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A Simple Energy Recovery Scheme to Harvest the Energy from Shaded Photovoltaic Modules During Partial Shading

Ramli, Mohd zulkifli and Zainal, Salam (2014) A Simple Energy Recovery Scheme to Harvest the Energy from Shaded Photovoltaic Modules During Partial Shading. IEEE Transactions on Power Electronics. 0-1. ISSN 0885-8993 (Submitted)

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Abstract

This paper proposes a simple circuit to recover the energy that otherwise would be lost due to the partial shadings on PV modules. Since the circuit can be readily retrofitted to an existing PV system, no modification on the central inverter is required. The main idea of the scheme is, during partial shading, parts of the current from the non-shaded modules are harvested by an energy recovery circuit using power electronics switches and storage components. In doing so, the current of the PV string is maintained on the level generated by the shaded module. There is no need for the shaded module to be short-circuited; as a result, it can still actively produce output power (despite being partially shaded). To investigate the idea, the proposed circuit is retrofitted to a prototype PV system using eight modules. The partial shading conditions are emulated using a solar simulator with a controllable irradiance capability. The results are validated by a good agreement between the experimental and simulation works.

Item Type: Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Electrical Engineering > Department of Power Electronics & Drives
Depositing User: Mohd Zulkifli Ramli
Date Deposited: 03 Mar 2014 05:01
Last Modified: 28 May 2015 04:18
URI: http://eprints.utem.edu.my/id/eprint/11579

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