An analysis of the harmonic controller robustness in LV active filters

One component of active power filters is the controller, whose design can determine the overall performance of the filter. Among different active filters control strategies, there is one configuration with generally accepted good performance: the harmonic controller. Its robustness against the measurements is evaluated in this paper for two different implementations. The overall performance of the control section of the active filter is analyzed taking into account the current and voltage measurement uncertainties For comparison purposes, the classical PI controller is also analyzed. Based on numerical simulation data, it is concluded that for similar active filter design, the control method based on harmonic controllers implemented on the synchronous referential is more appropriate.