Sliding-Mode Control for a Three-Phase Unity Power Factor Rectifier Operating at Fixed Switching Frequency
作者： Ramon Guzman , Luis Garcia de Vicuna , Javier Morales , Miguel Castilla , Jose Matas
DOI: 10.1109/TPEL.2015.2403075
关键词:
摘要: This paper presents an improved variable hysteresis-band 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 independent Kalman filters. use of filters instead nonadaptive state observer improves the quality estimated signals presence noise, increasing immunity loop noisy environments. To reduce drastically computational load algorithm, reduced bilinear model derived which allows to filter extended filter. A fast output-voltage also presented avoids variations when sudden change or voltage sag appears. Moreover, fixed switching frequency uses combination decision ensuring spectrum concentrated around desired frequency. overall proposal has been fully integrated into digital signal processor. Selected experimental results are introduced validate theoretical contributions this paper.
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