Dynamic Thermal Analysis of DFIG Rotor-side Converter during Balanced Grid Fault

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Abstract

Ride-through capabilities of the Doubly-Fed Induction Generator (DFIG) during grid fault have been studied a lot. However, the thermal performance of the power device during this transient period is seldom investigated. In this paper, the DFIG performance in terms of the stator flux evolution and the rotor voltage during the balanced grid fault is firstly addressed. By using the traditional demagnetizing control, the damping of the stator flux and the safety operation area are theoretically evaluated with various amounts of demagnetizing current. It is observed that the higher demagnetizing current leads to faster stator flux damping and lower induced rotor voltage, but it brings higher loss as well as the thermal cycling of the power device. Based on the simulation of the stator flux evolution and the thermal behavior of each power semiconductor, it is concluded that there is a trade-off in selection of the demagnetizing current coefficient, and it should be jointly decided by the suitable transient period and reliable operation of the power device.
Original languageEnglish
Title of host publicationProceedings of the 2014 IEEE Energy Conversion Congress and Exposition (ECCE)
Number of pages7
PublisherIEEE Press
Publication dateSept 2014
Pages3097-3103
DOIs
Publication statusPublished - Sept 2014
Event2014 IEEE Energy Conversion Congress and Exposition (ECCE) - Pittsburgh, Pittsburgh, United States
Duration: 14 Sept 201418 Sept 2014

Conference

Conference2014 IEEE Energy Conversion Congress and Exposition (ECCE)
LocationPittsburgh
Country/TerritoryUnited States
CityPittsburgh
Period14/09/201418/09/2014

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