Analysis of active islanding methods for single phase inverters

This paper presents the analysis and comparison of the main active techniques for islanding detection used in grid-connected single phase inverters. These techniques can be divided into two classes: techniques introducing positive feedback in the control of the inverter and techniques based on harmonic injection by the inverter. The algorithms mentioned in this work are simulated in PSIM™ in order to make a comparative analysis and to establish their advantages and disadvantages according to IEEE standards.