A New Two-stage Photovoltaic GMPPT Method under Partially Shaded Conditions

DOI

10.2991/icaees-15.2015.163How to use a DOI?

Keywords

Photovoltaic; Solar Energy; Partially Shaded Conditions; GMPPT; MPPT; PV System.

Abstract

In a photovoltaic (PV) system that consists of multiple series-connected PV modules with bypass diode, multiple peak points could exist in the P-V curve of the PV system under partially shaded conditions (PSC), causing conventional MPPT methods sometimes unable to track the true global maximum power point (GMPP). In view of this problem, we propose in this paper a new two-stage global maximum power point tracking (GMPPT) method based on the distribution characteristic of the GMPP voltage and the dividing point voltage. The method proposed finds all the possible peak power points and compares the power of those points to find the GMPP in the first stage. In the second stage, the method sets the operation point to the point of the maximum power found in the first stage and uses the hill climbing (HC) method to keep the operation point at that point. The method proposed is validated by simulation. Simulation result shows that this method can track the GMPP effectively.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Shuran Jia
AU  - Qingyong Zhang
AU  - Yang Fang
PY  - 2015/07
DA  - 2015/07
TI  - A New Two-stage Photovoltaic GMPPT Method under Partially Shaded Conditions
BT  - Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015
PB  - Atlantis Press
SP  - 885
EP  - 889
SN  - 2352-5401
UR  - https://doi.org/10.2991/icaees-15.2015.163
DO  - 10.2991/icaees-15.2015.163
ID  - Jia2015/07
ER  -