| The integrated automation is of automation, computer and communication technologies used in the substation. It's active meaning to carry out reformation of old 220 kV substations to improve operation mode and boost automation level and consolidate safe operation. Firstly, this paper deals with the types, functions and development of the substation integrated automation system, introduces new techniques including the system' s configuration, performance, communication and protocol etc.. The future development trend of the substation integrated automation system is also forecasted. Secondly, the status quo of the substation automation is presented in the aspects of communication network and equipment lockout and staff management. Common problems existing in these aspects are analyzed, and settlement suggestions are put forward. Combining the problems existing in the reformation of integrated automation system in a substation, the principles and the points needing attention are discussed in type selection according to the function, structural type, network protocol and transfer protocol.
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