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Review on unit commitment under uncertainty approaches

Wind power has already become an important renewable energy resource in many regions of the world. Because of its variability and uncertainty, integration of wind power presents a challenge that, if not adequately addressed, can jeopardize the operational reliability of a power system. Generally, generation unit commitment decisions are made once a day, i.e., the commitment decisions are made 24 or more hours ahead of the actual operation. Taking into account the uncertainty of wind power prediction, these decisions need to provide sufficient flexibility at a minimum price. This paper describes the current practice and analyzes unit commitment formulations available in literature highlighting their advantages and shortcomings.