Evaluation of active frequency drift anti-islanding methods with a single-phase grid-tie photovoltaic inverter

The increasing number of distributed generators connected to the distribution grids requires islanding detection methods that guarantee the disconnection of generators during grid faults and unintentional island situations. Many anti-islanding techniques have been developed to satisfy this necessity. This paper evaluates two frequency-drift anti-islanding methods used with a single-phase grid-tie photovoltaic (PV) inverter.