This paper presents an improved variable hysteresisband current-control in natural frame for a three-phase unity power rectifier. The proposed control algorithm is based on three decoupled sliding-mode controllers combined with three independent Kalman filters. The use of Kalman filters instead of a non-adaptive state observer improves the quality of the estimated signals in presence of noise, increasing the immunity of the control loop in noisy environments. To reduce drastically the computational load in the Kalman algorithm, a reduced bilinear model is derived which allows to use a Kalman filter algorithm instead of an extended Kalman filter. A fast output-voltage control is also presented which avoids output-voltage variations when a sudden change in the load or a voltage sag appears. Moreover, a fixed switching frequency algorithm is proposed which uses a variable hysteresis-band in combination with a switching decision algorithm, ensuring a switching spectrum concentrated around the desired switching frequency. The overall control proposal has been fully integrated into a digital signal processor. Selected experimental results are introduced to validate the theoretical contributions of this paper. ; Peer Reviewed ; Postprint (author’s final draft)
Sliding-mode control for a three-phase unity power factor rectifier operating at fixed switching frequency
11.02.2015
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Àrees temàtiques de la UPC::Energies::Energia elèctrica::Automatització i control de l'energia elèctrica , Kalman filters , Electric inverters , LCL filter , Kalman filtering , Voltage control , Control automàtic -- Informàtica , Sliding mode control , Computational modeling , Switching frequency , Extended Kalman filter , Filtratge de , Àrees temàtiques de la UPC::Informàtica::Automàtica i control , Xarxes elèctriques -- Informàtica , Voltage sensorless , Current control , Switches , Kalman , Load modeling
Study on Unity-Power-Factor PWM Rectifier with Fast Dynamic Response
British Library Online Contents | 1997
|Passivity-based Sliding Mode Nonlinear Control of PWM Rectifier
British Library Online Contents | 2012
|Fixed Switching Period Discrete-Time Sliding Mode Current Control of a PMSM
BASE | 2017
|Active sinusoidal rectifier using a fixed switching pattern
British Library Conference Proceedings | 1996
|