基于偏差解耦扰动观测器的Fuzzy-PI 逆变器电流环控制策略

Fuzzy-PI Inverter Based on Deviation Decoupling Disturbance Observer Current Loop Control Strategy

当电感参数发生变化时,L型逆变器在两相旋转坐标系下存在 dq轴电流耦合问题。本文将偏差解耦扰动观测器用于 L型逆变器流环控制,该控制方案可以有效抑制电感参数变化引起的 dq轴电流耦合现象;为了提高控制器的动态响应速度,对逆变器电流环控制中的 PI进行优化改进,提出一种基于偏差解耦扰动观测器的 Fuzzy PI逆变器电流环控制策略。最后,通过实验验证了该方案既不仅可以有效抑制 dq轴间的电流耦合,又保证了系统的动态特性。

When the inductance parameters change, the problem of dq axis current coupling exists in the two-phase rotating coordinate system of L-type inverters. In this paper, the deviation decoupling disturbance observer was applied to the current loop control of L-type inverters. The control scheme can effectively suppress the current coupling phenomenon of dq axis caused by the variation of inductance parameters. In order to improve the dynamic response speed of the controller, the PI in the current loop control of inverters was optimized and improved, and a current loop control strategy of fuzzy-PI inverters based on the deviation decoupling disturbance observer was proposed. Finally, the experimental results show that the scheme can not only effectively suppress the current coupling between the dq axes, but also ensure the dynamic characteristics of the system.