摘要
为了提高三相电压型逆变器对负载变化的鲁棒性,提出一种电压单环的电流前馈控制算法。首先,给出了逆变器系统电流前馈控制算法的设计思想来源,讨论了多输入多输出非线性系统的中间变量的前馈控制律;其次,根据三相电压型逆变器的d-q数学模型,将多输入多输出非线性系统的中间变量的前馈控制律应用到三相电压型逆变器系统中,建立了其电流前馈控制数学模型,并利用李雅普诺夫第二判别法分析了闭环系统的稳定性,同时讨论了闭环控制系统的跟随性;最后,通过仿真实验验证了所提出的算法的合理性和有效性。
In order to improve the robustness of three-phase voltage source inverter to load changes,a current feed forward control algorithm of voltage single closed loop is proposed.Firstly,the design ideal source of current feed-forward control algorithm for inverter system is given,and the feed-forward control law of intermediate variables for multiple input multiple output nonlinear system is discussed.Secondly,according to the mathematical d-q model of three-phase voltage inverter.The feedforward control law of intermediate variable of multiple input multiple output nonlinear system is applied to the three-phase voltage inverter system.The mathematical model of current feed-forward control is established.The stability of the closed-loop control system is analyzed by the Lyapunov second discriminant method,and the following property of the closed-loop control system is discussed.Finally,the rationality and effectiveness of the algorithm are verified by simulation experiment.
作者
董锋斌
吴奥
DONG Fengbin;WU Ao(College of Electrical Engineering,Shaanxi University of Technology,Hanzhong 723001,China)
出处
《控制工程》
CSCD
北大核心
2023年第6期1017-1023,共7页
Control Engineering of China
基金
陕西省自然科学基础研究计划资助项目(2023-JC-YB-442)
陕西省技术创新引导专项计划项目(2022QFY-08-05)。
关键词
三相电压型逆变器
电流前馈控制
李雅普诺夫判别法
Three-phase voltage source inverter
current feed forward control
Lyapunov discriminant method
