Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2003.10a
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- Pages.186-188
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- 2003
The characteristic of leakage current in ZnO surge arrestor elements with mixed direct and 60Hz voltage
중첩전압(직류+교류 60Hz)에서 산화아연 피뢰기 소자의 누설전류 특성
- Lee, B.H. (HEIRC, Inha Univ.) ;
- Pak, K.Y. (HEIRC, Inha Univ.) ;
- Kang, S.M. (HEIRC, Inha Univ.) ;
- Choi, H.S. (HEIRC, Inha Univ.) ;
- Oh, S.K. (HEIRC, Inha Univ.)
- 이복희 (인하대학교 차세대 고전압전력기술연구센터) ;
- 박건영 (인하대학교 차세대 고전압전력기술연구센터) ;
- 강성만 (인하대학교 차세대 고전압전력기술연구센터) ;
- 최휘성 (인하대학교 차세대 고전압전력기술연구센터) ;
- 오성균 (인하대학교 차세대 고전압전력기술연구센터)
- Published : 2003.10.31
Abstract
The ZnO surge arrester is the protective device for limiting surge voltages on equipment by diverting surge current and returning the device to its original status. The occurrence of overvoltage appears in any phase to AC power supply system and it appears in mixing AC and impulse voltages, moreover because HVDC power supply system uses converter in semiconductor, it makes mixed DC and high harmonics voltages. In this study, the various mixed AC and DC voltages was made for investigating the degradation effect of ZnO arrester according to mixed voltage. As a result, the increase of DC component to mixed voltages causes the increase of resistive component of total leakage current to ZnO block. In changing V-I curve for mixed voltages, the cross-over point acts a factor as making the proper capacitor size of an equivalent circuit for ZnO block.
Keywords