一种混合低谐无盲区的孤岛检测方法OA北大核心

As a commonly used islanding detection method,the active detection method can reduce the non-detec-tion zone by increasing the disturbance intensity,but it will also increase the degree of harmonic pollution to the grid at the same time.Aimed at this problem,a hybrid fuzzy low-harmonic islanding detection method without non-detection zone is proposed in this paper.First,the non-detection zone is judged,and the passive islanding detection method which has no harmonic pollution to the grid is used preferentially.If this zone is within the non-detection zone of the passive detection method,then a fuzzy low-harmonic islanding detection method with fuzzy disturbance control is used to disturb the output current in its second and fourth quarter periods.Finally,the corresponding simulation model is built to verify the effectiveness of the proposed method.