Case Study Qinjiandao 220kV Intelligent Substation in Tianjin City Qinjiandao 220kV substation is located in Hongqiao district, Tianjin city in north China. In the past, this substation was an or- dinary substation running based on legacy protection relays and measuring instruments. CS 202E The successful modernization of the Qinjinadao substation greatly helped our customer with gathering many important experiences on IEC61850 substa

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