A Discrete-Time Robust Adaptive Controller Applied to a Bidirectional Isolated Converter

• Autor(a) principal: Carvalho, Edivan Laercio
• Data de Publicação: 2018
• Outros Autores: Tambara, Rodrigo Varella, Cardoso, Rafael, Michels, Leandro
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Biblioteca Digital de Teses e Dissertações do UFSM
• Texto Completo: http://repositorio.ufsm.br/handle/1/30498
• topic: Adaptive Control; Biderectional Converters; Battery Charger; Charger Controllers; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA

The insertion of batteries with low voltage levels and high charge capacity is of great interest for application in microgrids, mainly on assist the regulation of high voltage DC links, used to integrate power generation sources and batteries. The solution for this application are the use of bidirectional converters that operate like as charge/discharge controllers with high voltage gain. In this application, controllers with fixed gains based on average models, cannot guaranteed high performance due the variations on batteries state of charge and disturbances on the DC link loads. A solution are purposed in this work, where are applied an adaptive controller in battery discharge mode, critical case due the necessity to representation the system by small-signal models. Adaptive controllers are interesting because they are not depend directly on such models. Results obtained by simulations demonstrate that this strategy guaranteed robustness and high performance against parametric variations.