基于非线性自抗扰方法的电压型整流器直接功率控制策略  

Voltage rectifier direct power control strategy based on nonlinear ADRC method

作　　者：王东阳[1] 王奔[1] 吴桂良[1] 

机构地区：[1]西南交通大学电气工程学院,成都610031

出　　处：《电测与仪表》2015年第6期77-81,共5页Electrical Measurement & Instrumentation

摘　　要：电压型PWM整流器是一非线性、多变量、强耦合系统,对外界扰动和系统参数变化比较敏感。其直接功率控制策略有功率因数高、交流侧谐波低和算法简单的优点,但当有扰动时,控制效果不理想。针对该问题设计了一阶非线性自抗扰控制器来改进传统的控制策略,包括安排过渡过程,利用扩张状态观测器将外界扰动和系统内部扰动归结为总扰动,然后利用非线性反馈控制进行控制。最后,仿真结果表明当系统发生扰动时,改进后的控制策略较原控制策略具有更强的鲁棒性,控制效果理想。Voltage Source PWM rectifier is a nonlinear,multivariable,strong coupling system and it is sensitive to external disturbances and to perturbations in system parameters.Traditional direct power control strategy in PWM rectifier is of the advantages of high power factor,low harmonics of AC side and the strategy is simple,but when there is a disturbance or perturbation,the control effect is not ideal.To solve the problem,the paper designs a first-order active disturbance rejection controller （ADRC） to improve the traditional control strategy,including the arrangement of the transitional process,integrating the external disturbances and perturbations in system parameters as a total disturbance by using the extended state observer （ESO）,then using nonlinear feedback control method to control rectifier.Finally,the simulation results show that when a disturbance or perturbation occurs,the improving control strategy has stronger robustness than the traditional control strategy,and the control results are satisfactory.

关 键 词：电压型换流器 直接功率控制 自抗扰控制器 扩张状态观测器 非线性反馈 

分 类 号：TM933[电气工程—电力电子与电力传动]