Sliding-mode control for a three-phase unity power factor rectifier operating at fixed switching frequency
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...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/27273 |
| Acceso en línea: | https://hdl.handle.net/2117/27273 https://dx.doi.org/10.1109/TPEL.2015.2403075 |
| Access Level: | acceso abierto |
| Palabra clave: | Sliding mode control Electric inverters Kalman filtering Current control Extended Kalman filter LCL filter Sliding Mode Control Voltage sensorless Computational modeling Kalman filters Load modeling Switches Switching frequency Voltage control Xarxes elèctriques -- Informàtica Kalman, Filtratge de Control automàtic -- Informàtica Àrees temàtiques de la UPC::Energies::Energia elèctrica::Automatització i control de l'energia elèctrica Àrees temàtiques de la UPC::Informàtica::Automàtica i control |
| Sumario: | 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. |
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