comparison of extremum-seeking control techniques for maximum power point tracking in photovoltaic systems比较extremum-seeking控制技术在光伏系统最大功率点跟踪.pdfVIP

Energies 2011, 4, 2180-2195; doi:10.3390/en4122180 OPEN ACCESS energies ISSN 1996-1073 /journal/energies Article Comparison of Extremum-Seeking Control Techniques for Maximum Power Point Tracking in Photovoltaic Systems Her-Terng Yau * and Chen-Han Wu Department of Electrical Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan; E-Mail: wu.chese@ * Author to whom correspondence should be addressed; E-Mail: htyau@.tw; Tel.: +886-47229; Fax: +886-4 Received: 8 October 2011; in revised form: 22 November 2011 / Accepted: 6 December 2011 / Published: 8 December 2011 Abstract: Due to Japan’s recent nuclear crisis and petroleum price hikes, the search for renewable energy sources has become an issue of immediate concern. A promising candidate attracting much global attention is solar energy, as it is green and also inexhaustible. A maximum power point tracking (MPPT) controller is employed in such a way that the output power provided by a photovoltaic (PV) system is boosted to its maximum level. However, in the context of abrupt changes in irradiance, conventional MPPT controller approaches suffer from insufficient robustness against ambient variation, inferior transient response and a loss of output power as a consequence of the long duration required of tracking procedures. Accordingly, in this work the maximum power point tracking is carried out succes