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  1. Book: Cross-modulation of harmonics in HVDC schemes

    Arrillaga, J

    (CIGRE ; 143)

    1999  

    Author's details Working Group 14.25, CIGRE. J. Arrillaga
    Series title CIGRE ; 143
    Language English
    Size 29 S
    Publisher CIGRE
    Publishing place Paris
    Document type Book
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  2. Book: Flexible power transmission

    Arrillaga, J / Liu, Y. H / Watson, N. R

    the HVDC options

    2007  

    Author's details J. Arrillaga; Y. H. Liu; N. R. Watson
    Keywords Electric power distribution ; Electric power transmission
    Language English
    Size XII, 362 S., Ill., graph. Darst.
    Publisher Wiley
    Publishing place Chichester
    Document type Book
    Note Formerly CIP
    ISBN 0470056886 ; 9780470056882
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  3. Book: High voltage direct current transmission

    Arrillaga, Jos

    (IEE power & energy series ; 29)

    1998  

    Author's details Jos Arrillaga
    Series title IEE power & energy series ; 29
    Language English
    Size XII, 299 S, graph. Darst, 24cm
    Edition 2. ed
    Publisher Inst. of Electrical Engineers
    Publishing place London
    Document type Book
    Note Includes index. - Previous ed.: London: Peregrinus, 1983
    ISBN 0852969414 ; 9780852969410
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  4. Book ; Online: High Voltage Direct Current Transmission

    Arrillaga, Jos

    (IET power and energy series ; 29)

    1998  

    Abstract: Since the first edition of this book in 1983, HVDC technology has continued to expand and few power systems can now escape its influence. This thoroughly revised text develops the coverage in the first edition, describing the variety of reasons ... ...

    Author's details Jos Arrillaga
    Series title IET power and energy series ; 29
    Abstract Since the first edition of this book in 1983, HVDC technology has continued to expand and few power systems can now escape its influence. This thoroughly revised text develops the coverage in the first edition, describing the variety of reasons justifying the use of DC transmission as well as the basic concepts and techniques involved in the AC-DC and DC-AC conversion processes. It has been fully updated and enlarged to include descriptions of the widening applications of DC, the current state-of-the-art thyristors and other semiconductor devices, and the new developments that continue to make HVDC a competitive technology. The book should be of interest to practising engineers and researchers involved in the power industry. It will also be of assistance to lecturers and students in the power systems and power electronics disciplines
    Keywords Electric current converters ; Electric power transmission--Direct current ; Electronic apparatus and appliances ; Power electronics ; Semiconductors ; Thyristors
    Language English
    Size Online-Ressource (312 S.)
    Edition 2. ed.
    Publisher IET
    Publishing place London
    Document type Book ; Online
    Note Includes bibliographical references and index
    ISBN 0852969414 ; 9780852969410 ; 9781849194402 ; 1849194408
    DOI 10.1049/PBPO029E
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  5. Book: Power system quality assessment

    Arrillaga, J / Chen, S / Watson, Nancy Ralph

    2001  

    Author's details J. Arrillaga, N. R. Watson; S. Chen
    Language English
    Size XII, 300 S, graph. Darst, 23 cm
    Edition Reprint.
    Publisher Wiley
    Publishing place Chichester u.a.
    Document type Book
    Note Literaturangaben
    ISBN 0471988650 ; 9780471988656
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  6. Article ; Online: Radiation and cloud-base lowering fog events

    Román-Cascón, Carlos / Yagüe, Carlos / Steeneveld, Gert-Jan / Morales, Gema / Arrillaga, J.A. / Sastre, Mariano / Maqueda, Gregorio

    Atmospheric Research

    Observational analysis and evaluation of WRF and HARMONIE

    2019  Volume 229

    Abstract: Most of the effects caused by fog are negative for humans. Yet, numerical weather prediction (NWP) models still have problems to simulate fog properly, especially in operational forecasts. In the case of radiation fog, this is partially caused by the ... ...

    Abstract Most of the effects caused by fog are negative for humans. Yet, numerical weather prediction (NWP) models still have problems to simulate fog properly, especially in operational forecasts. In the case of radiation fog, this is partially caused by the large sensitivity to many aspects, such as the synoptic and local conditions, the near-surface turbulence, the aerosol and droplet microphysics, or the surface characteristics, among others. This work focuses on an interesting 8-day period with several alternating radiation and cloud-base lowering (CBL) fog events observed at the Research Centre for the Lower Atmosphere (CIBA) in the Spanish Northern Plateau. On the one hand, radiation fog events are associated with strong surface cooling leading to high stability close to the surface and low values of turbulence, giving rise to shallow fog. The evolution of this type of fog is markedly sensitive to the dynamical conditions close to the surface (i.e., wind speed and turbulence). On the other hand, CBL fog presents deeper thickness associated with higher values of turbulence and less stability. Subsequently, we evaluated the fog-forecasting skill of two mesoscale models (WRF and HARMONIE) configured as similar as possible. Both models present more difficulties simulating radiation fog events than CBL ones. However, the duration and vertical extension of the CBL fog events is normally overestimated. This extended-fog avoids the surface radiative cooling needed to simulate radiation fog events formed the following nights. Therefore, these periods with alternating CBL and radiation fog are especially challenging for NWP models.
    Keywords Cloud-base-lowering ; Fog ; HARMONIE ; Model skill ; Radiation ; WRF
    Subject code 660
    Language English
    Publishing country nl
    Document type Article ; Online
    ISSN 0169-8095
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: From weak to intense downslope winds

    Ander Arrillaga, Jon / Yagüe, Carlos / Román-Cascón, Carlos / Sastre, Mariano / Antonia Jiménez, Maria / Maqueda, Gregorio / Vilà-Guerau De Arellano, Jordi

    Atmospheric Chemistry and Physics

    Origin, interaction with boundary-layer turbulence and impact on CO2 variability

    2019  Volume 19, Issue 7

    Abstract: The interconnection of local downslope flows of different intensities with the turbulent characteristics and thermal structure of the atmospheric boundary layer (ABL) is investigated through observations. Measurements are carried out in a relatively flat ...

    Abstract The interconnection of local downslope flows of different intensities with the turbulent characteristics and thermal structure of the atmospheric boundary layer (ABL) is investigated through observations. Measurements are carried out in a relatively flat area 2 km away from the steep slopes of the Sierra de Guadarrama (central Iberian Peninsula). A total of 40 thermally driven downslope events are selected from an observational database spanning the summer 2017 period by using an objective and systematic algorithm that accounts for a weak synoptic forcing and local downslope wind direction.We subsequently classify the downslope events into weak, moderate and intense categories, according to their maximum 6m wind speed. This classification enables us to contrast their main differences regarding the driving mechanisms, associated ABL turbulence and thermal structure, and the major dynamical characteristics. We find that the strongest downslope flows (U > 3:5ms -1 ) develop when soil moisture is low (< 0:07m3 m.3) and the synoptic wind not so weak (3.5ms -1 < V850 < 6ms -1 ) and roughly parallel to the direction of the downslope flow. The latter adds an important dynamical input, which induces an early flow advection from the nearby steep slope, when the local thermal profile is not stable yet. Consequently, turbulence driven by the bulk shear increases up to friction velocity .uμ/1ms -1 , preventing the development of the surfacebased thermal inversion and giving rise to the so-called weakly stable boundary layer. On the contrary, when the dynamical input is absent, buoyancy acceleration drives the formation of a katabatic flow, which is weak (U < 1:5ms -1 ) and generally manifested in the form of a shallow jet below 3 m. The relative flatness of the area favours the formation of very stable boundary layers marked by very weak turbulence (u < 0:1ms -1 ). In between, moderate downslope flows show intermediate characteristics, depending on the strength of the dynamical input and the occasional ...
    Keywords Life Science
    Subject code 532
    Language English
    Publishing country nl
    Document type Article ; Online
    ISSN 1680-7316
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Book: High voltage direct current transmission

    Arrillaga, J

    (IEE power engineering series ; 6)

    1983  

    Author's details J. Arrillaga
    Series title IEE power engineering series ; 6
    Language English
    Size 245 S, Ill., graph. Darst
    Publishing place London
    Document type Book
    ISBN 0906048974 ; 9780906048979
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  9. Book: Power system harmonics

    Arrillaga, Jos / Watson, Neville R

    2003  

    Author's details Jos Arrillaga and Neville R. Watson
    Language English
    Size x, 399 p, ill., 1 map, 26 cm.
    Edition 2. ed.
    Publisher Wiley
    Publishing place Chichester
    Document type Book
    Note Includes bibliographical references and index ; Previous ed. by J. Arrillaga, D.A. Bradley and P.S. Bodger. 1985
    Accompanying material 1 CD-ROM
    ISBN 0470851295 ; 9780470851296
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  10. Article ; Conference proceedings ; Online: Can we Estimate the Fog-top Height from Atmospheric Turbulent Measurements at Surface?

    Román-Cascón, C. / Yague, C. / Steeneveld, G.J. / Sastre, M. / Arrillaga, J.A. / Maqueda, G.

    2016  

    Abstract: The knowledge of the fog-top height (fog thickness) can be very important for aircraft maneuvers, data assimilation/validation of Numerical Weather Prediction models or to improve the nowcasting of the fog-dissipation time. Nevertheless, its value is ... ...

    Abstract The knowledge of the fog-top height (fog thickness) can be very important for aircraft maneuvers, data assimilation/validation of Numerical Weather Prediction models or to improve the nowcasting of the fog-dissipation time. Nevertheless, its value is usually difficult to determine and it is normally approximated with satellite data, ground remote-sensing instruments or through its estimation using temperature and humidity data from atmospheric soundings. These instruments are expensive and their data are not always available. In this work, we show how the fog-top height has a linear correlation with atmospheric turbulent variables measured close to the surface. These relations are statistically calculated from high-quality observational data of several radiation-fog events at two research sites: The Research Centre for the Lower Atmosphere (CIBA) in Spain and the Cabauw Experimental Site for Atmospheric Research (CESAR) in The Netherlands. Thus, surface friction velocity and buoyancy heat flux are presented as potential indicators of fog thickness. The presented correlations are also evaluated over a long-lasting radiation-fog event at CESAR. The proposed methods could be operationally implemented for providing a continuous estimation of fog-top height through the deployment of a sonic anemometer close to the surface.
    Keywords Life Science
    Language English
    Publishing country nl
    Document type Article ; Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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