中文摘要：

分布式光伏并网发电系统的电网环境复杂多变，并网逆变器采用控制参数固定不变的比例积分（PI）控制策略难以保证其在各种电网环境下都能稳定运行。这里在传统控制策略的基础上提出一种调制电压为电网电压前馈加上电流给定与电流反馈线性组合的自适应控制策略，其电流给定系数与电流反馈系数能根据电网环境自适应调整变化。使用利亚普若夫理论证明了该新型控制策略的稳定性，并用Madab仿真和实际工程实验进一步证明该控制策略效果理想。

英文摘要：

Power grid environment of distributed grid-connected photovoltaic power generation system is complicated, so it is difficult to guarantee the stable operation of grid-connected inverter under all kinds of power grid environment when the control parameters of proportional integral（PI） controller are fLxed.This paper proposes an adaptive control strategy that modulation voltage is utility voltage feed-forward plus a linear combination of current given and current feedback on the basis of the traditional control strategy, its coefficients of current given and current feedback can be adjusted according to the changing grid environment.Use of Lyapunov stability theory proves that the stability of the new control strategy, with Matlab simulation and practical experiment further prove that the ideal effect of control strategy.