中文摘要：

针对主动移频式孤岛检测法在特定负载条件下容易导致孤岛检测失败的问题，分析其检测盲区的产生机理并给Ⅲ消除检测盲区的应对策略，即根据所测逆变器输出端电压与逆变器输出电流的相差大小，对孤岛检测算法中的相关参数值进行自动调整。仿真和实验结果表明，采用所提检测盲区消除策略的改进方法与传统主动移频法相比孤岛检测性能有明显提高，在负载品质因数很高的情况下能消除孤岛检测的盲区。

英文摘要：

In view of the failure of islanding detection for active frequency shift method under certain load conditions, analyses the generation mechanism and eliminating strategy of non-detection zone was analyzed. That is to adjust automatically the relevant parameters of islanding detection algorithm according to the measured value of phase difference between output terminal voltage and output current of inverter. Simulation and experiment results showed that the improved method which adopts the proposed strategy of eliminating non-detection zone has significantly improved performance compared with the traditional active frequency shift islanding detection scheme, and can eliminate the nondetection zone in the case of high quality factor load.