基于LCL滤波的PWM整流器新型控制策略  

Novel control strategy for PWM rectifier with LCL filter

作　　者：张正传[1] 刘跃敏[1] 范波[1] 李鹏飞[1] 

机构地区：[1]河南科技大学电子信息工程学院,河南洛阳471003

出　　处：《兰州理工大学学报》2014年第4期92-96,共5页Journal of Lanzhou University of Technology

基　　金：河南省教育厅自然科学研究项目(2011B470003)

摘　　要：针对LCL滤波器存在的谐振问题,提出一种基于固定开关频率控制的LCL滤波PWM整流器控制策略.利用系统延时和固定开关频率控制本身的阻尼,通过调节PI调节器的采样时间实现系统稳定,采用简化电容传感器设计,优化系统结构.仿真实验及结果分析表明,系统动态性能良好,网侧电流谐波明显减少,滤波器产生的谐振得到了有效抑制.Aimed at the problem of resonance in LCL filter, a control strategy for PWM rectifier with LCL filter is proposed, where the fixed switching frequency control is employed. The system time delay and the damping in the fixed switching frequency control proper are used to realize the system stability by means of adjusting the sampling time of the PI regulator. The system configuration is optimized by designing simplified capacitance sensors. The simulation experiment and its result analysis show that the system has excellent dynamic performance and the current harmonics on grid side are reduced significantly and the resonance generated by the filter can be effectively suppressed.

关 键 词：PWM整流器 LCL滤波器 固定开关频率控制 采样时间 

分 类 号：TM461[电气工程—电器]