电压型逆变器的重复控制与准比例谐振的双闭环控制研究  

Double closed loop control on repetitive control and quasi-proportional resonance of voltage type inverter

作　　者：张坤 罗文广[1,2] ZHANG Kun;LUOWenguang(School of Electrical,Electronic and Computer Science,Guangxi University of Science and Technology,Liuzhou 545616,China;Guangxi Key Laboratory of Automobile Component and Vehicle Technology(Guangxi University of Science and Technology),Liuzhou 545006,China)

机构地区：[1]广西科技大学电气电子与计算机科学学院,广西柳州545616 [2]广西汽车零部件与整车技术重点实验室(广西科技大学),广西柳州545006

出　　处：《广西科技大学学报》2022年第3期22-28,共7页Journal of Guangxi University of Science and Technology

基　　金：国家自然科学基金项目(61563006);广西自然科学基金重点项目(2020GXNSFDA238011)资助。

摘　　要：由于逆变器的传统单闭环控制动态性能和抗干扰能力差,以单相电压型全桥逆变器为研究对象,采用双闭环控制策略进行研究,即内环电流采用比例积分(proportional integral,PI)控制,外环电压在引入重复控制的同时加入准比例谐振控制算法。通过单相电压型全桥逆变电路在空载情况下的系统频率特性,对其幅频特性和相频特性进行了补偿,对特定频率的指令信号实现无静差跟踪,解决了单相逆变器输出电压在重复控制下第一个周期内存在周期延迟的问题,电压总谐波含量从0.06%降至0.04%,提升了系统的动态性能和抗干扰能力。Matlab仿真结果表明,相比于传统的单外环重复控制(repetitive control,RC)+准比例谐振(quasi-proportional resonance,QPR)控制,双闭环控制(外环RC+QPR、内环PI)对系统总谐波畸变(total harmonicdistortion,THD)率的降低效果更佳。A double closed loop control strategy of a single-phase voltage-type full-bridge inverter was proposed to improve dynamic performance and anti-interference ability of the traditional single closed loop.The inner loop current was controlled by PI.The outer loop voltage adopted the repetitive control while adding the quasi-proportional resonance control algorithm.The amplitude-frequency characteristics and phase-frequency characteristics were compensated through the system frequency characteristics of the single-phase voltage-type full-bridge inverter circuit under no load.The command signal of a specific frequency was tracked without static error.And the cycle delay in the first cycle of the output voltage of the single-phase inverter under repeated control was solved.The total harmonic content of the voltage reduced from 0.06%to 0.04%.Thus the dynamic performance and anti-interference ability of the system were improved.Matlab simulation results show that the double closed loop control strategy(outer loop RC+QPR,inner loop PI)has a better effect on reducing the total harmonic distortion rate of the system compared with the traditional single closed loop strategy(RC+QPR).

关 键 词：逆变器 双闭环 频域分析法 PI 重复控制 准比例谐振 

分 类 号：TM464[电气工程—电器]