Results 1 to 10 of about 36,138 (185)
Harmonic Measure and Winding of Conformally Invariant Curves [PDF]
Physical Review Letters, 2002 The exact joint multifractal distribution for the scaling and winding of the electrostatic potential lines near any conformally invariant scaling curve is derived in two dimensions. Its spectrum f(alpha,lambda) gives the Hausdorff dimension of the points
A. Beurling +15 more
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Harmonic Transfers for Quantifying Propagation of Harmonics in Wind Power Plants [PDF]
Energies, 2021 In this paper, primary and secondary emissions in wind power plants are studied by using transfer admittance and current transfer functions between turbines and the public grid. The use of such transfer functions allows harmonic propagation studies without knowledge of the emission from individual turbines or the background voltage distortion.
Daphne Schwanz +3 more
openaire +2 more sources
Harmonic Current Predictors for Wind Turbines [PDF]
Energies, 2013 The harmonic impact caused by wind turbines should be carefully investigated before wind turbines are interconnected. However, the harmonic currents of wind turbines are not easily predicted due to the variations of wind speed. If the harmonic current outputs can be predicted accurately, the harmonic impact of wind turbines and wind farms for power ...
Jen-Hao Teng +3 more
openaire +2 more sources
A novel 24-slots14-poles fractional-slot concentrated winding topology with low space harmonics for electrical machines [PDF]
, 2018 This paper proposes a novel winding layout for the machines with fractional-slot concentrated windings (FSCW) using a stator shifting concept and non-overlapping windings, with which all the non-working harmonics will be completely cancelled or ...
Chuanzhi Fu +6 more
core +7 more sources
Wind inflow observation from load harmonics [PDF]
Wind Energy Science, 2017 Abstract. The wind field leaves its fingerprint on the rotor response. This fact can be exploited to use the rotor as a sensor: by looking at the rotor response, in the present case in terms of blade loads, one may infer the wind characteristics. This paper describes a wind state observer that estimates four wind parameters, namely the vertical and ...
M. Bertelè +5 more
openaire +5 more sources
Harmonics in a wind power plant [PDF]
2015 IEEE Power & Energy Society General Meeting, 2015 Wind power generation has been growing at a very fast pace for the past decade, and its influence and impact on the electric power grid is significant. As in a conventional power plant, a wind power plant (WPP) must ensure that the quality of the power being delivered to the grid is excellent.
V. Preciado +3 more
openaire +1 more source
New 5-Phase Concentrated Winding Machine with Bi-Harmonic Rotor for Automotive Application [PDF]
, 2014 For a power range from 10 to 30 kW, 5-phase machines are well adapted to low-voltage (48V) supply thanks to their reduced current per phase. For three-phase machines but with higher voltages (>120V), machines with a number of slots per pole and per phase
ASLAN, Bassel, SEMAIL, Eric
core +3 more sources
Harmonic aspects of wind power integration [PDF]
Journal of Modern Power Systems and Clean Energy, 2013 This paper discusses a number of ways in which wind power installations can impact the harmonic levels in the power system. Wind turbines are an additional source of harmonic emission, especially when it concerns “non-characteristic harmonics.” Parallel resonances can amplify the emission from individual turbines.
Math H. J. Bollen, Kai Yang
openaire +2 more sources
Are there static texture? [PDF]
, 1999 We consider harmonic maps from Minkowski space into the three sphere. We are especially interested in solutions which are asymptotically constant, i.e. converge to the same value in all directions of spatial infinity.
A. Vilenkin +13 more
core +4 more sources
A Software for the Evaluation of Winding Factor Harmonic Distribution in High Efficiency Electrical Motors and Generators. [PDF]
, 2013 In this paper a software developed for the determination of winding connections, the calculation of winding factors and the evaluation of their harmonic distribution of three and two phase windings is presented by using as input data simply the number ...
DI TOMMASO, Antonino Oscar +2 more
core +1 more source