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Assessment and Optimization of Wind Energy Integration Into the Power Systems: Application to the Portuguese System

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4 Author(s)
Sérgio Faias ; Innovation in Electrical and Energy Engineering, ISEL-Lisbon Engineering Superior Institute and Cie3-Center, Lisbon, Portugal ; Jorge de Sousa ; Francisco Silva Reis ; Rui Castro

The increasing integration of wind energy in power systems can be responsible for the occurrence of over-generation, especially during the off-peak periods. This paper presents a dedicated methodology to identify and quantify the occurrence of this over-generation and to evaluate some of the solutions that can be adopted to mitigate this problem. The methodology is applied to the Portuguese power system, in which the wind energy is expected to represent more than 25% of the installed capacity in a near future. The results show that the pumped-hydro units will not provide enough energy storage capacity and, therefore, wind curtailments are expected to occur in the Portuguese system. Additional energy storage devices can be implemented to offset the wind energy curtailments. However, the investment analysis performed show that they are not economically viable, due to the present high capital costs involved.

Published in:

IEEE Transactions on Sustainable Energy  (Volume:3 ,  Issue: 4 )