Normalised Efficiency of Photovoltaic Systems: Going beyond the Performance Ratio

This article introduces the normalised efficiency of photovoltaic modules and systems as a performance monitoring metric, and its similarity to the Performance Ratio is shown. Detection of shading and cloudinduced fluctuations using the normalised efficiency are presented. From module temperature measurements, it is possible to calculate a system temperature coefficient, which then serves for temperature-compensated system analyses, and may serve to identify otherwise hidden temperature-dependent behaviour in the system studied. A modification and alternative measurement and calculation route to obtain coefficients for the modelled normalised efficiency is given, and validated using three photovoltaic systems.

Jaar van publicatie:2017

BOF-keylabel:ja

IOF-keylabel:ja

BOF-publication weight:1

CSS-citation score:1

Authors from:Government, Higher Education