References of "Lilien, Jean-Louis"
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See detailWind turbines turbulence effects on cable structures in their vicinity
Lilien, Jean-Louis ULg; keutgen, Renaud; raimarckers, Nicolas

in Proceedings of the ISCD 2001 (2001, May)

Actual wind turbines size can be as large as 80 meters diameter (1 MW and over). Behind the wind turbines, mean wind speed is sensibly reduced (approximately 50%) and turbulence severely increased. The ... [more ▼]

Actual wind turbines size can be as large as 80 meters diameter (1 MW and over). Behind the wind turbines, mean wind speed is sensibly reduced (approximately 50%) and turbulence severely increased. The spectral density power of disturbed wind can be assumed similar to classical wind but centred on the rotational speed of the motor. Due to classical speed and shape of wind turbine, corresponding key frequency for disturbed wind is close to one Hz. Any structure in the vicinity of wind turbine can be disturbed by the new wind spectrum created by the turbine, thus existing most of the time for wind speed up to 25 m/s. Cable structure, f.e. overhead lines, have clearly 1 Hz in their first modal shapes. This make them very sensible to buffeting due to the disturbed wind induced by the turbine. Due to continuous excitation, most of the year, fatigue may occur near clamping point and extra damping may be required as well as minimum distance from the wind turbine may be recommended. The anchoring tower (whose first eigenfrequency is generally close to 1 Hz for high voltage lines) will also be affected. This paper will present some simulations of overhead lines disturbances induced by wind turbine in their vicinity. The power spectral density of wind behind the turbine will be deduced from classical spectra of Davenport, but with adaptation due to the rotation of the turbine. Effects on cable will be shown and tentative recommendations of damping as well as clearances from the turbine will be suggested. [less ▲]

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See detailReview of galloping control methods
Lilien, Jean-Louis ULg

in Electra (2000), 191

A review of anti-galloping control methods.

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See detailCalculation of spacer compression for bundle lines under short-circuit.
Lilien, Jean-Louis ULg; papailiou, Konstantin

in IEEE Transactions on Power Delivery (2000), 15(N°2), 839-845

Short-circuit tests results and proposal of a new method to improve Manuzio formula on bundle conductors spacer compression.

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See detailGalloping data base on single and bundle conductors prediction of maximum amplitudes
Lilien, Jean-Louis ULg; Havard, Dave

in IEEE Transactions on Power Delivery (2000), 15(N°2), 670-674

A data base of 166 cases has been analysed to produced formula to predict galloping amplitudes on power lines either for single conductor of bundle conductor lines.Calculation enhanced the prediction for ... [more ▼]

A data base of 166 cases has been analysed to produced formula to predict galloping amplitudes on power lines either for single conductor of bundle conductor lines.Calculation enhanced the prediction for single conductors but predict larger amplitudes for bundle. [less ▲]

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See detailSpacer Compression for a tripple conductor bundle
Lilien, Jean-Louis ULg; Hansenne, Eric; Papailiou, Konstantin et al

in IEEE Transactions on Power Delivery (2000), 15(N°1), 236-241

Spacer compression analysis based on tests and proposed simple method

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See detailBenchmark cases for galloping with results obtained from wind tunnel facilities. Validation of a finite element model.
keutgen, Renaud; Lilien, Jean-Louis ULg

in IEEE Transactions on Power Delivery (2000), 15(N°1), 367-374

Wind tunnel galloping are made available with all data (aerodynamics, amplitudes) to check any model.

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See detailNon linear finite element modelling of the aeroelastic behaviour of a cable stayed structure
raimarckers, Nicolas; Lilien, Jean-Louis ULg

in Proceedings of the 3d ISCD 1999 (1999, August)

The importance of cable dynamics in the whole structure behaviour is highlighted by a finite element approach.Including wind turbulence modelisation.

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See detailTransmission line torsional stiffness. Confrontation of field-tests line and finite element simulations.
keutgen, Renaud; Lilien, Jean-Louis ULg; Yukino, Teruhiro

in IEEE Transactions on Power Delivery (1999), 14(N°2), 567-578

Bundle torsional stiffness, Full scale field tests on a quad bundle compared to a finite element stiffness and simplified model.

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See detailA new theory for torsional stiffness of multi-span bundle overhead transmission lines.
Wang, Jianwei; Lilien, Jean-Louis ULg

in IEEE Transactions on Power Delivery (1998), 13(N°4), 1405-1411

A new theory for torsional stiffness of multi-span bundle overhead lines is presented.

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See detailOverhead electrical transmission line galloping.
wang, jianwei; Lilien, Jean-Louis ULg

in IEEE Transactions on Power Delivery (1998), 13(N°3), 909-916

A full multi-span 3 degree of freedom iced transmission line model is presented.

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See detailA new damper to solve galloping on bundled lines. Theoretical background, laboratory and field results.
keutgen, Renaud; Lilien, Jean-Louis ULg

in IEEE Transactions on Power Delivery (1998), 13(N°1), 260-265

A new kind of anti-galloping device for bundled lines is presented.

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See detailGalloping of electrical lines in wind tunnel facilities
Chabart, Olivier; Lilien, Jean-Louis ULg

in Journal of Wind Engineering & Industrial Aerodynamics (1998), 74-76

Galloping on power lines is a difficult matter. In this paper a galloping has been reproduced in a wind tunnel on a section of an actual conductor with actual ice shape. Aerodynamics is first detailed ... [more ▼]

Galloping on power lines is a difficult matter. In this paper a galloping has been reproduced in a wind tunnel on a section of an actual conductor with actual ice shape. Aerodynamics is first detailed. Then flutter type and Den Hartod type galloping has been obtained in the wind tunnel depending on changeable ratio vertical to torsional frequencies. [less ▲]

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See detailOverhead line galloping : Field experience during one event in Belgium on February 13th, 1997
Lilien, Jean-Louis ULg; Erpicum, Michel ULg; Wolfs, M.

in IWAIS '98, International Conference, Reykjavik,June 1998, Proceedings (1998)

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See detailOverhead Lines galloping and turbulent wind
Chabart, Olivier; Lilien, Jean-Louis ULg

in Bulletin Scientifique de l'Association des Ingénieurs Electriciens sortis de l'Institut Electrotechnique Montefiore (1997), 1

Galloping is modelled considering actual turbulent wind using frequency spectrum of the wind and spatial coherence.

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See detailDynamic loads caused by lightning stroke in a conductor angle arrangement.
Lilien, Jean-Louis ULg; hansenne, eric; Kokkinos, D. et al

in Proceedings of teh 23rd ICLP (1996, September)

Lightning stroke going through condutor angle may cause dramatic failure of the conductors if mechanical loads are not taken into account in the design.The paper evaluate such effects by simulation and ... [more ▼]

Lightning stroke going through condutor angle may cause dramatic failure of the conductors if mechanical loads are not taken into account in the design.The paper evaluate such effects by simulation and make some proposal to reduce the maximum stress. [less ▲]

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See detailShort-circuit electrodynamic effects on multiconductors bundled.
Lamchich, Moulay; Lilien, Jean-Louis ULg; el Adnani, Mustapha

in Proceedings of the 7th ESCC (1996, September)

Budle conductor during short-circuit behaves with a clash inducing large loads on structures, so called "pinch effect". This paper looks after simulations, tests and simple method to better understand the ... [more ▼]

Budle conductor during short-circuit behaves with a clash inducing large loads on structures, so called "pinch effect". This paper looks after simulations, tests and simple method to better understand the physics behind the general behaviour of bundle conductors. [less ▲]

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See detailAn analytical-numerical method based on static equivalent load for the evaluation of maximum dynamic stresses in HV Substation.
Miri; Kuhner, A.; Lilien, Jean-Louis ULg et al

in Proceedings of the 7th ESCC (1996, September)

Short-circuit mechnaical effects in substations may be analysed by numerical methods. It helps to better define equivalent static loads qhich may be used for design of supporting structures during such ... [more ▼]

Short-circuit mechnaical effects in substations may be analysed by numerical methods. It helps to better define equivalent static loads qhich may be used for design of supporting structures during such dynamic loading. [less ▲]

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See detailOscillations of bride stay cables induced by periodic motions of deck and/or towers
Pinto da Costa, Antonio; Martins, Joao; Branco, F. et al

in Journal of Engineering Mechanics (1996), 122(7), 613-622

Cables in stayed bridges may oscillate due to periodic motions of the deck or tower induced by wind or traffic.

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See detailThe mechanical effects of short-circuit currents in open air substations (Rigid and Flexible bus-bars)
Lilien, Jean-Louis ULg; declercq, Guy; El Adnani, Mustapha et al

Book published by CIGRE (1996)

A full revision of the 1987 version of the same brochure,including new development on bundle conductors and a full data base of tests.It includes short-circuit mechanical effects in substations for AC and ... [more ▼]

A full revision of the 1987 version of the same brochure,including new development on bundle conductors and a full data base of tests.It includes short-circuit mechanical effects in substations for AC and DC structures, for rigid and flexible busbars. [less ▲]

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See detailShort-circuit mechanical effects on open-air substation structures and apparatuses. The equivalent static load(ESL).
Lilien, Jean-Louis ULg; Hansenne, Eric

in Proceedings of the 7th ESCC (1996)

SHort-circuit in substation with flexible bus-bars may induce dropper stretch. The design of supporting apparatuses (isolator) must take into account the dynamic effect of the load. This paper suggest to ... [more ▼]

SHort-circuit in substation with flexible bus-bars may induce dropper stretch. The design of supporting apparatuses (isolator) must take into account the dynamic effect of the load. This paper suggest to include in the design the "equivalent static load". [less ▲]

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