Optimal Energy Management of an Off-Grid Mmulti-Source Hybrid Energy System in Presence of Storage Systems to Reduce the Cost of Demand

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Faculty of Engineering, University of Mohageg Ardabili, Ardabil, Iran

Abstract

In this paper, a hybrid system of electric energy supply in presence of storage systems in off-grid applications has been studied. Different renewable sources such as solar cell and wind turbine, and backup and storage components such as diesel generator and battery were used to meet the demand of time with high reliability. Two types of load demand, i.e. AC and DC is intended for consumers. Then, according to a 24-hour load demand and using a mathematical nonlinear quadratic programming algorithm, the optimal power flow between the components has taken place with the lowest cost to consumers supplied to the load and to keep the system at the highest level of reliability so that the load demand will always be met. In the following, the cost of fuel in diesel generator and battery charging, according to battery state of charge, for one day load demand in different seasonal conditions and different production weighting coefficients for the components of the hybrid electrical energy system is provided and for various conditions of operation calculated annual costs load demand. In the end, the impact of using various types of batteries storage system and lead-acid battery to achieve the optimal state of operation investigated. The results show the effectiveness of the proposed model and the optimization algorithm.

Keywords

TABRIZ JOURNAL OF ELECTRICAL ENGINEERING
Volume 47, Issue 3 - Serial Number 81
November 2017
Pages 1099-1110

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