Active Islanding Detection Technique for Current Controlled Inverter in Distributed Generation

The Goal Islanding occurs when a portion of distributed power system becomes electrically isolated from the rest of the power system yet continues to be energized by distributed generators. All such occurrences are needed to be detected as early as possible in order to safely shut down the distributed generators. This is because, continued operation of these generators under islanding can lead to multitude of operational hazards/challenges to the generators and to connected loads. The current industry practice is to disconnect all distributed generators immediately after the occurrence of islands. Typically, a distributed generator should be disconnected within 100 to 300 ms after loss of main supply. To achieve such a goal, each distributed generator must be equipped with an islanding detection device, which is also called anti islanding devices. In this study, an active islanding detection technique is proposed for grid connected inverters. Feasibility of the proposed technique. Proposed project run on MATLAB 2016 Simulink environment.