Estudo comparativo e implementação de métodos de anti-ilhamento para sistemas de geração distribuída com fonte solar

Abstract

The purpose of this work is to present a comparative analysis among different anti-islanding techniques considering three fundamental criteria: Non-Detection Zone (NDZ), Harmonic Distortion and the grid interruption detection time. Firstly, were provided data that justify the importance of promoting a gradual transformation over the global energy matrix, based on the replacement of the non-renewable resources. Subsequently, the main information regarding to the adoption of photoelectric generation is analyzed. Chapter 2 will be aimed at the Grid-Tie Photovoltaics Systems (GTPS) and will cover the topics related to the control of the inverters and the Standards that determine the minimum qualitative and safety criteria that the GTPS inverters must reach. The normative texts considered were: ABNT NBR 16149, IEEE 929-2000, IEEE 1547-2003 and ABNT NBR 62116. Chapter 3 presents a summary of the anti-islanding theory, considering the main causes and consequences of the phenomenon, the Non-Detection Zone (NDZ) mapping methodologies and a brief bibliographic summary of the works found in the technical literature. Beyond that, it was proposed a new Active Anti-Islanding Method based on the frequency positive feedback. Chapter 4 will present the computational results of the selected methods and Chapter 5 will present the experimental results. It was found that the proposed method achieved equal or better results than the other studied Anti-Islanding strategies with the reduction of the NDZ, of the detection time and of the current harmonic content.