Volume 9, Issue 3 (10-2019)                   JEM 2019, 9(3): 50-63 | Back to browse issues page


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Hajiaghasi S, Salemnia, Hamzeh M. A New Method For Determination of Hybrid Energy Storage Capacity in Isolated Microgrid. JEM. 2019; 9 (3) :50-63
URL: http://energy.kashanu.ac.ir/article-1-1000-en.html
Shahid Beheshti University
Abstract:  
In recent years, hybrid energy storage (HES) are used in renewable systems and microgrids to increase lifetime and reliability extremely. In this paper, a new method for determining the capacity of battery and supercapacitor in an isolated microgrid is presented. Differences between generation and load power, using discrete fourier transform, is transferred to the frequency domain; through determining the cut-off frequency, an optimized cost function can also be obtained so much so that high frequencies are provided by supercapacitor and low frequencies by the battery. In the presented method, determining the capacity of the storages is done in such a way that the lifetime of storages is maximized in addition to a good response to loads. The use of the proposed method due to the hybridization of storages improves the dynamic performance of the system by reducing the number of battery charging and discharging. The result is a decrease in the storage cost. Due to the necessity and importance of storages in the isolated microgrid, the considered microgrid is isolated from the main grid consisting of different distributed generations. The proposed algorithm is tested on an isolated microgrid, and the results confirm the effectiveness of the method.
Type of Study: Research | Subject: Electrical Engineering

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