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Energies 2017, 10(5), 622; doi:10.3390/en10050622

Development of a Leader-End Reclosing Algorithm Considering Turbine-Generator Shaft Torque

College of Information and Communication Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 16419, Korea
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Academic Editor: Chunhua Liu
Received: 8 March 2017 / Revised: 21 April 2017 / Accepted: 28 April 2017 / Published: 3 May 2017
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Abstract

High-speed auto-reclosing is used in power system protection schemes to ensure the stability and reliability of the transmission system; leader-follower auto-reclosing is one scheme type that is widely used. However, when a leader-follower reclosing scheme responds to a permanent fault that affects a transmission line in the proximity of a generation plant, the reclosing directly impacts the turbine-generator shaft; furthermore, the nature of this impact is dependent upon the selection of the leader reclosing terminal. We therefore analyzed the transient torque of the turbine-generator shaft according to the selection of the leader-follower reclosing end between both ends of the transmission line. We used this analysis to propose an adaptive leader-end reclosing algorithm that removes the stress potential of the transient torque to prevent it from damaging the turbine-generator shaft. We conducted a simulation in actual Korean power systems based on the ElectroMagnetic Transients Program (EMTP) and the Dynamic Link Library (DLL) function in EMTP-RV (Restructured Version) to realize the proposed algorithm. View Full-Text
Keywords: circuit breaker switching; power system transient; power system protection; turbine-generator circuit breaker switching; power system transient; power system protection; turbine-generator
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Cho, G.-J.; Park, J.-K.; Sohn, S.-H.; Chung, S.-J.; Gwon, G.-H.; Oh, Y.-S.; Kim, C.-H. Development of a Leader-End Reclosing Algorithm Considering Turbine-Generator Shaft Torque. Energies 2017, 10, 622.

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