Seismic vulnerability assessment on porcelain electrical equipment based on Kriging model

Abstract

To improve the efficiency in assessing the seismic vulnerability of porcelain electrical equipment when considering different sorts of uncertainty, this paper proposes a seismic vulnerability analysis method based on Kriging model. The one-dimension and multi-dimension Kriging models were considered in the method. Afterward, case studies were conducted on an ultra-high voltage (UHV) gas insulated switchgear (GIS) porcelain bushing. The seismic vulnerability of the UHV GIS bushing obtained by incremental dynamic analysis (IDA) method and the Kriging method were compared. The validity and applicability of the method were verified. Moreover, the effects of the dimensions of the Kriging model were analyzed. The results indicated that the Kriging method reduced the calculation quantity by 40% compared with IDA method, and the analysis error was within 5%, which significantly improved the efficiency of seismic vulnerability analysis of porcelain electrical equipment. The multi-dimension Kriging model-based method is suitable for the seismic vulnerability analysis considering different sorts of uncertainty, while the one-dimensional Kriging model-based method can obtain more stable seismic vulnerability assessment results.