Fault detection in a three-phase system grid connected using SOGI structure to calculate vector components

Abstract

Fault detection algorithms are very important in grid connected systems. They are used to analyze a three-phase system behavior in real time. When something wrong happens, they start some procedures to avoid the collapse. A three-phase system cannot be considered a simply sum of three independent phases, which leads us to apply some vector transform to obtain a more elegant representation of systems. A control system grid connected is based on the vector transform. In this paper we analyze a fault detection performance between some vector transform algorithms, and present a good way to accomplish these transforms using a SOGI (Second Order Generalized Integrator).