| Abstract |
Utilization of voltage-source converters (VSC) in high-voltage direct current (HVDC) transmission systemsare increased in recent years. This paper proposes cost-effective solutions for handling dc-sidefaults in VSC HVDC bipolar transmission. The basic idea of this paper is to replace the existing mechanicalneutral bus switch (NBS), which is normally composed of resonance circuit and mechanicalbreaker, with semiconductor-based dc breakers. Consequently, converter blocked-time can be reducedsignificantly and ac grid can be supported with reactive power within a short time. The proposed methodwill improve the stability of the connected ac grid. |
