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مجله بین المللی برق و amp; سیستم های انرژی
جزئیات رویداد
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  • an innovative technique to evaluate network equivalent for voltage stability assessment in a widespread sub-grid system

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    • تاریخ ارائه: 1393/01/01
    • تاریخ انتشار در تی پی بین: 1393/01/01
    • تعداد بازدید: 622
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the equivalent two-bus network models currently available are obtained by lumping all the series impedances and shunt admittances of transmission lines within a series equivalent impedance, to assess voltage stability of multi-bus power system. this paper reports the development of an equivalent pi-network model using a new methodology considering series and shunt parts of line loss separately obtained from the operational parameters of optimal power flow solution of the original multi-bus power network, which can be applied to assess the overall voltage stability status of the system accurately by developing the concept of a generalized global voltage stability margin (gvsm). simulation results for a typical longitudinal power supply (lps) system and a robust practical (indian eastern grid) system establish that the pi-equivalent model obtained by the proposed method is highly promising for assessing voltage stability of any power system at any operating point in global scenario in a better way as compared to available series equivalent model. continuation power flow (cpf) method has also been adopted here to verify the potential of the proposed method for voltage stability assessment. in the proposed equivalent network the generators have been modeled more accurately considering optimal operating criteria.

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