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Latin American applied research
versão impressa ISSN 0327-0793versão On-line ISSN 1851-8796
Resumo
BOTTERON, F e CARBALLO, R. E. Discrete-time Controllers Based On The Internal Model Principle For Shunt Active Power Filters. Lat. Am. appl. res. [online]. 2013, vol.43, n.3, pp.205-211. ISSN 0327-0793.
This paper presents an analysis and design of discrete-time controllers based on the internal model principle, applied to shunt active power filters. The presented control strategies are aimed to compensate the current harmonics produced by nonlinear loads connected to the point of common coupling in low voltage power grids. The proposed current controllers are based on the internal model principle operating with different sampling frequencies and for even and odd or only odd harmonics. It is demonstrated that the use of a downsampled rate, and fewer poles in the internal model, results in a straightforward digital implementation; improvement of the transient response; increasing of the stability margin of the closed-loop system and it is possible to obtain source currents with reduced total harmonic distortion. To validate the above claims and demonstrate the steady-state and transient performance, simulation results are presented
Palavras-chave : Shunt Active Power Filter; Instantaneous Power Theory; Internal Model Principle; Downsampled Controller.