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مجله بین المللی برق و amp; سیستم های انرژی
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  • volt/var control in a distribution system by a fuzzy optimization approach

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    • تاریخ ارائه: 1393/01/01
    • تاریخ انتشار در تی پی بین: 1393/01/01
    • تعداد بازدید: 525
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     this paper presents a fuzzy optimization approach for solving the volt/var control problem in a distribution system with uncertainties. wind turbines are being considered in the study distribution system. the main purpose is to find an optimum combination of tap position for the main transformer under load tap changer (ultc) and on/off status for switched capacitors in a day to minimize the voltage deviation on the secondary bus of the main transformer, reactive power flow through the main transformer and real power loss on feeders. when performing the volt/var control problem in conventional methods, the hourly load and wind speed must be forecasted to prevent errors. however, actually there are always errors in these forecasted values. a characteristic feature of the proposed fuzzy optimization approach is that the forecast hourly load and wind speed errors can be taken into account using fuzzy sets. fuzzy set notations in the load demand, wind speed, voltage deviation on the secondary bus, reactive power flow through the main transformer and total real power loss on feeders are developed to obtain the optimal dispatching schedule under an uncertain environment. to demonstrate the effectiveness of the proposed method, the volt/var control problem is performed in a distribution system within the service area of yunlin district office of taiwan power company (tpc). the results show that a proper dispatching schedule for ultc position and capacitor switching operation can be reached using the proposed method.

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