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    Item type:Publication,
    A novel transmission line's atc assessment method by considering the Generation Dispatch limit (GDL) and renewable generation capacity with power flow sensitivity analysis
    (2019-01-01)
    Wannoi, Chaisit
    ;
    Wannoi, Narumon
    ;
    Boonkhun, Churirut
    ;
    Temiyasathit, Chivalai
    ;
    Chompoo-Inwai, Chai
    This paper presents a novel transmission line's Availability Transfer Capability (ATC) assessment method by considering the Generation Dispatch Limit (GDL) and renewable generation capacity. This method has calculated the power remaining from the Total Transfer Capability (TTC). The TTC in this study is the total generation available declaration of all maximum Generation Shift Factor (GSF) generations to transfer power on transmission line depended on the Power Purchase Agreement of each power generation and of each renewable generation integrated in the system. The maximum GSF generations are defined by using the power sensitivity analysis. Results of this novel method are compared with the traditional transmission line's thermal limit method. Main findings showed that newly proposed method for ATC calculation can be used for the ATC assessment of transmission line and can be a good predictive index to protect power system's voltage stability issue. Moreover, it can be applied to the congestion management scheme with the optimal primary respond generation to control the stability of power transfer on the transmission line.
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    Item type:Publication,
    Xylenes production from renewable feedstocks
    (2013-12-01)
    Sooknoi, T.
    ;
    Ausavasukhi, A.
    Considerable efforts have been made during the past few years for utilizing renewable resources for chemical feedstock. As being ligno-cellulosic materials, biomass provides ready-to-use aromatic precursors for the production of xylene from biomassderived compounds. Typical approach involve fast-pyrolysis of the biomass followed by catalytic deoxygenation of the aromatic components (mainly the phenolics) in the "pyrolysis bio-oil" As the pyrolysis products always possess reactive oxygenates such as alcohols, aldehydes, and acids, the reaction requires a catalyst that readily promotes deoxygenation and/or dealkylation to form less substituted aromatic ring. Metals supported acidic oxides have been widely investigated for the reactions involving hydrogen (hydrogenation/ dehydrogenation and hydrogenolysis) and carbocation intermediates. Alternatively, refined biomass such as ethanol, fatty acid and glucose can also be converted to aromatic hydrocarbons. This approach involves dehydration, decarbonylation and/or decarboxylation to primarily produce olefinic or paraffinic hydrocarbons which can be subsequently converted to aromatic via classical acid catalysed processes. Shape selective feature of the zeolites always plays marked role for selective formation of xylenes for all approaches. This chapter will review recent attempts for xylene productions from renewable feedstock. The relation between the molecular architecture of the biomass-derived compounds and the selected catalyst system will be highlighted, together with the reaction conditions and possible on-going xylene production processes. © 2013 by Nova Science Publishers, Inc. All rights reserved.