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Fuzzy MILP Unit Commitment Incorporating Wind Generators

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4 Author(s)
Venkatesh, B. ; Dept. of Electr. & Comput. Eng., Ryerson Univ., Toronto, ON ; Peng Yu ; Gooi, H.B. ; Dechen Choling

Day-ahead unit commitment (UC) solution methods seek to determine the status and output of all available generators. In a world with an increasing integration of renewable energy sources such as wind electric generators (WEG), the UC solution process must model and include WEGs too in the decision-making process. Power output of WEGs in a day-ahead decision-making process are usually modeled using a short-term probabilistic forecast. Inclusion of WEGs introduces uncertainty in the solution that may be quantified through an imbalance risk function. Thus a UC solution method should seek a solution to minimize cost and risk in schedule. Two strategies are proposed in this paper to minimize costs and handle risks introduced due to WEGs. These formulations are posed as fuzzy optimization models and are solved using the mixed integer linear programming (MILP) technique. The proposed strategies are tested on a 26- and a 100-generator systems with associated transmission networks that have three and six wind generators each. The results with two strategies of handling WEGs are discussed.

Published in:

Power Systems, IEEE Transactions on  (Volume:23 ,  Issue: 4 )

Date of Publication:

Nov. 2008

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