This paper proposes active Islanding Detection (ID) method based on Gaussian Modulated Signal (GMS) injection. The small-signals are added to the inverter’s modulation indexes in order to cause voltage disturbances at Point of Common Coupling (PCC), where the Rate of Change of Frequency (ROCOF) is monitored. This plug-in approach can be easily incorporated into the converter’s control law, and does not degrade the power quality. To show the effectiveness of the method, it is tested under several power mismatch scenarios, as well as under asymmetrical faults to prove the technique’s robustness against false trips. In addition, a comparison with the standard (ROCOF) relay is performed and the power quality indexes evaluated.

本文提出了一种基于高斯调制信号（GMS）注入的主动孤岛检测（ID）方法。小信号被添加到逆变器的调制指数中，以在公共耦合点 (PCC) 处引起电压扰动，其中频率变化率 (ROCOF) 受到监控。这种插入式方法可以很容易地融入转换器的控制律中，并且不会降低电能质量。为了证明该方法的有效性，在几种功率不匹配情况下以及不对称故障下对其进行了测试，以证明该技术对误跳闸的鲁棒性。此外，还与标准（ROCOF）继电器进行了比较，并对电能质量指标进行了评估。