抄録
Reduction of the insulation level of every equipment in converter stations is most important point for improvement of compact equipments, which tend to be higher voltage levels. Higher performance, lower discharge voltage surge arresters reduce the insulation level of the equipments. At this point of view, the high performance surge arresters are essential, In DC 500kV power systems, we reduced the protection level by approximately 25% in comparison with conventional system, it enable the protection level to be reduced 945kV/10kA Application of these surge arresters to the entrance of the DC mainline will reduce the insulation level of DC 500kV main circuit to L1WV 1, 300kV. This paper describes newly developed HVDC 500kV-600kV SF6 gas tank type surge arresters.
