Based On Iec61850 Substation Automation System Application

Substation automation technology in China has reached a well level after 10 years of development. Currently, nearly all new substations implement substation automation systems despite of their different voltage levels, and many old substations will achieve substation automation by reconstruction. The wide use of substation automation technology improves the modernization of the power grid construction, enhances the abilities of transmission, distribution and power grid dispatching, and reduces the overall cost of the substation construction. With the gradually developed technologies of intelligent switches, photoelectric current-voltage transformers, online detection of the primary operation equipments and the training simulation of the substation operation, the application development of the high-speed computer network in the real-time systems, and the implementation of the IEC 61850 standard set, the digital substation, which collects, transmits and processes all digital information, will become an inevitable trend.This paper firstly describes the development process of the substation automation and the basic concepts of the definition of the substation automation in EC, analyses the status and limitations of the substation automation systems. Then, IEC 61850 series standard and its characteristics are further analyzed. Also, it analyses the research status and specific applications of the IEC61850-based substation automation systems, including the basic characteristics of the unconventional transformers, network communication technology and intelligent breakers, focusing on the information security and specific Countermeasures of the digital substations. In the end, it discusses the difficulties and the limitations in the IEC 61850 applications.