中文摘要：

针对单相光伏并网逆变器的特点，提出一种在静止坐标系下单相光伏并网逆变器的灵活功率控制方法。通过双阶广义积分算法得到与电网电压同相以及滞后电网电压90°的2个正交电网电压。在静止两相坐标系下通过比例准谐振控制实现对给定电流的快速跟踪。实验结果表明：该控制方法可实现有功功率和无功功率的解耦控制，系统具有良好的静态、动态性能。

英文摘要：

According to the feature of single-phase photovoltaic （PV） grid-connected inverter, a flexible power control method for single-phase PV grid-connected inverter in stationary coordinate system is proposed. Two orthogonal voltages, one of which is of the same phase as grid voltage and the phase of another one lags behind the grid voltage by 90°, are obtained by second order generalized integral （SOGI） algorithm, and the fast tracking of given current can be implemented by proportional quasi-resonant （PQR） controller in the two-phase stationary coordinate system. Experimental results show that using the proposed control method the decoupling control of active and reactive power can be realized, and the control system possesses good static and dynamic performances.