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A Study of Analysis on Klippon Relay Malfunction in HVDC System  

Kim Chan-Ki (한전 전력연구원 전력계통연구소)
Park ong-Kwang (한전 전력연구원 전력계통연구소)
Choo Jin-Boo (한전 전력연구원 전력계통연구소)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers B / v.54, no.9, 2005 , pp. 437-443 More about this Journal
Abstract
This paper deals with an experimental study for Klippon reiay in Cheju-Heanam HVDC system Klippon relay was troubled many times for years, and Klippon relay's fault caused the HVDC system trip. So for several years, these reasons of Klippon relay fault were investigated. The malfunction of Klippon relay in Cheju-Haenam HVDC system has been caused by the incoming of random surge(current source and voltage source). This paper has stu야ed the theoretic리 analysis and experimental study of Klippon relay, and the solutions against the problems were suggested according to their causes. Among the problems, grounding problem was removed by one-point earth connection and by modification of grounding circuit. The effects of inrush current was removed by inserting the blocking diodes by series in Klippon relay circuits. Finally, The over-voltage induced on Klippon relay, by a relay excitation coil, was removed by inserting a free-wheeling diode in Parallel with the excitation coil.
Keywords
High Voltage Direct Current(HVDC); Klippon Relay;
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