Prevention Techniques of Grid-tied Solar Photovoltaic System under Islanded Mode

In islanding conditions, a micro grid is isolated from the main grid at the Point of Common Coupling (PCC). The purpose of this study is to determine the islanding condition of the micro grid from the main grid and then analyze the different anti - islanding prevention schemes under the islanding mode of a micro grid. Different methods include the switching of circuit breakers and applying various grid faults. Different relays are used to check the performance of various anti-islanding techniques. This study also compares the detection time of different relays for anti-islanding protection devices and their effect on grid voltage, current, and power.