Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Nonlinear Controller Design for Noise Reduction and State Estimation in the Photovoltaic Power Generation System
Authors Il-Song Kim
Page pp.261-267
ISSN 1229-2214
Keywords Photovoltaic system; Maximum power point tracker; Kalman filter; Extended Kalman filter
Abstract This paper proposes a novel sensorless control scheme for a Permanent Magnet Synchronous Motor (PMSM) by using a parallel reduced-order Extended Kalman Filter. The proposed scheme can obtain rotor position and speed by back-EMF that is estimated by reduced-order EKF and save computation time greatly due to using a parallel structure that works by turns every sampling time. Therefore, proposed scheme has merits of conventional EKF, and problems of parameter sensitivity are partially overcome. And proposed scheme can safely estimate rotor speed and position by using new algorithms according to driving regions. Experimental results show the validity of the proposed estimation technique, and to verify the merit of the proposed scheme, a comparison of a new reduced-order EKF algorithm with a conventional EKF algorithm has been also made in terms of computation time.