Improved Active Islanding Detection Technique with Different Current Injection Waveform

The active frequency drift (AFD) method is an effective to detect islanding in grid-connected photovoltaic systems. However, it has some inherent drawbacks, such as generating higher harmonics. In order reduce the harmonics and non-detection zone (NDZ), various improved AFD methods have been proposed, but they still suffer from high reduced detection speed. To overcome these limitations, this paper proposes innovative technique based on AFD. Analysis reveals that proposed reduces by 68% compared conventional a larger chopping factor. Therefore, offers several distinct advantages, including accelerated speed, NDZ harm caused disturbances, power quality. Furthermore, verify harmonic impact of method, simulations analyses are conducted using simulation software Matlab/Simulink. An experimental prototype set up Laboratory. results demonstrate superiority method.