Power conversion in concentrating photovoltaic systems: central, string, and micro-inverters
Article first published online: 9 JAN 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Progress in Photovoltaics: Research and Applications
Volume 22, Issue 9, pages 984–992, September 2014
How to Cite
2014), Power conversion in concentrating photovoltaic systems: central, string, and micro-inverters, Prog. Photovolt: Res. Appl., 22, 984–992, doi: 10.1002/pip.2317, and (
- Issue published online: 15 AUG 2014
- Article first published online: 9 JAN 2013
- Manuscript Accepted: 15 OCT 2012
- Manuscript Revised: 14 SEP 2012
- Manuscript Received: 9 APR 2012
- California Energy Commission. Grant Number: PIR-07-016
In this paper, concentrating photovoltaic (CPV) systems coupled with various inverter configurations are modeled, compared, and tested. Because CPV systems use optics to concentrate sunlight onto highly efficient PV cells, the systems are affected not only by mismatches in the I–V characteristics among individual PV cells but also by the electro-optical mismatches of each concentrator. The best way to minimize power losses by these mismatches is having higher quality controls in aligning at the time of manufacturing and installation. To mitigate the power losses when mismatches are present, electrical components can be considered at the expense of additional cost. The developed models for central, string, and micro-inverters allow an accurate estimation of power losses in CPV systems and can be used to find an optimum solution for various power conversion schemes on the basis of the given mismatch conditions. Simulation results show that a CPV system with micro-inverters outperforms a CPV system with conventional inverters. Experimental test results under normal operation validate that power losses in a CPV system can be reduced by more than 5% by using the micro-inverter scheme. Copyright © 2013 John Wiley & Sons, Ltd.