In this paper, a simplified active islanding detection method based on a power control disturbance signal for a three-phase grid-connected inverter application is presented. The disturbance and observation method is used to simplify the significant indicator, which determines the islanding condition. The control algorithm, which is used to command the observation and disturbance method, is derived from a three-phase grid-connected inverter. The power is easily transferred to the grid by converting it to direct current (DC) and commanding it on the rotating reference frame. The d-axis current command represents the active power, and the q-axis current command represents the reactive power. The power disturbance signal is performed by d-axis harmonic current injection. At the transforming point of common coupling (PCC), the DC component of the harmonic voltage signal can be easily observed by applying a Park transform. The IEEE Std. 1547 is applied to qualify the power-quality guarantee and anti-islanding test requirements. The validity of this approach was confirmed by simulation and experimental results.

本文针对三相并网逆变器应用，提出了一种基于功率控制扰动信号的简化有源孤岛检测方法。扰动和观测方法用于简化重要指标，从而确定孤岛状态。用于命令观测和干扰方法的控制算法是从三相并网逆变器中得出的。通过将其转换为直流（DC）并在旋转参考系上进行命令，可以轻松地将其传输到电网。所述d轴电流命令表示的有功功率，并且q轴电流指令表示无功功率。功率干扰信号由d执行轴谐波电流注入。在公共耦合（PCC）的转换点，可以通过应用Park变换轻松观察谐波电压信号的DC分量。IEEE标准 应用1547来认证电源质量保证和抗孤岛测试要求。仿真和实验结果证实了该方法的有效性。