微网逆变器双模式自抗扰控制策略

Dual-mode active disturbance rejection control strategy for micro-grid inverter

为解决微网逆变器的解耦问题,提高其抗干扰能力,文章提出一种双模式自抗扰切换控制策略(SADRC)。文中分析了逆变器的主拓扑结构,建立了在dq轴的数学模型,文中介绍了非线性自抗扰(Unlinear Active Disturbance Rejection Control,NLADRC)和线性自抗扰(Linear Active Disturbance Rejection Control,LADRC)控制器的特性,将耦合、内外部扰动作为总扰动,设计双模式自抗扰切换控制策略跟踪扰动、估计对象状态,进行控制和补偿,并给出参数的整定方法。MATLAB仿真平台也充分表明所提策略的可行性和正确性,抗干扰能力和解耦性能较好。

In order to solve the decoupling problem of micro-grid inverter and improve its anti-interference ability,a dual-mode active disturbance rejection switching control strategy(SADRC)is proposed.This paper analyzes the main topology of inverter,establishes mathematical model based on dq axis;introduces the features of unlinear active disturbance rejection control(NLADRC)and linear active disturbance rejection control(LADRC)of the controller,taking the coupling,internal and external disturbance as total disturbance,and a dual-mode active disturbance rejection switching control strategy is designed to track disturbance,estimate the state of the object,control and compensate,and a parameter setting method is given.Finally,the MATLAB simulation platform also fully shows the feasibility and correctness of the proposed strategy,and the anti-interference ability and decoupling performance are good.