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오윤식(Yun-Sik Oh),권기현(Gi-Hyeon Gwon),박지경(Ji-Kyung Park),조규정(Kyu-Jung Jo),손승현(Seung-Hyun Sohn),김철환(Chul-Hwan Kim),김완종(Wan-Jong Kim) 대한전기학회 2013 전기학회논문지 Vol.62 No.6
Most of faults occurring in transmission lines are transient faults. For such faults, automatic reclosing is economic and effective method to improve the reliability and transient stability of power system. Many countries apply various reclosing schemes considering issues of their own systems such as transient stability, rate of success. Currently, different reclosing schemes are applied in Korean transmission systems according to a rated voltage. In this paper, we conduct an evaluation of reclosing schemes in Korean transmission systems considering transient stability. Computer simulations are performed by using ElectroMagnetic Transient Program (EMTP) and transmission system is modeled based on actual data of Korea.
송전계통 과도 안정도 향상을 위한 최적 순차 재폐로에 관한 연구
권기현(Gi-Hyeon Gwon),오윤식(Yun-Sik Oh),박지경(Ji-Kyung Park),조규정(Kyu-Jung Jo),손승현(Seung-Hyun Sohn),김철환(Chul-Hwan Kim) 대한전기학회 2013 전기학회논문지 Vol.62 No.10
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.