基于模糊滑模与PI+重复控制的电压型PWM整流器研究  

Research on voltage-type PWM rectifier based on fuzzy sliding mode,PI and repetitive control

作　　者：纪天成 亓迎川[1] JI Tiancheng;QI Yingchuan(Air Force EarlyWarning Academy,Wuhan 430019,China)

机构地区：[1]空军预警学院,武汉430019

出　　处：《空军预警学院学报》2020年第4期288-292,296,共6页Journal of Air Force Early Warning Academy

摘　　要：针对传统PI控制方式下三相电压型PWM整流器动态响应特性、抗干扰能力较差的问题,提出一种双闭环控制策略.该控制策略电压外环采用鲁棒性较高的滑模控制来稳定直流侧电压,结合模糊控制有效减小系统在滑模面上的抖振;电流内环采用并联式PI+重复控制,保证反馈值迅速跟踪给定值,同时拥有较高的抗干扰性和较低的稳态误差.最后利用仿真软件进行了仿真实验.仿真结果表明,本文的控制策略可以实现PWM整流器单位功率因数运行,并且拥有较好动态响应特性以及较强的抗干扰能力.In view of the poor dynamic response characteristics and anti-interference ability of the three-phase voltage-type PWM rectifier under the traditional PI control mode,this paper proposes a double closed-loop control strategy.Its voltage outer loop uses a sliding mode control with relatively higher robustness to stabilize the DC side voltage,combined with fuzzy control to effectively reduce the system chattering on the sliding mode surface.The current inner loop adopts parallel PI and repetitive control to ensure that the feedback value quickly tracks the given value,simultaneously having high anti-interference and low steady-state error.Finally,a simulation experiment is carried out by using simulation software.The simulation results show that the control strategy proposed in the paper can realize the operation of PWM rectifier with unit power factor and has good dynamic response characteristics and strong anti-jamming capability.

关 键 词：电压型PWM整流器 模糊滑模控制 PI+重复控制 

分 类 号：TM46[电气工程—电器]