基于Posicast+重复控制的逆变控制系统设计  

Design of Inverter Control System Based on Posicast+Repetitive Control

作　　者：李小玉 李丹 张姿姿 LI Xiao-yu;LI Dan;ZHANG Zi-zi(State Grid Hebei Electric Power Research Institute,Shijiazhuang 050021,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,河北石家庄050021

出　　处：《电力电子技术》2022年第4期30-34,共5页Power Electronics

基　　金：国网河北省电力有限公司科技项目(kj2020-051)。

摘　　要：针对逆变器传统双环控制方案动态过程振荡和抗干扰能力差、存在跟踪误差的问题,提出了Posicast+重复控制的改进控制方案。首先分析了传统逆变器双环控制系统的谐振峰问题,将Posicast控制置入电流控制环路,以实现谐振峰的抑制。在此基础上,引入重复控制策略,实现交流信号的无差跟踪和周期性干扰信号的抑制,并讨论了重复控制器的设计方案和控制系统的稳态性能。最后,在20 kW的单相逆变器平台上,验证了所提控制策略的正确性和有效性。Traditional dual loop control scheme for inverter has the problems of dynamic process oscillation,poor antiinterference ability and tracking error.The improved control scheme of Posicast+repetitive control strategy is pointed out.Firstly,the resonant peak of the traditional inverter dual loop control system is analyzed,and the Posicast control is placed in the current control loop to suppress the resonant peak.And then,repetitive control strategy is introduced to realize the zero steady state error tracking of AC signal and the suppression of periodic interference signal.The design scheme of repetitive controller and the performance analysis of control system are discussed.At last,the correctness and effectiveness of the proposed control strategy are verified using a 20 kW single-phase inverter platform.

关 键 词：逆变器 双环控制 重复控制 

分 类 号：TM464[电气工程—电器]