UNE-EN IEC 61970-302:2018

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 EMSsystems developed independently, or between an EMS system and other systems concernedwith different aspects of power system operations, such as generation or distributionmanagement. SCADA is modelled to the extent necessary to support power system simulationand inter-control centre communication. The CIM facilitates integration by defining a commonlanguage (i.e. semantics) based on the CIM to enable these applications or systems to accesspublic data and exchange information independent of how such information is representedinternally.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 progressed as separateInternational Standards.This particular International Standard specifies a Dynamics package which containsextensions to the CIM to support the exchange of models between software applications thatperform analysis of the steady state stability (small-signal stability) or transient stability of apower system as defined by IEEE / CIGRE Standard Terms and Definitions for Power SystemStability Analysis.The model descriptions in this standard provide specifications for each type of dynamic modelas well as the information that needs to be included in dynamic case exchanges 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 models selected elements along with their attributes are needed to describedynamic 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.