A visualization is presented about how to realize the self-description
plug and play in SAS application for an IED based on IEC 61850 standard
the key features being objectoriented modeling
abstract service interface and some self-describing service of manufacturing message specification (MMS). A prototype is put forward to implement dynamic modeling of the substation server. The data flows between each module and some class definition are described. As an independent module
the prototype can be developed separately and independently because it just involves a small part of services of MMS.