diagnosis Method ◽  
Circuit Fault Diagnosis

scholarly journals An open-circuit fault-diagnosis method for inverters based on phase current

2020 ◽  
Vol 2 (2) ◽  
pp. 148-160 ◽  
Author(s):  
Shu Cheng ◽  
Jundong Zhao ◽  
Chunyang Chen ◽  
Kaidi Li ◽  
Xun Wu ◽  
...  
Keyword(s):  
Fault Diagnosis ◽  
Open Circuit ◽  
Integration Algorithm ◽  
Phase Current ◽  
Fault Features ◽  
Before And After ◽  
Power Switches ◽  
Diagnosis Method ◽  
Circuit Fault Diagnosis ◽  
The Mathematical Model

Abstract The inverter is an indispensable part of a power electronics system. Its safety and stability are important indicators for evaluating the reliability of the system. Inverter faults are usually caused by operating faults in the switch elements. This paper therefore proposes a non-intrusive fault-diagnosis method for open-circuit faults in inverter semiconductor power switches. This method requires only a current signal. It is simple and economical. Faults can be diagnosed quickly using the proposed algorithm. First, the phase current waveforms before and after the open-circuit fault are analysed based on the mathematical model. Then, based on the analysis of the phase currents, the fault features are extracted and the fault is located using the proposed integration algorithm. Finally, the effectiveness and reliability of the proposed fault-diagnosis method are verified using a hardware-in-the-loop experiment.

Open‐circuit fault diagnosis for a fault‐tolerant three‐level neutral‐point‐clamped STATCOM

2019 ◽  
Vol 12 (4) ◽  
pp. 810-816 ◽  
Author(s):  
Haoyang Li ◽  
Yuanbo Guo ◽  
Jinhui Xia ◽  
Ze Li ◽  
Xiaohua Zhang
Keyword(s):  
Fault Diagnosis ◽  
Fault Tolerant ◽  
Open Circuit ◽  
Neutral Point ◽  
Circuit Fault Diagnosis
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