61970-301©1EC:2003 11- 1 Scope The Common Information Model(CIM)is an abstract model that represents all the major objects in an electric utility enterprise typically involved in utility operations.By providing a standard way of representing power system resources as object classes and attributes,along with their relationships,the CIM facilitates the integration of Energy Management System (EMS) applications developed independently by different vendors,between entire EMS systems developed independently,or between an EMS system and other systems concerned with different aspects of power system operations,such as generation or distribution management.This is accomplished by defining a common language (i.e.,semantics and syntax)based on the CIM to enable these applications or systems to access public data and exchange information independent of how such information is represented internally. The object classes represented in the CIM are abstract in nature and may be used in a wide variety of applications.The use of the CIM goes far beyond its application in an EMS.This standard should be understood as a tool to enable integration in any domain where a common power system model is needed to facilitate interoperability and plug compatibility between applications and systems independent of any particular implementation. Due to the size of the complete CIM,the object classes contained in the CIM are grouped into a number of logical Packages,each of which represents a certain part of the overall power system being modeled.Collections of these Packages are progressed as separate International Standards.This particular International Standard specifies a Base set of packages which provide a logical view of the physical aspects of Energy Management System (EMS)information within the electric utility enterprise that is shared between all applications.Other standards specify more specific parts of the model that are needed by only certain applications.Section 4.2 below provides the current grouping of packages into standards documents. 2 Normative References The following normative documents contain provisions which,through reference in this text, constitute provisions of this International Standard.At the time of publication,the editions indicated were valid.All normative documents are subject to revision,and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.Members of IEC and ISO maintain registers of currently valid International Standards. [No normative references are defined at this time] 3 Definitions and Abbreviations Refer to International Electrotechnical Vocabulary,IEC 60050,for general glossary definitions. For the purposes of this International Standard,the terms and definitions given in Annex A and the following apply. 3.1 Energy Management System(EMS) A computer system comprising a software platform providing basic support services and a set of applications providing the functionality needed for the effective operation of electrical generation and transmission facilities so as to assure adequate security of energy supply at minimum cost.61970-301  IEC:2003 – 11 – 1 Scope The Common Information Model (CIM) is an abstract model that represents all the major objects in an electric utility enterprise typically involved in utility operations. By providing a standard way of representing power system resources as object classes and attributes, along with their relationships, the CIM facilitates the integration of Energy Management System (EMS) applications developed independently by different vendors, between entire EMS systems developed independently, or between an EMS system and other systems concerned with different aspects of power system operations, such as generation or distribution management. This is accomplished by defining a common language (i.e., semantics and syntax) based on the CIM to enable these applications or systems to access public data and exchange information independent of how such information is represented internally. The object classes represented in the CIM are abstract in nature and may be used in a wide variety of applications. The use of the CIM goes far beyond its application in an EMS. This standard should be understood as a tool to enable integration in any domain where a common power system model is needed to facilitate interoperability and plug compatibility between applications and systems independent of any particular implementation. Due to the size of the complete CIM, the object classes contained in the CIM are grouped into a number of logical Packages, each of which represents a certain part of the overall power system being modeled. Collections of these Packages are progressed as separate International Standards. This particular International Standard specifies a Base set of packages which provide a logical view of the physical aspects of Energy Management System (EMS) information within the electric utility enterprise that is shared between all applications. Other standards specify more specific parts of the model that are needed by only certain applications. Section 4.2 below provides the current grouping of packages into standards documents. 2 Normative References The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. [No normative references are defined at this time] 3 Definitions and Abbreviations Refer to International Electrotechnical Vocabulary, IEC 60050, for general glossary definitions. For the purposes of this International Standard, the terms and definitions given in Annex A and the following apply. 3.1 Energy Management System (EMS) A computer system comprising a software platform providing basic support services and a set of applications providing the functionality needed for the effective operation of electrical generation and transmission facilities so as to assure adequate security of energy supply at minimum cost