摘要
提出一种新型光伏逆变器控制策略,将电压外环由改进型线性自抗扰控制器(LADRC)进行控制。改进型LADRC控制策略由常规PD控制规律、线性扩张状态观测器(LESO)和校正环节构成。相较于传统LADRC而言,改进型LADRC的高频衰减能力明显提高,在频域中对改进型LADRC的收敛性、稳定性及抗干扰能力进行分析,通过Bode图分析表明,改进型LADRC的抗干扰能力明显增强。多工况下仿真分析表明,该方法具备更好的动态性能,受扰动影响更小,具备更好的抗干扰能力。
The paper proposes a new photovoltaic inverter control strategy to control the voltage outer loop by an improved linear auto-disturbance rejection controller(LADRC).The improved LADRC control strategy was composed of conventional PD control law,linear expansion state observer(LESO)and correction link.Compared with the traditional LADRC,the improved LADRC s high-frequency attenuation capability was significantly improved.The convergence,stability,and anti-interference ability of the improved LADRC in the frequency domain were analyzed.The Bode diagram analysis shows that the anti-interference capability of the improved LADRC is obviously enhanced.Simulation analysis under multiple operating conditions shows that the improved method has better dynamic performance,less influence by disturbance,and better anti-interference ability.
作者
周雪松
王佳垚
马幼捷
Zhou Xuesong;Wang Jiayao;Ma Youjie(School of Electrical and Electronic Engineering,Tianjin University of Technology,Tianjin 300384,China)
出处
《计算机应用与软件》
北大核心
2023年第6期23-28,76,共7页
Computer Applications and Software
基金
国家自然科学基金面上项目(51877152)
天津市自然科学基金项目(18JCZDJC97300)。
关键词
光伏并网逆变器
线性自抗扰控制
频域分析
抗干扰能力
线性扩张状态观测器
Photovoltaic grid-connected inverter
Linear active disturbance rejection control
Frequency domain analysis
Anti-interference ability
Linear extended state observer
