Diseño e implementación de un sistema instrumental para el monitoreo de irradiancia horizontal global e irradiancia horizontal difusa para la estimación de irradiancia normal directa.

Abstract

In Ecuador, there are not enough terrestrial measurements of solar radiation to guarantee whether a large-scale photovoltaic project is viable or not. There are only solar maps, which base their results on satellite measurements that do not have the same validity. In this project, a solar irradiance monitoring system is designed and built based on an RSR radiometer that is in charge of monitoring the three irradiance components GHI, DHI, and DNI. The prototype is made up of a pyranometer based on a photodiode, an RSR-type mechanical system and an electronic system made up of two embedded systems, which are responsible for data acquisition and data recording, respectively. An algorithm is implemented to correct the DHI and an algorithm to find the relative position of the sun, important data for the calculation of the DNI. The irradiance values are stored in a database (data that can be downloaded for later analysis) and are displayed on a Web page and in an HMI developed in LabVIEW 2020.