摘要
为了实现单相全桥电压型逆变器对正弦指令的无静差跟踪,提出一种非线性控制策略。基于逆变器的工作原理分析了其大信号模型。从系统的控制目标出发,根据系统稳态的特点定义了中间变量的参考值,进而将负载电流前馈到控制量中,得到了一种非线性控制模型。为了减少非线性控制模型中参数选择的盲目性,利用微分方程特征根的分布,并结合工程上衰减周期的选取原则,得到了系统控制参数合理的取值范围。最后通过试验验证了该控制策略的可行性和参数选择的有效性。
In order to follow the tracks of sine command without static error for the single-phase full bridge voltage source inverter,a nonlinear control strategy was proposed.Based on the working principle of single-phase inverter,the big signal dynamic mathematical models were analyzed.Starting from the control target of system,the reference value of intermediate variable was defined according to the characteristics of the system steady state.The load currents were made forward feedback to control variable and the nonlinear control model was deduced.In order to reduce the blindness of nonlinear control model parameter selection,based on the distribution of the characteristic root of differential equation and the principle of selecting attenuation period in engineering,the reasonable selection range of parameters of control law were deduced.Finally,the feasibility of control strategy and the validity of the parameter selection were verified by experiments.
作者
王锦博
董锋斌
荔凡凡
吴奥
WANG Jinbo;DONG Fengbin;LI Fanfan;WU Ao(School of Electrical Engineering,Shaanxi University of Technology,Hanzhong 723000,China)
出处
《电工技术》
2019年第23期16-18,23,共4页
Electric Engineering
关键词
单相全桥电压型逆变器
电流前馈
非线性控制
参数选择
the single-phase full bridge voltage source inverter
currents feed-forward
nonlinear control
parameter selection
