Definition
CGMES (Common Grid Model Exchange Standard) is ENTSO-EEuropean Network of Transmission System Operators for Electricity - collaborative body for European TSOs coordinating joint grid operations and regulations.'s profile of the IECInternational Electrotechnical Commission - global standards body for electrotechnology and power systems. CIMCommon Information Model - IEC standard for semantic modeling of the electricity system, the basis for data exchange between TSOs across Europe. standard. The relationship is worth stating precisely: CIM is a broad information model covering far more than grid models, whereas CGMES selects exactly the parts European TSOs need in order to assemble a common grid model and run calculations on it. CGMES splits the model into separate profiles with distinct responsibilities - equipment, operational state, topology, power-flow results, plus diagram and geographical information - so a party can submit an updated operational state without resending the entire equipment model. The requirement to deliver grid models in a common format is grounded in the EU network codes, as part of operating the interconnected European power system.