Practice and trend of DSAS in China

Digital Substation Automation Systems (DSAS), with some form of communication facility on station and/or bay level, have been in service for several decades. In recent years, the application of IEC 61850 is gradually achieved in China. The first application is MMS between station level and bay level, the second one is GOOSE message application in bay level and process level, and the last one is the SMV in process level. The most recent application is IEEE 1588 PTP (Precision Time Protocol) and GMRP (GARP Multicast Registration Protocol). Taking 110kV Dalv substation in Shaoxing, Zhejiang Province as an example, the practice of IEC 61850 applications is introduced.