Effect of adaptive single-pole reclosing on the stochastic behaviorof turbine-generator shaft torsional torques |
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Authors: | Aboreshaid S. Billinton R. Faried S.O. |
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Affiliation: | Power Syst. Res. Group, Saskatchewan Univ., Saskatoon, Sask.; |
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Abstract: | This paper presents a Monte Carlo based approach to evaluate of the maximum torsional torques induced in turbine-generator shafts during high-speed reclosing of system faults. Two reclosing schemes were considered, namely simultaneous and adaptive reclosing. In the case of a single line-to-ground fault, single-pole reclosing is considered in clearing such a fault. In this context, investigations have been conducted on a large turbine-generator model taking into consideration the uncertainty of several factors associated with the practical operation of a power system. The effect of employing adaptive single-pole reclosing on the expected maximum torsional torques as well as their variances have also been investigated. A risk index which reflects the likelihood that the torque induced in a turbine-generator shaft exceeds its design value is also presented |
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