Detección e identificación de fallas internas para sistemas solares fotovoltaicos conectados a micro-redes en AC basado en el método de la transformada de Park

Abstract

When a solar PV generation system is implemented, it is necessary to employ a converter. It is employed in order to join the DC power generated by PV panels and the AC network. Those conversion elements are considered as an infrastructure stage. This stage could be susceptible to internal failures occurrence. The failures can affect the overall performance of the power system. There are lots of techniques and methods that allow the detection and identification of failures in micro-grids. This research presents a method to detect failures in the power elements that integrate the voltage converters. The proposal employs Park’s transform and vectorial analysis. In order to probe the method, the authors employ scenarios and four kinds of operation. They allow to test the proper functioning of the present proposal. They also probe the usage of mentioned vectorial analysis. Thus, it is obtained a capable instrument to detect and identify internal failures. The failures occur in the conversion systems that are associated with photovoltaic generators. Both tasks are executed when current signals are analyzed. The obtained results have been generated, proven and analyzed through Matlab and Simulink software. The gathered results come from a micro-grid model.