Lightning Damage to Wind TurbineBlades From Wind Farms in the U.S

Autor: Anna Candela Garolera, Soren Find Madsen, Maya Nissim, Jackson D. Myers, Joachim Holboell

Publikováno v: IEEE Transactions on Power Delivery. 31:1043-1049

This paper presents statistical data about lightning damage on wind turbine blades reported at different wind farms in the U.S. The analysis is based on 304 cases of damage due to direct lightning attachment on the blade surface. This study includes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e330c81d948cf6f58862e49e63a7e941
https://doi.org/10.1109/tpwrd.2014.2370682

Thermal Ageing of XLPE Cable Insulation under Operational Temperatures – Does It Exist?

Autor: Mogens Henriksen, Rasmus Schmidt Olsen, Joachim Holboell, Jens Z. Hagen

Publikováno v: Proceedings of the Nordic Insulation Symposium.

Thermal ageing of power cables may cause premature breakdown if the cables are operated at elevated temperatures, a relation usually described by Arrhenius’ law. The purpose of the present study is to investigate if any significant ageing takes pla

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::81de267c05f00cf227356b6581abf101
https://doi.org/10.5324/nordis.v0i23.2454

Multiple Lightning Discharges in Wind Turbines Associated With Nearby Cloud-to-Ground Lightning

Autor: Anna Candela Garolera, Kenneth L. Cummins, Soren Find Madsen, Joachim Holboell, Jackson D. Myers

Publikováno v: IEEE Transactions on Sustainable Energy. 6:526-533

This paper presents the analysis of five events where simultaneous lightning currents were registered in different wind turbines of a wind farm with lightning monitoring equipment installed. Measurements from current monitoring devices installed at t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aaf1c2ea5eb277ef9e16c739b02023bd
https://doi.org/10.1109/tste.2015.2391013

Diagnosis of bearing creep in wind turbine gearboxes

Autor: Georgios Alexandros Skrimpas, Zhenyan Liu, Reynir Hilmisson, Christian Walsted Sweeney, Joachim Holboell

Publikováno v: Skrimpas, G A, Liu, Z, Hilmisson, R, Sweeney, C W & Holbøll, J 2016, Diagnosis of bearing creep in wind turbine gearboxes . in Third European Conference of the Prognostics and Health Management Society 2016 . Third European Conference of the Prognostics and Health Management Society, Bilbao, Spain, 05/07/2016 .
Technical University of Denmark Orbit

One of the most wide spread gearbox topologies in the wind energy sector consists of a slow rotating planetary stage, an intermediate speed parallel stage and finally a high speed parallel stage driving the generator rotor. The shafts of the two latt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::4da95978c9ce87ee622d535d23a89d40
https://orbit.dtu.dk/en/publications/830d3c66-4d60-4421-a046-4156c2319978

High frequent modelling of a modular multilevel converter using passive components

Autor: Walid Ziad El-Khatib, Joachim Holboell, Tonny Wederberg Rasmussen

Publikováno v: El-Khatib, W Z, Holbøll, J & Rasmussen, T W 2013, High frequent modelling of a modular multilevel converter using passive components . in Proceedings of IPST 2013 . IEEE, International Conference on Power Systems Transients, Vancouver, British Columbia, Canada, 18/06/2013 .
Technical University of Denmark Orbit

Prevalence of High Voltage direct current (HVDC) based on Voltage source converters (VSC) has made it necessary to investigate the behavior of the converter under various fault conditions. In this paper we will deal with the transient characteristics

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::96c828f886b03cde0546ce2aa82ccece
https://orbit.dtu.dk/en/publications/f5bb8b76-ea01-4b3e-8d96-61081bff5351