A simple circuit to improve the power yield of PV array during partial shading

Salam, Zainal and Ramli, Mohd zulkifli (2012) A simple circuit to improve the power yield of PV array during partial shading. In: Energy Conversion Congress and Exposition (ECCE), 2012 IEEE, Sept 2012, Raleigh, NC.

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Abstract

In a typical photovoltaic (PV) power system, when part of the PV module is shaded, the bypass diode is activated to protect the module from hot-spot damages. As a result, the output power is reduced significantly because the power generated from the shaded module is totally unusable. In this paper, a simple circuit is proposed to increase the power yield of PV system under partial shading condition. The idea is to recover the power generated by the shaded module and then process it using power electronics circuit to become part of the output power. Consequently, the inclusion of the circuit enables the system to deliver more power compared to the bypass diode method. The concept is evaluated using Matlab-Simulink simulation and proven using an experimental test rig. The performance of the proposed circuit is compared with (1) PV system with bypass diode and (2) micro-inverter. The results show marked improvement in the efficiency, especially under heavy partial shading condition.

Item Type:	Conference or Workshop Item (Paper)
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:	06 Mar 2014 04:30
Last Modified:	28 May 2015 04:19
URI:	http://eprints.utem.edu.my/id/eprint/11692
Statistic Details:	View Download Statistic

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