Abstract: By defining the basic package set of the common information model（CIM）,the IEC 61970 series standards provide a logical view as well as data structure for the information in energy management systems.Based on the studies of CIM in IEC61970 series standards and complying with CIM semantics and extension criterion,this paper extends the original CIM by developing CIM extension model of wind power generation,photovoltaic power generation and energy storage system for applying to the design of grid energy management systems containing wind-photovoltaic-energy storage to provide a unified interface for further development of advanced energy management system application.