Study of Different Passive Islanding Detection Techniques and Verification by MATLAB Simulation

摘要

This paper presents a delineation of passive islanding detection techniques. APV-connected microgrid system is studied and simulated in MATLAB/Simulink and a trip signal is generated in case of detection of islanding. Broadly classified, the two methods of islanding detection are remote and local methods. Passive methods being one of local methods that utilize local parameters are used for the analysis. Local parameters at PCC are taken into account and compared with threshold to generate trip signal for breaker so as to disconnect the DG after islanding. Passive islanding detection technique being of the most sophisticated technique in implementation has a great disadvantage of non-detectable zone, still can be used in small system where remote technique becomes cumbersome in implementation.