三相并网逆变器准比例谐振控制仿真研究  

The Research on the Control Method of the Three-phase Photovoltaic Grid-connected Inverter based on Quasi-PR Control

作　　者：胡伟[1] 孙志毅[1] 刘立群[1] 申书霞 秦硕[1] 

机构地区：[1]太原科技大学电子信息工程学院,太原030024

出　　处：《电气技术》2015年第8期25-28,44,共5页Electrical Engineering

基　　金：山西省科技攻关项目(20120322005-01)

摘　　要：三相光伏并网逆变器常见的控制策略是简单可靠的PI控制,但该方法对正弦信号的跟踪存在误差,并要经过频繁的坐标变换以及附加前馈解耦。因此在介绍三相并网逆变系统的拓扑结构与数学模型的基础上,设计了一种基于准比例谐振控制的新型交流PI控制策略,并叠加了针对特定次谐波的谐波补偿器。此策略可以实现对正弦电流的零误差静态跟踪并改善系统对特定次谐波的抑制效果。最后通过仿真得出此方法可以获得对并网指令电流的零稳态跟踪误差和较小的谐波量,提高了并网波形质量。The common control method of three-phase photovoltaic grid-connected inverter is simple and reliable PI control. But PI controller cannot achieve zero static error tracking. It also needs coordinate transformation and feed-forward decoupling control. Through theoretical analysis of the topology and models of the three-phase photovoltaic grid-connected inverter, a new control strategy, based on quasi-PR control, is proposed to achieve zero static error tracking completely. And the specific harmonic compensation controller is introduced to reduce the grid current waveform distortion rate. With the help of simulation and experiment, the results testify that the proposed control strategy is effective.

关 键 词：三相光伏并网逆变器 电流控制 准比例谐振控制器 谐波补偿器 

分 类 号：TM464[电气工程—电器]