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  • 1
    Electronic Resource
    Electronic Resource
    A Novel Modulated Power Filter Compensator for Distribution Networks with Distributed Wind Energy (2007)
    Berkeley, Calif. : Berkeley Electronic Press (now: De Gruyter)
    International journal of emerging electric power systems 8.2007, 3, art6 
    Details
    ISSN: 1553-779X
    Source: Berkeley Electronic Press Academic Journals
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: During the last two decades, renewable wind energy has become increasingly popular as a consequence of strong ecological concerns and appealing advantages with regard to economical energy solutions in remote communities. Furthermore, with very large wind farms emerging, the dispersed renewable wind energy is required to be fully connected to the electrical distribution networks. However, the integration of dispersed renewable wind energy will pose a great challenge to the power quality in the distribution networks when the weak nature of the grid in remote areas and the uncertainty of wind are taken into consideration.This paper presents a novel Modulated Power Filter Compensator (MPFC) for the distribution networks with dispersed renewable wind energy interfaced. A tri-loop error driven controller is used to adjust the PWM switching of the modulated power filter compensator. Full power factor correction and power quality improvement is validated under different operation conditions, like load switching and wind velocity excursions. The MPFC device is a member of novel FACTS based compensators developed by the first author.
    Type of Medium: Electronic Resource
    URL: http://www.bepress.com/ijeeps/vol8/iss3/art6
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Surface properties and drug release behavior of polycaprolactone polyether blend and copolymer (1996)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 7 (1996), S. 104-107 
    Details
    ISSN: 1042-7147
    Keywords: polycaprolactone-poly(ethylene glycol) block copolymer ; blended polymer ; XPS ; surface property ; drug release behavior ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The surface properties of polycaprolactone (PCL)-poly(ethylene glycol) (PEG) block copolymer (PCE) and blend (B-PCE) of PCL and PEG obviously affect the drug release behavior of the polymer. In this paper, both surface properties of PCE and B-PCE are studied and compared by measuring their water sorption and using the contact angle and X-ray photoelectron spectroscopy technique. The effect of the polyether segment content in PCE and B-PCE on hydrophilicity is discussed. The results show that a hydrophilic polyether segment moves towards the surface and enriches on the surface for either PCE or B-PCE. The enrichment content of the polyether segment of PCE and the hydrophilicity of its surface are higher than that of B-PCE. A reason for the different drug release rates for PCE and B-PCE is suggested.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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