Published Paper Details:

Islanding occurs when distributed generators (DGs) only supply electricity to local loads after the disconnected power grid. It has been stated that several islanding detection methods (IDMs) classified as remote, active, and passive can detect this undesirable state. The DG's controller is perturbed in functional approaches, causing a local yardstick to drift outside the acceptable range. Even in well-balanced islands, this disruption improves detection accuracy, but under normal operating conditions, it increases the total harmonic distortion of the output current (THDI). The impact of the modified sliding mode controller on power quality as a novel active IDM for grid-connected photovoltaic systems (GCPVS) with string inverters is investigated in this work. The positive voltage feedback (VPF) approach, a well-known active IDM, compare its performance. This evaluation is carried out for a 1 kW power GCPVS using the MATLAB/Simulink platform by evaluating the output current harmonics, THD, and efficiency under various penetration and disturbance levels. Because it changes the amplitude of the output current, the output data show that the proposed disturbance does not produce harmonics or subharmonics. As a result, it has little effect on power quality. The sliding mode-based IDM's performance is ultimately found to be reliable in terms of islanding detection and power quality