Navegando por Autor "Lima Júnior, Valdomiro Ferreira de"

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Desenvolvimento de um procedimento para testes e análises de proteção em IED SEL-751A com auxílio da maleta de testes CE-6710 em ambiente industrial
(2024-06-07) Lima Júnior, Valdomiro Ferreira de; Araújo, Marcel Ayres de
Technological development has played a crucial role in the transformation of the Electrical Power System (SEP) and, consequently, in the industry, improving protection devices to ensure greater continuity and reliability for the supply of electrical energy to consumers. Intelligent Electronic Devices (IEDs) stand out as fundamental pieces in the protection of electrical systems from energy projections, as well as in substations and industrial plant installations, promoting automation and real-time monitoring, and offering functions from protection shifting to operational integrity. Considering the increasing complexity of electrical systems in industry, the implementation of robust procedures becomes necessary to maintain their integrity and the continuity of their processes, in addition to contributing to operational efficiency. Thus, the objective of this study is to contribute to the development of a protection testing procedure and parameter settings for IEDs used in the scope of applications for an industrial plant based on the IED SEL-751A, thus enabling an increase in reliability of the electrical systems, investigative analysis of possible operational problems of the device, and guarantee of operational safety, directly reflecting on productivity and industrial performance. To this end, the work proposes a gradual methodology to carry out tests on the IED SEL-751A, establishing its steps such as communication with the device, configuration using the CE-6710 case and parameter adjustments through the Conprove Test Center software in order to guarantee efficiency. and test security. This approach includes the 50/51 overcurrent test, with time and pickup analysis in relation to the protection parameters applied to the relay. Furthermore, a practical case study that occurred in the industry is presented, in which the procedure is applied to investigate an incident that occurred with a Siemens SIPROTEC relay, model 7SJ62, demonstrating the effectiveness and applicability of the principles outlined in this procedure not only for the SEL- 751A, but also for other devices. The test results are then detailed, including the protection curves and the data obtained for the fault simulations. These values are compared with the real and nominal values of each quantity demonstrated, determining whether the relay passes or fails for each fault scenario. missing, and certifying the functionality of the device.