中文摘要：

LCL滤波器在中大功率并网逆变器中的应用得到持续关注。但LCL滤波器设计时变量较多且相互间关系紧密,参数难以确定。同时,电流控制同滤波器参数相互依赖、相互制约,共同决定着并网逆变器的稳定性和电流质量。现有的LCL滤波器设计方法都仅考虑了滤波器的滤波性能,未能有效结合电流控制对滤波器参数设计的限制。因此,如何优化设计滤波器以及控制器参数仍较为困难。该文通过建立单逆变侧电流反馈控制下LCL滤波并网逆变器的数学模型,得出控制性能对LCL参数的约束条件。结合滤波性能的需求,总结出了一套LCL滤波器参数和控制器参数的一体化设计方法。最后,通过实验验证了该设计方法的正确性和有效性。

英文摘要：

LCL-type filters have been widely used in medium to high power level grid-connected inverters. However, this filter has several parameters which are closely related to each other and are hard to be decided. Moreover, the current controller and LCL parameters are interdependent and inter-restricted, because they determine the system stability and the current quality together. The existing design methods simply consider the filtering performance of LCL filters without taking into account the constraints raised by the current control. Thus, it is still difficult to optimize the parameters of LCL filters and current controllers. In this paper, based on establishing the model of grid-connected LCL-filtered inverters with single inverter-side current control, the constraints of control performances to LCL parameters were obtained. Furthermore, a novel design method integrated with LCL filter and current controller optimizations has been proposed. At last, experiments have demonstrated the effectiveness of the proposed design.