A Situation Awareness And Fault Recovery Decision-Aid System For Uhvdc

Given the large capacity that UHVDC system involved, once fault occurs, a huge impact to the power system along with problems such as power flow overrun, insufficient backup capacity, frequency drop and even cascading failure is expected. To prevent this, research on solutions and precautions of UHVDC faults is needed. In this paper, a comprehensive system with applications such as situation awareness, risk pre-assessment, preventive control, real-time monitoring, fault process tracing and fault recovery decision aiding is presented. This system has been deployed in provincial centers in China, played a crucial role in numbers of UHVDC failure cases and lay a firm foundation for the later research on related area.