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Article
Affiliation(s)

Department of Electrical and Electronics Engineering, University of the Ryukyus, Okinawa 903-0123, Japan

ABSTRACT

This paper focused on generation scheduling problem with consideration of wind, solar and PHES (pumped hydro energy storage) system. Wind, solar and PHES are being considered in the NEPS (northeast power system) of Afghanistan to schedule all units power output so as to minimize the total operation cost of thermal units plus aggregate imported power tariffs during the scheduling horizon, subject to the system and unit operation constraints. Apart from determining the optimal output power of each unit, this research also involves in deciding the on/off status of thermal units. In order to find the optimal values of the variables, GA (genetic algorithm) is proposed. The algorithm performs efficiently in various sized thermal power system with equivalent wind, solar and PHES and can produce a high-quality solution. Simulation results reveal that with wind, solar and PHES the system is the most-cost effective than the other combinations.

KEYWORDS

Generation scheduling, unit commitment, renewable energy sources, GA. 

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