PI-STA cascade controller tuning for active power filter applications

• Main Authors: R. Terán, J. Pérez, J. Beristáin, V. Cárdenas
• Format: Article
• Language: Spanish
• Published: Universitat Politecnica de Valencia 2020-04-01
• Series: Revista Iberoamericana de Automática e Informática Industrial RIAI
• Subjects: filtros activos; inversores; electrónica de potencia; control en cascada; control en modos deslizantes; calidad de la energía
• Online Access: https://polipapers.upv.es/index.php/RIAI/article/view/12403

Typically, the control scheme of the active power filter corresponds to a cascade controller, which consists of an outer loop for dc voltage regulation and an inner loop for the tracking of a reference current. Each control loop must be associated with controllers that allow a fast convergence to the established references. This paper presents a cascade controller for active power filter applications, employing a proportional-integral (PI) controller for the external loop, and the super-twisting algorithm (STA) for the internal loop, where the union of both controllers is called PI-STA cascade controller. On the one hand, a step response analysis for the estimation PI gains is carried out. On the other hand, the STA tuning takes place from considering the similarity between the structures of STA with a PI. In order to validate the methodology tuning consistency simulation and experimental results are presented.