Micro-grid islanding detection based on PQ active method

Micro-grids are being developed as a building block for future smart grid system. Islanding detection is a great challenge in connecting distributed generation (DG) in electrical power systems. Islanding detection methods are categorized into two groups, i.e., communication based methods, active, and passive methods. Communication based methods are established upon communication between utilities and DGs and have the inconvenience of being expensive and are limited in use. Active methods perturb the system with a disturbance and the system response to the disturbance is analyzed. This detection circuit model of the micro-grid islanding is simulated by the software of MATLAB/Simulink, and the simulation results show that the islanding detection method does achieve the effect of the micro-grid islanding detection.