光伏并网逆变器的控制策略研究及仿真(英文)

Research and simulation of control strategy onphotovoltaic grid-connected inverter

在分析光伏并网逆变器发展及结构的基础上,提出新的控制算法,确定采用电压型输入和电流型输出控制的逆变器。根据SVPWM的控制特点,提出空间矢量脉冲宽度调制方法,从而提高了直流电压的利用率,减少了注入电网的谐波。基于SVPWM的控制原理,通过Matlab建立系统模型,仿真验证了控制算法的可行性。

Based on analyzing development and structure of photovohaic grid-connected inverter, a new control arithmetic that named Space Vector Pulse Width Modulation（SVPWM） is introduced, in which inverter is controlled by voltage type input and current type output. It raises the utilization ratio of DC voltage and reduces the harmonic wave of infusing into power grid, according to the control characteristics of SVPWM. The feasibility of control algorithm is verified by establishing the system model using the Matlab.