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Sökning: WFRF:(Parsons J.) > Konferensbidrag

  • Resultat 1-7 av 7
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1.
  • Holttinen, H., et al. (författare)
  • Design and operation of power systems with large amounts of wind power production, IEA collaboration
  • 2006
  • Ingår i: European Wind Energy Conference and Exhibition 2006. - 9781622764679 ; , s. 156-165
  • Konferensbidrag (refereegranskat)abstract
    • New R&D collaboration on "Design and Operation of Power Systems with Large Amounts of Wind Power Production" has been formed in IEA Wind. The R&D task will collect and share information on the experience gained and the studies made on power system impacts of wind power, and review methodologies, tools and data used. This paper outlines the power system impacts of wind power, the national studies published and on-going and describes the goals of the international collaboration. There are dozens of studies made and ongoing related to cost of wind integration, however, the results are not easy to compare. An in-depth review of the studies is needed to draw conclusions on the range of integration costs for wind power. State-of-the art review process will seek for reasons behind the wide range of results for costs of wind integration - definitions for wind penetration, reserves and costs; different power system and load characteristics and operational rules; underlying assumptions on variability of wind etc.
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2.
  • Holttinen, H., et al. (författare)
  • State-of-the-art of design and operation of power systems with large amounts of wind power, summary of IEA wind collaboration
  • 2007
  • Ingår i: European Wind Energy Conference and Exhibition 2007, EWEC 2007. - 9781622764686 ; , s. 489-499
  • Konferensbidrag (refereegranskat)abstract
    • An international forum for exchange of knowledge of power system impacts of wind power has been formed under the IEA Implementing Agreement on Wind Energy. The task "Design and Operation of Power Systems with Large Amounts of Wind Power" is analysing existing case studies from different power systems.There are a multitude of studies made and ongoing related to cost of wind integration. However, the results are not easy to compare. This paper summarises the results from 15 case studies.
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3.
  • Ruffini, M, et al. (författare)
  • DISCUS : The Distributed Core For Ubiquitous Broadband Access
  • 2013
  • Ingår i: Future Network and MobileSummit 2013.
  • Konferensbidrag (refereegranskat)abstract
    • A new end to end architecture based on Long-Reach Passive OpticalNetwork (LR-PON) with wireless integration, a distributed core built of opticaltransparency islands and an OpenFlow-based control plane, which is beingdeveloped in the EU project DISCUS, is described in this paper. The maintechnological advances and the network modelling and optimization approach arereported.
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4.
  • Stamatescu, V., et al. (författare)
  • Towards an optimized design for the Cherenkov Telescope Array
  • 2012
  • Ingår i: HIGH ENERGY GAMMA-RAY ASTRONOMY. - : American Institute of Physics (AIP). - 9780735411234 ; , s. 758-761
  • Konferensbidrag (refereegranskat)abstract
    • The Cherenkov Telescope Array (CTA) is a future instrument for very-high-energy (VHE) gamma-ray astronomy that is expected to deliver an order of magnitude improvement in sensitivity over existing instruments. In order to meet the physics goals of CTA in a cost-effective way, Monte Carlo simulations of the telescope array are used in its design. Specifically, we simulate large arrays comprising numerous large-size, medium-size and small-size telescopes whose configuration parameters are chosen based on current technical design studies and understanding of the costs involved. Subset candidate arrays with various layout configurations are then selected and evaluated in terms of key performance parameters, such as the sensitivity. This is carried out using a number of data analysis methods, some of which were developed within the field and extended to CTA, while others were developed specifically for this purpose. We outline some key results from recent studies that illustrate our approach to the optimization of the CTA design.
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6.
  • Holler, M., et al. (författare)
  • Observations of the Crab Nebula with H.E.S.S. Phase II
  • 2015
  • Ingår i: Proceedings of Science.
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • The High Energy Stereoscopic System (H.E.S.S.) phase I instrument was an array of four 100m2 mirror area Imaging Atmospheric Cherenkov Telescopes (IACTs) that has very successfully mapped the sky at photon energies above ∼ 100GeV. Recently, a 600m2 telescope was added to the centre of the existing array, which can be operated either in standalone mode or jointly with the four smaller telescopes. The large telescope lowers the energy threshold for gamma-ray observations to several tens of GeV, making the array sensitive at energies where the Fermi-LAT instrument runs out of statistics. At the same time, the new telescope makes the H.E.S.S. phase II instrument. This is the first hybrid IACT array, as it operates telescopes of different size (and hence different trigger rates) and different field of view. In this contribution we present results of H.E.S.S. phase II observations of the Crab Nebula, compare them to earlier observations, and evaluate the performance of the new instrument with Monte Carlo simulations.
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  • Resultat 1-7 av 7

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