Analysis of the effects of inverter ripple current on a photovoltaic power system by using an AC impedance model of the solar cell

Wook Kim, Van-Huan Duong, Thanh-Tuan Nguyen and Woojin Choi

Renewable Energy, 2013, vol. 59, issue C, 150-157

Abstract: Most of the solar cell models suggested so far mainly employ steady state modeling methods to estimate the characteristic I–V curve of a solar cell at a certain operating point. Thus a study on the dynamic characteristics of a solar cell can rarely be found. For the design of a high performance power conditioning unit, it is essential to have accurate information about the static and dynamic characteristics of the solar cell. In this study an AC impedance model of a solar cell module is developed using Impedance Spectroscopy and it is then used for evaluating the effects of the ripple current generated by a single phase inverter. Experimental results verify that the energy conversion efficiency of a photovoltaic power system may be significantly reduced when the 120 Hz ripple current generated by a single phase inverter is larger than a certain value and an appropriate limit value for the 120 Hz ripple current is also suggested.

Keywords: AC impedance model; Impedance spectroscopy; Ripple current; Single phase inverter; Solar cell (search for similar items in EconPapers)
Date: 2013
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:59:y:2013:i:c:p:150-157

DOI: 10.1016/j.renene.2013.03.035

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