Ribeiro, Ricardo Lúcio de AraújoMelo, Liviane Catarine Almeida2015-03-032009-05-262015-03-032008-11-19MELO, Liviane Catarine Almeida. Contribuições para a detecção e identificação de faltas em inversores Multiníveis. 2008. 113 f. Dissertação (Mestrado em Automação e Sistemas; Engenharia de Computação; Telecomunicações) - Universidade Federal do Rio Grande do Norte, Natal, 2008.https://repositorio.ufrn.br/jspui/handle/123456789/18566This work presents contributions in the detection and identication of faults in multilevel inverters through the study of the converters behavior under these operation conditions. Basically, the approached fault consists of an open-circuit in any switch of a three-level clamped diode inverter. The converter operation is characterized in the pre and post-fault states. A wave form behavior analysis of the pole voltage, phase current and dc-bus current is also done, which highlights characteristics that allow the detection of failure and, even, under favorable conditions, the identication of the faulty device. A compensation strategy of the approached fault (open-switch) is also investigated with the purpose of maintaining the driving system operational when a failure occurs. The proposed topology uses SCRs in parallel with the internal switches of the inverter, which allows, in some occasions, the full utilization of the dc-busapplication/pdfAcesso AbertoInversores multiníveisDetecção de faltasCompensação de faltasMultilevel invertersFault detectionFault compensationmasterThesisCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA