CAJ | 학술논문

针对传统电压外环控制方法存在的抗扰性能不佳等问题,提出了三相电压型脉宽调制（PWM）整流器的自抗扰控制策略。基于PWM整流器在同步旋转坐标系下的数学模型,利用反馈线性化控制,设计了电流内环控制器。通过构造新型非线性状态误差反馈函数,对传统自抗扰控制进行了改进,从理论上证明了该方法收敛速度优于线性状态误差反馈函数,同时解决了控制力抖动问题。设计了基于改进型自抗扰控制的PWM整流器电压外环控制器,并给出了该控制器参数整定方法。实验结果表明,所提出的自抗扰控制策略可确保PWM整流器获得较好的稳态和动态性能,特别是在抵抗电网电压扰动和负载扰动方面具有优越性。
침대전통전압외배공제방법존재적항우성능불가등문제,제출료삼상전압형맥관조제（PWM）정류기적자항우공제책략。기우PWM정류기재동보선전좌표계하적수학모형,이용반궤선성화공제,설계료전류내배공제기。통과구조신형비선성상태오차반궤함수,대전통자항우공제진행료개진,종이론상증명료해방법수렴속도우우선성상태오차반궤함수,동시해결료공제력두동문제。설계료기우개진형자항우공제적PWM정류기전압외배공제기,병급출료해공제기삼수정정방법。실험결과표명,소제출적자항우공제책략가학보PWM정류기획득교호적은태화동태성능,특별시재저항전망전압우동화부재우동방면구유우월성。
Traditional voltage-outer-loop controllers have weak disturbance rejection ability,therefore,auto-disturbance rejection control（ADRC） for three-phase voltage-type pulse-width-modulation（PWM） rectifier is proposed.Based on the PWM rectifier model in the synchronous reference frame,a current-inner-loop controller is designed with the feedback linearization control method.The traditional ADRC is improved with the new nonlinear state error feedback function.Moreover,its convergence speed is faster than the speed of the linear state error feedback function,and the chattering of the traditional ADRC is eliminated.The voltage-outer-loop controller and its parameters tuning methods are given based on the improved ADRC.Experimental results show that,the proposed PWM rectifier control system has better steady and dynamic performances,and especially has a good rejection ability of disturbances in AC voltage and DC load.