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)。首先分析逆变器的主拓扑结构,建立在dq轴数学模型,其次介绍非线性自抗扰(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、估计对象状态并进行控制和补偿,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。
英文摘要:
In order to solve the decoupling problem of microgrid inverter and improve its anti-interference ability, a two-mode active disturbance rejection switching control strategy is proposed in paper. First analysis of the main inverter topology, mathematical model based on dq axis, secondly introduces the immunity and Linear self immunity features of the controller, coupling, internal and external disturbance as total disturbance. A dual-mode active disturbance rejection switching control strategy is designed to track disturbance, estimate the state of the object, control and compensate, and give a parameter setting method. MATLAB also fully shows the feasibility and correctness of the proposed strategy, and the anti-interference ability and decoupling performance are good.