摘要
本文讨论传统控制方法在LCL型并网逆变器中的局限性,在此基础上对LCL型逆变器引入PI+重复控制方法,分别在控制系统稳定性条件、补偿函数设计方法以及控制系统谐波抑制特性等方面做较为详细的理论分析。最后通过仿真结果表明,该控制方法在保证系统稳定前提下,既提升了LCL型并网逆变器抑制谐波能力,也改善了系统动态响应性能。
This paper discussed the limitation of the traditional control method for grid-connected inverters with an LCL filter. On this basis,the proportional integral（ PI） and repetitive control method was adopted. Stability criterions,compensation methods,and the harmonic suppression ability were respectively analyzed in detail. Finally,the simulation results show that this control method can not only boost the ability of the LCL-type grid-connected inverter to restrain harmonic wave,but also improve the system dynamic response performance under the prerequisite of guaranteeing system stability.
作者
覃发梧
吴健芳
QIN Fa-wu;WU Jian-fang(School of Electrical Engineering of Guangxi University,Nanning 530004,China)
出处
《电气开关》
2018年第5期77-80,85,共5页
Electric Switchgear
关键词
并网逆变器
LCL滤波器
重复控制
复合控制
谐波抑制
grid-cornectedinverter
LCL filter,repetitive control
compound control
harmonic suppression
