전력전자학회논문지 (The Transactions of the Korean Institute of Power Electronics)

  • 제22권6호
  • /
  • Pages.484-495
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  • 2017
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  • 1229-2214(pISSN)
  • /
  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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HVDC 냉각시스템의 전기전도현상 및 부식현상 기술 분석과 스위칭 소자의 방열판 최적 설계 검토

The Analysis of Electrical Conduction and Corrosion Phenomena in HVDC Cooling System and the Optimized Design of the Heat Sink of the Semiconductor Devices

  • Kim, Chan-Ki (Power Transmission Laboratory, KEPCO Research Institut) ;
  • Park, Chang-Hwan (Dept. of Electrical Eng., Pusan National University) ;
  • Kim, Jang-Mok (Dept. of Electrical Eng., Pusan National University)
  • 투고 : 2017.06.27
  • 심사 : 2017.10.19
  • 발행 : 2017.12.20
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초록

In HVDC thyristor valves, more than 95% of heat loss occurs in snubber resistors and valve reactors. In order to dissipate the heat from the valves and to suppress the electrolytic current, water with a high heat capacity and a low conductivity of less than 0.2 uS/cm must be used as a refrigerant of the heat sink. The cooling parts must also be arranged to reduce the electrolytic current, whereas the pipe that supplies water to the thyristor heat sink must have the same electric potential as the valve. Corrosion is mainly caused by electrochemical reactions and the influence of water quality and leakage current. This paper identifies the refrigerants involved in the ionization, electrical conductivity, and corrosion in HVDC thyristor valves. A method for preventing corrosion is then introduced. The design of the heat sink with an excellent heat radiation is also analyzed in detail.

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참고문헌

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