Metodologia para desenvolvimento de sistemas interoperáveis em redes elétricas inteligentes baseada em Use Cases, SGAM, CIM e FIPA

Abstract

Technological development has been marked by the rise of numerous devices that are increasingly taking the lead in automation of functions related to supervision, control, protection, data acquisition and power system management. In this context of complex systems, resulting from the convergence of systems from several domains, the concept of Smart Grid emerges. The integration of new technologies with legacy ones, however, imposes a series of challenges, such as: the need for a clear dialogue between stakeholders from different areas of interest (manufacturers, regulators, costumers and others); the proper identification of available standards and specifications; and the development of intelligent, scalable, interoperable and secure systems. This work addresses a methodology for the System Development Life Cycle within the Smart Grid framework, integration- and interoperability-oriented and based on international standards such as IEC 62559 Use Cases Methodology, Smart Grid Architecture Model (SGAM), Common Information Model (CIM), FIPA (Foundation for Intelligent Physical Agents) specifications, and conformance and interoperability tests according to ETSI (European Telecommunications Standards Institute) recommendations. The use case methodology from IEC 62559 series is a document-oriented technique that formalizes stakeholders’ requirements; SGAM, developed by CEN/CENELEC/ETSI, enables the visualization of Use Cases and the specification of system architecture in an interoperable way; CIM, from IEC 61970/61968/62325 standards, models messages and information objects for interoperable information exchange; and FIPA-based multi-agent systems enable an implementation solution for intelligent systems. As a case study, the methodology is applied to a FLISR Multi-Agent System, intended for distribution substations and medium voltage distribution systems and developed within the Smart Grid Group (GREI) of the Federal University of Ceará. The application of the new methodology proved to be important for the identification of new system requirements, triggering suggestions for minor changes in the original project in order to improve adherence to international standards for smart grids interoperability.