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Wind is being recognized as an encouraging and cost effective generation source both in large grid connected systems and small isolated applications. The actual benefits obtained from utilizing wind energy for electric power generation can be investigated using reliability and economic evaluation techniques. The focus of these techniques is usually directed to the areas of reliability and the investment/operation...
In this paper it is proposed an efficient contingency screening and ranking algorithm for assessment and classification of multiple contingencies of an Electric Power System using the Rough Set theory. The developed methodology produces a classification of the system operation in five possible states: normal, alert, emergency, in-extremis and restorative. These different operating states correspond...
A combination of diagnostic techniques was carried out for a 232 MVA hydro-generator stator. These techniques included quality assessment of the electrical contact between semi-conductive (S/C) coating of stator bars and the magnetic iron core, partial discharge (PD) measurements, polarization and depolarization currents and finally stator bar dissection. The analytic hierarchy process (AHP), a multi-criteria...
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