A new method of islanding detection based on voltage positive feedback

With the rapid development of distributed generation (DG), more and more renewable energy is transformed into power through grid-connected inverters. Islanding detection is the key technology of the grid-connected inverter. Because of the shortcomings of the traditional voltage positive feedback islanding detection method in the power balancing, a new method for the detection of the voltage positive feedback is proposed in this paper. The method has the advantages of no blind area, little influence on the power quality, simple and convenient algorithm, fast detection speed, and so on. Feasibility and effectiveness of the proposed method are verified by simulation and experiments.