不对称电压下PWM整流器的变结构自抗扰控制  

Variable structure ADRC control of pulse width modulation rectifier under asymmetrical input voltages

作　　者：黄庆[1] 黄守道[1] 陈泽远[1] 周滔滔[1] 马敏 邹永 匡江传[1] 

机构地区：[1]湖南大学国家电能变换与控制工程技术研究中心,湖南长沙410082 [2]江南工业集团有限公司,湖南湘潭411207

出　　处：《电机与控制学报》2014年第1期50-55,共6页Electric Machines and Control

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)

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。In order to suppress the harmonic power and load disturbance effect to the DC bus voltage the condition that the PWM rectifier works with asymmetrical grid voltage, a new voltage control method was proposed based on variable structure active disturbance rejection control （VS-ADRC）theory. Combining variable structure control with active-disturbance rejection controller（ ADRC ）, the variable structure ac- tive disturbance rejection controller was designed. In order to eliminate the perturbation to the system caused by current loop coupling and the harmonic composition in power transmission, VS-ADRC was used in positive and negative sequence current loop. The improved controller not only maintains the original features of ADRC ,but also reduces the adjustable parameters, which makes it easy to parameter setting and makes control performance better. Simulation and experimental results show that this method can control the output voltage fast and not overshoot, and suppress the impact to the system caused by har- monics power in transmission and load changes effectively.

关 键 词：不对称电压 PWM整流器 电压定向 变结构控制 自抗扰控制器 

分 类 号：TM461[电气工程—电器]