不对称电压下PWM整流器的变结构自抗扰控制

发布时间：2018-05-12 18:37

本文选题：不对称电压 + PWM整流器　；参考：《电机与控制学报》2014年01期

【摘要】：为抑制PWM整流器在不对称电网电压时的谐波功率以及负载扰动对直流侧电压的影响,提出了一种基于变结构自抗扰理论的新型电压控制方法。将自抗扰控制与变结构控制器相结合,设计了变结构自抗扰控制器。正负序电流环采用变结构自抗扰控制,以此来消除电流环的耦合对系统的扰动,并消除功率传输中的谐波分量。新型控制器在保持原自抗扰控制器特点的同时减少了可调参数,使得参数整定变得容易,改善了系统控制性能。仿真以及实验结果表明,此方法能够对输出电压快速并无超调的进行控制,并能有效抑制传输中谐波功率和负载变化对系统的影响。
[Abstract]:In order to suppress the influence of harmonic power and load disturbance on DC side voltage of PWM rectifier under asymmetric grid voltage, a novel voltage control method based on variable structure active disturbance rejection theory is proposed. A variable structure active disturbance rejection controller is designed by combining active disturbance rejection control with variable structure controller. A variable structure active disturbance rejection control is used in the positive and negative sequence current loop to eliminate the disturbance caused by the coupling of the current loop and the harmonic component in power transmission. The new controller not only keeps the characteristics of the original ADRC but also reduces the adjustable parameters which makes the parameter setting easier and improves the control performance of the system. The simulation and experimental results show that this method can control the output voltage quickly and without overshoot, and can effectively suppress the influence of harmonic power and load change on the system.
【作者单位】：湖南大学国家电能变换与控制工程技术研究中心;江南工业集团有限公司;
【基金】：国家国际科技合作项目(2011DFA62240) 湖南省国际科技合作项目(2011WK2012)
【分类号】：TM461

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