Metodologia para ensaios de modelo de sistemas de proteção de geradores síncronos utilizando simulador digital em tempo real

Abstract

Power utility companies have been investing, over the last years, in simulations, models and tests enhancements related with protection and control systems, mainly equipment used in the National Interconnected Electrical System. In this context, the application of Real Time Digital Simulator (RTDS®) for model-based tests is becoming more common. The RTDS® allows running simulations of a specific power system, which interacts with protection and control equipments in a closed-loop operation. Despite the experience of utilities in testing the protection of power lines, model-based tests of synchronous generator protection are a relatively unknown and unexplored area by the utilities, mainly because of the lack of specific literature and experience in their application. The objective of this dissertation is to establish a methodology for the model-based tests of generator protections from the identification of simulated cases and their relevance as well as to describe modeling steps, necessary arrangements to perform those tests and analysis of results. A case study of Jaguara Hydro Power Plant, owned by Cemig Geração e Transmissão S.A., was performed to evaluate the generator protection relays performance using the proposed methodology.