Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Optimal Protecting the Static Excitation Equipment and Rotor Windings of Synchronous Machines Against Overvoltage

대용량 발전기 정지형 여자시스템 계자회로에 발생되는 최적 과전압 억제 회로

  • Lim, I.H. (Korea Electric Power Research Institute) ;
  • Ryu, H.S. (Korea Electric Power Research Institute) ;
  • Kim, S.Y. (Korea Electric Power Research Institute)
  • 임익헌 (전력연구원 시스템통신연구소) ;
  • 류호선 (전력연구원 시스템통신연구소) ;
  • 김수열 (전력연구원 시스템통신연구소)
  • Published : 1998.07.20
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Abstract

In the case of synchronous machines, certain power system disturbances cause the induced rotor current to assume negative values when no static converter is present. A converter, however. prevents negative current from flowing, so that overvoltages occur. The overvoltages can be effectively limited as crowbar circuit using GTO. This newly proposed crowbar circuit with current limiting resistor absorbs energy when overvoltage comes from power system repeatedly and is verified through experiment.

Keywords