Vulnerability Assessment of UHV Converter Station Considering Cognitive Uncertainty

UHV converter station is a complex system that includes a variety of electrical equipment and buildings. In order to study the seismic resilience of UHV converter station, a systematic analysis method based on successful flow is proposed. This method comprehensively considers relationship between the electrical equipment, buildings’ location, and electrical power transmission paths, and then establishes reliability evaluation model of the UHV converter station which takes aftershock residual transmission capability as evaluation index. With the seismic vulnerability curve of the electrical equipment, the Monte Carlo simulation method is used to realize the aftershock vulnerability analysis. The model is used to evaluate seismic resilience of one real UHV converter station in Sichuan Province of China. Computation results shows its residual electrical power transmission capability when meets different level earthquakes. The research benefits to evaluate power grids’ seismic resilience and improve power supply reliability.