采用LCL滤波器的无电压传感器三相并网逆变器技术  

Voltage Sensorless Three-phase Grid-Connected Inverter Technology Using LCL Filter

作　　者：曹以龙 余小婵 CAO Yilong;YU Xiaochan(School of Electronics and Information Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]上海电力大学电子与信息工程学院,上海200090

出　　处：《上海电力大学学报》2021年第3期211-216,共6页Journal of Shanghai University of Electric Power

基　　金：国家自然科学基金(51877130)。

摘　　要：传统三相并网逆变器增设过多的交流电压传感器,降低了系统的可靠性。鉴于此,提出了一种改进型无电压传感器控制策略,与PQ间接电流控制技术相结合,并详细讨论了输出滤波器的建模、设计步骤以及对被动阻尼的要求。在进行LCL滤波系统的参数设计过程中,根据LCL滤波电容的Y型接法和Δ型接法,进行了分类分析和设计。最后,搭建了实物模型对理论分析进行检验,实验验证了所提控制策略的有效性。Traditional three-phase grid-connected inverter has too many AC voltage sensors,which reduces the reliability of the system.In view of this,an improved voltage sensorless control strategy combined with PQ indirect current control technology is proposed,and the modeling,design steps and passive damping requirements of the output filter are discussed in detail.In the process of parameter design of the LCL filter system,the Y-type connection and the delta-type connection of the LCL filter capacitor were analyzed and designed by classification.Finally,a physical model is built to test the experimental results,and the experiment verifies the effectiveness of the proposed control strategy.

关 键 词：LCL滤波器 STM320F28069 并网 逆变器 

分 类 号：TM464[电气工程—电器]