COMPARISON AND EFFECTIVENESS OF SLIP MODE FREQUENCY SHIFT AND SANDIA FREQUENCY SHIFT ACTIVE METHODS FOR ISLANDING DETECTION IN SINGLE-PHASE GRID-CONNECTED PHOTOVOLTAIC SYSTEMS

Abstract

This paper offers a comprehensive comparison for the effects of two most important active anti-islanding detection methods which are the slip mode shift frequency (SMS) and Sandia frequency shift (SFS). The comparison is proved in detail through the simulation of the proposed single-phase photovoltaic (PV) system in the Matlab/Simulink. The obtained results show that islanding operation can be successfully detected and prevented using the studied active methods with adequate values for grid power and local load quality factor. In addition, adequate parameters of each method lead to reduce the non-detection zone (NDZ) and prevent the failure of the studied methods.