Abstract: By using systematic analysis tools, Electrical System Robustness Study (ESRS) finds out the potential weakness in power supply and distribution system early in the engineering stage, and puts forward corresponding solutions to eliminate them in the engineering stage, so as to ensure the system robustness and the normal operation and maintenance of the plant. The application of ESRS in an oversea refinery project is introduced from the aspects of research objectives, research scope, focus and items to be noted to provide some help for domestic and oversea projects in the future. It is hoped that effective ESRS can be conducted in future domestic projects.

Key words: electrical system, robustness study, research objective, focus, item to be noted