DISCRETE-TIME CONTROLLERS BASED ON THE INTERNAL MODEL PRINCIPLE FOR SHUNT ACTIVE POWER FILTERS

FERNANDO BOTTERÓN; CARBALLO ROBERTO E.

LATIN AMERICAN APPLIED RESEARCH

PLAPIQUI(UNS-CONICET)

Lugar: Bahia Blanca; Año: 2013 vol. 43

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 (SAPF). The presented control strategy is 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 controller is based on the internal model principle operating with different sampling frequencies, resulting in a downsampled controller, that result in a simple implementation on DSCs (digital signal controllers) with reduced RAM. Furthermore, the proposed strategy improves the transient response for step load disturbances. To validate the presented analysis, simulation results of the transient and steady-state performance are presented.