NDLI: Three-phase qZ-source inverter with fault tolerant capability

Content Provider	IET Digital Library
Author	Pires, Vitor Fernão Foito, Daniel Cordeiro, Armando
Abstract	The requirement of three-phase inverters with high reliability capability is considered important in several applications. Most of the adopted fault-tolerant solutions use classical three-phase voltage source inverters (VSI) with redundant controlled power devices or modified control strategies for acceptably degraded performance in the event of a failure yielding the loss of devices. This work proposes the use of a fault-tolerant converter based on the quasi-Z-source inverter (qZSI). This inverter presents important features such as boost capability and not requires dead time circuits. These features associated to the proposed topology results in a converter with high reliability and fault-tolerant capability. The proposed topology is designed to allow the reconfiguration of the converter after a power switch failure, using only two legs in the faulty mode. Additionally, this topology avoids extra inductors, capacitors and active power switches for the fault-tolerant condition. A current controller associated to a vectorial voltage modulator is used to control the proposed topology, which results in three-phase balanced AC currents with reduced total harmonic distortion even in faulty condition. The performance of this solution is confirmed through experimental results obtained from a laboratory prototype.
Starting Page	1852
Ending Page	1858
Page Count	7
ISSN	17554535
Volume Number	10
e-ISSN	17554543
Issue Number	Issue 14, Nov (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/10/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2016.0878
Journal	IET Power Electronics
Publisher Date	2017-07-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Power Switches Capacitor Classical Three-phase Voltage Source Inverters Closed Loop System Closed-loop Current Controller Control of Electric Power System Current Control Electric Current Control Failure Analysis Fault Tolerance Fault-tolerant Converter Inductor Invertors Modified Control Strategy Open-circuit Power Switch Failure QZSI Redundant Controlled Power Device Reliability Switching Converter Three-phase Balanced AC Current Three-phase QZ-source Inverter Total Harmonic Distortion Vectorial Voltage Modulator Voltage-source Converter
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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