Models of wind-turbine main shaft bearings for the development of specific lightning protection systems
One of the main cause of damages for wind turbine power plants is certainly constituted by lightning. Direct and indirect events can indeed produce damages and malfunctions of electrical and mechanical components. Concerning mechanical components, blades and bearings are the most involved parts. In particular, lightning-damages produced at bearings positioned at the mechanical interface between rotating parts of the wind turbine, can result in high costs, considering the difficulties involved in the replacement of such components. The paper presents a numerical and an analytical model of wind turbine main shaft bearings aimed at calculate their electrical impedance along with their experimental validation. These models provide useful criteria for the design of wind turbines lightning protection systems (LPS). In this respect, the paper presents also the development of a specific LPS for the protection of wind turbine bearings and the relevant effectiveness analysis obtained by means of experimental tests. ©2007 IEEE.
2-s2.0-50849110129
2007
2007 IEEE Lausanne POWERTECH
783
789
Department of Electrical Engineering, University of Bologna, Italy Department of Electrical Engineering, University of Rome 'La Sapienza', Italy Leitner S.p.A., Italy
Conference code: 73346
Export Date: 25 April 2012
Source: Scopus
Art. No.: 4538415
doi: 10.1109/PCT.2007.4538415
Language of Original Document: English
Correspondence Address: Paolone, M.; Department of Electrical Engineering, University of BolognaItaly; email: mario.paolone@mail.ing.unibo.it
References: Cotton, I., Jenkins, N., Hatziargyriou, N., Lorentzou, M., Haigh, S., Hnacock, M., Lightning Production of wind turbines (1999) A designers guide to best practice, , First edition; Sorensen, T., Jensen, F.V., Raben, N., Lykkegaard, J., Saxov, J., Lightning protection for offshore wind turbines (2001) Proc. Of the CIRED 16th International Conference and Exhibition on Electricity Distribution, 4. , IEE Conf. Publ. No. 482, 18-21 June; A. Kern and F. Krichel, Considerations about the lightning protection system of mains independent renewable energy hybrid-systems - practical experiences, Journal of Electrostatics, 60, Issues 2-4, March 2004, pp. 257-263O. Celi, A. Pigini, Evaluation of Damage Caused by Lightning Current Flowing Through Bearing, IEA: Lightning Protection of Wind Turbine Generator Systems and EMC Problems in the Associated Control System. Pp. 85-94, IEA Annex XI, 26th Meeting of Experts, Cologne Monzese, Milan, Italy, March 8-9, 1994Protection against lightning electromagnetic impulse, Part 1, General principles (1995), IEC 61312-1Protection of structure against lightning - Part 1: General principles 1° Ed (1990), IEC 61024-1Protection of structure against lightning - Part 1: General principles - Section 1: Guide A: Selection of protection levels for lightning protection systems ed (1998), IEC 61024-1-1Protection of structures against lightning - Part 1: General principles - Section 2: Guide B: Design, installation, maintenance and inspection of lightning protection systems (1998), IEC 61024-1-2Protection against lightning electromagnetic impulse, Part 1: General principles (1995), IEC 61312-1Protection against lightning electromagnetic impulse, Part 2: Shielding of structures, bonding inside structures and earthing (1997), IEC 61312-2First edition, Protection against lightning electromagnetic impulse (LEMP) - Part 3 Requirements of surge protective devices (1999), IEC 61312-3:, SPDsIEC TR2 61662 Assessment of the risk of damage due to lightning 04-1995Ed.1: Protection against lightning-Part Part 1: General principles (2006), IEC 62305-1Ed.1: Protection against lightning-Part 2: Risk management (2006), IEC 62305-2Ed.1: Protection against lightning-Part 3: Physical damages to structures and life (2006), IEC 62305-3, hazardEd.1: Protection against lightning-Part 4: Electrical and electronic systems within structures (2006), IEC 62305-4Wind Turbine Generator System (1999), IEC 61400-24Dowson, D., Higginson, G.R., (1977) Elasto-Hydrodinamic lubrification, , Pergamon Press; (1994) Modeling Guide, , FEMLAB, Comsol AB, Sweden
Sponsors: The Institute of Electrical and Electronics Engineers; Power and Electronics Society
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