光伏并网逆变器分数阶滑模二自由度内模控制

Fractious-order Sliding Module Two-degree-of-freedom Internal Module Control for Grid-connected Photovoltaic Inverter

为提高光伏并网逆变器的动态品质和鲁棒性能,削减传统滑模控制中存在的系统抖振,改善一自由度内模控制无法兼顾系统跟随性和抗干扰性的局限性,通过引入分数阶微积分算子和二自由度内模控制算法,提出一种光伏并网逆变器分数阶滑模二自由度内模控制方法。经仿真测试结果表明,相较于传统滑模一自由度内模控制算法,该控制方法具有较好的并网跟随性,在网压波动时可有效削减系统抖振,改善系统抗干扰能力,提升系统的鲁棒性。

In order to heighten the dynamic quality and robust performance of grid-connected photovoltaic inverter,reduce the limitations of taking into consideration of following performance and anti-interference inside the one-degree-of-freedom internal module control,by introducing fractious-order integrate differential operator and two-degree-of-freedom internal module control algorithm,a fractious-order integral differential operator method for grid-connected photovoltaic inverter is put forward.The simulation and test results show that the control method has good following performance of grid-connection,compared with the traditional sliding module one-degree-of-freedom internal module control method.It is able to effectively reduce the system jittering when the grid voltage is fluctuating,improve the system anti-interference capability and improve the system robustness.