基于自抗扰技术的三相电力电子负载电流控制

Current Control of Three-Phase Power Electronic Load Based on Auto Disturbance Rejection Technology

提出一种基于自抗扰技术的三相电力电子负载模拟变换器电流控制方法,解决了传统电流控制存在电流解耦困难、参数摄动、抗干扰能力差的问题。通过建立基于同步旋转d/q坐标系下负载模拟变换器的数学模型,分析电流耦合产生的机理以及影响系统的扰动。设计一阶自抗扰控制器,将系统分析得到的问题作为系统扰动并通过自抗扰控制器消除扰动,以达到控制效果,并选定该控制器参数整定方法。仿真、实验结果表明,所提出的基于自抗扰技术的三相电力电子负载的电流控制方法可确保负载模拟变换器获得较好的稳态和动态性能,特别是针对电流耦合以及系统外部扰动和内部扰动都具有较好的控制效果。

A current control method of three-phase power electronic load analog converter based on auto disturbance rejection technology is proposed, which solves the problems of current decoupling parameter perfurbation and poor anti-interference ability in traditional current control. By establishing the mathematical model of load analog converter based on synchronous rotation d/q coordinate system, the factors affecting the stability of the system are analyzed. Design the first-order active disturbance rejection controller, take the problem obtained by the system analysis as the system disturbance and eliminate the disturbance through the active disturbance rejection controller to achieve the control effect, and select the parameter tuning method of the controller. The simulation and experiment results show that the current control method of three-phase power electronic load based on auto disturbance rejection technology can ensure that the load analog converter can achieve better steady-state and dynamic performance, especially for the current coupling, external disturbance and internal disturbance of the system.