Abstract
Power system operators are continuously striving to achieve more economical, environmental friendly, and stable operation of the system. The integration of Renewable Energy Sources (RES) can benefit the system in terms of cost and environmental friendliness but at the same time it poses challenges related to system stability. One way for achieving an increased penetration of RES while maintaining the system integrity is the installation of Battery Energy Storage Systems (BESS). In this paper, the effect of a large scale BESS on the power system operating condition is investigated. A MILP-based unit commitment algorithm is used for obtaining the optimal generation scheduling in the system when a BESS is employed and the results are used for evaluating the improvement in several indices such as system operating cost, CO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> emissions, and system flexibility. Through a case study, the positive impact of the deployment of a BESS on a power system is verified, indicating that the aforementioned indices are improved in the presence of a BESS.
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