中文摘要：

为了改善不同电网条件下并网逆变器的稳定性和进网电流质量,提出电网电压比例加权前馈和附加相角补偿的谐波准谐振电流控制策略,明确了比例加权系数与谐波准谐振控制器可叠加次数之间的联系,给出一套完整的控制参数设计方法。该控制策略可在保证逆变器与电网级联系统稳定的前提下,最大化利用电网电压前馈和附加相角补偿的谐波准谐振控制的优势,提高逆变器输出阻抗模值,实现高质量的进网电流。理论和对比实验表明,该方法可以兼顾级联系统的稳定性和进网电流低次谐波抑制,为提升逆变器对电网的适应能力提供一种简单有效的解决方案。

英文摘要：

To improve the inverter＇s stability and the injected current quality under different utility, a current control strategy which combines grid voltage proportional weighted feed-forward and harmonic quasi-resonant control with phase compensation was proposed. The relationship between the weighted coefficient and the number of the harmonic quasi-resonant is studied. Simultaneously, the parameter design method was provided. With the inverter-grid cascaded system stability guaranteed, the control strategy can utilize the advantage of the grid voltage feed-forward and the harmonic quasi-resonant control to a maximized extent. Therefore, the inverter output impedance was enlarged to realize high current quality. Theoretical analysis and comparative experimental results validates that the proposed control strategy provides a promising solution for improving the inverter＇s adaptability to a varied utility.