Improving Power-Conversion Efficiency via a Hybrid MPPT Approach for Photovoltaic Systems

  • J. Ma University of Liverpool, Xi’an Jiaotong-Liverpool University
  • K. L. Man Xi’an Jiaotong-Liverpool University
  • N. Zhang Xi’an Jiaotong-Liverpool University
  • S. U. Guan Xi’an Jiaotong-Liverpool University
  • P. W.H. Wong University of Liverpool
  • E. G. Lim Xi’an Jiaotong-Liverpool University
  • T. Krilavicius Baltic Institute of Advanced Technology, Vytautas Magnus University
  • J. Kapociute-Dzikiene Baltic Institute of Advanced Technology, Vytautas Magnus University
  • C. U. Lei The University of Hong Kong
Keywords: Photovoltaic effects, power conversion, search methods, estimation

Abstract

This paper presents a hybrid Maximum Power Point Tracking (MPPT) method for improving the power –conversion efficiency of Photovoltaic (PV) generators. By detecting the output power changes caused by environmental reasons, the proposed method performs variable-step online search process with an accurate estimation of the Maximum Power Point (MPP) locus. A PV generator with a Single Ended Primary Inductance Converter (SEPIC) is developed in PSIM to verify the feasibility and suitability of the proposed method. Simulation results show that it can not only deliver a stable reference operating voltage for MPPs at steady state, but also can speed up the searching process under rapidly changing environment conditions.

DOI: http://dx.doi.org/10.5755/j01.eee.19.7.5163

Published
2013-09-09
How to Cite
Ma, J., Man, K. L., Zhang, N., Guan, S. U., Wong, P. W., Lim, E. G., Krilavicius, T., Kapociute-Dzikiene, J., & Lei, C. U. (2013). Improving Power-Conversion Efficiency via a Hybrid MPPT Approach for Photovoltaic Systems. Elektronika Ir Elektrotechnika, 19(7), 57-60. https://doi.org/10.5755/j01.eee.19.7.5163
Section
ELECTRONICS