中文摘要：

此处所研究的单相光伏并网逆变器采用的拓扑结构由H桥电路、单电感滤波器和升压变压器等组成。为提高并入电网电流的质量,消除逆变器死区等因素产生的大量低次谐波,提出了一种能够抑制低次谐波的电流控制策略,即自适应谐波补偿的方法,并对相关参数设计进行了详细描述。另外还分析了控制器和自适应滤波器之间的相互作用对系统的动态特性的影响。最终实验证明,该方法能很好地抑制低次谐波,大大提高并入电网电流的质量。

英文摘要：

A single-phase grid-connected photovohaic（PV） inverter topology which consisting of an H-bridge circuit, an in ductive filter and a Boost transformer is considered.To improve the quality of the grid current and eliminate low order harmonics caused by the inverter＇s dead time, a strategy of adaptive harmonic compensation method is proposed, and the parameters related are designed.In addition the dynamics of the system due to the interaction between the controller and the adaptive compensation scheme are analyzed.The experimental results show that the proposed method has a good effect to mitigate low order harmonics and can improve the quality of current injected to the grid.