8-12 July 2013
Africa/Johannesburg timezone
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Comparison of indoor and outdoor current-voltage characterisation of photovoltaic modules

Presented by Ms. Jacqui CROZIER on 12 Jul 2013 from 09:20 to 09:40
Type: Oral Presentation
Session: Applied
Track: Track F - Applied Physics

Abstract

Photovoltaic modules are specified based on their power output and thus it is very important that the maximum power (Pmax), voltage (V) and current (I) of photovoltaic (PV) modules be accurately determined. The power measurements are made at standard test conditions (STC) of irradiance (1000W/m2), temperature (25°C) and spectral distribution (AM 1.5). Temperature and irradiance can be corrected within a certain range but spectral distribution is related to the atmospheric conditions and tilt of the earth. Indoor PV module testing allows the performance parameters of a module to be determined under controlled conditions. The current-voltage (I-V) characteristic are determined by measuring the current and voltage of the module with a varied load either outdoors in natural sunlight or using a xenon flash lamp in a solar simulator. The solar simulator takes all these measurements during the very short period of time the light flash. In this paper indoor and outdoor testing procedures are presented and compared, and advantages and disadvantages of the two approaches are discussed. The uniformity of intensity of the flash light over the test area is investigated and discussed. I-V curves acquired using the different methods will also be presented and discussed.

Award

Yes

Level

PhD

Supervisor

Prof E.E. van Dyk ernest.vandyk@nmmu.ac.za NMMU

Paper

Yes

Primary authors

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