Abstract: Electric power suppiy system is one of the key links in pipeline automation. Reasonable design of the electric power supply system for an oil transportaton staion and correct selection of electrical equpment closely relating to the station is a basic factor to maintain safe and stable operation of an automated pipeline. In order to match the pipeline automation, and based on the requirements for electric power supply system and oil transportation stations, the writer gives a decail introduction on the reiation between station electric power supply system and SCADA system and their interfaces with each reiated equipment in the light of the practical experience in electric power supply system design for the automated oil pipelines which have been constructed in China. In addition, necessary illustrative diaglams are given to indicate the interfaces between automation and the key equipment like transformation and distribution equipment, pumps ana valves, which can be used as reference for those who shall undertake the design for a station power supply system, the operators and the managerial personnel.