A DSO-driven evaluation of a CIM profile : Development of a CIM profile based on use cases related to monitoring Vattenfalls low voltage network

Sammanfattning: The transition to more renewable energy sources places high demands on the power systems to be more flexible, and makes it grow in complexity. This has led to a growing need of a common format or language for data exchange in power systems because of the growing number of interconnected networks operated by different companies and utilities that need to communicate on a daily basis. The International Electrotechnical Commissions (IEC) Common Information Model (CIM) offers a solution to this with a set of open-source standards for representing components in a power system, describing the relationships between them facilitate data exchange in a common language. Actors within power systems often create their own CIM profiles, which can include all or part of the CIM. Different CIM profiles might lead to interoperability issues and make the information integration more complex. A common solution the implementation of a company specific common CIM profile. Vattenfall is currently in the middle of a roll out of a new smart metering system, which will be installed at both customer side and in secondary substations. This will provide great opportunities to monitor the low voltage network. The overall goal of this project is to identify use cases related to the new smart metering infrastructure from Vattenfall Eldistributions point of view and the required information for the use cases. Based on this a suggestion of a CIM profile that best suits the data exchange for the use cases is to be developed. The use cases identified in the project was loss identification, capacity calculation, power quality monitoring and monitoring secondary substations with sensors. The operational topology was identified as the key source of information since it is needed for all use cases. From the gap analysis two gaps were found. The gaps concerned events related to monitoring with sensors: shunt reactor breaker alarm and water ingression alarm. Which led to the creation of an extension to the CIM to cover the data exchange for these events. One insight from the project was that the CIM profile, even though restricted, became quite extensive. Further restrictions should be made to make it more compact and accessible. Another experience from the project was the slow learning curve of the extensive model. Another insight was that modeling data exchange of the low voltage network with CIM is a new and unexplored field, more research should be done in the area.