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Open-circuit fault diagnosis and maintenance in multi-pulse parallel and series TRU topologies

Author: Saura, J.; Bakkar, M.; Bogarra, S.

Type of activity: Journal article
Journal: IEEE transactions on power electronics
Date of publication: 2020-02-27
Volume: 35
Number: 10
First page: 10906
Last page: 10916
DOI: 10.1109/TPEL.2020.2976895
Project funding: Stability of MVDC grids integrating renewable energy technologies, energy storage systems and impedance-source converters

Repository: http://hdl.handle.net/2117/330181
URL: https://ieeexplore.ieee.org/abstract/document/9016138
Abstract: Transformer Rectifier Units (TRUs) are a reliable way for DC generation in several electric applications. These units are formed by multiple three-phase uncontrolled bridge rectifiers connected according to two main topologies (parallel and series), and fed by a phase-shifting transformer, which can have different configurations. Fault diagnosis of the uncontrolled bridge rectifier diodes is one of the most important concerns on the electronic devices, nonetheless, rectifier units are inherently...

Transformer Rectifier Units (TRUs) are a reliable way for DC generation in several electric applications. These units are formed by multiple three-phase uncontrolled bridge rectifiers connected according to two main topologies (parallel and series), and fed by a phase-shifting transformer, which can have different configurations. Fault diagnosis of the uncontrolled bridge rectifier diodes is one of the most important concerns on the electronic devices, nonetheless, rectifier units are inherently not protected in front of Open-Circuit (O/C) faults, which cause malfunction and performance deterioration. In order to solve this drawback, the proposed fault diagnosis method is based on the O/C fault signature observed in the DC-link output voltage of TRUs rectifier. It allows detecting the O/C diodes of parallel and series TRUs with different phase-shifting transformer configurations and for the most usual fault scenarios. Moreover, it also helps the prediction of diodes that could be exposed to failure after the fault, which provides corrective maintenance for the TRU development. The proposed method is illustrated from MATLABTM numerical simulations of a 12-pulse TRU, and is validated with experimental tests. ©2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Citation: Saura, J.; Bakkar, M.; Bogarra, S. Open-circuit fault diagnosis and maintenance in multi-pulse parallel and series TRU topologies. "IEEE transactions on power electronics", 27 Febrer 2020, vol. 35, núm. 10, p. 10906-10916.
Keywords: Condition monitoring, Fault diagnosis, Opencircuit (O/C) faults, Three-phase uncontrolled bridge rectifier, Transformer rectifier unit (TRU)

Group of research: QSE - Power Quality

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