Energy management system application program interface (EMS-API) - Part 302: Common information model (CIM) dynamics
International Electrotechnical Committee
The common information model (CIM) is an abstract model that represents all the majorobjects in an electric utility enterprise typically involved in utility operations. By providing astandard way of representing power system resources as object classes and attributes, alongwith their relationships, the CIM facilitates the integration of energy management system(EMS) applications developed independently by different vendors, between entire EMSsdeveloped independently, or between an EMS and other systems concerned with different
aspects of power system operations, such as generation or distribution management. SCADAis modelled to the extent necessary to support power system simulation and communicationbetween control centres. The CIM facilitates integration by defining a common language (i.e.semantics) based on the CIM to enable these applications or systems to access public dataand exchange information independent of how such information is represented internally.Due to the size of the complete CIM, the object classes contained in the CIM are grouped intoa number of logical packages, each of which represents a certain part of the overall powersystem being modelled. Collections of these packages are being developed as separateInternational Standards.This particular document specifies a Dynamics package which contains extensions to the CIMto support the exchange of models between software applications that perform analysis of thesteady-state stability (small-signal stability) or transient stability of a power system as definedby IEEE / CIGRE Definition and classification of power system stability IEEE/CIGRE joint taskforce on stability terms and definitions.The model descriptions in this standard provide specifications for each type of dnamic modelas well as the information that needs to be included in dynamic case exchangs betweenplanning/study applications.The scope of the CIM extensions specified in this standard includes:• standard models: a simplified approach to describing dynamic models, where modelsrepresenting dynamic behaviour of elements of the power system are contained inpredefined libraries of classes which are interconnected in a standard manner. Only thenames of the selected elements of the models along with their attributes are needed todescribe dynamic behaviour.• proprietary user-defined models: an approach providing users the ability to define theparameters of a dynamic behaviour model representing a vendor or user proprietarydevice where an explicit description of the model is not provided by the standard. Thesame libraries and standard interconnections are used for both proprietary user-definedmodels and standard models. The behavioural details of the model are not documented inthe standard, only the model parameters.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 57 |
