The technology of secondary equipment condition diagnosis and failure functional recovery could improve security, stability and effectiveness in smart substation. The development of status diagnosis and trends is summarized , and outstanding issues are discussed. The program of state diagnosis and failure function recovery are proposed on the basis of exiting technology; diagnosis model based on TEC 61850, network device discovery and failure function recovery, etc are mainly studied. The smart substation secondary equipment diagnostic and failure function recovery are explored, which meets the development of mart grid self-healing and self-control.
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