Converter Monitoring Unit for Retrofit of Wind Power Converters

Bjorn Rannestad, Anders Eggert Maarbjerg, Kristian Frederiksen, Stig Munk-Nielsen, Kristian Gadgaard

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

16 Citationer (Scopus)

Abstract

A converter monitoring unit (CMU), which will enable condition monitoring of wind turbine converters is presented in this paper. Reducing the cost of corrective maintenance by means of condition monitoring is a way of lowering operation and maintenance costs for wind turbine systems. The CMU must be able to detect a broad range of failure modes related to Insulated Gate Bipolar Transistor (IGBT) power modules and associated gate drives. IGBT collector-emitter on-state voltage (vce on) and current (i c) is sampled in the CMU and used for detection of emerging failures. A new method for compensation of unwanted inductive voltage drop in the vce on measurement path is presented, enabling retrofitting of CMUs in existing wind turbines. Finally, experimental results obtained on a prototype CMU are presented. Experimentally the vce on dependency to IGBT junction temperature and deterioration of gate drive voltage is investigated. The proposed method shows good detectability of both thermally related degradations of the power module and detectability of deterioration of gate drive voltage. It is also expected that the proposed method will enable detectability of other failure mechanisms.

OriginalsprogEngelsk
Artikelnummer7953522
TidsskriftIEEE Transactions on Power Electronics
Vol/bind33
Udgave nummer5
Sider (fra-til)4342 - 4351
Antal sider10
ISSN0885-8993
DOI
StatusUdgivet - maj 2018

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