基于状态反馈和重复控制的离网逆变控制研究
Research on Off-grid Inverter Control Based on State Feedback Plus Repetitive Control
谭翠兰 1刘振领 1周利华 1杨志红1
作者信息
- 1. 江汉大学,智能制造学院,湖北 武汉 430056
- 折叠
摘要
离网运行逆变电源的控制目标是在接入任意负载时均保持输出电压稳定.针对恒压恒频(CVCF)离网逆变器接入非线性负载时易引起输出电压波形失真导致谐波含量大的问题,提出一种基于极点配置的状态反馈控制加重复控制策略改善输出电压波形.以单相CVCF离网逆变器为研究对象,在Matlab/Simulink中搭建仿真模型,依据控制理论建立逆变器连续域的状态空间方程并进行离散化,通过极点配置确定状态反馈控制器参数,使输出电压能够快速准确跟踪给定电压,并在此基础上嵌入重复控制器进一步减小输出电压稳态误差,从而降低其谐波含量.仿真与实验验证了所设计控制算法的有效性.
Abstract
The control object of the off-grid inverter is to maintain stable output voltage when connected to any load.Aiming at the problem that the output voltage waveform is prone to distorted and causes high harmonics when a con-stant-voltage constant-frequency(CVCF)inverter is connected to nolinear load,a state feedback control based on pole assignment plus with repetitive control is proposed to improve output voltage.Taking the single-phase CVCF off-grid inverter as the research project,a simulation model is built in Matlab/Simulink.The state space equation of the in-verter is established and discretized based on control theory,and the control parameters are obtained by appointed desired poles according to state feedback control theory so that the output voltage can track the reference quickly.In addition,a repetitive controller is embedded to further reduce steady-state error so that harmonic distortion can be de-creased further.The simulation and experimental results verify that the designed control algorithm can track the refer-ence signal quickly and exactly.
关键词
逆变器/状态反馈/重复控制/恒压恒频Key words
inverter/state feedback/repetitive control/constant-voltage constant-frequency引用本文复制引用
出版年
2025
NETL
NSTL
万方数据