Técnicas de estimação de irradância a partir de dados de módulos fotovoltaicos.

Abstract

In this work four irradiance estimation techniques will be discussed, compared and tested for use as photovoltaic module monitoring tools. The estimation techniques studied are based on the simpliĄed photovoltaic module model, a one-diode Ąve-parameter model, as well as a modiĄed model in which the modelŠs anti-parallel diode is replaced by an external control current source. For all selected irradiance estimation techniques, information from the photovoltaic panel manufacturerŠs data sheet is required, as well as voltage, current and for three of the four estimators, temperature measurements. For the measurement and acquisition of voltage and current data, two diferent equipaments will be used, these being PROPFITEST PV and SolarModule LED-Flasher. Throughout this work will be present the estimation results obtained for the four irradiance estimators considering two photovoltaic modules of diferent models (Astronergy ASM6610P-260 � � and KYOCERA KC130TM) under normal operating conditions and subsequently using the KC130TM panel under the induced shading condition. At the end of this work the obtained irradiance results will be expressed under two diferent error metrics, in order to identify the irradiance estimation technique whose results are closest to the measured irradiance values.