NDLI: Symmetry-analysis-based diagnosis method with correlation coefficients for open-circuit fault in inverter

Content Provider	IET Digital Library
Author	Wu, Feng Zhao, Jin Liu, Yang
Abstract	A current-based, real-time and fast symmetry-analysis-based diagnosis method with a correlation coefficient for an open-circuit fault in a voltage-source inverter is proposed. The proposed method includes three steps: data reconstruction, features extraction, fault detection and isolation. To achieve fair robustness, real-time and fast performance, sliding windows with length of a period current samples are designed for data reconstruction. Correlation coefficients of each of the two phase currents are designed to describe the symmetry of the inverter both in a healthy and a faulty condition, and mean values of current samples during a period are used to accurately isolate the faulty switch or switches. The proposed method is current-based sharing the current sensors that are used for the current regulators, hence it is low-cost. The high effectiveness and merit of the proposed method are validated by experiments.
Starting Page	1688
Ending Page	1690
Page Count	3
ISSN	00135194
Volume Number	51
e-ISSN	1350911X
Issue Number	Issue 21, Oct (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/51/21
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2015.2415
Journal	Electronics Letters
Publisher Date	2015-10-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Correlation Coefficient Current Regulators Current Sensor Current-based Sharing Data Reconstruction Electric Sensing Device Fault Detection Fault Diagnosis Fault Isolation Feature Extraction Inverter Invertors Open-circuit Fault Sensing Device And Transducers Symmetry-analysis-based Diagnosis Method
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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