Controle digital bang-bang e PI aplicado ao conversor CC-CC buck-boost: desenvolvimento e implementação de controle digital retroalimentado para tratamento de água em sistema RAS via eletrólise aquosa.

Abstract

Technology plays a transformative role, given its capacity to assist in various endeavors associated with improving human life quality. Considering the importance of water for life development, studying resources that seek alternatives for its efficient use becomes crucial, bearing in mind the possibility of natural resource scarcity. Among these, the various forms of water treatment are concrete examples of such concern. In this sense, the various sciences play an indispensable role in contributions that enable technological advancement and human development. This work consists of the approach and development of an experimental platform for aqueous electrolysis, using techniques and means within the scope of power electronics and digital control. Through this approach, the experimental platform will consist of a buck-boost dc-dc converter with state-space modeling through smallsignal analysis and control of the average current in the inductor by bang-bang and proportional-integral techniques, later associated with digital control via a microcontroller with a graphical user interface for parameter manipulation. Furthermore, experiments are carried out on aqueous electrolysis in the absence and presence of salts, monitoring water quality parameters such as TDS, conductivity, pH, and ORP; during the process triggered by the electrolyzer.