基于滑模控制的逆变电源系统研究

Research on Inverter Power System Based on the Sliding-Mode Control

由于逆变电源的非线性特性,采用常规控制法会使参数变化敏感、带载波形畸变严重以及负载突变时动态响应速度减慢。针对上述缺点本研究采用基于给定三角波的滑模变结构控制,通过建立系统的变结构模型、选择切换面函数和控制率分析滑模域,引用李导数分析滑模运动存在的条件,用定频控制削弱抖振。实验证明了该控制方法的有效性。

Owing to the nonlinear characteristics of the inverter power,the adoptation of the conventional control method can make the parameter be sensitive,the loading waveform become serious distortion and the dynamic response speed become slow when the loads mutates.With an aim at the above defects,this research adopts the sliding-mode variable structure control based on the given triangle wave.The sliding-mode area is analyzed through the establishment of the variable structure model of the system and the selection of the switch surface function and control rate.change,the response slow,use a method based on triangle of given wave sliding-mode control.Through establishing the variable structure model of the system,choosing the switching surface function and control rate.Lie derivative is used to analyze the existing conditions of the sliding-mode movement and the fixed frequency is used to weaken the chattering.The experiments prove the effectiveness of this control method.