Gestión de mantenimiento de líneas de transmisión de 500kV 50 Hz em la subestación blindada a gas SF6 de la Itaipu Binacional

Abstract

With the modernization of the Protection and Control Systems of the 500KV 50Hz Transmission Lines of the SF6 gas-shielded Substation (GIS), there has been a need to make changes in the way to perform the maintenance in these systems, due to the new concepts and equipment installed with DIGITAL TECHNOLOGY. The new systems installed are based on state-of-the-art IEDs (Intelligent Electronic Devices), whose settings and parameters do not degrade over time. On the other hand, since these digital technology IEDs, with processors, input and output peripherals, communication cards, enable their interconnection with primary and secondary control centers (Microscada and SCADA), including Interconnection between IEDs of different systems through communication protocols including the IEC61850, incorporating to the whole system swichtes to achieve the desired network interconnection and topology, gateways for translation of protocols and engineering stations from which we can access remotely To each element that composes our system and to maintain a database of adjustments and parameters of the functions. All of the above shows that Maintenance Management will require new practices in terms of routine types of tests, in this sense the PICs that are currently in force, periodicity of execution, policy of reserve materials and the profile of the executing staff must be modified, Which should have in addition knowledge on protection of electrical systems, knowledge of networks and communication protocols, database management and everything concerning digital systems.