Estratégias de controle e operação de filtros ativos de potência paralelos.

Abstract

This master thesis presents a study of a Shunt Active Power System Filter (FAPS). The work describes the problems variety faced in the electric distribution systems, related with the quality of energy. The study approaches a particular configuration of Active Power System Filter, Shunt Active Power System Filter, discoursing the control problem and project at circuits implementation. The work has as contribution a comparative study of methods of phase detection and presents a new algorithm, capable to reject high order harmonics, low order harmonics, variations in the grid frequency and unbalanced conditions. The algorithm has a small computational load. It is also presented a transient study of configuration Shunt FAPS, that gives a project tools to the passive (inductors and capacitors) and actives (power keys and diodes) circuit components, through the load specifications. The system modelling is presented, that serves as project parameter of the currents controllers and the link dc controller. Finally, i t is presented experimental results of the prototype mounted in the laboratory, working with proposed synchronization algorithm. In the prototype the control method dq (time domain) and FFT (frequency domain) are implemented, and experimental results are discussed.