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Novel control method for intermittent renewable source in dc microgrid.

Author(s)
A. Azizi Faculty of Electrical Engineering, K.N.Toosi University of Technology, Tehran, Iran
A. Salavati Faculty of Electrical Engineering, K.N.Toosi University of Technology, Tehran, Iran
H. Chalangar Faculty of Electrical Engineering, K.N.Toosi University of Technology, Tehran, Iran
S. M. T. Bathaee Faculty of Electrical Engineering, K.N.Toosi University of Technology, Tehran, Iran
Abstract
Control of micro-grid with the intermittent distributed generation (DG) resource is the most common challenge to attain the dispatchable energy source. Usually for solving this problem, completely loaded response energy storage system(ESS) like battery, super compositor and etc. are used. In this paper a new control strategy to have optimal use of ESS for eliminating this problem is presented. To implement this control strategy by power forecasting algorithm, the output power of PV will be predicted on hourly basis with the use of daily solar irradiation. Also with the designing of a control algorithm, the difference between actual power and load consumption will be compensated by storage system or upstream network. The designed control system can make micro-grid voltage is stable. The proposed algorithm indicates that the battery constraints have been satisfied as the battery SOC, that should be between 30% to 100% of optimal lifetime of the battery and level of the battery charge and discharge current was is in permissible range. The efficiency of this new control strategy has been tested with actual PV system data and it has been shown that the ESS can completely remove fluctuation in the PV output power with low deviation and smooth transition.
Publication Details
Page(s) 211-216
DOI DOI not available
Published Journal: Science International, Volume: 26, Issue: 1, Year: 2014

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