نتایج جستجو برای: nrel
تعداد نتایج: 434 فیلتر نتایج به سال:
This paper presents a newly developed aero-servo-elastic platform for implementing smart rotor control and shows its effectiveness with aerodynamic loads on large-scale offshore wind turbines. The platform was built by improving the FAST/Aerodyn codes with the integration of an external deformable trailing edge flap controller in the Matlab/Simulink software. Smart rotor control was applied to ...
This work is part of the inter-laboratory collaboration to study the stability of seven distinct sets of state-of-the-art organic photovoltaic (OPVs) devices prepared by leading research laboratories. All devices have been shipped to and degraded at the Danish Technical University (DTU, formerly RISO-DTU) up to 1830 hours in accordance with established ISOS-3 protocols under defined illuminatio...
I present evidence in this paper for a universal preference for clause-initial adverbial subordinators (subordinate conjunctions marking subordinate clauses) over clause-final subordinators. The evidence cited is based on a database containing word order characteristics for a crosslinguistic sample of 625 languages (cf. Dryer 1989b, 1991, 1992). This preference is somewhat similar to a preferen...
In this paper, observer-based fault-tolerant control schemes for actuator and sensor faults are implemented within dynamic wind turbine simulations. The faults are directly reconstructed by means of a Takagi-Sugeno sliding mode observer. As simulation models, both a reduced-order model with 4 degrees of freedom and the aero-elastic code FAST by NREL are used. A fault-tolerant control scheme is ...
of polycrystalline Cu(In,Ga)Se2 thin-film solar cell absorbers R. G. Wilks, I. Repins, M. A. Contreras, R. F elix, J. Herrero-Albillos, L. Tati-Bismaths, F. Kronast, R. Noufi, and M. B€ ar Solar Energy Research, Helmholtz-Zentrum Berlin f€ ur Materialien und Energie GmbH (HZB), Hahn-Meitner-Platz 1, 14109 Berlin, Germany National Renewable Energy Laboratory (NREL), Golden, Colorado 80401, USA D...
Advances in high-performance sensing technologies enable the development of wind turbine condition monitoring systems to diagnose and predict the system-wide effects of failure events. This paper presents a vibration-based twostage fault detection framework for failure diagnosis of rotating components in wind turbines. The proposed framework integrates an analytical defect detection method with...
We present a method to generate renewable scenarios using Bayesian probabilities by implementing the Bayesian generative adversarial network (Bayesian GAN), which is a variant of generative adversarial networks based on two interconnected deep neural networks. By using a Bayesian formulation, generators can be constructed and trained to produce scenarios that capture different salient modes in ...
Abstract The purpose of this study is to design a Photovoltaics (PV) stand-alone system for residential load in Bunaken Island using HOMER (Hybrid Optimization Multiple Energy Resources). Island, the case location, popular tourist spot North Sulawesi, Indonesia. This island facing issue limited access electrical energy from grid. and techno-economic analysis leveraged software. software was dev...
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