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A Study on Optimal Sequential Reclosing to Improve Transient Stability in Transmission System

송전계통 과도 안정도 향상을 위한 최적 순차 재폐로에 관한 연구

  • Gwon, Gi-Hyeon (Dept. of Information and Communication Engineering, Sungkyunkwan University) ;
  • Oh, Yun-Sik (Dept. of Information and Communication Engineering, Sungkyunkwan University) ;
  • Park, Ji-Kyung (Dept. of Information and Communication Engineering, Sungkyunkwan University) ;
  • Jo, Kyu-Jung (Dept. of Information and Communication Engineering, Sungkyunkwan University) ;
  • Sohn, Seung-Hyun (Dept. of Information and Communication Engineering, Sungkyunkwan University) ;
  • Kim, Chul-Hwan (Dept. of Information and Communication Engineering, Sungkyunkwan University)
  • Received : 2013.06.13
  • Accepted : 2013.09.24
  • Published : 2013.10.01

Abstract

In transmission system, reclosing scheme is very useful method to improve continuity of power supply and reliability of system. Especially, high speed reclosing which is used generally in transmission systems has a benefit improving transient stability. However, the reclosing can jeopardize the stability under the condition having high difference of voltage phase angle between both ends. Thus, this paper proposes optimal sequential reclosing scheme to improve transient stability due to reclosing operation. The optimal sequential reclosing is that each phase is closed sequentially considering transient energy. In this paper, 345kV and 154kV transmission system is modeled using EMTP (ElectroMagnetic Transient Program) to verify the performance and effectiveness of optimal sequential reclosing on transient stability. Also, Integral Square Error(ISE) method is used to assess the transient stability.

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