Humidity in Power Converters of Wind Turbines—Field Conditions and Their Relation with Failures
| Autor: | Bernd Tegtmeier, Martin Dörenkämper, Michael Steffes, Karoline Pelka, Katharina Fischer |
|---|---|
| Přispěvatelé: | Publica |
| Rok vydání: | 2021 |
| Předmět: |
Control and Optimization
field measurement 020209 energy Energy Engineering and Power Technology 02 engineering and technology environmental impact lcsh:Technology converter power electronics wind turbines failure climatic conditions humidity temperature mission profile field measurements wind turbine Reliability (semiconductor) Power electronics 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Engineering (miscellaneous) Wind power lcsh:T Renewable Energy Sustainability and the Environment business.industry Test procedures 020208 electrical & electronic engineering Humidity Converters Power (physics) Environmental science business Energy (miscellaneous) Field conditions Marine engineering |
| Zdroj: | Energies, Vol 14, Iss 1919, p 1919 (2021) Energies; Volume 14; Issue 7; Pages: 1919 |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en14071919 |
| Popis: | Power converters in wind turbines exhibit frequent failures, the causes of which have remained unexplained for years. Field-experience based research has revealed that power- and thermal-cycling induced fatigue effects in power electronics do not contribute significantly to the field failures observed. Instead, clear seasonal failure patterns point to environmental influences, in particular to humidity, as a critical stressor and likely driver of converter failure. In addition to the electrical operating conditions, it is therefore important to also identify and characterize the climatic conditions that power converters in wind turbines are exposed to, both as a contribution to root-cause analysis and as a basis for the derivation of suitable test procedures for reliability qualification of components and systems. This paper summarizes the results of field-measurement campaigns in 31 wind turbines of seven different manufacturers spread over three continents. The temperature and humidity conditions inside the converter cabinets are characterized and related to the environmental conditions of the turbines and to their operation. The cabinet-internal climate is found to be subject to pronounced seasonal variations. In addition to the site-specific ambient climatic conditions and the operation of the turbines, the converter cooling concept is identified to significantly influence the climatic conditions inside the power cabinets. |
| Databáze: | OpenAIRE |
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